From 6c2ae74c0f1148eff8ed9735edbb6fcd9c7aa446 Mon Sep 17 00:00:00 2001
From: DC3-DCCI <DC3-DCCI>
Date: Thu, 3 Sep 2020 17:03:48 -0400
Subject: [PATCH] Added ToBase32FromBase16 feature

---
 CHANGELOG.md                               |  2 +
 src/core/config/Categories.json            |  1 +
 src/core/operations/ToBase32FromBase16.mjs | 53 ++++++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 src/core/operations/ToBase32FromBase16.mjs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08c2acdf..b09f1f9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 All major and minor version changes will be documented in this file. Details of patch-level version changes can be found in [commit messages](https://github.com/gchq/CyberChef/commits/master).
 
+### Unreleased
+- Add 'To Base32 (From Base16)' operation
 
 ### [9.21.0] - 2020-06-12
 - Node API now exports `magic` operation [@d98762625] | [#1049]
diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 77e3d319..012892eb 100755
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -22,6 +22,7 @@
             "From Base64",
             "Show Base64 offsets",
             "To Base32",
+	        "To Base32 (From Base16)",
             "From Base32",
             "To Base58",
             "From Base58",
diff --git a/src/core/operations/ToBase32FromBase16.mjs b/src/core/operations/ToBase32FromBase16.mjs
new file mode 100644
index 00000000..85109d3e
--- /dev/null
+++ b/src/core/operations/ToBase32FromBase16.mjs
@@ -0,0 +1,53 @@
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+
+/**
+ * To Base32 operation
+ */
+class ToBase32FromBase16 extends Operation {
+
+    /**
+     * ToBase32 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To Base32 (From Base16)";
+        this.module = "Default";
+        this.description = "Converts Base16 to Base32 using Base2 as an intermediate and 5 bits at a time.";
+        this.infoURL = "https://wikipedia.org/wiki/Base32";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "string";
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @returns {string}
+     */
+    run(input) {
+        if (!input) return "";
+        input = new Uint8Array(input);
+        const toStr = Utils.byteArrayToChars(input).toUpperCase();
+        const b16Regex = new RegExp("^[A-Fa-f0-9]+$");
+        if (b16Regex.test(toStr) === true) {
+            const b32Map = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+            let binary = "";
+            for (const c of toStr) {
+                const binRep = parseInt(c, 16).toString(2).padStart(4, "0");
+                binary += binRep;
+            }
+            let b32 = "";
+            for (let i = 0; i < binary.length; i+=5) {
+                const slice = binary.slice(i, i+5);
+                const toB32 = b32Map[parseInt(slice, 2)];
+                b32 += toB32;
+            }
+            return b32;
+        } else {
+            return "";
+        }
+    }
+
+}
+
+export default ToBase32FromBase16;