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- (dtucker) [LICENCE Makefile.in audit-bsm.c audit-linux.c audit.c au…
…dit.h configure.ac defines.h loginrec.c] Bug #1402: add linux audit subsystem support, based on patches from Tomas Mraz and jchadima at redhat.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| /* $Id: audit-linux.c,v 1.1 2011/01/17 10:15:30 dtucker Exp $ */ | ||
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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 <[email protected]> | ||
| */ | ||
|
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| #include "includes.h" | ||
| #if defined(USE_LINUX_AUDIT) | ||
| #include <libaudit.h> | ||
| #include <unistd.h> | ||
| #include <string.h> | ||
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| #include "log.h" | ||
| #include "audit.h" | ||
| #include "canohost.h" | ||
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| const char* audit_username(void); | ||
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| 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; | ||
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| audit_fd = audit_open(); | ||
| if (audit_fd < 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); | ||
| } | ||
|
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| /* Below is the sshd audit API code */ | ||
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| void | ||
| audit_connection_from(const char *host, int port) | ||
| { | ||
| } | ||
| /* not implemented */ | ||
|
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| void | ||
| audit_run_command(const char *command) | ||
| { | ||
| /* not implemented */ | ||
| } | ||
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| 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)); | ||
| } | ||
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| void | ||
| audit_session_close(struct logininfo *li) | ||
| { | ||
| /* not implemented */ | ||
| } | ||
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| void | ||
| audit_event(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; | ||
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| 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, | ||
| get_remote_ipaddr(), "sshd", 0); | ||
| break; | ||
|
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| default: | ||
| debug("%s: unhandled event %d", __func__, event); | ||
| } | ||
| } | ||
|
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||
| #endif /* USE_LINUX_AUDIT */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| # $Id: configure.ac,v 1.466 2011/01/17 05:17:09 djm Exp $ | ||
| # $Id: configure.ac,v 1.467 2011/01/17 10:15:30 dtucker Exp $ | ||
| # | ||
| # Copyright (c) 1999-2004 Damien Miller | ||
| # | ||
|
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@@ -15,7 +15,7 @@ | |
| # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
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| AC_INIT(OpenSSH, Portable, [email protected]) | ||
| AC_REVISION($Revision: 1.466 $) | ||
| AC_REVISION($Revision: 1.467 $) | ||
| AC_CONFIG_SRCDIR([ssh.c]) | ||
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| # local macros | ||
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@@ -1378,7 +1378,7 @@ int main(void) | |
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| AUDIT_MODULE=none | ||
| AC_ARG_WITH(audit, | ||
| [ --with-audit=module Enable EXPERIMENTAL audit support (modules=debug,bsm)], | ||
| [ --with-audit=module Enable audit support (modules=debug,bsm,linux)], | ||
| [ | ||
| AC_MSG_CHECKING(for supported audit module) | ||
| case "$withval" in | ||
|
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@@ -1402,10 +1402,18 @@ AC_ARG_WITH(audit, | |
| AC_CHECK_FUNCS(getaudit_addr aug_get_machine) | ||
| AC_DEFINE(USE_BSM_AUDIT, 1, [Use BSM audit module]) | ||
| ;; | ||
| linux) | ||
| AC_MSG_RESULT(linux) | ||
| AUDIT_MODULE=linux | ||
| dnl Checks for headers, libs and functions | ||
| AC_CHECK_HEADERS(libaudit.h) | ||
| SSHDLIBS="$SSHDLIBS -laudit" | ||
| AC_DEFINE(USE_LINUX_AUDIT, 1, [Use Linux audit module]) | ||
| ;; | ||
| debug) | ||
| AUDIT_MODULE=debug | ||
| AC_MSG_RESULT(debug) | ||
| AC_DEFINE(SSH_AUDIT_EVENTS, 1, Use audit debugging module) | ||
| AC_DEFINE(SSH_AUDIT_EVENTS, 1, [Use audit debugging module]) | ||
| ;; | ||
| no) | ||
| AC_MSG_RESULT(no) | ||
|
|
||
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