1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
Version 2.1 Copyright (C) Jerrad Pierce, Paul Johnston 1999 - 2002.
Distributed under the BSD License
Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
See http://pajhome.org.uk/crypt/md5 for more info.
*/
/**
A JavaScript implementation of the RSA Data Security, Inc. MD4 Message
Digest Algorithm, as defined in RFC 1320.
*/
var util = require('./util');
var struct = require('./struct');
/*** hash
returns a hexadecimal string of the md4 hash for a given byte string
*/
exports.hash = function (s, _characterSize) {
if (util.no(_characterSize))
_characterSize = struct.characterSize;
return struct.binl2bin(core_md4(struct.str2binl(s), s.length * _characterSize));
};
/*
Calculate the MD4 of an array of little-endian words, and a bit length
*/
var core_md4 = function (x, len) {
/* append padding */
x[len >> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;
for(var i = 0; i < x.length; i += 16) {
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;
a = md4_ff(a, b, c, d, x[i+ 0], 3 );
d = md4_ff(d, a, b, c, x[i+ 1], 7 );
c = md4_ff(c, d, a, b, x[i+ 2], 11);
b = md4_ff(b, c, d, a, x[i+ 3], 19);
a = md4_ff(a, b, c, d, x[i+ 4], 3 );
d = md4_ff(d, a, b, c, x[i+ 5], 7 );
c = md4_ff(c, d, a, b, x[i+ 6], 11);
b = md4_ff(b, c, d, a, x[i+ 7], 19);
a = md4_ff(a, b, c, d, x[i+ 8], 3 );
d = md4_ff(d, a, b, c, x[i+ 9], 7 );
c = md4_ff(c, d, a, b, x[i+10], 11);
b = md4_ff(b, c, d, a, x[i+11], 19);
a = md4_ff(a, b, c, d, x[i+12], 3 );
d = md4_ff(d, a, b, c, x[i+13], 7 );
c = md4_ff(c, d, a, b, x[i+14], 11);
b = md4_ff(b, c, d, a, x[i+15], 19);
a = md4_gg(a, b, c, d, x[i+ 0], 3 );
d = md4_gg(d, a, b, c, x[i+ 4], 5 );
c = md4_gg(c, d, a, b, x[i+ 8], 9 );
b = md4_gg(b, c, d, a, x[i+12], 13);
a = md4_gg(a, b, c, d, x[i+ 1], 3 );
d = md4_gg(d, a, b, c, x[i+ 5], 5 );
c = md4_gg(c, d, a, b, x[i+ 9], 9 );
b = md4_gg(b, c, d, a, x[i+13], 13);
a = md4_gg(a, b, c, d, x[i+ 2], 3 );
d = md4_gg(d, a, b, c, x[i+ 6], 5 );
c = md4_gg(c, d, a, b, x[i+10], 9 );
b = md4_gg(b, c, d, a, x[i+14], 13);
a = md4_gg(a, b, c, d, x[i+ 3], 3 );
d = md4_gg(d, a, b, c, x[i+ 7], 5 );
c = md4_gg(c, d, a, b, x[i+11], 9 );
b = md4_gg(b, c, d, a, x[i+15], 13);
a = md4_hh(a, b, c, d, x[i+ 0], 3 );
d = md4_hh(d, a, b, c, x[i+ 8], 9 );
c = md4_hh(c, d, a, b, x[i+ 4], 11);
b = md4_hh(b, c, d, a, x[i+12], 15);
a = md4_hh(a, b, c, d, x[i+ 2], 3 );
d = md4_hh(d, a, b, c, x[i+10], 9 );
c = md4_hh(c, d, a, b, x[i+ 6], 11);
b = md4_hh(b, c, d, a, x[i+14], 15);
a = md4_hh(a, b, c, d, x[i+ 1], 3 );
d = md4_hh(d, a, b, c, x[i+ 9], 9 );
c = md4_hh(c, d, a, b, x[i+ 5], 11);
b = md4_hh(b, c, d, a, x[i+13], 15);
a = md4_hh(a, b, c, d, x[i+ 3], 3 );
d = md4_hh(d, a, b, c, x[i+11], 9 );
c = md4_hh(c, d, a, b, x[i+ 7], 11);
b = md4_hh(b, c, d, a, x[i+15], 15);
a = struct.addU32(a, olda);
b = struct.addU32(b, oldb);
c = struct.addU32(c, oldc);
d = struct.addU32(d, oldd);
}
return [a, b, c, d];
};
/*
These functions implement the basic operation for each round of the
algorithm.
*/
var md4_cmn = function (q, a, b, x, s, t) {
return struct.addU32(struct.rolU32(struct.addU32(a, q, x, t), s), b);
};
var md4_ff = function (a, b, c, d, x, s) {
return md4_cmn((b & c) | ((~b) & d), a, 0, x, s, 0);
};
var md4_gg = function (a, b, c, d, x, s) {
return md4_cmn((b & c) | (b & d) | (c & d), a, 0, x, s, 1518500249);
};
var md4_hh = function (a, b, c, d, x, s) {
return md4_cmn(b ^ c ^ d, a, 0, x, s, 1859775393);
};
/*
Calculate the HMAC-MD4, of a key and some data
*/
var core_hmac_md4 = function (key, data, _characterSize) {
if (no(_characterSize))
_characterSize = struct.characterSize;
var bkey = struct.str2binl(key);
if(bkey.length > 16) bkey = core_md4(bkey, key.length * _characterSize);
var ipad = [], opad = [];
for(var i = 0; i < 16; i++) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = core_md4(ipad.concat(struct.str2binl(data)), 512 + data.length * _characterSize);
return core_md4(opad.concat(hash), 512 + 128);
};
|
