Merge branch 'artemisbot-feature_vigenere'

src/js/config/Categories.js

@@ -80,6 +80,8 @@ var Categories = [
             "ROT47",
             "XOR",
             "XOR Brute Force",
+            "Vigenère Encode",
+            "Vigenère Decode",
             "Derive PBKDF2 key",
             "Derive EVP key",
         ]

src/js/config/OperationConfig.js

@@ -1325,6 +1325,36 @@ var OperationConfig = {
             },
         ]
     },
+    "Vigenère Encode": {
+        description: "The Vigenere cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.",
+        run: Cipher.run_vigenere_enc,
+        highlight: true,
+        highlight_reverse: true,
+        input_type: "string",
+        output_type: "string",
+        args: [
+            {
+                name: "Key",
+                type: "string",
+                value: ""
+            }
+        ]
+    },
+    "Vigenère Decode": {
+        description: "The Vigenere cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.",
+        run: Cipher.run_vigenere_dec,
+        highlight: true,
+        highlight_reverse: true,
+        input_type: "string",
+        output_type: "string",
+        args: [
+            {
+                name: "Key",
+                type: "string",
+                value: ""
+            }
+        ]
+    },
     "Rotate right": {
         description: "Rotates each byte to the right by the number of bits specified. Currently only supports 8-bit values.",
         run: Rotate.run_rotr,

src/js/operations/Cipher.js

@@ -385,6 +385,96 @@ var Cipher = {
         return encrypted.ciphertext.toString(Utils.format[args[2]]);
     },
     
+
+    /**
+     * Vigenère Encode operation.
+     *
+     * @author Matt C [matt@artemisbot.pw]
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run_vigenere_enc: function (input, args) {
+        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+            key = args[0].toLowerCase(),
+            output = "",
+            fail = 0,
+            key_index,
+            msg_index,
+            chr;
+
+        if (!key) return "No key entered";
+        if (!/^[a-zA-Z]+$/.test(key)) return "The key must consist only of letters";
+
+        for (var i = 0; i < input.length; i++) {
+            if (alphabet.indexOf(input[i]) >= 0) {
+                // Get the corresponding character of key for the current letter, accounting
+                // for chars not in alphabet
+                chr = key[(i - fail) % key.length];
+                // Get the location in the vigenere square of the key char
+                key_index = alphabet.indexOf(chr);
+                // Get the location in the vigenere square of the message char
+                msg_index = alphabet.indexOf(input[i]);
+                // Get the encoded letter by finding the sum of indexes modulo 26 and finding
+                // the letter corresponding to that
+                output += alphabet[(key_index + msg_index) % 26];
+            } else if (alphabet.indexOf(input[i].toLowerCase()) >= 0) {
+                chr = key[(i - fail) % key.length].toLowerCase();
+                key_index = alphabet.indexOf(chr);
+                msg_index = alphabet.indexOf(input[i].toLowerCase());
+                output += alphabet[(key_index + msg_index) % 26].toUpperCase();
+            } else {
+                output += input[i];
+                fail++;
+            }
+        }
+
+        return output;
+    },
+
+
+    /**
+     * Vigenère Decode operation.
+     *
+     * @author Matt C [matt@artemisbot.pw]
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run_vigenere_dec: function (input, args) {
+        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+            key = args[0].toLowerCase(),
+            output = "",
+            fail = 0,
+            key_index,
+            msg_index,
+            chr;
+
+        if (!key) return "No key entered";
+        if (!/^[a-zA-Z]+$/.test(key)) return "The key must consist only of letters";
+
+        for (var i = 0; i < input.length; i++) {
+            if (alphabet.indexOf(input[i]) >= 0) {
+                chr = key[(i - fail) % key.length];
+                key_index = alphabet.indexOf(chr);
+                msg_index = alphabet.indexOf(input[i]);
+                // Subtract indexes from each other, add 26 just in case the value is negative,
+                // modulo to remove if neccessary
+                output += alphabet[(msg_index - key_index + alphabet.length ) % 26];
+            } else if (alphabet.indexOf(input[i].toLowerCase()) >= 0) {
+                chr = key[(i - fail) % key.length].toLowerCase();
+                key_index = alphabet.indexOf(chr);
+                msg_index = alphabet.indexOf(input[i].toLowerCase());
+                output += alphabet[(msg_index + alphabet.length - key_index) % 26].toUpperCase();
+            } else {
+                output += input[i];
+                fail++;
+            }
+        }
+
+        return output;
+    },
+
 };
 
 

src/static/stats.txt

@@ -1,9 +1,9 @@
-202	source files
-104281	lines
+203	source files
+104403	lines
 4.0M	size
 
 136	JavaScript source files
-95191	lines
+95313	lines
 3.5M	size
 
 78	third party JavaScript source files
@@ -11,11 +11,11 @@
 2.7M	size
 
 58	first party JavaScript source files
-18814	lines
+18936	lines
 728K	size
 
 3.2M	uncompressed JavaScript size
 1.7M	compressed JavaScript size
 
 15	categories
-153	operations
+155	operations