/*//////////////////////////////////////////////////////////////////////////
* THIS PROGRAM IS A DERIVATIVE OF AN EXISTING WORK :: 27 August 2010
* See: http://www.myersdaily.org/joseph/javascript/md5-text.html
*
* Significant but mostly superficial changes have been made to the structure of the
* source so that it conforms to the Joose v3 object system for JavaScript
* See: http://joose.it/
/*//////////////////////////////////////////////////////////////////////////
Class('Hash.MD5', {
/*VERSION*/VERSION : 0.01,
my : {
has : {
which32 : {
is : 'rw',
init : 0
},
hex_chr : {
is : 'ro',
init : '0123456789abcdef'.split('')
}
},
methods : {
md5cycle : function (x, k) {
var a = x[0],
b = x[1],
c = x[2],
d = x[3]
a = this.ff(a, b, c, d, k[0], 7, -680876936)
d = this.ff(d, a, b, c, k[1], 12, -389564586)
c = this.ff(c, d, a, b, k[2], 17, 606105819)
b = this.ff(b, c, d, a, k[3], 22, -1044525330)
a = this.ff(a, b, c, d, k[4], 7, -176418897)
d = this.ff(d, a, b, c, k[5], 12, 1200080426)
c = this.ff(c, d, a, b, k[6], 17, -1473231341)
b = this.ff(b, c, d, a, k[7], 22, -45705983)
a = this.ff(a, b, c, d, k[8], 7, 1770035416)
d = this.ff(d, a, b, c, k[9], 12, -1958414417)
c = this.ff(c, d, a, b, k[10], 17, -42063)
b = this.ff(b, c, d, a, k[11], 22, -1990404162)
a = this.ff(a, b, c, d, k[12], 7, 1804603682)
d = this.ff(d, a, b, c, k[13], 12, -40341101)
c = this.ff(c, d, a, b, k[14], 17, -1502002290)
b = this.ff(b, c, d, a, k[15], 22, 1236535329)
a = this.gg(a, b, c, d, k[1], 5, -165796510)
d = this.gg(d, a, b, c, k[6], 9, -1069501632)
c = this.gg(c, d, a, b, k[11], 14, 643717713)
b = this.gg(b, c, d, a, k[0], 20, -373897302)
a = this.gg(a, b, c, d, k[5], 5, -701558691)
d = this.gg(d, a, b, c, k[10], 9, 38016083)
c = this.gg(c, d, a, b, k[15], 14, -660478335)
b = this.gg(b, c, d, a, k[4], 20, -405537848)
a = this.gg(a, b, c, d, k[9], 5, 568446438)
d = this.gg(d, a, b, c, k[14], 9, -1019803690)
c = this.gg(c, d, a, b, k[3], 14, -187363961)
b = this.gg(b, c, d, a, k[8], 20, 1163531501)
a = this.gg(a, b, c, d, k[13], 5, -1444681467)
d = this.gg(d, a, b, c, k[2], 9, -51403784)
c = this.gg(c, d, a, b, k[7], 14, 1735328473)
b = this.gg(b, c, d, a, k[12], 20, -1926607734)
a = this.hh(a, b, c, d, k[5], 4, -378558)
d = this.hh(d, a, b, c, k[8], 11, -2022574463)
c = this.hh(c, d, a, b, k[11], 16, 1839030562)
b = this.hh(b, c, d, a, k[14], 23, -35309556)
a = this.hh(a, b, c, d, k[1], 4, -1530992060)
d = this.hh(d, a, b, c, k[4], 11, 1272893353)
c = this.hh(c, d, a, b, k[7], 16, -155497632)
b = this.hh(b, c, d, a, k[10], 23, -1094730640)
a = this.hh(a, b, c, d, k[13], 4, 681279174)
d = this.hh(d, a, b, c, k[0], 11, -358537222)
c = this.hh(c, d, a, b, k[3], 16, -722521979)
b = this.hh(b, c, d, a, k[6], 23, 76029189)
a = this.hh(a, b, c, d, k[9], 4, -640364487)
d = this.hh(d, a, b, c, k[12], 11, -421815835)
c = this.hh(c, d, a, b, k[15], 16, 530742520)
b = this.hh(b, c, d, a, k[2], 23, -995338651)
a = this.ii(a, b, c, d, k[0], 6, -198630844)
d = this.ii(d, a, b, c, k[7], 10, 1126891415)
c = this.ii(c, d, a, b, k[14], 15, -1416354905)
b = this.ii(b, c, d, a, k[5], 21, -57434055)
a = this.ii(a, b, c, d, k[12], 6, 1700485571)
d = this.ii(d, a, b, c, k[3], 10, -1894986606)
c = this.ii(c, d, a, b, k[10], 15, -1051523)
b = this.ii(b, c, d, a, k[1], 21, -2054922799)
a = this.ii(a, b, c, d, k[8], 6, 1873313359)
d = this.ii(d, a, b, c, k[15], 10, -30611744)
c = this.ii(c, d, a, b, k[6], 15, -1560198380)
b = this.ii(b, c, d, a, k[13], 21, 1309151649)
a = this.ii(a, b, c, d, k[4], 6, -145523070)
d = this.ii(d, a, b, c, k[11], 10, -1120210379)
c = this.ii(c, d, a, b, k[2], 15, 718787259)
b = this.ii(b, c, d, a, k[9], 21, -343485551)
x[0] = this.add32(a, x[0])
x[1] = this.add32(b, x[1])
x[2] = this.add32(c, x[2])
x[3] = this.add32(d, x[3])
},
cmn: function (q, a, b, x, s, t) {
a = this.add32(this.add32(a, q), this.add32(x, t))
return this.add32((a << s) | (a >>> (32 - s)), b)
},
ff : function (a, b, c, d, x, s, t) {
return this.cmn((b & c) | ((~b) & d), a, b, x, s, t)
},
gg : function (a, b, c, d, x, s, t) {
return this.cmn((b & d) | (c & (~d)), a, b, x, s, t)
},
hh : function (a, b, c, d, x, s, t) {
return this.cmn(b ^ c ^ d, a, b, x, s, t)
},
ii : function (a, b, c, d, x, s, t) {
return this.cmn(c ^ (b | (~d)), a, b, x, s, t)
},
md51 : function (s) {
var n = s.length,
state = [1732584193, -271733879, -1732584194, 271733878],
i
for (i = 64 ; i <= s.length ; i += 64) {
this.md5cycle(state, this.md5blk(s.substring(i - 64, i)))
}
s = s.substring(i - 64)
var tail = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0]
for (i = 0 ; i < s.length ; i++) {
tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3)
}
tail[i >> 2] |= 0x80 << ((i % 4) << 3)
if (i > 55) {
this.md5cycle(state, tail)
for (i = 0 ; i < 16 ; i++) tail[i] = 0
}
tail[14] = n * 8
this.md5cycle(state, tail)
return state
},
md5blk : function (s) { // I figured global was faster.
var md5blks = [], // Andy King said do it this way.
i
for (i = 0 ; i < 64 ; i += 4) {
md5blks[i >> 2] = s.charCodeAt(i)
+ (s.charCodeAt(i + 1) << 8)
+ (s.charCodeAt(i + 2) << 16)
+ (s.charCodeAt(i + 3) << 24)
}
return md5blks
},
rhex : function (n) {
var s = '',
j
for (j = 0 ; j < 4 ; j++) {
s += this.getHex_chr()[(n >> (j * 8 + 4)) & 0x0F]
+ this.getHex_chr()[(n >> (j * 8)) & 0x0F]
}
return s
},
hex : function (x) {
for (var i = 0 ; i < x.length ; i++) {
x[i] = this.rhex(x[i])
}
return x.join('')
},
add32 : function (a, b) {
switch(this.getWhich32()) {
case 0:
return (a + b) & 0xFFFFFFFF
case 1:
var lsw = (a & 0xFFFF) + (b & 0xFFFF),
msw = (a >> 16) + (b >> 16) + (lsw >> 16)
return (msw << 16) | (lsw & 0xFFFF)
default:
return (a + b) & 0xFFFFFFFF
}
},
hash : function (s) {
return this.hex(this.md51(s))
},
initialize : function () {
if (this.hash('hello') != '5d41402abc4b2a76b9719d911017c592') {
this.setWhich32(1)
}
}
}
}
})