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/*
** Copyright 2001-2002 Double Precision, Inc. See COPYING for
** distribution information.
*/
#if HAVE_CONFIG_H
#include "courier_auth_config.h"
#endif
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#if HAVE_CRYPT_H
#include <crypt.h>
#endif
#include "auth.h"
#include <sys/time.h>
static const char rcsid[]="$Id: cryptpassword.c,v 1.8 2005/07/13 00:34:59 mrsam Exp $";
#if HAVE_CRYPT
#if NEED_CRYPT_PROTOTYPE
extern char *crypt(const char *, const char *);
#endif
#endif
#if HAVE_MD5LIB
#include "md5/md5.h"
#endif
#if HAVE_SHA1LIB
#include "sha1/sha1.h"
#endif
static const char crypt_salt[65]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./";
static const char *crypt_hash(const char *pw)
{
struct timeval tv;
char salt[3];
gettimeofday(&tv, NULL);
tv.tv_sec |= tv.tv_usec;
tv.tv_sec ^= getpid();
salt[0]=crypt_salt[ tv.tv_sec % 64 ];
tv.tv_sec /= 64;
salt[1]=crypt_salt[ tv.tv_sec % 64 ];
salt[2]=0;
return (crypt(pw, salt));
}
#if HAVE_MD5LIB
static const char *crypt_md5_wrapper(const char *pw)
{
struct timeval tv;
char salt[10];
int i;
gettimeofday(&tv, NULL);
tv.tv_sec |= tv.tv_usec;
tv.tv_sec ^= getpid();
strcpy(salt, "$1$");
for (i=3; i<8; i++)
{
salt[i]=crypt_salt[ tv.tv_sec % 64 ];
tv.tv_sec /= 64;
}
strcpy(salt+i, "$");
return (md5_crypt(pw, salt));
}
#endif
char *authcryptpasswd(const char *password, const char *encryption_hint)
{
const char *(*hash_func)(const char *)=0;
const char *pfix=0;
const char *p;
char *pp;
#if HAVE_MD5LIB
if (!encryption_hint || strncmp(encryption_hint, "$1$", 3) == 0)
{
pfix="";
hash_func=crypt_md5_wrapper;
}
if (!encryption_hint || strncasecmp(encryption_hint, "{MD5}", 5) == 0)
{
hash_func= &md5_hash_courier;
pfix="{MD5}";
}
#endif
#if HAVE_SHA1LIB
if (!encryption_hint || strncasecmp(encryption_hint, "{SHA}", 5) == 0)
{
hash_func= &sha1_hash;
pfix="{SHA}";
}
if (!encryption_hint ||
strncasecmp(encryption_hint, "{SHA256}", 8) == 0)
{
hash_func= &sha256_hash;
pfix="{SHA256}";
}
#endif
if (!hash_func)
{
hash_func= &crypt_hash;
pfix="{CRYPT}";
}
p= (*hash_func)(password);
if (!p || (pp=malloc(strlen(pfix)+strlen(p)+1)) == 0)
return (0);
return (strcat(strcpy(pp, pfix), p));
}
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