Annotation of embedaddon/php/ext/standard/md5.c, revision 1.1.1.2
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: | Author: Alexander Peslyak (Solar Designer) <solar at openwall.com> |
16: | Lachlan Roche |
17: | Alessandro Astarita <aleast@capri.it> |
18: +----------------------------------------------------------------------+
19: */
20:
1.1.1.2 ! misho 21: /* $Id$ */
1.1 misho 22:
23: #include "php.h"
24: #include "md5.h"
25:
26: PHPAPI void make_digest(char *md5str, const unsigned char *digest) /* {{{ */
27: {
28: make_digest_ex(md5str, digest, 16);
29: }
30: /* }}} */
31:
32: PHPAPI void make_digest_ex(char *md5str, const unsigned char *digest, int len) /* {{{ */
33: {
34: static const char hexits[17] = "0123456789abcdef";
35: int i;
36:
37: for (i = 0; i < len; i++) {
38: md5str[i * 2] = hexits[digest[i] >> 4];
39: md5str[(i * 2) + 1] = hexits[digest[i] & 0x0F];
40: }
41: md5str[len * 2] = '\0';
42: }
43: /* }}} */
44:
45: /* {{{ proto string md5(string str, [ bool raw_output])
46: Calculate the md5 hash of a string */
47: PHP_NAMED_FUNCTION(php_if_md5)
48: {
49: char *arg;
50: int arg_len;
51: zend_bool raw_output = 0;
52: char md5str[33];
53: PHP_MD5_CTX context;
54: unsigned char digest[16];
55:
56: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
57: return;
58: }
59:
60: md5str[0] = '\0';
61: PHP_MD5Init(&context);
62: PHP_MD5Update(&context, arg, arg_len);
63: PHP_MD5Final(digest, &context);
64: if (raw_output) {
65: RETURN_STRINGL(digest, 16, 1);
66: } else {
67: make_digest_ex(md5str, digest, 16);
68: RETVAL_STRING(md5str, 1);
69: }
70:
71: }
72: /* }}} */
73:
74: /* {{{ proto string md5_file(string filename [, bool raw_output])
75: Calculate the md5 hash of given filename */
76: PHP_NAMED_FUNCTION(php_if_md5_file)
77: {
78: char *arg;
79: int arg_len;
80: zend_bool raw_output = 0;
81: char md5str[33];
82: unsigned char buf[1024];
83: unsigned char digest[16];
84: PHP_MD5_CTX context;
85: int n;
86: php_stream *stream;
87:
1.1.1.2 ! misho 88: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "p|b", &arg, &arg_len, &raw_output) == FAILURE) {
1.1 misho 89: return;
90: }
91:
1.1.1.2 ! misho 92: stream = php_stream_open_wrapper(arg, "rb", REPORT_ERRORS, NULL);
1.1 misho 93: if (!stream) {
94: RETURN_FALSE;
95: }
96:
97: PHP_MD5Init(&context);
98:
99: while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
100: PHP_MD5Update(&context, buf, n);
101: }
102:
103: PHP_MD5Final(digest, &context);
104:
105: php_stream_close(stream);
106:
107: if (n<0) {
108: RETURN_FALSE;
109: }
110:
111: if (raw_output) {
112: RETURN_STRINGL(digest, 16, 1);
113: } else {
114: make_digest_ex(md5str, digest, 16);
115: RETVAL_STRING(md5str, 1);
116: }
117: }
118: /* }}} */
119:
120: /*
121: * This is an OpenSSL-compatible implementation of the RSA Data Security,
122: * Inc. MD5 Message-Digest Algorithm (RFC 1321).
123: *
124: * Written by Solar Designer <solar at openwall.com> in 2001, and placed
125: * in the public domain. There's absolutely no warranty.
126: *
127: * This differs from Colin Plumb's older public domain implementation in
128: * that no 32-bit integer data type is required, there's no compile-time
129: * endianness configuration, and the function prototypes match OpenSSL's.
130: * The primary goals are portability and ease of use.
131: *
132: * This implementation is meant to be fast, but not as fast as possible.
133: * Some known optimizations are not included to reduce source code size
134: * and avoid compile-time configuration.
135: */
136:
137: #include <string.h>
138:
139: /*
140: * The basic MD5 functions.
141: *
142: * F and G are optimized compared to their RFC 1321 definitions for
143: * architectures that lack an AND-NOT instruction, just like in Colin Plumb's
144: * implementation.
145: */
146: #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
147: #define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
148: #define H(x, y, z) ((x) ^ (y) ^ (z))
149: #define I(x, y, z) ((y) ^ ((x) | ~(z)))
150:
151: /*
152: * The MD5 transformation for all four rounds.
153: */
154: #define STEP(f, a, b, c, d, x, t, s) \
155: (a) += f((b), (c), (d)) + (x) + (t); \
156: (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
157: (a) += (b);
158:
159: /*
160: * SET reads 4 input bytes in little-endian byte order and stores them
161: * in a properly aligned word in host byte order.
162: *
163: * The check for little-endian architectures that tolerate unaligned
164: * memory accesses is just an optimization. Nothing will break if it
165: * doesn't work.
166: */
167: #if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
168: # define SET(n) \
169: (*(php_uint32 *)&ptr[(n) * 4])
170: # define GET(n) \
171: SET(n)
172: #else
173: # define SET(n) \
174: (ctx->block[(n)] = \
175: (php_uint32)ptr[(n) * 4] | \
176: ((php_uint32)ptr[(n) * 4 + 1] << 8) | \
177: ((php_uint32)ptr[(n) * 4 + 2] << 16) | \
178: ((php_uint32)ptr[(n) * 4 + 3] << 24))
179: # define GET(n) \
180: (ctx->block[(n)])
181: #endif
182:
183: /*
184: * This processes one or more 64-byte data blocks, but does NOT update
185: * the bit counters. There are no alignment requirements.
186: */
187: static const void *body(PHP_MD5_CTX *ctx, const void *data, size_t size)
188: {
189: const unsigned char *ptr;
190: php_uint32 a, b, c, d;
191: php_uint32 saved_a, saved_b, saved_c, saved_d;
192:
193: ptr = data;
194:
195: a = ctx->a;
196: b = ctx->b;
197: c = ctx->c;
198: d = ctx->d;
199:
200: do {
201: saved_a = a;
202: saved_b = b;
203: saved_c = c;
204: saved_d = d;
205:
206: /* Round 1 */
207: STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
208: STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
209: STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
210: STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
211: STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
212: STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
213: STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
214: STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
215: STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
216: STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
217: STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
218: STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
219: STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
220: STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
221: STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
222: STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
223:
224: /* Round 2 */
225: STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
226: STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
227: STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
228: STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
229: STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
230: STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
231: STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
232: STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
233: STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
234: STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
235: STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
236: STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
237: STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
238: STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
239: STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
240: STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
241:
242: /* Round 3 */
243: STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
244: STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
245: STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
246: STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
247: STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
248: STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
249: STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
250: STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
251: STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
252: STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
253: STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
254: STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
255: STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
256: STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
257: STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
258: STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)
259:
260: /* Round 4 */
261: STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
262: STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
263: STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
264: STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
265: STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
266: STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
267: STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
268: STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
269: STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
270: STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
271: STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
272: STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
273: STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
274: STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
275: STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
276: STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
277:
278: a += saved_a;
279: b += saved_b;
280: c += saved_c;
281: d += saved_d;
282:
283: ptr += 64;
284: } while (size -= 64);
285:
286: ctx->a = a;
287: ctx->b = b;
288: ctx->c = c;
289: ctx->d = d;
290:
291: return ptr;
292: }
293:
294: PHPAPI void PHP_MD5Init(PHP_MD5_CTX *ctx)
295: {
296: ctx->a = 0x67452301;
297: ctx->b = 0xefcdab89;
298: ctx->c = 0x98badcfe;
299: ctx->d = 0x10325476;
300:
301: ctx->lo = 0;
302: ctx->hi = 0;
303: }
304:
305: PHPAPI void PHP_MD5Update(PHP_MD5_CTX *ctx, const void *data, size_t size)
306: {
307: php_uint32 saved_lo;
308: php_uint32 used, free;
309:
310: saved_lo = ctx->lo;
311: if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo) {
312: ctx->hi++;
313: }
314: ctx->hi += size >> 29;
315:
316: used = saved_lo & 0x3f;
317:
318: if (used) {
319: free = 64 - used;
320:
321: if (size < free) {
322: memcpy(&ctx->buffer[used], data, size);
323: return;
324: }
325:
326: memcpy(&ctx->buffer[used], data, free);
327: data = (unsigned char *)data + free;
328: size -= free;
329: body(ctx, ctx->buffer, 64);
330: }
331:
332: if (size >= 64) {
333: data = body(ctx, data, size & ~(size_t)0x3f);
334: size &= 0x3f;
335: }
336:
337: memcpy(ctx->buffer, data, size);
338: }
339:
340: PHPAPI void PHP_MD5Final(unsigned char *result, PHP_MD5_CTX *ctx)
341: {
342: php_uint32 used, free;
343:
344: used = ctx->lo & 0x3f;
345:
346: ctx->buffer[used++] = 0x80;
347:
348: free = 64 - used;
349:
350: if (free < 8) {
351: memset(&ctx->buffer[used], 0, free);
352: body(ctx, ctx->buffer, 64);
353: used = 0;
354: free = 64;
355: }
356:
357: memset(&ctx->buffer[used], 0, free - 8);
358:
359: ctx->lo <<= 3;
360: ctx->buffer[56] = ctx->lo;
361: ctx->buffer[57] = ctx->lo >> 8;
362: ctx->buffer[58] = ctx->lo >> 16;
363: ctx->buffer[59] = ctx->lo >> 24;
364: ctx->buffer[60] = ctx->hi;
365: ctx->buffer[61] = ctx->hi >> 8;
366: ctx->buffer[62] = ctx->hi >> 16;
367: ctx->buffer[63] = ctx->hi >> 24;
368:
369: body(ctx, ctx->buffer, 64);
370:
371: result[0] = ctx->a;
372: result[1] = ctx->a >> 8;
373: result[2] = ctx->a >> 16;
374: result[3] = ctx->a >> 24;
375: result[4] = ctx->b;
376: result[5] = ctx->b >> 8;
377: result[6] = ctx->b >> 16;
378: result[7] = ctx->b >> 24;
379: result[8] = ctx->c;
380: result[9] = ctx->c >> 8;
381: result[10] = ctx->c >> 16;
382: result[11] = ctx->c >> 24;
383: result[12] = ctx->d;
384: result[13] = ctx->d >> 8;
385: result[14] = ctx->d >> 16;
386: result[15] = ctx->d >> 24;
387:
388: memset(ctx, 0, sizeof(*ctx));
389: }
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