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