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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <pwd.h>
#include <syslog.h>
#include <libintl.h>
#include "sample_utils.h"
/*
*
* Sample module for pam_sm_authenticate.
*
* options -
*
* debug
* use_first_pass
* try_first_pass
* first_pass_good (first password is always good when used with use/try)
* first_pass_bad (first password is always bad when used with use/try)
* pass=foobar (set good password to "foobar". default good password
* is test)
* always_fail always return PAM_AUTH_ERR
* always_succeed always return PAM_SUCCESS
* always_ignore
*
*
*/
/*
* pam_sm_authenticate - Authenticate user
*/
/*ARGSUSED*/
int
pam_sm_authenticate(
pam_handle_t *pamh,
int flags,
int argc,
const char **argv)
{
char *user;
struct pam_conv *pam_convp;
int err, result = PAM_AUTH_ERR;
struct pam_response *ret_resp = (struct pam_response *)0;
char messages[PAM_MAX_NUM_MSG][PAM_MAX_MSG_SIZE];
int debug = 0;
int try_first_pass = 0;
int use_first_pass = 0;
int first_pass_good = 0;
int first_pass_bad = 0;
int i, num_msg;
char *firstpass, *password;
char the_password[64];
if (debug)
syslog(LOG_DEBUG, "Sample Authentication\n");
(void) strcpy(the_password, "test");
for (i = 0; i < argc; i++) {
if (strcmp(argv[i], "debug") == 0)
debug = 1;
else if (strcmp(argv[i], "try_first_pass") == 0)
try_first_pass = 1;
else if (strcmp(argv[i], "first_pass_good") == 0)
first_pass_good = 1;
else if (strcmp(argv[i], "first_pass_bad") == 0)
first_pass_bad = 1;
else if (strcmp(argv[i], "use_first_pass") == 0)
use_first_pass = 1;
else if (strcmp(argv[i], "always_fail") == 0)
return (PAM_AUTH_ERR);
else if (strcmp(argv[i], "always_succeed") == 0)
return (PAM_SUCCESS);
else if (strcmp(argv[i], "always_ignore") == 0)
return (PAM_IGNORE);
else if (sscanf(argv[i], "pass=%64s", the_password) == 1) {
/*EMPTY*/;
}
else
syslog(LOG_DEBUG, "illegal scheme option %s", argv[i]);
}
err = pam_get_user(pamh, &user, NULL);
if (err != PAM_SUCCESS)
return (err);
err = pam_get_item(pamh, PAM_CONV, (void**) &pam_convp);
if (err != PAM_SUCCESS)
return (err);
(void) pam_get_item(pamh, PAM_AUTHTOK, (void **) &firstpass);
if (firstpass && (use_first_pass || try_first_pass)) {
if ((first_pass_good ||
strncmp(firstpass, the_password,
strlen(the_password)) == 0) &&
!first_pass_bad) {
result = PAM_SUCCESS;
goto out;
}
if (use_first_pass) goto out;
}
/*
* Get the password from the user
*/
if (firstpass) {
(void) snprintf(messages[0], sizeof (messages[0]),
dgettext(TEXT_DOMAIN, "TEST Password: "));
} else {
(void) snprintf(messages[0], sizeof (messages[0]),
dgettext(TEXT_DOMAIN, "Password: "));
}
num_msg = 1;
err = __get_authtok(pam_convp->conv,
num_msg, messages, NULL, &ret_resp);
if (err != PAM_SUCCESS) {
result = err;
goto out;
}
password = ret_resp->resp;
if (password == NULL) {
result = PAM_AUTH_ERR;
goto out;
}
/* one last ditch attempt to "login" to TEST */
if (strncmp(password, the_password, strlen(the_password)) == 0) {
result = PAM_SUCCESS;
if (firstpass == NULL) {
/* this is the first password, stash it away */
(void) pam_set_item(pamh, PAM_AUTHTOK, password);
}
}
out:
if (num_msg > 0) {
if (ret_resp != 0) {
if (ret_resp->resp != 0) {
/* avoid leaving password cleartext around */
(void) memset(ret_resp->resp, 0,
strlen(ret_resp->resp));
}
__free_resp(num_msg, ret_resp);
ret_resp = 0;
}
}
return (result);
}
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