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/* Wrapper around MD5 sum replacement for crypt function.
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <crypt.h>
#include <errno.h>
#include <string.h>
/* Define our magic string to mark salt for MD5 encryption
replacement. This is meant to be the same as for other MD5 based
encryption implementations. */
static const char md5_salt_prefix[] = "$1$";
/* Prototypes for the MD5 encryption replacement functions. */
extern char *__md5_crypt_r (const char *key, const char *salt, char *buffer,
int buflen);
extern char *__md5_crypt (const char *key, const char *salt);
extern char *__crypt_r (const char *key, const char *salt,
struct crypt_data *__restrict data);
/* We recognize an intended call of the MD5 crypt replacement function
by the first 3 characters of the salt string. If they match the
MD5 magic string we want MD5 encryption replacement. */
char *
__crypt_r (key, salt, data)
const char *key;
const char *salt;
struct crypt_data *__restrict data;
{
if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
return __md5_crypt_r (key, salt, (char *) data,
sizeof (struct crypt_data));
/* We don't have DES encryption. */
__set_errno (EOPNOTSUPP);
return NULL;
}
weak_alias (__crypt_r, crypt_r)
/* The same here, only we call the non-reentrant version. */
char *
crypt (key, salt)
const char *key;
const char *salt;
{
if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
return __md5_crypt (key, salt);
/* We don't have DES encryption. */
__set_errno (EOPNOTSUPP);
return NULL;
}
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