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/*
* pam_unix session management
*
* Copyright Alexander O. Yuriev, 1996. All rights reserved.
* Copyright Jan Rękorajski, 1999. 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, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED ``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 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 "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <security/_pam_macros.h>
#include <security/pam_modules.h>
#include <security/pam_ext.h>
#include <security/pam_modutil.h>
#include "support.h"
/*
* PAM framework looks for these entry-points to pass control to the
* session module.
*/
int
pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
char *user_name, *service;
unsigned long long ctrl;
int retval;
const char *login_name;
D(("called."));
ctrl = _set_ctrl(pamh, flags, NULL, NULL, NULL, argc, argv);
retval = pam_get_item(pamh, PAM_USER, (void *) &user_name);
if (user_name == NULL || *user_name == '\0' || retval != PAM_SUCCESS) {
pam_syslog(pamh, LOG_ERR,
"open_session - error recovering username");
return PAM_SESSION_ERR; /* How did we get authenticated with
no username?! */
}
retval = pam_get_item(pamh, PAM_SERVICE, (void *) &service);
if (service == NULL || *service == '\0' || retval != PAM_SUCCESS) {
pam_syslog(pamh, LOG_CRIT,
"open_session - error recovering service");
return PAM_SESSION_ERR;
}
login_name = pam_modutil_getlogin(pamh);
if (login_name == NULL) {
login_name = "";
}
if (off (UNIX_QUIET, ctrl)) {
char uid[32];
struct passwd *pwd = pam_modutil_getpwnam (pamh, user_name);
if (pwd == NULL) {
snprintf (uid, 32, "getpwnam error");
}
else {
snprintf (uid, 32, "%u", pwd->pw_uid);
}
pam_syslog(pamh, LOG_INFO, "session opened for user %s(uid=%s) by %s(uid=%lu)", user_name, uid, login_name, (unsigned long)getuid());
}
return PAM_SUCCESS;
}
int
pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
char *user_name, *service;
unsigned long long ctrl;
int retval;
D(("called."));
ctrl = _set_ctrl(pamh, flags, NULL, NULL, NULL, argc, argv);
retval = pam_get_item(pamh, PAM_USER, (void *) &user_name);
if (user_name == NULL || *user_name == '\0' || retval != PAM_SUCCESS) {
pam_syslog(pamh, LOG_ERR,
"close_session - error recovering username");
return PAM_SESSION_ERR; /* How did we get authenticated with
no username?! */
}
retval = pam_get_item(pamh, PAM_SERVICE, (void *) &service);
if (service == NULL || *service == '\0' || retval != PAM_SUCCESS) {
pam_syslog(pamh, LOG_CRIT,
"close_session - error recovering service");
return PAM_SESSION_ERR;
}
if (off (UNIX_QUIET, ctrl))
pam_syslog(pamh, LOG_INFO, "session closed for user %s",
user_name);
return PAM_SUCCESS;
}
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