#include "php.h"
#include "ext/standard/md5.h"
#include "md5crypt.h"
static unsigned char itoa64[] =
"./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;
}
}
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);
sp = salt;
if (strncmp(sp, MD5_MAGIC, MD5_MAGIC_LEN) == 0)
sp += MD5_MAGIC_LEN;
for (ep = sp; *ep != '\0' && *ep != '$' && ep < (sp + 8); ep++)
continue;
sl = ep - sp;
PHP_MD5Init(&ctx);
PHP_MD5Update(&ctx, (const unsigned char *)pw, pwl);
PHP_MD5Update(&ctx, (const unsigned char *)MD5_MAGIC, MD5_MAGIC_LEN);
PHP_MD5Update(&ctx, (const unsigned char *)sp, sl);
PHP_MD5Init(&ctx1);
PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);
PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
PHP_MD5Final(final, &ctx1);
for (pl = pwl; pl > 0; pl -= 16)
PHP_MD5Update(&ctx, final, (unsigned int)(pl > 16 ? 16 : pl));
memset(final, 0, sizeof(final));
for (i = pwl; i != 0; i >>= 1)
if ((i & 1) != 0)
PHP_MD5Update(&ctx, final, 1);
else
PHP_MD5Update(&ctx, (const unsigned char *)pw, 1);
memcpy(passwd, MD5_MAGIC, MD5_MAGIC_LEN);
strlcpy(passwd + MD5_MAGIC_LEN, sp, sl + 1);
strcat(passwd, "$");
PHP_MD5Final(final, &ctx);
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';
memset(final, 0, sizeof(final));
return (passwd);
}