initital commit

2021-09-15 09:58:01 +08:00
commit d46f96d263
90 changed files with 17509 additions and 0 deletions
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+(function(){
+
+var C = (typeof window === 'undefined') ? require('./Crypto').Crypto : window.Crypto;
+
+// Shortcuts
+var util = C.util,
+    charenc = C.charenc,
+    UTF8 = charenc.UTF8,
+    Binary = charenc.Binary;
+
+C.PBKDF2 = function (password, salt, keylen, options) {
+
+	// Convert to byte arrays
+	if (password.constructor == String) password = UTF8.stringToBytes(password);
+	if (salt.constructor == String) salt = UTF8.stringToBytes(salt);
+	/* else, assume byte arrays already */
+
+	// Defaults
+	var hasher = options && options.hasher || C.SHA1,
+	    iterations = options && options.iterations || 1;
+
+	// Pseudo-random function
+	function PRF(password, salt) {
+		return C.HMAC(hasher, salt, password, { asBytes: true });
+	}
+
+	// Generate key
+	var derivedKeyBytes = [],
+	    blockindex = 1;
+	while (derivedKeyBytes.length < keylen) {
+		var block = PRF(password, salt.concat(util.wordsToBytes([blockindex])));
+		for (var u = block, i = 1; i < iterations; i++) {
+			u = PRF(password, u);
+			for (var j = 0; j < block.length; j++) block[j] ^= u[j];
+		}
+		derivedKeyBytes = derivedKeyBytes.concat(block);
+		blockindex++;
+	}
+
+	// Truncate excess bytes
+	derivedKeyBytes.length = keylen;
+
+	return options && options.asBytes ? derivedKeyBytes :
+	       options && options.asString ? Binary.bytesToString(derivedKeyBytes) :
+	       util.bytesToHex(derivedKeyBytes);
+
+};
+
+})();