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19d3e29bf5
- Remove dead code from php_crypt_r.c This code has been commented out since the file was added in 2008. It's safe to say that no-one is ever going to use it. - Fix typo in comment in php_crypt_r.c - Remove redundant Windows-only implementation of php_md5_crypt_r There is a portable implementation in the same file, which is selected if not building for Windows. But why should Windows have its own special implementation of this function at all? There doesn't seem to be any good reason. Better to use the portable implementation on all platforms. - Don't define useless __CONST macro in php_crypt_r.h This preprocessor macro is not used anywhere. - Add comment on functions for encoding data as Base64 - Remove dead code from crypt_blowfish.h - Remove unneeded junk comments from crypt_freesec.c - Remove dead code from crypt_blowfish.c This function has been commented out since 2011.
205 lines
5.7 KiB
C
205 lines
5.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 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_01.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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| Authors: Pierre Alain Joye <pajoye@php.net |
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+----------------------------------------------------------------------+
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*/
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/*
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* License for the Unix md5crypt implementation (md5_crypt):
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*
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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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*
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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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*
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*/
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#include "php.h"
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#include <string.h>
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#ifdef PHP_WIN32
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# include <windows.h>
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# include <Wincrypt.h>
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#endif
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#include "php_crypt_r.h"
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#include "crypt_freesec.h"
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#include "ext/standard/md5.h"
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#ifdef ZTS
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MUTEX_T php_crypt_extended_init_lock;
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#endif
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void php_init_crypt_r()
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{
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#ifdef ZTS
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php_crypt_extended_init_lock = tsrm_mutex_alloc();
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#endif
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}
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void php_shutdown_crypt_r()
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{
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#ifdef ZTS
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tsrm_mutex_free(php_crypt_extended_init_lock);
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#endif
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}
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void _crypt_extended_init_r(void)
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{
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static int initialized = 0;
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#ifdef ZTS
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tsrm_mutex_lock(php_crypt_extended_init_lock);
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#endif
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if (!initialized) {
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initialized = 1;
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_crypt_extended_init();
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}
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#ifdef ZTS
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tsrm_mutex_unlock(php_crypt_extended_init_lock);
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#endif
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}
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/* MD5 crypt implementation using the windows CryptoApi */
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#define MD5_MAGIC "$1$"
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#define MD5_MAGIC_LEN 3
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static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
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"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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/* Convert a 16/32 bit integer to Base64 string representation */
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static void to64(char *s, int32_t v, int n)
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{
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while (--n >= 0) {
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*s++ = itoa64[v & 0x3f];
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v >>= 6;
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}
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}
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/*
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* MD5 password encryption.
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*/
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char * php_md5_crypt_r(const char *pw, const char *salt, char *out)
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{
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ZEND_TLS char passwd[MD5_HASH_MAX_LEN], *p;
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const char *sp, *ep;
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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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uint32_t l;
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int pl;
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pwl = strlen(pw);
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/* Refine the salt first */
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sp = salt;
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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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sp += MD5_MAGIC_LEN;
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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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sl = ep - sp;
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PHP_MD5Init(&ctx);
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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_MD5Init(&ctx1);
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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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ZEND_SECURE_ZERO(final, 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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if ((i & 1) != 0)
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PHP_MD5Update(&ctx, final, 1);
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else
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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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strcat(passwd, "$");
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PHP_MD5Final(final, &ctx);
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/*
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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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*/
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for (i = 0; i < 1000; i++) {
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PHP_MD5Init(&ctx1);
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if ((i & 1) != 0)
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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else
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PHP_MD5Update(&ctx1, final, 16);
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if ((i % 3) != 0)
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PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);
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if ((i % 7) != 0)
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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if ((i & 1) != 0)
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PHP_MD5Update(&ctx1, final, 16);
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else
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PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
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PHP_MD5Final(final, &ctx1);
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}
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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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*p = '\0';
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/* Don't leave anything around in vm they could use. */
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ZEND_SECURE_ZERO(final, sizeof(final));
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return (passwd);
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}
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