forked from sektioneins/suhosin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
sha256.c
434 lines (366 loc) · 13 KB
/
sha256.c
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
/*
+----------------------------------------------------------------------+
| Suhosin Version 1 |
+----------------------------------------------------------------------+
| Copyright (c) 2006-2007 The Hardened-PHP Project |
| Copyright (c) 2007-2014 SektionEins GmbH |
+----------------------------------------------------------------------+
| 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Stefan Esser <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id: sha256.c,v 1.1.1.1 2007-11-28 01:15:35 sesser Exp $ */
#include <stdio.h>
#include "php.h"
/* This code is heavily based on the PHP md5/sha1 implementations */
#include "sha256.h"
static void make_sha256_digest(char *sha256str, unsigned char *digest)
{
int i;
for (i = 0; i < 32; i++) {
sprintf(sha256str, "%02x", digest[i]);
sha256str += 2;
}
*sha256str = '\0';
}
/* {{{ proto string sha256(string str [, bool raw_output])
Calculate the sha256 hash of a string */
static PHP_FUNCTION(suhosin_sha256)
{
char *arg;
int arg_len;
zend_bool raw_output = 0;
char sha256str[65];
suhosin_SHA256_CTX context;
unsigned char digest[32];
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
return;
}
sha256str[0] = '\0';
suhosin_SHA256Init(&context);
suhosin_SHA256Update(&context, (unsigned char *)arg, (unsigned int)arg_len);
suhosin_SHA256Final(digest, &context);
if (raw_output) {
RETURN_STRINGL((char *)digest, 32, 1);
} else {
make_sha256_digest(sha256str, digest);
RETVAL_STRING(sha256str, 1);
}
}
/* }}} */
/* {{{ proto string sha256_file(string filename [, bool raw_output])
Calculate the sha256 hash of given filename */
static PHP_FUNCTION(suhosin_sha256_file)
{
char *arg;
int arg_len;
zend_bool raw_output = 0;
char sha256str[65];
unsigned char buf[1024];
unsigned char digest[32];
suhosin_SHA256_CTX context;
int n;
FILE *fp;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
return;
}
#if PHP_VERSION_ID < 50400
if (PG(safe_mode) && (!php_checkuid(arg, NULL, CHECKUID_CHECK_FILE_AND_DIR))) {
RETURN_FALSE;
}
#endif
if (php_check_open_basedir(arg TSRMLS_CC)) {
RETURN_FALSE;
}
if ((fp = VCWD_FOPEN(arg, "rb")) == NULL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to open file");
RETURN_FALSE;
}
suhosin_SHA256Init(&context);
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
suhosin_SHA256Update(&context, buf, n);
}
suhosin_SHA256Final(digest, &context);
if (ferror(fp)) {
fclose(fp);
RETURN_FALSE;
}
fclose(fp);
if (raw_output) {
RETURN_STRINGL((char *)digest, 32, 1);
} else {
make_sha256_digest(sha256str, digest);
RETVAL_STRING(sha256str, 1);
}
}
/* }}} */
static void SHA256Transform(php_uint32[8], const unsigned char[64]);
static void SHA256Encode(unsigned char *, php_uint32 *, unsigned int);
static void SHA256Decode(php_uint32 *, const unsigned char *, unsigned int);
static unsigned char PADDING[64] =
{
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/* F, G, H and I are basic SHA256 functions.
*/
#define F(x) (ROTATE_RIGHT(x,2) ^ ROTATE_RIGHT(x,13) ^ ROTATE_RIGHT(x,22))
#define G(x, y, z) (((x) & (y)) | ((z) & ((y) | (x))))
#define H(x) (ROTATE_RIGHT(x,6) ^ ROTATE_RIGHT(x,11) ^ ROTATE_RIGHT(x,25))
#define I(x, y, z) (((x) & (y)) | ((~x) & z))
/* ROTATE_RIGHT rotates x right n bits.
*/
#define ROTATE_RIGHT(x, n) (((x) >> (n)) | ((x) << (32-(n))))
/* W[i]
*/
#define W(i) ( tmp1=ROTATE_RIGHT(x[(i-15)&15],7)^ROTATE_RIGHT(x[(i-15)&15],18)^(x[(i-15)&15] >> 3), \
tmp2=ROTATE_RIGHT(x[(i-2)&15],17)^ROTATE_RIGHT(x[(i-2)&15],19)^(x[(i-2)&15] >> 10), \
(x[i&15]=x[i&15] + tmp1 + x[(i-7)&15] + tmp2) )
/* ROUND function of sha256
*/
#define ROUND(a,b,c,d,e,f,g,h,w,k) { \
t1 = (h) + H((e)) + I((e), (f), (g)) + (k) + (php_uint32)(w); \
(h) = F((a)) + G((a), (b), (c)) + t1; \
(d) += t1; \
}
/* {{{ suhosin_SHA256Init
* SHA256 initialization. Begins an SHA256 operation, writing a new context.
*/
void suhosin_SHA256Init(suhosin_SHA256_CTX * context)
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
context->state[0] = 0x6a09e667;
context->state[1] = 0xbb67ae85;
context->state[2] = 0x3c6ef372;
context->state[3] = 0xa54ff53a;
context->state[4] = 0x510e527f;
context->state[5] = 0x9b05688c;
context->state[6] = 0x1f83d9ab;
context->state[7] = 0x5be0cd19;
}
/* }}} */
/* {{{ suhosin_SHA256Update
SHA256 block update operation. Continues an SHA256 message-digest
operation, processing another message block, and updating the
context.
*/
void suhosin_SHA256Update(suhosin_SHA256_CTX * context, const unsigned char *input,
unsigned int inputLen)
{
unsigned int i, index, partLen;
/* Compute number of bytes mod 64 */
index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
/* Update number of bits */
if ((context->count[0] += ((php_uint32) inputLen << 3))
< ((php_uint32) inputLen << 3))
context->count[1]++;
context->count[1] += ((php_uint32) inputLen >> 29);
partLen = 64 - index;
/* Transform as many times as possible.
*/
if (inputLen >= partLen) {
memcpy
((unsigned char*) & context->buffer[index], (unsigned char*) input, partLen);
SHA256Transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
SHA256Transform(context->state, &input[i]);
index = 0;
} else
i = 0;
/* Buffer remaining input */
memcpy
((unsigned char*) & context->buffer[index], (unsigned char*) & input[i],
inputLen - i);
}
/* }}} */
/* {{{ suhosin_SHA256Final
SHA256 finalization. Ends an SHA256 message-digest operation, writing the
the message digest and zeroizing the context.
*/
void suhosin_SHA256Final(unsigned char digest[32], suhosin_SHA256_CTX * context)
{
unsigned char bits[8];
unsigned int index, padLen;
/* Save number of bits */
bits[7] = context->count[0] & 0xFF;
bits[6] = (context->count[0] >> 8) & 0xFF;
bits[5] = (context->count[0] >> 16) & 0xFF;
bits[4] = (context->count[0] >> 24) & 0xFF;
bits[3] = context->count[1] & 0xFF;
bits[2] = (context->count[1] >> 8) & 0xFF;
bits[1] = (context->count[1] >> 16) & 0xFF;
bits[0] = (context->count[1] >> 24) & 0xFF;
/* Pad out to 56 mod 64.
*/
index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
suhosin_SHA256Update(context, PADDING, padLen);
/* Append length (before padding) */
suhosin_SHA256Update(context, bits, 8);
/* Store state in digest */
SHA256Encode(digest, context->state, 32);
/* Zeroize sensitive information.
*/
memset((unsigned char*) context, 0, sizeof(*context));
}
/* }}} */
/* {{{ SHA256Transform
* SHA256 basic transformation. Transforms state based on block.
*/
static void SHA256Transform(state, block)
php_uint32 state[8];
const unsigned char block[64];
{
php_uint32 a = state[0], b = state[1], c = state[2];
php_uint32 d = state[3], e = state[4], f = state[5];
php_uint32 g = state[6], h = state[7], x[16], tmp1, tmp2, t1;
SHA256Decode(x, block, 64);
ROUND(a, b, c, d, e, f, g, h, x[0], 0x428a2f98)
ROUND(h, a, b, c, d, e, f, g, x[1], 0x71374491)
ROUND(g, h, a, b, c, d, e, f, x[2], 0xb5c0fbcf)
ROUND(f, g, h, a, b, c, d, e, x[3], 0xe9b5dba5)
ROUND(e, f, g, h, a, b, c, d, x[4], 0x3956c25b)
ROUND(d, e, f, g, h, a, b, c, x[5], 0x59f111f1)
ROUND(c, d, e, f, g, h, a, b, x[6], 0x923f82a4)
ROUND(b, c, d, e, f, g, h, a, x[7], 0xab1c5ed5)
ROUND(a, b, c, d, e, f, g, h, x[8], 0xd807aa98)
ROUND(h, a, b, c, d, e, f, g, x[9], 0x12835b01)
ROUND(g, h, a, b, c, d, e, f, x[10], 0x243185be)
ROUND(f, g, h, a, b, c, d, e, x[11], 0x550c7dc3)
ROUND(e, f, g, h, a, b, c, d, x[12], 0x72be5d74)
ROUND(d, e, f, g, h, a, b, c, x[13], 0x80deb1fe)
ROUND(c, d, e, f, g, h, a, b, x[14], 0x9bdc06a7)
ROUND(b, c, d, e, f, g, h, a, x[15], 0xc19bf174)
ROUND(a, b, c, d, e, f, g, h, W(16), 0xe49b69c1)
ROUND(h, a, b, c, d, e, f, g, W(17), 0xefbe4786)
ROUND(g, h, a, b, c, d, e, f, W(18), 0x0fc19dc6)
ROUND(f, g, h, a, b, c, d, e, W(19), 0x240ca1cc)
ROUND(e, f, g, h, a, b, c, d, W(20), 0x2de92c6f)
ROUND(d, e, f, g, h, a, b, c, W(21), 0x4a7484aa)
ROUND(c, d, e, f, g, h, a, b, W(22), 0x5cb0a9dc)
ROUND(b, c, d, e, f, g, h, a, W(23), 0x76f988da)
ROUND(a, b, c, d, e, f, g, h, W(24), 0x983e5152)
ROUND(h, a, b, c, d, e, f, g, W(25), 0xa831c66d)
ROUND(g, h, a, b, c, d, e, f, W(26), 0xb00327c8)
ROUND(f, g, h, a, b, c, d, e, W(27), 0xbf597fc7)
ROUND(e, f, g, h, a, b, c, d, W(28), 0xc6e00bf3)
ROUND(d, e, f, g, h, a, b, c, W(29), 0xd5a79147)
ROUND(c, d, e, f, g, h, a, b, W(30), 0x06ca6351)
ROUND(b, c, d, e, f, g, h, a, W(31), 0x14292967)
ROUND(a, b, c, d, e, f, g, h, W(32), 0x27b70a85)
ROUND(h, a, b, c, d, e, f, g, W(33), 0x2e1b2138)
ROUND(g, h, a, b, c, d, e, f, W(34), 0x4d2c6dfc)
ROUND(f, g, h, a, b, c, d, e, W(35), 0x53380d13)
ROUND(e, f, g, h, a, b, c, d, W(36), 0x650a7354)
ROUND(d, e, f, g, h, a, b, c, W(37), 0x766a0abb)
ROUND(c, d, e, f, g, h, a, b, W(38), 0x81c2c92e)
ROUND(b, c, d, e, f, g, h, a, W(39), 0x92722c85)
ROUND(a, b, c, d, e, f, g, h, W(40), 0xa2bfe8a1)
ROUND(h, a, b, c, d, e, f, g, W(41), 0xa81a664b)
ROUND(g, h, a, b, c, d, e, f, W(42), 0xc24b8b70)
ROUND(f, g, h, a, b, c, d, e, W(43), 0xc76c51a3)
ROUND(e, f, g, h, a, b, c, d, W(44), 0xd192e819)
ROUND(d, e, f, g, h, a, b, c, W(45), 0xd6990624)
ROUND(c, d, e, f, g, h, a, b, W(46), 0xf40e3585)
ROUND(b, c, d, e, f, g, h, a, W(47), 0x106aa070)
ROUND(a, b, c, d, e, f, g, h, W(48), 0x19a4c116)
ROUND(h, a, b, c, d, e, f, g, W(49), 0x1e376c08)
ROUND(g, h, a, b, c, d, e, f, W(50), 0x2748774c)
ROUND(f, g, h, a, b, c, d, e, W(51), 0x34b0bcb5)
ROUND(e, f, g, h, a, b, c, d, W(52), 0x391c0cb3)
ROUND(d, e, f, g, h, a, b, c, W(53), 0x4ed8aa4a)
ROUND(c, d, e, f, g, h, a, b, W(54), 0x5b9cca4f)
ROUND(b, c, d, e, f, g, h, a, W(55), 0x682e6ff3)
ROUND(a, b, c, d, e, f, g, h, W(56), 0x748f82ee)
ROUND(h, a, b, c, d, e, f, g, W(57), 0x78a5636f)
ROUND(g, h, a, b, c, d, e, f, W(58), 0x84c87814)
ROUND(f, g, h, a, b, c, d, e, W(59), 0x8cc70208)
ROUND(e, f, g, h, a, b, c, d, W(60), 0x90befffa)
ROUND(d, e, f, g, h, a, b, c, W(61), 0xa4506ceb)
ROUND(c, d, e, f, g, h, a, b, W(62), 0xbef9a3f7)
ROUND(b, c, d, e, f, g, h, a, W(63), 0xc67178f2)
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
state[5] += f;
state[6] += g;
state[7] += h;
/* Zeroize sensitive information. */
memset((unsigned char*) x, 0, sizeof(x));
}
/* }}} */
/* {{{ SHA256Encode
Encodes input (php_uint32) into output (unsigned char). Assumes len is
a multiple of 4.
*/
static void SHA256Encode(output, input, len)
unsigned char *output;
php_uint32 *input;
unsigned int len;
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (unsigned char) ((input[i] >> 24) & 0xff);
output[j + 1] = (unsigned char) ((input[i] >> 16) & 0xff);
output[j + 2] = (unsigned char) ((input[i] >> 8) & 0xff);
output[j + 3] = (unsigned char) (input[i] & 0xff);
}
}
/* }}} */
/* {{{ SHA256Decode
Decodes input (unsigned char) into output (php_uint32). Assumes len is
a multiple of 4.
*/
static void SHA256Decode(output, input, len)
php_uint32 *output;
const unsigned char *input;
unsigned int len;
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output[i] = ((php_uint32) input[j + 3]) | (((php_uint32) input[j + 2]) << 8) |
(((php_uint32) input[j + 1]) << 16) | (((php_uint32) input[j]) << 24);
}
/* }}} */
/* {{{ suhosin_sha256_functions[]
*/
static zend_function_entry suhosin_sha256_functions[] = {
PHP_NAMED_FE(sha256, PHP_FN(suhosin_sha256), NULL)
PHP_NAMED_FE(sha256_file, PHP_FN(suhosin_sha256_file), NULL)
{NULL, NULL, NULL}
};
/* }}} */
void suhosin_hook_sha256()
{
TSRMLS_FETCH();
/* check if we already have sha256 support */
if (zend_hash_exists(CG(function_table), "sha256", sizeof("sha256"))) {
return;
}
/* add the sha256 functions */
#ifndef ZEND_ENGINE_2
zend_register_functions(suhosin_sha256_functions, NULL, MODULE_PERSISTENT TSRMLS_CC);
#else
zend_register_functions(NULL, suhosin_sha256_functions, NULL, MODULE_PERSISTENT TSRMLS_CC);
#endif
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/