filer/lib/crypto-js/components/md5.js

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/*
CryptoJS v3.0.2
code.google.com/p/crypto-js
(c) 2009-2012 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
(function (Math) {
// Shortcuts
var C = CryptoJS;
var C_lib = C.lib;
var WordArray = C_lib.WordArray;
var Hasher = C_lib.Hasher;
var C_algo = C.algo;
// Constants table
var T = [];
// Compute constants
(function () {
for (var i = 0; i < 64; i++) {
T[i] = (Math.abs(Math.sin(i + 1)) * 0x100000000) | 0;
}
}());
/**
* MD5 hash algorithm.
*/
var MD5 = C_algo.MD5 = Hasher.extend({
_doReset: function () {
this._hash = WordArray.create([0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476]);
},
_doProcessBlock: function (M, offset) {
// Swap endian
for (var i = 0; i < 16; i++) {
// Shortcuts
var offset_i = offset + i;
var M_offset_i = M[offset_i];
// Swap
M[offset_i] = (
(((M_offset_i << 8) | (M_offset_i >>> 24)) & 0x00ff00ff) |
(((M_offset_i << 24) | (M_offset_i >>> 8)) & 0xff00ff00)
);
}
// Shortcut
var H = this._hash.words;
// Working variables
var a = H[0];
var b = H[1];
var c = H[2];
var d = H[3];
// Computation
for (var i = 0; i < 64; i += 4) {
if (i < 16) {
a = FF(a, b, c, d, M[offset + i], 7, T[i]);
d = FF(d, a, b, c, M[offset + i + 1], 12, T[i + 1]);
c = FF(c, d, a, b, M[offset + i + 2], 17, T[i + 2]);
b = FF(b, c, d, a, M[offset + i + 3], 22, T[i + 3]);
} else if (i < 32) {
a = GG(a, b, c, d, M[offset + ((i + 1) % 16)], 5, T[i]);
d = GG(d, a, b, c, M[offset + ((i + 6) % 16)], 9, T[i + 1]);
c = GG(c, d, a, b, M[offset + ((i + 11) % 16)], 14, T[i + 2]);
b = GG(b, c, d, a, M[offset + (i % 16)], 20, T[i + 3]);
} else if (i < 48) {
a = HH(a, b, c, d, M[offset + ((i * 3 + 5) % 16)], 4, T[i]);
d = HH(d, a, b, c, M[offset + ((i * 3 + 8) % 16)], 11, T[i + 1]);
c = HH(c, d, a, b, M[offset + ((i * 3 + 11) % 16)], 16, T[i + 2]);
b = HH(b, c, d, a, M[offset + ((i * 3 + 14) % 16)], 23, T[i + 3]);
} else /* if (i < 64) */ {
a = II(a, b, c, d, M[offset + ((i * 3) % 16)], 6, T[i]);
d = II(d, a, b, c, M[offset + ((i * 3 + 7) % 16)], 10, T[i + 1]);
c = II(c, d, a, b, M[offset + ((i * 3 + 14) % 16)], 15, T[i + 2]);
b = II(b, c, d, a, M[offset + ((i * 3 + 5) % 16)], 21, T[i + 3]);
}
}
// Intermediate hash value
H[0] = (H[0] + a) | 0;
H[1] = (H[1] + b) | 0;
H[2] = (H[2] + c) | 0;
H[3] = (H[3] + d) | 0;
},
_doFinalize: function () {
// Shortcuts
var data = this._data;
var dataWords = data.words;
var nBitsTotal = this._nDataBytes * 8;
var nBitsLeft = data.sigBytes * 8;
// Add padding
dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);
dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (
(((nBitsTotal << 8) | (nBitsTotal >>> 24)) & 0x00ff00ff) |
(((nBitsTotal << 24) | (nBitsTotal >>> 8)) & 0xff00ff00)
);
data.sigBytes = (dataWords.length + 1) * 4;
// Hash final blocks
this._process();
// Shortcut
var H = this._hash.words;
// Swap endian
for (var i = 0; i < 4; i++) {
// Shortcut
var H_i = H[i];
// Swap
H[i] = (((H_i << 8) | (H_i >>> 24)) & 0x00ff00ff) |
(((H_i << 24) | (H_i >>> 8)) & 0xff00ff00);
}
}
});
function FF(a, b, c, d, x, s, t) {
var n = a + ((b & c) | (~b & d)) + x + t;
return ((n << s) | (n >>> (32 - s))) + b;
}
function GG(a, b, c, d, x, s, t) {
var n = a + ((b & d) | (c & ~d)) + x + t;
return ((n << s) | (n >>> (32 - s))) + b;
}
function HH(a, b, c, d, x, s, t) {
var n = a + (b ^ c ^ d) + x + t;
return ((n << s) | (n >>> (32 - s))) + b;
}
function II(a, b, c, d, x, s, t) {
var n = a + (c ^ (b | ~d)) + x + t;
return ((n << s) | (n >>> (32 - s))) + b;
}
/**
* Shortcut function to the hasher's object interface.
*
* @param {WordArray|string} message The message to hash.
*
* @return {WordArray} The hash.
*
* @static
*
* @example
*
* var hash = CryptoJS.MD5('message');
* var hash = CryptoJS.MD5(wordArray);
*/
C.MD5 = Hasher._createHelper(MD5);
/**
* Shortcut function to the HMAC's object interface.
*
* @param {WordArray|string} message The message to hash.
* @param {WordArray|string} key The secret key.
*
* @return {WordArray} The HMAC.
*
* @static
*
* @example
*
* var hmac = CryptoJS.HmacMD5(message, key);
*/
C.HmacMD5 = Hasher._createHmacHelper(MD5);
}(Math));