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openssh/openssh-4.5p1-audit.patch

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--- openssh-4.5p1/loginrec.c.audit 2006-09-07 14:57:54.000000000 +0200
+++ openssh-4.5p1/loginrec.c 2006-12-21 12:17:35.000000000 +0100
@@ -175,6 +175,10 @@
#include "auth.h"
#include "buffer.h"
+#ifdef HAVE_LINUX_AUDIT
+# include <libaudit.h>
+#endif
+
#ifdef HAVE_UTIL_H
# include <util.h>
#endif
@@ -201,6 +205,9 @@
int utmpx_write_entry(struct logininfo *li);
int wtmp_write_entry(struct logininfo *li);
int wtmpx_write_entry(struct logininfo *li);
+#ifdef HAVE_LINUX_AUDIT
+int linux_audit_write_entry(struct logininfo *li);
+#endif
int lastlog_write_entry(struct logininfo *li);
int syslogin_write_entry(struct logininfo *li);
@@ -439,6 +446,10 @@
/* set the timestamp */
login_set_current_time(li);
+#ifdef HAVE_LINUX_AUDIT
+ if (linux_audit_write_entry(li) == 0)
+ fatal("linux_audit_write_entry failed: %s", strerror(errno));
+#endif
#ifdef USE_LOGIN
syslogin_write_entry(li);
#endif
@@ -1393,6 +1404,51 @@
}
#endif /* USE_WTMPX */
+#ifdef HAVE_LINUX_AUDIT
+int
+linux_audit_record_event(int uid, const char *username,
+ const char *hostname, const char *ip, const char *ttyn, int success)
+{
+ char buf[64];
+ int audit_fd, rc;
+
+ 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 */
+ }
+ if (username == NULL)
+ snprintf(buf, sizeof(buf), "uid=%d", uid);
+ else
+ snprintf(buf, sizeof(buf), "acct=%s", username);
+ rc = audit_log_user_message(audit_fd, AUDIT_USER_LOGIN,
+ buf, hostname, ip, ttyn, success);
+ close(audit_fd);
+ if (rc >= 0)
+ return 1;
+ else
+ return 0;
+}
+
+int
+linux_audit_write_entry(struct logininfo *li)
+{
+ switch(li->type) {
+ case LTYPE_LOGIN:
+ return (linux_audit_record_event(li->uid, NULL, li->hostname,
+ NULL, li->line, 1));
+ case LTYPE_LOGOUT:
+ return (1); /* We only care about logins */
+ default:
+ logit("%s: invalid type field", __func__);
+ return (0);
+ }
+}
+#endif /* HAVE_LINUX_AUDIT */
+
/**
** Low-level libutil login() functions
**/
--- openssh-4.5p1/loginrec.h.audit 2006-08-05 04:39:40.000000000 +0200
+++ openssh-4.5p1/loginrec.h 2006-12-21 12:17:35.000000000 +0100
@@ -127,5 +127,9 @@
char *line_abbrevname(char *dst, const char *src, int dstsize);
void record_failed_login(const char *, const char *, const char *);
+#ifdef HAVE_LINUX_AUDIT
+int linux_audit_record_event(int uid, const char *username,
+ const char *hostname, const char *ip, const char *ttyn, int success);
+#endif /* HAVE_LINUX_AUDIT */
#endif /* _HAVE_LOGINREC_H_ */
--- openssh-4.5p1/Makefile.in.audit 2006-10-23 23:44:47.000000000 +0200
+++ openssh-4.5p1/Makefile.in 2006-12-21 12:19:39.000000000 +0100
@@ -45,6 +45,7 @@
CPPFLAGS=-I. -I$(srcdir) @CPPFLAGS@ $(PATHS) @DEFS@
LIBS=@LIBS@
LIBSELINUX=@LIBSELINUX@
+LIBAUDIT=@LIBAUDIT@
SSHDLIBS=@SSHDLIBS@
LIBEDIT=@LIBEDIT@
LIBPAM=@LIBPAM@
@@ -139,7 +140,7 @@
$(LD) -o $@ $(SSHOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
sshd$(EXEEXT): libssh.a $(LIBCOMPAT) $(SSHDOBJS)
- $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(LIBWRAP) $(LIBPAM) $(LIBSELINUX) $(SSHDLIBS) $(LIBS)
+ $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(LIBWRAP) $(LIBPAM) $(LIBSELINUX) $(LIBAUDIT) $(SSHDLIBS) $(LIBS)
scp$(EXEEXT): $(LIBCOMPAT) libssh.a scp.o progressmeter.o
$(LD) -o $@ scp.o progressmeter.o bufaux.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
--- openssh-4.5p1/config.h.in.audit 2006-11-07 14:07:01.000000000 +0100
+++ openssh-4.5p1/config.h.in 2006-12-21 12:17:35.000000000 +0100
@@ -1305,6 +1305,9 @@
/* Define if you want SELinux support. */
#undef WITH_SELINUX
+/* Define if you want Linux audit support. */
+#undef HAVE_LINUX_AUDIT
+
/* Define to 1 if your processor stores words with the most significant byte
first (like Motorola and SPARC, unlike Intel and VAX). */
#undef WORDS_BIGENDIAN
--- openssh-4.5p1/configure.ac.audit 2006-12-21 12:17:34.000000000 +0100
+++ openssh-4.5p1/configure.ac 2006-12-21 12:17:35.000000000 +0100
@@ -3161,6 +3161,20 @@
)
AC_SUBST(LIBSELINUX)
+# Check whether user wants Linux audit support
+LINUX_AUDIT_MSG="no"
+LIBAUDIT=""
+AC_ARG_WITH(linux-audit,
+ [ --with-linux-audit Enable Linux audit support],
+ [ if test "x$withval" != "xno" ; then
+ AC_DEFINE(HAVE_LINUX_AUDIT,1,[Define if you want Linux audit support.])
+ LINUX_AUDIT_MSG="yes"
+ AC_CHECK_HEADERS(libaudit.h)
+ LIBAUDIT="-laudit"
+ fi
+ ])
+AC_SUBST(LIBAUDIT)
+
# Check whether user wants Kerberos 5 support
KRB5_MSG="no"
AC_ARG_WITH(kerberos5,
@@ -3982,6 +3996,7 @@
echo " OSF SIA support: $SIA_MSG"
echo " KerberosV support: $KRB5_MSG"
echo " SELinux support: $SELINUX_MSG"
+echo " Linux audit support: $LINUX_AUDIT_MSG"
echo " Smartcard support: $SCARD_MSG"
echo " S/KEY support: $SKEY_MSG"
echo " TCP Wrappers support: $TCPW_MSG"
--- openssh-4.5p1/auth.c.audit 2006-10-27 17:10:16.000000000 +0200
+++ openssh-4.5p1/auth.c 2006-12-21 12:17:35.000000000 +0100
@@ -286,6 +286,12 @@
get_canonical_hostname(options.use_dns), "ssh", &loginmsg);
# endif
#endif
+#if HAVE_LINUX_AUDIT
+ if (authenticated == 0 && !authctxt->postponed) {
+ linux_audit_record_event(-1, authctxt->user, NULL,
+ get_remote_ipaddr(), "sshd", 0);
+ }
+#endif
#ifdef SSH_AUDIT_EVENTS
if (authenticated == 0 && !authctxt->postponed)
audit_event(audit_classify_auth(method));
@@ -492,6 +498,10 @@
record_failed_login(user,
get_canonical_hostname(options.use_dns), "ssh");
#endif
+#ifdef HAVE_LINUX_AUDIT
+ linux_audit_record_event(-1, user, NULL, get_remote_ipaddr(),
+ "sshd", 0);
+#endif
#ifdef SSH_AUDIT_EVENTS
audit_event(SSH_INVALID_USER);
#endif /* SSH_AUDIT_EVENTS */
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