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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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define PAM_SM_AUTH
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/pam_mod_misc.h>
#define PASSWORD_PROMPT "Password:"
extern int klogin(struct passwd *, char *, char *, char *);
/* Globals used by klogin.c */
int notickets = 1;
int noticketsdontcomplain = 1;
char *krbtkfile_env;
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
int retval;
const char *user;
char *principal;
char *instance;
const char *password;
char localhost[MAXHOSTNAMELEN + 1];
struct passwd *pwd;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
retval = pam_get_user(pamh, &user, NULL);
if (retval != PAM_SUCCESS)
PAM_RETURN(retval);
PAM_LOG("Got user: %s", user);
retval = pam_get_pass(pamh, &password, PASSWORD_PROMPT, &options);
if (retval != PAM_SUCCESS)
PAM_RETURN(retval);
PAM_LOG("Got password");
if (gethostname(localhost, sizeof localhost - 1) == -1)
PAM_RETURN(PAM_SYSTEM_ERR);
PAM_LOG("Got localhost: %s", localhost);
principal = strdup(user);
if (principal == NULL)
PAM_RETURN(PAM_BUF_ERR);
instance = strchr(principal, '.');
if (instance != NULL)
*instance++ = '\0';
else
instance = "";
PAM_LOG("Got principal.instance: %s.%s", principal, instance);
retval = PAM_AUTH_ERR;
pwd = getpwnam(user);
if (pwd != NULL) {
if (klogin(pwd, instance, localhost, (char *)password) == 0) {
if (!(flags & PAM_SILENT) && notickets && !noticketsdontcomplain)
pam_prompt(pamh, PAM_ERROR_MSG,
"Warning: no Kerberos tickets issued",
NULL);
/*
* XXX - I think the ticket file isn't supposed to
* be created until pam_sm_setcred() is called.
*/
if (krbtkfile_env != NULL)
setenv("KRBTKFILE", krbtkfile_env, 1);
retval = PAM_SUCCESS;
}
PAM_LOG("Done klogin()");
}
/*
* The PAM infrastructure will obliterate the cleartext
* password before returning to the application.
*/
free(principal);
if (retval != PAM_SUCCESS)
PAM_VERBOSE_ERROR("Kerberos IV refuses you");
PAM_RETURN(retval);
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_SUCCESS);
}
PAM_MODULE_ENTRY("pam_kerberosIV");
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