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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
This code is written by kerukuro and released into public domain.
*/
#ifndef DIGESTPP_PROVIDERS_MD5_HPP
#define DIGESTPP_PROVIDERS_MD5_HPP
#include "../../detail/functions.hpp"
#include "../../detail/absorb_data.hpp"
#include "constants/md5_constants.hpp"
#include <array>
namespace digestpp
{
namespace detail
{
namespace md5_functions
{
static inline void roundf(int round, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d, const uint32_t* M)
{
a = b + rotate_left(a + (d ^ (b & (c ^ d))) + md5_constants<void>::K[round] + M[round],
md5_constants<void>::S[round]);
}
static inline void roundg(int round, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d, const uint32_t* M)
{
a = b + rotate_left(a + (c ^ (d & (b ^ c))) + md5_constants<void>::K[round] + M[(5 * round + 1) % 16],
md5_constants<void>::S[round]);
}
static inline void roundh(int round, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d, const uint32_t* M)
{
a = b + rotate_left(a + (b ^ c ^ d) + md5_constants<void>::K[round] + M[(3 * round + 5) % 16],
md5_constants<void>::S[round]);
}
static inline void roundi(int round, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d, const uint32_t* M)
{
a = b + rotate_left(a + (c ^ (b | ~d)) + md5_constants<void>::K[round] + M[(7 * round) % 16],
md5_constants<void>::S[round]);
}
}
class md5_provider
{
public:
static const bool is_xof = false;
md5_provider()
{
}
~md5_provider()
{
clear();
}
inline void init()
{
H[0] = 0x67452301;
H[1] = 0xefcdab89;
H[2] = 0x98badcfe;
H[3] = 0x10325476;
pos = 0;
total = 0;
}
inline void update(const unsigned char* data, size_t len)
{
detail::absorb_bytes(data, len, 64, 64, m.data(), pos, total,
[this](const unsigned char* data, size_t len) { transform(data, len); });
}
inline void final(unsigned char* hash)
{
total += pos * 8;
m[pos++] = 0x80;
if (pos > 56)
{
if (pos != 64)
memset(&m[pos], 0, 64 - pos);
transform(&m[0], 1);
pos = 0;
}
memset(&m[0] + pos, 0, 56 - pos);
memcpy(&m[0] + (64 - 8), &total, 64 / 8);
transform(&m[0], 1);
memcpy(hash, H.data(), 16);
}
inline void clear()
{
zero_memory(H);
zero_memory(m);
}
inline size_t hash_size() const { return 128; }
private:
inline void transform(const unsigned char* data, size_t num_blks)
{
const uint32_t* M = reinterpret_cast<const uint32_t*>(data);
for (uint64_t blk = 0; blk < num_blks; blk++, M += 16)
{
uint32_t a = H[0];
uint32_t b = H[1];
uint32_t c = H[2];
uint32_t d = H[3];
md5_functions::roundf(0, a, b, c, d, M);
md5_functions::roundf(1, d, a, b, c, M);
md5_functions::roundf(2, c, d, a, b, M);
md5_functions::roundf(3, b, c, d, a, M);
md5_functions::roundf(4, a, b, c, d, M);
md5_functions::roundf(5, d, a, b, c, M);
md5_functions::roundf(6, c, d, a, b, M);
md5_functions::roundf(7, b, c, d, a, M);
md5_functions::roundf(8, a, b, c, d, M);
md5_functions::roundf(9, d, a, b, c, M);
md5_functions::roundf(10, c, d, a, b, M);
md5_functions::roundf(11, b, c, d, a, M);
md5_functions::roundf(12, a, b, c, d, M);
md5_functions::roundf(13, d, a, b, c, M);
md5_functions::roundf(14, c, d, a, b, M);
md5_functions::roundf(15, b, c, d, a, M);
md5_functions::roundg(16, a, b, c, d, M);
md5_functions::roundg(17, d, a, b, c, M);
md5_functions::roundg(18, c, d, a, b, M);
md5_functions::roundg(19, b, c, d, a, M);
md5_functions::roundg(20, a, b, c, d, M);
md5_functions::roundg(21, d, a, b, c, M);
md5_functions::roundg(22, c, d, a, b, M);
md5_functions::roundg(23, b, c, d, a, M);
md5_functions::roundg(24, a, b, c, d, M);
md5_functions::roundg(25, d, a, b, c, M);
md5_functions::roundg(26, c, d, a, b, M);
md5_functions::roundg(27, b, c, d, a, M);
md5_functions::roundg(28, a, b, c, d, M);
md5_functions::roundg(29, d, a, b, c, M);
md5_functions::roundg(30, c, d, a, b, M);
md5_functions::roundg(31, b, c, d, a, M);
md5_functions::roundh(32, a, b, c, d, M);
md5_functions::roundh(33, d, a, b, c, M);
md5_functions::roundh(34, c, d, a, b, M);
md5_functions::roundh(35, b, c, d, a, M);
md5_functions::roundh(36, a, b, c, d, M);
md5_functions::roundh(37, d, a, b, c, M);
md5_functions::roundh(38, c, d, a, b, M);
md5_functions::roundh(39, b, c, d, a, M);
md5_functions::roundh(40, a, b, c, d, M);
md5_functions::roundh(41, d, a, b, c, M);
md5_functions::roundh(42, c, d, a, b, M);
md5_functions::roundh(43, b, c, d, a, M);
md5_functions::roundh(44, a, b, c, d, M);
md5_functions::roundh(45, d, a, b, c, M);
md5_functions::roundh(46, c, d, a, b, M);
md5_functions::roundh(47, b, c, d, a, M);
md5_functions::roundi(48, a, b, c, d, M);
md5_functions::roundi(49, d, a, b, c, M);
md5_functions::roundi(50, c, d, a, b, M);
md5_functions::roundi(51, b, c, d, a, M);
md5_functions::roundi(52, a, b, c, d, M);
md5_functions::roundi(53, d, a, b, c, M);
md5_functions::roundi(54, c, d, a, b, M);
md5_functions::roundi(55, b, c, d, a, M);
md5_functions::roundi(56, a, b, c, d, M);
md5_functions::roundi(57, d, a, b, c, M);
md5_functions::roundi(58, c, d, a, b, M);
md5_functions::roundi(59, b, c, d, a, M);
md5_functions::roundi(60, a, b, c, d, M);
md5_functions::roundi(61, d, a, b, c, M);
md5_functions::roundi(62, c, d, a, b, M);
md5_functions::roundi(63, b, c, d, a, M);
H[0] += a;
H[1] += b;
H[2] += c;
H[3] += d;
}
}
std::array<uint32_t, 4> H;
std::array<unsigned char, 64> m;
size_t pos;
uint64_t total;
};
} // namespace detail
} // namespace digestpp
#endif
|
