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660 lines
20 KiB
HTML
Executable file
660 lines
20 KiB
HTML
Executable file
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<h1 class="page-title">Source: operations/Cipher.js</h1>
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<section>
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<article>
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<pre
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class="sunlight-highlight-javascript linenums">/* globals CryptoJS, blowfish */
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/**
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* Cipher operations.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*
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* @namespace
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*/
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var Cipher = {
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/**
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* @constant
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* @default
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*/
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IO_FORMAT1: ["Hex", "Base64", "UTF8", "UTF16", "UTF16LE", "UTF16BE", "Latin1"],
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/**
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* @constant
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* @default
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*/
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IO_FORMAT2: ["UTF8", "UTF16", "UTF16LE", "UTF16BE", "Latin1", "Hex", "Base64"],
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/**
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* @constant
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* @default
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*/
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IO_FORMAT3: ["Hex", "Base64", "UTF16", "UTF16LE", "UTF16BE", "Latin1"],
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/**
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* @constant
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* @default
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*/
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IO_FORMAT4: ["Latin1", "UTF8", "UTF16", "UTF16LE", "UTF16BE", "Hex", "Base64"],
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/**
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* @constant
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* @default
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*/
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MODES: ["CBC", "CFB", "CTR", "OFB", "ECB"],
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/**
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* @constant
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* @default
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*/
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PADDING: ["Pkcs7", "Iso97971", "AnsiX923", "Iso10126", "ZeroPadding", "NoPadding"],
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/**
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* @constant
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* @default
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*/
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RESULT_TYPE: ["Show all", "Ciphertext", "Key", "IV", "Salt"],
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/**
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* Runs encryption operations using the CryptoJS framework.
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*
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* @private
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* @param {function} algo - The CryptoJS algorithm to use
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* @param {byte_array} input
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* @param {function} args
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* @returns {string}
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*/
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_enc: function (algo, input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || ""),
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iv = Utils.format[args[1].option].parse(args[1].string || ""),
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salt = Utils.format[args[2].option].parse(args[2].string || ""),
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mode = CryptoJS.mode[args[3]],
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padding = CryptoJS.pad[args[4]],
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result_option = args[5].toLowerCase(),
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output_format = args[6];
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if (iv.sigBytes === 0) {
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// Use passphrase rather than key. Need to convert it to a string.
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key = key.toString(CryptoJS.enc.Latin1);
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}
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var encrypted = algo.encrypt(input, key, {
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salt: salt.sigBytes > 0 ? salt : false,
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iv: iv.sigBytes > 0 ? iv : null,
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mode: mode,
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padding: padding
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});
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var result = "";
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if (result_option == "show all") {
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result += "Key: " + encrypted.key.toString(Utils.format[output_format]);
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result += "\nIV: " + encrypted.iv.toString(Utils.format[output_format]);
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if (encrypted.salt) result += "\nSalt: " + encrypted.salt.toString(Utils.format[output_format]);
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result += "\n\nCiphertext: " + encrypted.ciphertext.toString(Utils.format[output_format]);
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} else {
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result = encrypted[result_option].toString(Utils.format[output_format]);
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}
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return result;
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},
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/**
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* Runs decryption operations using the CryptoJS framework.
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*
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* @private
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* @param {function} algo - The CryptoJS algorithm to use
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* @param {byte_array} input
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* @param {function} args
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* @returns {string}
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*/
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_dec: function (algo, input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || ""),
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iv = Utils.format[args[1].option].parse(args[1].string || ""),
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salt = Utils.format[args[2].option].parse(args[2].string || ""),
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mode = CryptoJS.mode[args[3]],
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padding = CryptoJS.pad[args[4]],
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input_format = args[5],
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output_format = args[6];
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// The ZeroPadding option causes a crash when the input length is 0
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if (!input.length) {
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return "No input";
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}
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var ciphertext = Utils.format[input_format].parse(input);
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if (iv.sigBytes === 0) {
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// Use passphrase rather than key. Need to convert it to a string.
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key = key.toString(CryptoJS.enc.Latin1);
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}
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var decrypted = algo.decrypt({
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ciphertext: ciphertext,
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salt: salt.sigBytes > 0 ? salt : false
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}, key, {
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iv: iv.sigBytes > 0 ? iv : null,
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mode: mode,
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padding: padding
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});
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var result;
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try {
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result = decrypted.toString(Utils.format[output_format]);
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} catch (err) {
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result = "Decrypt error: " + err.message;
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}
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return result;
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},
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/**
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* AES Encrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_aes_enc: function (input, args) {
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return Cipher._enc(CryptoJS.AES, input, args);
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},
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/**
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* AES Decrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_aes_dec: function (input, args) {
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return Cipher._dec(CryptoJS.AES, input, args);
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},
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/**
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* DES Encrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_des_enc: function (input, args) {
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return Cipher._enc(CryptoJS.DES, input, args);
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},
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/**
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* DES Decrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_des_dec: function (input, args) {
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return Cipher._dec(CryptoJS.DES, input, args);
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},
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/**
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* Triple DES Encrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_triple_des_enc: function (input, args) {
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return Cipher._enc(CryptoJS.TripleDES, input, args);
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},
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/**
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* Triple DES Decrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_triple_des_dec: function (input, args) {
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return Cipher._dec(CryptoJS.TripleDES, input, args);
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},
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/**
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* Rabbit Encrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_rabbit_enc: function (input, args) {
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return Cipher._enc(CryptoJS.Rabbit, input, args);
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},
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/**
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* Rabbit Decrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_rabbit_dec: function (input, args) {
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return Cipher._dec(CryptoJS.Rabbit, input, args);
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},
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/**
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* @constant
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* @default
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*/
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BLOWFISH_MODES: ["ECB", "CBC", "PCBC", "CFB", "OFB", "CTR"],
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/**
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* @constant
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* @default
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*/
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BLOWFISH_OUTPUT_TYPES: ["Base64", "Hex", "String", "Raw"],
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/**
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* Blowfish Encrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_blowfish_enc: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
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mode = args[1],
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output_format = args[2];
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if (key.length === 0) return "Enter a key";
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var enc_hex = blowfish.encrypt(input, key, {
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outputType: 1,
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cipherMode: Cipher.BLOWFISH_MODES.indexOf(mode)
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}),
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enc = CryptoJS.enc.Hex.parse(enc_hex);
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return enc.toString(Utils.format[output_format]);
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},
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/**
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* Blowfish Decrypt operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_blowfish_dec: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
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mode = args[1],
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input_format = args[2];
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if (key.length === 0) return "Enter a key";
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input = Utils.format[input_format].parse(input);
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return blowfish.decrypt(input.toString(CryptoJS.enc.Base64), key, {
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outputType: 0, // This actually means inputType. The library is weird.
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cipherMode: Cipher.BLOWFISH_MODES.indexOf(mode)
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});
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},
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/**
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* @constant
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* @default
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*/
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KDF_KEY_SIZE: 256,
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/**
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* @constant
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* @default
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*/
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KDF_ITERATIONS: 1,
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/**
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* Derive PBKDF2 key operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_pbkdf2: function (input, args) {
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var key_size = args[0] / 32,
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iterations = args[1],
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salt = CryptoJS.enc.Hex.parse(args[2] || ""),
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input_format = args[3],
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output_format = args[4],
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passphrase = Utils.format[input_format].parse(input),
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key = CryptoJS.PBKDF2(passphrase, salt, { keySize: key_size, iterations: iterations });
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return key.toString(Utils.format[output_format]);
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},
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/**
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* Derive EVP key operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_evpkdf: function (input, args) {
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var key_size = args[0] / 32,
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iterations = args[1],
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salt = CryptoJS.enc.Hex.parse(args[2] || ""),
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input_format = args[3],
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output_format = args[4],
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passphrase = Utils.format[input_format].parse(input),
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key = CryptoJS.EvpKDF(passphrase, salt, { keySize: key_size, iterations: iterations });
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return key.toString(Utils.format[output_format]);
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},
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/**
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* RC4 operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_rc4: function (input, args) {
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var message = Utils.format[args[1]].parse(input),
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passphrase = Utils.format[args[0].option].parse(args[0].string),
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encrypted = CryptoJS.RC4.encrypt(message, passphrase);
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return encrypted.ciphertext.toString(Utils.format[args[2]]);
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},
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/**
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* @constant
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* @default
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*/
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RC4DROP_BYTES: 768,
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/**
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* RC4 Drop operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_rc4drop: function (input, args) {
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var message = Utils.format[args[1]].parse(input),
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passphrase = Utils.format[args[0].option].parse(args[0].string),
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drop = args[3],
|
|
encrypted = CryptoJS.RC4Drop.encrypt(message, passphrase, { drop: drop });
|
|
|
|
return encrypted.ciphertext.toString(Utils.format[args[2]]);
|
|
},
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* Overwriting the CryptoJS OpenSSL key derivation function so that it is possible to not pass a
|
|
* salt in.
|
|
|
|
* @param {string} password - The password to derive from.
|
|
* @param {number} keySize - The size in words of the key to generate.
|
|
* @param {number} ivSize - The size in words of the IV to generate.
|
|
* @param {WordArray|string} salt (Optional) A 64-bit salt to use. If omitted, a salt will be
|
|
* generated randomly. If set to false, no salt will be added.
|
|
*
|
|
* @returns {CipherParams} A cipher params object with the key, IV, and salt.
|
|
*
|
|
* @static
|
|
*
|
|
* @example
|
|
* // Randomly generates a salt
|
|
* var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32);
|
|
* // Uses the salt 'saltsalt'
|
|
* var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32, 'saltsalt');
|
|
* // Does not use a salt
|
|
* var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32, false);
|
|
*/
|
|
CryptoJS.kdf.OpenSSL.execute = function (password, keySize, ivSize, salt) {
|
|
// Generate random salt if no salt specified and not set to false
|
|
// This line changed from `if (!salt) {` to the following
|
|
if (salt === undefined || salt === null) {
|
|
salt = CryptoJS.lib.WordArray.random(64/8);
|
|
}
|
|
|
|
// Derive key and IV
|
|
var key = CryptoJS.algo.EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);
|
|
|
|
// Separate key and IV
|
|
var iv = CryptoJS.lib.WordArray.create(key.words.slice(keySize), ivSize * 4);
|
|
key.sigBytes = keySize * 4;
|
|
|
|
// Return params
|
|
return CryptoJS.lib.CipherParams.create({ key: key, iv: iv, salt: salt });
|
|
};
|
|
</pre>
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|
</article>
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</section>
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