xref: /PHP-7.3/ext/hash/hash_gost.c (revision 8d3f8ca1)
1 /*
2   +----------------------------------------------------------------------+
3   | PHP Version 7                                                        |
4   +----------------------------------------------------------------------+
5   | Copyright (c) 1997-2018 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 #include "php_hash.h"
21 #include "php_hash_gost.h"
22 #include "php_hash_gost_tables.h"
23 
24 /* {{{ Gost()
25  * derived from gost_compress() by Markku-Juhani Saarinen <mjos@ssh.fi>
26  */
27 
28 #define round(tables, k1, k2) \
29 	t = (k1) + r; \
30 	l ^= tables[0][t & 0xff] ^ tables[1][(t >> 8) & 0xff] ^ \
31 		tables[2][(t >> 16) & 0xff] ^ tables[3][t >> 24]; \
32 	t = (k2) + l; \
33 	r ^= tables[0][t & 0xff] ^ tables[1][(t >> 8) & 0xff] ^ \
34 		tables[2][(t >> 16) & 0xff] ^ tables[3][t >> 24];
35 
36 #define R(tables, key, h, i, t, l, r) \
37 	r = h[i]; \
38 	l = h[i + 1]; \
39 	round(tables, key[0], key[1]) \
40 	round(tables, key[2], key[3]) \
41 	round(tables, key[4], key[5]) \
42 	round(tables, key[6], key[7]) \
43 	round(tables, key[0], key[1]) \
44 	round(tables, key[2], key[3]) \
45 	round(tables, key[4], key[5]) \
46 	round(tables, key[6], key[7]) \
47 	round(tables, key[0], key[1]) \
48 	round(tables, key[2], key[3]) \
49 	round(tables, key[4], key[5]) \
50 	round(tables, key[6], key[7]) \
51 	round(tables, key[7], key[6]) \
52 	round(tables, key[5], key[4]) \
53 	round(tables, key[3], key[2]) \
54 	round(tables, key[1], key[0]) \
55 	t = r; \
56 	r = l; \
57 	l = t; \
58 
59 #define X(w, u, v) \
60 	w[0] = u[0] ^ v[0]; \
61 	w[1] = u[1] ^ v[1]; \
62 	w[2] = u[2] ^ v[2]; \
63 	w[3] = u[3] ^ v[3]; \
64 	w[4] = u[4] ^ v[4]; \
65 	w[5] = u[5] ^ v[5]; \
66 	w[6] = u[6] ^ v[6]; \
67 	w[7] = u[7] ^ v[7];
68 
69 #define P(key, w) \
70 	key[0] = (w[0]  & 0x000000ff) | ((w[2] & 0x000000ff) << 8) | \
71 		((w[4] & 0x000000ff) << 16) | ((w[6] & 0x000000ff) << 24); \
72 	key[1] = ((w[0] & 0x0000ff00) >> 8)  | (w[2]  & 0x0000ff00) | \
73 		((w[4] & 0x0000ff00) << 8) | ((w[6] & 0x0000ff00) << 16); \
74 	key[2] = ((w[0] & 0x00ff0000) >> 16) | ((w[2] & 0x00ff0000) >> 8) | \
75 		(w[4] & 0x00ff0000) | ((w[6] & 0x00ff0000) << 8); \
76 	key[3] = ((w[0] & 0xff000000) >> 24) | ((w[2] & 0xff000000) >> 16) | \
77 		((w[4] & 0xff000000) >> 8) | (w[6] & 0xff000000); \
78 	key[4] = (w[1] & 0x000000ff) | ((w[3] & 0x000000ff) << 8) | \
79 		((w[5] & 0x000000ff) << 16) | ((w[7] & 0x000000ff) << 24); \
80 	key[5] = ((w[1] & 0x0000ff00) >> 8) | (w[3]  & 0x0000ff00) | \
81 		((w[5] & 0x0000ff00) << 8) | ((w[7] & 0x0000ff00) << 16); \
82 	key[6] = ((w[1] & 0x00ff0000) >> 16) | ((w[3] & 0x00ff0000) >> 8) | \
83 		(w[5] & 0x00ff0000) | ((w[7] & 0x00ff0000) << 8); \
84 	key[7] = ((w[1] & 0xff000000) >> 24) | ((w[3] & 0xff000000) >> 16) | \
85 		((w[5] & 0xff000000) >> 8) | (w[7] & 0xff000000);
86 
87 #define A(x, l, r) \
88 	l = x[0] ^ x[2]; \
89 	r = x[1] ^ x[3]; \
90 	x[0] = x[2]; \
91 	x[1] = x[3]; \
92 	x[2] = x[4]; \
93 	x[3] = x[5]; \
94 	x[4] = x[6]; \
95 	x[5] = x[7]; \
96 	x[6] = l; \
97 	x[7] = r;
98 
99 #define AA(x, l, r) \
100 	l = x[0]; \
101 	r = x[2]; \
102 	x[0] = x[4]; \
103 	x[2] = x[6]; \
104 	x[4] = l ^ r; \
105 	x[6] = x[0] ^ r; \
106 	l = x[1]; \
107 	r = x[3]; \
108 	x[1] = x[5]; \
109 	x[3] = x[7]; \
110 	x[5] = l ^ r; \
111 	x[7] = x[1] ^ r;
112 
113 #define C(x) \
114 	x[0] ^= 0xff00ff00; \
115 	x[1] ^= 0xff00ff00; \
116 	x[2] ^= 0x00ff00ff; \
117 	x[3] ^= 0x00ff00ff; \
118 	x[4] ^= 0x00ffff00; \
119 	x[5] ^= 0xff0000ff; \
120 	x[6] ^= 0x000000ff; \
121 	x[7] ^= 0xff00ffff;
122 
123 #define S(s, l, r) \
124 		s[i] = r; \
125 		s[i + 1] = l;
126 
127 #define SHIFT12(u, m, s) \
128 	u[0] = m[0] ^ s[6]; \
129 	u[1] = m[1] ^ s[7]; \
130 	u[2] = m[2] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff) ^ \
131 		(s[1] & 0xffff) ^ (s[1] >> 16) ^ (s[2] << 16) ^ s[6] ^ (s[6] << 16) ^ \
132 		(s[7] & 0xffff0000) ^ (s[7] >> 16); \
133 	u[3] = m[3] ^ (s[0] & 0xffff) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^ \
134 		(s[1] << 16) ^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^ \
135 		(s[3] << 16) ^ s[6] ^ (s[6] << 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^ \
136 		(s[7] << 16) ^ (s[7] >> 16); \
137 	u[4] = m[4] ^ \
138 		(s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[0] >> 16) ^ \
139 		(s[1] & 0xffff0000) ^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^ \
140 		(s[3] << 16) ^ (s[3] >> 16) ^ (s[4] << 16) ^ (s[6] << 16) ^ \
141 		(s[6] >> 16) ^(s[7] & 0xffff) ^ (s[7] << 16) ^ (s[7] >> 16); \
142 	u[5] = m[5] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff0000) ^ \
143 		(s[1] & 0xffff) ^ s[2] ^ (s[2] >> 16) ^ (s[3] << 16) ^ (s[3] >> 16) ^ \
144 		(s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^  (s[6] << 16) ^ \
145 		(s[6] >> 16) ^ (s[7] & 0xffff0000) ^ (s[7] << 16) ^ (s[7] >> 16); \
146 	u[6] = m[6] ^ s[0] ^ (s[1] >> 16) ^ (s[2] << 16) ^ s[3] ^ (s[3] >> 16) ^ \
147 		(s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^ (s[5] >> 16) ^ s[6] ^ \
148 		(s[6] << 16) ^ (s[6] >> 16) ^ (s[7] << 16); \
149 	u[7] = m[7] ^ (s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^ \
150 		(s[1] << 16) ^ (s[2] >> 16) ^ (s[3] << 16) ^ s[4] ^ (s[4] >> 16) ^ \
151 		(s[5] << 16) ^ (s[5] >> 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^ \
152 		(s[7] << 16) ^ (s[7] >> 16);
153 
154 #define SHIFT16(h, v, u) \
155 	v[0] = h[0] ^ (u[1] << 16) ^ (u[0] >> 16); \
156 	v[1] = h[1] ^ (u[2] << 16) ^ (u[1] >> 16); \
157 	v[2] = h[2] ^ (u[3] << 16) ^ (u[2] >> 16); \
158 	v[3] = h[3] ^ (u[4] << 16) ^ (u[3] >> 16); \
159 	v[4] = h[4] ^ (u[5] << 16) ^ (u[4] >> 16); \
160 	v[5] = h[5] ^ (u[6] << 16) ^ (u[5] >> 16); \
161 	v[6] = h[6] ^ (u[7] << 16) ^ (u[6] >> 16); \
162 	v[7] = h[7] ^ (u[0] & 0xffff0000) ^ (u[0] << 16) ^ (u[7] >> 16) ^ \
163 		(u[1] & 0xffff0000) ^ (u[1] << 16) ^ (u[6] << 16) ^ (u[7] & 0xffff0000);
164 
165 #define SHIFT61(h, v) \
166 	h[0] = (v[0] & 0xffff0000) ^ (v[0] << 16) ^ (v[0] >> 16) ^ (v[1] >> 16) ^ \
167 		(v[1] & 0xffff0000) ^ (v[2] << 16) ^ (v[3] >> 16) ^ (v[4] << 16) ^ \
168 		(v[5] >> 16) ^ v[5] ^ (v[6] >> 16) ^ (v[7] << 16) ^ (v[7] >> 16) ^ \
169 		(v[7] & 0xffff); \
170 	h[1] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^ (v[1] & 0xffff) ^ \
171 	v[2] ^ (v[2] >> 16) ^ (v[3] << 16) ^ (v[4] >> 16) ^ (v[5] << 16) ^ \
172 		(v[6] << 16) ^ v[6] ^ (v[7] & 0xffff0000) ^ (v[7] >> 16); \
173 	h[2] = (v[0] & 0xffff) ^ (v[0] << 16) ^ (v[1] << 16) ^ (v[1] >> 16) ^ \
174 		(v[1] & 0xffff0000) ^ (v[2] << 16) ^ (v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ \
175 		(v[5] >> 16) ^ v[6] ^ (v[6] >> 16) ^ (v[7] & 0xffff) ^ (v[7] << 16) ^ \
176 		(v[7] >> 16); \
177 	h[3] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^ \
178 		(v[1] & 0xffff0000) ^ (v[1] >> 16) ^ (v[2] << 16) ^ (v[2] >> 16) ^ v[2] ^ \
179 		(v[3] << 16) ^ (v[4] >> 16) ^ v[4] ^ (v[5] << 16) ^ (v[6] << 16) ^ \
180 		(v[7] & 0xffff) ^ (v[7] >> 16); \
181 	h[4] = (v[0] >> 16) ^ (v[1] << 16) ^ v[1] ^ (v[2] >> 16) ^ v[2] ^ \
182 		(v[3] << 16) ^ (v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ (v[5] >> 16) ^ \
183 	v[5] ^ (v[6] << 16) ^ (v[6] >> 16) ^ (v[7] << 16); \
184 	h[5] = (v[0] << 16) ^ (v[0] & 0xffff0000) ^ (v[1] << 16) ^ (v[1] >> 16) ^ \
185 		(v[1] & 0xffff0000) ^ (v[2] << 16) ^ v[2] ^ (v[3] >> 16) ^ v[3] ^ \
186 		(v[4] << 16) ^ (v[4] >> 16) ^ v[4] ^ (v[5] << 16) ^ (v[6] << 16) ^ \
187 		(v[6] >> 16) ^ v[6] ^ (v[7] << 16) ^ (v[7] >> 16) ^ (v[7] & 0xffff0000); \
188 	h[6] = v[0] ^ v[2] ^ (v[2] >> 16) ^ v[3] ^ (v[3] << 16) ^ v[4] ^ \
189 		(v[4] >> 16) ^ (v[5] << 16) ^ (v[5] >> 16) ^ v[5] ^ (v[6] << 16) ^ \
190 		(v[6] >> 16) ^ v[6] ^ (v[7] << 16) ^ v[7]; \
191 	h[7] = v[0] ^ (v[0] >> 16) ^ (v[1] << 16) ^ (v[1] >> 16) ^ (v[2] << 16) ^ \
192 		(v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ v[4] ^ (v[5] >> 16) ^ v[5] ^ \
193 		(v[6] << 16) ^ (v[6] >> 16) ^ (v[7] << 16) ^ v[7];
194 
195 #define PASS(tables) \
196 	X(w, u, v); \
197 	P(key, w); \
198 	R((tables), key, h, i, t, l, r); \
199 	S(s, l, r); \
200 	if (i != 6) { \
201 		A(u, l, r); \
202 		if (i == 2)	{ \
203 			C(u); \
204 		} \
205 		AA(v, l, r); \
206 	}
207 
Gost(PHP_GOST_CTX * context,uint32_t data[8])208 static inline void Gost(PHP_GOST_CTX *context, uint32_t data[8])
209 {
210 	int i;
211 	uint32_t l, r, t, key[8], u[8], v[8], w[8], s[8], *h = context->state, *m = data;
212 
213 	memcpy(u, context->state, sizeof(u));
214 	memcpy(v, data, sizeof(v));
215 
216 	for (i = 0; i < 8; i += 2) {
217 		PASS(*context->tables);
218 	}
219 	SHIFT12(u, m, s);
220 	SHIFT16(h, v, u);
221 	SHIFT61(h, v);
222 }
223 /* }}} */
224 
GostTransform(PHP_GOST_CTX * context,const unsigned char input[32])225 static inline void GostTransform(PHP_GOST_CTX *context, const unsigned char input[32])
226 {
227 	int i, j;
228 	uint32_t data[8], temp = 0;
229 
230 	for (i = 0, j = 0; i < 8; ++i, j += 4) {
231 		data[i] =	((uint32_t) input[j]) | (((uint32_t) input[j + 1]) << 8) |
232 					(((uint32_t) input[j + 2]) << 16) | (((uint32_t) input[j + 3]) << 24);
233 		context->state[i + 8] += data[i] + temp;
234 		temp = context->state[i + 8] < data[i] ? 1 : (context->state[i + 8] == data[i] ? temp : 0);
235 	}
236 
237 	Gost(context, data);
238 }
239 
PHP_GOSTInit(PHP_GOST_CTX * context)240 PHP_HASH_API void PHP_GOSTInit(PHP_GOST_CTX *context)
241 {
242 	memset(context, 0, sizeof(*context));
243 	context->tables = &tables_test;
244 }
245 
PHP_GOSTInitCrypto(PHP_GOST_CTX * context)246 PHP_HASH_API void PHP_GOSTInitCrypto(PHP_GOST_CTX *context)
247 {
248 	PHP_GOSTInit(context);
249 	context->tables = &tables_crypto;
250 }
251 
252 static const uint32_t MAX32 = 0xffffffffLU;
253 
PHP_GOSTUpdate(PHP_GOST_CTX * context,const unsigned char * input,size_t len)254 PHP_HASH_API void PHP_GOSTUpdate(PHP_GOST_CTX *context, const unsigned char *input, size_t len)
255 {
256 	if ((MAX32 - context->count[0]) < (len * 8)) {
257 		context->count[1]++;
258 		context->count[0] = MAX32 - context->count[0];
259 		context->count[0] = (len * 8) - context->count[0];
260 	} else {
261 		context->count[0] += len * 8;
262 	}
263 
264 	if (context->length + len < 32) {
265 		memcpy(&context->buffer[context->length], input, len);
266 		context->length += (unsigned char)len;
267 	} else {
268 		size_t i = 0, r = (context->length + len) % 32;
269 
270 		if (context->length) {
271 			i = 32 - context->length;
272 			memcpy(&context->buffer[context->length], input, i);
273 			GostTransform(context, context->buffer);
274 		}
275 
276 		for (; i + 32 <= len; i += 32) {
277 			GostTransform(context, input + i);
278 		}
279 
280 		memcpy(context->buffer, input + i, r);
281 		ZEND_SECURE_ZERO(&context->buffer[r], 32 - r);
282 		context->length = (unsigned char)r;
283 	}
284 }
285 
PHP_GOSTFinal(unsigned char digest[32],PHP_GOST_CTX * context)286 PHP_HASH_API void PHP_GOSTFinal(unsigned char digest[32], PHP_GOST_CTX *context)
287 {
288 	uint32_t i, j, l[8] = {0};
289 
290 	if (context->length) {
291 		GostTransform(context, context->buffer);
292 	}
293 
294 	memcpy(l, context->count, sizeof(context->count));
295 	Gost(context, l);
296 	memcpy(l, &context->state[8], sizeof(l));
297 	Gost(context, l);
298 
299 	for (i = 0, j = 0; j < 32; i++, j += 4) {
300 		digest[j] = (unsigned char) (context->state[i] & 0xff);
301 		digest[j + 1] = (unsigned char) ((context->state[i] >> 8) & 0xff);
302 		digest[j + 2] = (unsigned char) ((context->state[i] >> 16) & 0xff);
303 		digest[j + 3] = (unsigned char) ((context->state[i] >> 24) & 0xff);
304 	}
305 
306 	ZEND_SECURE_ZERO(context, sizeof(*context));
307 }
308 
309 const php_hash_ops php_hash_gost_ops = {
310 	(php_hash_init_func_t) PHP_GOSTInit,
311 	(php_hash_update_func_t) PHP_GOSTUpdate,
312 	(php_hash_final_func_t) PHP_GOSTFinal,
313 	(php_hash_copy_func_t) php_hash_copy,
314 	32,
315 	32,
316 	sizeof(PHP_GOST_CTX),
317 	1
318 };
319 
320 const php_hash_ops php_hash_gost_crypto_ops = {
321 	(php_hash_init_func_t) PHP_GOSTInitCrypto,
322 	(php_hash_update_func_t) PHP_GOSTUpdate,
323 	(php_hash_final_func_t) PHP_GOSTFinal,
324 	(php_hash_copy_func_t) php_hash_copy,
325 	32,
326 	32,
327 	sizeof(PHP_GOST_CTX),
328 	1
329 };
330 
331 /*
332  * Local variables:
333  * tab-width: 4
334  * c-basic-offset: 4
335  * End:
336  * vim600: sw=4 ts=4 fdm=marker
337  * vim<600: sw=4 ts=4
338  */
339