Annotation of embedaddon/php/ext/hash/hash_tiger.c, revision 1.1.1.3
1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
1.1.1.3 ! misho 5: | Copyright (c) 1997-2013 The PHP Group |
1.1 misho 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_tiger.h"
24: #include "php_hash_tiger_tables.h"
25:
26: #if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__))
27: # if defined(__LITTLE_ENDIAN__)
28: # undef WORDS_BIGENDIAN
29: # else
30: # if defined(__BIG_ENDIAN__)
31: # define WORDS_BIGENDIAN
32: # endif
33: # endif
34: #endif
35:
36: /* {{{ */
37: #define save_abc \
38: aa = a; \
39: bb = b; \
40: cc = c;
41:
42: #define round(a,b,c,x,mul) \
43: c ^= x; \
44: a -= t1[(unsigned char)(c)] ^ \
45: t2[(unsigned char)(((php_hash_uint32)(c))>>(2*8))] ^ \
46: t3[(unsigned char)((c)>>(4*8))] ^ \
47: t4[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(2*8))] ; \
48: b += t4[(unsigned char)(((php_hash_uint32)(c))>>(1*8))] ^ \
49: t3[(unsigned char)(((php_hash_uint32)(c))>>(3*8))] ^ \
50: t2[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(1*8))] ^ \
51: t1[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(3*8))]; \
52: b *= mul;
53:
54: #define pass(a,b,c,mul) \
55: round(a,b,c,x0,mul) \
56: round(b,c,a,x1,mul) \
57: round(c,a,b,x2,mul) \
58: round(a,b,c,x3,mul) \
59: round(b,c,a,x4,mul) \
60: round(c,a,b,x5,mul) \
61: round(a,b,c,x6,mul) \
62: round(b,c,a,x7,mul)
63:
64: #define key_schedule \
65: x0 -= x7 ^ L64(0xA5A5A5A5A5A5A5A5); \
66: x1 ^= x0; \
67: x2 += x1; \
68: x3 -= x2 ^ ((~x1)<<19); \
69: x4 ^= x3; \
70: x5 += x4; \
71: x6 -= x5 ^ ((~x4)>>23); \
72: x7 ^= x6; \
73: x0 += x7; \
74: x1 -= x0 ^ ((~x7)<<19); \
75: x2 ^= x1; \
76: x3 += x2; \
77: x4 -= x3 ^ ((~x2)>>23); \
78: x5 ^= x4; \
79: x6 += x5; \
80: x7 -= x6 ^ L64(0x0123456789ABCDEF);
81:
82: #define feedforward \
83: a ^= aa; \
84: b -= bb; \
85: c += cc;
86:
87: #define compress(passes) \
88: save_abc \
89: pass(a,b,c,5) \
90: key_schedule \
91: pass(c,a,b,7) \
92: key_schedule \
93: pass(b,c,a,9) \
94: for(pass_no=0; pass_no<passes; pass_no++) { \
95: key_schedule \
96: pass(a,b,c,9) \
97: tmpa=a; a=c; c=b; b=tmpa; \
98: } \
99: feedforward
100:
101: #define split_ex(str) \
102: x0=str[0]; x1=str[1]; x2=str[2]; x3=str[3]; \
103: x4=str[4]; x5=str[5]; x6=str[6]; x7=str[7];
104: #ifdef WORDS_BIGENDIAN
105: # define split(str) \
106: { \
107: int i; \
108: php_hash_uint64 tmp[8]; \
109: \
110: for (i = 0; i < 64; ++i) { \
111: ((unsigned char *) tmp)[i^7] = ((unsigned char *) str)[i]; \
112: } \
113: split_ex(tmp); \
114: }
115: #else
116: # define split split_ex
117: #endif
118:
119: #define tiger_compress(passes, str, state) \
120: { \
121: register php_hash_uint64 a, b, c, tmpa, x0, x1, x2, x3, x4, x5, x6, x7; \
122: php_hash_uint64 aa, bb, cc; \
1.1.1.2 misho 123: unsigned int pass_no; \
1.1 misho 124: \
125: a = state[0]; \
126: b = state[1]; \
127: c = state[2]; \
128: \
129: split(str); \
130: \
131: compress(passes); \
132: \
133: state[0] = a; \
134: state[1] = b; \
135: state[2] = c; \
136: }
137: /* }}} */
138:
139: static inline void TigerFinalize(PHP_TIGER_CTX *context)
140: {
141: context->passed += (php_hash_uint64) context->length << 3;
142:
143: context->buffer[context->length++] = 0x1;
144: if (context->length % 8) {
145: memset(&context->buffer[context->length], 0, 8-context->length%8);
146: context->length += 8-context->length%8;
147: }
148:
149: if (context->length > 56) {
150: memset(&context->buffer[context->length], 0, 64 - context->length);
151: tiger_compress(context->passes, ((php_hash_uint64 *) context->buffer), context->state);
152: memset(context->buffer, 0, 56);
153: } else {
154: memset(&context->buffer[context->length], 0, 56 - context->length);
155: }
156:
157: #ifndef WORDS_BIGENDIAN
158: memcpy(&context->buffer[56], &context->passed, sizeof(php_hash_uint64));
159: #else
160: context->buffer[56] = (unsigned char) (context->passed & 0xff);
161: context->buffer[57] = (unsigned char) ((context->passed >> 8) & 0xff);
162: context->buffer[58] = (unsigned char) ((context->passed >> 16) & 0xff);
163: context->buffer[59] = (unsigned char) ((context->passed >> 24) & 0xff);
164: context->buffer[60] = (unsigned char) ((context->passed >> 32) & 0xff);
165: context->buffer[61] = (unsigned char) ((context->passed >> 40) & 0xff);
166: context->buffer[62] = (unsigned char) ((context->passed >> 48) & 0xff);
167: context->buffer[63] = (unsigned char) ((context->passed >> 56) & 0xff);
168: #endif
169: tiger_compress(context->passes, ((php_hash_uint64 *) context->buffer), context->state);
170: }
171:
1.1.1.2 misho 172: static inline void TigerDigest(unsigned char *digest_str, unsigned int digest_len, PHP_TIGER_CTX *context)
173: {
174: unsigned int i;
175:
176: for (i = 0; i < digest_len; ++i) {
177: digest_str[i] = (unsigned char) ((context->state[i/8] >> (8 * (i%8))) & 0xff);
178: }
179: }
180:
1.1 misho 181: PHP_HASH_API void PHP_3TIGERInit(PHP_TIGER_CTX *context)
182: {
183: memset(context, 0, sizeof(*context));
184: context->state[0] = L64(0x0123456789ABCDEF);
185: context->state[1] = L64(0xFEDCBA9876543210);
186: context->state[2] = L64(0xF096A5B4C3B2E187);
187: }
188:
189: PHP_HASH_API void PHP_4TIGERInit(PHP_TIGER_CTX *context)
190: {
191: memset(context, 0, sizeof(*context));
192: context->passes = 1;
193: context->state[0] = L64(0x0123456789ABCDEF);
194: context->state[1] = L64(0xFEDCBA9876543210);
195: context->state[2] = L64(0xF096A5B4C3B2E187);
196: }
197:
198: PHP_HASH_API void PHP_TIGERUpdate(PHP_TIGER_CTX *context, const unsigned char *input, size_t len)
199: {
200: if (context->length + len < 64) {
201: memcpy(&context->buffer[context->length], input, len);
202: context->length += len;
203: } else {
204: size_t i = 0, r = (context->length + len) % 64;
205:
206: if (context->length) {
207: i = 64 - context->length;
208: memcpy(&context->buffer[context->length], input, i);
209: tiger_compress(context->passes, ((const php_hash_uint64 *) context->buffer), context->state);
210: memset(context->buffer, 0, 64);
211: context->passed += 512;
212: }
213:
214: for (; i + 64 <= len; i += 64) {
215: memcpy(context->buffer, &input[i], 64);
216: tiger_compress(context->passes, ((const php_hash_uint64 *) context->buffer), context->state);
217: context->passed += 512;
218: }
219: memset(&context->buffer[r], 0, 64-r);
220: memcpy(context->buffer, &input[i], r);
221: context->length = r;
222: }
223: }
224:
225: PHP_HASH_API void PHP_TIGER128Final(unsigned char digest[16], PHP_TIGER_CTX *context)
226: {
227: TigerFinalize(context);
1.1.1.2 misho 228: TigerDigest(digest, 16, context);
1.1 misho 229: memset(context, 0, sizeof(*context));
230: }
231:
232: PHP_HASH_API void PHP_TIGER160Final(unsigned char digest[20], PHP_TIGER_CTX *context)
233: {
234: TigerFinalize(context);
1.1.1.2 misho 235: TigerDigest(digest, 20, context);
1.1 misho 236: memset(context, 0, sizeof(*context));
237: }
238:
239: PHP_HASH_API void PHP_TIGER192Final(unsigned char digest[24], PHP_TIGER_CTX *context)
240: {
241: TigerFinalize(context);
1.1.1.2 misho 242: TigerDigest(digest, 24, context);
1.1 misho 243: memset(context, 0, sizeof(*context));
244: }
245:
246: #define PHP_HASH_TIGER_OPS(p, b) \
247: const php_hash_ops php_hash_##p##tiger##b##_ops = { \
248: (php_hash_init_func_t) PHP_##p##TIGERInit, \
249: (php_hash_update_func_t) PHP_TIGERUpdate, \
250: (php_hash_final_func_t) PHP_TIGER##b##Final, \
251: (php_hash_copy_func_t) php_hash_copy, \
252: b/8, \
253: 64, \
254: sizeof(PHP_TIGER_CTX) \
255: }
256:
257: PHP_HASH_TIGER_OPS(3, 128);
258: PHP_HASH_TIGER_OPS(3, 160);
259: PHP_HASH_TIGER_OPS(3, 192);
260: PHP_HASH_TIGER_OPS(4, 128);
261: PHP_HASH_TIGER_OPS(4, 160);
262: PHP_HASH_TIGER_OPS(4, 192);
263:
264: /*
265: * Local variables:
266: * tab-width: 4
267: * c-basic-offset: 4
268: * End:
269: * vim600: sw=4 ts=4 fdm=marker
270: * vim<600: sw=4 ts=4
271: */
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