1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2013 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Michael Wallner <mike@php.net> |
16 | Sara Golemon <pollita@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 #include "php_hash.h"
23 #include "php_hash_snefru.h"
24 #include "php_hash_snefru_tables.h"
25
26 #define round(L, C, N, SB) \
27 SBE = SB[C & 0xff]; \
28 L ^= SBE; \
29 N ^= SBE
30
31 #ifndef DBG_SNEFRU
32 #define DBG_SNEFRU 0
33 #endif
34
35 #if DBG_SNEFRU
ph(php_hash_uint32 h[16])36 void ph(php_hash_uint32 h[16])
37 {
38 int i;
39 for (i = 0; i < 16; i++)
40 printf ("%08lx", h[i]); printf("\n");
41 }
42 #endif
43
Snefru(php_hash_uint32 input[16])44 static inline void Snefru(php_hash_uint32 input[16])
45 {
46 static int shifts[4] = {16, 8, 16, 24};
47 int b, index, rshift, lshift;
48 const php_hash_uint32 *t0,*t1;
49 php_hash_uint32 SBE,B00,B01,B02,B03,B04,B05,B06,B07,B08,B09,B10,B11,B12,B13,B14,B15;
50
51 B00 = input[0];
52 B01 = input[1];
53 B02 = input[2];
54 B03 = input[3];
55 B04 = input[4];
56 B05 = input[5];
57 B06 = input[6];
58 B07 = input[7];
59 B08 = input[8];
60 B09 = input[9];
61 B10 = input[10];
62 B11 = input[11];
63 B12 = input[12];
64 B13 = input[13];
65 B14 = input[14];
66 B15 = input[15];
67
68 for (index = 0; index < 8; index++) {
69 t0 = tables[2*index+0];
70 t1 = tables[2*index+1];
71 for (b = 0; b < 4; b++) {
72 round(B15, B00, B01, t0);
73 round(B00, B01, B02, t0);
74 round(B01, B02, B03, t1);
75 round(B02, B03, B04, t1);
76 round(B03, B04, B05, t0);
77 round(B04, B05, B06, t0);
78 round(B05, B06, B07, t1);
79 round(B06, B07, B08, t1);
80 round(B07, B08, B09, t0);
81 round(B08, B09, B10, t0);
82 round(B09, B10, B11, t1);
83 round(B10, B11, B12, t1);
84 round(B11, B12, B13, t0);
85 round(B12, B13, B14, t0);
86 round(B13, B14, B15, t1);
87 round(B14, B15, B00, t1);
88
89 rshift = shifts[b];
90 lshift = 32-rshift;
91
92 B00 = (B00 >> rshift) | (B00 << lshift);
93 B01 = (B01 >> rshift) | (B01 << lshift);
94 B02 = (B02 >> rshift) | (B02 << lshift);
95 B03 = (B03 >> rshift) | (B03 << lshift);
96 B04 = (B04 >> rshift) | (B04 << lshift);
97 B05 = (B05 >> rshift) | (B05 << lshift);
98 B06 = (B06 >> rshift) | (B06 << lshift);
99 B07 = (B07 >> rshift) | (B07 << lshift);
100 B08 = (B08 >> rshift) | (B08 << lshift);
101 B09 = (B09 >> rshift) | (B09 << lshift);
102 B10 = (B10 >> rshift) | (B10 << lshift);
103 B11 = (B11 >> rshift) | (B11 << lshift);
104 B12 = (B12 >> rshift) | (B12 << lshift);
105 B13 = (B13 >> rshift) | (B13 << lshift);
106 B14 = (B14 >> rshift) | (B14 << lshift);
107 B15 = (B15 >> rshift) | (B15 << lshift);
108 }
109 }
110 input[0] ^= B15;
111 input[1] ^= B14;
112 input[2] ^= B13;
113 input[3] ^= B12;
114 input[4] ^= B11;
115 input[5] ^= B10;
116 input[6] ^= B09;
117 input[7] ^= B08;
118 #if DBG_SNEFRU
119 ph(input);
120 #endif
121 }
122
SnefruTransform(PHP_SNEFRU_CTX * context,const unsigned char input[32])123 static inline void SnefruTransform(PHP_SNEFRU_CTX *context, const unsigned char input[32])
124 {
125 int i, j;
126
127 for (i = 0, j = 0; i < 32; i += 4, ++j) {
128 context->state[8+j] = ((input[i] & 0xff) << 24) | ((input[i+1] & 0xff) << 16) |
129 ((input[i+2] & 0xff) << 8) | (input[i+3] & 0xff);
130 }
131 Snefru(context->state);
132 memset(&context->state[8], 0, sizeof(php_hash_uint32) * 8);
133 }
134
PHP_SNEFRUInit(PHP_SNEFRU_CTX * context)135 PHP_HASH_API void PHP_SNEFRUInit(PHP_SNEFRU_CTX *context)
136 {
137 memset(context, 0, sizeof(*context));
138 }
139
140 static const php_hash_uint32 MAX32 = 0xffffffffLU;
141
PHP_SNEFRUUpdate(PHP_SNEFRU_CTX * context,const unsigned char * input,size_t len)142 PHP_HASH_API void PHP_SNEFRUUpdate(PHP_SNEFRU_CTX *context, const unsigned char *input, size_t len)
143 {
144 if ((MAX32 - context->count[1]) < (len * 8)) {
145 context->count[0]++;
146 context->count[1] = MAX32 - context->count[1];
147 context->count[1] = (len * 8) - context->count[1];
148 } else {
149 context->count[1] += len * 8;
150 }
151
152 if (context->length + len < 32) {
153 memcpy(&context->buffer[context->length], input, len);
154 context->length += len;
155 } else {
156 size_t i = 0, r = (context->length + len) % 32;
157
158 if (context->length) {
159 i = 32 - context->length;
160 memcpy(&context->buffer[context->length], input, i);
161 SnefruTransform(context, context->buffer);
162 }
163
164 for (; i + 32 <= len; i += 32) {
165 SnefruTransform(context, input + i);
166 }
167
168 memcpy(context->buffer, input + i, r);
169 memset(&context->buffer[r], 0, 32 - r);
170 context->length = r;
171 }
172 }
173
PHP_SNEFRUFinal(unsigned char digest[32],PHP_SNEFRU_CTX * context)174 PHP_HASH_API void PHP_SNEFRUFinal(unsigned char digest[32], PHP_SNEFRU_CTX *context)
175 {
176 php_hash_uint32 i, j;
177
178 if (context->length) {
179 SnefruTransform(context, context->buffer);
180 }
181
182 context->state[14] = context->count[0];
183 context->state[15] = context->count[1];
184 Snefru(context->state);
185
186 for (i = 0, j = 0; j < 32; i++, j += 4) {
187 digest[j] = (unsigned char) ((context->state[i] >> 24) & 0xff);
188 digest[j + 1] = (unsigned char) ((context->state[i] >> 16) & 0xff);
189 digest[j + 2] = (unsigned char) ((context->state[i] >> 8) & 0xff);
190 digest[j + 3] = (unsigned char) (context->state[i] & 0xff);
191 }
192
193 memset(context, 0, sizeof(*context));
194 }
195
196 const php_hash_ops php_hash_snefru_ops = {
197 (php_hash_init_func_t) PHP_SNEFRUInit,
198 (php_hash_update_func_t) PHP_SNEFRUUpdate,
199 (php_hash_final_func_t) PHP_SNEFRUFinal,
200 (php_hash_copy_func_t) php_hash_copy,
201 32,
202 32,
203 sizeof(PHP_SNEFRU_CTX)
204 };
205
206 /*
207 * Local variables:
208 * tab-width: 4
209 * c-basic-offset: 4
210 * End:
211 * vim600: sw=4 ts=4 fdm=marker
212 * vim<600: sw=4 ts=4
213 */
214
