diff options
| author | friendica <info@friendica.com> | 2013-11-07 23:25:13 -0800 |
|---|---|---|
| committer | friendica <info@friendica.com> | 2013-11-07 23:25:13 -0800 |
| commit | 3a9cbcaf011f5c5d423e1cd99b43442669692129 (patch) | |
| tree | d160f11dd97871d94ffe6e6d10ea48ce57eed357 /library/cryptojs/components/evpkdf.js | |
| parent | 90ab0d963bf5074643c6f275dbb8595b6c51a03d (diff) | |
| download | volse-hubzilla-3a9cbcaf011f5c5d423e1cd99b43442669692129.tar.gz volse-hubzilla-3a9cbcaf011f5c5d423e1cd99b43442669692129.tar.bz2 volse-hubzilla-3a9cbcaf011f5c5d423e1cd99b43442669692129.zip | |
Wankers.
Diffstat (limited to 'library/cryptojs/components/evpkdf.js')
| -rw-r--r-- | library/cryptojs/components/evpkdf.js | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/library/cryptojs/components/evpkdf.js b/library/cryptojs/components/evpkdf.js new file mode 100644 index 000000000..98dea85cd --- /dev/null +++ b/library/cryptojs/components/evpkdf.js @@ -0,0 +1,118 @@ +/* +CryptoJS v3.1.2 +code.google.com/p/crypto-js +(c) 2009-2013 by Jeff Mott. All rights reserved. +code.google.com/p/crypto-js/wiki/License +*/ +(function () {
+ // Shortcuts
+ var C = CryptoJS;
+ var C_lib = C.lib;
+ var Base = C_lib.Base;
+ var WordArray = C_lib.WordArray;
+ var C_algo = C.algo;
+ var MD5 = C_algo.MD5;
+
+ /**
+ * This key derivation function is meant to conform with EVP_BytesToKey.
+ * www.openssl.org/docs/crypto/EVP_BytesToKey.html
+ */
+ var EvpKDF = C_algo.EvpKDF = Base.extend({
+ /**
+ * Configuration options.
+ *
+ * @property {number} keySize The key size in words to generate. Default: 4 (128 bits)
+ * @property {Hasher} hasher The hash algorithm to use. Default: MD5
+ * @property {number} iterations The number of iterations to perform. Default: 1
+ */
+ cfg: Base.extend({
+ keySize: 128/32,
+ hasher: MD5,
+ iterations: 1
+ }),
+
+ /**
+ * Initializes a newly created key derivation function.
+ *
+ * @param {Object} cfg (Optional) The configuration options to use for the derivation.
+ *
+ * @example
+ *
+ * var kdf = CryptoJS.algo.EvpKDF.create();
+ * var kdf = CryptoJS.algo.EvpKDF.create({ keySize: 8 });
+ * var kdf = CryptoJS.algo.EvpKDF.create({ keySize: 8, iterations: 1000 });
+ */
+ init: function (cfg) {
+ this.cfg = this.cfg.extend(cfg);
+ },
+
+ /**
+ * Derives a key from a password.
+ *
+ * @param {WordArray|string} password The password.
+ * @param {WordArray|string} salt A salt.
+ *
+ * @return {WordArray} The derived key.
+ *
+ * @example
+ *
+ * var key = kdf.compute(password, salt);
+ */
+ compute: function (password, salt) {
+ // Shortcut
+ var cfg = this.cfg;
+
+ // Init hasher
+ var hasher = cfg.hasher.create();
+
+ // Initial values
+ var derivedKey = WordArray.create();
+
+ // Shortcuts
+ var derivedKeyWords = derivedKey.words;
+ var keySize = cfg.keySize;
+ var iterations = cfg.iterations;
+
+ // Generate key
+ while (derivedKeyWords.length < keySize) {
+ if (block) {
+ hasher.update(block);
+ }
+ var block = hasher.update(password).finalize(salt);
+ hasher.reset();
+
+ // Iterations
+ for (var i = 1; i < iterations; i++) {
+ block = hasher.finalize(block);
+ hasher.reset();
+ }
+
+ derivedKey.concat(block);
+ }
+ derivedKey.sigBytes = keySize * 4;
+
+ return derivedKey;
+ }
+ });
+
+ /**
+ * Derives a key from a password.
+ *
+ * @param {WordArray|string} password The password.
+ * @param {WordArray|string} salt A salt.
+ * @param {Object} cfg (Optional) The configuration options to use for this computation.
+ *
+ * @return {WordArray} The derived key.
+ *
+ * @static
+ *
+ * @example
+ *
+ * var key = CryptoJS.EvpKDF(password, salt);
+ * var key = CryptoJS.EvpKDF(password, salt, { keySize: 8 });
+ * var key = CryptoJS.EvpKDF(password, salt, { keySize: 8, iterations: 1000 });
+ */
+ C.EvpKDF = function (password, salt, cfg) {
+ return EvpKDF.create(cfg).compute(password, salt);
+ };
+}());
|