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1712 jp_milcent 1
/*
2
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
3
 * Digest Algorithm, as defined in RFC 1321.
4
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
5
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
6
 * Distributed under the BSD License
7
 * See http://pajhome.org.uk/crypt/md5 for more info.
8
 */
9
 
10
/*
11
 * Configurable variables. You may need to tweak these to be compatible with
12
 * the server-side, but the defaults work in most cases.
13
 */
14
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
15
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
16
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */
17
 
18
/*
19
 * These are the functions you'll usually want to call
20
 * They take string arguments and return either hex or base-64 encoded strings
21
 */
22
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
23
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
24
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
25
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
26
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
27
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }
28
 
29
/*
30
 * Perform a simple self-test to see if the VM is working
31
 */
32
function md5_vm_test()
33
{
34
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
35
}
36
 
37
/*
38
 * Calculate the MD5 of an array of little-endian words, and a bit length
39
 */
40
function core_md5(x, len)
41
{
42
  /* append padding */
43
  x[len >> 5] |= 0x80 << ((len) % 32);
44
  x[(((len + 64) >>> 9) << 4) + 14] = len;
45
 
46
  var a =  1732584193;
47
  var b = -271733879;
48
  var c = -1732584194;
49
  var d =  271733878;
50
 
51
  for(var i = 0; i < x.length; i += 16)
52
  {
53
    var olda = a;
54
    var oldb = b;
55
    var oldc = c;
56
    var oldd = d;
57
 
58
    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
59
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
60
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
61
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
62
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
63
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
64
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
65
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
66
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
67
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
68
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
69
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
70
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
71
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
72
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
73
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
74
 
75
    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
76
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
77
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
78
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
79
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
80
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
81
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
82
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
83
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
84
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
85
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
86
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
87
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
88
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
89
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
90
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
91
 
92
    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
93
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
94
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
95
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
96
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
97
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
98
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
99
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
100
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
101
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
102
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
103
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
104
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
105
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
106
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
107
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
108
 
109
    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
110
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
111
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
112
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
113
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
114
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
115
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
116
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
117
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
118
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
119
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
120
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
121
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
122
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
123
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
124
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
125
 
126
    a = safe_add(a, olda);
127
    b = safe_add(b, oldb);
128
    c = safe_add(c, oldc);
129
    d = safe_add(d, oldd);
130
  }
131
  return Array(a, b, c, d);
132
 
133
}
134
 
135
/*
136
 * These functions implement the four basic operations the algorithm uses.
137
 */
138
function md5_cmn(q, a, b, x, s, t)
139
{
140
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
141
}
142
function md5_ff(a, b, c, d, x, s, t)
143
{
144
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
145
}
146
function md5_gg(a, b, c, d, x, s, t)
147
{
148
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
149
}
150
function md5_hh(a, b, c, d, x, s, t)
151
{
152
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
153
}
154
function md5_ii(a, b, c, d, x, s, t)
155
{
156
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
157
}
158
 
159
/*
160
 * Calculate the HMAC-MD5, of a key and some data
161
 */
162
function core_hmac_md5(key, data)
163
{
164
  var bkey = str2binl(key);
165
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);
166
 
167
  var ipad = Array(16), opad = Array(16);
168
  for(var i = 0; i < 16; i++)
169
  {
170
    ipad[i] = bkey[i] ^ 0x36363636;
171
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
172
  }
173
 
174
  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
175
  return core_md5(opad.concat(hash), 512 + 128);
176
}
177
 
178
/*
179
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
180
 * to work around bugs in some JS interpreters.
181
 */
182
function safe_add(x, y)
183
{
184
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
185
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
186
  return (msw << 16) | (lsw & 0xFFFF);
187
}
188
 
189
/*
190
 * Bitwise rotate a 32-bit number to the left.
191
 */
192
function bit_rol(num, cnt)
193
{
194
  return (num << cnt) | (num >>> (32 - cnt));
195
}
196
 
197
/*
198
 * Convert a string to an array of little-endian words
199
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
200
 */
201
function str2binl(str)
202
{
203
  var bin = Array();
204
  var mask = (1 << chrsz) - 1;
205
  for(var i = 0; i < str.length * chrsz; i += chrsz)
206
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
207
  return bin;
208
}
209
 
210
/*
211
 * Convert an array of little-endian words to a string
212
 */
213
function binl2str(bin)
214
{
215
  var str = "";
216
  var mask = (1 << chrsz) - 1;
217
  for(var i = 0; i < bin.length * 32; i += chrsz)
218
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
219
  return str;
220
}
221
 
222
/*
223
 * Convert an array of little-endian words to a hex string.
224
 */
225
function binl2hex(binarray)
226
{
227
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
228
  var str = "";
229
  for(var i = 0; i < binarray.length * 4; i++)
230
  {
231
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
232
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
233
  }
234
  return str;
235
}
236
 
237
/*
238
 * Convert an array of little-endian words to a base-64 string
239
 */
240
function binl2b64(binarray)
241
{
242
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
243
  var str = "";
244
  for(var i = 0; i < binarray.length * 4; i += 3)
245
  {
246
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
247
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
248
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
249
    for(var j = 0; j < 4; j++)
250
    {
251
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
252
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
253
    }
254
  }
255
  return str;
256
}