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
|
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2010 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Michael Wallner <mike@php.net> |
| Sara Golemon <pollita@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php_hash.h"
#include "php_hash_snefru.h"
#include "php_hash_snefru_tables.h"
#define round(L, C, N, SB) \
SBE = SB[C & 0xff]; \
L ^= SBE; \
N ^= SBE
#ifndef DBG_SNEFRU
#define DBG_SNEFRU 0
#endif
#if DBG_SNEFRU
void ph(php_hash_uint32 h[16])
{
int i;
for (i = 0; i < 16; i++)
printf ("%08lx", h[i]); printf("\n");
}
#endif
static inline void Snefru(php_hash_uint32 input[16])
{
static int shifts[4] = {16, 8, 16, 24};
int b, index, rshift, lshift;
const php_hash_uint32 *t0,*t1;
php_hash_uint32 SBE,B00,B01,B02,B03,B04,B05,B06,B07,B08,B09,B10,B11,B12,B13,B14,B15;
B00 = input[0];
B01 = input[1];
B02 = input[2];
B03 = input[3];
B04 = input[4];
B05 = input[5];
B06 = input[6];
B07 = input[7];
B08 = input[8];
B09 = input[9];
B10 = input[10];
B11 = input[11];
B12 = input[12];
B13 = input[13];
B14 = input[14];
B15 = input[15];
for (index = 0; index < 8; index++) {
t0 = tables[2*index+0];
t1 = tables[2*index+1];
for (b = 0; b < 4; b++) {
round(B15, B00, B01, t0);
round(B00, B01, B02, t0);
round(B01, B02, B03, t1);
round(B02, B03, B04, t1);
round(B03, B04, B05, t0);
round(B04, B05, B06, t0);
round(B05, B06, B07, t1);
round(B06, B07, B08, t1);
round(B07, B08, B09, t0);
round(B08, B09, B10, t0);
round(B09, B10, B11, t1);
round(B10, B11, B12, t1);
round(B11, B12, B13, t0);
round(B12, B13, B14, t0);
round(B13, B14, B15, t1);
round(B14, B15, B00, t1);
rshift = shifts[b];
lshift = 32-rshift;
B00 = (B00 >> rshift) | (B00 << lshift);
B01 = (B01 >> rshift) | (B01 << lshift);
B02 = (B02 >> rshift) | (B02 << lshift);
B03 = (B03 >> rshift) | (B03 << lshift);
B04 = (B04 >> rshift) | (B04 << lshift);
B05 = (B05 >> rshift) | (B05 << lshift);
B06 = (B06 >> rshift) | (B06 << lshift);
B07 = (B07 >> rshift) | (B07 << lshift);
B08 = (B08 >> rshift) | (B08 << lshift);
B09 = (B09 >> rshift) | (B09 << lshift);
B10 = (B10 >> rshift) | (B10 << lshift);
B11 = (B11 >> rshift) | (B11 << lshift);
B12 = (B12 >> rshift) | (B12 << lshift);
B13 = (B13 >> rshift) | (B13 << lshift);
B14 = (B14 >> rshift) | (B14 << lshift);
B15 = (B15 >> rshift) | (B15 << lshift);
}
}
input[0] ^= B15;
input[1] ^= B14;
input[2] ^= B13;
input[3] ^= B12;
input[4] ^= B11;
input[5] ^= B10;
input[6] ^= B09;
input[7] ^= B08;
#if DBG_SNEFRU
ph(input);
#endif
}
static inline void SnefruTransform(PHP_SNEFRU_CTX *context, const unsigned char input[32])
{
int i, j;
for (i = 0, j = 0; i < 32; i += 4, ++j) {
context->state[8+j] = ((input[i] & 0xff) << 24) | ((input[i+1] & 0xff) << 16) |
((input[i+2] & 0xff) << 8) | (input[i+3] & 0xff);
}
Snefru(context->state);
memset(&context->state[8], 0, sizeof(php_hash_uint32) * 8);
}
PHP_HASH_API void PHP_SNEFRUInit(PHP_SNEFRU_CTX *context)
{
memset(context, 0, sizeof(*context));
}
static const php_hash_uint32 MAX32 = 0xffffffffLU;
PHP_HASH_API void PHP_SNEFRUUpdate(PHP_SNEFRU_CTX *context, const unsigned char *input, size_t len)
{
if ((MAX32 - context->count[1]) < (len * 8)) {
context->count[0]++;
context->count[1] = MAX32 - context->count[1];
context->count[1] = (len * 8) - context->count[1];
} else {
context->count[1] += len * 8;
}
if (context->length + len < 32) {
memcpy(&context->buffer[context->length], input, len);
context->length += len;
} else {
size_t i = 0, r = (context->length + len) % 32;
if (context->length) {
i = 32 - context->length;
memcpy(&context->buffer[context->length], input, i);
SnefruTransform(context, context->buffer);
}
for (; i + 32 <= len; i += 32) {
SnefruTransform(context, input + i);
}
memcpy(context->buffer, input + i, r);
memset(&context->buffer[r], 0, 32 - r);
context->length = r;
}
}
PHP_HASH_API void PHP_SNEFRUFinal(unsigned char digest[32], PHP_SNEFRU_CTX *context)
{
php_hash_uint32 i, j;
if (context->length) {
SnefruTransform(context, context->buffer);
}
context->state[14] = context->count[0];
context->state[15] = context->count[1];
Snefru(context->state);
for (i = 0, j = 0; j < 32; i++, j += 4) {
digest[j] = (unsigned char) ((context->state[i] >> 24) & 0xff);
digest[j + 1] = (unsigned char) ((context->state[i] >> 16) & 0xff);
digest[j + 2] = (unsigned char) ((context->state[i] >> 8) & 0xff);
digest[j + 3] = (unsigned char) (context->state[i] & 0xff);
}
memset(context, 0, sizeof(*context));
}
const php_hash_ops php_hash_snefru_ops = {
(php_hash_init_func_t) PHP_SNEFRUInit,
(php_hash_update_func_t) PHP_SNEFRUUpdate,
(php_hash_final_func_t) PHP_SNEFRUFinal,
(php_hash_copy_func_t) php_hash_copy,
32,
32,
sizeof(PHP_SNEFRU_CTX)
};
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
