/* +----------------------------------------------------------------------+ | PHP Version 5 | +----------------------------------------------------------------------+ | Copyright (c) 1997-2006 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: Edin Kadribasic | +----------------------------------------------------------------------+ */ /* $Id$ */ /* * ---------------------------------------------------------------------------- * "THE BEER-WARE LICENSE" (Revision 42): * wrote this file. As long as you retain this notice you * can do whatever you want with this stuff. If we meet some day, and you think * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * * from FreeBSD: crypt.c,v 1.5 1996/10/14 08:34:02 phk Exp * via OpenBSD: md5crypt.c,v 1.9 1997/07/23 20:58:27 kstailey Exp * via NetBSD: md5crypt.c,v 1.4.2.1 2002/01/22 19:31:59 he Exp * */ #include "php.h" #include "ext/standard/md5.h" #include "md5crypt.h" static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */ "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; static void to64(char *, php_uint32, int); static void to64(char *s, php_uint32 v, int n) { while (--n >= 0) { *s++ = itoa64[v & 0x3f]; v >>= 6; } } /* * MD5 password encryption. */ char * md5_crypt(const char *pw, const char *salt) { static char passwd[120], *p; const char *sp, *ep; unsigned char final[16]; unsigned int i, sl, pwl; PHP_MD5_CTX ctx, ctx1; php_uint32 l; int pl; pwl = strlen(pw); /* Refine the salt first */ sp = salt; /* If it starts with the magic string, then skip that */ if (strncmp(sp, MD5_MAGIC, MD5_MAGIC_LEN) == 0) sp += MD5_MAGIC_LEN; /* It stops at the first '$', max 8 chars */ for (ep = sp; *ep != '\0' && *ep != '$' && ep < (sp + 8); ep++) continue; /* get the length of the true salt */ sl = ep - sp; PHP_MD5Init(&ctx); /* The password first, since that is what is most unknown */ PHP_MD5Update(&ctx, (const unsigned char *)pw, pwl); /* Then our magic string */ PHP_MD5Update(&ctx, (const unsigned char *)MD5_MAGIC, MD5_MAGIC_LEN); /* Then the raw salt */ PHP_MD5Update(&ctx, (const unsigned char *)sp, sl); /* Then just as many characters of the MD5(pw,salt,pw) */ PHP_MD5Init(&ctx1); PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl); PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl); PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl); PHP_MD5Final(final, &ctx1); for (pl = pwl; pl > 0; pl -= 16) PHP_MD5Update(&ctx, final, (unsigned int)(pl > 16 ? 16 : pl)); /* Don't leave anything around in vm they could use. */ memset(final, 0, sizeof(final)); /* Then something really weird... */ for (i = pwl; i != 0; i >>= 1) if ((i & 1) != 0) PHP_MD5Update(&ctx, final, 1); else PHP_MD5Update(&ctx, (const unsigned char *)pw, 1); /* Now make the output string */ memcpy(passwd, MD5_MAGIC, MD5_MAGIC_LEN); strlcpy(passwd + MD5_MAGIC_LEN, sp, sl + 1); strcat(passwd, "$"); PHP_MD5Final(final, &ctx); /* * And now, just to make sure things don't run too fast. On a 60 MHz * Pentium this takes 34 msec, so you would need 30 seconds to build * a 1000 entry dictionary... */ for (i = 0; i < 1000; i++) { PHP_MD5Init(&ctx1); if ((i & 1) != 0) PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl); else PHP_MD5Update(&ctx1, final, 16); if ((i % 3) != 0) PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl); if ((i % 7) != 0) PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl); if ((i & 1) != 0) PHP_MD5Update(&ctx1, final, 16); else PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl); PHP_MD5Final(final, &ctx1); } p = passwd + sl + MD5_MAGIC_LEN + 1; l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; to64(p,l,4); p += 4; l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; to64(p,l,4); p += 4; l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; to64(p,l,4); p += 4; l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; to64(p,l,4); p += 4; l = (final[ 4]<<16) | (final[10]<<8) | final[ 5]; to64(p,l,4); p += 4; l = final[11] ; to64(p,l,2); p += 2; *p = '\0'; /* Don't leave anything around in vm they could use. */ memset(final, 0, sizeof(final)); return (passwd); }