161 lines
4.9 KiB
C
161 lines
4.9 KiB
C
/*****************************************************************************
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*
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* $Id: encrypt.c,v 1.4 2005/04/12 17:25:42 mbse Exp $
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* Purpose ...............: MBSE BBS Shadow Password Suite
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* Original Source .......: Shadow Password Suite
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* Original Copyright ....: Julianne Frances Haugh and others.
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*
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*****************************************************************************
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* Copyright (C) 1997-2003
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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/*
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* Copyright 1990 - 1993, Julianne Frances Haugh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "../config.h"
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_CRYPT_H
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#include <crypt.h>
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#endif
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#include "encrypt.h"
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#ifdef MD5_CRYPT
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extern char *md5_crypt();
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#endif
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char *pw_encrypt(const char *clear, const char *salt)
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{
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static char cipher[128];
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char *cp;
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#ifdef SW_CRYPT
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static int count;
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#endif
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#ifdef MD5_CRYPT
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/*
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* If the salt string from the password file or from crypt_make_salt()
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* begins with the magic string, use the new algorithm.
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*/
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if (strncmp(salt, "$1$", 3) == 0)
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return md5_crypt(clear, salt);
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#endif
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#ifdef SW_CRYPT
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/*
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* Copy over the salt. It is always the first two
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* characters of the string.
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*/
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cipher[0] = salt[0];
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cipher[1] = salt[1];
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cipher[2] = '\0';
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/*
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* Loop up to ten times on the cleartext password.
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* This is because the input limit for passwords is
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* 80 characters.
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*
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* The initial salt is that provided by the user, or the
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* one generated above. The subsequent salts are gotten
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* from the first two characters of the previous encrypted
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* block of characters.
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*/
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for (count = 0;count < 10;count++) {
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cp = crypt (clear, salt);
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if (!cp) {
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perror("crypt");
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exit(1);
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}
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if (strlen(cp) != 13)
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return cp;
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strcat (cipher, cp + 2);
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salt = cipher + 11 * count + 2;
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if (strlen (clear) > 8)
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clear += 8;
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else
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break;
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}
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#else
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cp = crypt (clear, salt);
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if (!cp) {
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/*
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* Single Unix Spec: crypt() may return a null pointer,
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* and set errno to indicate an error. The caller doesn't
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* expect us to return NULL, so...
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*/
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perror("crypt");
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exit(1);
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}
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if (strlen(cp) != 13)
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return cp; /* nonstandard crypt() in libc, better bail out */
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strcpy (cipher, cp);
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#ifdef DOUBLESIZE
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if (strlen (clear) > 8) {
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cp = crypt (clear + 8, salt);
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if (!cp) {
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perror("crypt");
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exit(1);
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}
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strcat (cipher, cp + 2);
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}
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#endif /* DOUBLESIZE */
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#endif /* SW_CRYPT */
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return cipher;
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}
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