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/*
* Copyright (c) 1999-2005 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <pwd.h>
#include "sudo.h"
#include "sudo_auth.h"
#ifndef lint
__unused static const char rcsid[] = "$Sudo: passwd.c,v 1.17 2005/02/12 22:56:07 millert Exp $";
#endif /* lint */
#define DESLEN 13
#define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
int
passwd_init(pw, promptp, auth)
struct passwd *pw;
char **promptp;
sudo_auth *auth;
{
#ifdef HAVE_SKEYACCESS
if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
return(AUTH_FAILURE);
#endif
return(AUTH_SUCCESS);
}
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);
}
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