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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/fcntl.h>
#include <bsm/audit.h>
#include <bsm/audit_record.h>
#include <bsm/audit_uevents.h>
#include <bsm/libbsm.h>
#include <bsm/audit_private.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <netinet/in.h>
#include <tsol/label.h>
#include <locale.h>
#include <unistd.h>
#include <generic.h>
static au_event_t rshd_event; /* audit event number */
static uint32_t rshd_addr[4]; /* peer address */
static void generate_record(char *, char *, char *, int, char *);
static void setup_session(char *);
static int selected(uid_t, char *, au_event_t, int);
int
audit_rshd_setup()
{
rshd_event = AUE_rshd;
return (0);
}
/* ARGSUSED */
int
audit_rshd_fail(msg, hostname, remuser, locuser, cmdbuf)
char *msg; /* message containing failure information */
char *hostname; /* hostname of machine requesting service */
char *remuser; /* username at machine requesting service */
char *locuser; /* username of local machine */
char *cmdbuf; /* command line to be executed locally */
{
if (cannot_audit(0)) {
return (0);
}
generate_record(remuser, locuser, cmdbuf, -1, msg);
return (0);
}
/* ARGSUSED */
int
audit_rshd_success(hostname, remuser, locuser, cmdbuf)
char *hostname; /* hostname of machine requesting service */
char *remuser; /* username at machine requesting service */
char *locuser; /* username at local machine */
char *cmdbuf; /* command line to be executed locally */
{
if (cannot_audit(0)) {
return (0);
}
generate_record(remuser, locuser, cmdbuf, 0, "");
setup_session(locuser);
return (0);
}
#include <pwd.h>
static void
generate_record(char *remuser, /* username at machine requesting service */
char *locuser, /* username of local machine */
char *cmdbuf, /* command line to be executed locally */
int sf_flag, /* success (0) or failure (-1) flag */
char *msg) /* message containing failure information */
{
int rd; /* audit record descriptor */
char buf[256]; /* temporary buffer */
char *tbuf; /* temporary buffer */
int tlen;
const char *gtxt;
uid_t uid;
gid_t gid;
pid_t pid;
struct passwd *pwd;
struct auditinfo_addr info;
if (cannot_audit(0)) {
return;
}
pwd = getpwnam(locuser);
if (pwd == NULL) {
uid = (uid_t)-1;
gid = (gid_t)-1;
} else {
uid = pwd->pw_uid;
gid = pwd->pw_gid;
}
if (!selected(uid, locuser, rshd_event, sf_flag))
return;
pid = getpid();
/* see if terminal id already set */
if (getaudit_addr(&info, sizeof (info)) < 0) {
perror("getaudit");
}
rd = au_open();
(void) au_write(rd, au_to_subject_ex(uid, uid, gid, uid, gid, pid, pid,
&info.ai_termid));
if (is_system_labeled())
(void) au_write(rd, au_to_mylabel());
gtxt = dgettext(bsm_dom, "cmd %s");
tlen = strlen(gtxt) + strlen(cmdbuf) + 1;
if ((tbuf = malloc(tlen)) == NULL) {
(void) au_close(rd, 0, 0);
return;
}
(void) snprintf(tbuf, tlen, gtxt, cmdbuf);
(void) au_write(rd, au_to_text(tbuf));
(void) free(tbuf);
if (strcmp(remuser, locuser) != 0) {
(void) snprintf(buf, sizeof (buf), dgettext(bsm_dom,
"remote user %s"), remuser);
(void) au_write(rd, au_to_text(buf));
}
if (sf_flag == -1) {
(void) snprintf(buf, sizeof (buf), dgettext(bsm_dom,
"local user %s"), locuser);
(void) au_write(rd, au_to_text(buf));
(void) au_write(rd, au_to_text(msg));
}
#ifdef _LP64
(void) au_write(rd, au_to_return64(sf_flag, (int64_t)0));
#else
(void) au_write(rd, au_to_return32(sf_flag, (int32_t)0));
#endif
if (au_close(rd, 1, rshd_event) < 0) {
(void) au_close(rd, 0, 0);
}
}
static int
selected(uid_t uid, char *locuser, au_event_t event, int sf)
{
int sorf;
struct au_mask mask;
mask.am_success = mask.am_failure = 0;
if (uid > MAXEPHUID) {
/* get non-attrib flags */
(void) auditon(A_GETKMASK, (caddr_t)&mask, sizeof (mask));
} else {
(void) au_user_mask(locuser, &mask);
}
if (sf == 0) {
sorf = AU_PRS_SUCCESS;
} else if (sf == -1) {
sorf = AU_PRS_FAILURE;
} else {
sorf = AU_PRS_BOTH;
}
return (au_preselect(event, &mask, sorf, AU_PRS_REREAD));
}
static void
setup_session(char *locuser)
{
int rc;
struct auditinfo_addr info;
au_mask_t mask;
uid_t uid;
struct passwd *pwd;
pwd = getpwnam(locuser);
if (pwd == NULL)
uid = (uid_t)-1;
else
uid = pwd->pw_uid;
/* see if terminal id already set */
if (getaudit_addr(&info, sizeof (info)) < 0) {
perror("getaudit");
}
info.ai_auid = uid;
info.ai_asid = getpid();
mask.am_success = 0;
mask.am_failure = 0;
(void) au_user_mask(locuser, &mask);
info.ai_mask.am_success = mask.am_success;
info.ai_mask.am_failure = mask.am_failure;
rshd_addr[0] = info.ai_termid.at_addr[0];
rshd_addr[1] = info.ai_termid.at_addr[1];
rshd_addr[2] = info.ai_termid.at_addr[2];
rshd_addr[3] = info.ai_termid.at_addr[3];
rc = setaudit_addr(&info, sizeof (info));
if (rc < 0) {
perror("setaudit");
}
}
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