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php-src/ext/standard/md5.c
Andi Gutmans dbeb4158d2 - A belated happy holidays and PHP 5
2004-01-08 08:18:22 +00:00

447 lines
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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_0.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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Lachlan Roche |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* md5.c - Copyright 1997 Lachlan Roche
* md5_file() added by Alessandro Astarita <aleast@capri.it>
*/
#include <stdio.h>
#include "php.h"
#include "md5.h"
PHPAPI void make_digest(char *md5str, unsigned char *digest)
{
int i;
for (i = 0; i < 16; i++) {
sprintf(md5str, "%02x", digest[i]);
md5str += 2;
}
*md5str = '\0';
}
/* {{{ proto string md5(string str, [ bool raw_output])
Calculate the md5 hash of a string */
PHP_NAMED_FUNCTION(php_if_md5)
{
char *arg;
int arg_len;
zend_bool raw_output = 0;
char md5str[33];
PHP_MD5_CTX context;
unsigned char digest[16];
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
return;
}
md5str[0] = '\0';
PHP_MD5Init(&context);
PHP_MD5Update(&context, arg, arg_len);
PHP_MD5Final(digest, &context);
if (raw_output) {
RETURN_STRINGL(digest, 16, 1);
} else {
make_digest(md5str, digest);
RETVAL_STRING(md5str, 1);
}
}
/* }}} */
/* {{{ proto string md5_file(string filename [, bool raw_output])
Calculate the md5 hash of given filename */
PHP_NAMED_FUNCTION(php_if_md5_file)
{
char *arg;
int arg_len;
zend_bool raw_output = 0;
char md5str[33];
unsigned char buf[1024];
unsigned char digest[16];
PHP_MD5_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 (PG(safe_mode) && (!php_checkuid(arg, NULL, CHECKUID_CHECK_FILE_AND_DIR))) {
RETURN_FALSE;
}
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;
}
PHP_MD5Init(&context);
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
PHP_MD5Update(&context, buf, n);
}
PHP_MD5Final(digest, &context);
if (ferror(fp)) {
fclose(fp);
RETURN_FALSE;
}
fclose(fp);
if (raw_output) {
RETURN_STRINGL(digest, 16, 1);
} else {
make_digest(md5str, digest);
RETVAL_STRING(md5str, 1);
}
}
/* }}} */
/*
* The remaining code is the reference MD5 code (md5c.c) from rfc1321
*/
/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
*/
/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
rights reserved.
License to copy and use this software is granted provided that it
is identified as the "RSA Data Security, Inc. MD5 Message-Digest
Algorithm" in all material mentioning or referencing this software
or this function.
License is also granted to make and use derivative works provided
that such works are identified as "derived from the RSA Data
Security, Inc. MD5 Message-Digest Algorithm" in all material
mentioning or referencing the derived work.
RSA Data Security, Inc. makes no representations concerning either
the merchantability of this software or the suitability of this
software for any particular purpose. It is provided "as is"
without express or implied warranty of any kind.
These notices must be retained in any copies of any part of this
documentation and/or software.
*/
/* Constants for MD5Transform routine.
*/
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
static void MD5Transform(php_uint32[4], const unsigned char[64]);
static void Encode(unsigned char *, php_uint32 *, unsigned int);
static void Decode(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 MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (php_uint32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (php_uint32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (php_uint32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (php_uint32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/* {{{ PHP_MD5Init
* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
PHPAPI void PHP_MD5Init(PHP_MD5_CTX * context)
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
/* }}} */
/* {{{ PHP_MD5Update
MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
PHPAPI void PHP_MD5Update(PHP_MD5_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);
MD5Transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform(context->state, &input[i]);
index = 0;
} else
i = 0;
/* Buffer remaining input */
memcpy
((unsigned char*) & context->buffer[index], (unsigned char*) & input[i],
inputLen - i);
}
/* }}} */
/* {{{ PHP_MD5Final
MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
*/
PHPAPI void PHP_MD5Final(unsigned char digest[16], PHP_MD5_CTX * context)
{
unsigned char bits[8];
unsigned int index, padLen;
/* Save number of bits */
Encode(bits, context->count, 8);
/* Pad out to 56 mod 64.
*/
index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
PHP_MD5Update(context, PADDING, padLen);
/* Append length (before padding) */
PHP_MD5Update(context, bits, 8);
/* Store state in digest */
Encode(digest, context->state, 16);
/* Zeroize sensitive information.
*/
memset((unsigned char*) context, 0, sizeof(*context));
}
/* }}} */
/* {{{ MD5Transform
* MD5 basic transformation. Transforms state based on block.
*/
static void MD5Transform(state, block)
php_uint32 state[4];
const unsigned char block[64];
{
php_uint32 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
Decode(x, block, 64);
/* Round 1 */
FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
/* Round 2 */
GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
/* Zeroize sensitive information. */
memset((unsigned char*) x, 0, sizeof(x));
}
/* }}} */
/* {{{ Encode
Encodes input (php_uint32) into output (unsigned char). Assumes len is
a multiple of 4.
*/
static void Encode(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] & 0xff);
output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff);
output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff);
output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff);
}
}
/* }}} */
/* {{{ Decode
Decodes input (unsigned char) into output (php_uint32). Assumes len is
a multiple of 4.
*/
static void Decode(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]) | (((php_uint32) input[j + 1]) << 8) |
(((php_uint32) input[j + 2]) << 16) | (((php_uint32) input[j + 3]) << 24);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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