File openssh-7.2p2-audit.patch of Package openssh.8419

Overview Repositories Revisions Requests Users Attributes Meta

File openssh-7.2p2-audit.patch of Package openssh.8419

# HG changeset patch
# Parent  fd37335de0fea44a296b6b847f07a6701c6e2a21
Extended auditing through the Linux Auditing subsystem

diff --git a/openssh-7.2p2/Makefile.in b/openssh-7.2p2/Makefile.in
--- a/openssh-7.2p2/Makefile.in
+++ b/openssh-7.2p2/Makefile.in
@@ -94,16 +94,17 @@ LIBSSH_OBJS=${LIBOPENSSH_OBJS} \
 	ssh-ed25519.o digest-openssl.o digest-libc.o hmac.o \
 	sc25519.o ge25519.o fe25519.o ed25519.o verify.o hash.o blocks.o \
 	kex.o kexdh.o kexgex.o kexecdh.o kexc25519.o \
 	kexdhc.o kexgexc.o kexecdhc.o kexc25519c.o kexgssc.o \
 	kexdhs.o kexgexs.o kexecdhs.o kexc25519s.o kexgsss.o \
 	platform-pledge.o
 
 LIBSSH_OBJS += fips.o
+LIBSSH_OBJS += auditstub.o
 
 SSHOBJS= ssh.o readconf.o clientloop.o sshtty.o \
 	sshconnect.o sshconnect1.o sshconnect2.o mux.o
 
 SSHDOBJS=sshd.o auth-rhosts.o auth-passwd.o auth-rsa.o auth-rh-rsa.o \
 	audit.o audit-bsm.o audit-linux.o platform.o \
 	sshpty.o sshlogin.o servconf.o serverloop.o \
 	auth.o auth1.o auth2.o auth-options.o session.o \
diff --git a/openssh-7.2p2/audit-bsm.c b/openssh-7.2p2/audit-bsm.c
--- a/openssh-7.2p2/audit-bsm.c
+++ b/openssh-7.2p2/audit-bsm.c
@@ -370,34 +370,53 @@ audit_connection_from(const char *host, 
 	/* this is used on IPv4-only machines */
 	tid->port = (dev_t)port;
 	tid->machine = inet_addr(host);
 	snprintf(buf, sizeof(buf), "%08x", tid->machine);
 	debug3("BSM audit: machine ID %s", buf);
 #endif
 }
 
-void
+int
 audit_run_command(const char *command)
 {
 	/* not implemented */
+	return 0;
+}
+
+void
+audit_end_command(int handle, const char *command)
+{
+	/* not implemented */
+}
+
+void
+audit_count_session_open(void)
+{
+	/* not necessary */
 }
 
 void
 audit_session_open(struct logininfo *li)
 {
 	/* not implemented */
 }
 
 void
 audit_session_close(struct logininfo *li)
 {
 	/* not implemented */
 }
 
+int
+audit_keyusage(int host_user, const char *type, unsigned bits, char *fp, int rv)
+{
+	/* not implemented */
+}
+
 void
 audit_event(ssh_audit_event_t event)
 {
 	char    textbuf[BSM_TEXTBUFSZ];
 	static int logged_in = 0;
 	const char *user = the_authctxt ? the_authctxt->user : "(unknown user)";
 
 	if (cannot_audit(0))
@@ -449,9 +468,45 @@ audit_event(ssh_audit_event_t event)
 	case SSH_AUTH_FAIL_KBDINT:
 		bsm_audit_bad_login("interactive password entry");
 		break;
 
 	default:
 		debug("%s: unhandled event %d", __func__, event);
 	}
 }
+
+void
+audit_unsupported_body(int what)
+{
+	/* not implemented */
+}
+
+void
+audit_kex_body(int ctos, char *enc, char *mac, char *compress, char *pfs, pid_t pid, uid_t uid)
+{
+	/* not implemented */
+}
+
+void
+audit_session_key_free_body(int ctos, pid_t pid, uid_t uid)
+{
+	/* not implemented */
+}
+
+void
+audit_destroy_sensitive_data(const char *fp)
+{
+	/* not implemented */
+}
+
+void
+audit_destroy_sensitive_data(const char *fp, pid_t pid, uid_t uid)
+{
+	/* not implemented */
+}
+
+void
+audit_generate_ephemeral_server_key(const char *fp)
+{
+	/* not implemented */
+}
 #endif /* BSM */
diff --git a/openssh-7.2p2/audit-linux.c b/openssh-7.2p2/audit-linux.c
--- a/openssh-7.2p2/audit-linux.c
+++ b/openssh-7.2p2/audit-linux.c
@@ -30,97 +30,381 @@
 #include "includes.h"
 #if defined(USE_LINUX_AUDIT)
 #include <libaudit.h>
 #include <unistd.h>
 #include <string.h>
 
 #include "log.h"
 #include "audit.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
+#include "misc.h"      /* servconf.h needs misc.h for struct ForwardOptions */
+#include "servconf.h"
 #include "canohost.h"
+#include "packet.h"
+#include "cipher.h"
 
+#define AUDIT_LOG_SIZE 256
+
+extern ServerOptions options;
+extern Authctxt *the_authctxt;
+extern u_int utmp_len;
 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)
+static void
+linux_audit_user_logxxx(int uid, const char *username,
+    const char *hostname, const char *ip, const char *ttyn, int success, int event)
 {
 	int audit_fd, rc, saved_errno;
 
 	audit_fd = audit_open();
 	if (audit_fd < 0) {
 		if (errno == EINVAL || errno == EPROTONOSUPPORT ||
 		    errno == EAFNOSUPPORT)
-			return 1; /* No audit support in kernel */
+			return; /* No audit support in kernel */
 		else
-			return 0; /* Must prevent login */
+			goto fatal_report; /* Must prevent login */
 	}
-	rc = audit_log_acct_message(audit_fd, AUDIT_USER_LOGIN,
+	rc = audit_log_acct_message(audit_fd, event,
 	    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);
+	if (rc < 0) {
+fatal_report:
+		fatal("linux_audit_write_entry failed: %s", strerror(errno));
+	}
 }
 
+static void
+linux_audit_user_auth(int uid, const char *username,
+    const char *hostname, const char *ip, const char *ttyn, int success, int event)
+{
+	int audit_fd, rc, saved_errno;
+	static const char *event_name[] = {
+		"maxtries exceeded",
+		"root denied",
+		"success",
+		"none",
+		"password",
+		"challenge-response",
+		"pubkey",
+		"hostbased",
+		"gssapi",
+		"invalid user",
+		"nologin",
+		"connection closed",
+		"connection abandoned",
+		"unknown"
+	};
+
+	audit_fd = audit_open();
+	if (audit_fd < 0) {
+		if (errno == EINVAL || errno == EPROTONOSUPPORT ||
+		    errno == EAFNOSUPPORT)
+			return; /* No audit support in kernel */
+		else
+			goto fatal_report; /* Must prevent login */
+	}
+
+	if ((event < 0) || (event > SSH_AUDIT_UNKNOWN))
+		event = SSH_AUDIT_UNKNOWN;
+
+	rc = audit_log_acct_message(audit_fd, AUDIT_USER_AUTH,
+	    NULL, event_name[event], 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;
+	if (rc < 0) {
+fatal_report:
+		fatal("linux_audit_write_entry failed: %s", strerror(errno));
+	}
+}
+
+int
+audit_keyusage(int host_user, const char *type, unsigned bits, char *fp, int rv)
+{
+	char buf[AUDIT_LOG_SIZE];
+	int audit_fd, rc, saved_errno;
+
+	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 */
+	}
+	snprintf(buf, sizeof(buf), "%s_auth rport=%d", host_user ? "pubkey" : "hostbased", get_remote_port());
+	rc = audit_log_acct_message(audit_fd, AUDIT_USER_AUTH, NULL,
+		buf, audit_username(), -1, NULL, get_remote_ipaddr(), NULL, rv);
+	if ((rc < 0) && ((rc != -1) || (getuid() == 0)))
+		goto out;
+	/* is the fingerprint_prefix() still needed?
+	snprintf(buf, sizeof(buf), "key algo=%s size=%d fp=%s%s rport=%d",
+			type, bits, sshkey_fingerprint_prefix(), fp, get_remote_port());
+	*/
+	snprintf(buf, sizeof(buf), "key algo=%s size=%d fp=%s rport=%d",
+			type, bits, fp, get_remote_port());
+	rc = audit_log_acct_message(audit_fd, AUDIT_USER_AUTH, NULL,
+		buf, audit_username(), -1, NULL, get_remote_ipaddr(), NULL, rv);
+out:
+	saved_errno = errno;
+	audit_close(audit_fd);
+	errno = saved_errno;
+	/* do not report error if the error is EPERM and sshd is run as non root user */
+	return (rc >= 0) || ((rc == -EPERM) && (getuid() != 0));
+}
+
+static int user_login_count = 0;
+
 /* Below is the sshd audit API code */
 
 void
 audit_connection_from(const char *host, int port)
 {
+	/* not implemented */
 }
-	/* not implemented */
+
+int
+audit_run_command(const char *command)
+{
+	if (!user_login_count++)
+		linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+		    NULL, "ssh", 1, AUDIT_USER_LOGIN);
+	linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+	    NULL, "ssh", 1, AUDIT_USER_START);
+	return 0;
+}
 
 void
-audit_run_command(const char *command)
+audit_end_command(int handle, const char *command)
 {
-	/* not implemented */
+	linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+	    NULL, "ssh", 1, AUDIT_USER_END);
+	if (user_login_count && !--user_login_count)
+		linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+		    NULL, "ssh", 1, AUDIT_USER_LOGOUT);
+}
+
+void
+audit_count_session_open(void)
+{
+	user_login_count++;
 }
 
 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));
+	if (!user_login_count++)
+		linux_audit_user_logxxx(li->uid, NULL, li->hostname,
+		    NULL, li->line, 1, AUDIT_USER_LOGIN);
+	linux_audit_user_logxxx(li->uid, NULL, li->hostname,
+	    NULL, li->line, 1, AUDIT_USER_START);
 }
 
 void
 audit_session_close(struct logininfo *li)
 {
-	/* not implemented */
+	linux_audit_user_logxxx(li->uid, NULL, li->hostname,
+	    NULL, li->line, 1, AUDIT_USER_END);
+	if (user_login_count && !--user_login_count)
+		linux_audit_user_logxxx(li->uid, NULL, li->hostname,
+		    NULL, li->line, 1, AUDIT_USER_LOGOUT);
 }
 
 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:
+		linux_audit_user_auth(-1, audit_username(), NULL,
+			get_remote_ipaddr(), "ssh", 1, event);
 		break;
 
+	case SSH_NOLOGIN:
+	case SSH_LOGIN_ROOT_DENIED:
+		linux_audit_user_auth(-1, audit_username(), NULL,
+			get_remote_ipaddr(), "ssh", 0, event);
+		linux_audit_user_logxxx(-1, audit_username(), NULL,
+			get_remote_ipaddr(), "ssh", 0, AUDIT_USER_LOGIN);
+		break;
+
+	case SSH_LOGIN_EXCEED_MAXTRIES:
 	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:
+		linux_audit_user_auth(-1, audit_username(), NULL,
+			get_remote_ipaddr(), "ssh", 0, event);
+		break;
+
+	case SSH_CONNECTION_CLOSE:
+		if (user_login_count) {
+			while (user_login_count--)
+				linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+				    NULL, "ssh", 1, AUDIT_USER_END);
+			linux_audit_user_logxxx(the_authctxt->pw->pw_uid, NULL, get_remote_name_or_ip(utmp_len, options.use_dns),
+			    NULL, "ssh", 1, AUDIT_USER_LOGOUT);
+		}
+		break;
+
+	case SSH_CONNECTION_ABANDON:
 	case SSH_INVALID_USER:
-		linux_audit_record_event(-1, audit_username(), NULL,
-			get_remote_ipaddr(), "sshd", 0);
+		linux_audit_user_logxxx(-1, audit_username(), NULL,
+			get_remote_ipaddr(), "ssh", 0, AUDIT_USER_LOGIN);
 		break;
 
 	default:
 		debug("%s: unhandled event %d", __func__, event);
 	}
 }
 
+void
+audit_unsupported_body(int what)
+{
+#ifdef AUDIT_CRYPTO_SESSION
+	char buf[AUDIT_LOG_SIZE];
+	const static char *name[] = { "cipher", "mac", "comp" };
+	char *s;
+	int audit_fd;
+
+	snprintf(buf, sizeof(buf), "op=unsupported-%s direction=? cipher=? ksize=? rport=%d laddr=%s lport=%d ",
+		name[what], get_remote_port(), (s = get_local_ipaddr(packet_get_connection_in())),
+		get_local_port());
+	free(s);
+	audit_fd = audit_open();
+	if (audit_fd < 0)
+		/* no problem, the next instruction will be fatal() */
+		return;
+	audit_log_user_message(audit_fd, AUDIT_CRYPTO_SESSION,
+			buf, NULL, get_remote_ipaddr(), NULL, 0);
+	audit_close(audit_fd);
+#endif
+}
+
+const static char *direction[] = { "from-server", "from-client", "both" };
+
+void
+audit_kex_body(int ctos, char *enc, char *mac, char *compress, char *pfs, pid_t pid,
+	       uid_t uid)
+{
+#ifdef AUDIT_CRYPTO_SESSION
+	char buf[AUDIT_LOG_SIZE];
+	int audit_fd, audit_ok;
+	const struct sshcipher *cipher = cipher_by_name(enc);
+	char *s;
+
+	snprintf(buf, sizeof(buf), "op=start direction=%s cipher=%s ksize=%d mac=%s pfs=%s spid=%jd suid=%jd rport=%d laddr=%s lport=%d ",
+		direction[ctos], enc, cipher ? 8 * cipher->key_len : 0, mac, pfs,
+		(intmax_t)pid, (intmax_t)uid,
+		get_remote_port(), (s = get_local_ipaddr(packet_get_connection_in())), get_local_port());
+	free(s);
+	audit_fd = audit_open();
+	if (audit_fd < 0) {
+		if (errno == EINVAL || errno == EPROTONOSUPPORT ||
+					 errno == EAFNOSUPPORT)
+			return; /* No audit support in kernel */
+		else
+			fatal("cannot open audit"); /* Must prevent login */
+	}
+	audit_ok = audit_log_user_message(audit_fd, AUDIT_CRYPTO_SESSION,
+			buf, NULL, get_remote_ipaddr(), NULL, 1);
+	audit_close(audit_fd);
+	/* do not abort if the error is EPERM and sshd is run as non root user */
+	if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
+		fatal("cannot write into audit"); /* Must prevent login */
+#endif
+}
+
+void
+audit_session_key_free_body(int ctos, pid_t pid, uid_t uid)
+{
+	char buf[AUDIT_LOG_SIZE];
+	int audit_fd, audit_ok;
+	char *s;
+
+	snprintf(buf, sizeof(buf), "op=destroy kind=session fp=? direction=%s spid=%jd suid=%jd rport=%d laddr=%s lport=%d ",
+		 direction[ctos], (intmax_t)pid, (intmax_t)uid,
+		 get_remote_port(),
+		 (s = get_local_ipaddr(packet_get_connection_in())),
+		 get_local_port());
+	free(s);
+	audit_fd = audit_open();
+	if (audit_fd < 0) {
+		if (errno != EINVAL && errno != EPROTONOSUPPORT &&
+					 errno != EAFNOSUPPORT)
+			error("cannot open audit");
+		return;
+	}
+	audit_ok = audit_log_user_message(audit_fd, AUDIT_CRYPTO_KEY_USER,
+			buf, NULL, get_remote_ipaddr(), NULL, 1);
+	audit_close(audit_fd);
+	/* do not abort if the error is EPERM and sshd is run as non root user */
+	if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
+		error("cannot write into audit");
+}
+
+void
+audit_destroy_sensitive_data(const char *fp, pid_t pid, uid_t uid)
+{
+	char buf[AUDIT_LOG_SIZE];
+	int audit_fd, audit_ok;
+
+	snprintf(buf, sizeof(buf), "op=destroy kind=server fp=%s direction=? spid=%jd suid=%jd ",
+		fp, (intmax_t)pid, (intmax_t)uid);
+	audit_fd = audit_open();
+	if (audit_fd < 0) {
+		if (errno != EINVAL && errno != EPROTONOSUPPORT &&
+					 errno != EAFNOSUPPORT)
+			error("cannot open audit");
+		return;
+	}
+	audit_ok = audit_log_user_message(audit_fd, AUDIT_CRYPTO_KEY_USER,
+			buf, NULL,
+			listening_for_clients() ? NULL : get_remote_ipaddr(),
+			NULL, 1);
+	audit_close(audit_fd);
+	/* do not abort if the error is EPERM and sshd is run as non root user */
+	if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
+		error("cannot write into audit");
+}
+
+void
+audit_generate_ephemeral_server_key(const char *fp)
+{
+	char buf[AUDIT_LOG_SIZE];
+	int audit_fd, audit_ok;
+
+	snprintf(buf, sizeof(buf), "op=create kind=server fp=%s direction=? ", fp);
+	audit_fd = audit_open();
+	if (audit_fd < 0) {
+		if (errno != EINVAL && errno != EPROTONOSUPPORT &&
+					 errno != EAFNOSUPPORT)
+			error("cannot open audit");
+		return;
+	}
+	audit_ok = audit_log_user_message(audit_fd, AUDIT_CRYPTO_KEY_USER,
+			buf, NULL, 0, NULL, 1);
+	audit_close(audit_fd);
+	/* do not abort if the error is EPERM and sshd is run as non root user */
+	if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
+		error("cannot write into audit");
+}
 #endif /* USE_LINUX_AUDIT */
diff --git a/openssh-7.2p2/audit.c b/openssh-7.2p2/audit.c
--- a/openssh-7.2p2/audit.c
+++ b/openssh-7.2p2/audit.c
@@ -23,31 +23,38 @@
  * (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 "includes.h"
 
 #include <stdarg.h>
 #include <string.h>
+#include <unistd.h>
 
 #ifdef SSH_AUDIT_EVENTS
 
 #include "audit.h"
 #include "log.h"
 #include "key.h"
 #include "hostfile.h"
 #include "auth.h"
+#include "ssh-gss.h"
+#include "monitor_wrap.h"
+#include "xmalloc.h"
+#include "misc.h"
+#include "servconf.h"
 
 /*
  * Care must be taken when using this since it WILL NOT be initialized when
  * audit_connection_from() is called and MAY NOT be initialized when
  * audit_event(CONNECTION_ABANDON) is called.  Test for NULL before using.
  */
 extern Authctxt *the_authctxt;
+extern ServerOptions options;
 
 /* Maybe add the audit class to struct Authmethod? */
 ssh_audit_event_t
 audit_classify_auth(const char *method)
 {
 	if (strcmp(method, "none") == 0)
 		return SSH_AUTH_FAIL_NONE;
 	else if (strcmp(method, "password") == 0)
@@ -66,23 +73,20 @@ audit_classify_auth(const char *method)
 	else
 		return SSH_AUDIT_UNKNOWN;
 }
 
 /* helper to return supplied username */
 const char *
 audit_username(void)
 {
-	static const char unknownuser[] = "(unknown user)";
-	static const char invaliduser[] = "(invalid user)";
+	static const char unknownuser[] = "(unknown)";
 
-	if (the_authctxt == NULL || the_authctxt->user == NULL)
+	if (the_authctxt == NULL || the_authctxt->user == NULL || !the_authctxt->valid)
 		return (unknownuser);
-	if (!the_authctxt->valid)
-		return (invaliduser);
 	return (the_authctxt->user);
 }
 
 const char *
 audit_event_lookup(ssh_audit_event_t ev)
 {
 	int i;
 	static struct event_lookup_struct {
@@ -106,16 +110,50 @@ audit_event_lookup(ssh_audit_event_t ev)
 	};
 
 	for (i = 0; event_lookup[i].event != SSH_AUDIT_UNKNOWN; i++)
 		if (event_lookup[i].event == ev)
 			break;
 	return(event_lookup[i].name);
 }
 
+void
+audit_key(int host_user, int *rv, const Key *key)
+{
+	char *fp;
+	const char *crypto_name;
+
+	fp = sshkey_fingerprint(key, options.fingerprint_hash, SSH_FP_HEX);
+	if (key->type == KEY_RSA1)
+		crypto_name = "ssh-rsa1";
+	else
+		crypto_name = key_ssh_name(key);
+	if (audit_keyusage(host_user, crypto_name, key_size(key), fp, *rv) == 0)
+		*rv = 0;
+	free(fp);
+}
+
+void
+audit_unsupported(int what)
+{
+	PRIVSEP(audit_unsupported_body(what));
+}
+
+void
+audit_kex(int ctos, char *enc, char *mac, char *comp, char *pfs)
+{
+	PRIVSEP(audit_kex_body(ctos, enc, mac, comp, pfs, getpid(), getuid()));
+}
+
+void
+audit_session_key_free(int ctos)
+{
+	PRIVSEP(audit_session_key_free_body(ctos, getpid(), getuid()));
+}
+
 # ifndef CUSTOM_SSH_AUDIT_EVENTS
 /*
  * Null implementations of audit functions.
  * These get used if SSH_AUDIT_EVENTS is defined but no audit module is enabled.
  */
 
 /*
  * Called after a connection has been accepted but before any authentication
@@ -135,16 +173,27 @@ audit_connection_from(const char *host, 
 void
 audit_event(ssh_audit_event_t event)
 {
 	debug("audit event euid %d user %s event %d (%s)", geteuid(),
 	    audit_username(), event, audit_event_lookup(event));
 }
 
 /*
+ * Called when a child process has called, or will soon call,
+ * audit_session_open.
+ */
+void
+audit_count_session_open(void)
+{
+	debug("audit count session open euid %d user %s", geteuid(),
+	      audit_username());
+}
+
+/*
  * Called when a user session is started.  Argument is the tty allocated to
  * the session, or NULL if no tty was allocated.
  *
  * Note that this may be called multiple times if multiple sessions are used
  * within a single connection.
  */
 void
 audit_session_open(struct logininfo *li)
@@ -169,18 +218,96 @@ audit_session_close(struct logininfo *li
 
 	debug("audit session close euid %d user %s tty name %s", geteuid(),
 	    audit_username(), t);
 }
 
 /*
  * This will be called when a user runs a non-interactive command.  Note that
  * it may be called multiple times for a single connection since SSH2 allows
- * multiple sessions within a single connection.
+ * multiple sessions within a single connection.  Returns a "handle" for
+ * audit_end_command.
  */
-void
+int
 audit_run_command(const char *command)
 {
 	debug("audit run command euid %d user %s command '%.200s'", geteuid(),
 	    audit_username(), command);
+	return 0;
+}
+
+/*
+ * This will be called when the non-interactive command finishes.  Note that
+ * it may be called multiple times for a single connection since SSH2 allows
+ * multiple sessions within a single connection.  "handle" should come from
+ * the corresponding audit_run_command.
+ */
+void
+audit_end_command(int handle, const char *command)
+{
+	debug("audit end nopty exec  euid %d user %s command '%.200s'", geteuid(),
+	    audit_username(), command);
+}
+
+/*
+ * This will be called when user is successfully autherized by the RSA1/RSA/DSA key.
+ *
+ * Type is the key type, len is the key length(byte) and fp is the fingerprint of the key.
+ */
+int
+audit_keyusage(int host_user, const char *type, unsigned bits, char *fp, int rv)
+{
+	debug("audit %s key usage euid %d user %s key type %s key length %d fingerprint %s%s, result %d",
+		host_user ? "pubkey" : "hostbased", geteuid(), audit_username(), type, bits,
+		sshkey_fingerprint_prefix(), fp, rv);
+}
+
+/*
+ * This will be called when the protocol negotiation fails.
+ */
+void
+audit_unsupported_body(int what)
+{
+	debug("audit unsupported protocol euid %d type %d", geteuid(), what);
+}
+
+/*
+ * This will be called on succesfull protocol negotiation.
+ */
+void
+audit_kex_body(int ctos, char *enc, char *mac, char *compress, char *pfs, pid_t pid,
+	       uid_t uid)
+{
+	debug("audit protocol negotiation euid %d direction %d cipher %s mac %s compresion %s pfs %s from pid %ld uid %u",
+		(unsigned)geteuid(), ctos, enc, mac, compress, pfs, (long)pid,
+	        (unsigned)uid);
+}
+
+/*
+ * This will be called on succesfull session key discard
+ */
+void
+audit_session_key_free_body(int ctos, pid_t pid, uid_t uid)
+{
+	debug("audit session key discard euid %u direction %d from pid %ld uid %u",
+		(unsigned)geteuid(), ctos, (long)pid, (unsigned)uid);
+}
+
+/*
+ * This will be called on destroy private part of the server key
+ */
+void
+audit_destroy_sensitive_data(const char *fp, pid_t pid, uid_t uid)
+{
+	debug("audit destroy sensitive data euid %d fingerprint %s from pid %ld uid %u",
+		geteuid(), fp, (long)pid, (unsigned)uid);
+}
+
+/*
+ * This will be called on generation of the ephemeral server key
+ */
+void
+audit_generate_ephemeral_server_key(const char *)
+{
+	debug("audit create ephemeral server key euid %d fingerprint %s", geteuid(), fp);
 }
 # endif  /* !defined CUSTOM_SSH_AUDIT_EVENTS */
 #endif /* SSH_AUDIT_EVENTS */
diff --git a/openssh-7.2p2/audit.h b/openssh-7.2p2/audit.h
--- a/openssh-7.2p2/audit.h
+++ b/openssh-7.2p2/audit.h
@@ -23,16 +23,17 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef _SSH_AUDIT_H
 # define _SSH_AUDIT_H
 
 #include "loginrec.h"
+#include "key.h"
 
 enum ssh_audit_event_type {
 	SSH_LOGIN_EXCEED_MAXTRIES,
 	SSH_LOGIN_ROOT_DENIED,
 	SSH_AUTH_SUCCESS,
 	SSH_AUTH_FAIL_NONE,
 	SSH_AUTH_FAIL_PASSWD,
 	SSH_AUTH_FAIL_KBDINT,	/* keyboard-interactive or challenge-response */
@@ -40,18 +41,38 @@ enum ssh_audit_event_type {
 	SSH_AUTH_FAIL_HOSTBASED,	/* ssh2 hostbased or ssh1 rhostsrsa */
 	SSH_AUTH_FAIL_GSSAPI,
 	SSH_INVALID_USER,
 	SSH_NOLOGIN,		/* denied by /etc/nologin, not implemented */
 	SSH_CONNECTION_CLOSE,	/* closed after attempting auth or session */
 	SSH_CONNECTION_ABANDON,	/* closed without completing auth */
 	SSH_AUDIT_UNKNOWN
 };
+
+enum ssh_audit_kex {
+	SSH_AUDIT_UNSUPPORTED_CIPHER,
+	SSH_AUDIT_UNSUPPORTED_MAC,
+	SSH_AUDIT_UNSUPPORTED_COMPRESSION
+};
 typedef enum ssh_audit_event_type ssh_audit_event_t;
 
+int	listening_for_clients(void);
+
 void	audit_connection_from(const char *, int);
 void	audit_event(ssh_audit_event_t);
+void	audit_count_session_open(void);
 void	audit_session_open(struct logininfo *);
 void	audit_session_close(struct logininfo *);
-void	audit_run_command(const char *);
+int	audit_run_command(const char *);
+void 	audit_end_command(int, const char *);
 ssh_audit_event_t audit_classify_auth(const char *);
+int	audit_keyusage(int, const char *, unsigned, char *, int);
+void	audit_key(int, int *, const Key *);
+void	audit_unsupported(int);
+void	audit_kex(int, char *, char *, char *, char *);
+void	audit_unsupported_body(int);
+void	audit_kex_body(int, char *, char *, char *, char *, pid_t, uid_t);
+void	audit_session_key_free(int ctos);
+void	audit_session_key_free_body(int ctos, pid_t, uid_t);
+void	audit_destroy_sensitive_data(const char *, pid_t, uid_t);
+void	audit_generate_ephemeral_server_key(const char *);
 
 #endif /* _SSH_AUDIT_H */
diff --git a/openssh-7.2p2/auditstub.c b/openssh-7.2p2/auditstub.c
new file mode 100644
--- /dev/null
+++ b/openssh-7.2p2/auditstub.c
@@ -0,0 +1,50 @@
+/* $Id: auditstub.c,v 1.1 jfch Exp $ */
+
+/*
+ * 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 <sys/types.h>
+
+void
+audit_unsupported(int n)
+{
+}
+
+void
+audit_kex(int ctos, char *enc, char *mac, char *comp, char *pfs)
+{
+}
+
+void
+audit_session_key_free(int ctos)
+{
+}
+
+void
+audit_session_key_free_body(int ctos, pid_t pid, uid_t uid)
+{
+}
diff --git a/openssh-7.2p2/auth-rsa.c b/openssh-7.2p2/auth-rsa.c
--- a/openssh-7.2p2/auth-rsa.c
+++ b/openssh-7.2p2/auth-rsa.c
@@ -96,16 +96,20 @@ int
 auth_rsa_verify_response(Key *key, BIGNUM *challenge,
     u_char response[SSH_DIGEST_MAX_LENGTH])
 {
 	u_char buf[2 * SSH_DIGEST_MAX_LENGTH], mdbuf[SSH_DIGEST_MAX_LENGTH];
 	struct ssh_digest_ctx *md;
 	int len;
 	int dgst;
 	size_t dgst_len;
+	int rv;
+#ifdef SSH_AUDIT_EVENTS
+	char *fp;
+#endif
 
 	/* don't allow short keys */
 	if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) {
 		error("%s: RSA modulus too small: %d < minimum %d bits",
 		    __func__,
 		    BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE);
 		return (0);
 	}
@@ -123,22 +127,28 @@ auth_rsa_verify_response(Key *key, BIGNU
 	if ((md = ssh_digest_start(dgst)) == NULL ||
 	    ssh_digest_update(md, buf, 2 * dgst_len) < 0 ||
 	    ssh_digest_update(md, session_id, dgst_len) < 0 ||
 	    ssh_digest_final(md, mdbuf, sizeof(mdbuf)) < 0)
 		fatal("%s: md5 failed", __func__);
 	ssh_digest_free(md);
 
 	/* Verify that the response is the original challenge. */
-	if (timingsafe_bcmp(response, mdbuf, dgst_len) != 0) {
-		/* Wrong answer. */
-		return (0);
-	}
-	/* Correct answer. */
-	return (1);
+	rv = (timingsafe_bcmp(response, mdbuf, dgst_len) == 0);
+
+#ifdef SSH_AUDIT_EVENTS
+	fp = sshkey_fingerprint(key, options.fingerprint_hash, SSH_FP_HEX);
+	if (audit_keyusage(1, "ssh-rsa1", RSA_size(key->rsa) * 8, fp, rv) == 0) {
+		debug("unsuccessful audit");
+		rv = 0;
+ 	}
+	free(fp);
+#endif
+
+	return rv;
 }
 
 /*
  * Performs the RSA authentication challenge-response dialog with the client,
  * and returns true (non-zero) if the client gave the correct answer to
  * our challenge; returns zero if the client gives a wrong answer.
  */
 
diff --git a/openssh-7.2p2/auth.c b/openssh-7.2p2/auth.c
--- a/openssh-7.2p2/auth.c
+++ b/openssh-7.2p2/auth.c
@@ -640,19 +640,16 @@ getpwnamallow(const char *user)
 #endif
 	if (pw == NULL) {
 		logit("Invalid user %.100s from %.100s",
 		    user, get_remote_ipaddr());
 #ifdef CUSTOM_FAILED_LOGIN
 		record_failed_login(user,
 		    get_canonical_hostname(options.use_dns), "ssh");
 #endif
-#ifdef SSH_AUDIT_EVENTS
-		audit_event(SSH_INVALID_USER);
-#endif /* SSH_AUDIT_EVENTS */
 		return (NULL);
 	}
 	if (!allowed_user(pw))
 		return (NULL);
 #ifdef HAVE_LOGIN_CAP
 	if ((lc = login_getclass(pw->pw_class)) == NULL) {
 		debug("unable to get login class: %s", user);
 		return (NULL);
diff --git a/openssh-7.2p2/auth.h b/openssh-7.2p2/auth.h
--- a/openssh-7.2p2/auth.h
+++ b/openssh-7.2p2/auth.h
@@ -187,16 +187,17 @@ int	allowed_user(struct passwd *);
 struct passwd * getpwnamallow(const char *user);
 
 char	*get_challenge(Authctxt *);
 int	verify_response(Authctxt *, const char *);
 void	abandon_challenge_response(Authctxt *);
 
 char	*expand_authorized_keys(const char *, struct passwd *pw);
 char	*authorized_principals_file(struct passwd *);
+int	 user_key_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
 
 FILE	*auth_openkeyfile(const char *, struct passwd *, int);
 FILE	*auth_openprincipals(const char *, struct passwd *, int);
 int	 auth_key_is_revoked(Key *);
 
 HostStatus
 check_key_in_hostfiles(struct passwd *, Key *, const char *,
     const char *, const char *);
@@ -205,16 +206,17 @@ check_key_in_hostfiles(struct passwd *, 
 Key	*get_hostkey_by_index(int);
 Key	*get_hostkey_public_by_index(int, struct ssh *);
 Key	*get_hostkey_public_by_type(int, int, struct ssh *);
 Key	*get_hostkey_private_by_type(int, int, struct ssh *);
 int	 get_hostkey_index(Key *, int, struct ssh *);
 int	 ssh1_session_key(BIGNUM *);
 int	 sshd_hostkey_sign(Key *, Key *, u_char **, size_t *,
 	     const u_char *, size_t, const char *, u_int);
+int	 hostbased_key_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
 
 /* debug messages during authentication */
 void	 auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
 void	 auth_debug_send(void);
 void	 auth_debug_reset(void);
 
 struct passwd *fakepw(void);
 
diff --git a/openssh-7.2p2/auth2-hostbased.c b/openssh-7.2p2/auth2-hostbased.c
--- a/openssh-7.2p2/auth2-hostbased.c
+++ b/openssh-7.2p2/auth2-hostbased.c
@@ -133,33 +133,45 @@ userauth_hostbased(Authctxt *authctxt)
 #endif
 
 	pubkey_auth_info(authctxt, key,
 	    "client user \"%.100s\", client host \"%.100s\"", cuser, chost);
 
 	/* test for allowed key and correct signature */
 	authenticated = 0;
 	if (PRIVSEP(hostbased_key_allowed(authctxt->pw, cuser, chost, key)) &&
-	    PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b),
+	    PRIVSEP(hostbased_key_verify(key, sig, slen, buffer_ptr(&b),
 			buffer_len(&b))) == 1)
 		authenticated = 1;
 
 	buffer_free(&b);
 done:
 	debug2("userauth_hostbased: authenticated %d", authenticated);
 	if (key != NULL)
 		key_free(key);
 	free(pkalg);
 	free(pkblob);
 	free(cuser);
 	free(chost);
 	free(sig);
 	return authenticated;
 }
 
+int
+hostbased_key_verify(const Key *key, const u_char *sig, u_int slen, const u_char *data, u_int datalen)
+{
+	int rv;
+
+	rv = key_verify(key, sig, slen, data, datalen);
+#ifdef SSH_AUDIT_EVENTS
+	audit_key(0, &rv, key);
+#endif
+	return rv;
+}
+
 /* return 1 if given hostkey is allowed */
 int
 hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost,
     Key *key)
 {
 	const char *resolvedname, *ipaddr, *lookup, *reason;
 	HostStatus host_status;
 	int len;
diff --git a/openssh-7.2p2/auth2-pubkey.c b/openssh-7.2p2/auth2-pubkey.c
--- a/openssh-7.2p2/auth2-pubkey.c
+++ b/openssh-7.2p2/auth2-pubkey.c
@@ -171,17 +171,17 @@ userauth_pubkey(Authctxt *authctxt)
 #ifdef DEBUG_PK
 		buffer_dump(&b);
 #endif
 		pubkey_auth_info(authctxt, key, NULL);
 
 		/* test for correct signature */
 		authenticated = 0;
 		if (PRIVSEP(user_key_allowed(authctxt->pw, key, 1)) &&
-		    PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b),
+		    PRIVSEP(user_key_verify(key, sig, slen, buffer_ptr(&b),
 		    buffer_len(&b))) == 1) {
 			authenticated = 1;
 			/* Record the successful key to prevent reuse */
 			auth2_record_userkey(authctxt, key);
 			key = NULL; /* Don't free below */
 		}
 		buffer_free(&b);
 		free(sig);
@@ -251,16 +251,28 @@ pubkey_auth_info(Authctxt *authctxt, con
 		auth_info(authctxt, "%s %s%s%s", key_type(key),
 		    fp == NULL ? "(null)" : fp,
 		    extra == NULL ? "" : ", ", extra == NULL ? "" : extra);
 		free(fp);
 	}
 	free(extra);
 }
 
+int
+user_key_verify(const Key *key, const u_char *sig, u_int slen, const u_char *data, u_int datalen)
+{
+	int rv;
+
+	rv = key_verify(key, sig, slen, data, datalen);
+#ifdef SSH_AUDIT_EVENTS
+	audit_key(1, &rv, key);
+#endif
+	return rv;
+}
+
 /*
  * Splits 's' into an argument vector. Handles quoted string and basic
  * escape characters (\\, \", \'). Caller must free the argument vector
  * and its members.
  */
 static int
 split_argv(const char *s, int *argcp, char ***argvp)
 {
diff --git a/openssh-7.2p2/auth2.c b/openssh-7.2p2/auth2.c
--- a/openssh-7.2p2/auth2.c
+++ b/openssh-7.2p2/auth2.c
@@ -236,19 +236,16 @@ input_userauth_request(int type, u_int32
 		authctxt->pw = PRIVSEP(getpwnamallow(user));
 		authctxt->user = xstrdup(user);
 		if (authctxt->pw && strcmp(service, "ssh-connection")==0) {
 			authctxt->valid = 1;
 			debug2("input_userauth_request: setting up authctxt for %s", user);
 		} else {
 			logit("input_userauth_request: invalid user %s", user);
 			authctxt->pw = fakepw();
-#ifdef SSH_AUDIT_EVENTS
-			PRIVSEP(audit_event(SSH_INVALID_USER));
-#endif
 		}
 #ifdef USE_PAM
 		if (options.use_pam)
 			PRIVSEP(start_pam(authctxt));
 #endif
 		setproctitle("%s%s", authctxt->valid ? user : "unknown",
 		    use_privsep ? " [net]" : "");
 		authctxt->service = xstrdup(service);
diff --git a/openssh-7.2p2/cipher.c b/openssh-7.2p2/cipher.c
--- a/openssh-7.2p2/cipher.c
+++ b/openssh-7.2p2/cipher.c
@@ -55,36 +55,16 @@
 #include "log.h"
 
 #ifdef WITH_SSH1
 extern const EVP_CIPHER *evp_ssh1_bf(void);
 extern const EVP_CIPHER *evp_ssh1_3des(void);
 extern int ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int);
 #endif
 
-struct sshcipher {
-	char	*name;
-	int	number;		/* for ssh1 only */
-	u_int	block_size;
-	u_int	key_len;
-	u_int	iv_len;		/* defaults to block_size */
-	u_int	auth_len;
-	u_int	discard_len;
-	u_int	flags;
-#define CFLAG_CBC		(1<<0)
-#define CFLAG_CHACHAPOLY	(1<<1)
-#define CFLAG_AESCTR		(1<<2)
-#define CFLAG_NONE		(1<<3)
-#ifdef WITH_OPENSSL
-	const EVP_CIPHER	*(*evptype)(void);
-#else
-	void	*ignored;
-#endif
-};
-
 static const struct sshcipher ciphers_all[] = {
 #ifdef WITH_SSH1
 	{ "des",	SSH_CIPHER_DES, 8, 8, 0, 0, 0, 1, EVP_des_cbc },
 	{ "3des",	SSH_CIPHER_3DES, 8, 16, 0, 0, 0, 1, evp_ssh1_3des },
 	{ "blowfish",	SSH_CIPHER_BLOWFISH, 8, 32, 0, 0, 0, 1, evp_ssh1_bf },
 #endif /* WITH_SSH1 */
 #ifdef WITH_OPENSSL
 	{ "none",	SSH_CIPHER_NONE, 8, 0, 0, 0, 0, 0, EVP_enc_null },
diff --git a/openssh-7.2p2/cipher.h b/openssh-7.2p2/cipher.h
--- a/openssh-7.2p2/cipher.h
+++ b/openssh-7.2p2/cipher.h
@@ -57,17 +57,36 @@
 #define SSH_CIPHER_BROKEN_RC4	5	/* Alleged RC4 */
 #define SSH_CIPHER_BLOWFISH	6
 #define SSH_CIPHER_RESERVED	7
 #define SSH_CIPHER_MAX		31
 
 #define CIPHER_ENCRYPT		1
 #define CIPHER_DECRYPT		0
 
-struct sshcipher;
+struct sshcipher {
+	char	*name;
+	int	number;		/* for ssh1 only */
+	u_int	block_size;
+	u_int	key_len;
+	u_int	iv_len;		/* defaults to block_size */
+	u_int	auth_len;
+	u_int	discard_len;
+	u_int	flags;
+#define CFLAG_CBC		(1<<0)
+#define CFLAG_CHACHAPOLY	(1<<1)
+#define CFLAG_AESCTR		(1<<2)
+#define CFLAG_NONE		(1<<3)
+#ifdef WITH_OPENSSL
+	const EVP_CIPHER	*(*evptype)(void);
+#else
+	void	*ignored;
+#endif
+};
+
 struct sshcipher_ctx {
 	int	plaintext;
 	int	encrypt;
 	EVP_CIPHER_CTX evp;
 	struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
 	struct aesctr_ctx ac_ctx; /* XXX union with evp? */
 	const struct sshcipher *cipher;
 };
diff --git a/openssh-7.2p2/kex.c b/openssh-7.2p2/kex.c
--- a/openssh-7.2p2/kex.c
+++ b/openssh-7.2p2/kex.c
@@ -48,16 +48,17 @@
 #include "match.h"
 #include "misc.h"
 #include "dispatch.h"
 #include "monitor.h"
 
 #include "ssherr.h"
 #include "sshbuf.h"
 #include "digest.h"
+#include "audit.h"
 
 #include "fips.h"
 
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 
 #if OPENSSL_VERSION_NUMBER >= 0x00907000L
@@ -687,18 +688,22 @@ kex_start_rekex(struct ssh *ssh)
 	return kex_send_kexinit(ssh);
 }
 
 static int
 choose_enc(struct sshenc *enc, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
-	if (name == NULL)
+	if (name == NULL) {
+#ifdef SSH_AUDIT_EVENTS
+		audit_unsupported(SSH_AUDIT_UNSUPPORTED_CIPHER);
+#endif
 		return SSH_ERR_NO_CIPHER_ALG_MATCH;
+	}
 	if ((enc->cipher = cipher_by_name(name)) == NULL)
 		return SSH_ERR_INTERNAL_ERROR;
 	enc->name = name;
 	enc->enabled = 0;
 	enc->iv = NULL;
 	enc->iv_len = cipher_ivlen(enc->cipher);
 	enc->key = NULL;
 	enc->key_len = cipher_keylen(enc->cipher);
@@ -706,36 +711,44 @@ choose_enc(struct sshenc *enc, char *cli
 	return 0;
 }
 
 static int
 choose_mac(struct ssh *ssh, struct sshmac *mac, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
-	if (name == NULL)
+	if (name == NULL) {
+#ifdef SSH_AUDIT_EVENTS
+		audit_unsupported(SSH_AUDIT_UNSUPPORTED_MAC);
+#endif
 		return SSH_ERR_NO_MAC_ALG_MATCH;
+	}
 	if (mac_setup(mac, name) < 0)
 		return SSH_ERR_INTERNAL_ERROR;
 	/* truncate the key */
 	if (ssh->compat & SSH_BUG_HMAC)
 		mac->key_len = 16;
 	mac->name = name;
 	mac->key = NULL;
 	mac->enabled = 0;
 	return 0;
 }
 
 static int
 choose_comp(struct sshcomp *comp, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
-	if (name == NULL)
+	if (name == NULL) {
+#ifdef SSH_AUDIT_EVENTS
+		audit_unsupported(SSH_AUDIT_UNSUPPORTED_COMPRESSION);
+#endif
 		return SSH_ERR_NO_COMPRESS_ALG_MATCH;
+	}
 	if (strcmp(name, "zlib@openssh.com") == 0) {
 		comp->type = COMP_DELAYED;
 	} else if (strcmp(name, "zlib") == 0) {
 		comp->type = COMP_ZLIB;
 	} else if (strcmp(name, "none") == 0) {
 		comp->type = COMP_NONE;
 	} else {
 		return SSH_ERR_INTERNAL_ERROR;
@@ -896,16 +909,20 @@ kex_choose_conf(struct ssh *ssh)
 		need = MAX(need, newkeys->enc.key_len);
 		need = MAX(need, newkeys->enc.block_size);
 		need = MAX(need, newkeys->enc.iv_len);
 		need = MAX(need, newkeys->mac.key_len);
 		dh_need = MAX(dh_need, cipher_seclen(newkeys->enc.cipher));
 		dh_need = MAX(dh_need, newkeys->enc.block_size);
 		dh_need = MAX(dh_need, newkeys->enc.iv_len);
 		dh_need = MAX(dh_need, newkeys->mac.key_len);
+		debug("kex: %s need=%d dh_need=%d", kex->name, need, dh_need);
+#ifdef SSH_AUDIT_EVENTS
+		audit_kex(mode, newkeys->enc.name, newkeys->mac.name, newkeys->comp.name, kex->name);
+#endif
 	}
 	/* XXX need runden? */
 	kex->we_need = need;
 	kex->dh_need = dh_need;
 
 	/* ignore the next message if the proposals do not match */
 	if (first_kex_follows && !proposals_match(my, peer) &&
 	    !(ssh->compat & SSH_BUG_FIRSTKEX))
@@ -1072,8 +1089,38 @@ derive_ssh1_session_id(BIGNUM *host_modu
 #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH)
 void
 dump_digest(char *msg, u_char *digest, int len)
 {
 	fprintf(stderr, "%s\n", msg);
 	sshbuf_dump_data(digest, len, stderr);
 }
 #endif
+
+static void
+enc_destroy(struct sshenc *enc)
+{
+	if (enc == NULL)
+		return;
+
+	if (enc->key) {
+		memset(enc->key, 0, enc->key_len);
+		free(enc->key);
+	}
+
+	if (enc->iv) {
+		memset(enc->iv,  0, enc->iv_len);
+		free(enc->iv);
+	}
+
+	memset(enc, 0, sizeof(*enc));
+}
+
+void
+newkeys_destroy(struct newkeys *newkeys)
+{
+	if (newkeys == NULL)
+		return;
+
+	enc_destroy(&newkeys->enc);
+	mac_destroy(&newkeys->mac);
+	memset(&newkeys->comp, 0, sizeof(newkeys->comp));
+}
diff --git a/openssh-7.2p2/kex.h b/openssh-7.2p2/kex.h
--- a/openssh-7.2p2/kex.h
+++ b/openssh-7.2p2/kex.h
@@ -199,16 +199,18 @@ int	 kexecdh_server(struct ssh *);
 int	 kexc25519_client(struct ssh *);
 int	 kexc25519_server(struct ssh *);
  
 #ifdef GSSAPI
 int	 kexgss_client(struct ssh *);
 int	 kexgss_server(struct ssh *);
 #endif
 
+void	newkeys_destroy(struct newkeys *newkeys);
+
 int	 kex_dh_hash(const char *, const char *,
     const u_char *, size_t, const u_char *, size_t, const u_char *, size_t,
     const BIGNUM *, const BIGNUM *, const BIGNUM *, u_char *, size_t *);
 
 int	 kexgex_hash(int, const char *, const char *,
     const u_char *, size_t, const u_char *, size_t, const u_char *, size_t,
     int, int, int,
     const BIGNUM *, const BIGNUM *, const BIGNUM *,
diff --git a/openssh-7.2p2/key.h b/openssh-7.2p2/key.h
--- a/openssh-7.2p2/key.h
+++ b/openssh-7.2p2/key.h
@@ -45,16 +45,17 @@ typedef struct sshkey Key;
 #define key_ssh_name_plain	sshkey_ssh_name_plain
 #define key_type_from_name	sshkey_type_from_name
 #define key_ecdsa_nid_from_name	sshkey_ecdsa_nid_from_name
 #define key_type_is_cert	sshkey_type_is_cert
 #define key_size		sshkey_size
 #define key_ecdsa_bits_to_nid	sshkey_ecdsa_bits_to_nid
 #define key_ecdsa_key_to_nid	sshkey_ecdsa_key_to_nid
 #define key_is_cert		sshkey_is_cert
+#define key_is_private		sshkey_is_private
 #define key_type_plain		sshkey_type_plain
 #define key_curve_name_to_nid	sshkey_curve_name_to_nid
 #define key_curve_nid_to_bits	sshkey_curve_nid_to_bits
 #define key_curve_nid_to_name	sshkey_curve_nid_to_name
 #define key_ec_nid_to_hash_alg	sshkey_ec_nid_to_hash_alg
 #define key_dump_ec_point	sshkey_dump_ec_point
 #define key_dump_ec_key		sshkey_dump_ec_key
 #endif
diff --git a/openssh-7.2p2/mac.c b/openssh-7.2p2/mac.c
--- a/openssh-7.2p2/mac.c
+++ b/openssh-7.2p2/mac.c
@@ -259,16 +259,30 @@ mac_clear(struct sshmac *mac)
 		if (mac->umac_ctx != NULL)
 			umac128_delete(mac->umac_ctx);
 	} else if (mac->hmac_ctx != NULL)
 		ssh_hmac_free(mac->hmac_ctx);
 	mac->hmac_ctx = NULL;
 	mac->umac_ctx = NULL;
 }
 
+void
+mac_destroy(struct sshmac *mac)
+{
+	if (mac == NULL)
+		return;
+
+	if (mac->key) {
+		memset(mac->key, 0, mac->key_len);
+		free(mac->key);
+	}
+
+	memset(mac, 0, sizeof(*mac));
+}
+
 /* XXX copied from ciphers_valid */
 #define	MAC_SEP	","
 int
 mac_valid(const char *names)
 {
 	char *maclist, *cp, *p;
 
 	if (names == NULL || strcmp(names, "") == 0)
diff --git a/openssh-7.2p2/mac.h b/openssh-7.2p2/mac.h
--- a/openssh-7.2p2/mac.h
+++ b/openssh-7.2p2/mac.h
@@ -42,10 +42,11 @@ struct sshmac {
 
 int	 mac_valid(const char *);
 char	*mac_alg_list(char);
 int	 mac_setup(struct sshmac *, char *);
 int	 mac_init(struct sshmac *);
 int	 mac_compute(struct sshmac *, u_int32_t, const u_char *, int,
     u_char *, size_t);
 void	 mac_clear(struct sshmac *);
+void	 mac_destroy(struct sshmac *);
 
 #endif /* SSHMAC_H */
diff --git a/openssh-7.2p2/monitor.c b/openssh-7.2p2/monitor.c
--- a/openssh-7.2p2/monitor.c
+++ b/openssh-7.2p2/monitor.c
@@ -96,31 +96,34 @@
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 #include "monitor_wrap.h"
 #include "monitor_fdpass.h"
 #include "compat.h"
 #include "ssh2.h"
 #include "authfd.h"
+#include "audit.h"
 #include "match.h"
 #include "ssherr.h"
 
 #ifdef GSSAPI
 static Gssctxt *gsscontext = NULL;
 #endif
 
 /* Imports */
 extern ServerOptions options;
 extern u_int utmp_len;
 extern u_char session_id[];
 extern Buffer auth_debug;
 extern int auth_debug_init;
 extern Buffer loginmsg;
 
+extern void destroy_sensitive_data(int);
+
 /* State exported from the child */
 static struct sshbuf *child_state;
 
 /* Functions on the monitor that answer unprivileged requests */
 
 int mm_answer_moduli(int, Buffer *);
 int mm_answer_sign(int, Buffer *);
 int mm_answer_pwnamallow(int, Buffer *);
@@ -158,16 +161,21 @@ int mm_answer_gss_userok(int, Buffer *);
 int mm_answer_gss_checkmic(int, Buffer *);
 int mm_answer_gss_sign(int, Buffer *);
 int mm_answer_gss_updatecreds(int, Buffer *);
 #endif
 
 #ifdef SSH_AUDIT_EVENTS
 int mm_answer_audit_event(int, Buffer *);
 int mm_answer_audit_command(int, Buffer *);
+int mm_answer_audit_end_command(int, Buffer *);
+int mm_answer_audit_unsupported_body(int, Buffer *);
+int mm_answer_audit_kex_body(int, Buffer *);
+int mm_answer_audit_session_key_free_body(int, Buffer *);
+int mm_answer_audit_server_key_free(int, Buffer *);
 #endif
 
 static int monitor_read_log(struct monitor *);
 
 static Authctxt *authctxt;
 
 #ifdef WITH_SSH1
 static BIGNUM *ssh1_challenge = NULL;	/* used for ssh1 rsa auth */
@@ -214,16 +222,20 @@ struct mon_table mon_dispatch_proto20[] 
     {MONITOR_REQ_PAM_ACCOUNT, 0, mm_answer_pam_account},
     {MONITOR_REQ_PAM_INIT_CTX, MON_ISAUTH, mm_answer_pam_init_ctx},
     {MONITOR_REQ_PAM_QUERY, MON_ISAUTH, mm_answer_pam_query},
     {MONITOR_REQ_PAM_RESPOND, MON_ISAUTH, mm_answer_pam_respond},
     {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx},
 #endif
 #ifdef SSH_AUDIT_EVENTS
     {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
+    {MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
+    {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+    {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
 #endif
 #ifdef BSD_AUTH
     {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
     {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH, mm_answer_bsdauthrespond},
 #endif
 #ifdef SKEY
     {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery},
     {MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond},
@@ -252,16 +264,21 @@ struct mon_table mon_dispatch_postauth20
 #endif
     {MONITOR_REQ_SIGN, 0, mm_answer_sign},
     {MONITOR_REQ_PTY, 0, mm_answer_pty},
     {MONITOR_REQ_PTYCLEANUP, 0, mm_answer_pty_cleanup},
     {MONITOR_REQ_TERM, 0, mm_answer_term},
 #ifdef SSH_AUDIT_EVENTS
     {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
     {MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT, mm_answer_audit_command},
+    {MONITOR_REQ_AUDIT_END_COMMAND, MON_PERMIT, mm_answer_audit_end_command},
+    {MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
+    {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+    {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
 #endif
     {0, 0, NULL}
 };
 
 struct mon_table mon_dispatch_proto15[] = {
 #ifdef WITH_SSH1
     {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow},
     {MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey},
@@ -284,29 +301,38 @@ struct mon_table mon_dispatch_proto15[] 
     {MONITOR_REQ_PAM_ACCOUNT, 0, mm_answer_pam_account},
     {MONITOR_REQ_PAM_INIT_CTX, MON_ISAUTH, mm_answer_pam_init_ctx},
     {MONITOR_REQ_PAM_QUERY, MON_ISAUTH, mm_answer_pam_query},
     {MONITOR_REQ_PAM_RESPOND, MON_ISAUTH, mm_answer_pam_respond},
     {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx},
 #endif
 #ifdef SSH_AUDIT_EVENTS
     {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
+    {MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
+    {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+    {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
 #endif
 #endif /* WITH_SSH1 */
     {0, 0, NULL}
 };
 
 struct mon_table mon_dispatch_postauth15[] = {
 #ifdef WITH_SSH1
     {MONITOR_REQ_PTY, MON_ONCE, mm_answer_pty},
     {MONITOR_REQ_PTYCLEANUP, MON_ONCE, mm_answer_pty_cleanup},
     {MONITOR_REQ_TERM, 0, mm_answer_term},
 #ifdef SSH_AUDIT_EVENTS
     {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
     {MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT|MON_ONCE, mm_answer_audit_command},
+    {MONITOR_REQ_AUDIT_END_COMMAND, MON_PERMIT, mm_answer_audit_end_command},
+    {MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
+    {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+    {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
 #endif
 #endif /* WITH_SSH1 */
     {0, 0, NULL}
 };
 
 struct mon_table *mon_dispatch;
 
 /* Specifies if a certain message is allowed at the moment */
@@ -1423,26 +1449,30 @@ monitor_valid_hostbasedblob(u_char *data
 }
 
 int
 mm_answer_keyverify(int sock, Buffer *m)
 {
 	Key *key;
 	u_char *signature, *data, *blob;
 	u_int signaturelen, datalen, bloblen;
+	int type = 0;
 	int verified = 0;
 	int valid_data = 0;
 
+	type = buffer_get_int(m);
 	blob = buffer_get_string(m, &bloblen);
 	signature = buffer_get_string(m, &signaturelen);
 	data = buffer_get_string(m, &datalen);
 
 	if (hostbased_cuser == NULL || hostbased_chost == NULL ||
 	  !monitor_allowed_key(blob, bloblen))
 		fatal("%s: bad key, not previously allowed", __func__);
+	if (type != key_blobtype)
+		fatal("%s: bad key type", __func__);
 
 	key = key_from_blob(blob, bloblen);
 	if (key == NULL)
 		fatal("%s: bad public key blob", __func__);
 
 	switch (key_blobtype) {
 	case MM_USERKEY:
 		valid_data = monitor_valid_userblob(data, datalen);
@@ -1453,17 +1483,27 @@ mm_answer_keyverify(int sock, Buffer *m)
 		break;
 	default:
 		valid_data = 0;
 		break;
 	}
 	if (!valid_data)
 		fatal("%s: bad signature data blob", __func__);
 
-	verified = key_verify(key, signature, signaturelen, data, datalen);
+	switch (key_blobtype) {
+	case MM_USERKEY:
+		verified = user_key_verify(key, signature, signaturelen, data, datalen);
+		break;
+	case MM_HOSTKEY:
+		verified = hostbased_key_verify(key, signature, signaturelen, data, datalen);
+		break;
+	default:
+		verified = 0;
+		break;
+	}
 	debug3("%s: key %p signature %s",
 	    __func__, key, (verified == 1) ? "verified" : "unverified");
 
 	/* If auth was successful then record key to ensure it isn't reused */
 	if (verified == 1 && key_blobtype == MM_USERKEY)
 		auth2_record_userkey(authctxt, key);
 	else
 		key_free(key);
@@ -1514,16 +1554,22 @@ mm_record_login(Session *s, struct passw
 static void
 mm_session_close(Session *s)
 {
 	debug3("%s: session %d pid %ld", __func__, s->self, (long)s->pid);
 	if (s->ttyfd != -1) {
 		debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd);
 		session_pty_cleanup2(s);
 	}
+#ifdef SSH_AUDIT_EVENTS
+	if (s->command != NULL) {
+		debug3("%s: command %d", __func__, s->command_handle);
+		session_end_command2(s);
+	}
+#endif
 	session_unused(s->self);
 }
 
 int
 mm_answer_pty(int sock, Buffer *m)
 {
 	extern struct monitor *pmonitor;
 	Session *s;
@@ -1796,16 +1842,18 @@ mm_answer_term(int sock, Buffer *req)
 	/* The child is terminating */
 	session_destroy_all(&mm_session_close);
 
 #ifdef USE_PAM
 	if (options.use_pam)
 		sshpam_cleanup();
 #endif
 
+	destroy_sensitive_data(0);
+
 	while (waitpid(pmonitor->m_pid, &status, 0) == -1)
 		if (errno != EINTR)
 			exit(1);
 
 	res = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
 
 	/* Terminate process */
 	exit(res);
@@ -1838,21 +1886,53 @@ mm_answer_audit_event(int socket, Buffer
 	return (0);
 }
 
 int
 mm_answer_audit_command(int socket, Buffer *m)
 {
 	u_int len;
 	char *cmd;
+	Session *s;
 
 	debug3("%s entering", __func__);
 	cmd = buffer_get_string(m, &len);
+
 	/* sanity check command, if so how? */
-	audit_run_command(cmd);
+	s = session_new();
+	if (s == NULL)
+		fatal("%s: error allocating a session", __func__);
+	s->command = cmd;
+	s->command_handle = audit_run_command(cmd);
+
+	buffer_clear(m);
+	buffer_put_int(m, s->self);
+
+	mm_request_send(socket, MONITOR_ANS_AUDIT_COMMAND, m);
+
+	return (0);
+}
+
+int
+mm_answer_audit_end_command(int socket, Buffer *m)
+{
+	int handle;
+	u_int len;
+	char *cmd;
+	Session *s;
+
+	debug3("%s entering", __func__);
+	handle = buffer_get_int(m);
+	cmd = buffer_get_string(m, &len);
+
+	s = session_by_id(handle);
+	if (s == NULL || s->ttyfd != -1 || s->command == NULL ||
+	    strcmp(s->command, cmd) != 0)
+		fatal("%s: invalid handle", __func__);
+	mm_session_close(s);
 	free(cmd);
 	return (0);
 }
 #endif /* SSH_AUDIT_EVENTS */
 
 void
 monitor_apply_keystate(struct monitor *pmonitor)
 {
@@ -1899,23 +1979,39 @@ monitor_apply_keystate(struct monitor *p
 	}
 }
 
 /* This function requries careful sanity checking */
 
 void
 mm_get_keystate(struct monitor *pmonitor)
 {
+	Buffer m;
 	debug3("%s: Waiting for new keys", __func__);
 
 	if ((child_state = sshbuf_new()) == NULL)
 		fatal("%s: sshbuf_new failed", __func__);
 	mm_request_receive_expect(pmonitor->m_sendfd, MONITOR_REQ_KEYEXPORT,
 	    child_state);
 	debug3("%s: GOT new keys", __func__);
+
+#ifdef SSH_AUDIT_EVENTS
+	if (compat20) {
+		buffer_init(&m);
+		mm_request_receive_expect(pmonitor->m_sendfd,
+					  MONITOR_REQ_AUDIT_SESSION_KEY_FREE, &m);
+		mm_answer_audit_session_key_free_body(pmonitor->m_sendfd, &m);
+		buffer_free(&m);
+	}
+#endif
+
+	/* Drain any buffered messages from the child */
+	while (pmonitor->m_log_recvfd >= 0 && monitor_read_log(pmonitor) == 0)
+		;
+
 }
 
 
 /* XXX */
 
 #define FD_CLOSEONEXEC(x) do { \
 	if (fcntl(x, F_SETFD, FD_CLOEXEC) == -1) \
 		fatal("fcntl(%d, F_SETFD)", x); \
@@ -2157,8 +2253,91 @@ mm_answer_gss_updatecreds(int socket, Bu
 
 	mm_request_send(socket, MONITOR_ANS_GSSUPCREDS, m);
 
 	return(0);
 }
 
 #endif /* GSSAPI */
 
+#ifdef SSH_AUDIT_EVENTS
+int
+mm_answer_audit_unsupported_body(int sock, Buffer *m)
+{
+	int what;
+
+	what = buffer_get_int(m);
+
+	audit_unsupported_body(what);
+
+	buffer_clear(m);
+
+	mm_request_send(sock, MONITOR_ANS_AUDIT_UNSUPPORTED, m);
+	return 0;
+}
+
+int
+mm_answer_audit_kex_body(int sock, Buffer *m)
+{
+	int ctos, len;
+	char *cipher, *mac, *compress, *pfs;
+	pid_t pid;
+	uid_t uid;
+
+	ctos = buffer_get_int(m);
+	cipher = buffer_get_string(m, &len);
+	mac = buffer_get_string(m, &len);
+	compress = buffer_get_string(m, &len);
+	pfs = buffer_get_string(m, &len);
+	pid = buffer_get_int64(m);
+	uid = buffer_get_int64(m);
+
+	audit_kex_body(ctos, cipher, mac, compress, pfs, pid, uid);
+
+	free(cipher);
+	free(mac);
+	free(compress);
+	free(pfs);
+	buffer_clear(m);
+
+	mm_request_send(sock, MONITOR_ANS_AUDIT_KEX, m);
+	return 0;
+}
+
+int
+mm_answer_audit_session_key_free_body(int sock, Buffer *m)
+{
+	int ctos;
+	pid_t pid;
+	uid_t uid;
+
+	ctos = buffer_get_int(m);
+	pid = buffer_get_int64(m);
+	uid = buffer_get_int64(m);
+
+	audit_session_key_free_body(ctos, pid, uid);
+
+	buffer_clear(m);
+
+	mm_request_send(sock, MONITOR_ANS_AUDIT_SESSION_KEY_FREE, m);
+	return 0;
+}
+
+int
+mm_answer_audit_server_key_free(int sock, Buffer *m)
+{
+	int len;
+	char *fp;
+	pid_t pid;
+	uid_t uid;
+
+	fp = buffer_get_string(m, &len);
+	pid = buffer_get_int64(m);
+	uid = buffer_get_int64(m);
+
+	audit_destroy_sensitive_data(fp, pid, uid);
+
+	free(fp);
+	buffer_clear(m);
+
+	return 0;
+}
+#endif /* SSH_AUDIT_EVENTS */
diff --git a/openssh-7.2p2/monitor.h b/openssh-7.2p2/monitor.h
--- a/openssh-7.2p2/monitor.h
+++ b/openssh-7.2p2/monitor.h
@@ -58,17 +58,23 @@ enum monitor_reqtype {
 	MONITOR_REQ_TERM = 50,
 
 	MONITOR_REQ_PAM_START = 100,
 	MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103,
 	MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105,
 	MONITOR_REQ_PAM_QUERY = 106, MONITOR_ANS_PAM_QUERY = 107,
 	MONITOR_REQ_PAM_RESPOND = 108, MONITOR_ANS_PAM_RESPOND = 109,
 	MONITOR_REQ_PAM_FREE_CTX = 110, MONITOR_ANS_PAM_FREE_CTX = 111,
-	MONITOR_REQ_AUDIT_EVENT = 112, MONITOR_REQ_AUDIT_COMMAND = 113,
+	MONITOR_REQ_AUDIT_EVENT = 112,
+	MONITOR_REQ_AUDIT_COMMAND = 114, MONITOR_ANS_AUDIT_COMMAND = 115,
+	MONITOR_REQ_AUDIT_END_COMMAND = 116,
+	MONITOR_REQ_AUDIT_UNSUPPORTED = 118, MONITOR_ANS_AUDIT_UNSUPPORTED = 119,
+	MONITOR_REQ_AUDIT_KEX = 120, MONITOR_ANS_AUDIT_KEX = 121,
+	MONITOR_REQ_AUDIT_SESSION_KEY_FREE = 122, MONITOR_ANS_AUDIT_SESSION_KEY_FREE = 123,
+	MONITOR_REQ_AUDIT_SERVER_KEY_FREE = 124,
 
 	MONITOR_REQ_GSSSIGN = 201, MONITOR_ANS_GSSSIGN = 202,
 	MONITOR_REQ_GSSUPCREDS = 203, MONITOR_ANS_GSSUPCREDS = 204,
 
 };
 
 struct mm_master;
 struct monitor {
diff --git a/openssh-7.2p2/monitor_wrap.c b/openssh-7.2p2/monitor_wrap.c
--- a/openssh-7.2p2/monitor_wrap.c
+++ b/openssh-7.2p2/monitor_wrap.c
@@ -438,30 +438,31 @@ mm_key_allowed(enum mm_keytype type, cha
 
 /*
  * This key verify needs to send the key type along, because the
  * privileged parent makes the decision if the key is allowed
  * for authentication.
  */
 
 int
-mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
+mm_key_verify(enum mm_keytype type, Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
 {
 	Buffer m;
 	u_char *blob;
 	u_int len;
 	int verified = 0;
 
 	debug3("%s entering", __func__);
 
 	/* Convert the key to a blob and the pass it over */
 	if (!key_to_blob(key, &blob, &len))
 		return (0);
 
 	buffer_init(&m);
+	buffer_put_int(&m, type);
 	buffer_put_string(&m, blob, len);
 	buffer_put_string(&m, sig, siglen);
 	buffer_put_string(&m, data, datalen);
 	free(blob);
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
 
 	debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
@@ -469,16 +470,28 @@ mm_key_verify(Key *key, u_char *sig, u_i
 
 	verified = buffer_get_int(&m);
 
 	buffer_free(&m);
 
 	return (verified);
 }
 
+int
+mm_hostbased_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
+{
+	return mm_key_verify(MM_HOSTKEY, key, sig, siglen, data, datalen);
+}
+
+int
+mm_user_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
+{
+	return mm_key_verify(MM_USERKEY, key, sig, siglen, data, datalen);
+}
+
 void
 mm_send_keystate(struct monitor *monitor)
 {
 	struct ssh *ssh = active_state;		/* XXX */
 	struct sshbuf *m;
 	int r;
 
 	if ((m = sshbuf_new()) == NULL)
@@ -981,27 +994,48 @@ mm_audit_event(ssh_audit_event_t event)
 
 	buffer_init(&m);
 	buffer_put_int(&m, event);
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
 	buffer_free(&m);
 }
 
-void
+int
 mm_audit_run_command(const char *command)
 {
 	Buffer m;
+	int handle;
 
 	debug3("%s entering command %s", __func__, command);
 
 	buffer_init(&m);
 	buffer_put_cstring(&m, command);
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_COMMAND, &m);
+
+	handle = buffer_get_int(&m);
+	buffer_free(&m);
+
+	return (handle);
+}
+
+void
+mm_audit_end_command(int handle, const char *command)
+{
+	Buffer m;
+
+	debug3("%s entering command %s", __func__, command);
+
+	buffer_init(&m);
+	buffer_put_int(&m, handle);
+	buffer_put_cstring(&m, command);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_END_COMMAND, &m);
 	buffer_free(&m);
 }
 #endif /* SSH_AUDIT_EVENTS */
 
 #ifdef GSSAPI
 OM_uint32
 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
 {
@@ -1127,8 +1161,119 @@ mm_ssh_gssapi_update_creds(ssh_gssapi_cc
 
 	buffer_free(&m);
 	
 	return (ok);
 }
 
 #endif /* GSSAPI */
 
+#ifdef SSH_AUDIT_EVENTS
+void
+mm_audit_unsupported_body(int what)
+{
+	Buffer m;
+
+	buffer_init(&m);
+	buffer_put_int(&m, what);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_UNSUPPORTED, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_UNSUPPORTED,
+				  &m);
+
+	buffer_free(&m);
+}
+
+void
+mm_audit_kex_body(int ctos, char *cipher, char *mac, char *compress, char *fps, pid_t pid,
+		  uid_t uid)
+{
+	Buffer m;
+
+	buffer_init(&m);
+	buffer_put_int(&m, ctos);
+	buffer_put_cstring(&m, cipher);
+	buffer_put_cstring(&m, (mac ? mac : "<implicit>"));
+	buffer_put_cstring(&m, compress);
+	buffer_put_cstring(&m, fps);
+	buffer_put_int64(&m, pid);
+	buffer_put_int64(&m, uid);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_KEX, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_KEX,
+				  &m);
+
+	buffer_free(&m);
+}
+
+void
+mm_audit_session_key_free_body(int ctos, pid_t pid, uid_t uid)
+{
+	Buffer m;
+
+	buffer_init(&m);
+	buffer_put_int(&m, ctos);
+	buffer_put_int64(&m, pid);
+	buffer_put_int64(&m, uid);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_SESSION_KEY_FREE, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_SESSION_KEY_FREE,
+				  &m);
+	buffer_free(&m);
+}
+
+void
+mm_audit_destroy_sensitive_data(const char *fp, pid_t pid, uid_t uid)
+{
+	Buffer m;
+
+	buffer_init(&m);
+	buffer_put_cstring(&m, fp);
+	buffer_put_int64(&m, pid);
+	buffer_put_int64(&m, uid);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_SERVER_KEY_FREE, &m);
+	buffer_free(&m);
+}
+
+int mm_forward_audit_messages(int fdin)
+{
+	u_char buf[4];
+	u_int blen, msg_len;
+	Buffer m;
+	int ret = 0;
+
+	debug3("%s: entering", __func__);
+	buffer_init(&m);
+	do {
+		blen = atomicio(read, fdin, buf, sizeof(buf));
+		if (blen == 0) /* closed pipe */
+			break;
+		if (blen != sizeof(buf)) {
+			error("%s: Failed to read the buffer from child", __func__);
+			ret = -1;
+			break;
+		}
+
+		msg_len = get_u32(buf);
+		if (msg_len > 256 * 1024)
+			fatal("%s: read: bad msg_len %d", __func__, msg_len);
+		buffer_clear(&m);
+		buffer_append_space(&m, msg_len);
+		if (atomicio(read, fdin, buffer_ptr(&m), msg_len) != msg_len) {
+			error("%s: Failed to read the the buffer conent from the child", __func__);
+			ret = -1;
+			break;
+		}
+		if (atomicio(vwrite, pmonitor->m_recvfd, buf, blen) != blen || 
+		    atomicio(vwrite, pmonitor->m_recvfd, buffer_ptr(&m), msg_len) != msg_len) {
+			error("%s: Failed to write the messag to the monitor", __func__);
+			ret = -1;
+			break;
+		}
+	} while (1);
+	buffer_free(&m);
+	return ret;
+}
+void mm_set_monitor_pipe(int fd)
+{
+	pmonitor->m_recvfd = fd;
+}
+#endif /* SSH_AUDIT_EVENTS */
diff --git a/openssh-7.2p2/monitor_wrap.h b/openssh-7.2p2/monitor_wrap.h
--- a/openssh-7.2p2/monitor_wrap.h
+++ b/openssh-7.2p2/monitor_wrap.h
@@ -44,17 +44,18 @@ int mm_key_sign(Key *, u_char **, u_int 
 void mm_inform_authserv(char *, char *);
 struct passwd *mm_getpwnamallow(const char *);
 char *mm_auth2_read_banner(void);
 int mm_auth_password(struct Authctxt *, char *);
 int mm_key_allowed(enum mm_keytype, char *, char *, Key *, int);
 int mm_user_key_allowed(struct passwd *, Key *, int);
 int mm_hostbased_key_allowed(struct passwd *, char *, char *, Key *);
 int mm_auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
-int mm_key_verify(Key *, u_char *, u_int, u_char *, u_int);
+int mm_hostbased_key_verify(Key *, u_char *, u_int, u_char *, u_int);
+int mm_user_key_verify(Key *, u_char *, u_int, u_char *, u_int);
 int mm_auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
 int mm_auth_rsa_verify_response(Key *, BIGNUM *, u_char *);
 BIGNUM *mm_auth_rsa_generate_challenge(Key *);
 
 #ifdef GSSAPI
 OM_uint32 mm_ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
 OM_uint32 mm_ssh_gssapi_accept_ctx(Gssctxt *,
    gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
@@ -71,17 +72,24 @@ void *mm_sshpam_init_ctx(struct Authctxt
 int mm_sshpam_query(void *, char **, char **, u_int *, char ***, u_int **);
 int mm_sshpam_respond(void *, u_int, char **);
 void mm_sshpam_free_ctx(void *);
 #endif
 
 #ifdef SSH_AUDIT_EVENTS
 #include "audit.h"
 void mm_audit_event(ssh_audit_event_t);
-void mm_audit_run_command(const char *);
+int mm_audit_run_command(const char *);
+void mm_audit_end_command(int, const char *);
+void mm_audit_unsupported_body(int);
+void mm_audit_kex_body(int, char *, char *, char *, char *, pid_t, uid_t);
+void mm_audit_session_key_free_body(int, pid_t, uid_t);
+void mm_audit_destroy_sensitive_data(const char *, pid_t, uid_t);
+int mm_forward_audit_messages(int);
+void mm_set_monitor_pipe(int);
 #endif
 
 struct Session;
 void mm_terminate(void);
 int mm_pty_allocate(int *, int *, char *, size_t);
 void mm_session_pty_cleanup2(struct Session *);
 
 /* SSHv1 interfaces */
diff --git a/openssh-7.2p2/packet.c b/openssh-7.2p2/packet.c
--- a/openssh-7.2p2/packet.c
+++ b/openssh-7.2p2/packet.c
@@ -62,16 +62,17 @@
 #include <time.h>
 
 #include <zlib.h>
 
 #include "buffer.h"	/* typedefs XXX */
 #include "key.h"	/* typedefs XXX */
 
 #include "xmalloc.h"
+#include "audit.h"
 #include "crc32.h"
 #include "deattack.h"
 #include "compat.h"
 #include "ssh1.h"
 #include "ssh2.h"
 #include "cipher.h"
 #include "sshkey.h"
 #include "kex.h"
@@ -449,16 +450,23 @@ ssh_packet_get_connection_in(struct ssh 
 /* Returns the descriptor used for writing. */
 
 int
 ssh_packet_get_connection_out(struct ssh *ssh)
 {
 	return ssh->state->connection_out;
 }
 
+static int
+packet_state_has_keys (const struct session_state *state)
+{
+	return state != NULL &&
+		(state->newkeys[MODE_IN] != NULL || state->newkeys[MODE_OUT] != NULL);
+}
+
 /*
  * Returns the IP-address of the remote host as a string.  The returned
  * string must not be freed.
  */
 
 const char *
 ssh_remote_ipaddr(struct ssh *ssh)
 {
@@ -493,23 +501,16 @@ ssh_packet_close(struct ssh *ssh)
 {
 	struct session_state *state = ssh->state;
 	int r;
 	u_int mode;
 
 	if (!state->initialized)
 		return;
 	state->initialized = 0;
-	if (state->connection_in == state->connection_out) {
-		shutdown(state->connection_out, SHUT_RDWR);
-		close(state->connection_out);
-	} else {
-		close(state->connection_in);
-		close(state->connection_out);
-	}
 	sshbuf_free(state->input);
 	sshbuf_free(state->output);
 	sshbuf_free(state->outgoing_packet);
 	sshbuf_free(state->incoming_packet);
 	for (mode = 0; mode < MODE_MAX; mode++)
 		kex_free_newkeys(state->newkeys[mode]);
 	if (state->compression_buffer) {
 		sshbuf_free(state->compression_buffer);
@@ -531,22 +532,32 @@ ssh_packet_close(struct ssh *ssh)
 			    (unsigned long long)stream->total_out,
 			    (unsigned long long)stream->total_in,
 			    stream->total_out == 0 ? 0.0 :
 			    (double) stream->total_in / stream->total_out);
 			if (state->compression_in_failures == 0)
 				inflateEnd(stream);
 		}
 	}
-	if ((r = cipher_cleanup(&state->send_context)) != 0)
-		error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r));
-	if ((r = cipher_cleanup(&state->receive_context)) != 0)
-		error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r));
+	if (packet_state_has_keys(state)) {
+		if ((r = cipher_cleanup(&state->send_context)) != 0)
+			error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r));
+		if ((r = cipher_cleanup(&state->receive_context)) != 0)
+			error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r));
+		audit_session_key_free(MODE_OUT);
+	}
 	free(ssh->remote_ipaddr);
 	ssh->remote_ipaddr = NULL;
+	if (state->connection_in == state->connection_out) {
+		shutdown(state->connection_out, SHUT_RDWR);
+		close(state->connection_out);
+	} else {
+		close(state->connection_in);
+		close(state->connection_out);
+	}
 	free(ssh->state);
 	ssh->state = NULL;
 }
 
 /* Sets remote side protocol flags. */
 
 void
 ssh_packet_set_protocol_flags(struct ssh *ssh, u_int protocol_flags)
@@ -961,16 +972,17 @@ ssh_set_newkeys(struct ssh *ssh, int mod
 	}
 	if (state->newkeys[mode] != NULL) {
 		debug("set_newkeys: rekeying, input %llu bytes %llu blocks, "
 		   "output %llu bytes %llu blocks",
 		   (unsigned long long)state->p_read.bytes,
 		   (unsigned long long)state->p_read.blocks,
 		   (unsigned long long)state->p_send.bytes,
 		   (unsigned long long)state->p_send.blocks);
+		audit_session_key_free(mode);
 		if ((r = cipher_cleanup(cc)) != 0)
 			return r;
 		enc  = &state->newkeys[mode]->enc;
 		mac  = &state->newkeys[mode]->mac;
 		comp = &state->newkeys[mode]->comp;
 		mac_clear(mac);
 		explicit_bzero(enc->iv,  enc->iv_len);
 		explicit_bzero(enc->key, enc->key_len);
@@ -2401,16 +2413,82 @@ ssh_packet_get_input(struct ssh *ssh)
 }
 
 void *
 ssh_packet_get_output(struct ssh *ssh)
 {
 	return (void *)ssh->state->output;
 }
 
+static void
+newkeys_destroy_and_free(struct newkeys *newkeys)
+{
+	if (newkeys == NULL)
+		return;
+
+	free(newkeys->enc.name);
+
+	if (newkeys->mac.enabled) {
+		mac_clear(&newkeys->mac);
+		free(newkeys->mac.name);
+	}
+
+	free(newkeys->comp.name);
+
+	newkeys_destroy(newkeys);
+	free(newkeys);
+}
+
+static void
+packet_destroy_state(struct session_state *state)
+{
+	if (state == NULL)
+		return;
+
+	cipher_cleanup(&state->receive_context);
+	cipher_cleanup(&state->send_context);
+
+	buffer_free(state->input);
+	state->input = NULL;
+	buffer_free(state->output);
+	state->output = NULL;
+	buffer_free(state->outgoing_packet);
+	state->outgoing_packet = NULL;
+	buffer_free(state->incoming_packet);
+	state->incoming_packet = NULL;
+	if( state->compression_buffer ) {
+		buffer_free(state->compression_buffer);
+		state->compression_buffer = NULL;
+	}
+	newkeys_destroy_and_free(state->newkeys[MODE_IN]);
+	state->newkeys[MODE_IN] = NULL;
+	newkeys_destroy_and_free(state->newkeys[MODE_OUT]);
+	state->newkeys[MODE_OUT] = NULL;
+	mac_destroy(state->packet_discard_mac);
+//	TAILQ_HEAD(, packet) outgoing;
+//	memset(state, 0, sizeof(state));
+}
+
+void
+packet_destroy_all(int audit_it, int privsep)
+{
+	if (audit_it)
+		audit_it = (active_state != NULL && packet_state_has_keys(active_state->state));
+	if (active_state != NULL)
+		packet_destroy_state(active_state->state);
+	if (audit_it) {
+#ifdef SSH_AUDIT_EVENTS
+		if (privsep)
+			audit_session_key_free(MODE_OUT);
+		else
+			audit_session_key_free_body(MODE_OUT, getpid(), getuid());
+#endif
+	}
+}
+
 /* Reset after_authentication and reset compression in post-auth privsep */
 static int
 ssh_packet_set_postauth(struct ssh *ssh)
 {
 	struct sshcomp *comp;
 	int r, mode;
 
 	debug("%s: called", __func__);
diff --git a/openssh-7.2p2/packet.h b/openssh-7.2p2/packet.h
--- a/openssh-7.2p2/packet.h
+++ b/openssh-7.2p2/packet.h
@@ -195,9 +195,10 @@ extern struct ssh *active_state;
 # undef EC_GROUP
 # undef EC_POINT
 #elif !defined(OPENSSL_HAS_ECC)
 # undef EC_KEY
 # undef EC_GROUP
 # undef EC_POINT
 #endif
 
+void	 packet_destroy_all(int, int);
 #endif				/* PACKET_H */
diff --git a/openssh-7.2p2/sandbox-seccomp-filter.c b/openssh-7.2p2/sandbox-seccomp-filter.c
--- a/openssh-7.2p2/sandbox-seccomp-filter.c
+++ b/openssh-7.2p2/sandbox-seccomp-filter.c
@@ -163,16 +163,22 @@ static const struct sock_filter preauth_
 	SC_ALLOW(geteuid32),
 #endif
 #ifdef __NR_getrandom
 	SC_ALLOW(getrandom),
 #endif
 #ifdef __NR_gettimeofday
 	SC_ALLOW(gettimeofday),
 #endif
+#ifdef SSH_AUDIT_EVENTS
+	SC_ALLOW(getuid),
+#ifdef __NR_getuid32 /* not defined on x86_64 */
+	SC_ALLOW(getuid32),
+#endif
+#endif
 #ifdef __NR_madvise
 	SC_ALLOW(madvise),
 #endif
 #ifdef __NR_mmap
 	SC_ALLOW(mmap),
 #endif
 #ifdef __NR_mmap2
 	SC_ALLOW(mmap2),
diff --git a/openssh-7.2p2/session.c b/openssh-7.2p2/session.c
--- a/openssh-7.2p2/session.c
+++ b/openssh-7.2p2/session.c
@@ -135,17 +135,17 @@ static int session_pty_req(Session *);
 
 /* import */
 extern ServerOptions options;
 extern char *__progname;
 extern int log_stderr;
 extern int debug_flag;
 extern u_int utmp_len;
 extern int startup_pipe;
-extern void destroy_sensitive_data(void);
+extern void destroy_sensitive_data(int);
 extern Buffer loginmsg;
 
 /* original command from peer. */
 const char *original_command = NULL;
 
 /* data */
 static int sessions_first_unused = -1;
 static int sessions_nalloc = 0;
@@ -155,16 +155,20 @@ static Session *sessions = NULL;
 #define SUBSYSTEM_EXT			1
 #define SUBSYSTEM_INT_SFTP		2
 #define SUBSYSTEM_INT_SFTP_ERROR	3
 
 #ifdef HAVE_LOGIN_CAP
 login_cap_t *lc;
 #endif
 
+#ifdef SSH_AUDIT_EVENTS
+int paudit[2];
+#endif
+
 static int is_child = 0;
 static int in_chroot = 0;
 
 /* Name and directory of socket for authentication agent forwarding. */
 static char *auth_sock_name = NULL;
 static char *auth_sock_dir = NULL;
 
 /* removes the agent forwarding socket */
@@ -747,16 +751,24 @@ do_exec_pty(Session *s, const char *comm
 	cygwin_set_impersonation_token(INVALID_HANDLE_VALUE);
 #endif
 
 	s->pid = pid;
 
 	/* Parent.  Close the slave side of the pseudo tty. */
 	close(ttyfd);
 
+#if !defined(HAVE_OSF_SIA) && defined(SSH_AUDIT_EVENTS)
+	/* do_login in the child did not affect state in this process,
+	   compensate.  From an architectural standpoint, this is extremely
+	   ugly. */
+	if (!(options.use_login && command == NULL))
+		audit_count_session_open();
+#endif
+
 	/* Enter interactive session. */
 	s->ptymaster = ptymaster;
 	packet_set_interactive(1, 
 	    options.ip_qos_interactive, options.ip_qos_bulk);
 	if (compat20) {
 		session_set_fds(s, ptyfd, fdout, -1, 1, 1);
 	} else {
 		server_loop(pid, ptyfd, fdout, -1);
@@ -842,40 +854,60 @@ do_exec(Session *s, const char *command)
 	    tty == NULL ? "" : " on ",
 	    tty == NULL ? "" : tty,
 	    s->pw->pw_name,
 	    get_remote_ipaddr(),
 	    get_remote_port(),
 	    s->self);
 
 #ifdef SSH_AUDIT_EVENTS
+	if (s->command != NULL || s->command_handle != -1)
+		fatal("do_exec: command already set");
 	if (command != NULL)
-		PRIVSEP(audit_run_command(command));
+		s->command = xstrdup(command);
 	else if (s->ttyfd == -1) {
 		char *shell = s->pw->pw_shell;
 
 		if (shell[0] == '\0')	/* empty shell means /bin/sh */
 			shell =_PATH_BSHELL;
-		PRIVSEP(audit_run_command(shell));
+		s->command = xstrdup(shell);
 	}
+	if (s->command != NULL && s->ptyfd == -1)
+		s->command_handle = PRIVSEP(audit_run_command(s->command));
+	if (pipe(paudit) < 0)
+		fatal("pipe: %s", strerror(errno));
 #endif
 	if (s->ttyfd != -1)
 		ret = do_exec_pty(s, command);
 	else
 		ret = do_exec_no_pty(s, command);
 
 	original_command = NULL;
 
 	/*
 	 * Clear loginmsg: it's the child's responsibility to display
 	 * it to the user, otherwise multiple sessions may accumulate
 	 * multiple copies of the login messages.
 	 */
 	buffer_clear(&loginmsg);
 
+#ifdef SSH_AUDIT_EVENTS
+	close(paudit[1]);
+	if (use_privsep && ret == 0) {
+		/*
+		 * Read the audit messages from forked child and send them
+		 * back to monitor. We don't want to communicate directly,
+		 * because the messages might get mixed up.
+		 * Continue after the pipe gets closed (all messages sent).
+		 */
+		ret = mm_forward_audit_messages(paudit[0]);
+	}
+	close(paudit[0]);
+#endif /* SSH_AUDIT_EVENTS */
+
 	return ret;
 }
 
 /* administrative, login(1)-like work */
 void
 do_login(Session *s, const char *command)
 {
 	socklen_t fromlen;
@@ -1697,18 +1729,37 @@ do_child(Session *s, const char *command
 	extern char **environ;
 	char **env;
 	int env_size;
 	char *argv[ARGV_MAX];
 	const char *shell, *shell0, *hostname = NULL;
 	struct passwd *pw = s->pw;
 	int r = 0;
 
+#ifdef SSH_AUDIT_EVENTS
+	int pparent = paudit[1];
+	close(paudit[0]);
+	/* Hack the monitor pipe to avoid race condition with parent */
+	if (use_privsep)
+		mm_set_monitor_pipe(pparent);
+#endif
+
 	/* remove hostkey from the child's memory */
-	destroy_sensitive_data();
+	destroy_sensitive_data(use_privsep);
+	/*
+	 * We can audit this, because wer hacked the pipe to direct the
+	 * messages over postauth child. But this message requires answer
+	 * which we can't do using one-way pipe.
+	 */
+	packet_destroy_all(0, 1);
+
+#ifdef SSH_AUDIT_EVENTS
+	/* Notify parent that we are done */
+	close(pparent);
+#endif
 
 	/* Force a password change */
 	if (s->authctxt->force_pwchange) {
 		do_setusercontext(pw);
 		child_close_fds();
 		do_pwchange(s);
 		exit(1);
 	}
@@ -1925,16 +1976,19 @@ session_unused(int id)
 	memset(&sessions[id], 0, sizeof(*sessions));
 	sessions[id].self = id;
 	sessions[id].used = 0;
 	sessions[id].chanid = -1;
 	sessions[id].ptyfd = -1;
 	sessions[id].ttyfd = -1;
 	sessions[id].ptymaster = -1;
 	sessions[id].x11_chanids = NULL;
+#ifdef SSH_AUDIT_EVENTS
+	sessions[id].command_handle = -1;
+#endif
 	sessions[id].next_unused = sessions_first_unused;
 	sessions_first_unused = id;
 }
 
 Session *
 session_new(void)
 {
 	Session *s, *tmp;
@@ -2007,16 +2061,29 @@ session_open(Authctxt *authctxt, int cha
 	if (s->pw == NULL || !authctxt->valid)
 		fatal("no user for session %d", s->self);
 	debug("session_open: session %d: link with channel %d", s->self, chanid);
 	s->chanid = chanid;
 	return 1;
 }
 
 Session *
+session_by_id(int id)
+{
+	if (id >= 0 && id < sessions_nalloc) {
+		Session *s = &sessions[id];
+		if (s->used)
+			return s;
+	}
+	debug("%s: unknown id %d", __func__, id);
+	session_dump();
+	return NULL;
+}
+
+Session *
 session_by_tty(char *tty)
 {
 	int i;
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used && s->ttyfd != -1 && strcmp(s->tty, tty) == 0) {
 			debug("session_by_tty: session %d tty %s", i, tty);
 			return s;
@@ -2529,16 +2596,42 @@ session_exit_message(Session *s, int sta
 	 * interested in data we write.
 	 * Note that we must not call 'chan_read_failed', since there could
 	 * be some more data waiting in the pipe.
 	 */
 	if (c->ostate != CHAN_OUTPUT_CLOSED)
 		chan_write_failed(c);
 }
 
+#ifdef SSH_AUDIT_EVENTS
+void
+session_end_command2(Session *s)
+{
+	if (s->command != NULL) {
+		if (s->command_handle != -1)
+			audit_end_command(s->command_handle, s->command);
+		free(s->command);
+		s->command = NULL;
+		s->command_handle = -1;
+	}
+}
+
+static void
+session_end_command(Session *s)
+{
+	if (s->command != NULL) {
+		if (s->command_handle != -1)
+			PRIVSEP(audit_end_command(s->command_handle, s->command));
+		free(s->command);
+		s->command = NULL;
+		s->command_handle = -1;
+	}
+}
+#endif
+
 void
 session_close(Session *s)
 {
 	u_int i;
 
 	verbose("Close session: user %s from %.200s port %d id %d",
 	    s->pw->pw_name,
 	    get_remote_ipaddr(),
@@ -2570,16 +2663,20 @@ session_close(Session *s)
 			exit(0);
 		} else if (pid > 0) {
 			waitpid(pid, NULL, 0);
 		}
 	}
 
 	if (s->ttyfd != -1)
 		session_pty_cleanup(s);
+#ifdef SSH_AUDIT_EVENTS
+	if (s->command)
+		session_end_command(s);
+#endif
 	free(s->term);
 	free(s->display);
 	free(s->x11_chanids);
 	free(s->auth_display);
 	free(s->auth_data);
 	free(s->auth_proto);
 	free(s->subsys);
 	if (s->env != NULL) {
@@ -2784,16 +2881,25 @@ session_setup_x11fwd(Session *s)
 }
 
 static void
 do_authenticated2(Authctxt *authctxt)
 {
 	server_loop2(authctxt);
 }
 
+static void
+do_cleanup_one_session(Session *s)
+{
+	session_pty_cleanup2(s);
+#ifdef SSH_AUDIT_EVENTS
+	session_end_command2(s);
+#endif
+}
+
 void
 do_cleanup(Authctxt *authctxt)
 {
 	static int called = 0;
 
 	debug("do_cleanup");
 
 	/* no cleanup if we're in the child for login shell */
@@ -2832,10 +2938,10 @@ do_cleanup(Authctxt *authctxt)
 	/* remove agent socket */
 	auth_sock_cleanup_proc(authctxt->pw);
 
 	/*
 	 * Cleanup ptys/utmp only if privsep is disabled,
 	 * or if running in monitor.
 	 */
 	if (!use_privsep || mm_is_monitor())
-		session_destroy_all(session_pty_cleanup2);
+		session_destroy_all(do_cleanup_one_session);
 }
diff --git a/openssh-7.2p2/session.h b/openssh-7.2p2/session.h
--- a/openssh-7.2p2/session.h
+++ b/openssh-7.2p2/session.h
@@ -56,29 +56,37 @@ struct Session {
 	int	*x11_chanids;
 	int	is_subsystem;
 	char	*subsys;
 	u_int	num_env;
 	struct {
 		char	*name;
 		char	*val;
 	} *env;
+
+	/* exec */
+#ifdef SSH_AUDIT_EVENTS
+	int	command_handle;
+	char	*command;
+#endif
 };
 
 void	 do_authenticated(Authctxt *);
 void	 do_cleanup(Authctxt *);
 
 int	 session_open(Authctxt *, int);
 void	 session_unused(int);
 int	 session_input_channel_req(Channel *, const char *);
 void	 session_close_by_pid(pid_t, int);
 void	 session_close_by_channel(int, void *);
 void	 session_destroy_all(void (*)(Session *));
 void	 session_pty_cleanup2(Session *);
+void	 session_end_command2(Session *);
 
 Session	*session_new(void);
+Session *session_by_id(int);
 Session	*session_by_tty(char *);
 void	 session_close(Session *);
 void	 do_setusercontext(struct passwd *);
 void	 child_set_env(char ***envp, u_int *envsizep, const char *name,
 		       const char *value);
 
 #endif
diff --git a/openssh-7.2p2/sshd.c b/openssh-7.2p2/sshd.c
--- a/openssh-7.2p2/sshd.c
+++ b/openssh-7.2p2/sshd.c
@@ -118,16 +118,17 @@
 #include "channels.h"
 #include "session.h"
 #include "monitor_mm.h"
 #include "monitor.h"
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 #include "monitor_wrap.h"
+#include "audit.h"
 #include "ssh-sandbox.h"
 #include "version.h"
 #include "ssherr.h"
 
 #include "fips.h"
 
 #ifdef USE_SECURITY_SESSION_API
 #include <Security/AuthSession.h>
@@ -263,17 +264,17 @@ Buffer cfg;
 
 /* message to be displayed after login */
 Buffer loginmsg;
 
 /* Unprivileged user */
 struct passwd *privsep_pw = NULL;
 
 /* Prototypes for various functions defined later in this file. */
-void destroy_sensitive_data(void);
+void destroy_sensitive_data(int);
 void demote_sensitive_data(void);
 
 #ifdef WITH_SSH1
 static void do_ssh1_kex(void);
 #endif
 static void do_ssh2_kex(void);
 
 /*
@@ -284,16 +285,25 @@ close_listen_socks(void)
 {
 	int i;
 
 	for (i = 0; i < num_listen_socks; i++)
 		close(listen_socks[i]);
 	num_listen_socks = -1;
 }
 
+/*
+ * Is this process listening for clients (i.e. not specific to any specific
+ * client connection?)
+ */
+int listening_for_clients(void)
+{
+	return num_listen_socks > 0;
+}
+
 static void
 close_startup_pipes(void)
 {
 	int i;
 
 	if (startup_pipes)
 		for (i = 0; i < options.max_startups; i++)
 			if (startup_pipes[i] != -1)
@@ -563,60 +573,105 @@ sshd_exchange_identification(int sock_in
 		close(sock_out);
 		logit("Protocol major versions differ for %s: %.200s vs. %.200s",
 		    get_remote_ipaddr(),
 		    server_version_string, client_version_string);
 		cleanup_exit(255);
 	}
 }
 
-/* Destroy the host and server keys.  They will no longer be needed. */
+/*
+ * Destroy the host and server keys.  They will no longer be needed.  Careful,
+ * this can be called from cleanup_exit() - i.e. from just about anywhere.
+ */
 void
-destroy_sensitive_data(void)
+destroy_sensitive_data(int privsep)
 {
 	int i;
+#ifdef SSH_AUDIT_EVENTS
+	pid_t pid;
+	uid_t uid;
 
+	pid = getpid();
+	uid = getuid();
+#endif
 	if (sensitive_data.server_key) {
 		key_free(sensitive_data.server_key);
 		sensitive_data.server_key = NULL;
 	}
 	for (i = 0; i < options.num_host_key_files; i++) {
 		if (sensitive_data.host_keys[i]) {
+			char *fp;
+
+			if (key_is_private(sensitive_data.host_keys[i]))
+				fp = sshkey_fingerprint(sensitive_data.host_keys[i], options.fingerprint_hash, SSH_FP_HEX);
+			else
+				fp = NULL;
 			key_free(sensitive_data.host_keys[i]);
 			sensitive_data.host_keys[i] = NULL;
+			if (fp != NULL) {
+#ifdef SSH_AUDIT_EVENTS
+				if (privsep)
+					PRIVSEP(audit_destroy_sensitive_data(fp,
+						pid, uid));
+				else
+					audit_destroy_sensitive_data(fp,
+						pid, uid);
+#endif
+				free(fp);
+			}
 		}
-		if (sensitive_data.host_certificates[i]) {
+		if (sensitive_data.host_certificates
+		    && sensitive_data.host_certificates[i]) {
 			key_free(sensitive_data.host_certificates[i]);
 			sensitive_data.host_certificates[i] = NULL;
 		}
 	}
 	sensitive_data.ssh1_host_key = NULL;
 	explicit_bzero(sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH);
 }
 
 /* Demote private to public keys for network child */
 void
 demote_sensitive_data(void)
 {
 	Key *tmp;
 	int i;
+#ifdef SSH_AUDIT_EVENTS
+	pid_t pid;
+	uid_t uid;
 
+	pid = getpid();
+	uid = getuid();
+#endif
 	if (sensitive_data.server_key) {
 		tmp = key_demote(sensitive_data.server_key);
 		key_free(sensitive_data.server_key);
 		sensitive_data.server_key = tmp;
 	}
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		if (sensitive_data.host_keys[i]) {
+			char *fp;
+
+			if (key_is_private(sensitive_data.host_keys[i]))
+				fp = sshkey_fingerprint(sensitive_data.host_keys[i], options.fingerprint_hash, SSH_FP_HEX);
+			else
+				fp = NULL;
 			tmp = key_demote(sensitive_data.host_keys[i]);
 			key_free(sensitive_data.host_keys[i]);
 			sensitive_data.host_keys[i] = tmp;
 			if (tmp->type == KEY_RSA1)
 				sensitive_data.ssh1_host_key = tmp;
+			if (fp != NULL) {
+#ifdef SSH_AUDIT_EVENTS
+				audit_destroy_sensitive_data(fp, pid, uid);
+#endif
+				free(fp);
+			}
 		}
 		/* Certs do not need demotion */
 	}
 
 	/* We do not clear ssh1_host key and cookie.  XXX - Okay Niels? */
 }
 
 static void
@@ -756,16 +811,22 @@ privsep_postauth(Authctxt *authctxt)
 	monitor_reinit(pmonitor);
 
 	pmonitor->m_pid = fork();
 	if (pmonitor->m_pid == -1)
 		fatal("fork of unprivileged child failed");
 	else if (pmonitor->m_pid != 0) {
 		verbose("User child is on pid %ld", (long)pmonitor->m_pid);
 		buffer_clear(&loginmsg);
+		if (*pmonitor->m_pkex != NULL ){
+			newkeys_destroy((*pmonitor->m_pkex)->newkeys[MODE_OUT]);
+			newkeys_destroy((*pmonitor->m_pkex)->newkeys[MODE_IN]);
+			audit_session_key_free_body(2, getpid(), getuid());
+			packet_destroy_all(0, 0);
+		}
 		monitor_child_postauth(pmonitor);
 
 		/* NEVERREACHED */
 		exit(0);
 	}
 
 	/* child */
 
@@ -1283,16 +1344,17 @@ server_accept_loop(int *sock_in, int *so
 
 		/* Wait in select until there is a connection. */
 		ret = select(maxfd+1, fdset, NULL, NULL, NULL);
 		if (ret < 0 && errno != EINTR)
 			error("select: %.100s", strerror(errno));
 		if (received_sigterm) {
 			logit("Received signal %d; terminating.",
 			    (int) received_sigterm);
+			destroy_sensitive_data(0);
 			close_listen_socks();
 			if (options.pid_file != NULL)
 				unlink(options.pid_file);
 			exit(received_sigterm == SIGTERM ? 0 : 255);
 		}
 		if (key_used && key_do_regen) {
 			generate_ephemeral_server_key();
 			key_used = 0;
@@ -2345,16 +2407,17 @@ main(int ac, char **av)
 #endif
 	}
 	/*
 	 * If we use privilege separation, the unprivileged child transfers
 	 * the current keystate and exits
 	 */
 	if (use_privsep) {
 		mm_send_keystate(pmonitor);
+		packet_destroy_all(1, 1);
 		exit(0);
 	}
 
  authenticated:
 	/*
 	 * Cancel the alarm we set to limit the time taken for
 	 * authentication.
 	 */
@@ -2387,30 +2450,33 @@ main(int ac, char **av)
 	/*
 	 * In privilege separation, we fork another child and prepare
 	 * file descriptor passing.
 	 */
 	if (use_privsep) {
 		privsep_postauth(authctxt);
 		/* the monitor process [priv] will not return */
 		if (!compat20)
-			destroy_sensitive_data();
+			destroy_sensitive_data(0);
 	}
 
 	packet_set_timeout(options.client_alive_interval,
 	    options.client_alive_count_max);
 
 	/* Try to send all our hostkeys to the client */
 	if (compat20)
 		notify_hostkeys(active_state);
 
 	/* Start session. */
 	do_authenticated(authctxt);
 
 	/* The connection has been terminated. */
+	packet_destroy_all(1, 1);
+	destroy_sensitive_data(1);
+
 	packet_get_bytes(&ibytes, &obytes);
 	verbose("Transferred: sent %llu, received %llu bytes",
 	    (unsigned long long)obytes, (unsigned long long)ibytes);
 
 	verbose("Closing connection to %.500s port %d", remote_ip, remote_port);
 
 #ifdef USE_PAM
 	if (options.use_pam)
@@ -2561,16 +2627,20 @@ do_ssh1_kex(void)
 		packet_disconnect("Warning: client selects unsupported cipher.");
 
 	/* Get check bytes from the packet.  These must match those we
 	   sent earlier with the public key packet. */
 	for (i = 0; i < 8; i++)
 		if (cookie[i] != packet_get_char())
 			packet_disconnect("IP Spoofing check bytes do not match.");
 
+#ifdef SSH_AUDIT_EVENTS
+	audit_kex(MODE_OUT, cipher_name(cipher_type), "crc", "none", "none");
+#endif
+
 	debug("Encryption type: %.200s", cipher_name(cipher_type));
 
 	/* Get the encrypted integer. */
 	if ((real_key_int = BN_new()) == NULL)
 		fatal("do_ssh1_kex: BN_new failed");
 	packet_get_bignum(real_key_int);
 
 	protocol_flags = packet_get_int();
@@ -2620,17 +2690,17 @@ do_ssh1_kex(void)
 		 * Xor the first 16 bytes of the session key with the
 		 * session id.
 		 */
 		for (i = 0; i < 16; i++)
 			session_key[i] ^= session_id[i];
 	}
 
 	/* Destroy the private and public keys. No longer. */
-	destroy_sensitive_data();
+	destroy_sensitive_data(1);
 
 	if (use_privsep)
 		mm_ssh1_session_id(session_id);
 
 	/* Destroy the decrypted integer.  It is no longer needed. */
 	BN_clear_free(real_key_int);
 	BN_clear_free(fake_key_int);
 
@@ -2794,26 +2864,41 @@ do_ssh2_kex(void)
 #endif
 	debug("KEX done");
 }
 
 /* server specific fatal cleanup */
 void
 cleanup_exit(int i)
 {
+	static int in_cleanup = 0;
+	int is_privsep_child;
+
+	/* cleanup_exit can be called at the very least from the privsep
+	   wrappers used for auditing.  Make sure we don't recurse
+	   indefinitely. */
+	if (in_cleanup)
+		_exit(i);
+	in_cleanup = 1;
+
 	if (the_authctxt) {
 		do_cleanup(the_authctxt);
 		if (use_privsep && privsep_is_preauth &&
 		    pmonitor != NULL && pmonitor->m_pid > 1) {
 			debug("Killing privsep child %d", pmonitor->m_pid);
 			if (kill(pmonitor->m_pid, SIGKILL) != 0 &&
 			    errno != ESRCH)
 				error("%s: kill(%d): %s", __func__,
 				    pmonitor->m_pid, strerror(errno));
 		}
 	}
+	is_privsep_child = use_privsep && pmonitor != NULL && pmonitor->m_pid == 0;
+	if (sensitive_data.host_keys != NULL)
+		destroy_sensitive_data(is_privsep_child);
+	packet_destroy_all(1, is_privsep_child);
 #ifdef SSH_AUDIT_EVENTS
 	/* done after do_cleanup so it can cancel the PAM auth 'thread' */
-	if (!use_privsep || mm_is_monitor())
+	if ((the_authctxt == NULL || !the_authctxt->authenticated) &&
+	    (!use_privsep || mm_is_monitor()))
 		audit_event(SSH_CONNECTION_ABANDON);
 #endif
 	_exit(i);
 }
diff --git a/openssh-7.2p2/sshkey.c b/openssh-7.2p2/sshkey.c
--- a/openssh-7.2p2/sshkey.c
+++ b/openssh-7.2p2/sshkey.c
@@ -299,16 +299,43 @@ sshkey_type_is_valid_ca(int type)
 	case KEY_ED25519:
 		return 1;
 	default:
 		return 0;
 	}
 }
 
 int
+sshkey_is_private(const struct sshkey *k)
+{
+      switch (k->type) {
+#ifdef WITH_OPENSSL
+      case KEY_RSA_CERT:
+      case KEY_RSA1:
+      case KEY_RSA:
+              return k->rsa->d != NULL;
+      case KEY_DSA_CERT:
+      case KEY_DSA:
+              return k->dsa->priv_key != NULL;
+#ifdef OPENSSL_HAS_ECC
+      case KEY_ECDSA_CERT:
+      case KEY_ECDSA:
+              return EC_KEY_get0_private_key(k->ecdsa) != NULL;
+#endif /* OPENSSL_HAS_ECC */
+#endif /* WITH_OPENSSL */
+      case KEY_ED25519_CERT:
+      case KEY_ED25519:
+              return (k->ed25519_pk != NULL);
+      default:
+              /* fatal("key_is_private: bad key type %d", k->type); */
+              return 0;
+      }
+}
+
+int
 sshkey_is_cert(const struct sshkey *k)
 {
 	if (k == NULL)
 		return 0;
 	return sshkey_type_is_cert(k->type);
 }
 
 /* Return the cert-less equivalent to a certified key type */
diff --git a/openssh-7.2p2/sshkey.h b/openssh-7.2p2/sshkey.h
--- a/openssh-7.2p2/sshkey.h
+++ b/openssh-7.2p2/sshkey.h
@@ -128,16 +128,17 @@ const char	*sshkey_type(const struct ssh
 const char	*sshkey_cert_type(const struct sshkey *);
 int		 sshkey_write(const struct sshkey *, FILE *);
 int		 sshkey_read(struct sshkey *, char **);
 u_int		 sshkey_size(const struct sshkey *);
 
 int		 sshkey_generate(int type, u_int bits, struct sshkey **keyp);
 int		 sshkey_from_private(const struct sshkey *, struct sshkey **);
 int	 sshkey_type_from_name(const char *);
+int	 sshkey_is_private(const struct sshkey *);
 int	 sshkey_is_cert(const struct sshkey *);
 int	 sshkey_type_is_cert(int);
 int	 sshkey_type_plain(int);
 int	 sshkey_to_certified(struct sshkey *);
 int	 sshkey_drop_cert(struct sshkey *);
 int	 sshkey_certify(struct sshkey *, struct sshkey *);
 int	 sshkey_cert_copy(const struct sshkey *, struct sshkey *);
 int	 sshkey_cert_check_authority(const struct sshkey *, int, int,

Places

File openssh-7.2p2-audit.patch of Package openssh.8419

Places