140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/*-
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* Copyright 1998 Juniper Networks, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define PAM_SM_AUTH
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#include <security/pam_modules.h>
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#include "pam_mod_misc.h"
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#define PASSWORD_PROMPT "Password:"
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extern int klogin(struct passwd *, char *, char *, char *);
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/* Globals used by klogin.c */
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int notickets = 1;
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int noticketsdontcomplain = 1;
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char *krbtkfile_env;
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
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{
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struct options options;
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int retval;
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const char *user;
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char *principal;
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char *instance;
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const char *password;
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char localhost[MAXHOSTNAMELEN + 1];
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struct passwd *pwd;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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retval = pam_get_user(pamh, &user, NULL);
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if (retval != PAM_SUCCESS)
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PAM_RETURN(retval);
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PAM_LOG("Got user: %s", user);
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retval = pam_get_pass(pamh, &password, PASSWORD_PROMPT, &options);
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if (retval != PAM_SUCCESS)
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PAM_RETURN(retval);
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PAM_LOG("Got password");
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if (gethostname(localhost, sizeof localhost - 1) == -1)
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PAM_RETURN(PAM_SYSTEM_ERR);
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PAM_LOG("Got localhost: %s", localhost);
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principal = strdup(user);
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if (principal == NULL)
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PAM_RETURN(PAM_BUF_ERR);
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instance = strchr(principal, '.');
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if (instance != NULL)
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*instance++ = '\0';
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else
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instance = "";
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PAM_LOG("Got principal.instance: %s.%s", principal, instance);
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retval = PAM_AUTH_ERR;
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pwd = getpwnam(user);
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if (pwd != NULL) {
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if (klogin(pwd, instance, localhost, (char *)password) == 0) {
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if (!(flags & PAM_SILENT) && notickets && !noticketsdontcomplain)
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pam_prompt(pamh, PAM_ERROR_MSG,
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"Warning: no Kerberos tickets issued",
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NULL);
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/*
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* XXX - I think the ticket file isn't supposed to
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* be created until pam_sm_setcred() is called.
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*/
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if (krbtkfile_env != NULL)
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setenv("KRBTKFILE", krbtkfile_env, 1);
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retval = PAM_SUCCESS;
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}
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PAM_LOG("Done klogin()");
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}
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/*
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* The PAM infrastructure will obliterate the cleartext
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* password before returning to the application.
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*/
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free(principal);
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if (retval != PAM_SUCCESS)
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PAM_VERBOSE_ERROR("Kerberos IV refuses you");
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PAM_RETURN(retval);
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}
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PAM_EXTERN int
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pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_SUCCESS);
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}
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PAM_MODULE_ENTRY("pam_kerberosIV");
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