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/*-
* Copyright 1998 Juniper Networks, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include <syslog.h> /* XXX */
#include <stdio.h>
#include <string.h>
#include <skey.h>
#define PAM_SM_AUTH
#include <security/pam_modules.h>
#include "pam_mod_misc.h"
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
int retval;
const char *user;
const char *response;
struct skey skey;
char challenge[128];
char prompt[128];
char resp_buf[128];
int options;
int i;
int e;
options = 0;
for (i = 0; i < argc; i++)
pam_std_option(&options, argv[i]);
/*
* It doesn't make sense to use a password that has already been
* typed in, since we haven't presented the challenge to the user
* yet.
*/
options &= ~(PAM_OPT_USE_FIRST_PASS | PAM_OPT_TRY_FIRST_PASS);
if ((retval = pam_get_user(pamh, &user, NULL)) != PAM_SUCCESS)
return retval;
if (skeyinfo(&skey, user, challenge) != 0)
return PAM_AUTH_ERR;
snprintf(prompt, sizeof prompt, "%s\nPassword: ", challenge);
if ((retval = pam_get_pass(pamh, &response, prompt, options)) !=
PAM_SUCCESS)
return retval;
if (response[0] == '\0' && !(options & PAM_OPT_ECHO_PASS)) {
options |= PAM_OPT_ECHO_PASS;
snprintf(prompt, sizeof prompt,
"%s\nPassword [echo on]: ", challenge);
if ((retval = pam_get_pass(pamh, &response, prompt,
options)) != PAM_SUCCESS)
return retval;
}
/*
* Skeyinfo closed the database file, so we have to call skeylookup
* to open it again.
*/
if ((e = skeylookup(&skey, user)) != 0) {
if (e == -1) {
syslog(LOG_ERR, "Error opening S/Key database");
return PAM_SERVICE_ERR;
} else
return PAM_AUTH_ERR;
}
/* We have to copy the response, because skeyverify mucks with it. */
snprintf(resp_buf, sizeof resp_buf, "%s", response);
/*
* Skeyverify is supposed to return -1 only if an error occurs.
* But it returns -1 even if the response string isn't in the form
* it expects. Thus we can't log an error and can only check for
* success or lack thereof.
*/
return skeyverify(&skey, resp_buf) == 0 ? PAM_SUCCESS : PAM_AUTH_ERR;
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
return PAM_SUCCESS;
}
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