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1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1997-2012 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:
1.1.1.2 ! misho 20: /* $Id$ */
1.1 misho 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
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:
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:
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:
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:
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:
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: */