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Date: Thu, 07 Feb 2008 13:11:38 +0300
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To: Solar Designer <solar@openwall.com>, 
 Sara Golemon <saramg_76@yahoo.com>
CC: Stanislav Malyshev <stas@zend.com>, Andi Gutmans <andi@zend.com>, 
 PHP Internals List <internals@lists.php.net>
References: <20071209010552.GA12561@openwall.com> <47A849D0.8050508@zend.com> <20080205235055.GA19309@openwall.com>
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 boundary="------------020309080801090609010402"
Subject: Re: [PHP-DEV] faster & public domain MD5 implementation
From: dmitry@zend.com (Dmitry Stogov)

--------------020309080801090609010402
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Hi Alexander,

I've updated the files according to your notes, except 
php_uint32/MD5_u32plus.

However new version breaks ext/hash md4. (ext/hash/tests/md4.phpt is 
broken).

Sara, did you have a solution for this issue?
Or could you look into it please?

Thanks. Dmitry.

Solar Designer wrote:
> Hi Dmitry and all,
> 
> First of all, please accept my apologies for failing to find the time to
> participate in the licensing issues discussion in December.  It is a
> topic that I would like to discuss and arrive at a conclusion as I often
> happen to write code that I'd like to release to the public under the most
> relaxed terms possible.  I thought that not claiming copyright (or even
> disclaiming copyright) and placing the code into the public domain would
> be it, but apparently in many (most? all?) jurisdictions there's no
> explicitly specified way for someone to place their works into the
> public domain (although the concept of public domain does exist - and
> stuff "falls" there as old copyrights expire) and now it has also been
> mentioned that some jurisdictions don't even recognize public domain at
> all (I have not yet seen/heard a lawyer state that, though).
> 
> A possible solution could be to simultaneously try to place stuff in the
> public domain with a statement to that extent and license it to the
> public under very liberal terms.  One issue with it is that I have to
> not claim or disclaim copyright in order to place a work of mine into
> the public domain, yet I have to be the copyright holder in order to
> license that work.  Maybe this can be taken care of with a severability
> clause, making either the public domain or the license work in any given
> jurisdiction.  But I'd rather see/hear a lawyer comment on that before I
> possibly go that route.
> 
> That said, a lot of software that we use has been placed in the public
> domain by its authors.  This includes some software by D. J. Bernstein,
> perhaps best known as the author of qmail, who is also known for the
> Bernstein vs. United States litigation - http://cr.yp.to/export.html -
> so perhaps he should know the law.  Then, public domain is officially
> recognized as being compatible with GNU GPL by the FSF -
> http://www.fsf.org/licensing/licenses/ - and is apparently recognized by
> the OSI - http://opensource.org/node/239
> 
> On Tue, Feb 05, 2008 at 02:34:40PM +0300, Dmitry Stogov wrote:
>> We are going to include your md5() implementation into php-5.3.0.
> 
> Great!
> 
>> I confirm at least 25% md5() speedup on my Core2 3GHz, however license 
>> issues are not clear.
>> We are going to distribute files under standard PHP license including 
>> your original copyright notes.
>> The files which are going to be committed are attached.
>>
>> Please confirm your agreement.
> 
> Confirmed.  Please note, however, that there were no "copyright notes"
> on my original files; instead, there was an authorship note and a public
> domain statement.
> 
> I also have some comments on the modified files:
> 
>>    | Copyright (c) 1997-2008 The PHP Group                                |
> ...
>>    | Author: Solar Designer <solar at openwall.com>                       |
> 
> So you claim copyright to a modified version of my code, that I had
> placed in the public domain.  This is fine by me.
> 
> I do not formally require it (in fact, I can't), but maybe the "Author"
> line could be changed to either:
> 
>    | Original author: Solar Designer <solar at openwall.com>              |
> 
> or:
> 
>    | Authors: Solar Designer <solar at openwall.com> with further         |
>    | modifications by others.                                             |
> 
> (or you can make it more explicit, e.g. "... by The PHP Group" if that
> is appropriate - or whatever).
> 
>> /* MD5 context. */
>> typedef struct {
>> 	php_uint32 lo, hi;
>> 	php_uint32 a, b, c, d;
>> 	unsigned char buffer[64];
>> 	php_uint32 block[16];
>> } PHP_MD5_CTX;
> 
> Maybe it would be better to do:
> 
> typedef php_uint32 MD5_u32plus;
> 
> and use the latter type.  This would reduce the number of changes
> between my version of the code and yours, making it easier for you to
> sync to any newer versions of the code that I might make.
> 
>>    | Author: Solar Designer <solar at openwall.com>                       |
> 
> If you do choose to change this in the .h file, then do the same in the
> .c, obviously.
> 
>> #if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__))
>> # if defined(__LITTLE_ENDIAN__)
>> #  undef WORDS_BIGENDIAN
>> # else 
>> #  if defined(__BIG_ENDIAN__)
>> #   define WORDS_BIGENDIAN
>> #  endif
>> # endif
>> #endif
> 
> This looks wrong to me.  One of the specific properties of my
> implementation is that it does not strictly depend on the endianness
> being correctly specified at compile-time (and at all, for that matter).
> However, if you do happen to use the (little-endian and unaligned-OK)
> optimized code on a system that is not in fact little-endian or does not
> in fact tolerate unaligned accesses, then problems will arise!  So any
> #if's you use must assume (might-be-big-endian and might-disallow-unaligned)
> by default.
> 
> In fact, I am only aware of three widespread and general-purpose
> architectures that satisfy the criteria for the optimized code:
> 
> #if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
> 
> Thus, I suggest that you leave the above #if intact, the way it was in
> the patch that I submitted.  Do not explicitly check for any endianness
> macros - this is bound to cause problems.
> 
>> /*
>>  *  * SET reads 4 input bytes in little-endian byte order and stores them
>>  *   * in a properly aligned word in host byte order.
>>  *    *
>>  *     * The check for little-endian architectures that tolerate unaligned
>>  *      * memory accesses is just an optimization.  Nothing will break if it
>>  *       * doesn't work.
>>  *        */
>> #ifndef WORDS_BIGENDIAN
>> # define SET(n) \
>> 	(*(php_uint32 *)&ptr[(n) * 4])
>> # define GET(n) \
>> 	SET(n)
>> #else
> ...
> 
> As explained above, I strongly recommend that you revert your "#ifndef
> WORDS_BIGENDIAN" to my "#if ..."
> 
> What if an architecture is big-endian, but WORDS_BIGENDIAN just happens
> to not be specified?  You'll have incorrect results (not MD5), whereas
> with my version of the code, everything will be just fine.
> 
> Similarly, regardless of endianness, if WORDS_BIGENDIAN is not specified
> (maybe because the architecture is in fact little-endian), but the
> architecture does not tolerate unaligned accesses (at all or supports
> them with kernel emulation), things will go wrong (SIGBUS or very poor
> performance and a flood of kernel messages).  This issue can't occur
> with my original #if that only lists specific known-safe architectures.
> 
>> 		data = body(ctx, data, size & ~(unsigned long)0x3f);
> 
> If you change all of my unsigned long's to size_t, you should change
> this one as well.
> 
> When on a 64-bit system (userland pointer size), your size_t better be
> 64-bit as well (I have not checked whether this is necessarily the case;
> I hope so).
> 
>> PHPAPI void PHP_MD5Final(unsigned char *result, PHP_MD5_CTX *ctx)
>> {
>> 	unsigned long used, free;
> 
> Here's another one.
> 
> Thanks,
> 
> Alexander Peslyak <solar at openwall.com>
> GPG key ID: 5B341F15  fp: B3FB 63F4 D7A3 BCCC 6F6E  FC55 A2FC 027C 5B34 1F15
> http://www.openwall.com - bringing security into open computing environments

--------------020309080801090609010402
Content-Type: text/plain;
 name="md5.c"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="md5.c"

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2008 The PHP Group                                |
   +----------------------------------------------------------------------+
   | 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          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Alexander Peslyak (Solar Designer) <solar at openwall.com>   |
   +----------------------------------------------------------------------+
*/

/* $Id:$ */

#include "php.h"
#include "md5.h"

PHPAPI void make_digest(char *md5str, const unsigned char *digest) /* {{{ */
{
	make_digest_ex(md5str, digest, 16);
}
/* }}} */

PHPAPI void make_digest_ex(char *md5str, const unsigned char *digest, int len) /* {{{ */
{
	static const char hexits[17] = "0123456789abcdef";
	int i;

	for (i = 0; i < len; i++) {
		md5str[i * 2]       = hexits[digest[i] >> 4];
		md5str[(i * 2) + 1] = hexits[digest[i] &  0x0F];
	}
	md5str[len * 2] = '\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_ex(md5str, digest, 16);
		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;
	php_stream    *stream;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b", &arg, &arg_len, &raw_output) == FAILURE) {
		return;
	}
	
	stream = php_stream_open_wrapper(arg, "rb", REPORT_ERRORS | ENFORCE_SAFE_MODE, NULL);
	if (!stream) {
		RETURN_FALSE;
	}

	PHP_MD5Init(&context);

	while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
		PHP_MD5Update(&context, buf, n);
	}

	PHP_MD5Final(digest, &context);

	php_stream_close(stream);

	if (n<0) {
		RETURN_FALSE;
	}

	if (raw_output) {
		RETURN_STRINGL(digest, 16, 1);
	} else {
		make_digest_ex(md5str, digest, 16);
		RETVAL_STRING(md5str, 1);
	}
}
/* }}} */

/*
 *  * This is an OpenSSL-compatible implementation of the RSA Data Security,
 *   * Inc. MD5 Message-Digest Algorithm (RFC 1321).
 *    *
 *     * Written by Solar Designer <solar at openwall.com> in 2001, and placed
 *      * in the public domain.  There's absolutely no warranty.
 *       *
 *        * This differs from Colin Plumb's older public domain implementation in
 *         * that no 32-bit integer data type is required, there's no compile-time
 *          * endianness configuration, and the function prototypes match OpenSSL's.
 *           * The primary goals are portability and ease of use.
 *            *
 *             * This implementation is meant to be fast, but not as fast as possible.
 *              * Some known optimizations are not included to reduce source code size
 *               * and avoid compile-time configuration.
 *                */

#include <string.h>

/*
 *  * The basic MD5 functions.
 *   *
 *    * F and G are optimized compared to their RFC 1321 definitions for
 *     * architectures that lack an AND-NOT instruction, just like in Colin Plumb's
 *      * implementation.
 *       */
#define F(x, y, z)			((z) ^ ((x) & ((y) ^ (z))))
#define G(x, y, z)			((y) ^ ((z) & ((x) ^ (y))))
#define H(x, y, z)			((x) ^ (y) ^ (z))
#define I(x, y, z)			((y) ^ ((x) | ~(z)))

/*
 *  * The MD5 transformation for all four rounds.
 *   */
#define STEP(f, a, b, c, d, x, t, s) \
	(a) += f((b), (c), (d)) + (x) + (t); \
	(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
	(a) += (b);

/*
 *  * SET reads 4 input bytes in little-endian byte order and stores them
 *   * in a properly aligned word in host byte order.
 *    *
 *     * The check for little-endian architectures that tolerate unaligned
 *      * memory accesses is just an optimization.  Nothing will break if it
 *       * doesn't work.
 *        */
#if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
# define SET(n) \
	(*(php_uint32 *)&ptr[(n) * 4])
# define GET(n) \
	SET(n)
#else
# define SET(n) \
	(ctx->block[(n)] = \
	(php_uint32)ptr[(n) * 4] | \
	((php_uint32)ptr[(n) * 4 + 1] << 8) | \
	((php_uint32)ptr[(n) * 4 + 2] << 16) | \
	((php_uint32)ptr[(n) * 4 + 3] << 24))
# define GET(n) \
	(ctx->block[(n)])
#endif

/*
 *  * This processes one or more 64-byte data blocks, but does NOT update
 *   * the bit counters.  There are no alignment requirements.
 *    */
static const void *body(PHP_MD5_CTX *ctx, const void *data, size_t size)
{
	const unsigned char *ptr;
	php_uint32 a, b, c, d;
	php_uint32 saved_a, saved_b, saved_c, saved_d;

	ptr = data;

	a = ctx->a;
	b = ctx->b;
	c = ctx->c;
	d = ctx->d;

	do {
		saved_a = a;
		saved_b = b;
		saved_c = c;
		saved_d = d;

/* Round 1 */
		STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
		STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
		STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
		STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
		STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
		STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
		STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
		STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
		STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
		STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
		STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
		STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
		STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
		STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
		STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
		STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)

/* Round 2 */
		STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
		STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
		STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
		STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
		STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
		STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
		STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
		STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
		STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
		STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
		STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
		STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
		STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
		STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
		STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
		STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)

/* Round 3 */
		STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
		STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
		STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
		STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
		STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
		STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
		STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
		STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
		STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
		STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
		STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
		STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
		STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
		STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
		STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
		STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)

/* Round 4 */
		STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
		STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
		STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
		STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
		STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
		STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
		STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
		STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
		STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
		STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
		STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
		STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
		STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
		STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
		STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
		STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)

		a += saved_a;
		b += saved_b;
		c += saved_c;
		d += saved_d;

		ptr += 64;
	} while (size -= 64);

	ctx->a = a;
	ctx->b = b;
	ctx->c = c;
	ctx->d = d;

	return ptr;
}

PHPAPI void PHP_MD5Init(PHP_MD5_CTX *ctx)
{
	ctx->a = 0x67452301;
	ctx->b = 0xefcdab89;
	ctx->c = 0x98badcfe;
	ctx->d = 0x10325476;

	ctx->lo = 0;
	ctx->hi = 0;
}

PHPAPI void PHP_MD5Update(PHP_MD5_CTX *ctx, const void *data, size_t size)
{
	php_uint32 saved_lo;
	size_t used, free;

	saved_lo = ctx->lo;
	if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo) {
		ctx->hi++;
	}
	ctx->hi += size >> 29;

	used = saved_lo & 0x3f;

	if (used) {
		free = 64 - used;

		if (size < free) {
			memcpy(&ctx->buffer[used], data, size);
			return;
		}

		memcpy(&ctx->buffer[used], data, free);
		data = (unsigned char *)data + free;
		size -= free;
		body(ctx, ctx->buffer, 64);
	}

	if (size >= 64) {
		data = body(ctx, data, size & ~(size_t)0x3f);
		size &= 0x3f;
	}

	memcpy(ctx->buffer, data, size);
}

PHPAPI void PHP_MD5Final(unsigned char *result, PHP_MD5_CTX *ctx)
{
	php_uint32 used, free;

	used = ctx->lo & 0x3f;

	ctx->buffer[used++] = 0x80;

	free = 64 - used;

	if (free < 8) {
		memset(&ctx->buffer[used], 0, free);
		body(ctx, ctx->buffer, 64);
		used = 0;
		free = 64;
	}

	memset(&ctx->buffer[used], 0, free - 8);

	ctx->lo <<= 3;
	ctx->buffer[56] = ctx->lo;
	ctx->buffer[57] = ctx->lo >> 8;
	ctx->buffer[58] = ctx->lo >> 16;
	ctx->buffer[59] = ctx->lo >> 24;
	ctx->buffer[60] = ctx->hi;
	ctx->buffer[61] = ctx->hi >> 8;
	ctx->buffer[62] = ctx->hi >> 16;
	ctx->buffer[63] = ctx->hi >> 24;

	body(ctx, ctx->buffer, 64);

	result[0] = ctx->a;
	result[1] = ctx->a >> 8;
	result[2] = ctx->a >> 16;
	result[3] = ctx->a >> 24;
	result[4] = ctx->b;
	result[5] = ctx->b >> 8;
	result[6] = ctx->b >> 16;
	result[7] = ctx->b >> 24;
	result[8] = ctx->c;
	result[9] = ctx->c >> 8;
	result[10] = ctx->c >> 16;
	result[11] = ctx->c >> 24;
	result[12] = ctx->d;
	result[13] = ctx->d >> 8;
	result[14] = ctx->d >> 16;
	result[15] = ctx->d >> 24;

	memset(ctx, 0, sizeof(*ctx));
}

--------------020309080801090609010402
Content-Type: text/plain;
 name="md5.h"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="md5.h"

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2008 The PHP Group                                |
   +----------------------------------------------------------------------+
   | 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          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Alexander Peslyak (Solar Designer) <solar at openwall.com>   |
   +----------------------------------------------------------------------+
*/

/* $Id:$ */

#ifndef MD5_H
#define MD5_H

PHPAPI void make_digest(char *md5str, const unsigned char *digest);
PHPAPI void make_digest_ex(char *md5str, const unsigned char *digest, int len);

PHP_NAMED_FUNCTION(php_if_md5);
PHP_NAMED_FUNCTION(php_if_md5_file);

#include "ext/standard/basic_functions.h"

/*
 *  * This is an OpenSSL-compatible implementation of the RSA Data Security,
 *   * Inc. MD5 Message-Digest Algorithm (RFC 1321).
 *    *
 *     * Written by Solar Designer <solar at openwall.com> in 2001, and placed
 *      * in the public domain.  There's absolutely no warranty.
 *       *
 *        * See md5.c for more information.
 *         */

/* MD5 context. */
typedef struct {
	php_uint32 lo, hi;
	php_uint32 a, b, c, d;
	unsigned char buffer[64];
	php_uint32 block[16];
} PHP_MD5_CTX;

PHPAPI void PHP_MD5Init(PHP_MD5_CTX *ctx);
PHPAPI void PHP_MD5Update(PHP_MD5_CTX *ctx, const void *data, size_t size);
PHPAPI void PHP_MD5Final(unsigned char *result, PHP_MD5_CTX *ctx);

#endif

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