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
|
/*
* MD4
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/md4.h>
namespace Botan {
std::unique_ptr<HashFunction> MD4::copy_state() const
{
return std::unique_ptr<HashFunction>(new MD4(*this));
}
namespace {
inline void FF4(uint32_t& A, uint32_t& B, uint32_t& C, uint32_t& D,
uint32_t M0, uint32_t M1, uint32_t M2, uint32_t M3)
{
A += (D ^ (B & (C ^ D))) + M0;
A = rotl<3>(A);
D += (C ^ (A & (B ^ C))) + M1;
D = rotl<7>(D);
C += (B ^ (D & (A ^ B))) + M2;
C = rotl<11>(C);
B += (A ^ (C & (D ^ A))) + M3;
B = rotl<19>(B);
}
inline void GG4(uint32_t& A, uint32_t& B, uint32_t& C, uint32_t& D,
uint32_t M0, uint32_t M1, uint32_t M2, uint32_t M3)
{
A += ((B & C) | (D & (B | C))) + M0 + 0x5A827999;
A = rotl<3>(A);
D += ((A & B) | (C & (A | B))) + M1 + 0x5A827999;
D = rotl<5>(D);
C += ((D & A) | (B & (D | A))) + M2 + 0x5A827999;
C = rotl<9>(C);
B += ((C & D) | (A & (C | D))) + M3 + 0x5A827999;
B = rotl<13>(B);
}
inline void HH4(uint32_t& A, uint32_t& B, uint32_t& C, uint32_t& D,
uint32_t M0, uint32_t M1, uint32_t M2, uint32_t M3)
{
A += (B ^ C ^ D) + M0 + 0x6ED9EBA1;
A = rotl<3>(A);
D += (A ^ B ^ C) + M1 + 0x6ED9EBA1;
D = rotl<9>(D);
C += (A ^ B ^ D) + M2 + 0x6ED9EBA1;
C = rotl<11>(C);
B += (A ^ C ^ D) + M3 + 0x6ED9EBA1;
B = rotl<15>(B);
}
}
/*
* MD4 Compression Function
*/
void MD4::compress_n(const uint8_t input[], size_t blocks)
{
uint32_t A = m_digest[0], B = m_digest[1], C = m_digest[2], D = m_digest[3];
for(size_t i = 0; i != blocks; ++i)
{
uint32_t M00 = load_le<uint32_t>(input, 0);
uint32_t M01 = load_le<uint32_t>(input, 1);
uint32_t M02 = load_le<uint32_t>(input, 2);
uint32_t M03 = load_le<uint32_t>(input, 3);
uint32_t M04 = load_le<uint32_t>(input, 4);
uint32_t M05 = load_le<uint32_t>(input, 5);
uint32_t M06 = load_le<uint32_t>(input, 6);
uint32_t M07 = load_le<uint32_t>(input, 7);
uint32_t M08 = load_le<uint32_t>(input, 8);
uint32_t M09 = load_le<uint32_t>(input, 9);
uint32_t M10 = load_le<uint32_t>(input, 10);
uint32_t M11 = load_le<uint32_t>(input, 11);
uint32_t M12 = load_le<uint32_t>(input, 12);
uint32_t M13 = load_le<uint32_t>(input, 13);
uint32_t M14 = load_le<uint32_t>(input, 14);
uint32_t M15 = load_le<uint32_t>(input, 15);
FF4(A, B, C, D, M00, M01, M02, M03);
FF4(A, B, C, D, M04, M05, M06, M07);
FF4(A, B, C, D, M08, M09, M10, M11);
FF4(A, B, C, D, M12, M13, M14, M15);
GG4(A, B, C, D, M00, M04, M08, M12);
GG4(A, B, C, D, M01, M05, M09, M13);
GG4(A, B, C, D, M02, M06, M10, M14);
GG4(A, B, C, D, M03, M07, M11, M15);
HH4(A, B, C, D, M00, M08, M04, M12);
HH4(A, B, C, D, M02, M10, M06, M14);
HH4(A, B, C, D, M01, M09, M05, M13);
HH4(A, B, C, D, M03, M11, M07, M15);
A = (m_digest[0] += A);
B = (m_digest[1] += B);
C = (m_digest[2] += C);
D = (m_digest[3] += D);
input += hash_block_size();
}
}
/*
* Copy out the digest
*/
void MD4::copy_out(uint8_t output[])
{
copy_out_vec_le(output, output_length(), m_digest);
}
/*
* Clear memory of sensitive data
*/
void MD4::clear()
{
MDx_HashFunction::clear();
m_digest[0] = 0x67452301;
m_digest[1] = 0xEFCDAB89;
m_digest[2] = 0x98BADCFE;
m_digest[3] = 0x10325476;
}
}
|
