From 4a6d87390e93820863c43f1689fe2578cd52ef26 Mon Sep 17 00:00:00 2001
From: Macide Celik <macide.35cc@gmail.com>
Date: Tue, 29 Oct 2019 13:15:34 +0300
Subject: [PATCH] Delete ExtractLSB.mjs

---
 src/core/operations/ExtractLSB.mjs | 114 -----------------------------
 1 file changed, 114 deletions(-)
 delete mode 100644 src/core/operations/ExtractLSB.mjs

diff --git a/src/core/operations/ExtractLSB.mjs b/src/core/operations/ExtractLSB.mjs
deleted file mode 100644
index 12f990da..00000000
--- a/src/core/operations/ExtractLSB.mjs
+++ /dev/null
@@ -1,114 +0,0 @@
-/**
- * @author Ge0rg3 [georgeomnet+cyberchef@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 { fromBinary } from "../lib/Binary.mjs";
-import { isImage } from "../lib/FileType.mjs";
-import jimp from "jimp";
-
-/**
- * Extract LSB operation
- */
-class ExtractLSB extends Operation {
-
-    /**
-     * ExtractLSB constructor
-     */
-    constructor() {
-        super();
-
-        this.name = "Extract LSB";
-        this.module = "Image";
-        this.description = "Extracts the Least Significant Bit data from each pixel in an image. This is a common way to hide data in Steganography.";
-        this.infoURL = "https://wikipedia.org/wiki/Bit_numbering#Least_significant_bit_in_digital_steganography";
-        this.inputType = "ArrayBuffer";
-        this.outputType = "byteArray";
-        this.args = [
-            {
-                name: "Colour Pattern #1",
-                type: "option",
-                value: COLOUR_OPTIONS,
-            },
-            {
-                name: "Colour Pattern #2",
-                type: "option",
-                value: ["", ...COLOUR_OPTIONS],
-            },
-            {
-                name: "Colour Pattern #3",
-                type: "option",
-                value: ["", ...COLOUR_OPTIONS],
-            },
-            {
-                name: "Colour Pattern #4",
-                type: "option",
-                value: ["", ...COLOUR_OPTIONS],
-            },
-            {
-                name: "Pixel Order",
-                type: "option",
-                value: ["Row", "Column"],
-            },
-            {
-                name: "Bit",
-                type: "number",
-                value: 0
-            }
-        ];
-    }
-
-    /**
-     * @param {ArrayBuffer} input
-     * @param {Object[]} args
-     * @returns {byteArray}
-     */
-    async run(input, args) {
-        if (!isImage(input)) throw new OperationError("Please enter a valid image file.");
-
-        const bit = 7 - args.pop(),
-            pixelOrder = args.pop(),
-            colours = args.filter(option => option !== "").map(option => COLOUR_OPTIONS.indexOf(option)),
-            parsedImage = await jimp.read(input),
-            width = parsedImage.bitmap.width,
-            height = parsedImage.bitmap.height,
-            rgba = parsedImage.bitmap.data;
-
-        if (bit < 0 || bit > 7) {
-            throw new OperationError("Error: Bit argument must be between 0 and 7");
-        }
-
-        let i, combinedBinary = "";
-
-        if (pixelOrder === "Row") {
-            for (i = 0; i < rgba.length; i += 4) {
-                for (const colour of colours) {
-                    combinedBinary += Utils.bin(rgba[i + colour])[bit];
-                }
-            }
-        } else {
-            let rowWidth;
-            const pixelWidth = width * 4;
-            for (let col = 0; col < width; col++) {
-                for (let row = 0; row < height; row++) {
-                    rowWidth = row * pixelWidth;
-                    for (const colour of colours) {
-                        i = rowWidth + (col + colour * 4);
-                        combinedBinary += Utils.bin(rgba[i])[bit];
-                    }
-                }
-            }
-        }
-
-        return fromBinary(combinedBinary);
-    }
-
-}
-
-const COLOUR_OPTIONS = ["R", "G", "B", "A"];
-
-export default ExtractLSB;