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- /*
- * Copyright 2010 Red Hat, Inc. All rights reserved.
- * Use is subject to license terms.
- *
- * 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 ``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.
- *
- * Red Hat author: Jan F. Chadima <jchadima@redhat.com>
- */
-
- #include "includes.h"
- #if defined(USE_LINUX_AUDIT)
- #include <libaudit.h>
- #include <unistd.h>
- #include <string.h>
-
- #include "log.h"
- #include "audit.h"
- #include "canohost.h"
- #include "packet.h"
-
- const char *audit_username(void);
-
- int
- linux_audit_record_event(int uid, const char *username, const char *hostname,
- const char *ip, const char *ttyn, int success)
- {
- int audit_fd, rc, saved_errno;
-
- if ((audit_fd = audit_open()) < 0) {
- if (errno == EINVAL || errno == EPROTONOSUPPORT ||
- errno == EAFNOSUPPORT)
- return 1; /* No audit support in kernel */
- else
- return 0; /* Must prevent login */
- }
- rc = audit_log_acct_message(audit_fd, AUDIT_USER_LOGIN,
- NULL, "login", username ? username : "(unknown)",
- username == NULL ? uid : -1, hostname, ip, ttyn, success);
- saved_errno = errno;
- close(audit_fd);
-
- /*
- * Do not report error if the error is EPERM and sshd is run as non
- * root user.
- */
- if ((rc == -EPERM) && (geteuid() != 0))
- rc = 0;
- errno = saved_errno;
-
- return rc >= 0;
- }
-
- /* Below is the sshd audit API code */
-
- void
- audit_connection_from(const char *host, int port)
- {
- /* not implemented */
- }
-
- void
- audit_run_command(const char *command)
- {
- /* not implemented */
- }
-
- void
- audit_session_open(struct logininfo *li)
- {
- if (linux_audit_record_event(li->uid, NULL, li->hostname, NULL,
- li->line, 1) == 0)
- fatal("linux_audit_write_entry failed: %s", strerror(errno));
- }
-
- void
- audit_session_close(struct logininfo *li)
- {
- /* not implemented */
- }
-
- void
- audit_event(struct ssh *ssh, ssh_audit_event_t event)
- {
- switch(event) {
- case SSH_AUTH_SUCCESS:
- case SSH_CONNECTION_CLOSE:
- case SSH_NOLOGIN:
- case SSH_LOGIN_EXCEED_MAXTRIES:
- case SSH_LOGIN_ROOT_DENIED:
- break;
- case SSH_AUTH_FAIL_NONE:
- case SSH_AUTH_FAIL_PASSWD:
- case SSH_AUTH_FAIL_KBDINT:
- case SSH_AUTH_FAIL_PUBKEY:
- case SSH_AUTH_FAIL_HOSTBASED:
- case SSH_AUTH_FAIL_GSSAPI:
- case SSH_INVALID_USER:
- linux_audit_record_event(-1, audit_username(), NULL,
- ssh_remote_ipaddr(ssh), "sshd", 0);
- break;
- default:
- debug("%s: unhandled event %d", __func__, event);
- break;
- }
- }
- #endif /* USE_LINUX_AUDIT */
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