blob: dda6ecd7ff05067adf9d48a6e9b67c6d926e6090 (
plain)
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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/********************* */
/*! \file sha1.hpp
** \verbatim
** Original author: Dejan Jovanović <dejan.jovanovic@gmail.com>
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
// boost/uuid/sha1.hpp header file ----------------------------------------------//
// Copyright 2007 Andy Tompkins.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Revision History
// 29 May 2007 - Initial Revision
// 25 Feb 2008 - moved to namespace boost::uuids::detail
// This is a byte oriented implementation
// Note: this implementation does not handle message longer than
// 2^32 bytes.
#pragma once
#include <boost/static_assert.hpp>
#include <cstddef>
#include "word.h"
#ifdef BOOST_NO_STDC_NAMESPACE
namespace std {
using ::size_t;
} // namespace std
#endif
namespace hashsmt {
BOOST_STATIC_ASSERT(sizeof(unsigned char)*8 == 8);
BOOST_STATIC_ASSERT(sizeof(unsigned int)*8 == 32);
inline cvc4_uint32 left_rotate(cvc4_uint32 x, std::size_t n)
{
return (x<<n) ^ (x>> (32-n));
}
class sha1
{
public:
typedef cvc4_uint32(&digest_type)[5];
public:
sha1();
void reset();
void process_byte(cvc4_uchar8 byte);
void process_block(void const* bytes_begin, void const* bytes_end);
void process_bytes(void const* buffer, std::size_t byte_count);
void get_digest(digest_type digest);
private:
void process_block();
private:
cvc4_uint32 h_[5];
cvc4_uchar8 block_[64];
std::size_t block_byte_index_;
std::size_t byte_count_;
};
inline sha1::sha1()
{
reset();
}
inline void sha1::reset()
{
h_[0] = 0x67452301;
h_[1] = 0xEFCDAB89;
h_[2] = 0x98BADCFE;
h_[3] = 0x10325476;
h_[4] = 0xC3D2E1F0;
block_byte_index_ = 0;
byte_count_ = 0;
}
inline void sha1::process_byte(cvc4_uchar8 byte)
{
block_[block_byte_index_++] = byte;
++byte_count_;
if (block_byte_index_ == 64) {
block_byte_index_ = 0;
process_block();
}
}
inline void sha1::process_block(void const* bytes_begin, void const* bytes_end)
{
cvc4_uchar8 const* begin = static_cast<cvc4_uchar8 const*>(bytes_begin);
cvc4_uchar8 const* end = static_cast<cvc4_uchar8 const*>(bytes_end);
for(; begin != end; ++begin) {
process_byte(*begin);
}
}
inline void sha1::process_bytes(void const* buffer, std::size_t byte_count)
{
cvc4_uchar8 const* b = static_cast<cvc4_uchar8 const*>(buffer);
process_block(b, b+byte_count);
}
inline void sha1::process_block()
{
cvc4_uint32 w[80];
for (std::size_t i=0; i<16; ++i) {
w[i] = (block_[i*4 + 0] << 24);
w[i] |= (block_[i*4 + 1] << 16);
w[i] |= (block_[i*4 + 2] << 8);
w[i] |= (block_[i*4 + 3]);
}
for (std::size_t i=16; i<80; ++i) {
w[i] = left_rotate((w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]), 1);
}
cvc4_uint32 a = h_[0];
cvc4_uint32 b = h_[1];
cvc4_uint32 c = h_[2];
cvc4_uint32 d = h_[3];
cvc4_uint32 e = h_[4];
for (std::size_t i=0; i<80; ++i) {
cvc4_uint32 f;
cvc4_uint32 k;
if (i<20) {
f = (b & c) | (~b & d);
k = 0x5A827999;
} else if (i<40) {
f = b ^ c ^ d;
k = 0x6ED9EBA1;
} else if (i<60) {
f = (b & c) | (b & d) | (c & d);
k = 0x8F1BBCDC;
} else {
f = b ^ c ^ d;
k = 0xCA62C1D6;
}
cvc4_uint32 temp = left_rotate(a, 5) + f + e + k + w[i];
e = d;
d = c;
c = left_rotate(b, 30);
b = a;
a = temp;
}
h_[0] += a;
h_[1] += b;
h_[2] += c;
h_[3] += d;
h_[4] += e;
}
inline void sha1::get_digest(digest_type digest)
{
std::size_t bit_count = byte_count_*8;
// append the bit '1' to the message
process_byte(0x80);
// append k bits '0', where k is the minimum number >= 0
// such that the resulting message length is congruent to 56 (mod 64)
// check if there is enough space for padding and bit_count
if (block_byte_index_ > 56) {
// finish this block
while (block_byte_index_ != 0) {
process_byte(0);
}
// one more block
while (block_byte_index_ < 56) {
process_byte(0);
}
} else {
while (block_byte_index_ < 56) {
process_byte(0);
}
}
// append length of message (before pre-processing)
// as a 64-bit big-endian integer
process_byte(0);
process_byte(0);
process_byte(0);
process_byte(0);
process_byte( static_cast<unsigned char>((bit_count>>24) & 0xFF));
process_byte( static_cast<unsigned char>((bit_count>>16) & 0xFF));
process_byte( static_cast<unsigned char>((bit_count>>8 ) & 0xFF));
process_byte( static_cast<unsigned char>((bit_count) & 0xFF));
// get final digest
digest[0] = h_[0];
digest[1] = h_[1];
digest[2] = h_[2];
digest[3] = h_[3];
digest[4] = h_[4];
}
} // namespace hashsmt
|
