Annotation of embedaddon/php/ext/standard/sha1.c, revision 1.1.1.1
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: Stefan Esser <sesser@php.net> |
16: +----------------------------------------------------------------------+
17: */
18:
19: /* $Id: sha1.c 321634 2012-01-01 13:15:04Z felipe $ */
20:
21: #include "php.h"
22:
23: /* This code is heavily based on the PHP md5 implementation */
24:
25: #include "sha1.h"
26: #include "md5.h"
27:
28: PHPAPI void make_sha1_digest(char *sha1str, unsigned char *digest)
29: {
30: make_digest_ex(sha1str, digest, 20);
31: }
32:
33: /* {{{ proto string sha1(string str [, bool raw_output])
34: Calculate the sha1 hash of a string */
35: PHP_FUNCTION(sha1)
36: {
37: char *arg;
38: int arg_len;
39: zend_bool raw_output = 0;
40: char sha1str[41];
41: PHP_SHA1_CTX context;
42: unsigned char digest[20];
43:
44: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
45: return;
46: }
47:
48: sha1str[0] = '\0';
49: PHP_SHA1Init(&context);
50: PHP_SHA1Update(&context, arg, arg_len);
51: PHP_SHA1Final(digest, &context);
52: if (raw_output) {
53: RETURN_STRINGL(digest, 20, 1);
54: } else {
55: make_digest_ex(sha1str, digest, 20);
56: RETVAL_STRING(sha1str, 1);
57: }
58:
59: }
60:
61: /* }}} */
62:
63:
64: /* {{{ proto string sha1_file(string filename [, bool raw_output])
65: Calculate the sha1 hash of given filename */
66: PHP_FUNCTION(sha1_file)
67: {
68: char *arg;
69: int arg_len;
70: zend_bool raw_output = 0;
71: char sha1str[41];
72: unsigned char buf[1024];
73: unsigned char digest[20];
74: PHP_SHA1_CTX context;
75: int n;
76: php_stream *stream;
77:
78: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
79: return;
80: }
81:
82: stream = php_stream_open_wrapper(arg, "rb", REPORT_ERRORS | ENFORCE_SAFE_MODE, NULL);
83: if (!stream) {
84: RETURN_FALSE;
85: }
86:
87: PHP_SHA1Init(&context);
88:
89: while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
90: PHP_SHA1Update(&context, buf, n);
91: }
92:
93: PHP_SHA1Final(digest, &context);
94:
95: php_stream_close(stream);
96:
97: if (n<0) {
98: RETURN_FALSE;
99: }
100:
101: if (raw_output) {
102: RETURN_STRINGL(digest, 20, 1);
103: } else {
104: make_digest_ex(sha1str, digest, 20);
105: RETVAL_STRING(sha1str, 1);
106: }
107: }
108: /* }}} */
109:
110:
111: static void SHA1Transform(php_uint32[5], const unsigned char[64]);
112: static void SHA1Encode(unsigned char *, php_uint32 *, unsigned int);
113: static void SHA1Decode(php_uint32 *, const unsigned char *, unsigned int);
114:
115: static unsigned char PADDING[64] =
116: {
117: 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
118: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
119: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
120: };
121:
122: /* F, G, H and I are basic SHA1 functions.
123: */
124: #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
125: #define G(x, y, z) ((x) ^ (y) ^ (z))
126: #define H(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
127: #define I(x, y, z) ((x) ^ (y) ^ (z))
128:
129: /* ROTATE_LEFT rotates x left n bits.
130: */
131: #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
132:
133: /* W[i]
134: */
135: #define W(i) ( tmp=x[(i-3)&15]^x[(i-8)&15]^x[(i-14)&15]^x[i&15], \
136: (x[i&15]=ROTATE_LEFT(tmp, 1)) )
137:
138: /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
139: */
140: #define FF(a, b, c, d, e, w) { \
141: (e) += F ((b), (c), (d)) + (w) + (php_uint32)(0x5A827999); \
142: (e) += ROTATE_LEFT ((a), 5); \
143: (b) = ROTATE_LEFT((b), 30); \
144: }
145: #define GG(a, b, c, d, e, w) { \
146: (e) += G ((b), (c), (d)) + (w) + (php_uint32)(0x6ED9EBA1); \
147: (e) += ROTATE_LEFT ((a), 5); \
148: (b) = ROTATE_LEFT((b), 30); \
149: }
150: #define HH(a, b, c, d, e, w) { \
151: (e) += H ((b), (c), (d)) + (w) + (php_uint32)(0x8F1BBCDC); \
152: (e) += ROTATE_LEFT ((a), 5); \
153: (b) = ROTATE_LEFT((b), 30); \
154: }
155: #define II(a, b, c, d, e, w) { \
156: (e) += I ((b), (c), (d)) + (w) + (php_uint32)(0xCA62C1D6); \
157: (e) += ROTATE_LEFT ((a), 5); \
158: (b) = ROTATE_LEFT((b), 30); \
159: }
160:
161:
162: /* {{{ PHP_SHA1Init
163: * SHA1 initialization. Begins an SHA1 operation, writing a new context.
164: */
165: PHPAPI void PHP_SHA1Init(PHP_SHA1_CTX * context)
166: {
167: context->count[0] = context->count[1] = 0;
168: /* Load magic initialization constants.
169: */
170: context->state[0] = 0x67452301;
171: context->state[1] = 0xefcdab89;
172: context->state[2] = 0x98badcfe;
173: context->state[3] = 0x10325476;
174: context->state[4] = 0xc3d2e1f0;
175: }
176: /* }}} */
177:
178: /* {{{ PHP_SHA1Update
179: SHA1 block update operation. Continues an SHA1 message-digest
180: operation, processing another message block, and updating the
181: context.
182: */
183: PHPAPI void PHP_SHA1Update(PHP_SHA1_CTX * context, const unsigned char *input,
184: unsigned int inputLen)
185: {
186: unsigned int i, index, partLen;
187:
188: /* Compute number of bytes mod 64 */
189: index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
190:
191: /* Update number of bits */
192: if ((context->count[0] += ((php_uint32) inputLen << 3))
193: < ((php_uint32) inputLen << 3))
194: context->count[1]++;
195: context->count[1] += ((php_uint32) inputLen >> 29);
196:
197: partLen = 64 - index;
198:
199: /* Transform as many times as possible.
200: */
201: if (inputLen >= partLen) {
202: memcpy
203: ((unsigned char*) & context->buffer[index], (unsigned char*) input, partLen);
204: SHA1Transform(context->state, context->buffer);
205:
206: for (i = partLen; i + 63 < inputLen; i += 64)
207: SHA1Transform(context->state, &input[i]);
208:
209: index = 0;
210: } else
211: i = 0;
212:
213: /* Buffer remaining input */
214: memcpy
215: ((unsigned char*) & context->buffer[index], (unsigned char*) & input[i],
216: inputLen - i);
217: }
218: /* }}} */
219:
220: /* {{{ PHP_SHA1Final
221: SHA1 finalization. Ends an SHA1 message-digest operation, writing the
222: the message digest and zeroizing the context.
223: */
224: PHPAPI void PHP_SHA1Final(unsigned char digest[20], PHP_SHA1_CTX * context)
225: {
226: unsigned char bits[8];
227: unsigned int index, padLen;
228:
229: /* Save number of bits */
230: bits[7] = context->count[0] & 0xFF;
231: bits[6] = (context->count[0] >> 8) & 0xFF;
232: bits[5] = (context->count[0] >> 16) & 0xFF;
233: bits[4] = (context->count[0] >> 24) & 0xFF;
234: bits[3] = context->count[1] & 0xFF;
235: bits[2] = (context->count[1] >> 8) & 0xFF;
236: bits[1] = (context->count[1] >> 16) & 0xFF;
237: bits[0] = (context->count[1] >> 24) & 0xFF;
238:
239: /* Pad out to 56 mod 64.
240: */
241: index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
242: padLen = (index < 56) ? (56 - index) : (120 - index);
243: PHP_SHA1Update(context, PADDING, padLen);
244:
245: /* Append length (before padding) */
246: PHP_SHA1Update(context, bits, 8);
247:
248: /* Store state in digest */
249: SHA1Encode(digest, context->state, 20);
250:
251: /* Zeroize sensitive information.
252: */
253: memset((unsigned char*) context, 0, sizeof(*context));
254: }
255: /* }}} */
256:
257: /* {{{ SHA1Transform
258: * SHA1 basic transformation. Transforms state based on block.
259: */
260: static void SHA1Transform(state, block)
261: php_uint32 state[5];
262: const unsigned char block[64];
263: {
264: php_uint32 a = state[0], b = state[1], c = state[2];
265: php_uint32 d = state[3], e = state[4], x[16], tmp;
266:
267: SHA1Decode(x, block, 64);
268:
269: /* Round 1 */
270: FF(a, b, c, d, e, x[0]); /* 1 */
271: FF(e, a, b, c, d, x[1]); /* 2 */
272: FF(d, e, a, b, c, x[2]); /* 3 */
273: FF(c, d, e, a, b, x[3]); /* 4 */
274: FF(b, c, d, e, a, x[4]); /* 5 */
275: FF(a, b, c, d, e, x[5]); /* 6 */
276: FF(e, a, b, c, d, x[6]); /* 7 */
277: FF(d, e, a, b, c, x[7]); /* 8 */
278: FF(c, d, e, a, b, x[8]); /* 9 */
279: FF(b, c, d, e, a, x[9]); /* 10 */
280: FF(a, b, c, d, e, x[10]); /* 11 */
281: FF(e, a, b, c, d, x[11]); /* 12 */
282: FF(d, e, a, b, c, x[12]); /* 13 */
283: FF(c, d, e, a, b, x[13]); /* 14 */
284: FF(b, c, d, e, a, x[14]); /* 15 */
285: FF(a, b, c, d, e, x[15]); /* 16 */
286: FF(e, a, b, c, d, W(16)); /* 17 */
287: FF(d, e, a, b, c, W(17)); /* 18 */
288: FF(c, d, e, a, b, W(18)); /* 19 */
289: FF(b, c, d, e, a, W(19)); /* 20 */
290:
291: /* Round 2 */
292: GG(a, b, c, d, e, W(20)); /* 21 */
293: GG(e, a, b, c, d, W(21)); /* 22 */
294: GG(d, e, a, b, c, W(22)); /* 23 */
295: GG(c, d, e, a, b, W(23)); /* 24 */
296: GG(b, c, d, e, a, W(24)); /* 25 */
297: GG(a, b, c, d, e, W(25)); /* 26 */
298: GG(e, a, b, c, d, W(26)); /* 27 */
299: GG(d, e, a, b, c, W(27)); /* 28 */
300: GG(c, d, e, a, b, W(28)); /* 29 */
301: GG(b, c, d, e, a, W(29)); /* 30 */
302: GG(a, b, c, d, e, W(30)); /* 31 */
303: GG(e, a, b, c, d, W(31)); /* 32 */
304: GG(d, e, a, b, c, W(32)); /* 33 */
305: GG(c, d, e, a, b, W(33)); /* 34 */
306: GG(b, c, d, e, a, W(34)); /* 35 */
307: GG(a, b, c, d, e, W(35)); /* 36 */
308: GG(e, a, b, c, d, W(36)); /* 37 */
309: GG(d, e, a, b, c, W(37)); /* 38 */
310: GG(c, d, e, a, b, W(38)); /* 39 */
311: GG(b, c, d, e, a, W(39)); /* 40 */
312:
313: /* Round 3 */
314: HH(a, b, c, d, e, W(40)); /* 41 */
315: HH(e, a, b, c, d, W(41)); /* 42 */
316: HH(d, e, a, b, c, W(42)); /* 43 */
317: HH(c, d, e, a, b, W(43)); /* 44 */
318: HH(b, c, d, e, a, W(44)); /* 45 */
319: HH(a, b, c, d, e, W(45)); /* 46 */
320: HH(e, a, b, c, d, W(46)); /* 47 */
321: HH(d, e, a, b, c, W(47)); /* 48 */
322: HH(c, d, e, a, b, W(48)); /* 49 */
323: HH(b, c, d, e, a, W(49)); /* 50 */
324: HH(a, b, c, d, e, W(50)); /* 51 */
325: HH(e, a, b, c, d, W(51)); /* 52 */
326: HH(d, e, a, b, c, W(52)); /* 53 */
327: HH(c, d, e, a, b, W(53)); /* 54 */
328: HH(b, c, d, e, a, W(54)); /* 55 */
329: HH(a, b, c, d, e, W(55)); /* 56 */
330: HH(e, a, b, c, d, W(56)); /* 57 */
331: HH(d, e, a, b, c, W(57)); /* 58 */
332: HH(c, d, e, a, b, W(58)); /* 59 */
333: HH(b, c, d, e, a, W(59)); /* 60 */
334:
335: /* Round 4 */
336: II(a, b, c, d, e, W(60)); /* 61 */
337: II(e, a, b, c, d, W(61)); /* 62 */
338: II(d, e, a, b, c, W(62)); /* 63 */
339: II(c, d, e, a, b, W(63)); /* 64 */
340: II(b, c, d, e, a, W(64)); /* 65 */
341: II(a, b, c, d, e, W(65)); /* 66 */
342: II(e, a, b, c, d, W(66)); /* 67 */
343: II(d, e, a, b, c, W(67)); /* 68 */
344: II(c, d, e, a, b, W(68)); /* 69 */
345: II(b, c, d, e, a, W(69)); /* 70 */
346: II(a, b, c, d, e, W(70)); /* 71 */
347: II(e, a, b, c, d, W(71)); /* 72 */
348: II(d, e, a, b, c, W(72)); /* 73 */
349: II(c, d, e, a, b, W(73)); /* 74 */
350: II(b, c, d, e, a, W(74)); /* 75 */
351: II(a, b, c, d, e, W(75)); /* 76 */
352: II(e, a, b, c, d, W(76)); /* 77 */
353: II(d, e, a, b, c, W(77)); /* 78 */
354: II(c, d, e, a, b, W(78)); /* 79 */
355: II(b, c, d, e, a, W(79)); /* 80 */
356:
357: state[0] += a;
358: state[1] += b;
359: state[2] += c;
360: state[3] += d;
361: state[4] += e;
362:
363: /* Zeroize sensitive information. */
364: memset((unsigned char*) x, 0, sizeof(x));
365: }
366: /* }}} */
367:
368: /* {{{ SHA1Encode
369: Encodes input (php_uint32) into output (unsigned char). Assumes len is
370: a multiple of 4.
371: */
372: static void SHA1Encode(output, input, len)
373: unsigned char *output;
374: php_uint32 *input;
375: unsigned int len;
376: {
377: unsigned int i, j;
378:
379: for (i = 0, j = 0; j < len; i++, j += 4) {
380: output[j] = (unsigned char) ((input[i] >> 24) & 0xff);
381: output[j + 1] = (unsigned char) ((input[i] >> 16) & 0xff);
382: output[j + 2] = (unsigned char) ((input[i] >> 8) & 0xff);
383: output[j + 3] = (unsigned char) (input[i] & 0xff);
384: }
385: }
386: /* }}} */
387:
388: /* {{{ SHA1Decode
389: Decodes input (unsigned char) into output (php_uint32). Assumes len is
390: a multiple of 4.
391: */
392: static void SHA1Decode(output, input, len)
393: php_uint32 *output;
394: const unsigned char *input;
395: unsigned int len;
396: {
397: unsigned int i, j;
398:
399: for (i = 0, j = 0; j < len; i++, j += 4)
400: output[i] = ((php_uint32) input[j + 3]) | (((php_uint32) input[j + 2]) << 8) |
401: (((php_uint32) input[j + 1]) << 16) | (((php_uint32) input[j]) << 24);
402: }
403: /* }}} */
404:
405: /*
406: * Local variables:
407: * tab-width: 4
408: * c-basic-offset: 4
409: * End:
410: * vim600: sw=4 ts=4 fdm=marker
411: * vim<600: sw=4 ts=4
412: */
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