Merge remote-tracking branch 'upstream/master'

src/core/operations/AddLineNumbers.mjs

@@ -22,7 +22,13 @@ class AddLineNumbers extends Operation {
         this.description = "Adds line numbers to the output.";
         this.inputType = "string";
         this.outputType = "string";
-        this.args = [];
+        this.args = [
+            {
+                "name": "Offset",
+                "type": "number",
+                "value": 0
+            }
+        ];
     }
 
     /**
@@ -33,10 +39,11 @@ class AddLineNumbers extends Operation {
     run(input, args) {
         const lines = input.split("\n"),
             width = lines.length.toString().length;
+        const offset = args[0] ? parseInt(args[0], 10) : 0;
         let output = "";
 
         for (let n = 0; n < lines.length; n++) {
-            output += (n+1).toString().padStart(width, " ") + " " + lines[n] + "\n";
+            output += (n+1+offset).toString().padStart(width, " ") + " " + lines[n] + "\n";
         }
         return output.slice(0, output.length-1);
     }

src/core/operations/AddTextToImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Add Text To Image operation
@@ -127,7 +127,7 @@ class AddTextToImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -163,7 +163,7 @@ class AddTextToImage extends Operation {
             const font = fontsMap[fontFace];
 
             // LoadFont needs an absolute url, so append the font name to self.docURL
-            const jimpFont = await jimp.loadFont(self.docURL + "/" + font.default);
+            const jimpFont = await Jimp.loadFont(self.docURL + "/" + font.default);
 
             jimpFont.pages.forEach(function(page) {
                 if (page.bitmap) {
@@ -190,7 +190,7 @@ class AddTextToImage extends Operation {
             });
 
             // Create a temporary image to hold the rendered text
-            const textImage = new jimp(jimp.measureText(jimpFont, text), jimp.measureTextHeight(jimpFont, text));
+            const textImage = new Jimp(Jimp.measureText(jimpFont, text), Jimp.measureTextHeight(jimpFont, text));
             textImage.print(jimpFont, 0, 0, text);
 
             // Scale the rendered text image to the correct size
@@ -198,9 +198,9 @@ class AddTextToImage extends Operation {
             if (size !== 1) {
                 // Use bicubic for decreasing size
                 if (size > 1) {
-                    textImage.scale(scaleFactor, jimp.RESIZE_BICUBIC);
+                    textImage.scale(scaleFactor, Jimp.RESIZE_BICUBIC);
                 } else {
-                    textImage.scale(scaleFactor, jimp.RESIZE_BILINEAR);
+                    textImage.scale(scaleFactor, Jimp.RESIZE_BILINEAR);
                 }
             }
 
@@ -234,9 +234,9 @@ class AddTextToImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/AnalyseHash.mjs

@@ -35,17 +35,6 @@ class AnalyseHash extends Operation {
     run(input, args) {
         input = input.replace(/\s/g, "");
 
-        // analyze hash if it is bcrypt
-        if (/^\$2[abxy]?\$[0-9]+\$[a-zA-Z0-9/.]{53}$/.test(input)) {
-            input = input.split("$");
-            return "Hash algorithm Identifier: $" + input[1] + "$\n" +
-                "Rounds: " + input[2] + "\n" +
-                "Base64 encoded Input salt(22 bytes): " + input[3].slice(0, 22) + "\n" +
-                "Base64 encoded hash(31 bytes): " + input[3].slice(22) + "\n\n" +
-                "Based on the length, this hash could have been generated by one of the following hashing functions:\n" +
-                "bcrypt";
-        }
-
         let output = "",
             possibleHashFunctions = [];
         const byteLength = input.length / 2,

src/core/operations/BlowfishDecrypt.mjs

@@ -70,10 +70,14 @@ class BlowfishDecrypt extends Operation {
             inputType = args[3],
             outputType = args[4];
 
-        if (key.length !== 8) {
+        if (key.length < 4 || key.length > 56) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-Blowfish uses a key length of 8 bytes (64 bits).`);
+Blowfish's key length needs to be between 4 and 56 bytes (32-448 bits).`);
+        }
+
+        if (mode !== "ECB" && iv.length !== 8) {
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes. Expected 8 bytes.`);
         }
 
         input = Utils.convertToByteString(input, inputType);

src/core/operations/BlowfishEncrypt.mjs

@@ -70,10 +70,14 @@ class BlowfishEncrypt extends Operation {
             inputType = args[3],
             outputType = args[4];
 
-        if (key.length !== 8) {
+        if (key.length < 4 || key.length > 56) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-Blowfish uses a key length of 8 bytes (64 bits).`);
+Blowfish's key length needs to be between 4 and 56 bytes (32-448 bits).`);
+        }
+
+        if (mode !== "ECB" && iv.length !== 8) {
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes. Expected 8 bytes.`);
         }
 
         input = Utils.convertToByteString(input, inputType);

src/core/operations/BlurImage.mjs

@@ -10,7 +10,7 @@ import { isWorkerEnvironment } from "../Utils.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { gaussianBlur } from "../lib/ImageManipulation.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Blur Image operation
@@ -59,7 +59,7 @@ class BlurImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -79,9 +79,9 @@ class BlurImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/CSSSelector.mjs

@@ -6,7 +6,7 @@
 
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import xmldom from "xmldom";
+import xmldom from "@xmldom/xmldom";
 import nwmatcher from "nwmatcher";
 
 /**

src/core/operations/CaretMdecode.mjs

@@ -0,0 +1,98 @@
+/**
+ * @author tedk [tedk@ted.do]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * Caret/M-decode operation
+ *
+ * https://gist.githubusercontent.com/JaHIY/3c91bbf7bea5661e6abfbd1349ee81a2/raw/c7b480e9ff24bcb8f5287a8a8a2dcb9bf5628506/decode_m_notation.cpp
+ */
+class CaretMdecode extends Operation {
+
+    /**
+     * CaretMdecode constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Caret/M-decode";
+        this.module = "Default";
+        this.description = "Decodes caret or M-encoded strings, i.e. ^M turns into a newline, M-^] turns into 0x9d. Sources such as `cat -v`.\n\nPlease be aware that when using `cat -v` ^_ (caret-underscore) will not be encoded, but represents a valid encoding (namely that of 0x1f).";
+        this.infoURL = "https://en.wikipedia.org/wiki/Caret_notation";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+
+        const bytes = [];
+
+        let prev = "";
+
+        for (let i = 0; i < input.length; i++) {
+
+            const charCode = input.charCodeAt(i);
+            const curChar = input.charAt(i);
+
+            if (prev === "M-^") {
+                if (charCode > 63 && charCode <= 95) {
+                    bytes.push(charCode + 64);
+                } else if (charCode === 63) {
+                    bytes.push(255);
+                } else {
+                    bytes.push(77, 45, 94, charCode);
+                }
+                prev = "";
+            } else if (prev === "M-") {
+                if (curChar === "^") {
+                    prev = prev + "^";
+                } else if (charCode >= 32 && charCode <= 126) {
+                    bytes.push(charCode + 128);
+                    prev = "";
+                } else {
+                    bytes.push(77, 45, charCode);
+                    prev = "";
+                }
+            } else if (prev === "M") {
+                if (curChar === "-") {
+                    prev = prev + "-";
+                } else {
+                    bytes.push(77, charCode);
+                    prev = "";
+                }
+            } else if (prev === "^") {
+                if (charCode > 63 && charCode <= 126) {
+                    bytes.push(charCode - 64);
+                } else if (charCode === 63) {
+                    bytes.push(127);
+                } else {
+                    bytes.push(94, charCode);
+                }
+                prev = "";
+            } else {
+                if (curChar === "M") {
+                    prev = "M";
+                } else if (curChar === "^") {
+                    prev = "^";
+                } else {
+                    bytes.push(charCode);
+                }
+            }
+
+        }
+        return bytes;
+    }
+
+}
+
+export default CaretMdecode;

src/core/operations/ChaCha.mjs

@@ -100,7 +100,7 @@ class ChaCha extends Operation {
         super();
 
         this.name = "ChaCha";
-        this.module = "Default";
+        this.module = "Ciphers";
         this.description = "ChaCha is a stream cipher designed by Daniel J. Bernstein. It is a variant of the Salsa stream cipher. Several parameterizations exist; 'ChaCha' may refer to the original construction, or to the variant as described in RFC-8439. ChaCha is often used with Poly1305, in the ChaCha20-Poly1305 AEAD construction.<br><br><b>Key:</b> ChaCha uses a key of 16 or 32 bytes (128 or 256 bits).<br><br><b>Nonce:</b> ChaCha uses a nonce of 8 or 12 bytes (64 or 96 bits).<br><br><b>Counter:</b> ChaCha uses a counter of 4 or 8 bytes (32 or 64 bits); together, the nonce and counter must add up to 16 bytes. The counter starts at zero at the start of the keystream, and is incremented at every 64 bytes.";
         this.infoURL = "https://wikipedia.org/wiki/Salsa20#ChaCha_variant";
         this.inputType = "string";
@@ -191,7 +191,7 @@ ChaCha uses a nonce of 8 or 12 bytes (64 or 96 bits).`);
         if (outputType === "Hex") {
             return toHex(output);
         } else {
-            return Utils.arrayBufferToStr(output);
+            return Utils.arrayBufferToStr(Uint8Array.from(output).buffer);
         }
     }
 

src/core/operations/ContainImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Contain Image operation
@@ -91,20 +91,20 @@ class ContainImage extends Operation {
         const [width, height, hAlign, vAlign, alg, opaqueBg] = args;
 
         const resizeMap = {
-            "Nearest Neighbour": jimp.RESIZE_NEAREST_NEIGHBOR,
-            "Bilinear": jimp.RESIZE_BILINEAR,
-            "Bicubic": jimp.RESIZE_BICUBIC,
-            "Hermite": jimp.RESIZE_HERMITE,
-            "Bezier": jimp.RESIZE_BEZIER
+            "Nearest Neighbour": Jimp.RESIZE_NEAREST_NEIGHBOR,
+            "Bilinear": Jimp.RESIZE_BILINEAR,
+            "Bicubic": Jimp.RESIZE_BICUBIC,
+            "Hermite": Jimp.RESIZE_HERMITE,
+            "Bezier": Jimp.RESIZE_BEZIER
         };
 
         const alignMap = {
-            "Left": jimp.HORIZONTAL_ALIGN_LEFT,
-            "Center": jimp.HORIZONTAL_ALIGN_CENTER,
-            "Right": jimp.HORIZONTAL_ALIGN_RIGHT,
-            "Top": jimp.VERTICAL_ALIGN_TOP,
-            "Middle": jimp.VERTICAL_ALIGN_MIDDLE,
-            "Bottom": jimp.VERTICAL_ALIGN_BOTTOM
+            "Left": Jimp.HORIZONTAL_ALIGN_LEFT,
+            "Center": Jimp.HORIZONTAL_ALIGN_CENTER,
+            "Right": Jimp.HORIZONTAL_ALIGN_RIGHT,
+            "Top": Jimp.VERTICAL_ALIGN_TOP,
+            "Middle": Jimp.VERTICAL_ALIGN_MIDDLE,
+            "Bottom": Jimp.VERTICAL_ALIGN_BOTTOM
         };
 
         if (!isImage(input)) {
@@ -113,7 +113,7 @@ class ContainImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -123,16 +123,16 @@ class ContainImage extends Operation {
             image.contain(width, height, alignMap[hAlign] | alignMap[vAlign], resizeMap[alg]);
 
             if (opaqueBg) {
-                const newImage = await jimp.read(width, height, 0x000000FF);
+                const newImage = await Jimp.read(width, height, 0x000000FF);
                 newImage.blit(image, 0, 0);
                 image = newImage;
             }
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/ConvertImageFormat.mjs

@@ -8,7 +8,7 @@ import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Convert Image Format operation
@@ -76,19 +76,19 @@ class ConvertImageFormat extends Operation {
     async run(input, args) {
         const [format, jpegQuality, pngFilterType, pngDeflateLevel] = args;
         const formatMap = {
-            "JPEG": jimp.MIME_JPEG,
-            "PNG": jimp.MIME_PNG,
-            "BMP": jimp.MIME_BMP,
-            "TIFF": jimp.MIME_TIFF
+            "JPEG": Jimp.MIME_JPEG,
+            "PNG": Jimp.MIME_PNG,
+            "BMP": Jimp.MIME_BMP,
+            "TIFF": Jimp.MIME_TIFF
         };
 
         const pngFilterMap = {
-            "Auto": jimp.PNG_FILTER_AUTO,
-            "None": jimp.PNG_FILTER_NONE,
-            "Sub": jimp.PNG_FILTER_SUB,
-            "Up": jimp.PNG_FILTER_UP,
-            "Average": jimp.PNG_FILTER_AVERAGE,
-            "Paeth": jimp.PNG_FILTER_PATH
+            "Auto": Jimp.PNG_FILTER_AUTO,
+            "None": Jimp.PNG_FILTER_NONE,
+            "Sub": Jimp.PNG_FILTER_SUB,
+            "Up": Jimp.PNG_FILTER_UP,
+            "Average": Jimp.PNG_FILTER_AVERAGE,
+            "Paeth": Jimp.PNG_FILTER_PATH
         };
 
         const mime = formatMap[format];
@@ -98,7 +98,7 @@ class ConvertImageFormat extends Operation {
         }
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error opening image file. (${err})`);
         }

src/core/operations/ConvertLeetSpeak.mjs

@@ -0,0 +1,113 @@
+/**
+ * @author bartblaze []
+ * @copyright Crown Copyright 2025
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * Convert Leet Speak operation
+ */
+class ConvertLeetSpeak extends Operation {
+    /**
+     * ConvertLeetSpeak constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Convert Leet Speak";
+        this.module = "Default";
+        this.description = "Converts to and from Leet Speak";
+        this.infoURL = "https://wikipedia.org/wiki/Leet";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Direction",
+                type: "option",
+                value: ["To Leet Speak", "From Leet Speak"],
+                defaultIndex: 0
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const direction = args[0];
+        if (direction === "To Leet Speak") {
+            return input.replace(/[abcdefghijklmnopqrstuvwxyz]/gi, char => {
+                return toLeetMap[char.toLowerCase()] || char;
+            });
+        } else if (direction === "From Leet Speak") {
+            return input.replace(/[48cd3f6h1jklmn0pqr57uvwxyz]/g, char => {
+                return fromLeetMap[char] || char;
+            });
+        }
+    }
+}
+
+const toLeetMap = {
+    "a": "4",
+    "b": "b",
+    "c": "c",
+    "d": "d",
+    "e": "3",
+    "f": "f",
+    "g": "g",
+    "h": "h",
+    "i": "1",
+    "j": "j",
+    "k": "k",
+    "l": "l",
+    "m": "m",
+    "n": "n",
+    "o": "0",
+    "p": "p",
+    "q": "q",
+    "r": "r",
+    "s": "5",
+    "t": "7",
+    "u": "u",
+    "v": "v",
+    "w": "w",
+    "x": "x",
+    "y": "y",
+    "z": "z"
+};
+
+const fromLeetMap = {
+    "4": "a",
+    "b": "b",
+    "c": "c",
+    "d": "d",
+    "3": "e",
+    "f": "f",
+    "g": "g",
+    "h": "h",
+    "1": "i",
+    "j": "j",
+    "k": "k",
+    "l": "l",
+    "m": "m",
+    "n": "n",
+    "0": "o",
+    "p": "p",
+    "q": "q",
+    "r": "r",
+    "5": "s",
+    "7": "t",
+    "u": "u",
+    "v": "v",
+    "w": "w",
+    "x": "x",
+    "y": "y",
+    "z": "z"
+};
+
+export default ConvertLeetSpeak;
+

src/core/operations/CoverImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import jimp from "jimp/es/index.js";
 
 /**
  * Cover Image operation

src/core/operations/CropImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Crop Image operation
@@ -99,7 +99,7 @@ class CropImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -119,9 +119,9 @@ class CropImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/DESDecrypt.mjs

@@ -22,7 +22,7 @@ class DESDecrypt extends Operation {
 
         this.name = "DES Decrypt";
         this.module = "Ciphers";
-        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br>Triple DES uses a key length of 24 bytes (192 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
+        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
         this.infoURL = "https://wikipedia.org/wiki/Data_Encryption_Standard";
         this.inputType = "string";
         this.outputType = "string";
@@ -72,8 +72,7 @@ class DESDecrypt extends Operation {
         if (key.length !== 8) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-DES uses a key length of 8 bytes (64 bits).
-Triple DES uses a key length of 24 bytes (192 bits).`);
+DES uses a key length of 8 bytes (64 bits).`);
         }
         if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes

src/core/operations/DESEncrypt.mjs

@@ -22,7 +22,7 @@ class DESEncrypt extends Operation {
 
         this.name = "DES Encrypt";
         this.module = "Ciphers";
-        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br>Triple DES uses a key length of 24 bytes (192 bits).<br><br>You can generate a password-based key using one of the KDF operations.<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
+        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br><br>You can generate a password-based key using one of the KDF operations.<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
         this.infoURL = "https://wikipedia.org/wiki/Data_Encryption_Standard";
         this.inputType = "string";
         this.outputType = "string";
@@ -70,8 +70,7 @@ class DESEncrypt extends Operation {
         if (key.length !== 8) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-DES uses a key length of 8 bytes (64 bits).
-Triple DES uses a key length of 24 bytes (192 bits).`);
+DES uses a key length of 8 bytes (64 bits).`);
         }
         if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes

src/core/operations/DateTimeDelta.mjs

@@ -0,0 +1,107 @@
+/**
+ * @author tomgond [tom.gonda@gmail.com]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import moment from "moment-timezone";
+import {DATETIME_FORMATS, FORMAT_EXAMPLES} from "../lib/DateTime.mjs";
+
+/**
+ * DateTime Delta operation
+ */
+class DateTimeDelta extends Operation {
+
+    /**
+     * DateTimeDelta constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "DateTime Delta";
+        this.module = "Default";
+        this.description = "Calculates a new DateTime value given an input DateTime value and a time difference (delta) from the input DateTime value.";
+        this.inputType = "string";
+        this.outputType = "html";
+        this.args = [
+            {
+                "name": "Built in formats",
+                "type": "populateOption",
+                "value": DATETIME_FORMATS,
+                "target": 1
+            },
+            {
+                "name": "Input format string",
+                "type": "binaryString",
+                "value": "DD/MM/YYYY HH:mm:ss"
+            },
+            {
+                "name": "Time Operation",
+                "type": "option",
+                "value": ["Add", "Subtract"]
+            },
+            {
+                "name": "Days",
+                "type": "number",
+                "value": 0
+            },
+            {
+                "name": "Hours",
+                "type": "number",
+                "value": 0
+            },
+            {
+                "name": "Minutes",
+                "type": "number",
+                "value": 0
+            },
+            {
+                "name": "Seconds",
+                "type": "number",
+                "value": 0
+            }
+
+        ];
+    }
+
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const inputTimezone = "UTC";
+        const inputFormat = args[1];
+        const operationType = args[2];
+        const daysDelta = args[3];
+        const hoursDelta = args[4];
+        const minutesDelta = args[5];
+        const secondsDelta = args[6];
+        let date = "";
+
+        try {
+            date = moment.tz(input, inputFormat, inputTimezone);
+            if (!date || date.format() === "Invalid date") throw Error;
+        } catch (err) {
+            return `Invalid format.\n\n${FORMAT_EXAMPLES}`;
+        }
+        let newDate;
+        if (operationType === "Add") {
+            newDate = date.add(daysDelta, "days")
+                .add(hoursDelta, "hours")
+                .add(minutesDelta, "minutes")
+                .add(secondsDelta, "seconds");
+
+        } else {
+            newDate = date.add(-daysDelta, "days")
+                .add(-hoursDelta, "hours")
+                .add(-minutesDelta, "minutes")
+                .add(-secondsDelta, "seconds");
+        }
+        return newDate.tz(inputTimezone).format(inputFormat.replace(/[<>]/g, ""));
+    }
+}
+
+export default DateTimeDelta;

src/core/operations/DeriveEVPKey.mjs

@@ -62,11 +62,13 @@ class DeriveEVPKey extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        const passphrase = Utils.convertToByteString(args[0].string, args[0].option),
+        const passphrase = CryptoJS.enc.Latin1.parse(
+                Utils.convertToByteString(args[0].string, args[0].option)),
             keySize = args[1] / 32,
             iterations = args[2],
             hasher = args[3],
-            salt = Utils.convertToByteString(args[4].string, args[4].option),
+            salt = CryptoJS.enc.Latin1.parse(
+                Utils.convertToByteString(args[4].string, args[4].option)),
             key = CryptoJS.EvpKDF(passphrase, salt, { // lgtm [js/insufficient-password-hash]
                 keySize: keySize,
                 hasher: CryptoJS.algo[hasher],

src/core/operations/Diff.mjs

@@ -119,9 +119,9 @@ class Diff extends Operation {
 
         for (let i = 0; i < diff.length; i++) {
             if (diff[i].added) {
-                if (showAdded) output += "<span class='hl5'>" + Utils.escapeHtml(diff[i].value) + "</span>";
+                if (showAdded) output += "<ins>" + Utils.escapeHtml(diff[i].value) + "</ins>";
             } else if (diff[i].removed) {
-                if (showRemoved) output += "<span class='hl3'>" + Utils.escapeHtml(diff[i].value) + "</span>";
+                if (showRemoved) output += "<del>" + Utils.escapeHtml(diff[i].value) + "</del>";
             } else if (!showSubtraction) {
                 output += Utils.escapeHtml(diff[i].value);
             }

src/core/operations/DitherImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Image Dither operation
@@ -44,7 +44,7 @@ class DitherImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -55,9 +55,9 @@ class DitherImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/DropNthBytes.mjs

@@ -0,0 +1,79 @@
+/**
+ * @author Oshawk [oshawk@protonmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Drop nth bytes operation
+ */
+class DropNthBytes extends Operation {
+
+    /**
+     * DropNthBytes constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Drop nth bytes";
+        this.module = "Default";
+        this.description = "Drops every nth byte starting with a given byte.";
+        this.infoURL = "";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                name: "Drop every",
+                type: "number",
+                value: 4
+            },
+            {
+                name: "Starting at",
+                type: "number",
+                value: 0
+            },
+            {
+                name: "Apply to each line",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const n = args[0];
+        const start = args[1];
+        const eachLine = args[2];
+
+        if (parseInt(n, 10) !== n || n <= 0) {
+            throw new OperationError("'Drop every' must be a positive integer.");
+        }
+        if (parseInt(start, 10) !== start || start < 0) {
+            throw new OperationError("'Starting at' must be a positive or zero integer.");
+        }
+
+        let offset = 0;
+        const output = [];
+        for (let i = 0; i < input.length; i++) {
+            if (eachLine && input[i] === 0x0a) {
+                output.push(0x0a);
+                offset = i + 1;
+            } else if (i - offset < start || (i - (start + offset)) % n !== 0) {
+                output.push(input[i]);
+            }
+        }
+
+        return output;
+    }
+
+}
+
+export default DropNthBytes;

src/core/operations/ECDSASign.mjs

@@ -0,0 +1,107 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { fromHex } from "../lib/Hex.mjs";
+import { toBase64 } from "../lib/Base64.mjs";
+import r from "jsrsasign";
+
+/**
+ * ECDSA Sign operation
+ */
+class ECDSASign extends Operation {
+
+    /**
+     * ECDSASign constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "ECDSA Sign";
+        this.module = "Ciphers";
+        this.description = "Sign a plaintext message with a PEM encoded EC key.";
+        this.infoURL = "https://wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "ECDSA Private Key (PEM)",
+                type: "text",
+                value: "-----BEGIN EC PRIVATE KEY-----"
+            },
+            {
+                name: "Message Digest Algorithm",
+                type: "option",
+                value: [
+                    "SHA-256",
+                    "SHA-384",
+                    "SHA-512",
+                    "SHA-1",
+                    "MD5"
+                ]
+            },
+            {
+                name: "Output Format",
+                type: "option",
+                value: [
+                    "ASN.1 HEX",
+                    "P1363 HEX",
+                    "JSON Web Signature",
+                    "Raw JSON"
+                ]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [keyPem, mdAlgo, outputFormat] = args;
+
+        if (keyPem.replace("-----BEGIN EC PRIVATE KEY-----", "").length === 0) {
+            throw new OperationError("Please enter a private key.");
+        }
+
+        const internalAlgorithmName = mdAlgo.replace("-", "") + "withECDSA";
+        const sig = new r.KJUR.crypto.Signature({ alg: internalAlgorithmName });
+        const key = r.KEYUTIL.getKey(keyPem);
+        if (key.type !== "EC") {
+            throw new OperationError("Provided key is not an EC key.");
+        }
+        if (!key.isPrivate) {
+            throw new OperationError("Provided key is not a private key.");
+        }
+        sig.init(key);
+        const signatureASN1Hex = sig.signString(input);
+
+        let result;
+        switch (outputFormat) {
+            case "ASN.1 HEX":
+                result = signatureASN1Hex;
+                break;
+            case "P1363 HEX":
+                result = r.KJUR.crypto.ECDSA.asn1SigToConcatSig(signatureASN1Hex);
+                break;
+            case "JSON Web Signature":
+                result = r.KJUR.crypto.ECDSA.asn1SigToConcatSig(signatureASN1Hex);
+                result = toBase64(fromHex(result), "A-Za-z0-9-_");  // base64url
+                break;
+            case "Raw JSON": {
+                const signatureRS = r.KJUR.crypto.ECDSA.parseSigHexInHexRS(signatureASN1Hex);
+                result = JSON.stringify(signatureRS);
+                break;
+            }
+        }
+
+        return result;
+    }
+}
+
+export default ECDSASign;

src/core/operations/ECDSASignatureConversion.mjs

@@ -0,0 +1,146 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { fromBase64, toBase64 } from "../lib/Base64.mjs";
+import { fromHex, toHexFast } from "../lib/Hex.mjs";
+import r from "jsrsasign";
+
+/**
+ * ECDSA Sign operation
+ */
+class ECDSASignatureConversion extends Operation {
+
+    /**
+     * ECDSASignatureConversion constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "ECDSA Signature Conversion";
+        this.module = "Ciphers";
+        this.description = "Convert an ECDSA signature between hex, asn1 and json.";
+        this.infoURL = "https://wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Input Format",
+                type: "option",
+                value: [
+                    "Auto",
+                    "ASN.1 HEX",
+                    "P1363 HEX",
+                    "JSON Web Signature",
+                    "Raw JSON"
+                ]
+            },
+            {
+                name: "Output Format",
+                type: "option",
+                value: [
+                    "ASN.1 HEX",
+                    "P1363 HEX",
+                    "JSON Web Signature",
+                    "Raw JSON"
+                ]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let inputFormat = args[0];
+        const outputFormat = args[1];
+
+        // detect input format
+        let inputJson;
+        if (inputFormat === "Auto") {
+            try {
+                inputJson = JSON.parse(input);
+                if (typeof(inputJson) === "object") {
+                    inputFormat = "Raw JSON";
+                }
+            } catch {}
+        }
+
+        if (inputFormat === "Auto") {
+            const hexRegex = /^[a-f\d]{2,}$/gi;
+            if (hexRegex.test(input)) {
+                if (input.substring(0, 2) === "30" && r.ASN1HEX.isASN1HEX(input)) {
+                    inputFormat = "ASN.1 HEX";
+                } else {
+                    inputFormat = "P1363 HEX";
+                }
+            }
+        }
+
+        let inputBase64;
+        if (inputFormat === "Auto") {
+            try {
+                inputBase64 = fromBase64(input, "A-Za-z0-9-_", false);
+                inputFormat = "JSON Web Signature";
+            } catch {}
+        }
+
+        // convert input to ASN.1 hex
+        let signatureASN1Hex;
+        switch (inputFormat) {
+            case "Auto":
+                throw new OperationError("Signature format could not be detected");
+            case "ASN.1 HEX":
+                signatureASN1Hex = input;
+                break;
+            case "P1363 HEX":
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.concatSigToASN1Sig(input);
+                break;
+            case "JSON Web Signature":
+                if (!inputBase64) inputBase64 = fromBase64(input, "A-Za-z0-9-_");
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.concatSigToASN1Sig(toHexFast(inputBase64));
+                break;
+            case "Raw JSON": {
+                if (!inputJson) inputJson = JSON.parse(input);
+                if (!inputJson.r) {
+                    throw new OperationError('No "r" value in the signature JSON');
+                }
+                if (!inputJson.s) {
+                    throw new OperationError('No "s" value in the signature JSON');
+                }
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.hexRSSigToASN1Sig(inputJson.r, inputJson.s);
+                break;
+            }
+        }
+
+        // convert ASN.1 hex to output format
+        let result;
+        switch (outputFormat) {
+            case "ASN.1 HEX":
+                result = signatureASN1Hex;
+                break;
+            case "P1363 HEX":
+                result = r.KJUR.crypto.ECDSA.asn1SigToConcatSig(signatureASN1Hex);
+                break;
+            case "JSON Web Signature":
+                result = r.KJUR.crypto.ECDSA.asn1SigToConcatSig(signatureASN1Hex);
+                result = toBase64(fromHex(result), "A-Za-z0-9-_");  // base64url
+                break;
+            case "Raw JSON": {
+                const signatureRS = r.KJUR.crypto.ECDSA.parseSigHexInHexRS(signatureASN1Hex);
+                result = JSON.stringify(signatureRS);
+                break;
+            }
+        }
+
+        return result;
+    }
+}
+
+export default ECDSASignatureConversion;

src/core/operations/ECDSAVerify.mjs

@@ -0,0 +1,154 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { fromBase64 } from "../lib/Base64.mjs";
+import { toHexFast } from "../lib/Hex.mjs";
+import r from "jsrsasign";
+
+/**
+ * ECDSA Verify operation
+ */
+class ECDSAVerify extends Operation {
+
+    /**
+     * ECDSAVerify constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "ECDSA Verify";
+        this.module = "Ciphers";
+        this.description = "Verify a message against a signature and a public PEM encoded EC key.";
+        this.infoURL = "https://wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Input Format",
+                type: "option",
+                value: [
+                    "Auto",
+                    "ASN.1 HEX",
+                    "P1363 HEX",
+                    "JSON Web Signature",
+                    "Raw JSON"
+                ]
+            },
+            {
+                name: "Message Digest Algorithm",
+                type: "option",
+                value: [
+                    "SHA-256",
+                    "SHA-384",
+                    "SHA-512",
+                    "SHA-1",
+                    "MD5"
+                ]
+            },
+            {
+                name: "ECDSA Public Key (PEM)",
+                type: "text",
+                value: "-----BEGIN PUBLIC KEY-----"
+            },
+            {
+                name: "Message",
+                type: "text",
+                value: ""
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let inputFormat = args[0];
+        const [, mdAlgo, keyPem, msg] = args;
+
+        if (keyPem.replace("-----BEGIN PUBLIC KEY-----", "").length === 0) {
+            throw new OperationError("Please enter a public key.");
+        }
+
+        // detect input format
+        let inputJson;
+        if (inputFormat === "Auto") {
+            try {
+                inputJson = JSON.parse(input);
+                if (typeof(inputJson) === "object") {
+                    inputFormat = "Raw JSON";
+                }
+            } catch {}
+        }
+
+        if (inputFormat === "Auto") {
+            const hexRegex = /^[a-f\d]{2,}$/gi;
+            if (hexRegex.test(input)) {
+                if (input.substring(0, 2) === "30" && r.ASN1HEX.isASN1HEX(input)) {
+                    inputFormat = "ASN.1 HEX";
+                } else {
+                    inputFormat = "P1363 HEX";
+                }
+            }
+        }
+
+        let inputBase64;
+        if (inputFormat === "Auto") {
+            try {
+                inputBase64 = fromBase64(input, "A-Za-z0-9-_", false);
+                inputFormat = "JSON Web Signature";
+            } catch {}
+        }
+
+        // convert to ASN.1 signature
+        let signatureASN1Hex;
+        switch (inputFormat) {
+            case "Auto":
+                throw new OperationError("Signature format could not be detected");
+            case "ASN.1 HEX":
+                signatureASN1Hex = input;
+                break;
+            case "P1363 HEX":
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.concatSigToASN1Sig(input);
+                break;
+            case "JSON Web Signature":
+                if (!inputBase64) inputBase64 = fromBase64(input, "A-Za-z0-9-_");
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.concatSigToASN1Sig(toHexFast(inputBase64));
+                break;
+            case "Raw JSON": {
+                if (!inputJson) inputJson = JSON.parse(input);
+                if (!inputJson.r) {
+                    throw new OperationError('No "r" value in the signature JSON');
+                }
+                if (!inputJson.s) {
+                    throw new OperationError('No "s" value in the signature JSON');
+                }
+                signatureASN1Hex = r.KJUR.crypto.ECDSA.hexRSSigToASN1Sig(inputJson.r, inputJson.s);
+                break;
+            }
+        }
+
+        // verify signature
+        const internalAlgorithmName = mdAlgo.replace("-", "") + "withECDSA";
+        const sig = new r.KJUR.crypto.Signature({ alg: internalAlgorithmName });
+        const key = r.KEYUTIL.getKey(keyPem);
+        if (key.type !== "EC") {
+            throw new OperationError("Provided key is not an EC key.");
+        }
+        if (!key.isPublic) {
+            throw new OperationError("Provided key is not a public key.");
+        }
+        sig.init(key);
+        sig.updateString(msg);
+        const result = sig.verify(signatureASN1Hex);
+        return result ? "Verified OK" : "Verification Failure";
+    }
+}
+
+export default ECDSAVerify;

src/core/operations/ExtractDomains.mjs

@@ -5,7 +5,7 @@
  */
 
 import Operation from "../Operation.mjs";
-import { search, DOMAIN_REGEX } from "../lib/Extract.mjs";
+import { search, DOMAIN_REGEX, DMARC_DOMAIN_REGEX } from "../lib/Extract.mjs";
 import { caseInsensitiveSort } from "../lib/Sort.mjs";
 
 /**
@@ -39,6 +39,11 @@ class ExtractDomains extends Operation {
                 name: "Unique",
                 type: "boolean",
                 value: false
+            },
+            {
+                name: "Underscore (DMARC, DKIM, etc)",
+                type: "boolean",
+                value: false
             }
         ];
     }
@@ -49,11 +54,11 @@ class ExtractDomains extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        const [displayTotal, sort, unique] = args;
+        const [displayTotal, sort, unique, dmarc] = args;
 
         const results = search(
             input,
-            DOMAIN_REGEX,
+            dmarc ? DMARC_DOMAIN_REGEX : DOMAIN_REGEX,
             null,
             sort ? caseInsensitiveSort : null,
             unique

src/core/operations/ExtractHashes.mjs

@@ -0,0 +1,84 @@
+/**
+ * @author mshwed [m@ttshwed.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import { search } from "../lib/Extract.mjs";
+
+/**
+ * Extract Hash Values operation
+ */
+class ExtractHashes extends Operation {
+
+    /**
+     * ExtractHashValues constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Extract hashes";
+        this.module = "Regex";
+        this.description = "Extracts potential hashes based on hash character length";
+        this.infoURL = "https://wikipedia.org/wiki/Comparison_of_cryptographic_hash_functions";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Hash character length",
+                type: "number",
+                value: 40
+            },
+            {
+                name: "All hashes",
+                type: "boolean",
+                value: false
+            },
+            {
+                name: "Display Total",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const results = [];
+        let hashCount = 0;
+
+        const [hashLength, searchAllHashes, showDisplayTotal] = args;
+
+        // Convert character length to bit length
+        let hashBitLengths = [(hashLength / 2) * 8];
+
+        if (searchAllHashes) hashBitLengths = [4, 8, 16, 32, 64, 128, 160, 192, 224, 256, 320, 384, 512, 1024];
+
+        for (const hashBitLength of hashBitLengths) {
+            // Convert bit length to character length
+            const hashCharacterLength = (hashBitLength / 8) * 2;
+
+            const regex = new RegExp(`(\\b|^)[a-f0-9]{${hashCharacterLength}}(\\b|$)`, "g");
+            const searchResults = search(input, regex, null, false);
+
+            hashCount += searchResults.length;
+            results.push(...searchResults);
+        }
+
+        let output = "";
+        if (showDisplayTotal) {
+            output = `Total Results: ${hashCount}\n\n`;
+        }
+
+        output = output + results.join("\n");
+        return output;
+    }
+
+}
+
+export default ExtractHashes;

src/core/operations/ExtractLSB.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import Utils from "../Utils.mjs";
 import { fromBinary } from "../lib/Binary.mjs";
 import { isImage } from "../lib/FileType.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Extract LSB operation
@@ -73,7 +73,7 @@ class ExtractLSB extends Operation {
         const bit = 7 - args.pop(),
             pixelOrder = args.pop(),
             colours = args.filter(option => option !== "").map(option => COLOUR_OPTIONS.indexOf(option)),
-            parsedImage = await jimp.read(input),
+            parsedImage = await Jimp.read(input),
             width = parsedImage.bitmap.width,
             height = parsedImage.bitmap.height,
             rgba = parsedImage.bitmap.data;

src/core/operations/ExtractRGBA.mjs

@@ -7,7 +7,7 @@
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 import {RGBA_DELIM_OPTIONS} from "../lib/Delim.mjs";
 
@@ -52,7 +52,7 @@ class ExtractRGBA extends Operation {
 
         const delimiter = args[0],
             includeAlpha = args[1],
-            parsedImage = await jimp.read(input);
+            parsedImage = await Jimp.read(input);
 
         let bitmap = parsedImage.bitmap.data;
         bitmap = includeAlpha ? bitmap : bitmap.filter((val, idx) => idx % 4 !== 3);

src/core/operations/FangURL.mjs

@@ -0,0 +1,78 @@
+/**
+ * @author arnydo [github@arnydo.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * FangURL operation
+ */
+class FangURL extends Operation {
+
+    /**
+     * FangURL constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Fang URL";
+        this.module = "Default";
+        this.description = "Takes a 'Defanged' Universal Resource Locator (URL) and 'Fangs' it. Meaning, it removes the alterations (defanged) that render it useless so that it can be used again.";
+        this.infoURL = "https://isc.sans.edu/forums/diary/Defang+all+the+things/22744/";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Restore [.]",
+                type: "boolean",
+                value: true
+            },
+            {
+                name: "Restore hxxp",
+                type: "boolean",
+                value: true
+            },
+            {
+                name: "Restore ://",
+                type: "boolean",
+                value: true
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [dots, http, slashes] = args;
+
+        input = fangURL(input, dots, http, slashes);
+
+        return input;
+    }
+
+}
+
+
+/**
+ * Defangs a given URL
+ *
+ * @param {string} url
+ * @param {boolean} dots
+ * @param {boolean} http
+ * @param {boolean} slashes
+ * @returns {string}
+ */
+function fangURL(url, dots, http, slashes) {
+    if (dots) url = url.replace(/\[\.\]/g, ".");
+    if (http) url = url.replace(/hxxp/g, "http");
+    if (slashes) url = url.replace(/\[:\/\/\]/g, "://");
+
+    return url;
+}
+
+export default FangURL;

src/core/operations/FernetDecrypt.mjs

@@ -0,0 +1,63 @@
+/**
+ * @author Karsten Silkenbäumer [github.com/kassi]
+ * @copyright Karsten Silkenbäumer 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import fernet from "fernet";
+
+/**
+ * FernetDecrypt operation
+ */
+class FernetDecrypt extends Operation {
+    /**
+     * FernetDecrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Fernet Decrypt";
+        this.module = "Default";
+        this.description = "Fernet is a symmetric encryption method which makes sure that the message encrypted cannot be manipulated/read without the key. It uses URL safe encoding for the keys. Fernet uses 128-bit AES in CBC mode and PKCS7 padding, with HMAC using SHA256 for authentication. The IV is created from os.random().<br><br><b>Key:</b> The key must be 32 bytes (256 bits) encoded with Base64.";
+        this.infoURL = "https://asecuritysite.com/encryption/fer";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "string",
+                "value": ""
+            },
+        ];
+        this.patterns = [
+            {
+                match: "^[A-Z\\d\\-_=]{20,}$",
+                flags: "i",
+                args: []
+            },
+        ];
+    }
+    /**
+     * @param {String} input
+     * @param {Object[]} args
+     * @returns {String}
+     */
+    run(input, args) {
+        const [secretInput] = args;
+        try {
+            const secret = new fernet.Secret(secretInput);
+            const token = new fernet.Token({
+                secret: secret,
+                token: input,
+                ttl: 0
+            });
+            return token.decode();
+        } catch (err) {
+            throw new OperationError(err);
+        }
+    }
+}
+
+export default FernetDecrypt;

src/core/operations/FernetEncrypt.mjs

@@ -0,0 +1,54 @@
+/**
+ * @author Karsten Silkenbäumer [github.com/kassi]
+ * @copyright Karsten Silkenbäumer 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import fernet from "fernet";
+
+/**
+ * FernetEncrypt operation
+ */
+class FernetEncrypt extends Operation {
+    /**
+     * FernetEncrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Fernet Encrypt";
+        this.module = "Default";
+        this.description = "Fernet is a symmetric encryption method which makes sure that the message encrypted cannot be manipulated/read without the key. It uses URL safe encoding for the keys. Fernet uses 128-bit AES in CBC mode and PKCS7 padding, with HMAC using SHA256 for authentication. The IV is created from os.random().<br><br><b>Key:</b> The key must be 32 bytes (256 bits) encoded with Base64.";
+        this.infoURL = "https://asecuritysite.com/encryption/fer";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "string",
+                "value": ""
+            },
+        ];
+    }
+    /**
+     * @param {String} input
+     * @param {Object[]} args
+     * @returns {String}
+     */
+    run(input, args) {
+        const [secretInput] = args;
+        try {
+            const secret = new fernet.Secret(secretInput);
+            const token = new fernet.Token({
+                secret: secret,
+            });
+            return token.encode(input);
+        } catch (err) {
+            throw new OperationError(err);
+        }
+    }
+}
+
+export default FernetEncrypt;

src/core/operations/FileTree.mjs

@@ -0,0 +1,94 @@
+/**
+ * @author sw5678
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import {INPUT_DELIM_OPTIONS} from "../lib/Delim.mjs";
+
+/**
+ * Unique operation
+ */
+class FileTree extends Operation {
+
+    /**
+     * Unique constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "File Tree";
+        this.module = "Default";
+        this.description = "Creates a file tree from a list of file paths (similar to the tree command in Linux)";
+        this.infoURL = "https://wikipedia.org/wiki/Tree_(command)";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "File Path Delimiter",
+                type: "binaryString",
+                value: "/"
+            },
+            {
+                name: "Delimiter",
+                type: "option",
+                value: INPUT_DELIM_OPTIONS
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+
+        // Set up arrow and pipe for nice output display
+        const ARROW = "|---";
+        const PIPE = "|   ";
+
+        // Get args from input
+        const fileDelim = args[0];
+        const entryDelim = Utils.charRep(args[1]);
+
+        // Store path to print
+        const completedList = [];
+        const printList = [];
+
+        // Loop through all entries
+        const filePaths = input.split(entryDelim).unique().sort();
+        for (let i = 0; i < filePaths.length; i++) {
+            // Split by file delimiter
+            let path = filePaths[i].split(fileDelim);
+
+            if (path[0] === "") {
+                path = path.slice(1, path.length);
+            }
+
+            for (let j = 0; j < path.length; j++) {
+                let printLine;
+                let key;
+                if (j === 0) {
+                    printLine = path[j];
+                    key = path[j];
+                } else {
+                    printLine = PIPE.repeat(j-1) + ARROW + path[j];
+                    key = path.slice(0, j+1).join("/");
+                }
+
+                // Check to see we have already added that path
+                if (!completedList.includes(key)) {
+                    completedList.push(key);
+                    printList.push(printLine);
+                }
+            }
+        }
+        return printList.join("\n");
+    }
+
+}
+
+export default FileTree;

src/core/operations/FlipImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Flip Image operation
@@ -51,7 +51,7 @@ class FlipImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -69,9 +69,9 @@ class FlipImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/FromBase58.mjs

@@ -60,7 +60,7 @@ class FromBase58 extends Operation {
     run(input, args) {
         let alphabet = args[0] || ALPHABET_OPTIONS[0].value;
         const removeNonAlphaChars = args[1] === undefined ? true : args[1],
-            result = [0];
+            result = [];
 
         alphabet = Utils.expandAlphRange(alphabet).join("");
 
@@ -87,11 +87,9 @@ class FromBase58 extends Operation {
                 }
             }
 
-            let carry = result[0] * 58 + index;
-            result[0] = carry & 0xFF;
-            carry = carry >> 8;
+            let carry = index;
 
-            for (let i = 1; i < result.length; i++) {
+            for (let i = 0; i < result.length; i++) {
                 carry += result[i] * 58;
                 result[i] = carry & 0xFF;
                 carry = carry >> 8;

src/core/operations/FromBase92.mjs

@@ -0,0 +1,55 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import { base92Ord } from "../lib/Base92.mjs";
+import Operation from "../Operation.mjs";
+
+/**
+ * From Base92 operation
+ */
+class FromBase92 extends Operation {
+    /**
+     * FromBase92 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "From Base92";
+        this.module = "Default";
+        this.description = "Base92 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.";
+        this.infoURL = "https://wikipedia.org/wiki/List_of_numeral_systems";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const res = [];
+        let bitString = "";
+
+        for (let i = 0; i < input.length; i += 2) {
+            if (i + 1 !== input.length) {
+                const x = base92Ord(input[i]) * 91 + base92Ord(input[i + 1]);
+                bitString += x.toString(2).padStart(13, "0");
+            } else {
+                const x = base92Ord(input[i]);
+                bitString += x.toString(2).padStart(6, "0");
+            }
+            while (bitString.length >= 8) {
+                res.push(parseInt(bitString.slice(0, 8), 2));
+                bitString = bitString.slice(8);
+            }
+        }
+
+        return res;
+    }
+}
+
+export default FromBase92;

src/core/operations/FromFloat.mjs

@@ -0,0 +1,78 @@
+/**
+ * @author tcode2k16 [tcode2k16@gmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import ieee754 from "ieee754";
+import {DELIM_OPTIONS} from "../lib/Delim.mjs";
+
+/**
+ * From Float operation
+ */
+class FromFloat extends Operation {
+
+    /**
+     * FromFloat constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "From Float";
+        this.module = "Default";
+        this.description = "Convert from IEEE754 Floating Point Numbers";
+        this.infoURL = "https://wikipedia.org/wiki/IEEE_754";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                "name": "Endianness",
+                "type": "option",
+                "value": [
+                    "Big Endian",
+                    "Little Endian"
+                ]
+            },
+            {
+                "name": "Size",
+                "type": "option",
+                "value": [
+                    "Float (4 bytes)",
+                    "Double (8 bytes)"
+                ]
+            },
+            {
+                "name": "Delimiter",
+                "type": "option",
+                "value": DELIM_OPTIONS
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        if (input.length === 0) return [];
+
+        const [endianness, size, delimiterName] = args;
+        const delim = Utils.charRep(delimiterName || "Space");
+        const byteSize = size === "Double (8 bytes)" ? 8 : 4;
+        const isLE = endianness === "Little Endian";
+        const mLen = byteSize === 4 ? 23 : 52;
+        const floats = input.split(delim);
+
+        const output = new Array(floats.length*byteSize);
+        for (let i = 0; i < floats.length; i++) {
+            ieee754.write(output, parseFloat(floats[i]), i*byteSize, isLE, mLen, byteSize);
+        }
+        return output;
+    }
+
+}
+
+export default FromFloat;

src/core/operations/FromModhex.mjs

@@ -0,0 +1,84 @@
+/**
+ * @author linuxgemini [ilteris@asenkron.com.tr]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import { FROM_MODHEX_DELIM_OPTIONS, fromModhex } from "../lib/Modhex.mjs";
+
+/**
+ * From Modhex operation
+ */
+class FromModhex extends Operation {
+
+    /**
+     * FromModhex constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "From Modhex";
+        this.module = "Default";
+        this.description = "Converts a modhex byte string back into its raw value.";
+        this.infoURL = "https://en.wikipedia.org/wiki/YubiKey#ModHex";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                name: "Delimiter",
+                type: "option",
+                value: FROM_MODHEX_DELIM_OPTIONS
+            }
+        ];
+        this.checks = [
+            {
+                pattern: "^(?:[cbdefghijklnrtuv]{2})+$",
+                flags: "i",
+                args: ["None"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?: [cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["Space"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?:,[cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["Comma"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?:;[cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["Semi-colon"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?::[cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["Colon"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?:\\n[cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["Line feed"]
+            },
+            {
+                pattern: "^[cbdefghijklnrtuv]{2}(?:\\r\\n[cbdefghijklnrtuv]{2})*$",
+                flags: "i",
+                args: ["CRLF"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const delim = args[0] || "Auto";
+        return fromModhex(input, delim, 2);
+    }
+}
+
+export default FromModhex;

src/core/operations/GOSTDecrypt.mjs

@@ -55,22 +55,19 @@ class GOSTDecrypt extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -100,14 +97,30 @@ class GOSTDecrypt extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ivObj, inputType, outputType, version, length, sBox, blockMode, keyMeshing, padding] = args;
+        const [keyObj, ivObj, inputType, outputType, version, sBox, blockMode, keyMeshing, padding] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const iv = toHexFast(Utils.convertToByteArray(ivObj.string, ivObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GOSTEncrypt.mjs

@@ -55,22 +55,19 @@ class GOSTEncrypt extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -100,14 +97,30 @@ class GOSTEncrypt extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ivObj, inputType, outputType, version, length, sBox, blockMode, keyMeshing, padding] = args;
+        const [keyObj, ivObj, inputType, outputType, version, sBox, blockMode, keyMeshing, padding] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const iv = toHexFast(Utils.convertToByteArray(ivObj.string, ivObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GOSTKeyUnwrap.mjs

@@ -55,22 +55,19 @@ class GOSTKeyUnwrap extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -90,14 +87,30 @@ class GOSTKeyUnwrap extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ukmObj, inputType, outputType, version, length, sBox, keyWrapping] = args;
+        const [keyObj, ukmObj, inputType, outputType, version, sBox, keyWrapping] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const ukm = toHexFast(Utils.convertToByteArray(ukmObj.string, ukmObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GOSTKeyWrap.mjs

@@ -55,22 +55,19 @@ class GOSTKeyWrap extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -90,14 +87,30 @@ class GOSTKeyWrap extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ukmObj, inputType, outputType, version, length, sBox, keyWrapping] = args;
+        const [keyObj, ukmObj, inputType, outputType, version, sBox, keyWrapping] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const ukm = toHexFast(Utils.convertToByteArray(ukmObj.string, ukmObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GOSTSign.mjs

@@ -55,22 +55,19 @@ class GOSTSign extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -93,14 +90,30 @@ class GOSTSign extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ivObj, inputType, outputType, version, length, sBox, macLength] = args;
+        const [keyObj, ivObj, inputType, outputType, version, sBox, macLength] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const iv = toHexFast(Utils.convertToByteArray(ivObj.string, ivObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GOSTVerify.mjs

@@ -56,22 +56,19 @@ class GOSTVerify extends Operation {
                 type: "argSelector",
                 value: [
                     {
-                        name: "GOST 28147 (Magma, 1989)",
-                        off: [5],
-                        on: [6]
+                        name: "GOST 28147 (1989)",
+                        on: [5]
+                    },
+                    {
+                        name: "GOST R 34.12 (Magma, 2015)",
+                        off: [5]
                     },
                     {
                         name: "GOST R 34.12 (Kuznyechik, 2015)",
-                        on: [5],
-                        off: [6]
+                        off: [5]
                     }
                 ]
             },
-            {
-                name: "Block length",
-                type: "option",
-                value: ["64", "128"]
-            },
             {
                 name: "sBox",
                 type: "option",
@@ -86,15 +83,31 @@ class GOSTVerify extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [keyObj, ivObj, macObj, inputType, version, length, sBox] = args;
+        const [keyObj, ivObj, macObj, inputType, version, sBox] = args;
 
         const key = toHexFast(Utils.convertToByteArray(keyObj.string, keyObj.option));
         const iv = toHexFast(Utils.convertToByteArray(ivObj.string, ivObj.option));
         const mac = toHexFast(Utils.convertToByteArray(macObj.string, macObj.option));
         input = inputType === "Hex" ? input : toHexFast(Utils.strToArrayBuffer(input));
 
-        const versionNum = version === "GOST 28147 (Magma, 1989)" ? 1989 : 2015;
-        const blockLength = versionNum === 1989 ? 64 : parseInt(length, 10);
+        let blockLength, versionNum;
+        switch (version) {
+            case "GOST 28147 (1989)":
+                versionNum = 1989;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Magma, 2015)":
+                versionNum = 2015;
+                blockLength = 64;
+                break;
+            case "GOST R 34.12 (Kuznyechik, 2015)":
+                versionNum = 2015;
+                blockLength = 128;
+                break;
+            default:
+                throw new OperationError(`Unknown algorithm version: ${version}`);
+        }
+
         const sBoxVal = versionNum === 1989 ? sBox : null;
 
         const algorithm = {

src/core/operations/GenerateECDSAKeyPair.mjs

@@ -0,0 +1,102 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import { cryptNotice } from "../lib/Crypt.mjs";
+import r from "jsrsasign";
+
+/**
+ * Generate ECDSA Key Pair operation
+ */
+class GenerateECDSAKeyPair extends Operation {
+
+    /**
+     * GenerateECDSAKeyPair constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Generate ECDSA Key Pair";
+        this.module = "Ciphers";
+        this.description = `Generate an ECDSA key pair with a given Curve.<br><br>${cryptNotice}`;
+        this.infoURL = "https://wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Elliptic Curve",
+                type: "option",
+                value: [
+                    "P-256",
+                    "P-384",
+                    "P-521"
+                ]
+            },
+            {
+                name: "Output Format",
+                type: "option",
+                value: [
+                    "PEM",
+                    "DER",
+                    "JWK"
+                ]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    async run(input, args) {
+        const [curveName, outputFormat] = args;
+
+        return new Promise((resolve, reject) => {
+            let internalCurveName;
+            switch (curveName) {
+                case "P-256":
+                    internalCurveName = "secp256r1";
+                    break;
+                case "P-384":
+                    internalCurveName = "secp384r1";
+                    break;
+                case "P-521":
+                    internalCurveName = "secp521r1";
+                    break;
+            }
+            const keyPair = r.KEYUTIL.generateKeypair("EC", internalCurveName);
+
+            let pubKey;
+            let privKey;
+            let result;
+            switch (outputFormat) {
+                case "PEM":
+                    pubKey = r.KEYUTIL.getPEM(keyPair.pubKeyObj).replace(/\r/g, "");
+                    privKey = r.KEYUTIL.getPEM(keyPair.prvKeyObj, "PKCS8PRV").replace(/\r/g, "");
+                    result = pubKey + "\n" + privKey;
+                    break;
+                case "DER":
+                    result = keyPair.prvKeyObj.prvKeyHex;
+                    break;
+                case "JWK":
+                    pubKey = r.KEYUTIL.getJWKFromKey(keyPair.pubKeyObj);
+                    pubKey.key_ops = ["verify"]; // eslint-disable-line camelcase
+                    pubKey.kid = "PublicKey";
+                    privKey = r.KEYUTIL.getJWKFromKey(keyPair.prvKeyObj);
+                    privKey.key_ops = ["sign"]; // eslint-disable-line camelcase
+                    privKey.kid = "PrivateKey";
+                    result = JSON.stringify({keys: [privKey, pubKey]}, null, 4);
+                    break;
+            }
+
+            resolve(result);
+        });
+    }
+
+}
+
+export default GenerateECDSAKeyPair;

src/core/operations/GenerateHOTP.mjs

@@ -5,16 +5,14 @@
  */
 
 import Operation from "../Operation.mjs";
-import otp from "otp";
-import ToBase32 from "./ToBase32.mjs";
+import * as OTPAuth from "otpauth";
 
 /**
  * Generate HOTP operation
  */
 class GenerateHOTP extends Operation {
-
     /**
-     * GenerateHOTP constructor
+     *
      */
     constructor() {
         super();
@@ -31,11 +29,6 @@ class GenerateHOTP extends Operation {
                 "type": "string",
                 "value": ""
             },
-            {
-                "name": "Key size",
-                "type": "number",
-                "value": 32
-            },
             {
                 "name": "Code length",
                 "type": "number",
@@ -50,21 +43,26 @@ class GenerateHOTP extends Operation {
     }
 
     /**
-     * @param {ArrayBuffer} input
-     * @param {Object[]} args
-     * @returns {string}
+     *
      */
     run(input, args) {
-        const otpObj = otp({
-            name: args[0],
-            keySize: args[1],
-            codeLength: args[2],
-            secret: (new ToBase32).run(input, []).split("=")[0],
-        });
-        const counter = args[3];
-        return `URI: ${otpObj.hotpURL}\n\nPassword: ${otpObj.hotp(counter)}`;
-    }
+        const secretStr = new TextDecoder("utf-8").decode(input).trim();
+        const secret = secretStr ? secretStr.toUpperCase().replace(/\s+/g, "") : "";
 
+        const hotp = new OTPAuth.HOTP({
+            issuer: "",
+            label: args[0],
+            algorithm: "SHA1",
+            digits: args[1],
+            counter: args[2],
+            secret: OTPAuth.Secret.fromBase32(secret)
+        });
+
+        const uri = hotp.toString();
+        const code = hotp.generate();
+
+        return `URI: ${uri}\n\nPassword: ${code}`;
+    }
 }
 
 export default GenerateHOTP;

src/core/operations/GenerateImage.mjs

@@ -10,7 +10,7 @@ import Utils from "../Utils.mjs";
 import {isImage} from "../lib/FileType.mjs";
 import {toBase64} from "../lib/Base64.mjs";
 import {isWorkerEnvironment} from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Generate Image operation
@@ -81,7 +81,7 @@ class GenerateImage extends Operation {
         }
 
         const height = Math.ceil(input.length / bytesPerPixel / width);
-        const image = await new jimp(width, height, (err, image) => {});
+        const image = await new Jimp(width, height, (err, image) => {});
 
         if (isWorkerEnvironment())
             self.sendStatusMessage("Generating image from data...");
@@ -95,7 +95,7 @@ class GenerateImage extends Operation {
                     const y = Math.floor(index / width);
 
                     const value = curByte[k] === "0" ? 0xFF : 0x00;
-                    const pixel = jimp.rgbaToInt(value, value, value, 0xFF);
+                    const pixel = Jimp.rgbaToInt(value, value, value, 0xFF);
                     image.setPixelColor(pixel, x, y);
                 }
             }
@@ -139,7 +139,7 @@ class GenerateImage extends Operation {
                 }
 
                 try {
-                    const pixel = jimp.rgbaToInt(red, green, blue, alpha);
+                    const pixel = Jimp.rgbaToInt(red, green, blue, alpha);
                     image.setPixelColor(pixel, x, y);
                 } catch (err) {
                     throw new OperationError(`Error while generating image from pixel values. (${err})`);
@@ -151,11 +151,11 @@ class GenerateImage extends Operation {
             if (isWorkerEnvironment())
                 self.sendStatusMessage("Scaling image...");
 
-            image.scaleToFit(width*scale, height*scale, jimp.RESIZE_NEAREST_NEIGHBOR);
+            image.scaleToFit(width*scale, height*scale, Jimp.RESIZE_NEAREST_NEIGHBOR);
         }
 
         try {
-            const imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+            const imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             return imageBuffer.buffer;
         } catch (err) {
             throw new OperationError(`Error generating image. (${err})`);

src/core/operations/GenerateTOTP.mjs

@@ -5,20 +5,17 @@
  */
 
 import Operation from "../Operation.mjs";
-import otp from "otp";
-import ToBase32 from "./ToBase32.mjs";
+import * as OTPAuth from "otpauth";
 
 /**
  * Generate TOTP operation
  */
 class GenerateTOTP extends Operation {
-
     /**
-     * GenerateTOTP constructor
+     *
      */
     constructor() {
         super();
-
         this.name = "Generate TOTP";
         this.module = "Default";
         this.description = "The Time-based One-Time Password algorithm (TOTP) is an algorithm that computes a one-time password from a shared secret key and the current time. It has been adopted as Internet Engineering Task Force standard RFC 6238, is the cornerstone of Initiative For Open Authentication (OAUTH), and is used in a number of two-factor authentication systems. A TOTP is an HOTP where the counter is the current time.<br><br>Enter the secret as the input or leave it blank for a random secret to be generated. T0 and T1 are in seconds.";
@@ -31,11 +28,6 @@ class GenerateTOTP extends Operation {
                 "type": "string",
                 "value": ""
             },
-            {
-                "name": "Key size",
-                "type": "number",
-                "value": 32
-            },
             {
                 "name": "Code length",
                 "type": "number",
@@ -55,22 +47,27 @@ class GenerateTOTP extends Operation {
     }
 
     /**
-     * @param {ArrayBuffer} input
-     * @param {Object[]} args
-     * @returns {string}
+     *
      */
     run(input, args) {
-        const otpObj = otp({
-            name: args[0],
-            keySize: args[1],
-            codeLength: args[2],
-            secret: (new ToBase32).run(input, []).split("=")[0],
-            epoch: args[3],
-            timeSlice: args[4]
-        });
-        return `URI: ${otpObj.totpURL}\n\nPassword: ${otpObj.totp()}`;
-    }
+        const secretStr = new TextDecoder("utf-8").decode(input).trim();
+        const secret = secretStr ? secretStr.toUpperCase().replace(/\s+/g, "") : "";
 
+        const totp = new OTPAuth.TOTP({
+            issuer: "",
+            label: args[0],
+            algorithm: "SHA1",
+            digits: args[1],
+            period: args[3],
+            epoch: args[2] * 1000, // Convert seconds to milliseconds
+            secret: OTPAuth.Secret.fromBase32(secret)
+        });
+
+        const uri = totp.toString();
+        const code = totp.generate();
+
+        return `URI: ${uri}\n\nPassword: ${code}`;
+    }
 }
 
 export default GenerateTOTP;

src/core/operations/IPv6TransitionAddresses.mjs

@@ -0,0 +1,209 @@
+/**
+ * @author jb30795 [jb30795@proton.me]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * IPv6 Transition Addresses operation
+ */
+class IPv6TransitionAddresses extends Operation {
+
+    /**
+     * IPv6TransitionAddresses constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "IPv6 Transition Addresses";
+        this.module = "Default";
+        this.description = "Converts IPv4 addresses to their IPv6 Transition addresses. IPv6 Transition addresses can also be converted back into their original IPv4 address. MAC addresses can also be converted into the EUI-64 format, this can them be appended to your IPv6 /64 range to obtain a full /128 address.<br><br>Transition technologies enable translation between IPv4 and IPv6 addresses or tunneling to allow traffic to pass through the incompatible network, allowing the two standards to coexist.<br><br>Only /24 ranges and currently handled. Remove headers to easily copy out results.";
+        this.infoURL = "https://wikipedia.org/wiki/IPv6_transition_mechanism";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+	    {
+                "name": "Ignore ranges",
+                "type": "boolean",
+	        "value": true
+	    },
+            {
+                "name": "Remove headers",
+                "type": "boolean",
+                "value": false
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const XOR = {"0": "2", "1": "3", "2": "0", "3": "1", "4": "6", "5": "7", "6": "4", "7": "5", "8": "a", "9": "b", "a": "8", "b": "9", "c": "e", "d": "f", "e": "c", "f": "d"};
+
+        /**
+	 * Function to convert to hex
+	 */
+        function hexify(octet) {
+            return Number(octet).toString(16).padStart(2, "0");
+        }
+
+        /**
+	 * Function to convert Hex to Int
+	 */
+        function intify(hex) {
+            return parseInt(hex, 16);
+        }
+
+        /**
+	 * Function converts IPv4 to IPv6 Transtion address
+	 */
+        function ipTransition(input, range) {
+            let output = "";
+            const HEXIP = input.split(".");
+
+            /**
+	     * 6to4
+	     */
+            if (!args[1]) {
+                output += "6to4: ";
+            }
+            output += "2002:" + hexify(HEXIP[0]) + hexify(HEXIP[1]) + ":" + hexify(HEXIP[2]);
+            if (range) {
+                output += "00::/40\n";
+            } else {
+                output += hexify(HEXIP[3]) + "::/48\n";
+            }
+
+            /**
+	     * Mapped
+	     */
+            if (!args[1]) {
+                output += "IPv4 Mapped: ";
+            }
+            output += "::ffff:" + hexify(HEXIP[0]) + hexify(HEXIP[1]) + ":" + hexify(HEXIP[2]);
+            if (range) {
+                output += "00/120\n";
+            } else {
+                output += hexify(HEXIP[3]) + "\n";
+            }
+
+            /**
+	     * Translated
+	     */
+            if (!args[1]) {
+                output += "IPv4 Translated: ";
+            }
+            output += "::ffff:0:" + hexify(HEXIP[0]) + hexify(HEXIP[1]) + ":" + hexify(HEXIP[2]);
+            if (range) {
+                output += "00/120\n";
+            } else {
+                output += hexify(HEXIP[3]) + "\n";
+            }
+
+            /**
+	     * Nat64
+	     */
+            if (!args[1]) {
+                output += "Nat 64: ";
+            }
+            output += "64:ff9b::" + hexify(HEXIP[0]) + hexify(HEXIP[1]) + ":" + hexify(HEXIP[2]);
+            if (range) {
+                output += "00/120\n";
+            } else {
+                output += hexify(HEXIP[3]) + "\n";
+            }
+
+            return output;
+        }
+
+        /**
+	 * Convert MAC to EUI-64
+	 */
+        function macTransition(input) {
+            let output = "";
+            const MACPARTS = input.split(":");
+            if (!args[1]) {
+                output += "EUI-64 Interface ID: ";
+            }
+            const MAC = MACPARTS[0] + MACPARTS[1] + ":" + MACPARTS[2] + "ff:fe" + MACPARTS[3] + ":" + MACPARTS[4] + MACPARTS[5];
+            output += MAC.slice(0, 1) + XOR[MAC.slice(1, 2)] + MAC.slice(2);
+
+            return output;
+        }
+
+
+        /**
+	 * Convert IPv6 address to its original IPv4 or MAC address
+	 */
+        function unTransition(input) {
+            let output = "";
+            let hextets = "";
+
+            /**
+	     * 6to4
+	     */
+            if (input.startsWith("2002:")) {
+                if (!args[1]) {
+                    output += "IPv4: ";
+                }
+                output += String(intify(input.slice(5, 7))) + "." + String(intify(input.slice(7, 9)))+ "." + String(intify(input.slice(10, 12)))+ "." + String(intify(input.slice(12, 14))) + "\n";
+            } else if (input.startsWith("::ffff:") || input.startsWith("0000:0000:0000:0000:0000:ffff:") || input.startsWith("::ffff:0000:") || input.startsWith("0000:0000:0000:0000:ffff:0000:") || input.startsWith("64:ff9b::") || input.startsWith("0064:ff9b:0000:0000:0000:0000:")) {
+		/**
+		 * Mapped/Translated/Nat64
+		 */
+                hextets = /:([0-9a-z]{1,4}):[0-9a-z]{1,4}$/.exec(input)[1].padStart(4, "0") + /:([0-9a-z]{1,4})$/.exec(input)[1].padStart(4, "0");
+                if (!args[1]) {
+                    output += "IPv4: ";
+                }
+                output += intify(hextets.slice(-8, -7) +  hextets.slice(-7, -6)) + "." +intify(hextets.slice(-6, -5) +  hextets.slice(-5, -4)) + "." +intify(hextets.slice(-4, -3) +  hextets.slice(-3, -2)) + "." +intify(hextets.slice(-2, -1) +  hextets.slice(-1,)) + "\n";
+            } else if (input.slice(-12, -7).toUpperCase() === "FF:FE") {
+		/**
+		 * EUI-64
+		 */
+                if (!args[1]) {
+                    output += "Mac Address: ";
+                }
+                const MAC = (input.slice(-19, -17) + ":" + input.slice(-17, -15) + ":" + input.slice(-14, -12) + ":" + input.slice(-7, -5) + ":" + input.slice(-4, -2) + ":" + input.slice(-2,)).toUpperCase();
+                output += MAC.slice(0, 1) + XOR[MAC.slice(1, 2)] + MAC.slice(2) + "\n";
+            }
+
+            return output;
+        }
+
+
+        /**
+	 * Main
+	 */
+        let output = "";
+        let inputs = input.split("\n");
+        // Remove blank rows
+        inputs = inputs.filter(Boolean);
+
+        for (let i = 0; i < inputs.length; i++) {
+            // if ignore ranges is checked and input is a range, skip
+            if ((args[0] && !inputs[i].includes("/")) || (!args[0])) {
+                if (/^[0-9]{1,3}(?:\.[0-9]{1,3}){3}$/.test(inputs[i])) {
+                    output += ipTransition(inputs[i], false);
+                } else if (/\/24$/.test(inputs[i])) {
+                    output += ipTransition(inputs[i], true);
+                } else if (/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$/.test(inputs[i])) {
+                    output += macTransition(inputs[i]);
+                } else if (/^((?:[0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|(?:[0-9a-fA-F]{1,4}:){1,7}:|(?:[0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|(?:[0-9a-fA-F]{1,4}:){1,5}(?::[0-9a-fA-F]{1,4}){1,2}|(?:[0-9a-fA-F]{1,4}:){1,4}(?::[0-9a-fA-F]{1,4}){1,3}|(?:[0-9a-fA-F]{1,4}:){1,3}(?::[0-9a-fA-F]{1,4}){1,4}|(?:[0-9a-fA-F]{1,4}:){1,2}(?::[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:(?:(?::[0-9a-fA-F]{1,4}){1,6})|:(?:(?::[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(?::[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(?:ffff(?::0{1,4}){0,1}:){0,1}(?:(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])|(?:[0-9a-fA-F]{1,4}:){1,4}:(?:(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$/.test(inputs[i])) {
+                    output += unTransition(inputs[i]);
+                } else {
+                    output = "Enter compressed or expanded IPv6 address, IPv4 address or MAC Address.";
+                }
+            }
+        }
+
+        return output;
+    }
+
+}
+
+export default IPv6TransitionAddresses;

src/core/operations/ImageBrightnessContrast.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Image Brightness / Contrast operation
@@ -60,7 +60,7 @@ class ImageBrightnessContrast extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -78,9 +78,9 @@ class ImageBrightnessContrast extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/ImageFilter.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Image Filter operation
@@ -54,7 +54,7 @@ class ImageFilter extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -69,9 +69,9 @@ class ImageFilter extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/ImageHueSaturationLightness.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Image Hue/Saturation/Lightness operation
@@ -68,7 +68,7 @@ class ImageHueSaturationLightness extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -106,9 +106,9 @@ class ImageHueSaturationLightness extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/ImageOpacity.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Image Opacity operation
@@ -53,7 +53,7 @@ class ImageOpacity extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -64,9 +64,9 @@ class ImageOpacity extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/InvertImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Invert Image operation
@@ -44,7 +44,7 @@ class InvertImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -55,9 +55,9 @@ class InvertImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/JA4Fingerprint.mjs

@@ -0,0 +1,73 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import {toJA4} from "../lib/JA4.mjs";
+
+/**
+ * JA4 Fingerprint operation
+ */
+class JA4Fingerprint extends Operation {
+
+    /**
+     * JA4Fingerprint constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JA4 Fingerprint";
+        this.module = "Crypto";
+        this.description = "Generates a JA4 fingerprint to help identify TLS clients based on hashing together values from the Client Hello.<br><br>Input: A hex stream of the TLS or QUIC Client Hello packet application layer.";
+        this.infoURL = "https://medium.com/foxio/ja4-network-fingerprinting-9376fe9ca637";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Input format",
+                type: "option",
+                value: ["Hex", "Base64", "Raw"]
+            },
+            {
+                name: "Output format",
+                type: "option",
+                value: ["JA4", "JA4 Original Rendering", "JA4 Raw", "JA4 Raw Original Rendering", "All"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [inputFormat, outputFormat] = args;
+        input = Utils.convertToByteArray(input, inputFormat);
+        const ja4 = toJA4(new Uint8Array(input));
+
+        // Output
+        switch (outputFormat) {
+            case "JA4":
+                return ja4.JA4;
+            case "JA4 Original Rendering":
+                return ja4.JA4_o;
+            case "JA4 Raw":
+                return ja4.JA4_r;
+            case "JA4 Raw Original Rendering":
+                return ja4.JA4_ro;
+            case "All":
+            default:
+                return `JA4:    ${ja4.JA4}
+JA4_o:  ${ja4.JA4_o}
+JA4_r:  ${ja4.JA4_r}
+JA4_ro: ${ja4.JA4_ro}`;
+        }
+    }
+
+}
+
+export default JA4Fingerprint;

src/core/operations/JA4ServerFingerprint.mjs

@@ -0,0 +1,66 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import {toJA4S} from "../lib/JA4.mjs";
+
+/**
+ * JA4Server Fingerprint operation
+ */
+class JA4ServerFingerprint extends Operation {
+
+    /**
+     * JA4ServerFingerprint constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JA4Server Fingerprint";
+        this.module = "Crypto";
+        this.description = "Generates a JA4Server Fingerprint (JA4S) to help identify TLS servers or sessions based on hashing together values from the Server Hello.<br><br>Input: A hex stream of the TLS or QUIC Server Hello packet application layer.";
+        this.infoURL = "https://medium.com/foxio/ja4-network-fingerprinting-9376fe9ca637";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Input format",
+                type: "option",
+                value: ["Hex", "Base64", "Raw"]
+            },
+            {
+                name: "Output format",
+                type: "option",
+                value: ["JA4S", "JA4S Raw", "Both"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [inputFormat, outputFormat] = args;
+        input = Utils.convertToByteArray(input, inputFormat);
+        const ja4s = toJA4S(new Uint8Array(input));
+
+        // Output
+        switch (outputFormat) {
+            case "JA4S":
+                return ja4s.JA4S;
+            case "JA4S Raw":
+                return ja4s.JA4S_r;
+            case "Both":
+            default:
+                return `JA4S:   ${ja4s.JA4S}\nJA4S_r: ${ja4s.JA4S_r}`;
+        }
+    }
+
+}
+
+export default JA4ServerFingerprint;

src/core/operations/JPathExpression.mjs

@@ -35,12 +35,6 @@ class JPathExpression extends Operation {
                 name: "Result delimiter",
                 type: "binaryShortString",
                 value: "\\n"
-            },
-            {
-                name: "Prevent eval",
-                type: "boolean",
-                value: true,
-                description: "Evaluated expressions are disabled by default for security reasons"
             }
         ];
     }
@@ -51,7 +45,7 @@ class JPathExpression extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        const [query, delimiter, preventEval] = args;
+        const [query, delimiter] = args;
         let results, jsonObj;
 
         try {
@@ -63,8 +57,7 @@ class JPathExpression extends Operation {
         try {
             results = JSONPath({
                 path: query,
-                json: jsonObj,
-                preventEval: preventEval
+                json: jsonObj
             });
         } catch (err) {
             throw new OperationError(`Invalid JPath expression: ${err.message}`);

src/core/operations/JWKToPem.mjs

@@ -0,0 +1,80 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * PEM to JWK operation
+ */
+class PEMToJWK extends Operation {
+
+    /**
+     * PEMToJWK constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JWK to PEM";
+        this.module = "PublicKey";
+        this.description = "Converts Keys in JSON Web Key format to PEM format (PKCS#8).";
+        this.infoURL = "https://datatracker.ietf.org/doc/html/rfc7517";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+        this.checks = [
+            {
+                "pattern": "\"kty\":\\s*\"(EC|RSA)\"",
+                "flags": "gm",
+                "args": []
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const inputJson = JSON.parse(input);
+
+        let keys = [];
+        if (Array.isArray(inputJson)) {
+            // list of keys => transform all keys
+            keys = inputJson;
+        } else if (Array.isArray(inputJson.keys)) {
+            // JSON Web Key Set => transform all keys
+            keys = inputJson.keys;
+        } else if (typeof inputJson === "object") {
+            // single key
+            keys.push(inputJson);
+        } else {
+            throw new OperationError("Input is not a JSON Web Key");
+        }
+
+        let output = "";
+        for (let i=0; i<keys.length; i++) {
+            const jwk = keys[i];
+            if (typeof jwk.kty !== "string") {
+                throw new OperationError("Invalid JWK format");
+            } else if ("|RSA|EC|".indexOf(jwk.kty) === -1) {
+                throw new OperationError(`Unsupported JWK key type '${inputJson.kty}'`);
+            }
+
+            const key = r.KEYUTIL.getKey(jwk);
+            const pem = key.isPrivate ? r.KEYUTIL.getPEM(key, "PKCS8PRV") : r.KEYUTIL.getPEM(key);
+
+            // PEM ends with '\n', so a new key always starts on a new line
+            output += pem;
+        }
+
+        return output;
+    }
+}
+
+export default PEMToJWK;

src/core/operations/JWTSign.mjs

@@ -36,6 +36,11 @@ class JWTSign extends Operation {
                 name: "Signing algorithm",
                 type: "option",
                 value: JWT_ALGORITHMS
+            },
+            {
+                name: "Header",
+                type: "text",
+                value: "{}"
             }
         ];
     }
@@ -46,11 +51,12 @@ class JWTSign extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        const [key, algorithm] = args;
+        const [key, algorithm, header] = args;
 
         try {
             return jwt.sign(input, key, {
-                algorithm: algorithm === "None" ? "none" : algorithm
+                algorithm: algorithm === "None" ? "none" : algorithm,
+                header: JSON.parse(header || "{}")
             });
         } catch (err) {
             throw new OperationError(`Error: Have you entered the key correctly? The key should be either the secret for HMAC algorithms or the PEM-encoded private key for RSA and ECDSA.

src/core/operations/JWTVerify.mjs

@@ -22,7 +22,7 @@ class JWTVerify extends Operation {
 
         this.name = "JWT Verify";
         this.module = "Crypto";
-        this.description = "Verifies that a JSON Web Token is valid and has been signed with the provided secret / private key.<br><br>The key should be either the secret for HMAC algorithms or the PEM-encoded private key for RSA and ECDSA.";
+        this.description = "Verifies that a JSON Web Token is valid and has been signed with the provided secret / private key.<br><br>The key should be either the secret for HMAC algorithms or the PEM-encoded public key for RSA and ECDSA.";
         this.infoURL = "https://wikipedia.org/wiki/JSON_Web_Token";
         this.inputType = "string";
         this.outputType = "JSON";

src/core/operations/LuhnChecksum.mjs

@@ -1,5 +1,6 @@
 /**
  * @author n1073645 [n1073645@gmail.com]
+ * @author k3ach [k3ach@proton.me]
  * @copyright Crown Copyright 2020
  * @license Apache-2.0
  */
@@ -20,39 +21,46 @@ class LuhnChecksum extends Operation {
 
         this.name = "Luhn Checksum";
         this.module = "Default";
-        this.description = "The Luhn algorithm, also known as the modulus 10 or mod 10 algorithm, is a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers and Canadian Social Insurance Numbers.";
-        this.infoURL = "https://wikipedia.org/wiki/Luhn_algorithm";
+        this.description = "The Luhn mod N algorithm using the english alphabet. The Luhn mod N algorithm is an extension to the Luhn algorithm (also known as mod 10 algorithm) that allows it to work with sequences of values in any even-numbered base. This can be useful when a check digit is required to validate an identification string composed of letters, a combination of letters and digits or any arbitrary set of N characters where N is divisible by 2.";
+        this.infoURL = "https://en.wikipedia.org/wiki/Luhn_mod_N_algorithm";
         this.inputType = "string";
         this.outputType = "string";
-        this.args = [];
+        this.args = [
+            {
+                "name": "Radix",
+                "type": "number",
+                "value": 10
+            }
+        ];
     }
 
     /**
-     * Generates the Luhn Checksum from the input.
+     * Generates the Luhn checksum from the input.
      *
      * @param {string} inputStr
      * @returns {number}
      */
-    checksum(inputStr) {
+    checksum(inputStr, radix = 10) {
         let even = false;
         return inputStr.split("").reverse().reduce((acc, elem) => {
-            // Convert element to integer.
-            let temp = parseInt(elem, 10);
+            // Convert element to an integer based on the provided radix.
+            let temp = parseInt(elem, radix);
 
-            // If element is not an integer.
-            if (isNaN(temp))
-                throw new OperationError("Character: " + elem + " is not a digit.");
+            // If element is not a valid number in the given radix.
+            if (isNaN(temp)) {
+                throw new Error("Character: " + elem + " is not valid in radix " + radix + ".");
+            }
 
             // If element is in an even position
             if (even) {
-                // Double the element and add the quotient and remainder together.
-                temp = 2 * elem;
-                temp = Math.floor(temp/10) + (temp % 10);
+                // Double the element and sum the quotient and remainder.
+                temp = 2 * temp;
+                temp = Math.floor(temp / radix) + (temp % radix);
             }
 
             even = !even;
             return acc + temp;
-        }, 0)  % 10;
+        }, 0) % radix; // Use radix as the modulus base
     }
 
     /**
@@ -63,9 +71,20 @@ class LuhnChecksum extends Operation {
     run(input, args) {
         if (!input) return "";
 
-        const checkSum = this.checksum(input);
-        let checkDigit = this.checksum(input + "0");
-        checkDigit = checkDigit === 0 ? 0 : (10-checkDigit);
+        const radix = args[0];
+
+        if (radix < 2 || radix > 36) {
+            throw new OperationError("Error: Radix argument must be between 2 and 36");
+        }
+
+        if (radix % 2 !== 0) {
+            throw new OperationError("Error: Radix argument must be divisible by 2");
+        }
+
+        const checkSum = this.checksum(input, radix).toString(radix);
+        let checkDigit = this.checksum(input + "0", radix);
+        checkDigit = checkDigit === 0 ? 0 : (radix - checkDigit);
+        checkDigit = checkDigit.toString(radix);
 
         return `Checksum: ${checkSum}
 Checkdigit: ${checkDigit}

src/core/operations/MIMEDecoding.mjs

@@ -0,0 +1,171 @@
+/**
+ * @author mshwed [m@ttshwed.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
+import { fromHex } from "../lib/Hex.mjs";
+import { fromBase64 } from "../lib/Base64.mjs";
+import cptable from "codepage";
+
+/**
+ * MIME Decoding operation
+ */
+class MIMEDecoding extends Operation {
+
+    /**
+     * MIMEDecoding constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "MIME Decoding";
+        this.module = "Default";
+        this.description = "Enables the decoding of MIME message header extensions for non-ASCII text";
+        this.infoURL = "https://tools.ietf.org/html/rfc2047";
+        this.inputType = "byteArray";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const mimeEncodedText = Utils.byteArrayToUtf8(input);
+        const encodedHeaders = mimeEncodedText.replace(/\r\n/g, "\n");
+
+        const decodedHeader = this.decodeHeaders(encodedHeaders);
+
+        return decodedHeader;
+    }
+
+    /**
+     * Decode MIME header strings
+     *
+     * @param headerString
+     */
+    decodeHeaders(headerString) {
+        // No encoded words detected
+        let i = headerString.indexOf("=?");
+        if (i === -1) return headerString;
+
+        let decodedHeaders = headerString.slice(0, i);
+        let header = headerString.slice(i);
+
+        let isBetweenWords = false;
+        let start, cur, charset, encoding, j, end, text;
+        while (header.length > -1) {
+            start = header.indexOf("=?");
+            if (start === -1) break;
+            cur = start + "=?".length;
+
+            i = header.slice(cur).indexOf("?");
+            if (i === -1) break;
+
+            charset = header.slice(cur, cur + i);
+            cur += i + "?".length;
+
+            if (header.length < cur + "Q??=".length) break;
+
+            encoding = header[cur];
+            cur += 1;
+
+            if (header[cur] !== "?") break;
+
+            cur += 1;
+
+            j = header.slice(cur).indexOf("?=");
+            if (j === -1) break;
+
+            text = header.slice(cur, cur + j);
+            end = cur + j + "?=".length;
+
+            if (encoding.toLowerCase() === "b") {
+                text = fromBase64(text);
+            } else if (encoding.toLowerCase() === "q") {
+                text = this.parseQEncodedWord(text);
+            } else {
+                isBetweenWords = false;
+                decodedHeaders += header.slice(0, start + 2);
+                header = header.slice(start + 2);
+            }
+
+            if (start > 0 && (!isBetweenWords || header.slice(0, start).search(/\S/g) > -1)) {
+                decodedHeaders += header.slice(0, start);
+            }
+
+            decodedHeaders += this.convertFromCharset(charset, text);
+
+            header = header.slice(end);
+            isBetweenWords = true;
+        }
+
+        if (header.length > 0) {
+            decodedHeaders += header;
+        }
+
+        return decodedHeaders;
+    }
+
+    /**
+     * Converts decoded text for supported charsets.
+     * Supports UTF-8, US-ASCII, ISO-8859-*
+     *
+     * @param encodedWord
+     */
+    convertFromCharset(charset, encodedText) {
+        charset = charset.toLowerCase();
+        const parsedCharset = charset.split("-");
+
+        if (parsedCharset.length === 2 && parsedCharset[0] === "utf" && charset === "utf-8") {
+            return cptable.utils.decode(65001, encodedText);
+        } else if (parsedCharset.length === 2 && charset === "us-ascii") {
+            return cptable.utils.decode(20127, encodedText);
+        } else if (parsedCharset.length === 3 && parsedCharset[0] === "iso" && parsedCharset[1] === "8859") {
+            const isoCharset = parseInt(parsedCharset[2], 10);
+            if (isoCharset >= 1 && isoCharset <= 16) {
+                return cptable.utils.decode(28590 + isoCharset, encodedText);
+            }
+        }
+
+        throw new OperationError("Unhandled Charset");
+    }
+
+    /**
+     * Parses a Q encoded word
+     *
+     * @param encodedWord
+     */
+    parseQEncodedWord(encodedWord) {
+        let decodedWord = "";
+        for (let i = 0; i < encodedWord.length; i++) {
+            if (encodedWord[i] === "_") {
+                decodedWord += " ";
+            // Parse hex encoding
+            } else if (encodedWord[i] === "=") {
+                if ((i + 2) >= encodedWord.length) throw new OperationError("Incorrectly Encoded Word");
+                const decodedHex = Utils.byteArrayToChars(fromHex(encodedWord.substring(i + 1, i + 3)));
+                decodedWord += decodedHex;
+                i += 2;
+            } else if (
+                (encodedWord[i].charCodeAt(0) >= " ".charCodeAt(0) && encodedWord[i].charCodeAt(0) <= "~".charCodeAt(0)) ||
+                encodedWord[i] === "\n" ||
+                encodedWord[i] === "\r" ||
+                encodedWord[i] === "\t") {
+                decodedWord += encodedWord[i];
+            } else {
+                throw new OperationError("Incorrectly Encoded Word");
+            }
+        }
+
+        return decodedWord;
+    }
+}
+
+export default MIMEDecoding;

src/core/operations/MurmurHash3.mjs

@@ -0,0 +1,139 @@
+/**
+ * Based on murmurhash-js (https://github.com/garycourt/murmurhash-js)
+ * @author Gary Court
+ * @license MIT
+ *
+ * @author AliceGrey [alice@grey.systems]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * MurmurHash3 operation
+ */
+class MurmurHash3 extends Operation {
+
+    /**
+     * MurmurHash3 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "MurmurHash3";
+        this.module = "Hashing";
+        this.description = "Generates a MurmurHash v3 for a string input and an optional seed input";
+        this.infoURL = "https://wikipedia.org/wiki/MurmurHash";
+        this.inputType = "string";
+        this.outputType = "number";
+        this.args = [
+            {
+                name: "Seed",
+                type: "number",
+                value: 0
+            },
+            {
+                name: "Convert to Signed",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+ /**
+ * Calculates the MurmurHash3 hash of the input.
+ * Based on Gary Court's JS MurmurHash implementation
+ * @see http://github.com/garycourt/murmurhash-js
+ * @author AliceGrey [alice@grey.systems]
+ * @param {string} input ASCII only
+ * @param {number} seed Positive integer only
+ * @return {number} 32-bit positive integer hash
+ */
+    mmh3(input, seed) {
+        let h1b;
+        let k1;
+        const remainder = input.length & 3; // input.length % 4
+        const bytes = input.length - remainder;
+        let h1 = seed;
+        const c1 = 0xcc9e2d51;
+        const c2 = 0x1b873593;
+        let i = 0;
+
+        while (i < bytes) {
+            k1 =
+                ((input.charCodeAt(i) & 0xff)) |
+                ((input.charCodeAt(++i) & 0xff) << 8) |
+                ((input.charCodeAt(++i) & 0xff) << 16) |
+                ((input.charCodeAt(++i) & 0xff) << 24);
+            ++i;
+
+            k1 = ((((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16))) & 0xffffffff;
+            k1 = (k1 << 15) | (k1 >>> 17);
+            k1 = ((((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16))) & 0xffffffff;
+
+            h1 ^= k1;
+            h1 = (h1 << 13) | (h1 >>> 19);
+            h1b = ((((h1 & 0xffff) * 5) + ((((h1 >>> 16) * 5) & 0xffff) << 16))) & 0xffffffff;
+            h1 = (((h1b & 0xffff) + 0x6b64) + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16));
+        }
+
+        k1 = 0;
+
+        if (remainder === 3) {
+            k1 ^= (input.charCodeAt(i + 2) & 0xff) << 16;
+        }
+
+        if (remainder === 3 || remainder === 2) {
+            k1 ^= (input.charCodeAt(i + 1) & 0xff) << 8;
+        }
+
+        if (remainder === 3 || remainder === 2 || remainder === 1) {
+            k1 ^= (input.charCodeAt(i) & 0xff);
+
+            k1 = (((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
+            k1 = (k1 << 15) | (k1 >>> 17);
+            k1 = (((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;
+            h1 ^= k1;
+        }
+
+        h1 ^= input.length;
+
+        h1 ^= h1 >>> 16;
+        h1 = (((h1 & 0xffff) * 0x85ebca6b) + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;
+        h1 ^= h1 >>> 13;
+        h1 = ((((h1 & 0xffff) * 0xc2b2ae35) + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16))) & 0xffffffff;
+        h1 ^= h1 >>> 16;
+
+        return h1 >>> 0;
+    }
+
+    /**
+    * Converts an unsigned 32-bit integer to a signed 32-bit integer
+    * @author AliceGrey [alice@grey.systems]
+    * @param {value} 32-bit unsigned integer
+    * @return {number} 32-bit signed integer
+    */
+    unsignedToSigned(value) {
+        return value & 0x80000000 ? -0x100000000 + value : value;
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {number}
+     */
+    run(input, args) {
+        if (args && args.length >= 1) {
+            const seed = args[0];
+            const hash = this.mmh3(input, seed);
+            if (args.length > 1 && args[1]) {
+                return this.unsignedToSigned(hash);
+            }
+            return hash;
+        }
+        return this.mmh3(input);
+    }
+}
+
+export default MurmurHash3;

src/core/operations/NormaliseImage.mjs

@@ -8,7 +8,7 @@ import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Normalise Image operation
@@ -43,7 +43,7 @@ class NormaliseImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error opening image file. (${err})`);
         }
@@ -53,9 +53,9 @@ class NormaliseImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/OpticalCharacterRecognition.mjs

@@ -12,9 +12,10 @@ import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
 
-import process from "process";
 import { createWorker } from "tesseract.js";
 
+const OEM_MODES = ["Tesseract only", "LSTM only", "Tesseract/LSTM Combined"];
+
 /**
  * Optical Character Recognition operation
  */
@@ -37,6 +38,12 @@ class OpticalCharacterRecognition extends Operation {
                 name: "Show confidence",
                 type: "boolean",
                 value: true
+            },
+            {
+                name: "OCR Engine Mode",
+                type: "option",
+                value: OEM_MODES,
+                defaultIndex: 1
             }
         ];
     }
@@ -47,7 +54,7 @@ class OpticalCharacterRecognition extends Operation {
      * @returns {string}
      */
     async run(input, args) {
-        const [showConfidence] = args;
+        const [showConfidence, oemChoice] = args;
 
         if (!isWorkerEnvironment()) throw new OperationError("This operation only works in a browser");
 
@@ -56,12 +63,13 @@ class OpticalCharacterRecognition extends Operation {
             throw new OperationError("Unsupported file type (supported: jpg,png,pbm,bmp) or no file provided");
         }
 
-        const assetDir = isWorkerEnvironment() ? `${self.docURL}/assets/` : `${process.cwd()}/src/core/vendor/`;
+        const assetDir = `${self.docURL}/assets/`;
+        const oem = OEM_MODES.indexOf(oemChoice);
 
         try {
             self.sendStatusMessage("Spinning up Tesseract worker...");
             const image = `data:${type};base64,${toBase64(input)}`;
-            const worker = createWorker({
+            const worker = await createWorker("eng", oem, {
                 workerPath: `${assetDir}tesseract/worker.min.js`,
                 langPath: `${assetDir}tesseract/lang-data`,
                 corePath: `${assetDir}tesseract/tesseract-core.wasm.js`,
@@ -71,11 +79,6 @@ class OpticalCharacterRecognition extends Operation {
                     }
                 }
             });
-            await worker.load();
-            self.sendStatusMessage(`Loading English language pack...`);
-            await worker.loadLanguage("eng");
-            self.sendStatusMessage("Intialising Tesseract API...");
-            await worker.initialize("eng");
             self.sendStatusMessage("Finding text...");
             const result = await worker.recognize(image);
 

src/core/operations/PEMToJWK.mjs

@@ -0,0 +1,88 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * PEM to JWK operation
+ */
+class PEMToJWK extends Operation {
+
+    /**
+     * PEMToJWK constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "PEM to JWK";
+        this.module = "PublicKey";
+        this.description = "Converts Keys in PEM format to a JSON Web Key format.";
+        this.infoURL = "https://datatracker.ietf.org/doc/html/rfc7517";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+        this.checks = [
+            {
+                "pattern": "-----BEGIN ((RSA |EC )?(PRIVATE|PUBLIC) KEY|CERTIFICATE)-----",
+                "args": []
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let output = "";
+        let match;
+        const regex = /-----BEGIN ([A-Z][A-Z ]+[A-Z])-----/g;
+        while ((match = regex.exec(input)) !== null) {
+            // find corresponding end tag
+            const indexBase64 = match.index + match[0].length;
+            const header = input.substring(match.index, indexBase64);
+            const footer = `-----END ${match[1]}-----`;
+            const indexFooter = input.indexOf(footer, indexBase64);
+            if (indexFooter === -1) {
+                throw new OperationError(`PEM footer '${footer}' not found`);
+            }
+
+            const pem = input.substring(match.index, indexFooter + footer.length);
+            if (match[1].indexOf("KEY") !== -1) {
+                if (header === "-----BEGIN RSA PUBLIC KEY-----") {
+                    throw new OperationError("Unsupported RSA public key format. Only PKCS#8 is supported.");
+                }
+
+                const key = r.KEYUTIL.getKey(pem);
+                if (key.type === "DSA") {
+                    throw new OperationError("DSA keys are not supported for JWK");
+                }
+                const jwk = r.KEYUTIL.getJWKFromKey(key);
+                if (output.length > 0) {
+                    output += "\n";
+                }
+                output += JSON.stringify(jwk);
+            } else if (match[1] === "CERTIFICATE") {
+                const cert = new r.X509();
+                cert.readCertPEM(pem);
+                const key = cert.getPublicKey();
+                const jwk = r.KEYUTIL.getJWKFromKey(key);
+                if (output.length > 0) {
+                    output += "\n";
+                }
+                output += JSON.stringify(jwk);
+            } else {
+                throw new OperationError(`Unsupported PEM type '${match[1]}'`);
+            }
+        }
+        return output;
+    }
+}
+
+export default PEMToJWK;

src/core/operations/ParseCSR.mjs

@@ -0,0 +1,390 @@
+/**
+ * @author jkataja
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import { formatDnObj } from "../lib/PublicKey.mjs";
+import Utils from "../Utils.mjs";
+
+/**
+ * Parse CSR operation
+ */
+class ParseCSR extends Operation {
+
+    /**
+     * ParseCSR constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Parse CSR";
+        this.module = "PublicKey";
+        this.description = "Parse Certificate Signing Request (CSR) for an X.509 certificate";
+        this.infoURL = "https://wikipedia.org/wiki/Certificate_signing_request";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Input format",
+                "type": "option",
+                "value": ["PEM"]
+            }
+        ];
+        this.checks = [
+            {
+                "pattern": "^-+BEGIN CERTIFICATE REQUEST-+\\r?\\n[\\da-z+/\\n\\r]+-+END CERTIFICATE REQUEST-+\\r?\\n?$",
+                "flags": "i",
+                "args": ["PEM"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string} Human-readable description of a Certificate Signing Request (CSR).
+     */
+    run(input, args) {
+        if (!input.length) {
+            return "No input";
+        }
+
+        // Parse the CSR into JSON parameters
+        const csrParam = new r.KJUR.asn1.csr.CSRUtil.getParam(input);
+
+        return `Subject\n${formatDnObj(csrParam.subject, 2)}
+Public Key${formatSubjectPublicKey(csrParam.sbjpubkey)}
+Signature${formatSignature(csrParam.sigalg, csrParam.sighex)}
+Requested Extensions${formatRequestedExtensions(csrParam)}`;
+    }
+}
+
+/**
+ * Format signature of a CSR
+ * @param {*} sigAlg string
+ * @param {*} sigHex string
+ * @returns Multi-line string describing CSR Signature
+ */
+function formatSignature(sigAlg, sigHex) {
+    let out = `\n`;
+
+    out += `  Algorithm:      ${sigAlg}\n`;
+
+    if (new RegExp("withdsa", "i").test(sigAlg)) {
+        const d = new r.KJUR.crypto.DSA();
+        const sigParam = d.parseASN1Signature(sigHex);
+        out += `  Signature:
+      R:          ${formatHexOntoMultiLine(absBigIntToHex(sigParam[0]))}
+      S:          ${formatHexOntoMultiLine(absBigIntToHex(sigParam[1]))}\n`;
+    } else if (new RegExp("withrsa", "i").test(sigAlg)) {
+        out += `  Signature:      ${formatHexOntoMultiLine(sigHex)}\n`;
+    } else {
+        out += `  Signature:      ${formatHexOntoMultiLine(ensureHexIsPositiveInTwosComplement(sigHex))}\n`;
+    }
+
+    return chop(out);
+}
+
+/**
+ * Format Subject Public Key from PEM encoded public key string
+ * @param {*} publicKeyPEM string
+ * @returns Multi-line string describing Subject Public Key Info
+ */
+function formatSubjectPublicKey(publicKeyPEM) {
+    let out = "\n";
+
+    const publicKey = r.KEYUTIL.getKey(publicKeyPEM);
+    if (publicKey instanceof r.RSAKey) {
+        out += `  Algorithm:      RSA
+  Length:         ${publicKey.n.bitLength()} bits
+  Modulus:        ${formatHexOntoMultiLine(absBigIntToHex(publicKey.n))}
+  Exponent:       ${publicKey.e} (0x${Utils.hex(publicKey.e)})\n`;
+    } else if (publicKey instanceof r.KJUR.crypto.ECDSA) {
+        out += `  Algorithm:      ECDSA
+  Length:         ${publicKey.ecparams.keylen} bits
+  Pub:            ${formatHexOntoMultiLine(publicKey.pubKeyHex)}
+  ASN1 OID:       ${r.KJUR.crypto.ECDSA.getName(publicKey.getShortNISTPCurveName())}
+  NIST CURVE:     ${publicKey.getShortNISTPCurveName()}\n`;
+    } else if (publicKey instanceof r.KJUR.crypto.DSA) {
+        out += `  Algorithm:      DSA
+  Length:         ${publicKey.p.toString(16).length * 4} bits
+  Pub:            ${formatHexOntoMultiLine(absBigIntToHex(publicKey.y))}
+  P:              ${formatHexOntoMultiLine(absBigIntToHex(publicKey.p))}
+  Q:              ${formatHexOntoMultiLine(absBigIntToHex(publicKey.q))}
+  G:              ${formatHexOntoMultiLine(absBigIntToHex(publicKey.g))}\n`;
+    } else {
+        out += `unsupported public key algorithm\n`;
+    }
+
+    return chop(out);
+}
+
+/**
+ * Format known extensions of a CSR
+ * @param {*} csrParam object
+ * @returns Multi-line string describing CSR Requested Extensions
+ */
+function formatRequestedExtensions(csrParam) {
+    const formattedExtensions = new Array(4).fill("");
+
+    if (Object.hasOwn(csrParam, "extreq")) {
+        for (const extension of csrParam.extreq) {
+            let parts = [];
+            switch (extension.extname) {
+                case "basicConstraints" :
+                    parts = describeBasicConstraints(extension);
+                    formattedExtensions[0] = `  Basic Constraints:${formatExtensionCriticalTag(extension)}\n${indent(4, parts)}`;
+                    break;
+                case "keyUsage" :
+                    parts = describeKeyUsage(extension);
+                    formattedExtensions[1] = `  Key Usage:${formatExtensionCriticalTag(extension)}\n${indent(4, parts)}`;
+                    break;
+                case "extKeyUsage" :
+                    parts = describeExtendedKeyUsage(extension);
+                    formattedExtensions[2] = `  Extended Key Usage:${formatExtensionCriticalTag(extension)}\n${indent(4, parts)}`;
+                    break;
+                case "subjectAltName" :
+                    parts = describeSubjectAlternativeName(extension);
+                    formattedExtensions[3] = `  Subject Alternative Name:${formatExtensionCriticalTag(extension)}\n${indent(4, parts)}`;
+                    break;
+                default :
+                    parts = ["(unsuported extension)"];
+                    formattedExtensions.push(`  ${extension.extname}:${formatExtensionCriticalTag(extension)}\n${indent(4, parts)}`);
+            }
+        }
+    }
+
+    let out = "\n";
+
+    formattedExtensions.forEach((formattedExtension) => {
+        if (formattedExtension !== undefined && formattedExtension !== null && formattedExtension.length !== 0) {
+            out += formattedExtension;
+        }
+    });
+
+    return chop(out);
+}
+
+/**
+ * Format extension critical tag
+ * @param {*} extension Object
+ * @returns String describing whether the extension is critical or not
+ */
+function formatExtensionCriticalTag(extension) {
+    return Object.hasOwn(extension, "critical") && extension.critical ? " critical" : "";
+}
+
+/**
+ * Format string input as a comma separated hex string on multiple lines
+ * @param {*} hex String
+ * @returns Multi-line string describing the Hex input
+ */
+function formatHexOntoMultiLine(hex) {
+    if (hex.length % 2 !== 0) {
+        hex = "0" + hex;
+    }
+
+    return formatMultiLine(chop(hex.replace(/(..)/g, "$&:")));
+}
+
+/**
+ * Convert BigInt to abs value in Hex
+ * @param {*} int BigInt
+ * @returns String representing absolute value in Hex
+ */
+function absBigIntToHex(int) {
+    int = int < 0n ? -int : int;
+
+    return ensureHexIsPositiveInTwosComplement(int.toString(16));
+}
+
+/**
+ * Ensure Hex String remains positive in 2's complement
+ * @param {*} hex String
+ * @returns Hex String ensuring value remains positive in 2's complement
+ */
+function ensureHexIsPositiveInTwosComplement(hex) {
+    if (hex.length % 2 !== 0) {
+        return "0" + hex;
+    }
+
+    // prepend 00 if most significant bit is 1 (sign bit)
+    if (hex.length >=2 && (parseInt(hex.substring(0, 2), 16) & 128)) {
+        hex = "00" + hex;
+    }
+
+    return hex;
+}
+
+/**
+ * Format string onto multiple lines
+ * @param {*} longStr
+ * @returns String as a multi-line string
+ */
+function formatMultiLine(longStr) {
+    const lines = [];
+
+    for (let remain = longStr ; remain !== "" ; remain = remain.substring(48)) {
+        lines.push(remain.substring(0, 48));
+    }
+
+    return lines.join("\n                  ");
+}
+
+/**
+ * Describe Basic Constraints
+ * @see RFC 5280 4.2.1.9. Basic Constraints https://www.ietf.org/rfc/rfc5280.txt
+ * @param {*} extension CSR extension with the name `basicConstraints`
+ * @returns Array of strings describing Basic Constraints
+ */
+function describeBasicConstraints(extension) {
+    const constraints = [];
+
+    constraints.push(`CA = ${Object.hasOwn(extension, "cA") && extension.cA ? "true" : "false"}`);
+    if (Object.hasOwn(extension, "pathLen")) constraints.push(`PathLenConstraint = ${extension.pathLen}`);
+
+    return constraints;
+}
+
+/**
+ * Describe Key Usage extension permitted use cases
+ * @see RFC 5280 4.2.1.3. Key Usage https://www.ietf.org/rfc/rfc5280.txt
+ * @param {*} extension CSR extension with the name `keyUsage`
+ * @returns Array of strings describing Key Usage extension permitted use cases
+ */
+function describeKeyUsage(extension) {
+    const usage = [];
+
+    const kuIdentifierToName = {
+        digitalSignature: "Digital Signature",
+        nonRepudiation:   "Non-repudiation",
+        keyEncipherment:  "Key encipherment",
+        dataEncipherment: "Data encipherment",
+        keyAgreement:     "Key agreement",
+        keyCertSign:      "Key certificate signing",
+        cRLSign:          "CRL signing",
+        encipherOnly:     "Encipher Only",
+        decipherOnly:     "Decipher Only",
+    };
+
+    if (Object.hasOwn(extension, "names")) {
+        extension.names.forEach((ku) => {
+            if (Object.hasOwn(kuIdentifierToName, ku)) {
+                usage.push(kuIdentifierToName[ku]);
+            } else {
+                usage.push(`unknown key usage (${ku})`);
+            }
+        });
+    }
+
+    if (usage.length === 0) usage.push("(none)");
+
+    return usage;
+}
+
+/**
+ * Describe Extended Key Usage extension permitted use cases
+ * @see RFC 5280 4.2.1.12. Extended Key Usage https://www.ietf.org/rfc/rfc5280.txt
+ * @param {*} extension CSR extension with the name `extendedKeyUsage`
+ * @returns Array of strings describing Extended Key Usage extension permitted use cases
+ */
+function describeExtendedKeyUsage(extension) {
+    const usage = [];
+
+    const ekuIdentifierToName = {
+        "serverAuth":             "TLS Web Server Authentication",
+        "clientAuth":             "TLS Web Client Authentication",
+        "codeSigning":            "Code signing",
+        "emailProtection":        "E-mail Protection (S/MIME)",
+        "timeStamping":           "Trusted Timestamping",
+        "1.3.6.1.4.1.311.2.1.21": "Microsoft Individual Code Signing",  // msCodeInd
+        "1.3.6.1.4.1.311.2.1.22": "Microsoft Commercial Code Signing",  // msCodeCom
+        "1.3.6.1.4.1.311.10.3.1": "Microsoft Trust List Signing",  // msCTLSign
+        "1.3.6.1.4.1.311.10.3.3": "Microsoft Server Gated Crypto",  // msSGC
+        "1.3.6.1.4.1.311.10.3.4": "Microsoft Encrypted File System",  // msEFS
+        "1.3.6.1.4.1.311.20.2.2": "Microsoft Smartcard Login",  // msSmartcardLogin
+        "2.16.840.1.113730.4.1":  "Netscape Server Gated Crypto",  // nsSGC
+    };
+
+    if (Object.hasOwn(extension, "array")) {
+        extension.array.forEach((eku) => {
+            if (Object.hasOwn(ekuIdentifierToName, eku)) {
+                usage.push(ekuIdentifierToName[eku]);
+            } else {
+                usage.push(eku);
+            }
+        });
+    }
+
+    if (usage.length === 0) usage.push("(none)");
+
+    return usage;
+}
+
+/**
+ * Format Subject Alternative Names from the name `subjectAltName` extension
+ * @see RFC 5280 4.2.1.6. Subject Alternative Name https://www.ietf.org/rfc/rfc5280.txt
+ * @param {*} extension object
+ * @returns Array of strings describing Subject Alternative Name extension
+ */
+function describeSubjectAlternativeName(extension) {
+    const names = [];
+
+    if (Object.hasOwn(extension, "extname") && extension.extname === "subjectAltName") {
+        if (Object.hasOwn(extension, "array")) {
+            for (const altName of extension.array) {
+                Object.keys(altName).forEach((key) => {
+                    switch (key) {
+                        case "rfc822":
+                            names.push(`EMAIL: ${altName[key]}`);
+                            break;
+                        case "dns":
+                            names.push(`DNS: ${altName[key]}`);
+                            break;
+                        case "uri":
+                            names.push(`URI: ${altName[key]}`);
+                            break;
+                        case "ip":
+                            names.push(`IP: ${altName[key]}`);
+                            break;
+                        case "dn":
+                            names.push(`DIR: ${altName[key].str}`);
+                            break;
+                        case "other" :
+                            names.push(`Other: ${altName[key].oid}::${altName[key].value.utf8str.str}`);
+                            break;
+                        default:
+                            names.push(`(unable to format SAN '${key}':${altName[key]})\n`);
+                    }
+                });
+            }
+        }
+    }
+
+    return names;
+}
+
+/**
+ * Join an array of strings and add leading spaces to each line.
+ * @param {*} n How many leading spaces
+ * @param {*} parts Array of strings
+ * @returns Joined and indented string.
+ */
+function indent(n, parts) {
+    const fluff = " ".repeat(n);
+    return fluff + parts.join("\n" + fluff) + "\n";
+}
+
+/**
+ * Remove last character from a string.
+ * @param {*} s String
+ * @returns Chopped string.
+ */
+function chop(s) {
+    return s.substring(0, s.length - 1);
+}
+
+export default ParseCSR;

src/core/operations/ParseTLSRecord.mjs

@@ -0,0 +1,884 @@
+/**
+ * @author c65722 []
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import {toHexFast} from "../lib/Hex.mjs";
+import {objToTable} from "../lib/Protocol.mjs";
+import Stream from "../lib/Stream.mjs";
+
+/**
+ * Parse TLS record operation.
+ */
+class ParseTLSRecord extends Operation {
+
+    /**
+     * ParseTLSRecord constructor.
+     */
+    constructor() {
+        super();
+
+        this.name = "Parse TLS record";
+        this.module = "Default";
+        this.description = "Parses one or more TLS records";
+        this.infoURL = "https://wikipedia.org/wiki/Transport_Layer_Security";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "json";
+        this.presentType = "html";
+        this.args = [];
+        this._handshakeParser = new HandshakeParser();
+        this._contentTypes = new Map();
+
+        for (const key in ContentType) {
+            this._contentTypes[ContentType[key]] = key.toString().toLocaleLowerCase();
+        }
+    }
+
+    /**
+     * @param {ArrayBuffer} input - Stream, containing one or more raw TLS Records.
+     * @param {Object[]} args
+     * @returns {Object[]} Array of Object representations of TLS Records contained within input.
+     */
+    run(input, args) {
+        const s = new Stream(new Uint8Array(input));
+
+        const output = [];
+
+        while (s.hasMore()) {
+            const record = this._readRecord(s);
+            if (record) {
+                output.push(record);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads a TLS Record from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw TLS Record.
+     * @returns {Object} Object representation of TLS Record.
+     */
+    _readRecord(input) {
+        const RECORD_HEADER_LEN = 5;
+
+        if (input.position + RECORD_HEADER_LEN > input.length) {
+            input.moveTo(input.length);
+
+            return null;
+        }
+
+        const type = input.readInt(1);
+        const typeString = this._contentTypes[type] ?? type.toString();
+        const version = "0x" + toHexFast(input.getBytes(2));
+        const length = input.readInt(2);
+        const content = input.getBytes(length);
+        const truncated = content.length < length;
+
+        const recordHeader = new RecordHeader(typeString, version, length, truncated);
+
+        if (!content.length) {
+            return {...recordHeader};
+        }
+
+        if (type === ContentType.HANDSHAKE) {
+            return this._handshakeParser.parse(new Stream(content), recordHeader);
+        }
+
+        const record = {...recordHeader};
+        record.value = "0x" + toHexFast(content);
+
+        return record;
+    }
+
+    /**
+     * Displays the parsed TLS Records in a tabular style.
+     *
+     * @param {Object[]} data - Array of Object representations of the TLS Records.
+     * @returns {html} HTML representation of TLS Records contained within data.
+     */
+    present(data) {
+        return data.map(r => objToTable(r)).join("\n\n");
+    }
+}
+
+export default ParseTLSRecord;
+
+/**
+ * Repesents the known values of type field of a TLS Record header.
+ */
+const ContentType = Object.freeze({
+    CHANGE_CIPHER_SPEC: 20,
+    ALERT: 21,
+    HANDSHAKE: 22,
+    APPLICATION_DATA: 23,
+});
+
+/**
+ * Represents a TLS Record header
+ */
+class RecordHeader {
+    /**
+     * RecordHeader cosntructor.
+     *
+     * @param {string} type - String representation of TLS Record type field.
+     * @param {string} version - Hex representation of TLS Record version field.
+     * @param {int} length - Length of TLS Record.
+     * @param {bool} truncated - Is TLS Record truncated.
+     */
+    constructor(type, version, length, truncated) {
+        this.type = type;
+        this.version = version;
+        this.length = length;
+
+        if (truncated) {
+            this.truncated = true;
+        }
+    }
+}
+
+/**
+ * Parses TLS Handshake messages.
+ */
+class HandshakeParser {
+
+    /**
+     * HandshakeParser constructor.
+     */
+    constructor() {
+        this._clientHelloParser = new ClientHelloParser();
+        this._serverHelloParser = new ServerHelloParser();
+        this._newSessionTicketParser = new NewSessionTicketParser();
+        this._certificateParser = new CertificateParser();
+        this._certificateRequestParser = new CertificateRequestParser();
+        this._certificateVerifyParser = new CertificateVerifyParser();
+        this._handshakeTypes = new Map();
+
+        for (const key in HandshakeType) {
+            this._handshakeTypes[HandshakeType[key]] = key.toString().toLowerCase();
+        }
+    }
+
+    /**
+     * Parses a single TLS handshake message.
+     *
+     * @param {Stream} input - Stream, containing a raw Handshake message.
+     * @param {RecordHeader} recordHeader - TLS Record header.
+     * @returns {Object} Object representation of Handshake.
+     */
+    parse(input, recordHeader) {
+        const output = {...recordHeader};
+
+        if (!input.hasMore()) {
+            return output;
+        }
+
+        const handshakeType = input.readInt(1);
+        output.handshakeType = this._handshakeTypes[handshakeType] ?? handshakeType.toString();
+
+        if (input.position + 3 > input.length) {
+            input.moveTo(input.length);
+
+            return output;
+        }
+
+        const handshakeLength = input.readInt(3);
+
+        if (handshakeLength + 4 !== recordHeader.length) {
+            input.moveTo(0);
+
+            output.handshakeType = this._handshakeTypes[HandshakeType.FINISHED];
+            output.handshakeValue = "0x" + toHexFast(input.bytes);
+
+            return output;
+        }
+
+        const content = input.getBytes(handshakeLength);
+        if (!content.length) {
+            return output;
+        }
+
+        switch (handshakeType) {
+            case HandshakeType.CLIENT_HELLO:
+                return {...output, ...this._clientHelloParser.parse(new Stream(content))};
+            case HandshakeType.SERVER_HELLO:
+                return {...output, ...this._serverHelloParser.parse(new Stream(content))};
+            case HandshakeType.NEW_SESSION_TICKET:
+                return {...output, ...this._newSessionTicketParser.parse(new Stream(content))};
+            case HandshakeType.CERTIFICATE:
+                return {...output, ...this._certificateParser.parse(new Stream(content))};
+            case HandshakeType.CERTIFICATE_REQUEST:
+                return {...output, ...this._certificateRequestParser.parse(new Stream(content))};
+            case HandshakeType.CERTIFICATE_VERIFY:
+                return {...output, ...this._certificateVerifyParser.parse(new Stream(content))};
+            default:
+                output.handshakeValue = "0x" + toHexFast(content);
+        }
+
+        return output;
+    }
+}
+
+/**
+ * Represents the known values of the msg_type field of a TLS Handshake message.
+ */
+const HandshakeType = Object.freeze({
+    HELLO_REQUEST: 0,
+    CLIENT_HELLO: 1,
+    SERVER_HELLO: 2,
+    NEW_SESSION_TICKET: 4,
+    CERTIFICATE: 11,
+    SERVER_KEY_EXCHANGE: 12,
+    CERTIFICATE_REQUEST: 13,
+    SERVER_HELLO_DONE: 14,
+    CERTIFICATE_VERIFY: 15,
+    CLIENT_KEY_EXCHANGE: 16,
+    FINISHED: 20,
+});
+
+/**
+ * Parses TLS Handshake ClientHello messages.
+ */
+class ClientHelloParser {
+
+    /**
+     * ClientHelloParser constructor.
+     */
+    constructor() {
+        this._extensionsParser = new ExtensionsParser();
+    }
+
+    /**
+     * Parses a single TLS Handshake ClientHello message.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message.
+     * @returns {Object} Object representation of ClientHello.
+     */
+    parse(input) {
+        const output = {};
+
+        output.clientVersion =  this._readClientVersion(input);
+        output.random = this._readRandom(input);
+
+        const sessionID = this._readSessionID(input);
+        if (sessionID) {
+            output.sessionID = sessionID;
+        }
+
+        output.cipherSuites = this._readCipherSuites(input);
+        output.compressionMethods = this._readCompressionMethods(input);
+        output.extensions = this._readExtensions(input);
+
+        return output;
+    }
+
+    /**
+     * Reads the client_version field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before client_version field.
+     * @returns {string} Hex representation of client_version.
+     */
+    _readClientVersion(input) {
+        return readBytesAsHex(input, 2);
+    }
+
+    /**
+     * Reads the random field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before random field.
+     * @returns {string} Hex representation of random.
+     */
+    _readRandom(input) {
+        return readBytesAsHex(input, 32);
+    }
+
+    /**
+     * Reads the session_id field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before session_id length field.
+     * @returns {string} Hex representation of session_id, or empty string if session_id not present.
+     */
+    _readSessionID(input) {
+        return readSizePrefixedBytesAsHex(input, 1);
+    }
+
+    /**
+     * Reads the cipher_suites field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before cipher_suites length field.
+     * @returns {Object} Object represention of cipher_suites field.
+     */
+    _readCipherSuites(input) {
+        const output = {};
+
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return {};
+        }
+
+        const cipherSuites = new Stream(input.getBytes(output.length));
+        if (cipherSuites.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (cipherSuites.hasMore()) {
+            const cipherSuite = readBytesAsHex(cipherSuites, 2);
+            if (cipherSuite) {
+                output.values.push(cipherSuite);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads the compression_methods field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before compression_methods length field.
+     * @returns {Object} Object representation of compression_methods field.
+     */
+    _readCompressionMethods(input) {
+        const output = {};
+
+        output.length = input.readInt(1);
+        if (!output.length) {
+            return {};
+        }
+
+        const compressionMethods = new Stream(input.getBytes(output.length));
+        if (compressionMethods.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (compressionMethods.hasMore()) {
+            const compressionMethod = readBytesAsHex(compressionMethods, 1);
+            if (compressionMethod) {
+                output.values.push(compressionMethod);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads the extensions field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ClientHello message, with position before extensions length field.
+     * @returns {Object} Object representations of extensions field.
+     */
+    _readExtensions(input) {
+        const output = {};
+
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return {};
+        }
+
+        const extensions = new Stream(input.getBytes(output.length));
+        if (extensions.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = this._extensionsParser.parse(extensions);
+
+        return output;
+    }
+}
+
+/**
+ * Parses TLS Handshake ServeHello messages.
+ */
+class ServerHelloParser {
+
+    /**
+     * ServerHelloParser constructor.
+     */
+    constructor() {
+        this._extensionsParser = new ExtensionsParser();
+    }
+
+    /**
+     *  Parses a single TLS Handshake ServerHello message.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message.
+     * @return {Object} Object representation of ServerHello.
+     */
+    parse(input) {
+        const output = {};
+
+        output.serverVersion = this._readServerVersion(input);
+        output.random = this._readRandom(input);
+
+        const sessionID = this._readSessionID(input);
+        if (sessionID) {
+            output.sessionID = sessionID;
+        }
+
+        output.cipherSuite =  this._readCipherSuite(input);
+        output.compressionMethod = this._readCompressionMethod(input);
+        output.extensions = this._readExtensions(input);
+
+        return output;
+    }
+
+    /**
+     * Reads the server_version field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message, with position before server_version field.
+     * @returns {string} Hex representation of server_version.
+     */
+    _readServerVersion(input) {
+        return readBytesAsHex(input, 2);
+    }
+
+    /**
+     * Reads the random field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message, with position before random field.
+     * @returns {string} Hex representation of random.
+     */
+    _readRandom(input) {
+        return readBytesAsHex(input, 32);
+    }
+
+    /**
+     * Reads the session_id field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServertHello message, with position before session_id length field.
+     * @returns {string} Hex representation of session_id, or empty string if session_id not present.
+     */
+    _readSessionID(input) {
+        return readSizePrefixedBytesAsHex(input, 1);
+    }
+
+    /**
+     * Reads the cipher_suite field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message, with position before cipher_suite field.
+     * @returns {string} Hex represention of cipher_suite.
+     */
+    _readCipherSuite(input) {
+        return readBytesAsHex(input, 2);
+    }
+
+    /**
+     * Reads the compression_method field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message, with position before compression_method field.
+     * @returns {string} Hex represention of compression_method.
+     */
+    _readCompressionMethod(input) {
+        return readBytesAsHex(input, 1);
+    }
+
+    /**
+     * Reads the extensions field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw ServerHello message, with position before extensions length field.
+     * @returns {Object} Object representation of extensions field.
+     */
+    _readExtensions(input) {
+        const output = {};
+
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return {};
+        }
+
+        const extensions = new Stream(input.getBytes(output.length));
+        if (extensions.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = this._extensionsParser.parse(extensions);
+
+        return output;
+    }
+}
+
+/**
+ * Parses TLS Handshake Hello Extensions.
+ */
+class ExtensionsParser {
+
+    /**
+     * Parses a stream of TLS Handshake Hello Extensions.
+     *
+     * @param {Stream} input - Stream, containing multiple raw Extensions, with position before first extension length field.
+     * @returns {Object[]} Array of Object representations of Extensions contained within input.
+     */
+    parse(input) {
+        const output = [];
+
+        while (input.hasMore()) {
+            const extension = this._readExtension(input);
+            if (extension) {
+                output.push(extension);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads a single Extension from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a list of Extensions, with position before the length field of the next Extension.
+     * @returns {Object} Object representation of Extension.
+     */
+    _readExtension(input) {
+        const output = {};
+
+        if (input.position + 4 > input.length) {
+            input.moveTo(input.length);
+            return null;
+        }
+
+        output.type = "0x" + toHexFast(input.getBytes(2));
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return output;
+        }
+
+        const value = input.getBytes(output.length);
+        if (!value || value.length !== output.length) {
+            output.truncated = true;
+        }
+
+        if (value && value.length) {
+            output.value = "0x" + toHexFast(value);
+        }
+
+        return output;
+    }
+}
+
+/**
+ * Parses TLS Handshake NewSessionTicket messages.
+ */
+class NewSessionTicketParser {
+
+    /**
+     * Parses a single TLS Handshake NewSessionTicket message.
+     *
+     * @param {Stream} input - Stream, containing a raw NewSessionTicket message.
+     * @returns {Object} Object representation of NewSessionTicket.
+     */
+    parse(input) {
+        return {
+            ticketLifetimeHint: this._readTicketLifetimeHint(input),
+            ticket: this._readTicket(input),
+        };
+    }
+
+    /**
+     * Reads the ticket_lifetime_hint field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw NewSessionTicket message, with position before ticket_lifetime_hint field.
+     * @returns {string} Lifetime hint, in seconds.
+     */
+    _readTicketLifetimeHint(input) {
+        if (input.position + 4 > input.length) {
+            input.moveTo(input.length);
+            return "";
+        }
+
+        return input.readInt(4) + "s";
+    }
+
+    /**
+     * Reads the ticket field fromt the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw NewSessionTicket message, with position before ticket length field.
+     * @returns {string} Hex representation of ticket.
+     */
+    _readTicket(input) {
+        return readSizePrefixedBytesAsHex(input, 2);
+    }
+}
+
+/**
+ * Parses TLS Handshake Certificate messages.
+ */
+class CertificateParser {
+
+    /**
+     * Parses a single TLS Handshake Certificate message.
+     *
+     * @param {Stream} input - Stream, containing a raw Certificate message.
+     * @returns {Object} Object representation of Certificate.
+     */
+    parse(input) {
+        const output = {};
+
+        output.certificateList = this._readCertificateList(input);
+
+        return output;
+    }
+
+    /**
+     * Reads the certificate_list field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw Certificate message, with position before certificate_list length field.
+     * @returns {string[]} Array of strings, each containing a hex representation of a value within the certificate_list field.
+     */
+    _readCertificateList(input) {
+        const output = {};
+
+        if (input.position + 3 > input.length) {
+            input.moveTo(input.length);
+            return output;
+        }
+
+        output.length = input.readInt(3);
+        if (!output.length) {
+            return output;
+        }
+
+        const certificates = new Stream(input.getBytes(output.length));
+        if (certificates.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (certificates.hasMore()) {
+            const certificate = this._readCertificate(certificates);
+            if (certificate) {
+                output.values.push(certificate);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads a single certificate from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a list of certificicates, with position before the length field of the next certificate.
+     * @returns {string} Hex representation of certificate.
+     */
+    _readCertificate(input) {
+        return readSizePrefixedBytesAsHex(input, 3);
+    }
+}
+
+/**
+ * Parses TLS Handshake CertificateRequest messages.
+ */
+class CertificateRequestParser {
+
+    /**
+     * Parses a single TLS Handshake CertificateRequest message.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateRequest message.
+     * @return {Object} Object representation of CertificateRequest.
+     */
+    parse(input) {
+        const output = {};
+
+        output.certificateTypes = this._readCertificateTypes(input);
+        output.supportedSignatureAlgorithms = this._readSupportedSignatureAlgorithms(input);
+
+        const certificateAuthorities = this._readCertificateAuthorities(input);
+        if (certificateAuthorities.length) {
+            output.certificateAuthorities = certificateAuthorities;
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads the certificate_types field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateRequest message, with position before certificate_types length field.
+     * @return {string[]} Array of strings, each containing a hex representation of a value within the certificate_types field.
+     */
+    _readCertificateTypes(input) {
+        const output = {};
+
+        output.length = input.readInt(1);
+        if (!output.length) {
+            return {};
+        }
+
+        const certificateTypes = new Stream(input.getBytes(output.length));
+        if (certificateTypes.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (certificateTypes.hasMore()) {
+            const certificateType = readBytesAsHex(certificateTypes, 1);
+            if (certificateType) {
+                output.values.push(certificateType);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads the supported_signature_algorithms field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateRequest message, with position before supported_signature_algorithms length field.
+     * @returns {string[]} Array of strings, each containing a hex representation of a value within the supported_signature_algorithms field.
+     */
+    _readSupportedSignatureAlgorithms(input) {
+        const output = {};
+
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return {};
+        }
+
+        const signatureAlgorithms = new Stream(input.getBytes(output.length));
+        if (signatureAlgorithms.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (signatureAlgorithms.hasMore()) {
+            const signatureAlgorithm = readBytesAsHex(signatureAlgorithms, 2);
+            if (signatureAlgorithm) {
+                output.values.push(signatureAlgorithm);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads the certificate_authorities field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateRequest message, with position before certificate_authorities length field.
+     * @returns {string[]} Array of strings, each containing a hex representation of a value within the certificate_authorities field.
+     */
+    _readCertificateAuthorities(input) {
+        const output = {};
+
+        output.length = input.readInt(2);
+        if (!output.length) {
+            return {};
+        }
+
+        const certificateAuthorities = new Stream(input.getBytes(output.length));
+        if (certificateAuthorities.length < output.length) {
+            output.truncated = true;
+        }
+
+        output.values = [];
+
+        while (certificateAuthorities.hasMore()) {
+            const certificateAuthority = this._readCertificateAuthority(certificateAuthorities);
+            if (certificateAuthority) {
+                output.values.push(certificateAuthority);
+            }
+        }
+
+        return output;
+    }
+
+    /**
+     * Reads a single certificate authority from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a list of raw certificate authorities, with position before the length field of the next certificate authority.
+     * @returns {string} Hex representation of certificate authority.
+     */
+    _readCertificateAuthority(input) {
+        return readSizePrefixedBytesAsHex(input, 2);
+    }
+}
+
+/**
+ * Parses TLS Handshake CertificateVerify messages.
+ */
+class CertificateVerifyParser {
+
+    /**
+     * Parses a single CertificateVerify Message.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateVerify message.
+     * @returns {Object} Object representation of CertificateVerify.
+     */
+    parse(input) {
+        return {
+            algorithmHash: this._readAlgorithmHash(input),
+            algorithmSignature: this._readAlgorithmSignature(input),
+            signature: this._readSignature(input),
+        };
+    }
+
+    /**
+     * Reads the algorithm.hash field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateVerify message, with position before algorithm.hash field.
+     * @return {string} Hex representation of hash algorithm.
+     */
+    _readAlgorithmHash(input) {
+        return readBytesAsHex(input, 1);
+    }
+
+    /**
+     * Reads the algorithm.signature field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateVerify message, with position before algorithm.signature field.
+     * @return {string} Hex representation of signature algorithm.
+     */
+    _readAlgorithmSignature(input) {
+        return readBytesAsHex(input, 1);
+    }
+
+    /**
+     * Reads the signature field from the following bytes in the provided Stream.
+     *
+     * @param {Stream} input - Stream, containing a raw CertificateVerify message, with position before signature field.
+     * @return {string} Hex representation of signature.
+     */
+    _readSignature(input) {
+        return readSizePrefixedBytesAsHex(input, 2);
+    }
+}
+
+/**
+ * Read the following size prefixed bytes from the provided Stream, and reuturn as a hex string.
+ *
+ * @param {Stream} input - Stream to read from.
+ * @param {int} sizePrefixLength - Length of the size prefix field.
+ * @returns {string} Hex representation of bytes read from Stream, empty string is returned if
+ *                   field cannot be read in full.
+ */
+function readSizePrefixedBytesAsHex(input, sizePrefixLength) {
+    const length = input.readInt(sizePrefixLength);
+    if (!length) {
+        return "";
+    }
+
+    return readBytesAsHex(input, length);
+}
+
+/**
+ * Read n bytes from the provided Stream, and return as a hex string.
+ *
+ * @param {Stream} input - Stream to read from.
+ * @param {int} n - Number of bytes to read.
+ * @returns {string} Hex representation of bytes read from Stream, or empty string if field cannot
+ *                   be read in full.
+ */
+function readBytesAsHex(input, n) {
+    const bytes = input.getBytes(n);
+    if (!bytes || bytes.length !== n) {
+        return "";
+    }
+
+    return "0x" + toHexFast(bytes);
+}

src/core/operations/ParseX509CRL.mjs

@@ -0,0 +1,391 @@
+/**
+ * @author robinsandhu
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import { fromBase64 } from "../lib/Base64.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { formatDnObj } from "../lib/PublicKey.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
+
+/**
+ * Parse X.509 CRL operation
+ */
+class ParseX509CRL extends Operation {
+
+    /**
+     * ParseX509CRL constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Parse X.509 CRL";
+        this.module = "PublicKey";
+        this.description = "Parse Certificate Revocation List (CRL)";
+        this.infoURL = "https://wikipedia.org/wiki/Certificate_revocation_list";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Input format",
+                "type": "option",
+                "value": ["PEM", "DER Hex", "Base64", "Raw"]
+            }
+        ];
+        this.checks = [
+            {
+                "pattern": "^-+BEGIN X509 CRL-+\\r?\\n[\\da-z+/\\n\\r]+-+END X509 CRL-+\\r?\\n?$",
+                "flags": "i",
+                "args": ["PEM"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string} Human-readable description of a Certificate Revocation List (CRL).
+     */
+    run(input, args) {
+        if (!input.length) {
+            return "No input";
+        }
+
+        const inputFormat = args[0];
+
+        let undefinedInputFormat = false;
+        try {
+            switch (inputFormat) {
+                case "DER Hex":
+                    input = input.replace(/\s/g, "").toLowerCase();
+                    break;
+                case "PEM":
+                    break;
+                case "Base64":
+                    input = toHex(fromBase64(input, null, "byteArray"), "");
+                    break;
+                case "Raw":
+                    input = toHex(Utils.strToArrayBuffer(input), "");
+                    break;
+                default:
+                    undefinedInputFormat = true;
+            }
+        } catch (e) {
+            throw "Certificate load error (non-certificate input?)";
+        }
+        if (undefinedInputFormat) throw "Undefined input format";
+
+        const crl = new r.X509CRL(input);
+
+        let out = `Certificate Revocation List (CRL):
+    Version: ${crl.getVersion() === null ? "1 (0x0)" : "2 (0x1)"}
+    Signature Algorithm: ${crl.getSignatureAlgorithmField()}
+    Issuer:\n${formatDnObj(crl.getIssuer(), 8)}
+    Last Update: ${generalizedDateTimeToUTC(crl.getThisUpdate())}
+    Next Update: ${generalizedDateTimeToUTC(crl.getNextUpdate())}\n`;
+
+        if (crl.getParam().ext !== undefined) {
+            out += `\tCRL extensions:\n${formatCRLExtensions(crl.getParam().ext, 8)}\n`;
+        }
+
+        out += `Revoked Certificates:\n${formatRevokedCertificates(crl.getRevCertArray(), 4)}
+Signature Value:\n${formatCRLSignature(crl.getSignatureValueHex(), 8)}`;
+
+        return out;
+    }
+}
+
+/**
+ * Generalized date time string to UTC.
+ * @param {string} datetime
+ * @returns UTC datetime string.
+ */
+function generalizedDateTimeToUTC(datetime) {
+    // Ensure the string is in the correct format
+    if (!/^\d{12,14}Z$/.test(datetime)) {
+        throw new OperationError(`failed to format datetime string ${datetime}`);
+    }
+
+    // Extract components
+    let centuary = "20";
+    if (datetime.length === 15) {
+        centuary = datetime.substring(0, 2);
+        datetime = datetime.slice(2);
+    }
+    const year = centuary + datetime.substring(0, 2);
+    const month = datetime.substring(2, 4);
+    const day = datetime.substring(4, 6);
+    const hour = datetime.substring(6, 8);
+    const minute = datetime.substring(8, 10);
+    const second = datetime.substring(10, 12);
+
+    // Construct ISO 8601 format string
+    const isoString = `${year}-${month}-${day}T${hour}:${minute}:${second}Z`;
+
+    // Parse using standard Date object
+    const isoDateTime = new Date(isoString);
+
+    return isoDateTime.toUTCString();
+}
+
+/**
+ * Format CRL extensions.
+ * @param {r.ExtParam[] | undefined} extensions
+ * @param {Number} indent
+ * @returns Formatted string detailing CRL extensions.
+ */
+function formatCRLExtensions(extensions, indent) {
+    if (Array.isArray(extensions) === false || extensions.length === 0) {
+        return indentString(`No CRL extensions.`, indent);
+    }
+
+    let out = ``;
+
+    extensions.sort((a, b) => {
+        if (!Object.hasOwn(a, "extname") || !Object.hasOwn(b, "extname")) {
+            return 0;
+        }
+        if (a.extname < b.extname) {
+            return -1;
+        } else if (a.extname === b.extname) {
+            return 0;
+        } else {
+            return 1;
+        }
+    });
+
+    extensions.forEach((ext) => {
+        if (!Object.hasOwn(ext, "extname")) {
+            throw new OperationError(`CRL entry extension object missing 'extname' key: ${ext}`);
+        }
+        switch (ext.extname) {
+            case "authorityKeyIdentifier":
+                out += `X509v3 Authority Key Identifier:\n`;
+                if (Object.hasOwn(ext, "kid")) {
+                    out += `\tkeyid:${colonDelimitedHexFormatString(ext.kid.hex.toUpperCase())}\n`;
+                }
+                if (Object.hasOwn(ext, "issuer")) {
+                    out += `\tDirName:${ext.issuer.str}\n`;
+                }
+                if (Object.hasOwn(ext, "sn")) {
+                    out += `\tserial:${colonDelimitedHexFormatString(ext.sn.hex.toUpperCase())}\n`;
+                }
+                break;
+            case "cRLDistributionPoints":
+                out += `X509v3 CRL Distribution Points:\n`;
+                ext.array.forEach((distPoint) => {
+                    const fullName = `Full Name:\n${formatGeneralNames(distPoint.dpname.full, 4)}`;
+                    out += indentString(fullName, 4) + "\n";
+                });
+                break;
+            case "cRLNumber":
+                if (!Object.hasOwn(ext, "num")) {
+                    throw new OperationError(`'cRLNumber' CRL entry extension missing 'num' key: ${ext}`);
+                }
+                out += `X509v3 CRL Number:\n\t${ext.num.hex.toUpperCase()}\n`;
+                break;
+            case "issuerAltName":
+                out += `X509v3 Issuer Alternative Name:\n${formatGeneralNames(ext.array, 4)}\n`;
+                break;
+            default:
+                out += `${ext.extname}:\n`;
+                out += `\tUnsupported CRL extension. Try openssl CLI.\n`;
+                break;
+        }
+    });
+
+    return indentString(chop(out), indent);
+}
+
+/**
+ * Format general names array.
+ * @param {Object[]} names
+ * @returns Multi-line formatted string describing all supported general name types.
+ */
+function formatGeneralNames(names, indent) {
+    let out = ``;
+
+    names.forEach((name) => {
+        const key = Object.keys(name)[0];
+
+        switch (key) {
+            case "ip":
+                out += `IP:${name.ip}\n`;
+                break;
+            case "dns":
+                out += `DNS:${name.dns}\n`;
+                break;
+            case "uri":
+                out += `URI:${name.uri}\n`;
+                break;
+            case "rfc822":
+                out += `EMAIL:${name.rfc822}\n`;
+                break;
+            case "dn":
+                out += `DIR:${name.dn.str}\n`;
+                break;
+            case "other":
+                out += `OtherName:${name.other.oid}::${Object.values(name.other.value)[0].str}\n`;
+                break;
+            default:
+                out += `${key}: unsupported general name type`;
+                break;
+        }
+    });
+
+    return indentString(chop(out), indent);
+}
+
+/**
+ * Colon-delimited hex formatted output.
+ * @param {string} hexString Hex String
+ * @returns String representing input hex string with colon delimiter.
+ */
+function colonDelimitedHexFormatString(hexString) {
+    if (hexString.length % 2 !== 0) {
+        hexString = "0" + hexString;
+    }
+
+    return chop(hexString.replace(/(..)/g, "$&:"));
+}
+
+/**
+ * Format revoked certificates array
+ * @param {r.RevokedCertificate[] | null} revokedCertificates
+ * @param {Number} indent
+ * @returns Multi-line formatted string output of revoked certificates array
+ */
+function formatRevokedCertificates(revokedCertificates, indent) {
+    if (Array.isArray(revokedCertificates) === false || revokedCertificates.length === 0) {
+        return indentString("No Revoked Certificates.", indent);
+    }
+
+    let out=``;
+
+    revokedCertificates.forEach((revCert) => {
+        if (!Object.hasOwn(revCert, "sn") || !Object.hasOwn(revCert, "date")) {
+            throw new OperationError("invalid revoked certificate object, missing either serial number or date");
+        }
+
+        out += `Serial Number: ${revCert.sn.hex.toUpperCase()}
+    Revocation Date: ${generalizedDateTimeToUTC(revCert.date)}\n`;
+        if (Object.hasOwn(revCert, "ext") && Array.isArray(revCert.ext) && revCert.ext.length !== 0) {
+            out += `\tCRL entry extensions:\n${indentString(formatCRLEntryExtensions(revCert.ext), 2*indent)}\n`;
+        }
+    });
+
+    return indentString(chop(out), indent);
+}
+
+/**
+ * Format CRL entry extensions.
+ * @param {Object[]} exts
+ * @returns Formatted multi-line string describing CRL entry extensions.
+ */
+function formatCRLEntryExtensions(exts) {
+    let out = ``;
+
+    const crlReasonCodeToReasonMessage = {
+        0: "Unspecified",
+        1: "Key Compromise",
+        2: "CA Compromise",
+        3: "Affiliation Changed",
+        4: "Superseded",
+        5: "Cessation Of Operation",
+        6: "Certificate Hold",
+        8: "Remove From CRL",
+        9: "Privilege Withdrawn",
+        10: "AA Compromise",
+    };
+
+    const holdInstructionOIDToName = {
+        "1.2.840.10040.2.1": "Hold Instruction None",
+        "1.2.840.10040.2.2": "Hold Instruction Call Issuer",
+        "1.2.840.10040.2.3": "Hold Instruction Reject",
+    };
+
+    exts.forEach((ext) => {
+        if (!Object.hasOwn(ext, "extname")) {
+            throw new OperationError(`CRL entry extension object missing 'extname' key: ${ext}`);
+        }
+        switch (ext.extname) {
+            case "cRLReason":
+                if (!Object.hasOwn(ext, "code")) {
+                    throw new OperationError(`'cRLReason' CRL entry extension missing 'code' key: ${ext}`);
+                }
+                out += `X509v3 CRL Reason Code:
+    ${Object.hasOwn(crlReasonCodeToReasonMessage, ext.code) ? crlReasonCodeToReasonMessage[ext.code] : `invalid reason code: ${ext.code}`}\n`;
+                break;
+            case "2.5.29.23": // Hold instruction
+                out += `Hold Instruction Code:\n\t${Object.hasOwn(holdInstructionOIDToName, ext.extn.oid) ? holdInstructionOIDToName[ext.extn.oid] : `${ext.extn.oid}: unknown hold instruction OID`}\n`;
+                break;
+            case "2.5.29.24": // Invalidity Date
+                out += `Invalidity Date:\n\t${generalizedDateTimeToUTC(ext.extn.gentime.str)}\n`;
+                break;
+            default:
+                out += `${ext.extname}:\n`;
+                out += `\tUnsupported CRL entry extension. Try openssl CLI.\n`;
+                break;
+        }
+    });
+
+    return chop(out);
+}
+
+/**
+ * Format CRL signature.
+ * @param {String} sigHex
+ * @param {Number} indent
+ * @returns String representing hex signature value formatted on multiple lines.
+ */
+function formatCRLSignature(sigHex, indent) {
+    if (sigHex.length % 2 !== 0) {
+        sigHex = "0" + sigHex;
+    }
+
+    return indentString(formatMultiLine(chop(sigHex.replace(/(..)/g, "$&:"))), indent);
+}
+
+/**
+ * Format string onto multiple lines.
+ * @param {string} longStr
+ * @returns String as a multi-line string.
+ */
+function formatMultiLine(longStr) {
+    const lines = [];
+
+    for (let remain = longStr ; remain !== "" ; remain = remain.substring(54)) {
+        lines.push(remain.substring(0, 54));
+    }
+
+    return lines.join("\n");
+}
+
+/**
+ * Indent a multi-line string by n spaces.
+ * @param {string} input String
+ * @param {number} spaces How many leading spaces
+ * @returns Indented string.
+ */
+function indentString(input, spaces) {
+    const indent = " ".repeat(spaces);
+    return input.replace(/^/gm, indent);
+}
+
+/**
+ * Remove last character from a string.
+ * @param {string} s String
+ * @returns Chopped string.
+ */
+function chop(s) {
+    if (s.length < 1) {
+        return s;
+    }
+    return s.substring(0, s.length - 1);
+}
+
+export default ParseX509CRL;

src/core/operations/PubKeyFromCert.mjs

@@ -0,0 +1,68 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Public Key from Certificate operation
+ */
+class PubKeyFromCert extends Operation {
+
+    /**
+     * PubKeyFromCert constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Public Key from Certificate";
+        this.module = "PublicKey";
+        this.description = "Extracts the Public Key from a Certificate.";
+        this.infoURL = "https://en.wikipedia.org/wiki/X.509";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+        this.checks = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let output = "";
+        let match;
+        const regex = /-----BEGIN CERTIFICATE-----/g;
+        while ((match = regex.exec(input)) !== null) {
+            // find corresponding end tag
+            const indexBase64 = match.index + match[0].length;
+            const footer = "-----END CERTIFICATE-----";
+            const indexFooter = input.indexOf(footer, indexBase64);
+            if (indexFooter === -1) {
+                throw new OperationError(`PEM footer '${footer}' not found`);
+            }
+
+            const certPem = input.substring(match.index, indexFooter + footer.length);
+            const cert = new r.X509();
+            cert.readCertPEM(certPem);
+            let pubKey;
+            try {
+                pubKey = cert.getPublicKey();
+            } catch {
+                throw new OperationError("Unsupported public key type");
+            }
+            const pubKeyPem = r.KEYUTIL.getPEM(pubKey);
+
+            // PEM ends with '\n', so a new key always starts on a new line
+            output += pubKeyPem;
+        }
+        return output;
+    }
+}
+
+export default PubKeyFromCert;

src/core/operations/PubKeyFromPrivKey.mjs

@@ -0,0 +1,82 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Public Key from Private Key operation
+ */
+class PubKeyFromPrivKey extends Operation {
+
+    /**
+     * PubKeyFromPrivKey constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Public Key from Private Key";
+        this.module = "PublicKey";
+        this.description = "Extracts the Public Key from a Private Key.";
+        this.infoURL = "https://en.wikipedia.org/wiki/PKCS_8";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+        this.checks = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let output = "";
+        let match;
+        const regex = /-----BEGIN ((RSA |EC |DSA )?PRIVATE KEY)-----/g;
+        while ((match = regex.exec(input)) !== null) {
+            // find corresponding end tag
+            const indexBase64 = match.index + match[0].length;
+            const footer = `-----END ${match[1]}-----`;
+            const indexFooter = input.indexOf(footer, indexBase64);
+            if (indexFooter === -1) {
+                throw new OperationError(`PEM footer '${footer}' not found`);
+            }
+
+            const privKeyPem = input.substring(match.index, indexFooter + footer.length);
+            let privKey;
+            try {
+                privKey = r.KEYUTIL.getKey(privKeyPem);
+            } catch (err) {
+                throw new OperationError(`Unsupported key type: ${err}`);
+            }
+            let pubKey;
+            if (privKey.type && privKey.type === "EC") {
+                pubKey = new r.KJUR.crypto.ECDSA({ curve: privKey.curve });
+                pubKey.setPublicKeyHex(privKey.generatePublicKeyHex());
+            } else if (privKey.type && privKey.type === "DSA") {
+                if (!privKey.y) {
+                    throw new OperationError(`DSA Private Key in PKCS#8 is not supported`);
+                }
+                pubKey = new r.KJUR.crypto.DSA();
+                pubKey.setPublic(privKey.p, privKey.q, privKey.g, privKey.y);
+            } else if (privKey.n && privKey.e) {
+                pubKey = new r.RSAKey();
+                pubKey.setPublic(privKey.n, privKey.e);
+            } else {
+                throw new OperationError(`Unsupported key type`);
+            }
+            const pubKeyPem = r.KEYUTIL.getPEM(pubKey);
+
+            // PEM ends with '\n', so a new key always starts on a new line
+            output += pubKeyPem;
+        }
+        return output;
+    }
+}
+
+export default PubKeyFromPrivKey;

src/core/operations/RAKE.mjs

@@ -0,0 +1,144 @@
+/**
+ * @author sw5678
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+/**
+ * RAKE operation
+ */
+class RAKE extends Operation {
+
+    /**
+     * RAKE constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "RAKE";
+        this.module = "Default";
+        this.description = [
+            "Rapid Keyword Extraction (RAKE)",
+            "<br><br>",
+            "RAKE is a domain-independent keyword extraction algorithm in Natural Language Processing.",
+            "<br><br>",
+            "The list of stop words are from the NLTK python package",
+        ].join("\n");
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Word Delimiter (Regex)",
+                type: "text",
+                value: "\\s"
+            },
+            {
+                name: "Sentence Delimiter (Regex)",
+                type: "text",
+                value: "\\.\\s|\\n"
+            },
+            {
+                name: "Stop Words",
+                type: "text",
+                value: "i,me,my,myself,we,our,ours,ourselves,you,you're,you've,you'll,you'd,your,yours,yourself,yourselves,he,him,his,himself,she,she's,her,hers,herself,it,it's,its,itsef,they,them,their,theirs,themselves,what,which,who,whom,this,that,that'll,these,those,am,is,are,was,were,be,been,being,have,has,had,having,do,does',did,doing,a,an,the,and,but,if,or,because,as,until,while,of,at,by,for,with,about,against,between,into,through,during,before,after,above,below,to,from,up,down,in,out,on,off,over,under,again,further,then,once,here,there,when,where,why,how,all,any,both,each,few,more,most,other,some,such,no,nor,not,only,own,same,so,than,too,very,s,t,can,will,just,don,don't,should,should've,now,d,ll,m,o,re,ve,y,ain,aren,aren't,couldn,couldn't,didn,didn't,doesn,doesn't,hadn,hadn't,hasn,hasn't,haven,haven't,isn,isn't,ma,mightn,mightn't,mustn,mustn't,needn,needn't,shan,shan't,shouldn,shouldn't,wasn,wasn't,weren,weren't,won,won't,wouldn,wouldn't"
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+
+        // Get delimiter regexs
+        const wordDelim =  new RegExp(args[0], "g");
+        const sentDelim = new RegExp(args[1], "g");
+
+        // Deduplicate the stop words and add the empty string
+        const stopWords = args[2].toLowerCase().replace(/ /g, "").split(",").unique();
+        stopWords.push("");
+
+        // Lower case input and remove start and ending whitespace
+        input = input.toLowerCase().trim();
+
+        // Get tokens, token count, and phrases
+        const tokens = [];
+        const wordFrequencies = [];
+        let phrases = [];
+
+        // Build up list of phrases and token counts
+        const sentences = input.split(sentDelim);
+        for (const sent of sentences) {
+
+            // Split sentence into words
+            const splitSent = sent.split(wordDelim);
+            let startIndex = 0;
+
+            for (let i = 0; i < splitSent.length; i++) {
+                const token = splitSent[i];
+                if (stopWords.includes(token)) {
+                    // If token is stop word then split to create phrase
+                    phrases.push(splitSent.slice(startIndex, i));
+                    startIndex = i + 1;
+                } else {
+                    // If token is not a stop word add to the count of the list of words
+                    if (tokens.includes(token)) {
+                        wordFrequencies[tokens.indexOf(token)]+=1;
+                    } else {
+                        tokens.push(token);
+                        wordFrequencies.push(1);
+                    }
+                }
+            }
+            phrases.push(splitSent.slice(startIndex));
+        }
+
+        // remove empty phrases
+        phrases = phrases.filter(subArray => subArray.length > 0);
+
+        // Remove duplicate phrases
+        phrases = phrases.unique();
+
+        // Generate word_degree_matrix and populate
+        const wordDegreeMatrix = Array(tokens.length).fill().map(() => Array(tokens.length).fill(0));
+        for (const phrase of phrases) {
+            for (const word1 of phrase) {
+                for (const word2 of phrase) {
+                    wordDegreeMatrix[tokens.indexOf(word1)][tokens.indexOf(word2)]++;
+                }
+            }
+        }
+
+        // Calculate degree score for each token
+        const degreeScores = Array(tokens.length).fill(0);
+        for (let i=0; i<tokens.length; i++) {
+            let wordDegree = 0;
+            for (let j=0; j<wordDegreeMatrix.length; j++) {
+                wordDegree += wordDegreeMatrix[j][i];
+            }
+            degreeScores[i] = wordDegree / wordFrequencies[i];
+        }
+
+        // Calculate score for each phrase
+        const scores = phrases.map(function (phrase) {
+            let score = 0;
+            phrase.forEach(function (token) {
+                score += degreeScores[tokens.indexOf(token)];
+            });
+            return new Array(score, phrase.join(" "));
+        });
+        scores.sort((a, b) => b[0] - a[0]);
+        scores.unshift(new Array("Scores: ", "Keywords: "));
+
+        // Output works with the 'To Table' functionality already built into CC
+        return scores.map(function (score) {
+            return score.join(", ");
+        }).join("\n");
+    }
+}
+
+export default RAKE;

src/core/operations/ROT13.mjs

@@ -59,15 +59,16 @@ class ROT13 extends Operation {
             rot13Upperacse = args[1],
             rotNumbers = args[2];
         let amount = args[3],
-            chr;
+            amountNumbers = args[3];
 
         if (amount) {
             if (amount < 0) {
                 amount = 26 - (Math.abs(amount) % 26);
+                amountNumbers = 10 - (Math.abs(amountNumbers) % 10);
             }
 
             for (let i = 0; i < input.length; i++) {
-                chr = input[i];
+                let chr = input[i];
                 if (rot13Upperacse && chr >= 65 && chr <= 90) { // Upper case
                     chr = (chr - 65 + amount) % 26;
                     output[i] = chr + 65;
@@ -75,7 +76,7 @@ class ROT13 extends Operation {
                     chr = (chr - 97 + amount) % 26;
                     output[i] = chr + 97;
                 } else if (rotNumbers && chr >= 48 && chr <= 57) { // Numbers
-                    chr = (chr - 48 + amount) % 10;
+                    chr = (chr - 48 + amountNumbers) % 10;
                     output[i] = chr + 48;
                 }
             }

src/core/operations/RSASign.mjs

@@ -60,7 +60,7 @@ class RSASign extends Operation {
             const privateKey = forge.pki.decryptRsaPrivateKey(key, password);
             // Generate message hash
             const md = MD_ALGORITHMS[mdAlgo].create();
-            md.update(input, "utf8");
+            md.update(input, "raw");
             // Sign message hash
             const sig = privateKey.sign(md);
             return sig;

src/core/operations/RSAVerify.mjs

@@ -8,6 +8,7 @@ import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import forge from "node-forge";
 import { MD_ALGORITHMS } from "../lib/RSA.mjs";
+import Utils from "../Utils.mjs";
 
 /**
  * RSA Verify operation
@@ -37,6 +38,11 @@ class RSAVerify extends Operation {
                 type: "text",
                 value: ""
             },
+            {
+                name: "Message format",
+                type: "option",
+                value: ["Raw", "Hex", "Base64"]
+            },
             {
                 name: "Message Digest Algorithm",
                 type: "option",
@@ -51,7 +57,7 @@ class RSAVerify extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        const [pemKey, message, mdAlgo] = args;
+        const [pemKey, message, format, mdAlgo] = args;
         if (pemKey.replace("-----BEGIN RSA PUBLIC KEY-----", "").length === 0) {
             throw new OperationError("Please enter a public key.");
         }
@@ -60,7 +66,8 @@ class RSAVerify extends Operation {
             const pubKey = forge.pki.publicKeyFromPem(pemKey);
             // Generate message digest
             const md = MD_ALGORITHMS[mdAlgo].create();
-            md.update(message, "utf8");
+            const messageStr = Utils.convertToByteString(message, format);
+            md.update(messageStr, "raw");
             // Compare signed message digest and generated message digest
             const result = pubKey.verify(md.digest().bytes(), input);
             return result ? "Verified OK" : "Verification Failure";

src/core/operations/RandomizeColourPalette.mjs

@@ -10,7 +10,7 @@ import Utils from "../Utils.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { runHash } from "../lib/Hash.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Randomize Colour Palette operation
@@ -48,7 +48,7 @@ class RandomizeColourPalette extends Operation {
         if (!isImage(input)) throw new OperationError("Please enter a valid image file.");
 
         const seed = args[0] || (Math.random().toString().substr(2)),
-            parsedImage = await jimp.read(input),
+            parsedImage = await Jimp.read(input),
             width = parsedImage.bitmap.width,
             height = parsedImage.bitmap.height;
 
@@ -61,7 +61,7 @@ class RandomizeColourPalette extends Operation {
             parsedImage.setPixelColor(parseInt(rgbHex, 16), x, y);
         });
 
-        const imageBuffer = await parsedImage.getBufferAsync(jimp.AUTO);
+        const imageBuffer = await parsedImage.getBufferAsync(Jimp.AUTO);
 
         return new Uint8Array(imageBuffer).buffer;
     }

src/core/operations/RegularExpression.mjs

@@ -67,6 +67,10 @@ class RegularExpression extends Operation {
                         name: "MAC address",
                         value: "[A-Fa-f\\d]{2}(?:[:-][A-Fa-f\\d]{2}){5}"
                     },
+                    {
+                        name: "UUID",
+                        value: "[0-9a-fA-F]{8}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{12}"
+                    },
                     {
                         name: "Date (yyyy-mm-dd)",
                         value: "((?:19|20)\\d\\d)[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])"
@@ -83,10 +87,6 @@ class RegularExpression extends Operation {
                         name: "Strings",
                         value: "[A-Za-z\\d/\\-:.,_$%\\x27\"()<>= !\\[\\]{}@]{4,}"
                     },
-                    {
-                        name: "UUID (any version)",
-                        value: "[0-9a-fA-F]{8}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{4}\\b-[0-9a-fA-F]{12}"
-                    },
                 ],
                 "target": 1
             },

src/core/operations/ResizeImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Resize Image operation
@@ -80,11 +80,11 @@ class ResizeImage extends Operation {
             resizeAlg = args[4];
 
         const resizeMap = {
-            "Nearest Neighbour": jimp.RESIZE_NEAREST_NEIGHBOR,
-            "Bilinear": jimp.RESIZE_BILINEAR,
-            "Bicubic": jimp.RESIZE_BICUBIC,
-            "Hermite": jimp.RESIZE_HERMITE,
-            "Bezier": jimp.RESIZE_BEZIER
+            "Nearest Neighbour": Jimp.RESIZE_NEAREST_NEIGHBOR,
+            "Bilinear": Jimp.RESIZE_BILINEAR,
+            "Bicubic": Jimp.RESIZE_BICUBIC,
+            "Hermite": Jimp.RESIZE_HERMITE,
+            "Bezier": Jimp.RESIZE_BEZIER
         };
 
         if (!isImage(input)) {
@@ -93,7 +93,7 @@ class ResizeImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -113,9 +113,9 @@ class ResizeImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/RisonDecode.mjs

@@ -0,0 +1,57 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import rison from "rison";
+
+/**
+ * Rison Decode operation
+ */
+class RisonDecode extends Operation {
+
+    /**
+     * RisonDecode constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Rison Decode";
+        this.module = "Encodings";
+        this.description = "Rison, a data serialization format optimized for compactness in URIs. Rison is a slight variation of JSON that looks vastly superior after URI encoding. Rison still expresses exactly the same set of data structures as JSON, so data can be translated back and forth without loss or guesswork.";
+        this.infoURL = "https://github.com/Nanonid/rison";
+        this.inputType = "string";
+        this.outputType = "Object";
+        this.args = [
+            {
+                name: "Decode Option",
+                type: "editableOption",
+                value: ["Decode", "Decode Object", "Decode Array"]
+            },
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {Object}
+     */
+    run(input, args) {
+        const [decodeOption] = args;
+        switch (decodeOption) {
+            case "Decode":
+                return rison.decode(input);
+            case "Decode Object":
+                return rison.decode_object(input);
+            case "Decode Array":
+                return rison.decode_array(input);
+            default:
+                throw new OperationError("Invalid Decode option");
+        }
+    }
+}
+
+export default RisonDecode;

src/core/operations/RisonEncode.mjs

@@ -0,0 +1,59 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import rison from "rison";
+
+/**
+ * Rison Encode operation
+ */
+class RisonEncode extends Operation {
+
+    /**
+     * RisonEncode constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Rison Encode";
+        this.module = "Encodings";
+        this.description = "Rison, a data serialization format optimized for compactness in URIs. Rison is a slight variation of JSON that looks vastly superior after URI encoding. Rison still expresses exactly the same set of data structures as JSON, so data can be translated back and forth without loss or guesswork.";
+        this.infoURL = "https://github.com/Nanonid/rison";
+        this.inputType = "Object";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Encode Option",
+                type: "option",
+                value: ["Encode", "Encode Object", "Encode Array", "Encode URI"]
+            },
+        ];
+    }
+
+    /**
+     * @param {Object} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [encodeOption] = args;
+        switch (encodeOption) {
+            case "Encode":
+                return rison.encode(input);
+            case "Encode Object":
+                return rison.encode_object(input);
+            case "Encode Array":
+                return rison.encode_array(input);
+            case "Encode URI":
+                return rison.encode_uri(input);
+            default:
+                throw new OperationError("Invalid encode option");
+        }
+    }
+}
+
+export default RisonEncode;

src/core/operations/RotateImage.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Rotate Image operation
@@ -52,7 +52,7 @@ class RotateImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -63,9 +63,9 @@ class RotateImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/SIGABA.mjs

@@ -40,7 +40,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "1st cipher rotor intial value",
+                name: "1st cipher rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -56,7 +56,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "2nd cipher rotor intial value",
+                name: "2nd cipher rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -72,7 +72,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "3rd cipher rotor intial value",
+                name: "3rd cipher rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -88,7 +88,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "4th cipher rotor intial value",
+                name: "4th cipher rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -104,7 +104,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "5th cipher rotor intial value",
+                name: "5th cipher rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -120,7 +120,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "1st control rotor intial value",
+                name: "1st control rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -136,7 +136,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "2nd control rotor intial value",
+                name: "2nd control rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -152,7 +152,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "3rd control rotor intial value",
+                name: "3rd control rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -168,7 +168,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "4th control rotor intial value",
+                name: "4th control rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -184,7 +184,7 @@ class Sigaba extends Operation {
                 value: false
             },
             {
-                name: "5th control rotor intial value",
+                name: "5th control rotor initial value",
                 type: "option",
                 value: LETTERS
             },
@@ -195,7 +195,7 @@ class Sigaba extends Operation {
                 defaultIndex: 0
             },
             {
-                name: "1st index rotor intial value",
+                name: "1st index rotor initial value",
                 type: "option",
                 value: NUMBERS
             },
@@ -206,7 +206,7 @@ class Sigaba extends Operation {
                 defaultIndex: 0
             },
             {
-                name: "2nd index rotor intial value",
+                name: "2nd index rotor initial value",
                 type: "option",
                 value: NUMBERS
             },
@@ -217,7 +217,7 @@ class Sigaba extends Operation {
                 defaultIndex: 0
             },
             {
-                name: "3rd index rotor intial value",
+                name: "3rd index rotor initial value",
                 type: "option",
                 value: NUMBERS
             },
@@ -228,7 +228,7 @@ class Sigaba extends Operation {
                 defaultIndex: 0
             },
             {
-                name: "4th index rotor intial value",
+                name: "4th index rotor initial value",
                 type: "option",
                 value: NUMBERS
             },
@@ -239,7 +239,7 @@ class Sigaba extends Operation {
                 defaultIndex: 0
             },
             {
-                name: "5th index rotor intial value",
+                name: "5th index rotor initial value",
                 type: "option",
                 value: NUMBERS
             },

src/core/operations/Salsa20.mjs

@@ -0,0 +1,154 @@
+/**
+ * @author joostrijneveld [joost@joostrijneveld.nl]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { salsa20Block } from "../lib/Salsa20.mjs";
+
+/**
+ * Salsa20 operation
+ */
+class Salsa20 extends Operation {
+
+    /**
+     * Salsa20 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Salsa20";
+        this.module = "Ciphers";
+        this.description = "Salsa20 is a stream cipher designed by Daniel J. Bernstein and submitted to the eSTREAM project; Salsa20/8 and Salsa20/12 are round-reduced variants. It is closely related to the ChaCha stream cipher.<br><br><b>Key:</b> Salsa20 uses a key of 16 or 32 bytes (128 or 256 bits).<br><br><b>Nonce:</b> Salsa20 uses a nonce of 8 bytes (64 bits).<br><br><b>Counter:</b> Salsa uses a counter of 8 bytes (64 bits). The counter starts at zero at the start of the keystream, and is incremented at every 64 bytes.";
+        this.infoURL = "https://wikipedia.org/wiki/Salsa20";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Nonce",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64", "Integer"]
+            },
+            {
+                "name": "Counter",
+                "type": "number",
+                "value": 0,
+                "min": 0
+            },
+            {
+                "name": "Rounds",
+                "type": "option",
+                "value": ["20", "12", "8"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            nonceType = args[1].option,
+            rounds = parseInt(args[3], 10),
+            inputType = args[4],
+            outputType = args[5];
+
+        if (key.length !== 16 && key.length !== 32) {
+            throw new OperationError(`Invalid key length: ${key.length} bytes.
+
+Salsa20 uses a key of 16 or 32 bytes (128 or 256 bits).`);
+        }
+
+        let counter, nonce;
+        if (nonceType === "Integer") {
+            nonce = Utils.intToByteArray(parseInt(args[1].string, 10), 8, "little");
+        } else {
+            nonce = Utils.convertToByteArray(args[1].string, args[1].option);
+            if (!(nonce.length === 8)) {
+                throw new OperationError(`Invalid nonce length: ${nonce.length} bytes.
+
+Salsa20 uses a nonce of 8 bytes (64 bits).`);
+            }
+        }
+        counter = Utils.intToByteArray(args[2], 8, "little");
+
+        const output = [];
+        input = Utils.convertToByteArray(input, inputType);
+
+        let counterAsInt = Utils.byteArrayToInt(counter, "little");
+        for (let i = 0; i < input.length; i += 64) {
+            counter = Utils.intToByteArray(counterAsInt, 8, "little");
+            const stream = salsa20Block(key, nonce, counter, rounds);
+            for (let j = 0; j < 64 && i + j < input.length; j++) {
+                output.push(input[i + j] ^ stream[j]);
+            }
+            counterAsInt++;
+        }
+
+        if (outputType === "Hex") {
+            return toHex(output);
+        } else {
+            return Utils.arrayBufferToStr(Uint8Array.from(output).buffer);
+        }
+    }
+
+    /**
+     * Highlight Salsa20
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlight(pos, args) {
+        const inputType = args[4],
+            outputType = args[5];
+        if (inputType === "Raw" && outputType === "Raw") {
+            return pos;
+        }
+    }
+
+    /**
+     * Highlight Salsa20 in reverse
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlightReverse(pos, args) {
+        const inputType = args[4],
+            outputType = args[5];
+        if (inputType === "Raw" && outputType === "Raw") {
+            return pos;
+        }
+    }
+
+}
+
+export default Salsa20;

src/core/operations/SharpenImage.mjs

@@ -10,7 +10,7 @@ import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
 import { gaussianBlur } from "../lib/ImageManipulation.mjs";
 import { isWorkerEnvironment } from "../Utils.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Sharpen Image operation
@@ -68,7 +68,7 @@ class SharpenImage extends Operation {
 
         let image;
         try {
-            image = await jimp.read(input);
+            image = await Jimp.read(input);
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
@@ -137,9 +137,9 @@ class SharpenImage extends Operation {
 
             let imageBuffer;
             if (image.getMIME() === "image/gif") {
-                imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
+                imageBuffer = await image.getBufferAsync(Jimp.MIME_PNG);
             } else {
-                imageBuffer = await image.getBufferAsync(jimp.AUTO);
+                imageBuffer = await image.getBufferAsync(Jimp.AUTO);
             }
             return imageBuffer.buffer;
         } catch (err) {

src/core/operations/SplitColourChannels.mjs

@@ -8,7 +8,7 @@ import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import Utils from "../Utils.mjs";
 import {isImage} from "../lib/FileType.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * Split Colour Channels operation
@@ -41,7 +41,7 @@ class SplitColourChannels extends Operation {
         // Make sure that the input is an image
         if (!isImage(input)) throw new OperationError("Invalid file type.");
 
-        const parsedImage = await jimp.read(Buffer.from(input));
+        const parsedImage = await Jimp.read(Buffer.from(input));
 
         const red = new Promise(async (resolve, reject) => {
             try {
@@ -51,7 +51,7 @@ class SplitColourChannels extends Operation {
                         {apply: "blue", params: [-255]},
                         {apply: "green", params: [-255]}
                     ])
-                    .getBufferAsync(jimp.MIME_PNG);
+                    .getBufferAsync(Jimp.MIME_PNG);
                 resolve(new File([new Uint8Array((await split).values())], "red.png", {type: "image/png"}));
             } catch (err) {
                 reject(new OperationError(`Could not split red channel: ${err}`));
@@ -64,7 +64,7 @@ class SplitColourChannels extends Operation {
                     .color([
                         {apply: "red", params: [-255]},
                         {apply: "blue", params: [-255]},
-                    ]).getBufferAsync(jimp.MIME_PNG);
+                    ]).getBufferAsync(Jimp.MIME_PNG);
                 resolve(new File([new Uint8Array((await split).values())], "green.png", {type: "image/png"}));
             } catch (err) {
                 reject(new OperationError(`Could not split green channel: ${err}`));
@@ -77,7 +77,7 @@ class SplitColourChannels extends Operation {
                     .color([
                         {apply: "red", params: [-255]},
                         {apply: "green", params: [-255]},
-                    ]).getBufferAsync(jimp.MIME_PNG);
+                    ]).getBufferAsync(Jimp.MIME_PNG);
                 resolve(new File([new Uint8Array((await split).values())], "blue.png", {type: "image/png"}));
             } catch (err) {
                 reject(new OperationError(`Could not split blue channel: ${err}`));

src/core/operations/StripIPv4Header.mjs

@@ -0,0 +1,57 @@
+/**
+ * @author c65722 []
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Stream from "../lib/Stream.mjs";
+
+/**
+ * Strip IPv4 header operation
+ */
+class StripIPv4Header extends Operation {
+
+    /**
+     * StripIPv4Header constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Strip IPv4 header";
+        this.module = "Default";
+        this.description = "Strips the IPv4 header from an IPv4 packet, outputting the payload.";
+        this.infoURL = "https://wikipedia.org/wiki/IPv4";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "ArrayBuffer";
+        this.args = [];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {ArrayBuffer}
+     */
+    run(input, args) {
+        const MIN_HEADER_LEN = 20;
+
+        const s = new Stream(new Uint8Array(input));
+        if (s.length < MIN_HEADER_LEN) {
+            throw new OperationError("Input length is less than minimum IPv4 header length");
+        }
+
+        const ihl = s.readInt(1) & 0x0f;
+        const dataOffsetBytes = ihl * 4;
+        if (s.length < dataOffsetBytes) {
+            throw new OperationError("Input length is less than IHL");
+        }
+
+        s.moveTo(dataOffsetBytes);
+
+        return s.getBytes().buffer;
+    }
+
+}
+
+export default StripIPv4Header;

src/core/operations/StripTCPHeader.mjs

@@ -0,0 +1,60 @@
+/**
+ * @author c65722 []
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Stream from "../lib/Stream.mjs";
+
+/**
+ * Strip TCP header operation
+ */
+class StripTCPHeader extends Operation {
+
+    /**
+     * StripTCPHeader constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Strip TCP header";
+        this.module = "Default";
+        this.description = "Strips the TCP header from a TCP segment, outputting the payload.";
+        this.infoURL = "https://wikipedia.org/wiki/Transmission_Control_Protocol";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "ArrayBuffer";
+        this.args = [];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {ArrayBuffer}
+     */
+    run(input, args) {
+        const MIN_HEADER_LEN = 20;
+        const DATA_OFFSET_OFFSET = 12;
+        const DATA_OFFSET_LEN_BITS = 4;
+
+        const s = new Stream(new Uint8Array(input));
+        if (s.length < MIN_HEADER_LEN) {
+            throw new OperationError("Need at least 20 bytes for a TCP Header");
+        }
+
+        s.moveTo(DATA_OFFSET_OFFSET);
+        const dataOffsetWords = s.readBits(DATA_OFFSET_LEN_BITS);
+        const dataOffsetBytes = dataOffsetWords * 4;
+        if (s.length < dataOffsetBytes) {
+            throw new OperationError("Input length is less than data offset");
+        }
+
+        s.moveTo(dataOffsetBytes);
+
+        return s.getBytes().buffer;
+    }
+
+}
+
+export default StripTCPHeader;

src/core/operations/StripUDPHeader.mjs

@@ -0,0 +1,51 @@
+/**
+ * @author c65722 []
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Stream from "../lib/Stream.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Strip UDP header operation
+ */
+class StripUDPHeader extends Operation {
+
+    /**
+     * StripUDPHeader constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Strip UDP header";
+        this.module = "Default";
+        this.description = "Strips the UDP header from a UDP datagram, outputting the payload.";
+        this.infoURL = "https://wikipedia.org/wiki/User_Datagram_Protocol";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "ArrayBuffer";
+        this.args = [];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {ArrayBuffer}
+     */
+    run(input, args) {
+        const HEADER_LEN = 8;
+
+        const s = new Stream(new Uint8Array(input));
+        if (s.length < HEADER_LEN) {
+            throw new OperationError("Need 8 bytes for a UDP Header");
+        }
+
+        s.moveTo(HEADER_LEN);
+
+        return s.getBytes().buffer;
+    }
+
+}
+
+export default StripUDPHeader;

src/core/operations/TakeNthBytes.mjs

@@ -0,0 +1,79 @@
+/**
+ * @author Oshawk [oshawk@protonmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Take nth bytes operation
+ */
+class TakeNthBytes extends Operation {
+
+    /**
+     * TakeNthBytes constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Take nth bytes";
+        this.module = "Default";
+        this.description = "Takes every nth byte starting with a given byte.";
+        this.infoURL = "";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                name: "Take every",
+                type: "number",
+                value: 4
+            },
+            {
+                name: "Starting at",
+                type: "number",
+                value: 0
+            },
+            {
+                name: "Apply to each line",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const n = args[0];
+        const start = args[1];
+        const eachLine = args[2];
+
+        if (parseInt(n, 10) !== n || n <= 0) {
+            throw new OperationError("'Take every' must be a positive integer.");
+        }
+        if (parseInt(start, 10) !== start || start < 0) {
+            throw new OperationError("'Starting at' must be a positive or zero integer.");
+        }
+
+        let offset = 0;
+        const output = [];
+        for (let i = 0; i < input.length; i++) {
+            if (eachLine && input[i] === 0x0a) {
+                output.push(0x0a);
+                offset = i + 1;
+            } else if (i - offset >= start && (i - (start + offset)) % n === 0) {
+                output.push(input[i]);
+            }
+        }
+
+        return output;
+    }
+
+}
+
+export default TakeNthBytes;

src/core/operations/ToBase58.mjs

@@ -43,7 +43,7 @@ class ToBase58 extends Operation {
     run(input, args) {
         input = new Uint8Array(input);
         let alphabet = args[0] || ALPHABET_OPTIONS[0].value,
-            result = [0];
+            result = [];
 
         alphabet = Utils.expandAlphRange(alphabet).join("");
 
@@ -60,11 +60,9 @@ class ToBase58 extends Operation {
         }
 
         input.forEach(function(b) {
-            let carry = (result[0] << 8) + b;
-            result[0] = carry % 58;
-            carry = (carry / 58) | 0;
+            let carry = b;
 
-            for (let i = 1; i < result.length; i++) {
+            for (let i = 0; i < result.length; i++) {
                 carry += result[i] << 8;
                 result[i] = carry % 58;
                 carry = (carry / 58) | 0;

src/core/operations/ToBase92.mjs

@@ -0,0 +1,67 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import { base92Chr } from "../lib/Base92.mjs";
+import Operation from "../Operation.mjs";
+
+/**
+ * To Base92 operation
+ */
+class ToBase92 extends Operation {
+    /**
+     * ToBase92 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To Base92";
+        this.module = "Default";
+        this.description = "Base92 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.";
+        this.infoURL = "https://wikipedia.org/wiki/List_of_numeral_systems";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const res = [];
+        let bitString = "";
+
+        while (input.length > 0) {
+            while (bitString.length < 13 && input.length > 0) {
+                bitString += input[0].charCodeAt(0).toString(2).padStart(8, "0");
+                input = input.slice(1);
+            }
+            if (bitString.length < 13)
+                break;
+            const i = parseInt(bitString.slice(0, 13), 2);
+            res.push(base92Chr(Math.floor(i / 91)));
+            res.push(base92Chr(i % 91));
+            bitString = bitString.slice(13);
+        }
+
+        if (bitString.length > 0) {
+            if (bitString.length < 7) {
+                bitString = bitString.padEnd(6, "0");
+                res.push(base92Chr(parseInt(bitString, 2)));
+            } else {
+                bitString = bitString.padEnd(13, "0");
+                const i = parseInt(bitString.slice(0, 13), 2);
+                res.push(base92Chr(Math.floor(i / 91)));
+                res.push(base92Chr(i % 91));
+            }
+        }
+
+        return res;
+
+    }
+}
+
+export default ToBase92;

src/core/operations/ToFloat.mjs

@@ -0,0 +1,80 @@
+/**
+ * @author tcode2k16 [tcode2k16@gmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
+import ieee754 from "ieee754";
+import {DELIM_OPTIONS} from "../lib/Delim.mjs";
+
+/**
+ * To Float operation
+ */
+class ToFloat extends Operation {
+
+    /**
+     * ToFloat constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To Float";
+        this.module = "Default";
+        this.description = "Convert to IEEE754 Floating Point Numbers";
+        this.infoURL = "https://wikipedia.org/wiki/IEEE_754";
+        this.inputType = "byteArray";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Endianness",
+                "type": "option",
+                "value": [
+                    "Big Endian",
+                    "Little Endian"
+                ]
+            },
+            {
+                "name": "Size",
+                "type": "option",
+                "value": [
+                    "Float (4 bytes)",
+                    "Double (8 bytes)"
+                ]
+            },
+            {
+                "name": "Delimiter",
+                "type": "option",
+                "value": DELIM_OPTIONS
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [endianness, size, delimiterName] = args;
+        const delim = Utils.charRep(delimiterName || "Space");
+        const byteSize = size === "Double (8 bytes)" ? 8 : 4;
+        const isLE = endianness === "Little Endian";
+        const mLen = byteSize === 4 ? 23 : 52;
+
+        if (input.length % byteSize !== 0) {
+            throw new OperationError(`Input is not a multiple of ${byteSize}`);
+        }
+
+        const output = [];
+        for (let i = 0; i < input.length; i+=byteSize) {
+            output.push(ieee754.read(input, i, isLE, mLen, byteSize));
+        }
+        return output.join(delim);
+    }
+
+}
+
+export default ToFloat;

src/core/operations/ToModhex.mjs

@@ -0,0 +1,55 @@
+/**
+ * @author linuxgemini [ilteris@asenkron.com.tr]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import { TO_MODHEX_DELIM_OPTIONS, toModhex } from "../lib/Modhex.mjs";
+import Utils from "../Utils.mjs";
+
+/**
+ * To Modhex operation
+ */
+class ToModhex extends Operation {
+
+    /**
+     * ToModhex constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To Modhex";
+        this.module = "Default";
+        this.description = "Converts the input string to modhex bytes separated by the specified delimiter.";
+        this.infoURL = "https://en.wikipedia.org/wiki/YubiKey#ModHex";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Delimiter",
+                type: "option",
+                value: TO_MODHEX_DELIM_OPTIONS
+            },
+            {
+                name: "Bytes per line",
+                type: "number",
+                value: 0
+            }
+        ];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const delim = Utils.charRep(args[0]);
+        const lineSize = args[1];
+
+        return toModhex(new Uint8Array(input), delim, 2, "", lineSize);
+    }
+}
+
+export default ToModhex;

src/core/operations/TripleDESDecrypt.mjs

@@ -22,7 +22,7 @@ class TripleDESDecrypt extends Operation {
 
         this.name = "Triple DES Decrypt";
         this.module = "Ciphers";
-        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
+        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
         this.infoURL = "https://wikipedia.org/wiki/Triple_DES";
         this.inputType = "string";
         this.outputType = "string";
@@ -73,8 +73,7 @@ class TripleDESDecrypt extends Operation {
         if (key.length !== 24 && key.length !== 16) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-Triple DES uses a key length of 24 bytes (192 bits).
-DES uses a key length of 8 bytes (64 bits).`);
+Triple DES uses a key length of 24 bytes (192 bits).`);
         }
         if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes

src/core/operations/TripleDESEncrypt.mjs

@@ -22,7 +22,7 @@ class TripleDESEncrypt extends Operation {
 
         this.name = "Triple DES Encrypt";
         this.module = "Ciphers";
-        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br>You can generate a password-based key using one of the KDF operations.<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
+        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br><br>You can generate a password-based key using one of the KDF operations.<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
         this.infoURL = "https://wikipedia.org/wiki/Triple_DES";
         this.inputType = "string";
         this.outputType = "string";
@@ -72,8 +72,7 @@ class TripleDESEncrypt extends Operation {
         if (key.length !== 24 && key.length !== 16) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-Triple DES uses a key length of 24 bytes (192 bits).
-DES uses a key length of 8 bytes (64 bits).`);
+Triple DES uses a key length of 24 bytes (192 bits).`);
         }
         if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes

src/core/operations/ViewBitPlane.mjs

@@ -9,7 +9,7 @@ import OperationError from "../errors/OperationError.mjs";
 import Utils from "../Utils.mjs";
 import { isImage } from "../lib/FileType.mjs";
 import { toBase64 } from "../lib/Base64.mjs";
-import jimp from "jimp";
+import Jimp from "jimp/es/index.js";
 
 /**
  * View Bit Plane operation
@@ -52,7 +52,7 @@ class ViewBitPlane extends Operation {
         if (!isImage(input)) throw new OperationError("Please enter a valid image file.");
 
         const [colour, bit] = args,
-            parsedImage = await jimp.read(input),
+            parsedImage = await Jimp.read(input),
             width = parsedImage.bitmap.width,
             height = parsedImage.bitmap.height,
             colourIndex = COLOUR_OPTIONS.indexOf(colour),
@@ -78,7 +78,7 @@ class ViewBitPlane extends Operation {
 
         });
 
-        const imageBuffer = await parsedImage.getBufferAsync(jimp.AUTO);
+        const imageBuffer = await parsedImage.getBufferAsync(Jimp.AUTO);
 
         return new Uint8Array(imageBuffer).buffer;
     }

src/core/operations/XPathExpression.mjs

@@ -6,7 +6,7 @@
 
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import xmldom from "xmldom";
+import xmldom from "@xmldom/xmldom";
 import xpath from "xpath";
 
 /**
@@ -52,12 +52,6 @@ class XPathExpression extends Operation {
         try {
             doc = new xmldom.DOMParser({
                 errorHandler: {
-                    warning(w) {
-                        throw w;
-                    },
-                    error(e) {
-                        throw e;
-                    },
                     fatalError(e) {
                         throw e;
                     }

src/core/operations/XSalsa20.mjs

@@ -0,0 +1,156 @@
+/**
+ * @author joostrijneveld [joost@joostrijneveld.nl]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { salsa20Block, hsalsa20 } from "../lib/Salsa20.mjs";
+
+/**
+ * XSalsa20 operation
+ */
+class XSalsa20 extends Operation {
+
+    /**
+     * XSalsa20 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "XSalsa20";
+        this.module = "Ciphers";
+        this.description = "XSalsa20 is a variant of the Salsa20 stream cipher designed by Daniel J. Bernstein; XSalsa uses longer nonces.<br><br><b>Key:</b> XSalsa20 uses a key of 16 or 32 bytes (128 or 256 bits).<br><br><b>Nonce:</b> XSalsa20 uses a nonce of 24 bytes (192 bits).<br><br><b>Counter:</b> XSalsa uses a counter of 8 bytes (64 bits). The counter starts at zero at the start of the keystream, and is incremented at every 64 bytes.";
+        this.infoURL = "https://en.wikipedia.org/wiki/Salsa20#XSalsa20_with_192-bit_nonce";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Nonce",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64", "Integer"]
+            },
+            {
+                "name": "Counter",
+                "type": "number",
+                "value": 0,
+                "min": 0
+            },
+            {
+                "name": "Rounds",
+                "type": "option",
+                "value": ["20", "12", "8"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            nonceType = args[1].option,
+            rounds = parseInt(args[3], 10),
+            inputType = args[4],
+            outputType = args[5];
+
+        if (key.length !== 16 && key.length !== 32) {
+            throw new OperationError(`Invalid key length: ${key.length} bytes.
+
+XSalsa20 uses a key of 16 or 32 bytes (128 or 256 bits).`);
+        }
+
+        let counter, nonce;
+        if (nonceType === "Integer") {
+            nonce = Utils.intToByteArray(parseInt(args[1].string, 10), 8, "little");
+        } else {
+            nonce = Utils.convertToByteArray(args[1].string, args[1].option);
+            if (!(nonce.length === 24)) {
+                throw new OperationError(`Invalid nonce length: ${nonce.length} bytes.
+
+XSalsa20 uses a nonce of 24 bytes (192 bits).`);
+            }
+        }
+        counter = Utils.intToByteArray(args[2], 8, "little");
+
+        const xsalsaKey = hsalsa20(key, nonce.slice(0, 16), rounds);
+
+        const output = [];
+        input = Utils.convertToByteArray(input, inputType);
+
+        let counterAsInt = Utils.byteArrayToInt(counter, "little");
+        for (let i = 0; i < input.length; i += 64) {
+            counter = Utils.intToByteArray(counterAsInt, 8, "little");
+            const stream = salsa20Block(xsalsaKey, nonce.slice(16, 24), counter, rounds);
+            for (let j = 0; j < 64 && i + j < input.length; j++) {
+                output.push(input[i + j] ^ stream[j]);
+            }
+            counterAsInt++;
+        }
+
+        if (outputType === "Hex") {
+            return toHex(output);
+        } else {
+            return Utils.arrayBufferToStr(Uint8Array.from(output).buffer);
+        }
+    }
+
+    /**
+     * Highlight XSalsa20
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlight(pos, args) {
+        const inputType = args[4],
+            outputType = args[5];
+        if (inputType === "Raw" && outputType === "Raw") {
+            return pos;
+        }
+    }
+
+    /**
+     * Highlight XSalsa20 in reverse
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlightReverse(pos, args) {
+        const inputType = args[4],
+            outputType = args[5];
+        if (inputType === "Raw" && outputType === "Raw") {
+            return pos;
+        }
+    }
+
+}
+
+export default XSalsa20;

src/core/operations/XXTEADecrypt.mjs

@@ -0,0 +1,57 @@
+/**
+ * @author devcydo [devcydo@gmail.com]
+ * @author Ma Bingyao [mabingyao@gmail.com]
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import {decrypt} from "../lib/XXTEA.mjs";
+
+/**
+ * XXTEA Decrypt operation
+ */
+class XXTEADecrypt extends Operation {
+
+    /**
+     * XXTEADecrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "XXTEA Decrypt";
+        this.module = "Ciphers";
+        this.description = "Corrected Block TEA (often referred to as XXTEA) is a block cipher designed to correct weaknesses in the original Block TEA. XXTEA operates on variable-length blocks that are some arbitrary multiple of 32 bits in size (minimum 64 bits). The number of full cycles depends on the block size, but there are at least six (rising to 32 for small block sizes). The original Block TEA applies the XTEA round function to each word in the block and combines it additively with its leftmost neighbour. Slow diffusion rate of the decryption process was immediately exploited to break the cipher. Corrected Block TEA uses a more involved round function which makes use of both immediate neighbours in processing each word in the block.";
+        this.infoURL = "https://wikipedia.org/wiki/XXTEA";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "ArrayBuffer";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = new Uint8Array(Utils.convertToByteArray(args[0].string, args[0].option));
+        try {
+            return decrypt(new Uint8Array(input), key).buffer;
+        } catch (err) {
+            throw new OperationError("Unable to decrypt using this key");
+        }
+    }
+
+}
+
+export default XXTEADecrypt;

src/core/operations/XXTEAEncrypt.mjs

@@ -0,0 +1,52 @@
+/**
+ * @author devcydo [devcydo@gmail.com]
+ * @author Ma Bingyao [mabingyao@gmail.com]
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2024
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import {encrypt} from "../lib/XXTEA.mjs";
+
+/**
+ * XXTEA Encrypt operation
+ */
+class XXTEAEncrypt extends Operation {
+
+    /**
+     * XXTEAEncrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "XXTEA Encrypt";
+        this.module = "Ciphers";
+        this.description = "Corrected Block TEA (often referred to as XXTEA) is a block cipher designed to correct weaknesses in the original Block TEA. XXTEA operates on variable-length blocks that are some arbitrary multiple of 32 bits in size (minimum 64 bits). The number of full cycles depends on the block size, but there are at least six (rising to 32 for small block sizes). The original Block TEA applies the XTEA round function to each word in the block and combines it additively with its leftmost neighbour. Slow diffusion rate of the decryption process was immediately exploited to break the cipher. Corrected Block TEA uses a more involved round function which makes use of both immediate neighbours in processing each word in the block.";
+        this.infoURL = "https://wikipedia.org/wiki/XXTEA";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "ArrayBuffer";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = new Uint8Array(Utils.convertToByteArray(args[0].string, args[0].option));
+        return encrypt(new Uint8Array(input), key).buffer;
+    }
+
+}
+
+export default XXTEAEncrypt;