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+----------------------------------------------------------------------+
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2004 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_0.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Edin Kadribasic |
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+----------------------------------------------------------------------+
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/* $Id: md5crypt.c,v 1.5 2004/01/08 08:18:21 andi Exp $ */
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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* from FreeBSD: crypt.c,v 1.5 1996/10/14 08:34:02 phk Exp
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* via OpenBSD: md5crypt.c,v 1.9 1997/07/23 20:58:27 kstailey Exp
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* via NetBSD: md5crypt.c,v 1.4.2.1 2002/01/22 19:31:59 he Exp
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#include "ext/standard/md5.h"
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static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
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"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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static void to64(char *, php_uint32, int);
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to64(char *s, php_uint32 v, int n)
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*s++ = itoa64[v & 0x3f];
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* MD5 password encryption.
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md5_crypt(const char *pw, const char *salt)
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static char passwd[120], *p;
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unsigned char final[16];
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unsigned int i, sl, pwl;
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PHP_MD5_CTX ctx, ctx1;
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/* Refine the salt first */
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/* If it starts with the magic string, then skip that */
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if (strncmp(sp, MD5_MAGIC, MD5_MAGIC_LEN) == 0)
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/* It stops at the first '$', max 8 chars */
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for (ep = sp; *ep != '\0' && *ep != '$' && ep < (sp + 8); ep++)
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/* get the length of the true salt */
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/* The password first, since that is what is most unknown */
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PHP_MD5Update(&ctx, (const unsigned char *)pw, pwl);
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/* Then our magic string */
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PHP_MD5Update(&ctx, (const unsigned char *)MD5_MAGIC, MD5_MAGIC_LEN);
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/* Then the raw salt */
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PHP_MD5Update(&ctx, (const unsigned char *)sp, sl);
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/* Then just as many characters of the MD5(pw,salt,pw) */
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Final(final, &ctx1);
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for (pl = pwl; pl > 0; pl -= 16)
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PHP_MD5Update(&ctx, final, (unsigned int)(pl > 16 ? 16 : pl));
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/* Don't leave anything around in vm they could use. */
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memset(final, 0, sizeof(final));
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/* Then something really weird... */
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for (i = pwl; i != 0; i >>= 1)
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PHP_MD5Update(&ctx, final, 1);
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PHP_MD5Update(&ctx, (const unsigned char *)pw, 1);
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/* Now make the output string */
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memcpy(passwd, MD5_MAGIC, MD5_MAGIC_LEN);
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strlcpy(passwd + MD5_MAGIC_LEN, sp, sl + 1);
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PHP_MD5Final(final, &ctx);
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* And now, just to make sure things don't run too fast. On a 60 MHz
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* Pentium this takes 34 msec, so you would need 30 seconds to build
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* a 1000 entry dictionary...
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for (i = 0; i < 1000; i++) {
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Update(&ctx1, final, 16);
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PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Update(&ctx1, final, 16);
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Final(final, &ctx1);
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p = passwd + sl + MD5_MAGIC_LEN + 1;
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l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; to64(p,l,4); p += 4;
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l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; to64(p,l,4); p += 4;
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l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; to64(p,l,4); p += 4;
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l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; to64(p,l,4); p += 4;
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l = (final[ 4]<<16) | (final[10]<<8) | final[ 5]; to64(p,l,4); p += 4;
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l = final[11] ; to64(p,l,2); p += 2;
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/* Don't leave anything around in vm they could use. */
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memset(final, 0, sizeof(final));