diff -up openssh-5.6p1/audit-bsm.c.audit3 openssh-5.6p1/audit-bsm.c

--- openssh-5.6p1/audit-bsm.c.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/audit-bsm.c	2010-12-10 22:17:31.000000000 +0100

@@ -383,4 +383,16 @@ audit_event(ssh_audit_event_t event)

 		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)

+{

+	/* not implemented */

+}

 #endif /* BSM */

diff -up openssh-5.6p1/audit.c.audit3 openssh-5.6p1/audit.c

--- openssh-5.6p1/audit.c.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/audit.c	2010-12-10 22:17:31.000000000 +0100

@@ -36,6 +36,8 @@

 #include "key.h"

 #include "hostfile.h"

 #include "auth.h"

+#include "ssh-gss.h"

+#include "monitor_wrap.h"

 /*

  * Care must be taken when using this since it WILL NOT be initialized when

@@ -138,6 +140,18 @@ audit_key(int type, int *rv, const Key *

 	xfree(fp);

 }

+void

+audit_unsupported(int what)

+{

+	PRIVSEP(audit_unsupported_body(what));

+}

+

+void

+audit_kex(int ctos, char *enc, char *mac, char *comp)

+{

+	PRIVSEP(audit_kex_body(ctos, enc, mac, comp));

+}

+

 # ifndef CUSTOM_SSH_AUDIT_EVENTS

 /*

  * Null implementations of audit functions.

@@ -221,5 +235,24 @@ audit_keyusage(int host_user, const char

 	debug("audit %s key usage euid %d user %s key type %s key length %d fingerprint %s, result %d", 

 		host_user ? "hostbased" : "pubkey", geteuid(), audit_username(), type, len, fp, rv);

 }

+

+/*

+ * This will be called when the protocol negotiation fails.

+ */

+void

+audit_unsupported_body(int what)

+{

+	debug("audit unsupported protocol ieuid %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)

+{

+	debug("audit procol negotiation euid %d direction %d cipher %s mac %s compresion %s",

+		geteuid(), ctos, enc, mac, compress);

+}

 # endif  /* !defined CUSTOM_SSH_AUDIT_EVENTS */

 #endif /* SSH_AUDIT_EVENTS */

diff -up openssh-5.6p1/audit.h.audit3 openssh-5.6p1/audit.h

--- openssh-5.6p1/audit.h.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/audit.h	2010-12-10 22:17:31.000000000 +0100

@@ -56,5 +56,9 @@ void	audit_run_command(const char *);

 ssh_audit_event_t audit_classify_auth(const char *);

 int	audit_keyusage(int, const char *, unsigned, char *, int);

 int	audit_key(int, int *, const Key *);

+void	audit_unsupported(int);

+void	audit_kex(int, char *, char *, char *);

+void	audit_unsupported_body(int);

+void	audit_kex_body(int, char *, char *, char *);

 #endif /* _SSH_AUDIT_H */

diff -up openssh-5.6p1/audit-linux.c.audit3 openssh-5.6p1/audit-linux.c

--- openssh-5.6p1/audit-linux.c.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/audit-linux.c	2010-12-10 22:20:00.000000000 +0100

@@ -36,6 +36,8 @@

 #include "log.h"

 #include "audit.h"

 #include "canohost.h"

+#include "packet.h"

+#include "cipher.h"

 #define AUDIT_LOG_SIZE 128

@@ -151,4 +153,54 @@ audit_event(ssh_audit_event_t event)

 	}

 }

+void

+audit_unsupported_body(int what)

+{

+#ifdef AUDIT_CRYPTO_SESSION

+	char buf[AUDIT_LOG_SIZE];

+	const static char *name[] = { "cipher", "mac", "comp" };

+	int audit_fd, audit_ok;

+

+	snprintf(buf, sizeof(buf), "unsupported-%s direction=? cipher=? ksize=? rport=%d laddr=%s lport=%d",

+		name[what], get_remote_port(), get_local_ipaddr(packet_get_connection_in()),

+		get_local_port());

+	audit_fd = audit_open();

+	if (audit_fd < 0)

+		/* no problem, the next instruction will be fatal() */

+		return;

+	audit_ok = audit_log_acct_message(audit_fd, AUDIT_CRYPTO_SESSION, NULL,

+			buf, NULL, -1, NULL, get_remote_ipaddr(), NULL, 0);

+	audit_close(audit_fd);

+#endif

+}

+

+void

+audit_kex_body(int ctos, char *enc, char *mac, char *compress)

+{

+#ifdef AUDIT_CRYPTO_SESSION

+	char buf[AUDIT_LOG_SIZE];

+	int audit_fd, audit_ok;

+	const static char *direction[] = { "from-server", "from-client", "both" };

+	Cipher *cipher = cipher_by_name(enc);

+

+	snprintf(buf, sizeof(buf), "start direction=%s cipher=%s, ksize=%d rport=%d laddr=%s lport=%d",

+		direction[ctos], enc, cipher ? 8 * cipher->key_len : 0,

+		get_remote_port(), get_local_ipaddr(packet_get_connection_in()), get_local_port());

+	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_acct_message(audit_fd, AUDIT_CRYPTO_SESSION, NULL,

+			buf, NULL, -1, 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

+}

+

 #endif /* USE_LINUX_AUDIT */

diff -up openssh-5.6p1/auditstub.c.audit3 openssh-5.6p1/auditstub.c

--- openssh-5.6p1/auditstub.c.audit3	2010-12-10 22:17:32.000000000 +0100

+++ openssh-5.6p1/auditstub.c	2010-12-10 22:17:32.000000000 +0100

@@ -0,0 +1,39 @@

+/* $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>

+ */

+

+void

+audit_unsupported(int n)

+{

+}

+

+void

+audit_kex(int ctos, char *enc, char *mac, char *comp)

+{

+}

+

diff -up openssh-5.6p1/cipher.c.audit3 openssh-5.6p1/cipher.c

--- openssh-5.6p1/cipher.c.audit3	2010-09-03 14:54:23.000000000 +0200

+++ openssh-5.6p1/cipher.c	2010-12-10 22:17:32.000000000 +0100

@@ -59,15 +59,7 @@ extern void ssh1_3des_iv(EVP_CIPHER_CTX 

 extern const EVP_CIPHER *evp_aes_128_ctr(void);

 extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);

-struct Cipher {

-	char	*name;

-	int	number;		/* for ssh1 only */

-	u_int	block_size;

-	u_int	key_len;

-	u_int	discard_len;

-	u_int	cbc_mode;

-	const EVP_CIPHER	*(*evptype)(void);

-} ciphers[] = {

+struct Cipher ciphers[] = {

 	{ "none",		SSH_CIPHER_NONE, 8, 0, 0, 0, EVP_enc_null },

 	{ "des",		SSH_CIPHER_DES, 8, 8, 0, 1, EVP_des_cbc },

 	{ "3des",		SSH_CIPHER_3DES, 8, 16, 0, 1, evp_ssh1_3des },

diff -up openssh-5.6p1/cipher.h.audit3 openssh-5.6p1/cipher.h

--- openssh-5.6p1/cipher.h.audit3	2009-01-28 06:38:41.000000000 +0100

+++ openssh-5.6p1/cipher.h	2010-12-10 22:17:32.000000000 +0100

@@ -61,7 +61,16 @@

 typedef struct Cipher Cipher;

 typedef struct CipherContext CipherContext;

-struct Cipher;

+struct Cipher {

+	char	*name;

+	int	number;		/* for ssh1 only */

+	u_int	block_size;

+	u_int	key_len;

+	u_int	discard_len;

+	u_int	cbc_mode;

+	const EVP_CIPHER	*(*evptype)(void);

+};

+

 struct CipherContext {

 	int	plaintext;

 	EVP_CIPHER_CTX evp;

diff -up openssh-5.6p1/kex.c.audit3 openssh-5.6p1/kex.c

--- openssh-5.6p1/kex.c.audit3	2010-01-08 06:50:41.000000000 +0100

+++ openssh-5.6p1/kex.c	2010-12-10 22:17:32.000000000 +0100

@@ -49,6 +49,7 @@

 #include "dispatch.h"

 #include "monitor.h"

 #include "roaming.h"

+#include "audit.h"

 #if OPENSSL_VERSION_NUMBER >= 0x00907000L

 # if defined(HAVE_EVP_SHA256)

@@ -258,9 +259,13 @@ static void

 choose_enc(Enc *enc, char *client, char *server)

 {

 	char *name = match_list(client, server, NULL);

-	if (name == NULL)

+	if (name == NULL) {

+#ifdef SSH_AUDIT_EVENTS

+		audit_unsupported(0);

+#endif

 		fatal("no matching cipher found: client %s server %s",

 		    client, server);

+	}

 	if ((enc->cipher = cipher_by_name(name)) == NULL)

 		fatal("matching cipher is not supported: %s", name);

 	enc->name = name;

@@ -275,9 +280,13 @@ static void

 choose_mac(Mac *mac, char *client, char *server)

 {

 	char *name = match_list(client, server, NULL);

-	if (name == NULL)

+	if (name == NULL) {

+#ifdef SSH_AUDIT_EVENTS

+		audit_unsupported(1);

+#endif

 		fatal("no matching mac found: client %s server %s",

 		    client, server);

+	}

 	if (mac_setup(mac, name) < 0)

 		fatal("unsupported mac %s", name);

 	/* truncate the key */

@@ -292,8 +301,12 @@ static void

 choose_comp(Comp *comp, char *client, char *server)

 {

 	char *name = match_list(client, server, NULL);

-	if (name == NULL)

+	if (name == NULL) {

+#ifdef SSH_AUDIT_EVENTS

+		audit_unsupported(2);

+#endif

 		fatal("no matching comp found: client %s server %s", client, server);

+	}

 	if (strcmp(name, "zlib@openssh.com") == 0) {

 		comp->type = COMP_DELAYED;

 	} else if (strcmp(name, "zlib") == 0) {

@@ -414,6 +427,9 @@ kex_choose_conf(Kex *kex)

 		    newkeys->enc.name,

 		    newkeys->mac.name,

 		    newkeys->comp.name);

+#ifdef SSH_AUDIT_EVENTS

+		audit_kex(ctos, newkeys->enc.name, newkeys->mac.name, newkeys->comp.name);

+#endif

 	}

 	choose_kex(kex, cprop[PROPOSAL_KEX_ALGS], sprop[PROPOSAL_KEX_ALGS]);

 	choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS],

diff -up openssh-5.6p1/Makefile.in.audit3 openssh-5.6p1/Makefile.in

--- openssh-5.6p1/Makefile.in.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/Makefile.in	2010-12-10 22:17:32.000000000 +0100

@@ -74,7 +74,7 @@ LIBSSH_OBJS=acss.o authfd.o authfile.o b

 	monitor_fdpass.o rijndael.o ssh-dss.o ssh-rsa.o dh.o kexdh.o \

 	kexgex.o kexdhc.o kexgexc.o msg.o progressmeter.o dns.o \

 	entropy.o gss-genr.o umac.o jpake.o schnorr.o \

-	ssh-pkcs11.o

+	ssh-pkcs11.o auditstub.o

 SSHOBJS= ssh.o readconf.o clientloop.o sshtty.o \

 	sshconnect.o sshconnect1.o sshconnect2.o mux.o \

diff -up openssh-5.6p1/monitor.c.audit3 openssh-5.6p1/monitor.c

--- openssh-5.6p1/monitor.c.audit3	2010-12-10 22:17:31.000000000 +0100

+++ openssh-5.6p1/monitor.c	2010-12-10 22:17:32.000000000 +0100

@@ -89,6 +89,7 @@

 #include "ssh2.h"

 #include "jpake.h"

 #include "roaming.h"

+#include "audit.h"

 #ifdef GSSAPI

 static Gssctxt *gsscontext = NULL;

@@ -177,6 +178,8 @@ int mm_answer_gss_checkmic(int, Buffer *

 #ifdef SSH_AUDIT_EVENTS

 int mm_answer_audit_event(int, Buffer *);

 int mm_answer_audit_command(int, Buffer *);

+int mm_answer_audit_unsupported_body(int, Buffer *);

+int mm_answer_audit_kex_body(int, Buffer *);

 #endif

 static Authctxt *authctxt;

@@ -225,6 +228,8 @@ struct mon_table mon_dispatch_proto20[] 

 #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},

 #endif

 #ifdef BSD_AUTH

     {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},

@@ -261,6 +266,8 @@ struct mon_table mon_dispatch_postauth20

 #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_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},

+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},

 #endif

     {0, 0, NULL}

 };

@@ -292,6 +299,8 @@ struct mon_table mon_dispatch_proto15[] 

 #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},

 #endif

     {0, 0, NULL}

 };

@@ -303,6 +312,8 @@ struct mon_table mon_dispatch_postauth15

 #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_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},

+    {MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},

 #endif

     {0, 0, NULL}

 };

@@ -2205,3 +2216,40 @@ mm_answer_jpake_check_confirm(int sock, 

 }

 #endif /* JPAKE */

+

+#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;

+

+	ctos = buffer_get_int(m);

+	cipher = buffer_get_string(m, &len;;

+	mac = buffer_get_string(m, &len;;

+	compress = buffer_get_string(m, &len;;

+

+	audit_kex_body(ctos, cipher, mac, compress);

+

+	buffer_clear(m);

+

+	mm_request_send(sock, MONITOR_ANS_AUDIT_KEX, m);

+	return 0;

+}

+

+#endif /* SSH_AUDIT_EVENTS */

diff -up openssh-5.6p1/monitor.h.audit3 openssh-5.6p1/monitor.h

--- openssh-5.6p1/monitor.h.audit3	2008-11-05 06:20:46.000000000 +0100

+++ openssh-5.6p1/monitor.h	2010-12-10 22:17:32.000000000 +0100

@@ -66,6 +66,8 @@ enum monitor_reqtype {

 	MONITOR_REQ_JPAKE_STEP2, MONITOR_ANS_JPAKE_STEP2,

 	MONITOR_REQ_JPAKE_KEY_CONFIRM, MONITOR_ANS_JPAKE_KEY_CONFIRM,

 	MONITOR_REQ_JPAKE_CHECK_CONFIRM, MONITOR_ANS_JPAKE_CHECK_CONFIRM,

+	MONITOR_REQ_AUDIT_UNSUPPORTED, MONITOR_ANS_AUDIT_UNSUPPORTED,

+	MONITOR_REQ_AUDIT_KEX, MONITOR_ANS_AUDIT_KEX,

 };

 struct mm_master;

diff -up openssh-5.6p1/monitor_wrap.c.audit3 openssh-5.6p1/monitor_wrap.c

--- openssh-5.6p1/monitor_wrap.c.audit3	2010-03-07 13:05:17.000000000 +0100

+++ openssh-5.6p1/monitor_wrap.c	2010-12-10 22:17:32.000000000 +0100

@@ -1411,3 +1411,38 @@ mm_jpake_check_confirm(const BIGNUM *k,

 	return success;

 }

 #endif /* JPAKE */

+

+#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)

+{

+	Buffer m;

+

+	buffer_init(&m);

+	buffer_put_int(&m, ctos);

+	buffer_put_cstring(&m, cipher);

+	buffer_put_cstring(&m, mac);

+	buffer_put_cstring(&m, compress);

+

+	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);

+}

+#endif /* SSH_AUDIT_EVENTS */

diff -up openssh-5.6p1/monitor_wrap.h.audit3 openssh-5.6p1/monitor_wrap.h

--- openssh-5.6p1/monitor_wrap.h.audit3	2009-03-05 14:58:22.000000000 +0100

+++ openssh-5.6p1/monitor_wrap.h	2010-12-10 22:17:32.000000000 +0100

@@ -74,6 +74,8 @@ void mm_sshpam_free_ctx(void *);

 #include "audit.h"

 void mm_audit_event(ssh_audit_event_t);

 void mm_audit_run_command(const char *);

+void mm_audit_unsupported_body(int);

+void mm_audit_kex_body(int, char *, char *, char *);

 #endif

 struct Session;

diff -up openssh-5.6p1/sshd.c.audit3 openssh-5.6p1/sshd.c

--- openssh-5.6p1/sshd.c.audit3	2010-04-16 07:56:22.000000000 +0200

+++ openssh-5.6p1/sshd.c	2010-12-10 22:17:32.000000000 +0100

@@ -118,6 +118,7 @@

 #endif

 #include "monitor_wrap.h"

 #include "roaming.h"

+#include "audit.h"

 #include "version.h"

 #ifdef LIBWRAP

@@ -2177,6 +2178,10 @@ do_ssh1_kex(void)

 		if (cookie[i] != packet_get_char())

 			packet_disconnect("IP Spoofing check bytes do not match.");

+#ifdef SSH_AUDIT_EVENTS

+	audit_kex(2, cipher_name(cipher_type), "crc", "none");

+#endif

+

 	debug("Encryption type: %.200s", cipher_name(cipher_type));

 	/* Get the encrypted integer. */