105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 1999 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 4. Products derived from this software may not be called "Sudo" nor
|
|
* may "Sudo" appear in their names without specific prior written
|
|
* permission from the author.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#ifdef STDC_HEADERS
|
|
#include <stdlib.h>
|
|
#endif /* STDC_HEADERS */
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif /* HAVE_UNISTD_H */
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#ifdef HAVE_STRINGS_H
|
|
#include <strings.h>
|
|
#endif /* HAVE_STRINGS_H */
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <pwd.h>
|
|
|
|
#include "sudo.h"
|
|
#include "sudo_auth.h"
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] = "$Sudo$";
|
|
#endif /* lint */
|
|
|
|
#define DESLEN 13
|
|
#define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
|
|
|
|
int
|
|
passwd_verify(pw, pass, auth)
|
|
struct passwd *pw;
|
|
char *pass;
|
|
sudo_auth *auth;
|
|
{
|
|
char sav, *epass;
|
|
size_t pw_len;
|
|
int error;
|
|
|
|
pw_len = strlen(pw->pw_passwd);
|
|
|
|
#ifdef HAVE_GETAUTHUID
|
|
/* Ultrix shadow passwords may use crypt16() */
|
|
error = strcmp(pw->pw_passwd, (char *) crypt16(pass, pw->pw_passwd));
|
|
if (!error)
|
|
return(AUTH_SUCCESS);
|
|
#endif /* HAVE_GETAUTHUID */
|
|
|
|
/*
|
|
* Truncate to 8 chars if standard DES since not all crypt()'s do this.
|
|
* If this turns out not to be safe we will have to use OS #ifdef's (sigh).
|
|
*/
|
|
sav = pass[8];
|
|
if (pw_len == DESLEN || HAS_AGEINFO(pw->pw_passwd, pw_len))
|
|
pass[8] = '\0';
|
|
|
|
/*
|
|
* Normal UN*X password check.
|
|
* HP-UX may add aging info (separated by a ',') at the end so
|
|
* only compare the first DESLEN characters in that case.
|
|
*/
|
|
epass = (char *) crypt(pass, pw->pw_passwd);
|
|
pass[8] = sav;
|
|
if (HAS_AGEINFO(pw->pw_passwd, pw_len) && strlen(epass) == DESLEN)
|
|
error = strncmp(pw->pw_passwd, epass, DESLEN);
|
|
else
|
|
error = strcmp(pw->pw_passwd, epass);
|
|
|
|
return(error ? AUTH_FAILURE : AUTH_SUCCESS);
|
|
}
|