Annotation of embedaddon/php/ext/standard/sha1.c, revision 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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