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
|
/*
* MD5
* (C) 1999-2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/md5.h>
#include <botan/loadstor.h>
#include <botan/rotate.h>
namespace Botan {
namespace {
/*
* MD5 FF Function
*/
inline void FF(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg,
byte S, u32bit magic)
{
A += (D ^ (B & (C ^ D))) + msg + magic;
A = rotate_left(A, S) + B;
}
/*
* MD5 GG Function
*/
inline void GG(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg,
byte S, u32bit magic)
{
A += (C ^ (D & (B ^ C))) + msg + magic;
A = rotate_left(A, S) + B;
}
/*
* MD5 HH Function
*/
inline void HH(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg,
byte S, u32bit magic)
{
A += (B ^ C ^ D) + msg + magic;
A = rotate_left(A, S) + B;
}
/*
* MD5 II Function
*/
inline void II(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg,
byte S, u32bit magic)
{
A += (C ^ (B | ~D)) + msg + magic;
A = rotate_left(A, S) + B;
}
}
/*
* MD5 Compression Function
*/
void MD5::compress_n(const byte input[], size_t blocks)
{
u32bit A = digest[0], B = digest[1], C = digest[2], D = digest[3];
for(size_t i = 0; i != blocks; ++i)
{
load_le(&M[0], input, M.size());
FF(A,B,C,D,M[ 0], 7,0xD76AA478); FF(D,A,B,C,M[ 1],12,0xE8C7B756);
FF(C,D,A,B,M[ 2],17,0x242070DB); FF(B,C,D,A,M[ 3],22,0xC1BDCEEE);
FF(A,B,C,D,M[ 4], 7,0xF57C0FAF); FF(D,A,B,C,M[ 5],12,0x4787C62A);
FF(C,D,A,B,M[ 6],17,0xA8304613); FF(B,C,D,A,M[ 7],22,0xFD469501);
FF(A,B,C,D,M[ 8], 7,0x698098D8); FF(D,A,B,C,M[ 9],12,0x8B44F7AF);
FF(C,D,A,B,M[10],17,0xFFFF5BB1); FF(B,C,D,A,M[11],22,0x895CD7BE);
FF(A,B,C,D,M[12], 7,0x6B901122); FF(D,A,B,C,M[13],12,0xFD987193);
FF(C,D,A,B,M[14],17,0xA679438E); FF(B,C,D,A,M[15],22,0x49B40821);
GG(A,B,C,D,M[ 1], 5,0xF61E2562); GG(D,A,B,C,M[ 6], 9,0xC040B340);
GG(C,D,A,B,M[11],14,0x265E5A51); GG(B,C,D,A,M[ 0],20,0xE9B6C7AA);
GG(A,B,C,D,M[ 5], 5,0xD62F105D); GG(D,A,B,C,M[10], 9,0x02441453);
GG(C,D,A,B,M[15],14,0xD8A1E681); GG(B,C,D,A,M[ 4],20,0xE7D3FBC8);
GG(A,B,C,D,M[ 9], 5,0x21E1CDE6); GG(D,A,B,C,M[14], 9,0xC33707D6);
GG(C,D,A,B,M[ 3],14,0xF4D50D87); GG(B,C,D,A,M[ 8],20,0x455A14ED);
GG(A,B,C,D,M[13], 5,0xA9E3E905); GG(D,A,B,C,M[ 2], 9,0xFCEFA3F8);
GG(C,D,A,B,M[ 7],14,0x676F02D9); GG(B,C,D,A,M[12],20,0x8D2A4C8A);
HH(A,B,C,D,M[ 5], 4,0xFFFA3942); HH(D,A,B,C,M[ 8],11,0x8771F681);
HH(C,D,A,B,M[11],16,0x6D9D6122); HH(B,C,D,A,M[14],23,0xFDE5380C);
HH(A,B,C,D,M[ 1], 4,0xA4BEEA44); HH(D,A,B,C,M[ 4],11,0x4BDECFA9);
HH(C,D,A,B,M[ 7],16,0xF6BB4B60); HH(B,C,D,A,M[10],23,0xBEBFBC70);
HH(A,B,C,D,M[13], 4,0x289B7EC6); HH(D,A,B,C,M[ 0],11,0xEAA127FA);
HH(C,D,A,B,M[ 3],16,0xD4EF3085); HH(B,C,D,A,M[ 6],23,0x04881D05);
HH(A,B,C,D,M[ 9], 4,0xD9D4D039); HH(D,A,B,C,M[12],11,0xE6DB99E5);
HH(C,D,A,B,M[15],16,0x1FA27CF8); HH(B,C,D,A,M[ 2],23,0xC4AC5665);
II(A,B,C,D,M[ 0], 6,0xF4292244); II(D,A,B,C,M[ 7],10,0x432AFF97);
II(C,D,A,B,M[14],15,0xAB9423A7); II(B,C,D,A,M[ 5],21,0xFC93A039);
II(A,B,C,D,M[12], 6,0x655B59C3); II(D,A,B,C,M[ 3],10,0x8F0CCC92);
II(C,D,A,B,M[10],15,0xFFEFF47D); II(B,C,D,A,M[ 1],21,0x85845DD1);
II(A,B,C,D,M[ 8], 6,0x6FA87E4F); II(D,A,B,C,M[15],10,0xFE2CE6E0);
II(C,D,A,B,M[ 6],15,0xA3014314); II(B,C,D,A,M[13],21,0x4E0811A1);
II(A,B,C,D,M[ 4], 6,0xF7537E82); II(D,A,B,C,M[11],10,0xBD3AF235);
II(C,D,A,B,M[ 2],15,0x2AD7D2BB); II(B,C,D,A,M[ 9],21,0xEB86D391);
A = (digest[0] += A);
B = (digest[1] += B);
C = (digest[2] += C);
D = (digest[3] += D);
input += HASH_BLOCK_SIZE;
}
}
/*
* Copy out the digest
*/
void MD5::copy_out(byte output[])
{
for(size_t i = 0; i != OUTPUT_LENGTH; i += 4)
store_le(digest[i/4], output + i);
}
/*
* Clear memory of sensitive data
*/
void MD5::clear()
{
MDx_HashFunction::clear();
zeroise(M);
digest[0] = 0x67452301;
digest[1] = 0xEFCDAB89;
digest[2] = 0x98BADCFE;
digest[3] = 0x10325476;
}
}
|
