[129549] trunk/dports/net/openssh

ionic at macports.org ionic at macports.org
Mon Dec 15 07:16:10 PST 2014


Revision: 129549
          https://trac.macports.org/changeset/129549
Author:   ionic at macports.org
Date:     2014-12-15 07:16:10 -0800 (Mon, 15 Dec 2014)
Log Message:
-----------
openssh: pull in 6.7-compatible gsskex patch.

Modified Paths:
--------------
    trunk/dports/net/openssh/Portfile

Added Paths:
-----------
    trunk/dports/net/openssh/files/openssh-6.7p1-gsskex-all-20140907.patch

Removed Paths:
-------------
    trunk/dports/net/openssh/files/openssh-6.3p1-gsskex-all-20130920.patch

Modified: trunk/dports/net/openssh/Portfile
===================================================================
--- trunk/dports/net/openssh/Portfile	2014-12-15 15:16:00 UTC (rev 129548)
+++ trunk/dports/net/openssh/Portfile	2014-12-15 15:16:10 UTC (rev 129549)
@@ -142,7 +142,7 @@
 variant gsskex conflicts hpn requires kerberos5 description "Add OpenSSH GSSAPI key exchange patch" {
     use_autoreconf          yes
     patchfiles-append       0002-Apple-keychain-integration-other-changes.patch \
-                            openssh-6.3p1-gsskex-all-20130920.patch
+                            openssh-6.7p1-gsskex-all-20140907.patch
     configure.cppflags-append \
                             -F/System/Library/Frameworks/DirectoryService.framework \
                             -F/System/Library/Frameworks/CoreFoundation.framework \

Deleted: trunk/dports/net/openssh/files/openssh-6.3p1-gsskex-all-20130920.patch
===================================================================
--- trunk/dports/net/openssh/files/openssh-6.3p1-gsskex-all-20130920.patch	2014-12-15 15:16:00 UTC (rev 129548)
+++ trunk/dports/net/openssh/files/openssh-6.3p1-gsskex-all-20130920.patch	2014-12-15 15:16:10 UTC (rev 129549)
@@ -1,2939 +0,0 @@
-diff -Nrup openssh-6.5p1/ChangeLog.gssapi openssh-6.5p1.patched/ChangeLog.gssapi
---- openssh-6.5p1/ChangeLog.gssapi	1969-12-31 16:00:00.000000000 -0800
-+++ openssh-6.5p1.patched/ChangeLog.gssapi	2014-02-15 16:50:46.000000000 -0800
-@@ -0,0 +1,113 @@
-+20110101
-+  - Finally update for OpenSSH 5.6p1
-+  - Add GSSAPIServerIdentity option from Jim Basney
-+ 
-+20100308
-+  - [ Makefile.in, key.c, key.h ]
-+    Updates for OpenSSH 5.4p1
-+  - [ servconf.c ]
-+    Include GSSAPI options in the sshd -T configuration dump, and flag
-+    some older configuration options as being unsupported. Thanks to Colin 
-+    Watson.
-+  -
-+
-+20100124
-+  - [ sshconnect2.c ]
-+    Adapt to deal with additional element in Authmethod structure. Thanks to
-+    Colin Watson
-+
-+20090615
-+  - [ gss-genr.c gss-serv.c kexgssc.c kexgsss.c monitor.c sshconnect2.c
-+      sshd.c ]
-+    Fix issues identified by Greg Hudson following a code review
-+	Check return value of gss_indicate_mechs
-+	Protect GSSAPI calls in monitor, so they can only be used if enabled
-+	Check return values of bignum functions in key exchange
-+	Use BN_clear_free to clear other side's DH value
-+	Make ssh_gssapi_id_kex more robust
-+	Only configure kex table pointers if GSSAPI is enabled
-+	Don't leak mechanism list, or gss mechanism list
-+	Cast data.length before printing
-+	If serverkey isn't provided, use an empty string, rather than NULL
-+
-+20090201
-+  - [ gss-genr.c gss-serv.c kex.h kexgssc.c readconf.c readconf.h ssh-gss.h
-+      ssh_config.5 sshconnet2.c ]
-+    Add support for the GSSAPIClientIdentity option, which allows the user
-+    to specify which GSSAPI identity to use to contact a given server
-+
-+20080404
-+  - [ gss-serv.c ]
-+    Add code to actually implement GSSAPIStrictAcceptCheck, which had somehow
-+    been omitted from a previous version of this patch. Reported by Borislav
-+    Stoichkov
-+
-+20070317
-+  - [ gss-serv-krb5.c ]
-+    Remove C99ism, where new_ccname was being declared in the middle of a 
-+    function
-+
-+20061220
-+  - [ servconf.c ]
-+    Make default for GSSAPIStrictAcceptorCheck be Yes, to match previous, and 
-+    documented, behaviour. Reported by Dan Watson.
-+
-+20060910
-+  - [ gss-genr.c kexgssc.c kexgsss.c kex.h monitor.c sshconnect2.c sshd.c
-+      ssh-gss.h ]
-+    add support for gss-group14-sha1 key exchange mechanisms
-+  - [ gss-serv.c servconf.c servconf.h sshd_config sshd_config.5 ]
-+    Add GSSAPIStrictAcceptorCheck option to allow the disabling of
-+    acceptor principal checking on multi-homed machines.
-+    <Bugzilla #928>
-+  - [ sshd_config ssh_config ]
-+    Add settings for GSSAPIKeyExchange and GSSAPITrustDNS to the sample
-+    configuration files
-+  - [ kexgss.c kegsss.c sshconnect2.c sshd.c ]
-+    Code cleanup. Replace strlen/xmalloc/snprintf sequences with xasprintf()
-+    Limit length of error messages displayed by client
-+
-+20060909
-+  - [ gss-genr.c gss-serv.c ]
-+    move ssh_gssapi_acquire_cred() and ssh_gssapi_server_ctx to be server
-+    only, where they belong 
-+    <Bugzilla #1225>
-+
-+20060829
-+  - [ gss-serv-krb5.c ]
-+    Fix CCAPI credentials cache name when creating KRB5CCNAME environment 
-+    variable
-+
-+20060828
-+  - [ gss-genr.c ]
-+    Avoid Heimdal context freeing problem
-+    <Fixed upstream 20060829>
-+
-+20060818
-+  - [ gss-genr.c ssh-gss.h sshconnect2.c ]
-+    Make sure that SPENGO is disabled 
-+    <Bugzilla #1218 - Fixed upstream 20060818>
-+
-+20060421
-+  - [ gssgenr.c, sshconnect2.c ]
-+    a few type changes (signed versus unsigned, int versus size_t) to
-+    fix compiler errors/warnings 
-+    (from jbasney AT ncsa.uiuc.edu)
-+  - [ kexgssc.c, sshconnect2.c ]
-+    fix uninitialized variable warnings
-+    (from jbasney AT ncsa.uiuc.edu)
-+  - [ gssgenr.c ]
-+    pass oid to gss_display_status (helpful when using GSSAPI mechglue)
-+    (from jbasney AT ncsa.uiuc.edu)
-+    <Bugzilla #1220 >
-+  - [ gss-serv-krb5.c ]
-+    #ifdef HAVE_GSSAPI_KRB5 should be #ifdef HAVE_GSSAPI_KRB5_H
-+    (from jbasney AT ncsa.uiuc.edu)
-+    <Fixed upstream 20060304>
-+  - [ readconf.c, readconf.h, ssh_config.5, sshconnect2.c 
-+    add client-side GssapiKeyExchange option
-+    (from jbasney AT ncsa.uiuc.edu)
-+  - [ sshconnect2.c ]
-+    add support for GssapiTrustDns option for gssapi-with-mic
-+    (from jbasney AT ncsa.uiuc.edu)
-+    <gssapi-with-mic support is Bugzilla #1008>
-diff -Nrup openssh-6.5p1/Makefile.in openssh-6.5p1.patched/Makefile.in
---- openssh-6.5p1/Makefile.in	2014-01-26 22:35:04.000000000 -0800
-+++ openssh-6.5p1.patched/Makefile.in	2014-02-15 16:51:24.000000000 -0800
-@@ -73,6 +73,7 @@ LIBSSH_OBJS=authfd.o authfile.o bufaux.o
- 	atomicio.o key.o dispatch.o kex.o mac.o uidswap.o uuencode.o misc.o \
- 	monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-rsa.o dh.o \
- 	kexdh.o kexgex.o kexdhc.o kexgexc.o bufec.o kexecdh.o kexecdhc.o \
-+	kexgssc.o \
- 	msg.o progressmeter.o dns.o entropy.o gss-genr.o umac.o umac128.o \
- 	ssh-pkcs11.o krl.o smult_curve25519_ref.o \
- 	kexc25519.o kexc25519c.o poly1305.o chacha.o cipher-chachapoly.o \
-@@ -92,7 +93,7 @@ SSHDOBJS=sshd.o auth-rhosts.o auth-passw
- 	auth2-none.o auth2-passwd.o auth2-pubkey.o \
- 	monitor_mm.o monitor.o monitor_wrap.o kexdhs.o kexgexs.o kexecdhs.o \
- 	kexc25519s.o auth-krb5.o \
--	auth2-gss.o gss-serv.o gss-serv-krb5.o \
-+	auth2-gss.o gss-serv.o gss-serv-krb5.o kexgsss.o \
- 	loginrec.o auth-pam.o auth-shadow.o auth-sia.o md5crypt.o \
- 	sftp-server.o sftp-common.o \
- 	roaming_common.o roaming_serv.o \
-diff -Nrup openssh-6.5p1/auth-krb5.c openssh-6.5p1.patched/auth-krb5.c
---- openssh-6.5p1/auth-krb5.c	2013-10-23 16:53:02.000000000 -0700
-+++ openssh-6.5p1.patched/auth-krb5.c	2014-02-15 16:50:46.000000000 -0800
-@@ -182,8 +182,13 @@ auth_krb5_password(Authctxt *authctxt, c
- 
- 	len = strlen(authctxt->krb5_ticket_file) + 6;
- 	authctxt->krb5_ccname = xmalloc(len);
-+#ifdef USE_CCAPI
-+	snprintf(authctxt->krb5_ccname, len, "API:%s",
-+	    authctxt->krb5_ticket_file);
-+#else
- 	snprintf(authctxt->krb5_ccname, len, "FILE:%s",
- 	    authctxt->krb5_ticket_file);
-+#endif
- 
- #ifdef USE_PAM
- 	if (options.use_pam)
-@@ -240,15 +245,22 @@ krb5_cleanup_proc(Authctxt *authctxt)
- #ifndef HEIMDAL
- krb5_error_code
- ssh_krb5_cc_gen(krb5_context ctx, krb5_ccache *ccache) {
--	int tmpfd, ret, oerrno;
-+	int ret;
- 	char ccname[40];
- 	mode_t old_umask;
-+#ifdef USE_CCAPI
-+	char cctemplate[] = "API:krb5cc_%d";
-+#else
-+	char cctemplate[] = "FILE:/tmp/krb5cc_%d_XXXXXXXXXX";
-+	int tmpfd, oerrno;
-+#endif
- 
- 	ret = snprintf(ccname, sizeof(ccname),
--	    "FILE:/tmp/krb5cc_%d_XXXXXXXXXX", geteuid());
-+	    cctemplate, geteuid());
- 	if (ret < 0 || (size_t)ret >= sizeof(ccname))
- 		return ENOMEM;
- 
-+#ifndef USE_CCAPI
- 	old_umask = umask(0177);
- 	tmpfd = mkstemp(ccname + strlen("FILE:"));
- 	oerrno = errno;
-@@ -265,6 +277,7 @@ ssh_krb5_cc_gen(krb5_context ctx, krb5_c
- 		return oerrno;
- 	}
- 	close(tmpfd);
-+#endif
- 
- 	return (krb5_cc_resolve(ctx, ccname, ccache));
- }
-diff -Nrup openssh-6.5p1/auth2-gss.c openssh-6.5p1.patched/auth2-gss.c
---- openssh-6.5p1/auth2-gss.c	2013-06-01 14:31:18.000000000 -0700
-+++ openssh-6.5p1.patched/auth2-gss.c	2014-02-15 16:50:46.000000000 -0800
-@@ -1,7 +1,7 @@
- /* $OpenBSD: auth2-gss.c,v 1.21 2014/02/26 20:28:44 djm Exp $ */
- 
- /*
-- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
-+ * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
-  *
-  * Redistribution and use in source and binary forms, with or without
-  * modification, are permitted provided that the following conditions
-@@ -52,6 +52,40 @@ static void input_gssapi_mic(int type, u
- static void input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt);
- static void input_gssapi_errtok(int, u_int32_t, void *);
- 
-+/* 
-+ * The 'gssapi_keyex' userauth mechanism.
-+ */
-+static int
-+userauth_gsskeyex(Authctxt *authctxt)
-+{
-+	int authenticated = 0;
-+	Buffer b;
-+	gss_buffer_desc mic, gssbuf;
-+	u_int len;
-+
-+	mic.value = packet_get_string(&len);
-+	mic.length = len;
-+
-+	packet_check_eom();
-+
-+	ssh_gssapi_buildmic(&b, authctxt->user, authctxt->service,
-+	    "gssapi-keyex");
-+
-+	gssbuf.value = buffer_ptr(&b);
-+	gssbuf.length = buffer_len(&b);
-+
-+	/* gss_kex_context is NULL with privsep, so we can't check it here */
-+	if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gss_kex_context, 
-+	    &gssbuf, &mic))))
-+		authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user,
-+		    authctxt->pw));
-+	
-+	buffer_free(&b);
-+	free(mic.value);
-+
-+	return (authenticated);
-+}
-+
- /*
-  * We only support those mechanisms that we know about (ie ones that we know
-  * how to check local user kuserok and the like)
-@@ -235,7 +269,8 @@ input_gssapi_exchange_complete(int type,
- 
- 	packet_check_eom();
- 
--	authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
-+	authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user,
-+	    authctxt->pw));
- 
- 	authctxt->postponed = 0;
- 	dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL);
-@@ -270,7 +305,8 @@ input_gssapi_mic(int type, u_int32_t ple
- 	gssbuf.length = buffer_len(&b);
- 
- 	if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gssctxt, &gssbuf, &mic))))
--		authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
-+		authenticated = 
-+		    PRIVSEP(ssh_gssapi_userok(authctxt->user, authctxt->pw));
- 	else
- 		logit("GSSAPI MIC check failed");
- 
-@@ -285,6 +321,12 @@ input_gssapi_mic(int type, u_int32_t ple
- 	userauth_finish(authctxt, authenticated, "gssapi-with-mic", NULL);
- }
- 
-+Authmethod method_gsskeyex = {
-+	"gssapi-keyex",
-+	userauth_gsskeyex,
-+	&options.gss_authentication
-+};
-+
- Authmethod method_gssapi = {
- 	"gssapi-with-mic",
- 	userauth_gssapi,
-diff -Nrup openssh-6.5p1/auth2.c openssh-6.5p1.patched/auth2.c
---- openssh-6.5p1/auth2.c	2013-06-01 14:41:51.000000000 -0700
-+++ openssh-6.5p1.patched/auth2.c	2014-02-15 16:50:46.000000000 -0800
-@@ -69,6 +69,7 @@ extern Authmethod method_passwd;
- extern Authmethod method_kbdint;
- extern Authmethod method_hostbased;
- #ifdef GSSAPI
-+extern Authmethod method_gsskeyex;
- extern Authmethod method_gssapi;
- #endif
-
-@@ -76,6 +77,7 @@ Authmethod *authmethods[] = {
- 	&method_none,
- 	&method_pubkey,
- #ifdef GSSAPI
-+	&method_gsskeyex,
- 	&method_gssapi,
- #endif
- 	&method_passwd,
-diff -Nrup openssh-6.5p1/clientloop.c openssh-6.5p1.patched/clientloop.c
---- openssh-6.5p1/clientloop.c	2013-11-20 18:57:15.000000000 -0800
-+++ openssh-6.5p1.patched/clientloop.c	2014-02-15 16:50:46.000000000 -0800
-@@ -111,6 +111,10 @@
- #include "msg.h"
- #include "roaming.h"
- 
-+#ifdef GSSAPI
-+#include "ssh-gss.h"
-+#endif
-+
- /* import options */
- extern Options options;
- 
-@@ -1634,6 +1638,15 @@ client_loop(int have_pty, int escape_cha
- 		/* Do channel operations unless rekeying in progress. */
- 		if (!rekeying) {
- 			channel_after_select(readset, writeset);
-+
-+#ifdef GSSAPI
-+			if (options.gss_renewal_rekey &&
-+			    ssh_gssapi_credentials_updated(GSS_C_NO_CONTEXT)) {
-+				debug("credentials updated - forcing rekey");
-+				need_rekeying = 1;
-+			}
-+#endif
-+
- 			if (need_rekeying || packet_need_rekeying()) {
- 				debug("need rekeying");
- 				xxx_kex->done = 0;
-diff -Nrup openssh-6.5p1/configure.ac openssh-6.5p1.patched/configure.ac
---- openssh-6.5p1/configure.ac	2014-01-29 16:26:46.000000000 -0800
-+++ openssh-6.5p1.patched/configure.ac	2014-02-15 16:50:46.000000000 -0800
-@@ -584,6 +584,30 @@ main() { if (NSVersionOfRunTimeLibrary("
- 	    [Use tunnel device compatibility to OpenBSD])
- 	AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
- 	    [Prepend the address family to IP tunnel traffic])
-+	AC_MSG_CHECKING(if we have the Security Authorization Session API)
-+	AC_TRY_COMPILE([#include <Security/AuthSession.h>],
-+		[SessionCreate(0, 0);],
-+		[ac_cv_use_security_session_api="yes"
-+		 AC_DEFINE(USE_SECURITY_SESSION_API, 1, 
-+			[platform has the Security Authorization Session API])
-+		 LIBS="$LIBS -framework Security"
-+		 AC_MSG_RESULT(yes)],
-+		[ac_cv_use_security_session_api="no"
-+		 AC_MSG_RESULT(no)])
-+	AC_MSG_CHECKING(if we have an in-memory credentials cache)
-+	AC_TRY_COMPILE(
-+		[#include <Kerberos/Kerberos.h>],
-+		[cc_context_t c;
-+		 (void) cc_initialize (&c, 0, NULL, NULL);],
-+		[AC_DEFINE(USE_CCAPI, 1, 
-+			[platform uses an in-memory credentials cache])
-+		 LIBS="$LIBS -framework Security"
-+		 AC_MSG_RESULT(yes)
-+		 if test "x$ac_cv_use_security_session_api" = "xno"; then
-+			AC_MSG_ERROR(*** Need a security framework to use the credentials cache API ***)
-+		fi],
-+		[AC_MSG_RESULT(no)]
-+	)
- 	m4_pattern_allow([AU_IPv])
- 	AC_CHECK_DECL([AU_IPv4], [], 
- 	    AC_DEFINE([AU_IPv4], [0], [System only supports IPv4 audit records])
-diff -Nrup openssh-6.5p1/gss-genr.c openssh-6.5p1.patched/gss-genr.c
---- openssh-6.5p1/gss-genr.c	2013-11-07 17:19:57.000000000 -0800
-+++ openssh-6.5p1.patched/gss-genr.c	2014-02-15 17:23:28.000000000 -0800
-@@ -1,7 +1,7 @@
- /* $OpenBSD: gss-genr.c,v 1.22 2013/11/08 00:39:15 djm Exp $ */
- 
- /*
-- * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
-+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
-  *
-  * Redistribution and use in source and binary forms, with or without
-  * modification, are permitted provided that the following conditions
-@@ -39,12 +39,167 @@
- #include "buffer.h"
- #include "log.h"
- #include "ssh2.h"
-+#include "cipher.h"
-+#include "key.h"
-+#include "kex.h"
-+#include <openssl/evp.h>
- 
- #include "ssh-gss.h"
- 
- extern u_char *session_id2;
- extern u_int session_id2_len;
- 
-+typedef struct {
-+	char *encoded;
-+	gss_OID oid;
-+} ssh_gss_kex_mapping;
-+
-+/*
-+ * XXX - It would be nice to find a more elegant way of handling the
-+ * XXX   passing of the key exchange context to the userauth routines
-+ */
-+
-+Gssctxt *gss_kex_context = NULL;
-+
-+static ssh_gss_kex_mapping *gss_enc2oid = NULL;
-+
-+int 
-+ssh_gssapi_oid_table_ok() {
-+	return (gss_enc2oid != NULL);
-+}
-+
-+/*
-+ * Return a list of the gss-group1-sha1 mechanisms supported by this program
-+ *
-+ * We test mechanisms to ensure that we can use them, to avoid starting
-+ * a key exchange with a bad mechanism
-+ */
-+
-+char *
-+ssh_gssapi_client_mechanisms(const char *host, const char *client) {
-+	gss_OID_set gss_supported;
-+	OM_uint32 min_status;
-+
-+	if (GSS_ERROR(gss_indicate_mechs(&min_status, &gss_supported)))
-+		return NULL;
-+
-+	return(ssh_gssapi_kex_mechs(gss_supported, ssh_gssapi_check_mechanism,
-+	    host, client));
-+}
-+
-+char *
-+ssh_gssapi_kex_mechs(gss_OID_set gss_supported, ssh_gssapi_check_fn *check,
-+    const char *host, const char *client) {
-+	Buffer buf;
-+	size_t i;
-+	int oidpos, enclen;
-+	char *mechs, *encoded;
-+	u_char digest[EVP_MAX_MD_SIZE];
-+	char deroid[2];
-+	const EVP_MD *evp_md = EVP_md5();
-+	EVP_MD_CTX md;
-+
-+	if (gss_enc2oid != NULL) {
-+		for (i = 0; gss_enc2oid[i].encoded != NULL; i++)
-+			free(gss_enc2oid[i].encoded);
-+		free(gss_enc2oid);
-+	}
-+
-+	gss_enc2oid = xmalloc(sizeof(ssh_gss_kex_mapping) *
-+	    (gss_supported->count + 1));
-+
-+	buffer_init(&buf);
-+
-+	oidpos = 0;
-+	for (i = 0; i < gss_supported->count; i++) {
-+		if (gss_supported->elements[i].length < 128 &&
-+		    (*check)(NULL, &(gss_supported->elements[i]), host, client)) {
-+
-+			deroid[0] = SSH_GSS_OIDTYPE;
-+			deroid[1] = gss_supported->elements[i].length;
-+
-+			EVP_DigestInit(&md, evp_md);
-+			EVP_DigestUpdate(&md, deroid, 2);
-+			EVP_DigestUpdate(&md,
-+			    gss_supported->elements[i].elements,
-+			    gss_supported->elements[i].length);
-+			EVP_DigestFinal(&md, digest, NULL);
-+
-+			encoded = xmalloc(EVP_MD_size(evp_md) * 2);
-+			enclen = __b64_ntop(digest, EVP_MD_size(evp_md),
-+			    encoded, EVP_MD_size(evp_md) * 2);
-+
-+			if (oidpos != 0)
-+				buffer_put_char(&buf, ',');
-+
-+			buffer_append(&buf, KEX_GSS_GEX_SHA1_ID,
-+			    sizeof(KEX_GSS_GEX_SHA1_ID) - 1);
-+			buffer_append(&buf, encoded, enclen);
-+			buffer_put_char(&buf, ',');
-+			buffer_append(&buf, KEX_GSS_GRP1_SHA1_ID, 
-+			    sizeof(KEX_GSS_GRP1_SHA1_ID) - 1);
-+			buffer_append(&buf, encoded, enclen);
-+			buffer_put_char(&buf, ',');
-+			buffer_append(&buf, KEX_GSS_GRP14_SHA1_ID,
-+			    sizeof(KEX_GSS_GRP14_SHA1_ID) - 1);
-+			buffer_append(&buf, encoded, enclen);
-+
-+			gss_enc2oid[oidpos].oid = &(gss_supported->elements[i]);
-+			gss_enc2oid[oidpos].encoded = encoded;
-+			oidpos++;
-+		}
-+	}
-+	gss_enc2oid[oidpos].oid = NULL;
-+	gss_enc2oid[oidpos].encoded = NULL;
-+
-+	buffer_put_char(&buf, '\0');
-+
-+	mechs = xmalloc(buffer_len(&buf));
-+	buffer_get(&buf, mechs, buffer_len(&buf));
-+	buffer_free(&buf);
-+
-+	if (strlen(mechs) == 0) {
-+		free(mechs);
-+		mechs = NULL;
-+	}
-+	
-+	return (mechs);
-+}
-+
-+gss_OID
-+ssh_gssapi_id_kex(Gssctxt *ctx, char *name, int kex_type) {
-+	int i = 0;
-+	
-+	switch (kex_type) {
-+	case KEX_GSS_GRP1_SHA1:
-+		if (strlen(name) < sizeof(KEX_GSS_GRP1_SHA1_ID))
-+			return GSS_C_NO_OID;
-+		name += sizeof(KEX_GSS_GRP1_SHA1_ID) - 1;
-+		break;
-+	case KEX_GSS_GRP14_SHA1:
-+		if (strlen(name) < sizeof(KEX_GSS_GRP14_SHA1_ID))
-+			return GSS_C_NO_OID;
-+		name += sizeof(KEX_GSS_GRP14_SHA1_ID) - 1;
-+		break;
-+	case KEX_GSS_GEX_SHA1:
-+		if (strlen(name) < sizeof(KEX_GSS_GEX_SHA1_ID))
-+			return GSS_C_NO_OID;
-+		name += sizeof(KEX_GSS_GEX_SHA1_ID) - 1;
-+		break;
-+	default:
-+		return GSS_C_NO_OID;
-+	}
-+
-+	while (gss_enc2oid[i].encoded != NULL &&
-+	    strcmp(name, gss_enc2oid[i].encoded) != 0)
-+		i++;
-+
-+	if (gss_enc2oid[i].oid != NULL && ctx != NULL)
-+		ssh_gssapi_set_oid(ctx, gss_enc2oid[i].oid);
-+
-+	return gss_enc2oid[i].oid;
-+}
-+
- /* Check that the OID in a data stream matches that in the context */
- int
- ssh_gssapi_check_oid(Gssctxt *ctx, void *data, size_t len)
-@@ -197,7 +352,7 @@ ssh_gssapi_init_ctx(Gssctxt *ctx, int de
- 	}
- 
- 	ctx->major = gss_init_sec_context(&ctx->minor,
--	    GSS_C_NO_CREDENTIAL, &ctx->context, ctx->name, ctx->oid,
-+	    ctx->client_creds, &ctx->context, ctx->name, ctx->oid,
- 	    GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | deleg_flag,
- 	    0, NULL, recv_tok, NULL, send_tok, flags, NULL);
- 
-@@ -227,8 +382,42 @@ ssh_gssapi_import_name(Gssctxt *ctx, con
- }
- 
- OM_uint32
-+ssh_gssapi_client_identity(Gssctxt *ctx, const char *name)
-+{
-+	gss_buffer_desc gssbuf;
-+	gss_name_t gssname;
-+	OM_uint32 status;
-+	gss_OID_set oidset;
-+
-+	gssbuf.value = (void *) name;
-+	gssbuf.length = strlen(gssbuf.value);
-+
-+	gss_create_empty_oid_set(&status, &oidset);
-+	gss_add_oid_set_member(&status, ctx->oid, &oidset);
-+
-+	ctx->major = gss_import_name(&ctx->minor, &gssbuf,
-+	    GSS_C_NT_USER_NAME, &gssname);
-+
-+	if (!ctx->major)
-+		ctx->major = gss_acquire_cred(&ctx->minor, 
-+		    gssname, 0, oidset, GSS_C_INITIATE, 
-+		    &ctx->client_creds, NULL, NULL);
-+
-+	gss_release_name(&status, &gssname);
-+	gss_release_oid_set(&status, &oidset);
-+
-+	if (ctx->major)
-+		ssh_gssapi_error(ctx);
-+
-+	return(ctx->major);
-+}
-+
-+OM_uint32
- ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_t buffer, gss_buffer_t hash)
- {
-+	if (ctx == NULL) 
-+		return -1;
-+
- 	if ((ctx->major = gss_get_mic(&ctx->minor, ctx->context,
- 	    GSS_C_QOP_DEFAULT, buffer, hash)))
- 		ssh_gssapi_error(ctx);
-@@ -236,6 +425,19 @@ ssh_gssapi_sign(Gssctxt *ctx, gss_buffer
- 	return (ctx->major);
- }
- 
-+/* Priviledged when used by server */
-+OM_uint32
-+ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
-+{
-+	if (ctx == NULL)
-+		return -1;
-+
-+	ctx->major = gss_verify_mic(&ctx->minor, ctx->context,
-+	    gssbuf, gssmic, NULL);
-+
-+	return (ctx->major);
-+}
-+
- void
- ssh_gssapi_buildmic(Buffer *b, const char *user, const char *service,
-     const char *context)
-@@ -249,11 +451,16 @@ ssh_gssapi_buildmic(Buffer *b, const cha
- }
- 
- int
--ssh_gssapi_check_mechanism(Gssctxt **ctx, gss_OID oid, const char *host)
-+ssh_gssapi_check_mechanism(Gssctxt **ctx, gss_OID oid, const char *host, 
-+    const char *client)
- {
- 	gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
- 	OM_uint32 major, minor;
- 	gss_OID_desc spnego_oid = {6, (void *)"\x2B\x06\x01\x05\x05\x02"};
-+	Gssctxt *intctx = NULL;
-+
-+	if (ctx == NULL)
-+		ctx = &intctx;
- 
- 	/* RFC 4462 says we MUST NOT do SPNEGO */
- 	if (oid->length == spnego_oid.length && 
-@@ -263,6 +470,10 @@ ssh_gssapi_check_mechanism(Gssctxt **ctx
- 	ssh_gssapi_build_ctx(ctx);
- 	ssh_gssapi_set_oid(*ctx, oid);
- 	major = ssh_gssapi_import_name(*ctx, host);
-+
-+	if (!GSS_ERROR(major) && client)
-+		major = ssh_gssapi_client_identity(*ctx, client);
-+
- 	if (!GSS_ERROR(major)) {
- 		major = ssh_gssapi_init_ctx(*ctx, 0, GSS_C_NO_BUFFER, &token, 
- 		    NULL);
-@@ -272,10 +483,66 @@ ssh_gssapi_check_mechanism(Gssctxt **ctx
- 			    GSS_C_NO_BUFFER);
- 	}
- 
--	if (GSS_ERROR(major)) 
-+	if (GSS_ERROR(major) || intctx != NULL) 
- 		ssh_gssapi_delete_ctx(ctx);
- 
- 	return (!GSS_ERROR(major));
- }
- 
-+int
-+ssh_gssapi_credentials_updated(Gssctxt *ctxt) {
-+	static gss_name_t saved_name = GSS_C_NO_NAME;
-+	static OM_uint32 saved_lifetime = 0;
-+	static gss_OID saved_mech = GSS_C_NO_OID;
-+	static gss_name_t name;
-+	static OM_uint32 last_call = 0;
-+	OM_uint32 lifetime, now, major, minor;
-+	int equal;
-+
-+	now = time(NULL);
-+
-+	if (ctxt) {
-+		debug("Rekey has happened - updating saved versions");
-+
-+		if (saved_name != GSS_C_NO_NAME)
-+			gss_release_name(&minor, &saved_name);
-+
-+		major = gss_inquire_cred(&minor, GSS_C_NO_CREDENTIAL,
-+		    &saved_name, &saved_lifetime, NULL, NULL);
-+
-+		if (!GSS_ERROR(major)) {
-+			saved_mech = ctxt->oid;
-+		        saved_lifetime+= now;
-+		} else {
-+			/* Handle the error */
-+		}
-+		return 0;
-+	}
-+
-+	if (now - last_call < 10)
-+		return 0;
-+
-+	last_call = now;
-+
-+	if (saved_mech == GSS_C_NO_OID)
-+		return 0;
-+	
-+	major = gss_inquire_cred(&minor, GSS_C_NO_CREDENTIAL, 
-+	    &name, &lifetime, NULL, NULL);
-+	if (major == GSS_S_CREDENTIALS_EXPIRED)
-+		return 0;
-+	else if (GSS_ERROR(major))
-+		return 0;
-+
-+	major = gss_compare_name(&minor, saved_name, name, &equal);
-+	gss_release_name(&minor, &name);
-+	if (GSS_ERROR(major))
-+		return 0;
-+
-+	if (equal && (saved_lifetime < lifetime + now - 10))
-+		return 1;
-+
-+	return 0;
-+}
-+
- #endif /* GSSAPI */
-diff -Nrup openssh-6.5p1/gss-serv-krb5.c openssh-6.5p1.patched/gss-serv-krb5.c
---- openssh-6.5p1/gss-serv-krb5.c	2014-01-19 18:18:09.000000000 -0800
-+++ openssh-6.5p1.patched/gss-serv-krb5.c	2014-02-15 16:50:46.000000000 -0800
-@@ -1,7 +1,7 @@
- /* $OpenBSD: gss-serv-krb5.c,v 1.8 2013/07/20 01:55:13 djm Exp $ */
- 
- /*
-- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
-+ * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
-  *
-  * Redistribution and use in source and binary forms, with or without
-  * modification, are permitted provided that the following conditions
-@@ -122,6 +122,7 @@ ssh_gssapi_krb5_storecreds(ssh_gssapi_cl
- 	OM_uint32 maj_status, min_status;
- 	int len;
- 	const char *errmsg;
-+	const char *new_ccname;
- 
- 	if (client->creds == NULL) {
- 		debug("No credentials stored");
-@@ -180,11 +181,16 @@ ssh_gssapi_krb5_storecreds(ssh_gssapi_cl
- 		return;
- 	}
- 
--	client->store.filename = xstrdup(krb5_cc_get_name(krb_context, ccache));
-+	new_ccname = krb5_cc_get_name(krb_context, ccache);
-+
- 	client->store.envvar = "KRB5CCNAME";
--	len = strlen(client->store.filename) + 6;
--	client->store.envval = xmalloc(len);
--	snprintf(client->store.envval, len, "FILE:%s", client->store.filename);
-+#ifdef USE_CCAPI
-+	xasprintf(&client->store.envval, "API:%s", new_ccname);
-+	client->store.filename = NULL;
-+#else
-+	xasprintf(&client->store.envval, "FILE:%s", new_ccname);
-+	client->store.filename = xstrdup(new_ccname);
-+#endif
- 
- #ifdef USE_PAM
- 	if (options.use_pam)
-@@ -196,6 +202,71 @@ ssh_gssapi_krb5_storecreds(ssh_gssapi_cl
- 	return;
- }
- 
-+int
-+ssh_gssapi_krb5_updatecreds(ssh_gssapi_ccache *store, 
-+    ssh_gssapi_client *client)
-+{
-+	krb5_ccache ccache = NULL;
-+	krb5_principal principal = NULL;
-+	char *name = NULL;
-+	krb5_error_code problem;
-+	OM_uint32 maj_status, min_status;
-+
-+   	if ((problem = krb5_cc_resolve(krb_context, store->envval, &ccache))) {
-+                logit("krb5_cc_resolve(): %.100s",
-+                    krb5_get_err_text(krb_context, problem));
-+                return 0;
-+       	}
-+	
-+	/* Find out who the principal in this cache is */
-+	if ((problem = krb5_cc_get_principal(krb_context, ccache, 
-+	    &principal))) {
-+		logit("krb5_cc_get_principal(): %.100s",
-+		    krb5_get_err_text(krb_context, problem));
-+		krb5_cc_close(krb_context, ccache);
-+		return 0;
-+	}
-+
-+	if ((problem = krb5_unparse_name(krb_context, principal, &name))) {
-+		logit("krb5_unparse_name(): %.100s",
-+		    krb5_get_err_text(krb_context, problem));
-+		krb5_free_principal(krb_context, principal);
-+		krb5_cc_close(krb_context, ccache);
-+		return 0;
-+	}
-+
-+
-+	if (strcmp(name,client->exportedname.value)!=0) {
-+		debug("Name in local credentials cache differs. Not storing");
-+		krb5_free_principal(krb_context, principal);
-+		krb5_cc_close(krb_context, ccache);
-+		krb5_free_unparsed_name(krb_context, name);
-+		return 0;
-+	}
-+	krb5_free_unparsed_name(krb_context, name);
-+
-+	/* Name matches, so lets get on with it! */
-+
-+	if ((problem = krb5_cc_initialize(krb_context, ccache, principal))) {
-+		logit("krb5_cc_initialize(): %.100s",
-+		    krb5_get_err_text(krb_context, problem));
-+		krb5_free_principal(krb_context, principal);
-+		krb5_cc_close(krb_context, ccache);
-+		return 0;
-+	}
-+
-+	krb5_free_principal(krb_context, principal);
-+
-+	if ((maj_status = gss_krb5_copy_ccache(&min_status, client->creds,
-+	    ccache))) {
-+		logit("gss_krb5_copy_ccache() failed. Sorry!");
-+		krb5_cc_close(krb_context, ccache);
-+		return 0;
-+	}
-+
-+	return 1;
-+}
-+
- ssh_gssapi_mech gssapi_kerberos_mech = {
- 	"toWM5Slw5Ew8Mqkay+al2g==",
- 	"Kerberos",
-@@ -203,7 +274,8 @@ ssh_gssapi_mech gssapi_kerberos_mech = {
- 	NULL,
- 	&ssh_gssapi_krb5_userok,
- 	NULL,
--	&ssh_gssapi_krb5_storecreds
-+	&ssh_gssapi_krb5_storecreds,
-+	&ssh_gssapi_krb5_updatecreds
- };
- 
- #endif /* KRB5 */
-diff -Nrup openssh-6.5p1/gss-serv.c openssh-6.5p1.patched/gss-serv.c
---- openssh-6.5p1/gss-serv.c	2013-07-19 20:35:45.000000000 -0700
-+++ openssh-6.5p1.patched/gss-serv.c	2014-02-15 16:50:46.000000000 -0800
-@@ -1,7 +1,7 @@
- /* $OpenBSD: gss-serv.c,v 1.26 2014/02/26 20:28:44 djm Exp $ */
- 
- /*
-- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
-+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
-  *
-  * Redistribution and use in source and binary forms, with or without
-  * modification, are permitted provided that the following conditions
-@@ -45,15 +45,20 @@
- #include "channels.h"
- #include "session.h"
- #include "misc.h"
-+#include "servconf.h"
-+#include "uidswap.h"
- 
- #include "ssh-gss.h"
-+#include "monitor_wrap.h"
-+
-+extern ServerOptions options;
- 
- static ssh_gssapi_client gssapi_client =
-     { GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER,
--    GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL, NULL}};
-+    GSS_C_NO_CREDENTIAL, GSS_C_NO_NAME,  NULL, {NULL, NULL, NULL, NULL}, 0, 0};
- 
- ssh_gssapi_mech gssapi_null_mech =
--    { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL};
-+    { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL, NULL};
- 
- #ifdef KRB5
- extern ssh_gssapi_mech gssapi_kerberos_mech;
-@@ -100,25 +105,32 @@ ssh_gssapi_acquire_cred(Gssctxt *ctx)
- 	char lname[MAXHOSTNAMELEN];
- 	gss_OID_set oidset;
- 
--	gss_create_empty_oid_set(&status, &oidset);
--	gss_add_oid_set_member(&status, ctx->oid, &oidset);
-+	if (options.gss_strict_acceptor) {
-+		gss_create_empty_oid_set(&status, &oidset);
-+		gss_add_oid_set_member(&status, ctx->oid, &oidset);
-+
-+		if (gethostname(lname, MAXHOSTNAMELEN)) {
-+			gss_release_oid_set(&status, &oidset);
-+			return (-1);
-+		}
- 
--	if (gethostname(lname, MAXHOSTNAMELEN)) {
--		gss_release_oid_set(&status, &oidset);
--		return (-1);
--	}
-+		if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
-+			gss_release_oid_set(&status, &oidset);
-+			return (ctx->major);
-+		}
-+
-+		if ((ctx->major = gss_acquire_cred(&ctx->minor,
-+		    ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, 
-+		    NULL, NULL)))
-+			ssh_gssapi_error(ctx);
- 
--	if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
- 		gss_release_oid_set(&status, &oidset);
- 		return (ctx->major);
-+	} else {
-+		ctx->name = GSS_C_NO_NAME;
-+		ctx->creds = GSS_C_NO_CREDENTIAL;
- 	}
--
--	if ((ctx->major = gss_acquire_cred(&ctx->minor,
--	    ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, NULL, NULL)))
--		ssh_gssapi_error(ctx);
--
--	gss_release_oid_set(&status, &oidset);
--	return (ctx->major);
-+	return GSS_S_COMPLETE;
- }
- 
- /* Privileged */
-@@ -133,6 +145,29 @@ ssh_gssapi_server_ctx(Gssctxt **ctx, gss
- }
- 
- /* Unprivileged */
-+char *
-+ssh_gssapi_server_mechanisms() {
-+	gss_OID_set	supported;
-+
-+	ssh_gssapi_supported_oids(&supported);
-+	return (ssh_gssapi_kex_mechs(supported, &ssh_gssapi_server_check_mech,
-+	    NULL, NULL));
-+}
-+
-+/* Unprivileged */
-+int
-+ssh_gssapi_server_check_mech(Gssctxt **dum, gss_OID oid, const char *data,
-+    const char *dummy) {
-+	Gssctxt *ctx = NULL;
-+	int res;
-+ 
-+	res = !GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctx, oid)));
-+	ssh_gssapi_delete_ctx(&ctx);
-+
-+	return (res);
-+}
-+
-+/* Unprivileged */
- void
- ssh_gssapi_supported_oids(gss_OID_set *oidset)
- {
-@@ -142,7 +177,9 @@ ssh_gssapi_supported_oids(gss_OID_set *o
- 	gss_OID_set supported;
- 
- 	gss_create_empty_oid_set(&min_status, oidset);
--	gss_indicate_mechs(&min_status, &supported);
-+
-+	if (GSS_ERROR(gss_indicate_mechs(&min_status, &supported)))
-+		return;
- 
- 	while (supported_mechs[i]->name != NULL) {
- 		if (GSS_ERROR(gss_test_oid_set_member(&min_status,
-@@ -268,8 +305,48 @@ OM_uint32
- ssh_gssapi_getclient(Gssctxt *ctx, ssh_gssapi_client *client)
- {
- 	int i = 0;
-+	int equal = 0;
-+	gss_name_t new_name = GSS_C_NO_NAME;
-+	gss_buffer_desc ename = GSS_C_EMPTY_BUFFER;
-+
-+	if (options.gss_store_rekey && client->used && ctx->client_creds) {
-+		if (client->mech->oid.length != ctx->oid->length ||
-+		    (memcmp(client->mech->oid.elements,
-+		     ctx->oid->elements, ctx->oid->length) !=0)) {
-+			debug("Rekeyed credentials have different mechanism");
-+			return GSS_S_COMPLETE;
-+		}
-+
-+		if ((ctx->major = gss_inquire_cred_by_mech(&ctx->minor, 
-+		    ctx->client_creds, ctx->oid, &new_name, 
-+		    NULL, NULL, NULL))) {
-+			ssh_gssapi_error(ctx);
-+			return (ctx->major);
-+		}
-+
-+		ctx->major = gss_compare_name(&ctx->minor, client->name, 
-+		    new_name, &equal);
- 
--	gss_buffer_desc ename;
-+		if (GSS_ERROR(ctx->major)) {
-+			ssh_gssapi_error(ctx);
-+			return (ctx->major);
-+		}
-+ 
-+		if (!equal) {
-+			debug("Rekeyed credentials have different name");
-+			return GSS_S_COMPLETE;
-+		}
-+
-+		debug("Marking rekeyed credentials for export");
-+
-+		gss_release_name(&ctx->minor, &client->name);
-+		gss_release_cred(&ctx->minor, &client->creds);
-+		client->name = new_name;
-+		client->creds = ctx->client_creds;
-+        	ctx->client_creds = GSS_C_NO_CREDENTIAL;
-+		client->updated = 1;
-+		return GSS_S_COMPLETE;
-+	}
- 
- 	client->mech = NULL;
- 
-@@ -284,6 +361,13 @@ ssh_gssapi_getclient(Gssctxt *ctx, ssh_g
- 	if (client->mech == NULL)
- 		return GSS_S_FAILURE;
- 
-+	if (ctx->client_creds &&
-+	    (ctx->major = gss_inquire_cred_by_mech(&ctx->minor,
-+	     ctx->client_creds, ctx->oid, &client->name, NULL, NULL, NULL))) {
-+		ssh_gssapi_error(ctx);
-+		return (ctx->major);
-+	}
-+
- 	if ((ctx->major = gss_display_name(&ctx->minor, ctx->client,
- 	    &client->displayname, NULL))) {
- 		ssh_gssapi_error(ctx);
-@@ -301,6 +385,8 @@ ssh_gssapi_getclient(Gssctxt *ctx, ssh_g
- 		return (ctx->major);
- 	}
- 
-+	gss_release_buffer(&ctx->minor, &ename);
-+
- 	/* We can't copy this structure, so we just move the pointer to it */
- 	client->creds = ctx->client_creds;
- 	ctx->client_creds = GSS_C_NO_CREDENTIAL;
-@@ -348,7 +434,7 @@ ssh_gssapi_do_child(char ***envp, u_int 
- 
- /* Privileged */
- int
--ssh_gssapi_userok(char *user)
-+ssh_gssapi_userok(char *user, struct passwd *pw)
- {
- 	OM_uint32 lmin;
- 
-@@ -358,9 +444,11 @@ ssh_gssapi_userok(char *user)
- 		return 0;
- 	}
- 	if (gssapi_client.mech && gssapi_client.mech->userok)
--		if ((*gssapi_client.mech->userok)(&gssapi_client, user))
-+		if ((*gssapi_client.mech->userok)(&gssapi_client, user)) {
-+			gssapi_client.used = 1;
-+			gssapi_client.store.owner = pw;
- 			return 1;
--		else {
-+		} else {
- 			/* Destroy delegated credentials if userok fails */
- 			gss_release_buffer(&lmin, &gssapi_client.displayname);
- 			gss_release_buffer(&lmin, &gssapi_client.exportedname);
-@@ -374,14 +462,90 @@ ssh_gssapi_userok(char *user)
- 	return (0);
- }
- 
--/* Privileged */
--OM_uint32
--ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
-+/* These bits are only used for rekeying. The unpriviledged child is running 
-+ * as the user, the monitor is root.
-+ *
-+ * In the child, we want to :
-+ *    *) Ask the monitor to store our credentials into the store we specify
-+ *    *) If it succeeds, maybe do a PAM update
-+ */
-+
-+/* Stuff for PAM */
-+
-+#ifdef USE_PAM
-+static int ssh_gssapi_simple_conv(int n, const struct pam_message **msg, 
-+    struct pam_response **resp, void *data)
- {
--	ctx->major = gss_verify_mic(&ctx->minor, ctx->context,
--	    gssbuf, gssmic, NULL);
-+	return (PAM_CONV_ERR);
-+}
-+#endif
- 
--	return (ctx->major);
-+void
-+ssh_gssapi_rekey_creds() {
-+	int ok;
-+	int ret;
-+#ifdef USE_PAM
-+	pam_handle_t *pamh = NULL;
-+	struct pam_conv pamconv = {ssh_gssapi_simple_conv, NULL};
-+	char *envstr;
-+#endif
-+
-+	if (gssapi_client.store.filename == NULL && 
-+	    gssapi_client.store.envval == NULL &&
-+	    gssapi_client.store.envvar == NULL)
-+		return;
-+ 
-+	ok = PRIVSEP(ssh_gssapi_update_creds(&gssapi_client.store));
-+
-+	if (!ok)
-+		return;
-+
-+	debug("Rekeyed credentials stored successfully");
-+
-+	/* Actually managing to play with the ssh pam stack from here will
-+	 * be next to impossible. In any case, we may want different options
-+	 * for rekeying. So, use our own :)
-+	 */
-+#ifdef USE_PAM	
-+	if (!use_privsep) {
-+		debug("Not even going to try and do PAM with privsep disabled");
-+		return;
-+	}
-+
-+	ret = pam_start("sshd-rekey", gssapi_client.store.owner->pw_name,
-+ 	    &pamconv, &pamh);
-+	if (ret)
-+		return;
-+
-+	xasprintf(&envstr, "%s=%s", gssapi_client.store.envvar, 
-+	    gssapi_client.store.envval);
-+
-+	ret = pam_putenv(pamh, envstr);
-+	if (!ret)
-+		pam_setcred(pamh, PAM_REINITIALIZE_CRED);
-+	pam_end(pamh, PAM_SUCCESS);
-+#endif
-+}
-+
-+int 
-+ssh_gssapi_update_creds(ssh_gssapi_ccache *store) {
-+	int ok = 0;
-+
-+	/* Check we've got credentials to store */
-+	if (!gssapi_client.updated)
-+		return 0;
-+
-+	gssapi_client.updated = 0;
-+
-+	temporarily_use_uid(gssapi_client.store.owner);
-+	if (gssapi_client.mech && gssapi_client.mech->updatecreds)
-+		ok = (*gssapi_client.mech->updatecreds)(store, &gssapi_client);
-+	else
-+		debug("No update function for this mechanism");
-+
-+	restore_uid();
-+
-+	return ok;
- }
- 
- #endif
-diff -Nrup openssh-6.5p1/kex.c openssh-6.5p1.patched/kex.c
---- openssh-6.5p1/kex.c	2014-01-25 14:38:04.000000000 -0800
-+++ openssh-6.5p1.patched/kex.c	2014-02-15 17:24:33.000000000 -0800
-@@ -51,6 +51,10 @@
- #include "roaming.h"
- #include "digest.h"
- 
-+#ifdef GSSAPI
-+#include "ssh-gss.h"
-+#endif
-+
- #if OPENSSL_VERSION_NUMBER >= 0x00907000L
- # if defined(HAVE_EVP_SHA256)
- # define evp_ssh_sha256 EVP_sha256
-@@ -90,6 +94,11 @@ static const struct kexalg kexalgs[] = {
- #ifdef HAVE_EVP_SHA256
- 	{ KEX_CURVE25519_SHA256, KEX_C25519_SHA256, 0, SSH_DIGEST_SHA256 },
- #endif
-+#ifdef GSSAPI
-+	{ KEX_GSS_GEX_SHA1_ID, KEX_GSS_GEX_SHA1, 0, SSH_DIGEST_SHA1 },
-+	{ KEX_GSS_GRP1_SHA1_ID, KEX_GSS_GRP1_SHA1, 0, SSH_DIGEST_SHA1 },
-+	{ KEX_GSS_GRP14_SHA1_ID, KEX_GSS_GRP14_SHA1, 0, SSH_DIGEST_SHA1 },
-+#endif
- 	{ NULL, -1, -1, -1},
- };
- 
-diff -Nrup openssh-6.5p1/kex.h openssh-6.5p1.patched/kex.h
---- openssh-6.5p1/kex.h	2014-01-25 14:37:26.000000000 -0800
-+++ openssh-6.5p1.patched/kex.h	2014-02-15 16:52:30.000000000 -0800
-@@ -76,6 +76,9 @@ enum kex_exchange {
- 	KEX_DH_GEX_SHA256,
- 	KEX_ECDH_SHA2,
- 	KEX_C25519_SHA256,
-+	KEX_GSS_GRP1_SHA1,
-+	KEX_GSS_GRP14_SHA1,
-+	KEX_GSS_GEX_SHA1,
- 	KEX_MAX
- };
- 
-@@ -135,6 +138,12 @@ struct Kex {
- 	int	flags;
- 	int	hash_alg;
- 	int	ec_nid;
-+#ifdef GSSAPI
-+	int	gss_deleg_creds;
-+	int	gss_trust_dns;
-+	char    *gss_host;
-+	char	*gss_client;
-+#endif
- 	char	*client_version_string;
- 	char	*server_version_string;
- 	int	(*verify_host_key)(Key *);
-@@ -167,6 +176,11 @@ void	 kexecdh_server(Kex *);
- void	 kexc25519_client(Kex *);
- void	 kexc25519_server(Kex *);
- 
-+#ifdef GSSAPI
-+void	kexgss_client(Kex *);
-+void	kexgss_server(Kex *);
-+#endif
-+
- void
- kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
-     BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
-diff -Nrup openssh-6.5p1/kexgssc.c openssh-6.5p1.patched/kexgssc.c
---- openssh-6.5p1/kexgssc.c	1969-12-31 16:00:00.000000000 -0800
-+++ openssh-6.5p1.patched/kexgssc.c	2014-02-15 17:17:35.000000000 -0800
-@@ -0,0 +1,339 @@
-+/*
-+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
-+ *
-+ * 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.
-+ */
-+
-+#include "includes.h"
-+
-+#ifdef GSSAPI
-+
-+#include "includes.h"
-+
-+#include <openssl/crypto.h>
-+#include <openssl/bn.h>
-+
-+#include <string.h>
-+
-+#include "xmalloc.h"
-+#include "buffer.h"
-+#include "ssh2.h"
-+#include "key.h"
-+#include "cipher.h"
-+#include "kex.h"
-+#include "log.h"
-+#include "packet.h"
-+#include "dh.h"
-+
-+#include "ssh-gss.h"
-+
-+void
-+kexgss_client(Kex *kex) {
-+	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
-+	gss_buffer_desc recv_tok, gssbuf, msg_tok, *token_ptr;
-+	Gssctxt *ctxt;
-+	OM_uint32 maj_status, min_status, ret_flags;
-+	u_int klen, kout, slen = 0, hashlen, strlen;
-+	DH *dh; 
-+	BIGNUM *dh_server_pub = NULL;
-+	BIGNUM *shared_secret = NULL;
-+	Buffer shared_secret_buffer;
-+	BIGNUM *p = NULL;
-+	BIGNUM *g = NULL;	
-+	u_char *kbuf, *hash;
-+	u_char *serverhostkey = NULL;
-+	u_char *empty = "";
-+	char *msg;
-+	char *lang;
-+	int type = 0;
-+	int first = 1;
-+	int nbits = 0, min = DH_GRP_MIN, max = DH_GRP_MAX;
-+
-+	/* Initialise our GSSAPI world */	
-+	ssh_gssapi_build_ctx(&ctxt);
-+	if (ssh_gssapi_id_kex(ctxt, kex->name, kex->kex_type) 
-+	    == GSS_C_NO_OID)
-+		fatal("Couldn't identify host exchange");
-+
-+	if (ssh_gssapi_import_name(ctxt, kex->gss_host))
-+		fatal("Couldn't import hostname");
-+
-+	if (kex->gss_client && 
-+	    ssh_gssapi_client_identity(ctxt, kex->gss_client))
-+		fatal("Couldn't acquire client credentials");
-+
-+	switch (kex->kex_type) {
-+	case KEX_GSS_GRP1_SHA1:
-+		dh = dh_new_group1();
-+		break;
-+	case KEX_GSS_GRP14_SHA1:
-+		dh = dh_new_group14();
-+		break;
-+	case KEX_GSS_GEX_SHA1:
-+		debug("Doing group exchange\n");
-+		nbits = dh_estimate(kex->we_need * 8);
-+		packet_start(SSH2_MSG_KEXGSS_GROUPREQ);
-+		packet_put_int(min);
-+		packet_put_int(nbits);
-+		packet_put_int(max);
-+
-+		packet_send();
-+
-+		packet_read_expect(SSH2_MSG_KEXGSS_GROUP);
-+
-+		if ((p = BN_new()) == NULL)
-+			fatal("BN_new() failed");
-+		packet_get_bignum2(p);
-+		if ((g = BN_new()) == NULL)
-+			fatal("BN_new() failed");
-+		packet_get_bignum2(g);
-+		packet_check_eom();
-+
-+		if (BN_num_bits(p) < min || BN_num_bits(p) > max)
-+			fatal("GSSGRP_GEX group out of range: %d !< %d !< %d",
-+			    min, BN_num_bits(p), max);
-+
-+		dh = dh_new_group(g, p);
-+		break;
-+	default:
-+		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
-+	}
-+	
-+	/* Step 1 - e is dh->pub_key */
-+	dh_gen_key(dh, kex->we_need * 8);
-+
-+	/* This is f, we initialise it now to make life easier */
-+	dh_server_pub = BN_new();
-+	if (dh_server_pub == NULL)
-+		fatal("dh_server_pub == NULL");
-+
-+	token_ptr = GSS_C_NO_BUFFER;
-+			 
-+	do {
-+		debug("Calling gss_init_sec_context");
-+		
-+		maj_status = ssh_gssapi_init_ctx(ctxt,
-+		    kex->gss_deleg_creds, token_ptr, &send_tok,
-+		    &ret_flags);
-+
-+		if (GSS_ERROR(maj_status)) {
-+			if (send_tok.length != 0) {
-+				packet_start(SSH2_MSG_KEXGSS_CONTINUE);
-+				packet_put_string(send_tok.value,
-+				    send_tok.length);
-+			}
-+			fatal("gss_init_context failed");
-+		}
-+
-+		/* If we've got an old receive buffer get rid of it */
-+		if (token_ptr != GSS_C_NO_BUFFER)
-+			free(recv_tok.value);
-+
-+		if (maj_status == GSS_S_COMPLETE) {
-+			/* If mutual state flag is not true, kex fails */
-+			if (!(ret_flags & GSS_C_MUTUAL_FLAG))
-+				fatal("Mutual authentication failed");
-+
-+			/* If integ avail flag is not true kex fails */
-+			if (!(ret_flags & GSS_C_INTEG_FLAG))
-+				fatal("Integrity check failed");
-+		}
-+
-+		/* 
-+		 * If we have data to send, then the last message that we
-+		 * received cannot have been a 'complete'. 
-+		 */
-+		if (send_tok.length != 0) {
-+			if (first) {
-+				packet_start(SSH2_MSG_KEXGSS_INIT);
-+				packet_put_string(send_tok.value,
-+				    send_tok.length);
-+				packet_put_bignum2(dh->pub_key);
-+				first = 0;
-+			} else {
-+				packet_start(SSH2_MSG_KEXGSS_CONTINUE);
-+				packet_put_string(send_tok.value,
-+				    send_tok.length);
-+			}
-+			packet_send();
-+			gss_release_buffer(&min_status, &send_tok);
-+
-+			/* If we've sent them data, they should reply */
-+			do {	
-+				type = packet_read();
-+				if (type == SSH2_MSG_KEXGSS_HOSTKEY) {
-+					debug("Received KEXGSS_HOSTKEY");
-+					if (serverhostkey)
-+						fatal("Server host key received more than once");
-+					serverhostkey = 
-+					    packet_get_string(&slen);
-+				}
-+			} while (type == SSH2_MSG_KEXGSS_HOSTKEY);
-+
-+			switch (type) {
-+			case SSH2_MSG_KEXGSS_CONTINUE:
-+				debug("Received GSSAPI_CONTINUE");
-+				if (maj_status == GSS_S_COMPLETE) 
-+					fatal("GSSAPI Continue received from server when complete");
-+				recv_tok.value = packet_get_string(&strlen);
-+				recv_tok.length = strlen; 
-+				break;
-+			case SSH2_MSG_KEXGSS_COMPLETE:
-+				debug("Received GSSAPI_COMPLETE");
-+				packet_get_bignum2(dh_server_pub);
-+				msg_tok.value =  packet_get_string(&strlen);
-+				msg_tok.length = strlen; 
-+
-+				/* Is there a token included? */
-+				if (packet_get_char()) {
-+					recv_tok.value=
-+					    packet_get_string(&strlen);
-+					recv_tok.length = strlen;
-+					/* If we're already complete - protocol error */
-+					if (maj_status == GSS_S_COMPLETE)
-+						packet_disconnect("Protocol error: received token when complete");
-+					} else {
-+						/* No token included */
-+						if (maj_status != GSS_S_COMPLETE)
-+							packet_disconnect("Protocol error: did not receive final token");
-+				}
-+				break;
-+			case SSH2_MSG_KEXGSS_ERROR:
-+				debug("Received Error");
-+				maj_status = packet_get_int();
-+				min_status = packet_get_int();
-+				msg = packet_get_string(NULL);
-+				lang = packet_get_string(NULL);
-+				fatal("GSSAPI Error: \n%.400s",msg);
-+			default:
-+				packet_disconnect("Protocol error: didn't expect packet type %d",
-+		    		type);
-+			}
-+			token_ptr = &recv_tok;
-+		} else {
-+			/* No data, and not complete */
-+			if (maj_status != GSS_S_COMPLETE)
-+				fatal("Not complete, and no token output");
-+		}
-+	} while (maj_status & GSS_S_CONTINUE_NEEDED);
-+
-+	/* 
-+	 * We _must_ have received a COMPLETE message in reply from the 
-+	 * server, which will have set dh_server_pub and msg_tok 
-+	 */
-+
-+	if (type != SSH2_MSG_KEXGSS_COMPLETE)
-+		fatal("Didn't receive a SSH2_MSG_KEXGSS_COMPLETE when I expected it");
-+
-+	/* Check f in range [1, p-1] */
-+	if (!dh_pub_is_valid(dh, dh_server_pub))
-+		packet_disconnect("bad server public DH value");
-+
-+	/* compute K=f^x mod p */
-+	klen = DH_size(dh);
-+	kbuf = xmalloc(klen);
-+	kout = DH_compute_key(kbuf, dh_server_pub, dh);
-+	if (kout < 0)
-+		fatal("DH_compute_key: failed");
-+
-+	shared_secret = BN_new();
-+	if (shared_secret == NULL)
-+		fatal("kexgss_client: BN_new failed");
-+
-+	if (BN_bin2bn(kbuf, kout, shared_secret) == NULL)
-+		fatal("kexdh_client: BN_bin2bn failed");
-+
-+	memset(kbuf, 0, klen);
-+	free(kbuf);
-+
-+	switch (kex->kex_type) {
-+	case KEX_GSS_GRP1_SHA1:
-+	case KEX_GSS_GRP14_SHA1:
-+		kex_dh_hash( kex->client_version_string, 
-+		    kex->server_version_string,
-+		    buffer_ptr(&kex->my), buffer_len(&kex->my),
-+		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
-+		    (serverhostkey ? serverhostkey : empty), slen,
-+		    dh->pub_key,	/* e */
-+		    dh_server_pub,	/* f */
-+		    shared_secret,	/* K */
-+		    &hash, &hashlen
-+		);
-+		break;
-+	case KEX_GSS_GEX_SHA1:
-+		kexgex_hash(
-+		    kex->hash_alg,
-+		    kex->client_version_string,
-+		    kex->server_version_string,
-+		    buffer_ptr(&kex->my), buffer_len(&kex->my),
-+		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
-+		    (serverhostkey ? serverhostkey : empty), slen,
-+ 		    min, nbits, max,
-+		    dh->p, dh->g,
-+		    dh->pub_key,
-+		    dh_server_pub,
-+		    shared_secret,
-+		    &hash, &hashlen
-+		);
-+		break;
-+	default:
-+		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
-+	}
-+
-+	gssbuf.value = hash;
-+	gssbuf.length = hashlen;
-+
-+	/* Verify that the hash matches the MIC we just got. */
-+	if (GSS_ERROR(ssh_gssapi_checkmic(ctxt, &gssbuf, &msg_tok)))
-+		packet_disconnect("Hash's MIC didn't verify");
-+
-+	free(msg_tok.value);
-+
-+	DH_free(dh);
-+	if (serverhostkey)
-+		free(serverhostkey);
-+	BN_clear_free(dh_server_pub);
-+
-+	/* save session id */
-+	if (kex->session_id == NULL) {
-+		kex->session_id_len = hashlen;
-+		kex->session_id = xmalloc(kex->session_id_len);
-+		memcpy(kex->session_id, hash, kex->session_id_len);
-+	}
-+
-+	if (kex->gss_deleg_creds)
-+		ssh_gssapi_credentials_updated(ctxt);
-+
-+	if (gss_kex_context == NULL)
-+		gss_kex_context = ctxt;
-+	else
-+		ssh_gssapi_delete_ctx(&ctxt);
-+
-+	buffer_init(&shared_secret_buffer);
-+	buffer_put_bignum2(&shared_secret_buffer, shared_secret);
-+	kex_derive_keys(kex, hash, hashlen, buffer_ptr(&shared_secret_buffer),
-+			buffer_len(&shared_secret_buffer));
-+	buffer_free(&shared_secret_buffer);
-+	BN_clear_free(shared_secret);
-+	kex_finish(kex);
-+}
-+
-+#endif /* GSSAPI */
-diff -Nrup openssh-6.5p1/kexgsss.c openssh-6.5p1.patched/kexgsss.c
---- openssh-6.5p1/kexgsss.c	1969-12-31 16:00:00.000000000 -0800
-+++ openssh-6.5p1.patched/kexgsss.c	2014-02-15 17:31:24.000000000 -0800
-@@ -0,0 +1,293 @@
-+/*
-+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
-+ *
-+ * 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.
-+ */
-+
-+#include "includes.h"
-+
-+#ifdef GSSAPI
-+
-+#include <string.h>
-+
-+#include <openssl/crypto.h>
-+#include <openssl/bn.h>
-+
-+#include "xmalloc.h"
-+#include "buffer.h"
-+#include "ssh2.h"
-+#include "key.h"
-+#include "cipher.h"
-+#include "kex.h"
-+#include "log.h"
-+#include "packet.h"
-+#include "dh.h"
-+#include "ssh-gss.h"
-+#include "monitor_wrap.h"
-+#include "servconf.h"
-+
-+extern ServerOptions options;
-+
-+void
-+kexgss_server(Kex *kex)
-+{
-+	OM_uint32 maj_status, min_status;
-+	
-+	/* 
-+	 * Some GSSAPI implementations use the input value of ret_flags (an
-+ 	 * output variable) as a means of triggering mechanism specific 
-+ 	 * features. Initializing it to zero avoids inadvertently 
-+ 	 * activating this non-standard behaviour.
-+	 */
-+
-+	OM_uint32 ret_flags = 0;
-+	gss_buffer_desc gssbuf, recv_tok, msg_tok;
-+	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
-+	Gssctxt *ctxt = NULL;
-+	u_int slen, klen, kout, hashlen;
-+	u_char *kbuf, *hash;
-+	DH *dh;
-+	int min = -1, max = -1, nbits = -1;
-+	BIGNUM *shared_secret = NULL;
-+	Buffer shared_secret_buffer;
-+	BIGNUM *dh_client_pub = NULL;
-+	int type = 0;
-+	gss_OID oid;
-+	char *mechs;
-+
-+	/* Initialise GSSAPI */
-+
-+	/* If we're rekeying, privsep means that some of the private structures
-+	 * in the GSSAPI code are no longer available. This kludges them back
-+	 * into life
-+	 */
-+	if (!ssh_gssapi_oid_table_ok()) 
-+		if ((mechs = ssh_gssapi_server_mechanisms()))
-+			free(mechs);
-+
-+	debug2("%s: Identifying %s", __func__, kex->name);
-+	oid = ssh_gssapi_id_kex(NULL, kex->name, kex->kex_type);
-+	if (oid == GSS_C_NO_OID)
-+	   fatal("Unknown gssapi mechanism");
-+
-+	debug2("%s: Acquiring credentials", __func__);
-+
-+	if (GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctxt, oid))))
-+		fatal("Unable to acquire credentials for the server");
-+
-+	switch (kex->kex_type) {
-+	case KEX_GSS_GRP1_SHA1:
-+		dh = dh_new_group1();
-+		break;
-+	case KEX_GSS_GRP14_SHA1:
-+		dh = dh_new_group14();
-+		break;
-+	case KEX_GSS_GEX_SHA1:
-+		debug("Doing group exchange");
-+		packet_read_expect(SSH2_MSG_KEXGSS_GROUPREQ);
-+		min = packet_get_int();
-+		nbits = packet_get_int();
-+		max = packet_get_int();
-+		min = MAX(DH_GRP_MIN, min);
-+		max = MIN(DH_GRP_MAX, max);
-+		packet_check_eom();
-+		if (max < min || nbits < min || max < nbits)
-+			fatal("GSS_GEX, bad parameters: %d !< %d !< %d",
-+			    min, nbits, max);
-+		dh = PRIVSEP(choose_dh(min, nbits, max));
-+		if (dh == NULL)
-+			packet_disconnect("Protocol error: no matching group found");
-+
-+		packet_start(SSH2_MSG_KEXGSS_GROUP);
-+		packet_put_bignum2(dh->p);
-+		packet_put_bignum2(dh->g);
-+		packet_send();
-+
-+		packet_write_wait();
-+		break;
-+	default:
-+		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
-+	}
-+
-+	dh_gen_key(dh, kex->we_need * 8);
-+
-+	do {
-+		debug("Wait SSH2_MSG_GSSAPI_INIT");
-+		type = packet_read();
-+		switch(type) {
-+		case SSH2_MSG_KEXGSS_INIT:
-+			if (dh_client_pub != NULL) 
-+				fatal("Received KEXGSS_INIT after initialising");
-+			recv_tok.value = packet_get_string(&slen);
-+			recv_tok.length = slen; 
-+
-+			if ((dh_client_pub = BN_new()) == NULL)
-+				fatal("dh_client_pub == NULL");
-+
-+			packet_get_bignum2(dh_client_pub);
-+
-+			/* Send SSH_MSG_KEXGSS_HOSTKEY here, if we want */
-+			break;
-+		case SSH2_MSG_KEXGSS_CONTINUE:
-+			recv_tok.value = packet_get_string(&slen);
-+			recv_tok.length = slen; 
-+			break;
-+		default:
-+			packet_disconnect(
-+			    "Protocol error: didn't expect packet type %d",
-+			    type);
-+		}
-+
-+		maj_status = PRIVSEP(ssh_gssapi_accept_ctx(ctxt, &recv_tok, 
-+		    &send_tok, &ret_flags));
-+
-+		free(recv_tok.value);
-+
-+		if (maj_status != GSS_S_COMPLETE && send_tok.length == 0)
-+			fatal("Zero length token output when incomplete");
-+
-+		if (dh_client_pub == NULL)
-+			fatal("No client public key");
-+		
-+		if (maj_status & GSS_S_CONTINUE_NEEDED) {
-+			debug("Sending GSSAPI_CONTINUE");
-+			packet_start(SSH2_MSG_KEXGSS_CONTINUE);
-+			packet_put_string(send_tok.value, send_tok.length);
-+			packet_send();
-+			gss_release_buffer(&min_status, &send_tok);
-+		}
-+	} while (maj_status & GSS_S_CONTINUE_NEEDED);
-+
-+	if (GSS_ERROR(maj_status)) {
-+		if (send_tok.length > 0) {
-+			packet_start(SSH2_MSG_KEXGSS_CONTINUE);
-+			packet_put_string(send_tok.value, send_tok.length);
-+			packet_send();
-+		}
-+		fatal("accept_ctx died");
-+	}
-+
-+	if (!(ret_flags & GSS_C_MUTUAL_FLAG))
-+		fatal("Mutual Authentication flag wasn't set");
-+
-+	if (!(ret_flags & GSS_C_INTEG_FLAG))
-+		fatal("Integrity flag wasn't set");
-+	
-+	if (!dh_pub_is_valid(dh, dh_client_pub))
-+		packet_disconnect("bad client public DH value");
-+
-+	klen = DH_size(dh);
-+	kbuf = xmalloc(klen); 
-+	kout = DH_compute_key(kbuf, dh_client_pub, dh);
-+	if (kout < 0)
-+		fatal("DH_compute_key: failed");
-+
-+	shared_secret = BN_new();
-+	if (shared_secret == NULL)
-+		fatal("kexgss_server: BN_new failed");
-+
-+	if (BN_bin2bn(kbuf, kout, shared_secret) == NULL)
-+		fatal("kexgss_server: BN_bin2bn failed");
-+
-+	memset(kbuf, 0, klen);
-+	free(kbuf);
-+
-+	switch (kex->kex_type) {
-+	case KEX_GSS_GRP1_SHA1:
-+	case KEX_GSS_GRP14_SHA1:
-+		kex_dh_hash(
-+		    kex->client_version_string, kex->server_version_string,
-+		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
-+		    buffer_ptr(&kex->my), buffer_len(&kex->my),
-+		    NULL, 0, /* Change this if we start sending host keys */
-+		    dh_client_pub, dh->pub_key, shared_secret,
-+		    &hash, &hashlen
-+		);
-+		break;
-+	case KEX_GSS_GEX_SHA1:
-+		kexgex_hash(
-+		    kex->hash_alg,
-+		    kex->client_version_string, kex->server_version_string,
-+		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
-+		    buffer_ptr(&kex->my), buffer_len(&kex->my),
-+		    NULL, 0,
-+		    min, nbits, max,
-+		    dh->p, dh->g,
-+		    dh_client_pub,
-+		    dh->pub_key,
-+		    shared_secret,
-+		    &hash, &hashlen
-+		);
-+		break;
-+	default:
-+		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
-+	}
-+
-+	BN_clear_free(dh_client_pub);
-+
-+	if (kex->session_id == NULL) {
-+		kex->session_id_len = hashlen;
-+		kex->session_id = xmalloc(kex->session_id_len);
-+		memcpy(kex->session_id, hash, kex->session_id_len);
-+	}
-+
-+	gssbuf.value = hash;
-+	gssbuf.length = hashlen;
-+
-+	if (GSS_ERROR(PRIVSEP(ssh_gssapi_sign(ctxt,&gssbuf,&msg_tok))))
-+		fatal("Couldn't get MIC");
-+
-+	packet_start(SSH2_MSG_KEXGSS_COMPLETE);
-+	packet_put_bignum2(dh->pub_key);
-+	packet_put_string(msg_tok.value,msg_tok.length);
-+
-+	if (send_tok.length != 0) {
-+		packet_put_char(1); /* true */
-+		packet_put_string(send_tok.value, send_tok.length);
-+	} else {
-+		packet_put_char(0); /* false */
-+	}
-+	packet_send();
-+
-+	gss_release_buffer(&min_status, &send_tok);
-+	gss_release_buffer(&min_status, &msg_tok);
-+
-+	if (gss_kex_context == NULL)
-+		gss_kex_context = ctxt;
-+	else 
-+		ssh_gssapi_delete_ctx(&ctxt);
-+
-+	DH_free(dh);
-+
-+	buffer_init(&shared_secret_buffer);
-+	buffer_put_bignum2(&shared_secret_buffer, shared_secret);
-+	kex_derive_keys(kex, hash, hashlen, buffer_ptr(&shared_secret_buffer),
-+			buffer_len(&shared_secret_buffer));
-+	buffer_free(&shared_secret_buffer);
-+	BN_clear_free(shared_secret);
-+	kex_finish(kex);
-+
-+	/* If this was a rekey, then save out any delegated credentials we
-+	 * just exchanged.  */
-+	if (options.gss_store_rekey)
-+		ssh_gssapi_rekey_creds();
-+}
-+#endif /* GSSAPI */
-diff -Nrup openssh-6.5p1/key.c openssh-6.5p1.patched/key.c
---- openssh-6.5p1/key.c	2014-01-09 15:58:53.000000000 -0800
-+++ openssh-6.5p1.patched/key.c	2014-02-15 16:50:46.000000000 -0800
-@@ -979,6 +979,7 @@ static const struct keytype keytypes[] =
- 	    KEY_ECDSA_CERT, NID_secp521r1, 1 },
- # endif
- #endif /* OPENSSL_HAS_ECC */
-+	{ "null", "null", KEY_NULL, 0, 0 },
- 	{ "ssh-rsa-cert-v00 at openssh.com", "RSA-CERT-V00",
- 	    KEY_RSA_CERT_V00, 0, 1 },
- 	{ "ssh-dss-cert-v00 at openssh.com", "DSA-CERT-V00",
-diff -Nrup openssh-6.5p1/key.h openssh-6.5p1.patched/key.h
---- openssh-6.5p1/key.h	2014-01-09 15:58:53.000000000 -0800
-+++ openssh-6.5p1.patched/key.h	2014-02-15 16:50:46.000000000 -0800
-@@ -46,6 +46,7 @@ enum types {
- 	KEY_ED25519_CERT,
- 	KEY_RSA_CERT_V00,
- 	KEY_DSA_CERT_V00,
-+	KEY_NULL,
- 	KEY_UNSPEC
- };
- enum fp_type {
-diff -Nrup openssh-6.5p1/monitor.c openssh-6.5p1.patched/monitor.c
---- openssh-6.5p1/monitor.c	2013-11-06 18:32:52.000000000 -0800
-+++ openssh-6.5p1.patched/monitor.c	2014-02-15 16:53:04.000000000 -0800
-@@ -175,6 +175,8 @@ int mm_answer_gss_setup_ctx(int, Buffer 
- int mm_answer_gss_accept_ctx(int, Buffer *);
- 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
-@@ -247,11 +249,18 @@ struct mon_table mon_dispatch_proto20[] 
-     {MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx},
-     {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
-     {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic},
-+    {MONITOR_REQ_GSSSIGN, MON_ONCE, mm_answer_gss_sign},
- #endif
-     {0, 0, NULL}
- };
- 
- struct mon_table mon_dispatch_postauth20[] = {
-+#ifdef GSSAPI
-+    {MONITOR_REQ_GSSSETUP, 0, mm_answer_gss_setup_ctx},
-+    {MONITOR_REQ_GSSSTEP, 0, mm_answer_gss_accept_ctx},
-+    {MONITOR_REQ_GSSSIGN, 0, mm_answer_gss_sign},
-+    {MONITOR_REQ_GSSUPCREDS, 0, mm_answer_gss_updatecreds},
-+#endif
-     {MONITOR_REQ_MODULI, 0, mm_answer_moduli},
-     {MONITOR_REQ_SIGN, 0, mm_answer_sign},
-     {MONITOR_REQ_PTY, 0, mm_answer_pty},
-@@ -360,6 +369,10 @@ monitor_child_preauth(Authctxt *_authctx
- 		/* Permit requests for moduli and signatures */
- 		monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
- 		monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
-+#ifdef GSSAPI
-+		/* and for the GSSAPI key exchange */
-+		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP, 1);
-+#endif
- 	} else {
- 		mon_dispatch = mon_dispatch_proto15;
- 
-@@ -465,6 +478,10 @@ monitor_child_postauth(struct monitor *p
- 		monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
- 		monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
- 		monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
-+#ifdef GSSAPI
-+		/* and for the GSSAPI key exchange */
-+		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP, 1);
-+#endif		
- 	} else {
- 		mon_dispatch = mon_dispatch_postauth15;
- 		monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
-@@ -1834,6 +1851,13 @@ mm_get_kex(Buffer *m)
- 	kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
- 	kex->kex[KEX_ECDH_SHA2] = kexecdh_server;
- 	kex->kex[KEX_C25519_SHA256] = kexc25519_server;
-+#ifdef GSSAPI
-+	if (options.gss_keyex) {
-+		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
-+		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_server;
-+		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_server;
-+	}
-+#endif
- 	kex->server = 1;
- 	kex->hostkey_type = buffer_get_int(m);
- 	kex->kex_type = buffer_get_int(m);
-@@ -2041,6 +2065,9 @@ mm_answer_gss_setup_ctx(int sock, Buffer
- 	OM_uint32 major;
- 	u_int len;
- 
-+	if (!options.gss_authentication && !options.gss_keyex)
-+		fatal("In GSSAPI monitor when GSSAPI is disabled");
-+
- 	goid.elements = buffer_get_string(m, &len);
- 	goid.length = len;
- 
-@@ -2068,6 +2095,9 @@ mm_answer_gss_accept_ctx(int sock, Buffe
- 	OM_uint32 flags = 0; /* GSI needs this */
- 	u_int len;
- 
-+	if (!options.gss_authentication && !options.gss_keyex)
-+		fatal("In GSSAPI monitor when GSSAPI is disabled");
-+
- 	in.value = buffer_get_string(m, &len);
- 	in.length = len;
- 	major = ssh_gssapi_accept_ctx(gsscontext, &in, &out, &flags);
-@@ -2085,6 +2115,7 @@ mm_answer_gss_accept_ctx(int sock, Buffe
- 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 0);
- 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSUSEROK, 1);
- 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSCHECKMIC, 1);
-+		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
- 	}
- 	return (0);
- }
-@@ -2096,6 +2127,9 @@ mm_answer_gss_checkmic(int sock, Buffer 
- 	OM_uint32 ret;
- 	u_int len;
- 
-+	if (!options.gss_authentication && !options.gss_keyex)
-+		fatal("In GSSAPI monitor when GSSAPI is disabled");
-+
- 	gssbuf.value = buffer_get_string(m, &len);
- 	gssbuf.length = len;
- 	mic.value = buffer_get_string(m, &len);
-@@ -2122,7 +2156,11 @@ mm_answer_gss_userok(int sock, Buffer *m
- {
- 	int authenticated;
- 
--	authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user);
-+	if (!options.gss_authentication && !options.gss_keyex)
-+		fatal("In GSSAPI monitor when GSSAPI is disabled");
-+
-+	authenticated = authctxt->valid && 
-+	    ssh_gssapi_userok(authctxt->user, authctxt->pw);
- 
- 	buffer_clear(m);
- 	buffer_put_int(m, authenticated);
-@@ -2135,5 +2173,73 @@ mm_answer_gss_userok(int sock, Buffer *m
- 	/* Monitor loop will terminate if authenticated */
- 	return (authenticated);
- }
-+
-+int 
-+mm_answer_gss_sign(int socket, Buffer *m)
-+{
-+	gss_buffer_desc data;
-+	gss_buffer_desc hash = GSS_C_EMPTY_BUFFER;
-+	OM_uint32 major, minor;
-+	u_int len;
-+
-+	if (!options.gss_authentication && !options.gss_keyex)
-+		fatal("In GSSAPI monitor when GSSAPI is disabled");
-+
-+	data.value = buffer_get_string(m, &len);
-+	data.length = len;
-+	if (data.length != 20) 
-+		fatal("%s: data length incorrect: %d", __func__, 
-+		    (int) data.length);
-+
-+	/* Save the session ID on the first time around */
-+	if (session_id2_len == 0) {
-+		session_id2_len = data.length;
-+		session_id2 = xmalloc(session_id2_len);
-+		memcpy(session_id2, data.value, session_id2_len);
-+	}
-+	major = ssh_gssapi_sign(gsscontext, &data, &hash);
-+
-+	free(data.value);
-+
-+	buffer_clear(m);
-+	buffer_put_int(m, major);
-+	buffer_put_string(m, hash.value, hash.length);
-+
-+	mm_request_send(socket, MONITOR_ANS_GSSSIGN, m);
-+
-+	gss_release_buffer(&minor, &hash);
-+
-+	/* Turn on getpwnam permissions */
-+	monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
-+	
-+	/* And credential updating, for when rekeying */
-+	monitor_permit(mon_dispatch, MONITOR_REQ_GSSUPCREDS, 1);
-+
-+	return (0);
-+}
-+
-+int
-+mm_answer_gss_updatecreds(int socket, Buffer *m) {
-+	ssh_gssapi_ccache store;
-+	int ok;
-+
-+	store.filename = buffer_get_string(m, NULL);
-+	store.envvar   = buffer_get_string(m, NULL);
-+	store.envval   = buffer_get_string(m, NULL);
-+
-+	ok = ssh_gssapi_update_creds(&store);
-+
-+	free(store.filename);
-+	free(store.envvar);
-+	free(store.envval);
-+
-+	buffer_clear(m);
-+	buffer_put_int(m, ok);
-+
-+	mm_request_send(socket, MONITOR_ANS_GSSUPCREDS, m);
-+
-+	return(0);
-+}
-+
- #endif /* GSSAPI */
- 
-diff -Nrup openssh-6.5p1/monitor.h openssh-6.5p1.patched/monitor.h
---- openssh-6.5p1/monitor.h	2012-12-02 14:53:21.000000000 -0800
-+++ openssh-6.5p1.patched/monitor.h	2014-02-15 16:50:46.000000000 -0800
-@@ -57,6 +57,9 @@ enum monitor_reqtype {
- 	MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49,
- 	MONITOR_REQ_TERM = 50,
- 
-+	MONITOR_REQ_GSSSIGN = 62, MONITOR_ANS_GSSSIGN = 63,
-+	MONITOR_REQ_GSSUPCREDS = 64, MONITOR_ANS_GSSUPCREDS = 65,
-+
- 	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,
-diff -Nrup openssh-6.5p1/monitor_wrap.c openssh-6.5p1.patched/monitor_wrap.c
---- openssh-6.5p1/monitor_wrap.c	2013-11-06 18:35:39.000000000 -0800
-+++ openssh-6.5p1.patched/monitor_wrap.c	2014-02-15 16:50:46.000000000 -0800
-@@ -1271,7 +1271,7 @@ mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss
- }
- 
- int
--mm_ssh_gssapi_userok(char *user)
-+mm_ssh_gssapi_userok(char *user, struct passwd *pw)
- {
- 	Buffer m;
- 	int authenticated = 0;
-@@ -1288,5 +1288,50 @@ mm_ssh_gssapi_userok(char *user)
- 	debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
- 	return (authenticated);
- }
-+
-+OM_uint32
-+mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
-+{
-+	Buffer m;
-+	OM_uint32 major;
-+	u_int len;
-+
-+	buffer_init(&m);
-+	buffer_put_string(&m, data->value, data->length);
-+
-+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
-+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
-+
-+	major = buffer_get_int(&m);
-+	hash->value = buffer_get_string(&m, &len);
-+	hash->length = len;
-+
-+	buffer_free(&m);
-+
-+	return(major);
-+}
-+
-+int
-+mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
-+{
-+	Buffer m;
-+	int ok;
-+
-+	buffer_init(&m);
-+
-+	buffer_put_cstring(&m, store->filename ? store->filename : "");
-+	buffer_put_cstring(&m, store->envvar ? store->envvar : "");
-+	buffer_put_cstring(&m, store->envval ? store->envval : "");
-+	
-+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
-+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
-+
-+	ok = buffer_get_int(&m);
-+
-+	buffer_free(&m);
-+	
-+	return (ok);
-+}
-+
- #endif /* GSSAPI */
- 
-diff -Nrup openssh-6.5p1/monitor_wrap.h openssh-6.5p1.patched/monitor_wrap.h
---- openssh-6.5p1/monitor_wrap.h	2011-06-19 21:42:23.000000000 -0700
-+++ openssh-6.5p1.patched/monitor_wrap.h	2014-02-15 16:50:46.000000000 -0800
-@@ -58,8 +58,10 @@ BIGNUM *mm_auth_rsa_generate_challenge(K
- 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 *);
--int mm_ssh_gssapi_userok(char *user);
-+int mm_ssh_gssapi_userok(char *user, struct passwd *);
- OM_uint32 mm_ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
-+OM_uint32 mm_ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
-+int mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *);
- #endif
- 
- #ifdef USE_PAM
-diff -Nrup openssh-6.5p1/readconf.c openssh-6.5p1.patched/readconf.c
---- openssh-6.5p1/readconf.c	2014-01-17 05:03:57.000000000 -0800
-+++ openssh-6.5p1.patched/readconf.c	2014-02-15 16:50:46.000000000 -0800
-@@ -141,6 +141,8 @@ typedef enum {
- 	oClearAllForwardings, oNoHostAuthenticationForLocalhost,
- 	oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
- 	oAddressFamily, oGssAuthentication, oGssDelegateCreds,
-+	oGssTrustDns, oGssKeyEx, oGssClientIdentity, oGssRenewalRekey,
-+	oGssServerIdentity, 
- 	oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
- 	oSendEnv, oControlPath, oControlMaster, oControlPersist,
- 	oHashKnownHosts,
-@@ -186,10 +188,19 @@ static struct {
- 	{ "afstokenpassing", oUnsupported },
- #if defined(GSSAPI)
- 	{ "gssapiauthentication", oGssAuthentication },
-+	{ "gssapikeyexchange", oGssKeyEx },
- 	{ "gssapidelegatecredentials", oGssDelegateCreds },
-+	{ "gssapitrustdns", oGssTrustDns },
-+	{ "gssapiclientidentity", oGssClientIdentity },
-+	{ "gssapiserveridentity", oGssServerIdentity },
-+	{ "gssapirenewalforcesrekey", oGssRenewalRekey },
- #else
- 	{ "gssapiauthentication", oUnsupported },
-+	{ "gssapikeyexchange", oUnsupported },
- 	{ "gssapidelegatecredentials", oUnsupported },
-+	{ "gssapitrustdns", oUnsupported },
-+	{ "gssapiclientidentity", oUnsupported },
-+	{ "gssapirenewalforcesrekey", oUnsupported },
- #endif
- 	{ "fallbacktorsh", oDeprecated },
- 	{ "usersh", oDeprecated },
-@@ -847,10 +858,30 @@ parse_time:
- 		intptr = &options->gss_authentication;
- 		goto parse_flag;
- 
-+	case oGssKeyEx:
-+		intptr = &options->gss_keyex;
-+		goto parse_flag;
-+
- 	case oGssDelegateCreds:
- 		intptr = &options->gss_deleg_creds;
- 		goto parse_flag;
- 
-+	case oGssTrustDns:
-+		intptr = &options->gss_trust_dns;
-+		goto parse_flag;
-+
-+	case oGssClientIdentity:
-+		charptr = &options->gss_client_identity;
-+		goto parse_string;
-+
-+	case oGssServerIdentity:
-+		charptr = &options->gss_server_identity;
-+		goto parse_string;
-+
-+	case oGssRenewalRekey:
-+		intptr = &options->gss_renewal_rekey;
-+		goto parse_flag;
-+
- 	case oBatchMode:
- 		intptr = &options->batch_mode;
- 		goto parse_flag;
-@@ -1509,7 +1540,12 @@ initialize_options(Options * options)
- 	options->pubkey_authentication = -1;
- 	options->challenge_response_authentication = -1;
- 	options->gss_authentication = -1;
-+	options->gss_keyex = -1;
- 	options->gss_deleg_creds = -1;
-+	options->gss_trust_dns = -1;
-+	options->gss_renewal_rekey = -1;
-+	options->gss_client_identity = NULL;
-+	options->gss_server_identity = NULL;
- 	options->password_authentication = -1;
- 	options->kbd_interactive_authentication = -1;
- 	options->kbd_interactive_devices = NULL;
-@@ -1631,8 +1667,14 @@ fill_default_options(Options * options)
- 		options->challenge_response_authentication = 1;
- 	if (options->gss_authentication == -1)
- 		options->gss_authentication = 0;
-+	if (options->gss_keyex == -1)
-+		options->gss_keyex = 0;
- 	if (options->gss_deleg_creds == -1)
- 		options->gss_deleg_creds = 0;
-+	if (options->gss_trust_dns == -1)
-+		options->gss_trust_dns = 0;
-+	if (options->gss_renewal_rekey == -1)
-+		options->gss_renewal_rekey = 0;
- 	if (options->password_authentication == -1)
- 		options->password_authentication = 1;
- 	if (options->kbd_interactive_authentication == -1)
-diff -Nrup openssh-6.5p1/readconf.h openssh-6.5p1.patched/readconf.h
---- openssh-6.5p1/readconf.h	2013-10-16 17:48:14.000000000 -0700
-+++ openssh-6.5p1.patched/readconf.h	2014-02-15 16:50:46.000000000 -0800
-@@ -54,7 +54,12 @@ typedef struct {
- 	int     challenge_response_authentication;
- 					/* Try S/Key or TIS, authentication. */
- 	int     gss_authentication;	/* Try GSS authentication */
-+	int     gss_keyex;		/* Try GSS key exchange */
- 	int     gss_deleg_creds;	/* Delegate GSS credentials */
-+	int	gss_trust_dns;		/* Trust DNS for GSS canonicalization */
-+	int	gss_renewal_rekey;	/* Credential renewal forces rekey */
-+	char    *gss_client_identity;   /* Principal to initiate GSSAPI with */
-+	char    *gss_server_identity;   /* GSSAPI target principal */
- 	int     password_authentication;	/* Try password
- 						 * authentication. */
- 	int     kbd_interactive_authentication; /* Try keyboard-interactive auth. */
-diff -Nrup openssh-6.5p1/servconf.c openssh-6.5p1.patched/servconf.c
---- openssh-6.5p1/servconf.c	2013-12-06 16:24:02.000000000 -0800
-+++ openssh-6.5p1.patched/servconf.c	2014-02-15 16:50:46.000000000 -0800
-@@ -108,7 +108,10 @@ initialize_server_options(ServerOptions 
- 	options->kerberos_ticket_cleanup = -1;
- 	options->kerberos_get_afs_token = -1;
- 	options->gss_authentication=-1;
-+	options->gss_keyex = -1;
- 	options->gss_cleanup_creds = -1;
-+	options->gss_strict_acceptor = -1;
-+	options->gss_store_rekey = -1;
- 	options->password_authentication = -1;
- 	options->kbd_interactive_authentication = -1;
- 	options->challenge_response_authentication = -1;
-@@ -244,8 +247,14 @@ fill_default_server_options(ServerOption
- 		options->kerberos_get_afs_token = 0;
- 	if (options->gss_authentication == -1)
- 		options->gss_authentication = 0;
-+	if (options->gss_keyex == -1)
-+		options->gss_keyex = 0;
- 	if (options->gss_cleanup_creds == -1)
- 		options->gss_cleanup_creds = 1;
-+	if (options->gss_strict_acceptor == -1)
-+		options->gss_strict_acceptor = 1;
-+	if (options->gss_store_rekey == -1)
-+		options->gss_store_rekey = 0;
- 	if (options->password_authentication == -1)
- 		options->password_authentication = 0;
- 	if (options->kbd_interactive_authentication == -1)
-@@ -340,7 +349,9 @@ typedef enum {
- 	sBanner, sUseDNS, sHostbasedAuthentication,
- 	sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
- 	sClientAliveCountMax, sAuthorizedKeysFile,
--	sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
-+	sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
-+	sGssKeyEx, sGssStoreRekey,
-+	sAcceptEnv, sPermitTunnel,
- 	sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
- 	sUsePrivilegeSeparation, sAllowAgentForwarding,
- 	sHostCertificate,
-@@ -407,10 +418,20 @@ static struct {
- #ifdef GSSAPI
- 	{ "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
- 	{ "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
-+	{ "gssapicleanupcreds", sGssCleanupCreds, SSHCFG_GLOBAL },
-+	{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
-+	{ "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL },
-+	{ "gssapistorecredentialsonrekey", sGssStoreRekey, SSHCFG_GLOBAL },
- #else
- 	{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
- 	{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
-+	{ "gssapicleanupcreds", sUnsupported, SSHCFG_GLOBAL },
-+	{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
-+	{ "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL },
-+	{ "gssapistorecredentialsonrekey", sUnsupported, SSHCFG_GLOBAL },
- #endif
-+	{ "gssusesessionccache", sUnsupported, SSHCFG_GLOBAL },
-+	{ "gssapiusesessioncredcache", sUnsupported, SSHCFG_GLOBAL },
- 	{ "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
- 	{ "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
- 	{ "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
-@@ -1086,10 +1107,22 @@ process_server_config_line(ServerOptions
- 		intptr = &options->gss_authentication;
- 		goto parse_flag;
- 
-+	case sGssKeyEx:
-+		intptr = &options->gss_keyex;
-+		goto parse_flag;
-+
- 	case sGssCleanupCreds:
- 		intptr = &options->gss_cleanup_creds;
- 		goto parse_flag;
- 
-+	case sGssStrictAcceptor:
-+		intptr = &options->gss_strict_acceptor;
-+		goto parse_flag;
-+
-+	case sGssStoreRekey:
-+		intptr = &options->gss_store_rekey;
-+		goto parse_flag;
-+
- 	case sPasswordAuthentication:
- 		intptr = &options->password_authentication;
- 		goto parse_flag;
-@@ -1995,7 +2028,10 @@ dump_config(ServerOptions *o)
- #endif
- #ifdef GSSAPI
- 	dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
-+	dump_cfg_fmtint(sGssKeyEx, o->gss_keyex);
- 	dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
-+	dump_cfg_fmtint(sGssStrictAcceptor, o->gss_strict_acceptor);
-+	dump_cfg_fmtint(sGssStoreRekey, o->gss_store_rekey);
- #endif
- 	dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
- 	dump_cfg_fmtint(sKbdInteractiveAuthentication,
-diff -Nrup openssh-6.5p1/servconf.h openssh-6.5p1.patched/servconf.h
---- openssh-6.5p1/servconf.h	2013-12-04 19:07:28.000000000 -0800
-+++ openssh-6.5p1.patched/servconf.h	2014-02-15 16:50:46.000000000 -0800
-@@ -112,7 +112,10 @@ typedef struct {
- 	int     kerberos_get_afs_token;		/* If true, try to get AFS token if
- 						 * authenticated with Kerberos. */
- 	int     gss_authentication;	/* If true, permit GSSAPI authentication */
-+	int     gss_keyex;		/* If true, permit GSSAPI key exchange */
- 	int     gss_cleanup_creds;	/* If true, destroy cred cache on logout */
-+	int 	gss_strict_acceptor;	/* If true, restrict the GSSAPI acceptor name */
-+	int 	gss_store_rekey;
- 	int     password_authentication;	/* If true, permit password
- 						 * authentication. */
- 	int     kbd_interactive_authentication;	/* If true, permit */
-diff -Nrup openssh-6.5p1/ssh-gss.h openssh-6.5p1.patched/ssh-gss.h
---- openssh-6.5p1/ssh-gss.h	2013-02-24 16:24:44.000000000 -0800
-+++ openssh-6.5p1.patched/ssh-gss.h	2014-02-15 16:50:46.000000000 -0800
-@@ -1,6 +1,6 @@
- /* $OpenBSD: ssh-gss.h,v 1.11 2014/02/26 20:28:44 djm Exp $ */
- /*
-- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
-+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
-  *
-  * Redistribution and use in source and binary forms, with or without
-  * modification, are permitted provided that the following conditions
-@@ -61,10 +61,22 @@
- 
- #define SSH_GSS_OIDTYPE 0x06
- 
-+#define SSH2_MSG_KEXGSS_INIT                            30
-+#define SSH2_MSG_KEXGSS_CONTINUE                        31
-+#define SSH2_MSG_KEXGSS_COMPLETE                        32
-+#define SSH2_MSG_KEXGSS_HOSTKEY                         33
-+#define SSH2_MSG_KEXGSS_ERROR                           34
-+#define SSH2_MSG_KEXGSS_GROUPREQ			40
-+#define SSH2_MSG_KEXGSS_GROUP				41
-+#define KEX_GSS_GRP1_SHA1_ID				"gss-group1-sha1-"
-+#define KEX_GSS_GRP14_SHA1_ID				"gss-group14-sha1-"
-+#define KEX_GSS_GEX_SHA1_ID				"gss-gex-sha1-"
-+
- typedef struct {
- 	char *filename;
- 	char *envvar;
- 	char *envval;
-+	struct passwd *owner;
- 	void *data;
- } ssh_gssapi_ccache;
- 
-@@ -72,8 +84,11 @@ typedef struct {
- 	gss_buffer_desc displayname;
- 	gss_buffer_desc exportedname;
- 	gss_cred_id_t creds;
-+	gss_name_t name;
- 	struct ssh_gssapi_mech_struct *mech;
- 	ssh_gssapi_ccache store;
-+	int used;
-+	int updated;
- } ssh_gssapi_client;
- 
- typedef struct ssh_gssapi_mech_struct {
-@@ -84,6 +99,7 @@ typedef struct ssh_gssapi_mech_struct {
- 	int (*userok) (ssh_gssapi_client *, char *);
- 	int (*localname) (ssh_gssapi_client *, char **);
- 	void (*storecreds) (ssh_gssapi_client *);
-+	int (*updatecreds) (ssh_gssapi_ccache *, ssh_gssapi_client *);
- } ssh_gssapi_mech;
- 
- typedef struct {
-@@ -94,10 +110,11 @@ typedef struct {
- 	gss_OID		oid; /* client */
- 	gss_cred_id_t	creds; /* server */
- 	gss_name_t	client; /* server */
--	gss_cred_id_t	client_creds; /* server */
-+	gss_cred_id_t	client_creds; /* both */
- } Gssctxt;
- 
- extern ssh_gssapi_mech *supported_mechs[];
-+extern Gssctxt *gss_kex_context;
- 
- int  ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
- void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
-@@ -119,16 +136,30 @@ void ssh_gssapi_build_ctx(Gssctxt **);
- void ssh_gssapi_delete_ctx(Gssctxt **);
- OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
- void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
--int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *);
-+int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *, const char *);
-+OM_uint32 ssh_gssapi_client_identity(Gssctxt *, const char *);
-+int ssh_gssapi_credentials_updated(Gssctxt *);
- 
- /* In the server */
-+typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *, 
-+    const char *);
-+char *ssh_gssapi_client_mechanisms(const char *, const char *);
-+char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *,
-+    const char *);
-+gss_OID ssh_gssapi_id_kex(Gssctxt *, char *, int);
-+int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *, 
-+    const char *);
- OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
--int ssh_gssapi_userok(char *name);
-+int ssh_gssapi_userok(char *name, struct passwd *);
- OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
- void ssh_gssapi_do_child(char ***, u_int *);
- void ssh_gssapi_cleanup_creds(void);
- void ssh_gssapi_storecreds(void);
- 
-+char *ssh_gssapi_server_mechanisms(void);
-+int ssh_gssapi_oid_table_ok();
-+
-+int ssh_gssapi_update_creds(ssh_gssapi_ccache *store);
- #endif /* GSSAPI */
- 
- #endif /* _SSH_GSS_H */
-diff -Nrup openssh-6.5p1/ssh_config openssh-6.5p1.patched/ssh_config
---- openssh-6.5p1/ssh_config	2013-10-09 16:24:12.000000000 -0700
-+++ openssh-6.5p1.patched/ssh_config	2014-02-15 16:50:46.000000000 -0800
-@@ -26,6 +26,8 @@
- #   HostbasedAuthentication no
- #   GSSAPIAuthentication no
- #   GSSAPIDelegateCredentials no
-+#   GSSAPIKeyExchange no
-+#   GSSAPITrustDNS no
- #   BatchMode no
- #   CheckHostIP yes
- #   AddressFamily any
-diff -Nrup openssh-6.5p1/ssh_config.5 openssh-6.5p1.patched/ssh_config.5
---- openssh-6.5p1/ssh_config.5	2014-01-19 03:36:14.000000000 -0800
-+++ openssh-6.5p1.patched/ssh_config.5	2014-02-15 16:50:46.000000000 -0800
-@@ -682,11 +682,43 @@ Specifies whether user authentication ba
- The default is
- .Dq no .
- Note that this option applies to protocol version 2 only.
-+.It Cm GSSAPIKeyExchange
-+Specifies whether key exchange based on GSSAPI may be used. When using
-+GSSAPI key exchange the server need not have a host key.
-+The default is
-+.Dq no .
-+Note that this option applies to protocol version 2 only.
-+.It Cm GSSAPIClientIdentity
-+If set, specifies the GSSAPI client identity that ssh should use when 
-+connecting to the server. The default is unset, which means that the default 
-+identity will be used.
-+.It Cm GSSAPIServerIdentity
-+If set, specifies the GSSAPI server identity that ssh should expect when 
-+connecting to the server. The default is unset, which means that the
-+expected GSSAPI server identity will be determined from the target
-+hostname.
- .It Cm GSSAPIDelegateCredentials
- Forward (delegate) credentials to the server.
- The default is
- .Dq no .
--Note that this option applies to protocol version 2 only.
-+Note that this option applies to protocol version 2 connections using GSSAPI.
-+.It Cm GSSAPIRenewalForcesRekey
-+If set to 
-+.Dq yes
-+then renewal of the client's GSSAPI credentials will force the rekeying of the
-+ssh connection. With a compatible server, this can delegate the renewed 
-+credentials to a session on the server.
-+The default is
-+.Dq no .
-+.It Cm GSSAPITrustDns
-+Set to 
-+.Dq yes to indicate that the DNS is trusted to securely canonicalize
-+the name of the host being connected to. If 
-+.Dq no, the hostname entered on the
-+command line will be passed untouched to the GSSAPI library.
-+The default is
-+.Dq no .
-+This option only applies to protocol version 2 connections using GSSAPI.
- .It Cm HashKnownHosts
- Indicates that
- .Xr ssh 1
-diff -Nrup openssh-6.5p1/sshconnect2.c openssh-6.5p1.patched/sshconnect2.c
---- openssh-6.5p1/sshconnect2.c	2014-01-09 15:58:53.000000000 -0800
-+++ openssh-6.5p1.patched/sshconnect2.c	2014-02-15 16:54:12.000000000 -0800
-@@ -159,9 +159,34 @@ ssh_kex2(char *host, struct sockaddr *ho
- {
- 	Kex *kex;
- 
-+#ifdef GSSAPI
-+	char *orig = NULL, *gss = NULL;
-+	char *gss_host = NULL;
-+#endif
-+
- 	xxx_host = host;
- 	xxx_hostaddr = hostaddr;
- 
-+#ifdef GSSAPI
-+	if (options.gss_keyex) {
-+		/* Add the GSSAPI mechanisms currently supported on this 
-+		 * client to the key exchange algorithm proposal */
-+		orig = myproposal[PROPOSAL_KEX_ALGS];
-+
-+		if (options.gss_trust_dns)
-+			gss_host = (char *)get_canonical_hostname(1);
-+		else
-+			gss_host = host;
-+
-+		gss = ssh_gssapi_client_mechanisms(gss_host, options.gss_client_identity);
-+		if (gss) {
-+			debug("Offering GSSAPI proposal: %s", gss);
-+			xasprintf(&myproposal[PROPOSAL_KEX_ALGS],
-+			    "%s,%s", gss, orig);
-+		}
-+	}
-+#endif
-+
- 	if (options.ciphers == (char *)-1) {
- 		logit("No valid ciphers for protocol version 2 given, using defaults.");
- 		options.ciphers = NULL;
-@@ -197,6 +222,17 @@ ssh_kex2(char *host, struct sockaddr *ho
- 	if (options.kex_algorithms != NULL)
- 		myproposal[PROPOSAL_KEX_ALGS] = options.kex_algorithms;
- 
-+#ifdef GSSAPI
-+	/* If we've got GSSAPI algorithms, then we also support the
-+	 * 'null' hostkey, as a last resort */
-+	if (options.gss_keyex && gss) {
-+		orig = myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS];
-+		xasprintf(&myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS], 
-+		    "%s,null", orig);
-+		free(gss);
-+	}
-+#endif
-+
- 	if (options.rekey_limit || options.rekey_interval)
- 		packet_set_rekey_limits((u_int32_t)options.rekey_limit,
- 		    (time_t)options.rekey_interval);
-@@ -208,11 +244,31 @@ ssh_kex2(char *host, struct sockaddr *ho
- 	kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
- 	kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
- 	kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
-+#ifdef GSSAPI
-+	if (options.gss_keyex) {
-+		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_client;
-+		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_client;
-+		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_client;
-+	}
-+#endif
- 	kex->kex[KEX_C25519_SHA256] = kexc25519_client;
- 	kex->client_version_string=client_version_string;
- 	kex->server_version_string=server_version_string;
- 	kex->verify_host_key=&verify_host_key_callback;
- 
-+#ifdef GSSAPI
-+	if (options.gss_keyex) {
-+		kex->gss_deleg_creds = options.gss_deleg_creds;
-+		kex->gss_trust_dns = options.gss_trust_dns;
-+		kex->gss_client = options.gss_client_identity;
-+		if (options.gss_server_identity) {
-+			kex->gss_host = options.gss_server_identity;
-+		} else {
-+			kex->gss_host = gss_host;
-+		}
-+	}
-+#endif
-+
- 	xxx_kex = kex;
- 
- 	dispatch_run(DISPATCH_BLOCK, &kex->done, kex);
-@@ -302,6 +358,7 @@ void	input_gssapi_token(int type, u_int3
- void	input_gssapi_hash(int type, u_int32_t, void *);
- void	input_gssapi_error(int, u_int32_t, void *);
- void	input_gssapi_errtok(int, u_int32_t, void *);
-+int	userauth_gsskeyex(Authctxt *authctxt);
- #endif
- 
- void	userauth(Authctxt *, char *);
-@@ -317,6 +374,11 @@ static char *authmethods_get(void);
- 
- Authmethod authmethods[] = {
- #ifdef GSSAPI
-+	{"gssapi-keyex",
-+		userauth_gsskeyex,
-+		NULL,
-+		&options.gss_authentication,
-+		NULL},
- 	{"gssapi-with-mic",
- 		userauth_gssapi,
- 		NULL,
-@@ -613,19 +675,31 @@ userauth_gssapi(Authctxt *authctxt)
- 	static u_int mech = 0;
- 	OM_uint32 min;
- 	int ok = 0;
-+	const char *gss_host;
-+
-+	if (options.gss_server_identity)
-+		gss_host = options.gss_server_identity;
-+	else if (options.gss_trust_dns)
-+		gss_host = get_canonical_hostname(1);
-+	else
-+		gss_host = authctxt->host;
- 
- 	/* Try one GSSAPI method at a time, rather than sending them all at
- 	 * once. */
- 
- 	if (gss_supported == NULL)
--		gss_indicate_mechs(&min, &gss_supported);
-+		if (GSS_ERROR(gss_indicate_mechs(&min, &gss_supported))) {
-+			gss_supported = NULL;
-+			return 0;
-+		}
- 
- 	/* Check to see if the mechanism is usable before we offer it */
- 	while (mech < gss_supported->count && !ok) {
- 		/* My DER encoding requires length<128 */
- 		if (gss_supported->elements[mech].length < 128 &&
- 		    ssh_gssapi_check_mechanism(&gssctxt, 
--		    &gss_supported->elements[mech], authctxt->host)) {
-+		    &gss_supported->elements[mech], gss_host, 
-+                    options.gss_client_identity)) {
- 			ok = 1; /* Mechanism works */
- 		} else {
- 			mech++;
-@@ -722,8 +796,8 @@ input_gssapi_response(int type, u_int32_
- {
- 	Authctxt *authctxt = ctxt;
- 	Gssctxt *gssctxt;
--	int oidlen;
--	char *oidv;
-+	u_int oidlen;
-+	u_char *oidv;
- 
- 	if (authctxt == NULL)
- 		fatal("input_gssapi_response: no authentication context");
-@@ -832,6 +906,48 @@ input_gssapi_error(int type, u_int32_t p
- 	free(msg);
- 	free(lang);
- }
-+
-+int
-+userauth_gsskeyex(Authctxt *authctxt)
-+{
-+	Buffer b;
-+	gss_buffer_desc gssbuf;
-+	gss_buffer_desc mic = GSS_C_EMPTY_BUFFER;
-+	OM_uint32 ms;
-+
-+	static int attempt = 0;
-+	if (attempt++ >= 1)
-+		return (0);
-+
-+	if (gss_kex_context == NULL) {
-+		debug("No valid Key exchange context"); 
-+		return (0);
-+	}
-+
-+	ssh_gssapi_buildmic(&b, authctxt->server_user, authctxt->service,
-+	    "gssapi-keyex");
-+
-+	gssbuf.value = buffer_ptr(&b);
-+	gssbuf.length = buffer_len(&b);
-+
-+	if (GSS_ERROR(ssh_gssapi_sign(gss_kex_context, &gssbuf, &mic))) {
-+		buffer_free(&b);
-+		return (0);
-+	}
-+
-+	packet_start(SSH2_MSG_USERAUTH_REQUEST);
-+	packet_put_cstring(authctxt->server_user);
-+	packet_put_cstring(authctxt->service);
-+	packet_put_cstring(authctxt->method->name);
-+	packet_put_string(mic.value, mic.length);
-+	packet_send();
-+
-+	buffer_free(&b);
-+	gss_release_buffer(&ms, &mic);
-+
-+	return (1);
-+}
-+
- #endif /* GSSAPI */
- 
- int
-diff -Nrup openssh-6.5p1/sshd.c openssh-6.5p1.patched/sshd.c
---- openssh-6.5p1/sshd.c	2014-01-27 20:08:13.000000000 -0800
-+++ openssh-6.5p1.patched/sshd.c	2014-02-15 16:54:54.000000000 -0800
-@@ -122,6 +122,10 @@
- #include "ssh-sandbox.h"
- #include "version.h"
- 
-+#ifdef USE_SECURITY_SESSION_API
-+#include <Security/AuthSession.h>
-+#endif
-+
- #ifdef LIBWRAP
- #include <tcpd.h>
- #include <syslog.h>
-@@ -1735,10 +1739,13 @@ main(int ac, char **av)
- 		logit("Disabling protocol version 1. Could not load host key");
- 		options.protocol &= ~SSH_PROTO_1;
- 	}
-+#ifndef GSSAPI
-+	/* The GSSAPI key exchange can run without a host key */
- 	if ((options.protocol & SSH_PROTO_2) && !sensitive_data.have_ssh2_key) {
- 		logit("Disabling protocol version 2. Could not load host key");
- 		options.protocol &= ~SSH_PROTO_2;
- 	}
-+#endif
- 	if (!(options.protocol & (SSH_PROTO_1|SSH_PROTO_2))) {
- 		logit("sshd: no hostkeys available -- exiting.");
- 		exit(1);
-@@ -2065,6 +2072,60 @@ main(int ac, char **av)
- 	    remote_ip, remote_port,
- 	    get_local_ipaddr(sock_in), get_local_port());
- 
-+#ifdef USE_SECURITY_SESSION_API
-+	/*
-+	 * Create a new security session for use by the new user login if
-+	 * the current session is the root session or we are not launched
-+	 * by inetd (eg: debugging mode or server mode).  We do not
-+	 * necessarily need to create a session if we are launched from
-+	 * inetd because Panther xinetd will create a session for us.
-+	 *
-+	 * The only case where this logic will fail is if there is an
-+	 * inetd running in a non-root session which is not creating
-+	 * new sessions for us.  Then all the users will end up in the
-+	 * same session (bad).
-+	 *
-+	 * When the client exits, the session will be destroyed for us
-+	 * automatically.
-+	 *
-+	 * We must create the session before any credentials are stored
-+	 * (including AFS pags, which happens a few lines below).
-+	 */
-+	{
-+		OSStatus err = 0;
-+		SecuritySessionId sid = 0;
-+		SessionAttributeBits sattrs = 0;
-+
-+		err = SessionGetInfo(callerSecuritySession, &sid, &sattrs);
-+		if (err)
-+			error("SessionGetInfo() failed with error %.8X",
-+			    (unsigned) err);
-+		else
-+			debug("Current Session ID is %.8X / Session Attributes are %.8X",
-+			    (unsigned) sid, (unsigned) sattrs);
-+
-+		if (inetd_flag && !(sattrs & sessionIsRoot))
-+			debug("Running in inetd mode in a non-root session... "
-+			    "assuming inetd created the session for us.");
-+		else {
-+			debug("Creating new security session...");
-+			err = SessionCreate(0, sessionHasTTY | sessionIsRemote);
-+			if (err)
-+				error("SessionCreate() failed with error %.8X",
-+				    (unsigned) err);
-+
-+			err = SessionGetInfo(callerSecuritySession, &sid, 
-+			    &sattrs);
-+			if (err)
-+				error("SessionGetInfo() failed with error %.8X",
-+				    (unsigned) err);
-+			else
-+				debug("New Session ID is %.8X / Session Attributes are %.8X",
-+				    (unsigned) sid, (unsigned) sattrs);
-+		}
-+	}
-+#endif
-+
- 	/*
- 	 * We don't want to listen forever unless the other side
- 	 * successfully authenticates itself.  So we set up an alarm which is
-@@ -2476,6 +2537,48 @@ do_ssh2_kex(void)
- 	myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = compat_pkalg_proposal(
- 	    list_hostkey_types());
- 
-+#ifdef GSSAPI
-+	{
-+	char *orig;
-+	char *gss = NULL;
-+	char *newstr = NULL;
-+	orig = myproposal[PROPOSAL_KEX_ALGS];
-+
-+	/* 
-+	 * If we don't have a host key, then there's no point advertising
-+	 * the other key exchange algorithms
-+	 */
-+
-+	if (strlen(myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS]) == 0)
-+		orig = NULL;
-+
-+	if (options.gss_keyex)
-+		gss = ssh_gssapi_server_mechanisms();
-+	else
-+		gss = NULL;
-+
-+	if (gss && orig)
-+		xasprintf(&newstr, "%s,%s", gss, orig);
-+	else if (gss)
-+		newstr = gss;
-+	else if (orig)
-+		newstr = orig;
-+
-+	/* 
-+	 * If we've got GSSAPI mechanisms, then we've got the 'null' host
-+	 * key alg, but we can't tell people about it unless its the only
-+  	 * host key algorithm we support
-+	 */
-+	if (gss && (strlen(myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS])) == 0)
-+		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = "null";
-+
-+	if (newstr)
-+		myproposal[PROPOSAL_KEX_ALGS] = newstr;
-+	else
-+		fatal("No supported key exchange algorithms");
-+	}
-+#endif
-+
- 	/* start key exchange */
- 	kex = kex_setup(myproposal);
- 	kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server;
-@@ -2484,6 +2587,13 @@ do_ssh2_kex(void)
- 	kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
- 	kex->kex[KEX_ECDH_SHA2] = kexecdh_server;
- 	kex->kex[KEX_C25519_SHA256] = kexc25519_server;
-+#ifdef GSSAPI
-+	if (options.gss_keyex) {
-+		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
-+		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_server;
-+		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_server;
-+	}
-+#endif
- 	kex->server = 1;
- 	kex->client_version_string=client_version_string;
- 	kex->server_version_string=server_version_string;
-diff -Nrup openssh-6.5p1/sshd_config openssh-6.5p1.patched/sshd_config
---- openssh-6.5p1/sshd_config	2014-01-12 00:20:47.000000000 -0800
-+++ openssh-6.5p1.patched/sshd_config	2014-02-15 16:50:46.000000000 -0800
-@@ -85,6 +85,8 @@ AuthorizedKeysFile	.ssh/authorized_keys
- # GSSAPI options
- #GSSAPIAuthentication no
- #GSSAPICleanupCredentials yes
-+#GSSAPIStrictAcceptorCheck yes
-+#GSSAPIKeyExchange no
- 
- # Set this to 'yes' to enable PAM authentication, account processing,
- # and session processing. If this is enabled, PAM authentication will
-diff -Nrup openssh-6.5p1/sshd_config.5 openssh-6.5p1.patched/sshd_config.5
---- openssh-6.5p1/sshd_config.5	2013-12-17 22:47:03.000000000 -0800
-+++ openssh-6.5p1.patched/sshd_config.5	2014-02-15 16:50:46.000000000 -0800
-@@ -493,12 +493,40 @@ Specifies whether user authentication ba
- The default is
- .Dq no .
- Note that this option applies to protocol version 2 only.
-+.It Cm GSSAPIKeyExchange
-+Specifies whether key exchange based on GSSAPI is allowed. GSSAPI key exchange
-+doesn't rely on ssh keys to verify host identity.
-+The default is
-+.Dq no .
-+Note that this option applies to protocol version 2 only.
- .It Cm GSSAPICleanupCredentials
- Specifies whether to automatically destroy the user's credentials cache
- on logout.
- The default is
- .Dq yes .
- Note that this option applies to protocol version 2 only.
-+.It Cm GSSAPIStrictAcceptorCheck
-+Determines whether to be strict about the identity of the GSSAPI acceptor 
-+a client authenticates against. If
-+.Dq yes
-+then the client must authenticate against the
-+.Pa host
-+service on the current hostname. If 
-+.Dq no
-+then the client may authenticate against any service key stored in the 
-+machine's default store. This facility is provided to assist with operation 
-+on multi homed machines. 
-+The default is
-+.Dq yes .
-+Note that this option applies only to protocol version 2 GSSAPI connections,
-+and setting it to 
-+.Dq no
-+may only work with recent Kerberos GSSAPI libraries.
-+.It Cm GSSAPIStoreCredentialsOnRekey
-+Controls whether the user's GSSAPI credentials should be updated following a 
-+successful connection rekeying. This option can be used to accepted renewed 
-+or updated credentials from a compatible client. The default is
-+.Dq no .
- .It Cm HostbasedAuthentication
- Specifies whether rhosts or /etc/hosts.equiv authentication together
- with successful public key client host authentication is allowed

Copied: trunk/dports/net/openssh/files/openssh-6.7p1-gsskex-all-20140907.patch (from rev 129548, trunk/dports/net/openssh/files/openssh-6.3p1-gsskex-all-20130920.patch)
===================================================================
--- trunk/dports/net/openssh/files/openssh-6.7p1-gsskex-all-20140907.patch	                        (rev 0)
+++ trunk/dports/net/openssh/files/openssh-6.7p1-gsskex-all-20140907.patch	2014-12-15 15:16:10 UTC (rev 129549)
@@ -0,0 +1,2899 @@
+--- a/ChangeLog.gssapi.old
++++ b/ChangeLog.gssapi
+@@ -0,0 +1,113 @@
++20110101
++  - Finally update for OpenSSH 5.6p1
++  - Add GSSAPIServerIdentity option from Jim Basney
++
++20100308
++  - [ Makefile.in, key.c, key.h ]
++    Updates for OpenSSH 5.4p1
++  - [ servconf.c ]
++    Include GSSAPI options in the sshd -T configuration dump, and flag
++    some older configuration options as being unsupported. Thanks to Colin
++    Watson.
++  -
++
++20100124
++  - [ sshconnect2.c ]
++    Adapt to deal with additional element in Authmethod structure. Thanks to
++    Colin Watson
++
++20090615
++  - [ gss-genr.c gss-serv.c kexgssc.c kexgsss.c monitor.c sshconnect2.c
++      sshd.c ]
++    Fix issues identified by Greg Hudson following a code review
++	Check return value of gss_indicate_mechs
++	Protect GSSAPI calls in monitor, so they can only be used if enabled
++	Check return values of bignum functions in key exchange
++	Use BN_clear_free to clear other side's DH value
++	Make ssh_gssapi_id_kex more robust
++	Only configure kex table pointers if GSSAPI is enabled
++	Don't leak mechanism list, or gss mechanism list
++	Cast data.length before printing
++	If serverkey isn't provided, use an empty string, rather than NULL
++
++20090201
++  - [ gss-genr.c gss-serv.c kex.h kexgssc.c readconf.c readconf.h ssh-gss.h
++      ssh_config.5 sshconnet2.c ]
++    Add support for the GSSAPIClientIdentity option, which allows the user
++    to specify which GSSAPI identity to use to contact a given server
++
++20080404
++  - [ gss-serv.c ]
++    Add code to actually implement GSSAPIStrictAcceptCheck, which had somehow
++    been omitted from a previous version of this patch. Reported by Borislav
++    Stoichkov
++
++20070317
++  - [ gss-serv-krb5.c ]
++    Remove C99ism, where new_ccname was being declared in the middle of a
++    function
++
++20061220
++  - [ servconf.c ]
++    Make default for GSSAPIStrictAcceptorCheck be Yes, to match previous, and
++    documented, behaviour. Reported by Dan Watson.
++
++20060910
++  - [ gss-genr.c kexgssc.c kexgsss.c kex.h monitor.c sshconnect2.c sshd.c
++      ssh-gss.h ]
++    add support for gss-group14-sha1 key exchange mechanisms
++  - [ gss-serv.c servconf.c servconf.h sshd_config sshd_config.5 ]
++    Add GSSAPIStrictAcceptorCheck option to allow the disabling of
++    acceptor principal checking on multi-homed machines.
++    <Bugzilla #928>
++  - [ sshd_config ssh_config ]
++    Add settings for GSSAPIKeyExchange and GSSAPITrustDNS to the sample
++    configuration files
++  - [ kexgss.c kegsss.c sshconnect2.c sshd.c ]
++    Code cleanup. Replace strlen/xmalloc/snprintf sequences with xasprintf()
++    Limit length of error messages displayed by client
++
++20060909
++  - [ gss-genr.c gss-serv.c ]
++    move ssh_gssapi_acquire_cred() and ssh_gssapi_server_ctx to be server
++    only, where they belong
++    <Bugzilla #1225>
++
++20060829
++  - [ gss-serv-krb5.c ]
++    Fix CCAPI credentials cache name when creating KRB5CCNAME environment 
++    variable
++
++20060828
++  - [ gss-genr.c ]
++    Avoid Heimdal context freeing problem
++    <Fixed upstream 20060829>
++
++20060818
++  - [ gss-genr.c ssh-gss.h sshconnect2.c ]
++    Make sure that SPENGO is disabled 
++    <Bugzilla #1218 - Fixed upstream 20060818>
++
++20060421
++  - [ gssgenr.c, sshconnect2.c ]
++    a few type changes (signed versus unsigned, int versus size_t) to
++    fix compiler errors/warnings 
++    (from jbasney AT ncsa.uiuc.edu)
++  - [ kexgssc.c, sshconnect2.c ]
++    fix uninitialized variable warnings
++    (from jbasney AT ncsa.uiuc.edu)
++  - [ gssgenr.c ]
++    pass oid to gss_display_status (helpful when using GSSAPI mechglue)
++    (from jbasney AT ncsa.uiuc.edu)
++    <Bugzilla #1220 >
++  - [ gss-serv-krb5.c ]
++    #ifdef HAVE_GSSAPI_KRB5 should be #ifdef HAVE_GSSAPI_KRB5_H
++    (from jbasney AT ncsa.uiuc.edu)
++    <Fixed upstream 20060304>
++  - [ readconf.c, readconf.h, ssh_config.5, sshconnect2.c 
++    add client-side GssapiKeyExchange option
++    (from jbasney AT ncsa.uiuc.edu)
++  - [ sshconnect2.c ]
++    add support for GssapiTrustDns option for gssapi-with-mic
++    (from jbasney AT ncsa.uiuc.edu)
++    <gssapi-with-mic support is Bugzilla #1008>
+--- a/Makefile.in.old
++++ b/Makefile.in
+@@ -83,6 +83,7 @@
+ 	atomicio.o key.o dispatch.o kex.o mac.o uidswap.o uuencode.o misc.o \
+ 	monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-rsa.o dh.o \
+ 	kexdh.o kexgex.o kexdhc.o kexgexc.o bufec.o kexecdh.o kexecdhc.o \
++	kexgssc.o \
+ 	msg.o progressmeter.o dns.o entropy.o gss-genr.o umac.o umac128.o \
+ 	ssh-pkcs11.o krl.o smult_curve25519_ref.o \
+ 	kexc25519.o kexc25519c.o poly1305.o chacha.o cipher-chachapoly.o \
+@@ -102,7 +103,7 @@
+ 	auth2-none.o auth2-passwd.o auth2-pubkey.o \
+ 	monitor_mm.o monitor.o monitor_wrap.o kexdhs.o kexgexs.o kexecdhs.o \
+ 	kexc25519s.o auth-krb5.o \
+-	auth2-gss.o gss-serv.o gss-serv-krb5.o \
++	auth2-gss.o gss-serv.o gss-serv-krb5.o kexgsss.o\
+ 	loginrec.o auth-pam.o auth-shadow.o auth-sia.o md5crypt.o \
+ 	sftp-server.o sftp-common.o \
+ 	roaming_common.o roaming_serv.o \
+--- a/auth-krb5.c.old
++++ b/auth-krb5.c
+@@ -183,8 +183,13 @@
+ 
+ 	len = strlen(authctxt->krb5_ticket_file) + 6;
+ 	authctxt->krb5_ccname = xmalloc(len);
++#ifdef USE_CCAPI
++	snprintf(authctxt->krb5_ccname, len, "API:%s",
++	    authctxt->krb5_ticket_file);
++#else
+ 	snprintf(authctxt->krb5_ccname, len, "FILE:%s",
+ 	    authctxt->krb5_ticket_file);
++#endif
+ 
+ #ifdef USE_PAM
+ 	if (options.use_pam)
+@@ -241,15 +246,22 @@
+ #ifndef HEIMDAL
+ krb5_error_code
+ ssh_krb5_cc_gen(krb5_context ctx, krb5_ccache *ccache) {
+-	int tmpfd, ret, oerrno;
++	int ret;
+ 	char ccname[40];
+ 	mode_t old_umask;
++#ifdef USE_CCAPI
++	char cctemplate[] = "API:krb5cc_%d";
++#else
++	char cctemplate[] = "FILE:/tmp/krb5cc_%d_XXXXXXXXXX";
++	int tmpfd, oerrno;
++#endif
+ 
+ 	ret = snprintf(ccname, sizeof(ccname),
+-	    "FILE:/tmp/krb5cc_%d_XXXXXXXXXX", geteuid());
++	    cctemplate, geteuid());
+ 	if (ret < 0 || (size_t)ret >= sizeof(ccname))
+ 		return ENOMEM;
+ 
++#ifndef USE_CCAPI
+ 	old_umask = umask(0177);
+ 	tmpfd = mkstemp(ccname + strlen("FILE:"));
+ 	oerrno = errno;
+@@ -266,6 +278,7 @@
+ 		return oerrno;
+ 	}
+ 	close(tmpfd);
++#endif
+ 
+ 	return (krb5_cc_resolve(ctx, ccname, ccache));
+ }
+--- a/auth2-gss.c.old
++++ b/auth2-gss.c
+@@ -1,7 +1,7 @@
+ /* $OpenBSD: auth2-gss.c,v 1.21 2014/02/26 20:28:44 djm Exp $ */
+ 
+ /*
+- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
++ * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
+  *
+  * Redistribution and use in source and binary forms, with or without
+  * modification, are permitted provided that the following conditions
+@@ -53,6 +53,40 @@
+ static void input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt);
+ static void input_gssapi_errtok(int, u_int32_t, void *);
+ 
++/* 
++ * The 'gssapi_keyex' userauth mechanism.
++ */
++static int
++userauth_gsskeyex(Authctxt *authctxt)
++{
++	int authenticated = 0;
++	Buffer b;
++	gss_buffer_desc mic, gssbuf;
++	u_int len;
++
++	mic.value = packet_get_string(&len);
++	mic.length = len;
++
++	packet_check_eom();
++
++	ssh_gssapi_buildmic(&b, authctxt->user, authctxt->service,
++	    "gssapi-keyex");
++
++	gssbuf.value = buffer_ptr(&b);
++	gssbuf.length = buffer_len(&b);
++
++	/* gss_kex_context is NULL with privsep, so we can't check it here */
++	if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gss_kex_context, 
++	    &gssbuf, &mic))))
++		authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user,
++		    authctxt->pw));
++	
++	buffer_free(&b);
++	free(mic.value);
++
++	return (authenticated);
++}
++
+ /*
+  * We only support those mechanisms that we know about (ie ones that we know
+  * how to check local user kuserok and the like)
+@@ -236,7 +270,8 @@
+ 
+ 	packet_check_eom();
+ 
+-	authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
++	authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user,
++	    authctxt->pw));
+ 
+ 	authctxt->postponed = 0;
+ 	dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL);
+@@ -271,7 +306,8 @@
+ 	gssbuf.length = buffer_len(&b);
+ 
+ 	if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gssctxt, &gssbuf, &mic))))
+-		authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
++		authenticated = 
++		    PRIVSEP(ssh_gssapi_userok(authctxt->user, authctxt->pw));
+ 	else
+ 		logit("GSSAPI MIC check failed");
+ 
+@@ -286,6 +322,12 @@
+ 	userauth_finish(authctxt, authenticated, "gssapi-with-mic", NULL);
+ }
+ 
++Authmethod method_gsskeyex = {
++	"gssapi-keyex",
++	userauth_gsskeyex,
++	&options.gss_authentication
++};
++
+ Authmethod method_gssapi = {
+ 	"gssapi-with-mic",
+ 	userauth_gssapi,
+--- a/auth2.c.old
++++ b/auth2.c
+@@ -70,6 +70,7 @@
+ extern Authmethod method_kbdint;
+ extern Authmethod method_hostbased;
+ #ifdef GSSAPI
++extern Authmethod method_gsskeyex;
+ extern Authmethod method_gssapi;
+ #endif
+ 
+@@ -77,6 +78,7 @@
+ 	&method_none,
+ 	&method_pubkey,
+ #ifdef GSSAPI
++	&method_gsskeyex,
+ 	&method_gssapi,
+ #endif
+ 	&method_passwd,
+--- a/clientloop.c.old
++++ b/clientloop.c
+@@ -111,6 +111,10 @@
+ #include "msg.h"
+ #include "roaming.h"
+ 
++#ifdef GSSAPI
++#include "ssh-gss.h"
++#endif
++
+ /* import options */
+ extern Options options;
+ 
+@@ -1630,6 +1634,15 @@
+ 		/* Do channel operations unless rekeying in progress. */
+ 		if (!rekeying) {
+ 			channel_after_select(readset, writeset);
++
++#ifdef GSSAPI
++			if (options.gss_renewal_rekey &&
++			    ssh_gssapi_credentials_updated(GSS_C_NO_CONTEXT)) {
++				debug("credentials updated - forcing rekey");
++				need_rekeying = 1;
++			}
++#endif
++
+ 			if (need_rekeying || packet_need_rekeying()) {
+ 				debug("need rekeying");
+ 				xxx_kex->done = 0;
+--- a/configure.ac.old
++++ b/configure.ac
+@@ -584,6 +584,30 @@
+ 	    [Use tunnel device compatibility to OpenBSD])
+ 	AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
+ 	    [Prepend the address family to IP tunnel traffic])
++	AC_MSG_CHECKING(if we have the Security Authorization Session API)
++	AC_TRY_COMPILE([#include <Security/AuthSession.h>],
++		[SessionCreate(0, 0);],
++		[ac_cv_use_security_session_api="yes"
++		 AC_DEFINE(USE_SECURITY_SESSION_API, 1, 
++			[platform has the Security Authorization Session API])
++		 LIBS="$LIBS -framework Security"
++		 AC_MSG_RESULT(yes)],
++		[ac_cv_use_security_session_api="no"
++		 AC_MSG_RESULT(no)])
++	AC_MSG_CHECKING(if we have an in-memory credentials cache)
++	AC_TRY_COMPILE(
++		[#include <Kerberos/Kerberos.h>],
++		[cc_context_t c;
++		 (void) cc_initialize (&c, 0, NULL, NULL);],
++		[AC_DEFINE(USE_CCAPI, 1, 
++			[platform uses an in-memory credentials cache])
++		 LIBS="$LIBS -framework Security"
++		 AC_MSG_RESULT(yes)
++		 if test "x$ac_cv_use_security_session_api" = "xno"; then
++			AC_MSG_ERROR(*** Need a security framework to use the credentials cache API ***)
++		fi],
++		[AC_MSG_RESULT(no)]
++	)
+ 	m4_pattern_allow([AU_IPv])
+ 	AC_CHECK_DECL([AU_IPv4], [], 
+ 	    AC_DEFINE([AU_IPv4], [0], [System only supports IPv4 audit records])
+--- a/gss-genr.c.old
++++ b/gss-genr.c
+@@ -1,7 +1,7 @@
+ /* $OpenBSD: gss-genr.c,v 1.22 2013/11/08 00:39:15 djm Exp $ */
+ 
+ /*
+- * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
++ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
+  *
+  * Redistribution and use in source and binary forms, with or without
+  * modification, are permitted provided that the following conditions
+@@ -39,12 +39,167 @@
+ #include "buffer.h"
+ #include "log.h"
+ #include "ssh2.h"
++#include "cipher.h"
++#include "key.h"
++#include "kex.h"
++#include <openssl/evp.h>
+ 
+ #include "ssh-gss.h"
+ 
+ extern u_char *session_id2;
+ extern u_int session_id2_len;
+ 
++typedef struct {
++	char *encoded;
++	gss_OID oid;
++} ssh_gss_kex_mapping;
++
++/*
++ * XXX - It would be nice to find a more elegant way of handling the
++ * XXX   passing of the key exchange context to the userauth routines
++ */
++
++Gssctxt *gss_kex_context = NULL;
++
++static ssh_gss_kex_mapping *gss_enc2oid = NULL;
++
++int 
++ssh_gssapi_oid_table_ok() {
++	return (gss_enc2oid != NULL);
++}
++
++/*
++ * Return a list of the gss-group1-sha1 mechanisms supported by this program
++ *
++ * We test mechanisms to ensure that we can use them, to avoid starting
++ * a key exchange with a bad mechanism
++ */
++
++char *
++ssh_gssapi_client_mechanisms(const char *host, const char *client) {
++	gss_OID_set gss_supported;
++	OM_uint32 min_status;
++
++	if (GSS_ERROR(gss_indicate_mechs(&min_status, &gss_supported)))
++		return NULL;
++
++	return(ssh_gssapi_kex_mechs(gss_supported, ssh_gssapi_check_mechanism,
++	    host, client));
++}
++
++char *
++ssh_gssapi_kex_mechs(gss_OID_set gss_supported, ssh_gssapi_check_fn *check,
++    const char *host, const char *client) {
++	Buffer buf;
++	size_t i;
++	int oidpos, enclen;
++	char *mechs, *encoded;
++	u_char digest[EVP_MAX_MD_SIZE];
++	char deroid[2];
++	const EVP_MD *evp_md = EVP_md5();
++	EVP_MD_CTX md;
++
++	if (gss_enc2oid != NULL) {
++		for (i = 0; gss_enc2oid[i].encoded != NULL; i++)
++			free(gss_enc2oid[i].encoded);
++		free(gss_enc2oid);
++	}
++
++	gss_enc2oid = xmalloc(sizeof(ssh_gss_kex_mapping) *
++	    (gss_supported->count + 1));
++
++	buffer_init(&buf);
++
++	oidpos = 0;
++	for (i = 0; i < gss_supported->count; i++) {
++		if (gss_supported->elements[i].length < 128 &&
++		    (*check)(NULL, &(gss_supported->elements[i]), host, client)) {
++
++			deroid[0] = SSH_GSS_OIDTYPE;
++			deroid[1] = gss_supported->elements[i].length;
++
++			EVP_DigestInit(&md, evp_md);
++			EVP_DigestUpdate(&md, deroid, 2);
++			EVP_DigestUpdate(&md,
++			    gss_supported->elements[i].elements,
++			    gss_supported->elements[i].length);
++			EVP_DigestFinal(&md, digest, NULL);
++
++			encoded = xmalloc(EVP_MD_size(evp_md) * 2);
++			enclen = __b64_ntop(digest, EVP_MD_size(evp_md),
++			    encoded, EVP_MD_size(evp_md) * 2);
++
++			if (oidpos != 0)
++				buffer_put_char(&buf, ',');
++
++			buffer_append(&buf, KEX_GSS_GEX_SHA1_ID,
++			    sizeof(KEX_GSS_GEX_SHA1_ID) - 1);
++			buffer_append(&buf, encoded, enclen);
++			buffer_put_char(&buf, ',');
++			buffer_append(&buf, KEX_GSS_GRP1_SHA1_ID, 
++			    sizeof(KEX_GSS_GRP1_SHA1_ID) - 1);
++			buffer_append(&buf, encoded, enclen);
++			buffer_put_char(&buf, ',');
++			buffer_append(&buf, KEX_GSS_GRP14_SHA1_ID,
++			    sizeof(KEX_GSS_GRP14_SHA1_ID) - 1);
++			buffer_append(&buf, encoded, enclen);
++
++			gss_enc2oid[oidpos].oid = &(gss_supported->elements[i]);
++			gss_enc2oid[oidpos].encoded = encoded;
++			oidpos++;
++		}
++	}
++	gss_enc2oid[oidpos].oid = NULL;
++	gss_enc2oid[oidpos].encoded = NULL;
++
++	buffer_put_char(&buf, '\0');
++
++	mechs = xmalloc(buffer_len(&buf));
++	buffer_get(&buf, mechs, buffer_len(&buf));
++	buffer_free(&buf);
++
++	if (strlen(mechs) == 0) {
++		free(mechs);
++		mechs = NULL;
++	}
++	
++	return (mechs);
++}
++
++gss_OID
++ssh_gssapi_id_kex(Gssctxt *ctx, char *name, int kex_type) {
++	int i = 0;
++	
++	switch (kex_type) {
++	case KEX_GSS_GRP1_SHA1:
++		if (strlen(name) < sizeof(KEX_GSS_GRP1_SHA1_ID))
++			return GSS_C_NO_OID;
++		name += sizeof(KEX_GSS_GRP1_SHA1_ID) - 1;
++		break;
++	case KEX_GSS_GRP14_SHA1:
++		if (strlen(name) < sizeof(KEX_GSS_GRP14_SHA1_ID))
++			return GSS_C_NO_OID;
++		name += sizeof(KEX_GSS_GRP14_SHA1_ID) - 1;
++		break;
++	case KEX_GSS_GEX_SHA1:
++		if (strlen(name) < sizeof(KEX_GSS_GEX_SHA1_ID))
++			return GSS_C_NO_OID;
++		name += sizeof(KEX_GSS_GEX_SHA1_ID) - 1;
++		break;
++	default:
++		return GSS_C_NO_OID;
++	}
++
++	while (gss_enc2oid[i].encoded != NULL &&
++	    strcmp(name, gss_enc2oid[i].encoded) != 0)
++		i++;
++
++	if (gss_enc2oid[i].oid != NULL && ctx != NULL)
++		ssh_gssapi_set_oid(ctx, gss_enc2oid[i].oid);
++
++	return gss_enc2oid[i].oid;
++}
++
+ /* Check that the OID in a data stream matches that in the context */
+ int
+ ssh_gssapi_check_oid(Gssctxt *ctx, void *data, size_t len)
+@@ -197,7 +352,7 @@
+ 	}
+ 
+ 	ctx->major = gss_init_sec_context(&ctx->minor,
+-	    GSS_C_NO_CREDENTIAL, &ctx->context, ctx->name, ctx->oid,
++	    ctx->client_creds, &ctx->context, ctx->name, ctx->oid,
+ 	    GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | deleg_flag,
+ 	    0, NULL, recv_tok, NULL, send_tok, flags, NULL);
+ 
+@@ -227,8 +382,42 @@
+ }
+ 
+ OM_uint32
++ssh_gssapi_client_identity(Gssctxt *ctx, const char *name)
++{
++	gss_buffer_desc gssbuf;
++	gss_name_t gssname;
++	OM_uint32 status;
++	gss_OID_set oidset;
++
++	gssbuf.value = (void *) name;
++	gssbuf.length = strlen(gssbuf.value);
++
++	gss_create_empty_oid_set(&status, &oidset);
++	gss_add_oid_set_member(&status, ctx->oid, &oidset);
++
++	ctx->major = gss_import_name(&ctx->minor, &gssbuf,
++	    GSS_C_NT_USER_NAME, &gssname);
++
++	if (!ctx->major)
++		ctx->major = gss_acquire_cred(&ctx->minor, 
++		    gssname, 0, oidset, GSS_C_INITIATE, 
++		    &ctx->client_creds, NULL, NULL);
++
++	gss_release_name(&status, &gssname);
++	gss_release_oid_set(&status, &oidset);
++
++	if (ctx->major)
++		ssh_gssapi_error(ctx);
++
++	return(ctx->major);
++}
++
++OM_uint32
+ ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_t buffer, gss_buffer_t hash)
+ {
++	if (ctx == NULL) 
++		return -1;
++
+ 	if ((ctx->major = gss_get_mic(&ctx->minor, ctx->context,
+ 	    GSS_C_QOP_DEFAULT, buffer, hash)))
+ 		ssh_gssapi_error(ctx);
+@@ -236,6 +425,19 @@
+ 	return (ctx->major);
+ }
+ 
++/* Priviledged when used by server */
++OM_uint32
++ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
++{
++	if (ctx == NULL)
++		return -1;
++
++	ctx->major = gss_verify_mic(&ctx->minor, ctx->context,
++	    gssbuf, gssmic, NULL);
++
++	return (ctx->major);
++}
++
+ void
+ ssh_gssapi_buildmic(Buffer *b, const char *user, const char *service,
+     const char *context)
+@@ -249,11 +451,16 @@
+ }
+ 
+ int
+-ssh_gssapi_check_mechanism(Gssctxt **ctx, gss_OID oid, const char *host)
++ssh_gssapi_check_mechanism(Gssctxt **ctx, gss_OID oid, const char *host, 
++    const char *client)
+ {
+ 	gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
+ 	OM_uint32 major, minor;
+ 	gss_OID_desc spnego_oid = {6, (void *)"\x2B\x06\x01\x05\x05\x02"};
++	Gssctxt *intctx = NULL;
++
++	if (ctx == NULL)
++		ctx = &intctx;
+ 
+ 	/* RFC 4462 says we MUST NOT do SPNEGO */
+ 	if (oid->length == spnego_oid.length && 
+@@ -263,6 +470,10 @@
+ 	ssh_gssapi_build_ctx(ctx);
+ 	ssh_gssapi_set_oid(*ctx, oid);
+ 	major = ssh_gssapi_import_name(*ctx, host);
++
++	if (!GSS_ERROR(major) && client)
++		major = ssh_gssapi_client_identity(*ctx, client);
++
+ 	if (!GSS_ERROR(major)) {
+ 		major = ssh_gssapi_init_ctx(*ctx, 0, GSS_C_NO_BUFFER, &token, 
+ 		    NULL);
+@@ -272,10 +483,67 @@
+ 			    GSS_C_NO_BUFFER);
+ 	}
+ 
+-	if (GSS_ERROR(major)) 
++	if (GSS_ERROR(major) || intctx != NULL) 
+ 		ssh_gssapi_delete_ctx(ctx);
+ 
+ 	return (!GSS_ERROR(major));
+ }
+ 
++int
++ssh_gssapi_credentials_updated(Gssctxt *ctxt) {
++	static gss_name_t saved_name = GSS_C_NO_NAME;
++	static OM_uint32 saved_lifetime = 0;
++	static gss_OID saved_mech = GSS_C_NO_OID;
++	static gss_name_t name;
++	static OM_uint32 last_call = 0;
++	OM_uint32 lifetime, now, major, minor;
++	int equal;
++	gss_cred_usage_t usage = GSS_C_INITIATE;
++	
++	now = time(NULL);
++
++	if (ctxt) {
++		debug("Rekey has happened - updating saved versions");
++
++		if (saved_name != GSS_C_NO_NAME)
++			gss_release_name(&minor, &saved_name);
++
++		major = gss_inquire_cred(&minor, GSS_C_NO_CREDENTIAL,
++		    &saved_name, &saved_lifetime, NULL, NULL);
++
++		if (!GSS_ERROR(major)) {
++			saved_mech = ctxt->oid;
++		        saved_lifetime+= now;
++		} else {
++			/* Handle the error */
++		}
++		return 0;
++	}
++
++	if (now - last_call < 10)
++		return 0;
++
++	last_call = now;
++
++	if (saved_mech == GSS_C_NO_OID)
++		return 0;
++	
++	major = gss_inquire_cred(&minor, GSS_C_NO_CREDENTIAL, 
++	    &name, &lifetime, NULL, NULL);
++	if (major == GSS_S_CREDENTIALS_EXPIRED)
++		return 0;
++	else if (GSS_ERROR(major))
++		return 0;
++
++	major = gss_compare_name(&minor, saved_name, name, &equal);
++	gss_release_name(&minor, &name);
++	if (GSS_ERROR(major))
++		return 0;
++
++	if (equal && (saved_lifetime < lifetime + now - 10))
++		return 1;
++
++	return 0;
++}
++
+ #endif /* GSSAPI */
+--- a/gss-serv-krb5.c.old
++++ b/gss-serv-krb5.c
+@@ -1,7 +1,7 @@
+ /* $OpenBSD: gss-serv-krb5.c,v 1.8 2013/07/20 01:55:13 djm Exp $ */
+ 
+ /*
+- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
++ * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
+  *
+  * Redistribution and use in source and binary forms, with or without
+  * modification, are permitted provided that the following conditions
+@@ -123,6 +123,7 @@
+ 	OM_uint32 maj_status, min_status;
+ 	int len;
+ 	const char *errmsg;
++	const char *new_ccname;
+ 
+ 	if (client->creds == NULL) {
+ 		debug("No credentials stored");
+@@ -181,11 +182,16 @@
+ 		return;
+ 	}
+ 
+-	client->store.filename = xstrdup(krb5_cc_get_name(krb_context, ccache));
++	new_ccname = krb5_cc_get_name(krb_context, ccache);
++
+ 	client->store.envvar = "KRB5CCNAME";
+-	len = strlen(client->store.filename) + 6;
+-	client->store.envval = xmalloc(len);
+-	snprintf(client->store.envval, len, "FILE:%s", client->store.filename);
++#ifdef USE_CCAPI
++	xasprintf(&client->store.envval, "API:%s", new_ccname);
++	client->store.filename = NULL;
++#else
++	xasprintf(&client->store.envval, "FILE:%s", new_ccname);
++	client->store.filename = xstrdup(new_ccname);
++#endif
+ 
+ #ifdef USE_PAM
+ 	if (options.use_pam)
+@@ -197,6 +203,71 @@
+ 	return;
+ }
+ 
++int
++ssh_gssapi_krb5_updatecreds(ssh_gssapi_ccache *store, 
++    ssh_gssapi_client *client)
++{
++	krb5_ccache ccache = NULL;
++	krb5_principal principal = NULL;
++	char *name = NULL;
++	krb5_error_code problem;
++	OM_uint32 maj_status, min_status;
++
++   	if ((problem = krb5_cc_resolve(krb_context, store->envval, &ccache))) {
++                logit("krb5_cc_resolve(): %.100s",
++                    krb5_get_err_text(krb_context, problem));
++                return 0;
++       	}
++	
++	/* Find out who the principal in this cache is */
++	if ((problem = krb5_cc_get_principal(krb_context, ccache, 
++	    &principal))) {
++		logit("krb5_cc_get_principal(): %.100s",
++		    krb5_get_err_text(krb_context, problem));
++		krb5_cc_close(krb_context, ccache);
++		return 0;
++	}
++
++	if ((problem = krb5_unparse_name(krb_context, principal, &name))) {
++		logit("krb5_unparse_name(): %.100s",
++		    krb5_get_err_text(krb_context, problem));
++		krb5_free_principal(krb_context, principal);
++		krb5_cc_close(krb_context, ccache);
++		return 0;
++	}
++
++
++	if (strcmp(name,client->exportedname.value)!=0) {
++		debug("Name in local credentials cache differs. Not storing");
++		krb5_free_principal(krb_context, principal);
++		krb5_cc_close(krb_context, ccache);
++		krb5_free_unparsed_name(krb_context, name);
++		return 0;
++	}
++	krb5_free_unparsed_name(krb_context, name);
++
++	/* Name matches, so lets get on with it! */
++
++	if ((problem = krb5_cc_initialize(krb_context, ccache, principal))) {
++		logit("krb5_cc_initialize(): %.100s",
++		    krb5_get_err_text(krb_context, problem));
++		krb5_free_principal(krb_context, principal);
++		krb5_cc_close(krb_context, ccache);
++		return 0;
++	}
++
++	krb5_free_principal(krb_context, principal);
++
++	if ((maj_status = gss_krb5_copy_ccache(&min_status, client->creds,
++	    ccache))) {
++		logit("gss_krb5_copy_ccache() failed. Sorry!");
++		krb5_cc_close(krb_context, ccache);
++		return 0;
++	}
++
++	return 1;
++}
++
+ ssh_gssapi_mech gssapi_kerberos_mech = {
+ 	"toWM5Slw5Ew8Mqkay+al2g==",
+ 	"Kerberos",
+@@ -204,7 +275,8 @@
+ 	NULL,
+ 	&ssh_gssapi_krb5_userok,
+ 	NULL,
+-	&ssh_gssapi_krb5_storecreds
++	&ssh_gssapi_krb5_storecreds,
++	&ssh_gssapi_krb5_updatecreds
+ };
+ 
+ #endif /* KRB5 */
+--- a/gss-serv.c.old
++++ b/gss-serv.c
+@@ -1,7 +1,7 @@
+ /* $OpenBSD: gss-serv.c,v 1.27 2014/07/03 03:34:09 djm Exp $ */
+ 
+ /*
+- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
++ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
+  *
+  * Redistribution and use in source and binary forms, with or without
+  * modification, are permitted provided that the following conditions
+@@ -45,15 +45,20 @@
+ #include "channels.h"
+ #include "session.h"
+ #include "misc.h"
++#include "servconf.h"
++#include "uidswap.h"
+ 
+ #include "ssh-gss.h"
++#include "monitor_wrap.h"
++
++extern ServerOptions options;
+ 
+ static ssh_gssapi_client gssapi_client =
+     { GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER,
+-    GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL, NULL}};
++    GSS_C_NO_CREDENTIAL, GSS_C_NO_NAME,  NULL, {NULL, NULL, NULL, NULL}, 0, 0};
+ 
+ ssh_gssapi_mech gssapi_null_mech =
+-    { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL};
++    { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL, NULL};
+ 
+ #ifdef KRB5
+ extern ssh_gssapi_mech gssapi_kerberos_mech;
+@@ -100,25 +105,32 @@
+ 	char lname[NI_MAXHOST];
+ 	gss_OID_set oidset;
+ 
+-	gss_create_empty_oid_set(&status, &oidset);
+-	gss_add_oid_set_member(&status, ctx->oid, &oidset);
++	if (options.gss_strict_acceptor) {
++		gss_create_empty_oid_set(&status, &oidset);
++		gss_add_oid_set_member(&status, ctx->oid, &oidset);
++
++		if (gethostname(lname, sizeof(lname))) {
++			gss_release_oid_set(&status, &oidset);
++			return (-1);
++		}
+ 
+-	if (gethostname(lname, sizeof(lname))) {
+-		gss_release_oid_set(&status, &oidset);
+-		return (-1);
+-	}
++		if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
++			gss_release_oid_set(&status, &oidset);
++			return (ctx->major);
++		}
++
++		if ((ctx->major = gss_acquire_cred(&ctx->minor,
++		    ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, 
++		    NULL, NULL)))
++			ssh_gssapi_error(ctx);
+ 
+-	if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
+ 		gss_release_oid_set(&status, &oidset);
+ 		return (ctx->major);
++	} else {
++		ctx->name = GSS_C_NO_NAME;
++		ctx->creds = GSS_C_NO_CREDENTIAL;
+ 	}
+-
+-	if ((ctx->major = gss_acquire_cred(&ctx->minor,
+-	    ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, NULL, NULL)))
+-		ssh_gssapi_error(ctx);
+-
+-	gss_release_oid_set(&status, &oidset);
+-	return (ctx->major);
++	return GSS_S_COMPLETE;
+ }
+ 
+ /* Privileged */
+@@ -133,6 +145,29 @@
+ }
+ 
+ /* Unprivileged */
++char *
++ssh_gssapi_server_mechanisms() {
++	gss_OID_set	supported;
++
++	ssh_gssapi_supported_oids(&supported);
++	return (ssh_gssapi_kex_mechs(supported, &ssh_gssapi_server_check_mech,
++	    NULL, NULL));
++}
++
++/* Unprivileged */
++int
++ssh_gssapi_server_check_mech(Gssctxt **dum, gss_OID oid, const char *data,
++    const char *dummy) {
++	Gssctxt *ctx = NULL;
++	int res;
++ 
++	res = !GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctx, oid)));
++	ssh_gssapi_delete_ctx(&ctx);
++
++	return (res);
++}
++
++/* Unprivileged */
+ void
+ ssh_gssapi_supported_oids(gss_OID_set *oidset)
+ {
+@@ -142,7 +177,9 @@
+ 	gss_OID_set supported;
+ 
+ 	gss_create_empty_oid_set(&min_status, oidset);
+-	gss_indicate_mechs(&min_status, &supported);
++
++	if (GSS_ERROR(gss_indicate_mechs(&min_status, &supported)))
++		return;
+ 
+ 	while (supported_mechs[i]->name != NULL) {
+ 		if (GSS_ERROR(gss_test_oid_set_member(&min_status,
+@@ -268,8 +305,48 @@
+ ssh_gssapi_getclient(Gssctxt *ctx, ssh_gssapi_client *client)
+ {
+ 	int i = 0;
++	int equal = 0;
++	gss_name_t new_name = GSS_C_NO_NAME;
++	gss_buffer_desc ename = GSS_C_EMPTY_BUFFER;
++
++	if (options.gss_store_rekey && client->used && ctx->client_creds) {
++		if (client->mech->oid.length != ctx->oid->length ||
++		    (memcmp(client->mech->oid.elements,
++		     ctx->oid->elements, ctx->oid->length) !=0)) {
++			debug("Rekeyed credentials have different mechanism");
++			return GSS_S_COMPLETE;
++		}
++
++		if ((ctx->major = gss_inquire_cred_by_mech(&ctx->minor, 
++		    ctx->client_creds, ctx->oid, &new_name, 
++		    NULL, NULL, NULL))) {
++			ssh_gssapi_error(ctx);
++			return (ctx->major);
++		}
++
++		ctx->major = gss_compare_name(&ctx->minor, client->name, 
++		    new_name, &equal);
+ 
+-	gss_buffer_desc ename;
++		if (GSS_ERROR(ctx->major)) {
++			ssh_gssapi_error(ctx);
++			return (ctx->major);
++		}
++ 
++		if (!equal) {
++			debug("Rekeyed credentials have different name");
++			return GSS_S_COMPLETE;
++		}
++
++		debug("Marking rekeyed credentials for export");
++
++		gss_release_name(&ctx->minor, &client->name);
++		gss_release_cred(&ctx->minor, &client->creds);
++		client->name = new_name;
++		client->creds = ctx->client_creds;
++        	ctx->client_creds = GSS_C_NO_CREDENTIAL;
++		client->updated = 1;
++		return GSS_S_COMPLETE;
++	}
+ 
+ 	client->mech = NULL;
+ 
+@@ -284,6 +361,13 @@
+ 	if (client->mech == NULL)
+ 		return GSS_S_FAILURE;
+ 
++	if (ctx->client_creds &&
++	    (ctx->major = gss_inquire_cred_by_mech(&ctx->minor,
++	     ctx->client_creds, ctx->oid, &client->name, NULL, NULL, NULL))) {
++		ssh_gssapi_error(ctx);
++		return (ctx->major);
++	}
++
+ 	if ((ctx->major = gss_display_name(&ctx->minor, ctx->client,
+ 	    &client->displayname, NULL))) {
+ 		ssh_gssapi_error(ctx);
+@@ -301,6 +385,8 @@
+ 		return (ctx->major);
+ 	}
+ 
++	gss_release_buffer(&ctx->minor, &ename);
++
+ 	/* We can't copy this structure, so we just move the pointer to it */
+ 	client->creds = ctx->client_creds;
+ 	ctx->client_creds = GSS_C_NO_CREDENTIAL;
+@@ -348,7 +434,7 @@
+ 
+ /* Privileged */
+ int
+-ssh_gssapi_userok(char *user)
++ssh_gssapi_userok(char *user, struct passwd *pw)
+ {
+ 	OM_uint32 lmin;
+ 
+@@ -358,9 +444,11 @@
+ 		return 0;
+ 	}
+ 	if (gssapi_client.mech && gssapi_client.mech->userok)
+-		if ((*gssapi_client.mech->userok)(&gssapi_client, user))
++		if ((*gssapi_client.mech->userok)(&gssapi_client, user)) {
++			gssapi_client.used = 1;
++			gssapi_client.store.owner = pw;
+ 			return 1;
+-		else {
++		} else {
+ 			/* Destroy delegated credentials if userok fails */
+ 			gss_release_buffer(&lmin, &gssapi_client.displayname);
+ 			gss_release_buffer(&lmin, &gssapi_client.exportedname);
+@@ -374,14 +462,90 @@
+ 	return (0);
+ }
+ 
+-/* Privileged */
+-OM_uint32
+-ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
++/* These bits are only used for rekeying. The unpriviledged child is running 
++ * as the user, the monitor is root.
++ *
++ * In the child, we want to :
++ *    *) Ask the monitor to store our credentials into the store we specify
++ *    *) If it succeeds, maybe do a PAM update
++ */
++
++/* Stuff for PAM */
++
++#ifdef USE_PAM
++static int ssh_gssapi_simple_conv(int n, const struct pam_message **msg, 
++    struct pam_response **resp, void *data)
+ {
+-	ctx->major = gss_verify_mic(&ctx->minor, ctx->context,
+-	    gssbuf, gssmic, NULL);
++	return (PAM_CONV_ERR);
++}
++#endif
+ 
+-	return (ctx->major);
++void
++ssh_gssapi_rekey_creds() {
++	int ok;
++	int ret;
++#ifdef USE_PAM
++	pam_handle_t *pamh = NULL;
++	struct pam_conv pamconv = {ssh_gssapi_simple_conv, NULL};
++	char *envstr;
++#endif
++
++	if (gssapi_client.store.filename == NULL && 
++	    gssapi_client.store.envval == NULL &&
++	    gssapi_client.store.envvar == NULL)
++		return;
++ 
++	ok = PRIVSEP(ssh_gssapi_update_creds(&gssapi_client.store));
++
++	if (!ok)
++		return;
++
++	debug("Rekeyed credentials stored successfully");
++
++	/* Actually managing to play with the ssh pam stack from here will
++	 * be next to impossible. In any case, we may want different options
++	 * for rekeying. So, use our own :)
++	 */
++#ifdef USE_PAM	
++	if (!use_privsep) {
++		debug("Not even going to try and do PAM with privsep disabled");
++		return;
++	}
++
++	ret = pam_start("sshd-rekey", gssapi_client.store.owner->pw_name,
++ 	    &pamconv, &pamh);
++	if (ret)
++		return;
++
++	xasprintf(&envstr, "%s=%s", gssapi_client.store.envvar, 
++	    gssapi_client.store.envval);
++
++	ret = pam_putenv(pamh, envstr);
++	if (!ret)
++		pam_setcred(pamh, PAM_REINITIALIZE_CRED);
++	pam_end(pamh, PAM_SUCCESS);
++#endif
++}
++
++int 
++ssh_gssapi_update_creds(ssh_gssapi_ccache *store) {
++	int ok = 0;
++
++	/* Check we've got credentials to store */
++	if (!gssapi_client.updated)
++		return 0;
++
++	gssapi_client.updated = 0;
++
++	temporarily_use_uid(gssapi_client.store.owner);
++	if (gssapi_client.mech && gssapi_client.mech->updatecreds)
++		ok = (*gssapi_client.mech->updatecreds)(store, &gssapi_client);
++	else
++		debug("No update function for this mechanism");
++
++	restore_uid();
++
++	return ok;
+ }
+ 
+ #endif
+--- a/kex.c.old
++++ b/kex.c
+@@ -53,6 +53,10 @@
+ #include "roaming.h"
+ #include "digest.h"
+ 
++#ifdef GSSAPI
++#include "ssh-gss.h"
++#endif
++
+ #if OPENSSL_VERSION_NUMBER >= 0x00907000L
+ # if defined(HAVE_EVP_SHA256)
+ # define evp_ssh_sha256 EVP_sha256
+@@ -94,6 +98,11 @@
+ #ifdef HAVE_EVP_SHA256
+ 	{ KEX_CURVE25519_SHA256, KEX_C25519_SHA256, 0, SSH_DIGEST_SHA256 },
+ #endif /* HAVE_EVP_SHA256 */
++#ifdef GSSAPI
++	{ KEX_GSS_GEX_SHA1_ID, KEX_GSS_GEX_SHA1, 0, SSH_DIGEST_SHA1 },
++	{ KEX_GSS_GRP1_SHA1_ID, KEX_GSS_GRP1_SHA1, 0, SSH_DIGEST_SHA1 },
++	{ KEX_GSS_GRP14_SHA1_ID, KEX_GSS_GRP14_SHA1, 0, SSH_DIGEST_SHA1 },
++#endif
+ 	{ NULL, -1, -1, -1},
+ };
+ 
+--- a/kex.h.old
++++ b/kex.h
+@@ -76,6 +76,9 @@
+ 	KEX_DH_GEX_SHA256,
+ 	KEX_ECDH_SHA2,
+ 	KEX_C25519_SHA256,
++	KEX_GSS_GRP1_SHA1,
++	KEX_GSS_GRP14_SHA1,
++	KEX_GSS_GEX_SHA1,
+ 	KEX_MAX
+ };
+ 
+@@ -135,6 +138,12 @@
+ 	int	flags;
+ 	int	hash_alg;
+ 	int	ec_nid;
++#ifdef GSSAPI
++	int	gss_deleg_creds;
++	int	gss_trust_dns;
++	char    *gss_host;
++	char	*gss_client;
++#endif
+ 	char	*client_version_string;
+ 	char	*server_version_string;
+ 	int	(*verify_host_key)(Key *);
+@@ -167,6 +176,11 @@
+ void	 kexc25519_client(Kex *);
+ void	 kexc25519_server(Kex *);
+ 
++#ifdef GSSAPI
++void	kexgss_client(Kex *);
++void	kexgss_server(Kex *);
++#endif
++
+ void
+ kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
+     BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
+--- a/kexgssc.c.old
++++ b/kexgssc.c
+@@ -0,0 +1,334 @@
++/*
++ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
++ *
++ * 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.
++ */
++
++#include "includes.h"
++
++#ifdef GSSAPI
++
++#include "includes.h"
++
++#include <openssl/crypto.h>
++#include <openssl/bn.h>
++
++#include <string.h>
++
++#include "xmalloc.h"
++#include "buffer.h"
++#include "ssh2.h"
++#include "key.h"
++#include "cipher.h"
++#include "kex.h"
++#include "log.h"
++#include "packet.h"
++#include "dh.h"
++
++#include "ssh-gss.h"
++
++void
++kexgss_client(Kex *kex) {
++	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
++	gss_buffer_desc recv_tok, gssbuf, msg_tok, *token_ptr;
++	Gssctxt *ctxt;
++	OM_uint32 maj_status, min_status, ret_flags;
++	u_int klen, kout, slen = 0, hashlen, strlen;
++	DH *dh; 
++	BIGNUM *dh_server_pub = NULL;
++	BIGNUM *shared_secret = NULL;
++	BIGNUM *p = NULL;
++	BIGNUM *g = NULL;	
++	u_char *kbuf, *hash;
++	u_char *serverhostkey = NULL;
++	u_char *empty = "";
++	char *msg;
++	char *lang;
++	int type = 0;
++	int first = 1;
++	int nbits = 0, min = DH_GRP_MIN, max = DH_GRP_MAX;
++
++	/* Initialise our GSSAPI world */	
++	ssh_gssapi_build_ctx(&ctxt);
++	if (ssh_gssapi_id_kex(ctxt, kex->name, kex->kex_type) 
++	    == GSS_C_NO_OID)
++		fatal("Couldn't identify host exchange");
++
++	if (ssh_gssapi_import_name(ctxt, kex->gss_host))
++		fatal("Couldn't import hostname");
++
++	if (kex->gss_client && 
++	    ssh_gssapi_client_identity(ctxt, kex->gss_client))
++		fatal("Couldn't acquire client credentials");
++
++	switch (kex->kex_type) {
++	case KEX_GSS_GRP1_SHA1:
++		dh = dh_new_group1();
++		break;
++	case KEX_GSS_GRP14_SHA1:
++		dh = dh_new_group14();
++		break;
++	case KEX_GSS_GEX_SHA1:
++		debug("Doing group exchange\n");
++		nbits = dh_estimate(kex->we_need * 8);
++		packet_start(SSH2_MSG_KEXGSS_GROUPREQ);
++		packet_put_int(min);
++		packet_put_int(nbits);
++		packet_put_int(max);
++
++		packet_send();
++
++		packet_read_expect(SSH2_MSG_KEXGSS_GROUP);
++
++		if ((p = BN_new()) == NULL)
++			fatal("BN_new() failed");
++		packet_get_bignum2(p);
++		if ((g = BN_new()) == NULL)
++			fatal("BN_new() failed");
++		packet_get_bignum2(g);
++		packet_check_eom();
++
++		if (BN_num_bits(p) < min || BN_num_bits(p) > max)
++			fatal("GSSGRP_GEX group out of range: %d !< %d !< %d",
++			    min, BN_num_bits(p), max);
++
++		dh = dh_new_group(g, p);
++		break;
++	default:
++		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
++	}
++	
++	/* Step 1 - e is dh->pub_key */
++	dh_gen_key(dh, kex->we_need * 8);
++
++	/* This is f, we initialise it now to make life easier */
++	dh_server_pub = BN_new();
++	if (dh_server_pub == NULL)
++		fatal("dh_server_pub == NULL");
++
++	token_ptr = GSS_C_NO_BUFFER;
++			 
++	do {
++		debug("Calling gss_init_sec_context");
++		
++		maj_status = ssh_gssapi_init_ctx(ctxt,
++		    kex->gss_deleg_creds, token_ptr, &send_tok,
++		    &ret_flags);
++
++		if (GSS_ERROR(maj_status)) {
++			if (send_tok.length != 0) {
++				packet_start(SSH2_MSG_KEXGSS_CONTINUE);
++				packet_put_string(send_tok.value,
++				    send_tok.length);
++			}
++			fatal("gss_init_context failed");
++		}
++
++		/* If we've got an old receive buffer get rid of it */
++		if (token_ptr != GSS_C_NO_BUFFER)
++			free(recv_tok.value);
++
++		if (maj_status == GSS_S_COMPLETE) {
++			/* If mutual state flag is not true, kex fails */
++			if (!(ret_flags & GSS_C_MUTUAL_FLAG))
++				fatal("Mutual authentication failed");
++
++			/* If integ avail flag is not true kex fails */
++			if (!(ret_flags & GSS_C_INTEG_FLAG))
++				fatal("Integrity check failed");
++		}
++
++		/* 
++		 * If we have data to send, then the last message that we
++		 * received cannot have been a 'complete'. 
++		 */
++		if (send_tok.length != 0) {
++			if (first) {
++				packet_start(SSH2_MSG_KEXGSS_INIT);
++				packet_put_string(send_tok.value,
++				    send_tok.length);
++				packet_put_bignum2(dh->pub_key);
++				first = 0;
++			} else {
++				packet_start(SSH2_MSG_KEXGSS_CONTINUE);
++				packet_put_string(send_tok.value,
++				    send_tok.length);
++			}
++			packet_send();
++			gss_release_buffer(&min_status, &send_tok);
++
++			/* If we've sent them data, they should reply */
++			do {	
++				type = packet_read();
++				if (type == SSH2_MSG_KEXGSS_HOSTKEY) {
++					debug("Received KEXGSS_HOSTKEY");
++					if (serverhostkey)
++						fatal("Server host key received more than once");
++					serverhostkey = 
++					    packet_get_string(&slen);
++				}
++			} while (type == SSH2_MSG_KEXGSS_HOSTKEY);
++
++			switch (type) {
++			case SSH2_MSG_KEXGSS_CONTINUE:
++				debug("Received GSSAPI_CONTINUE");
++				if (maj_status == GSS_S_COMPLETE) 
++					fatal("GSSAPI Continue received from server when complete");
++				recv_tok.value = packet_get_string(&strlen);
++				recv_tok.length = strlen; 
++				break;
++			case SSH2_MSG_KEXGSS_COMPLETE:
++				debug("Received GSSAPI_COMPLETE");
++				packet_get_bignum2(dh_server_pub);
++				msg_tok.value =  packet_get_string(&strlen);
++				msg_tok.length = strlen; 
++
++				/* Is there a token included? */
++				if (packet_get_char()) {
++					recv_tok.value=
++					    packet_get_string(&strlen);
++					recv_tok.length = strlen;
++					/* If we're already complete - protocol error */
++					if (maj_status == GSS_S_COMPLETE)
++						packet_disconnect("Protocol error: received token when complete");
++					} else {
++						/* No token included */
++						if (maj_status != GSS_S_COMPLETE)
++							packet_disconnect("Protocol error: did not receive final token");
++				}
++				break;
++			case SSH2_MSG_KEXGSS_ERROR:
++				debug("Received Error");
++				maj_status = packet_get_int();
++				min_status = packet_get_int();
++				msg = packet_get_string(NULL);
++				lang = packet_get_string(NULL);
++				fatal("GSSAPI Error: \n%.400s",msg);
++			default:
++				packet_disconnect("Protocol error: didn't expect packet type %d",
++		    		type);
++			}
++			token_ptr = &recv_tok;
++		} else {
++			/* No data, and not complete */
++			if (maj_status != GSS_S_COMPLETE)
++				fatal("Not complete, and no token output");
++		}
++	} while (maj_status & GSS_S_CONTINUE_NEEDED);
++
++	/* 
++	 * We _must_ have received a COMPLETE message in reply from the 
++	 * server, which will have set dh_server_pub and msg_tok 
++	 */
++
++	if (type != SSH2_MSG_KEXGSS_COMPLETE)
++		fatal("Didn't receive a SSH2_MSG_KEXGSS_COMPLETE when I expected it");
++
++	/* Check f in range [1, p-1] */
++	if (!dh_pub_is_valid(dh, dh_server_pub))
++		packet_disconnect("bad server public DH value");
++
++	/* compute K=f^x mod p */
++	klen = DH_size(dh);
++	kbuf = xmalloc(klen);
++	kout = DH_compute_key(kbuf, dh_server_pub, dh);
++	if (kout < 0)
++		fatal("DH_compute_key: failed");
++
++	shared_secret = BN_new();
++	if (shared_secret == NULL)
++		fatal("kexgss_client: BN_new failed");
++
++	if (BN_bin2bn(kbuf, kout, shared_secret) == NULL)
++		fatal("kexdh_client: BN_bin2bn failed");
++
++	memset(kbuf, 0, klen);
++	free(kbuf);
++
++	switch (kex->kex_type) {
++	case KEX_GSS_GRP1_SHA1:
++	case KEX_GSS_GRP14_SHA1:
++		kex_dh_hash( kex->client_version_string, 
++		    kex->server_version_string,
++		    buffer_ptr(&kex->my), buffer_len(&kex->my),
++		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
++		    (serverhostkey ? serverhostkey : empty), slen,
++		    dh->pub_key,	/* e */
++		    dh_server_pub,	/* f */
++		    shared_secret,	/* K */
++		    &hash, &hashlen
++		);
++		break;
++	case KEX_GSS_GEX_SHA1:
++		kexgex_hash(
++		    kex->hash_alg,
++		    kex->client_version_string,
++		    kex->server_version_string,
++		    buffer_ptr(&kex->my), buffer_len(&kex->my),
++		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
++		    (serverhostkey ? serverhostkey : empty), slen,
++ 		    min, nbits, max,
++		    dh->p, dh->g,
++		    dh->pub_key,
++		    dh_server_pub,
++		    shared_secret,
++		    &hash, &hashlen
++		);
++		break;
++	default:
++		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
++	}
++
++	gssbuf.value = hash;
++	gssbuf.length = hashlen;
++
++	/* Verify that the hash matches the MIC we just got. */
++	if (GSS_ERROR(ssh_gssapi_checkmic(ctxt, &gssbuf, &msg_tok)))
++		packet_disconnect("Hash's MIC didn't verify");
++
++	free(msg_tok.value);
++
++	DH_free(dh);
++	if (serverhostkey)
++		free(serverhostkey);
++	BN_clear_free(dh_server_pub);
++
++	/* save session id */
++	if (kex->session_id == NULL) {
++		kex->session_id_len = hashlen;
++		kex->session_id = xmalloc(kex->session_id_len);
++		memcpy(kex->session_id, hash, kex->session_id_len);
++	}
++
++	if (kex->gss_deleg_creds)
++		ssh_gssapi_credentials_updated(ctxt);
++
++	if (gss_kex_context == NULL)
++		gss_kex_context = ctxt;
++	else
++		ssh_gssapi_delete_ctx(&ctxt);
++
++	kex_derive_keys_bn(kex, hash, hashlen, shared_secret);
++	BN_clear_free(shared_secret);
++	kex_finish(kex);
++}
++
++#endif /* GSSAPI */
+--- a/kexgsss.c.old
++++ b/kexgsss.c
+@@ -0,0 +1,289 @@
++/*
++ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
++ *
++ * 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.
++ */
++
++#include "includes.h"
++
++#ifdef GSSAPI
++
++#include <string.h>
++
++#include <openssl/crypto.h>
++#include <openssl/bn.h>
++
++#include "xmalloc.h"
++#include "buffer.h"
++#include "ssh2.h"
++#include "key.h"
++#include "cipher.h"
++#include "kex.h"
++#include "log.h"
++#include "packet.h"
++#include "dh.h"
++#include "ssh-gss.h"
++#include "monitor_wrap.h"
++#include "misc.h"
++#include "servconf.h"
++
++extern ServerOptions options;
++
++void
++kexgss_server(Kex *kex)
++{
++	OM_uint32 maj_status, min_status;
++	
++	/* 
++	 * Some GSSAPI implementations use the input value of ret_flags (an
++ 	 * output variable) as a means of triggering mechanism specific 
++ 	 * features. Initializing it to zero avoids inadvertently 
++ 	 * activating this non-standard behaviour.
++	 */
++
++	OM_uint32 ret_flags = 0;
++	gss_buffer_desc gssbuf, recv_tok, msg_tok;
++	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
++	Gssctxt *ctxt = NULL;
++	u_int slen, klen, kout, hashlen;
++	u_char *kbuf, *hash;
++	DH *dh;
++	int min = -1, max = -1, nbits = -1;
++	BIGNUM *shared_secret = NULL;
++	BIGNUM *dh_client_pub = NULL;
++	int type = 0;
++	gss_OID oid;
++	char *mechs;
++
++	/* Initialise GSSAPI */
++
++	/* If we're rekeying, privsep means that some of the private structures
++	 * in the GSSAPI code are no longer available. This kludges them back
++	 * into life
++	 */
++	if (!ssh_gssapi_oid_table_ok()) 
++		if ((mechs = ssh_gssapi_server_mechanisms()))
++			free(mechs);
++
++	debug2("%s: Identifying %s", __func__, kex->name);
++	oid = ssh_gssapi_id_kex(NULL, kex->name, kex->kex_type);
++	if (oid == GSS_C_NO_OID)
++	   fatal("Unknown gssapi mechanism");
++
++	debug2("%s: Acquiring credentials", __func__);
++
++	if (GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctxt, oid))))
++		fatal("Unable to acquire credentials for the server");
++
++	switch (kex->kex_type) {
++	case KEX_GSS_GRP1_SHA1:
++		dh = dh_new_group1();
++		break;
++	case KEX_GSS_GRP14_SHA1:
++		dh = dh_new_group14();
++		break;
++	case KEX_GSS_GEX_SHA1:
++		debug("Doing group exchange");
++		packet_read_expect(SSH2_MSG_KEXGSS_GROUPREQ);
++		min = packet_get_int();
++		nbits = packet_get_int();
++		max = packet_get_int();
++		min = MAX(DH_GRP_MIN, min);
++		max = MIN(DH_GRP_MAX, max);
++		packet_check_eom();
++		if (max < min || nbits < min || max < nbits)
++			fatal("GSS_GEX, bad parameters: %d !< %d !< %d",
++			    min, nbits, max);
++		dh = PRIVSEP(choose_dh(min, nbits, max));
++		if (dh == NULL)
++			packet_disconnect("Protocol error: no matching group found");
++
++		packet_start(SSH2_MSG_KEXGSS_GROUP);
++		packet_put_bignum2(dh->p);
++		packet_put_bignum2(dh->g);
++		packet_send();
++
++		packet_write_wait();
++		break;
++	default:
++		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
++	}
++
++	dh_gen_key(dh, kex->we_need * 8);
++
++	do {
++		debug("Wait SSH2_MSG_GSSAPI_INIT");
++		type = packet_read();
++		switch(type) {
++		case SSH2_MSG_KEXGSS_INIT:
++			if (dh_client_pub != NULL) 
++				fatal("Received KEXGSS_INIT after initialising");
++			recv_tok.value = packet_get_string(&slen);
++			recv_tok.length = slen; 
++
++			if ((dh_client_pub = BN_new()) == NULL)
++				fatal("dh_client_pub == NULL");
++
++			packet_get_bignum2(dh_client_pub);
++
++			/* Send SSH_MSG_KEXGSS_HOSTKEY here, if we want */
++			break;
++		case SSH2_MSG_KEXGSS_CONTINUE:
++			recv_tok.value = packet_get_string(&slen);
++			recv_tok.length = slen; 
++			break;
++		default:
++			packet_disconnect(
++			    "Protocol error: didn't expect packet type %d",
++			    type);
++		}
++
++		maj_status = PRIVSEP(ssh_gssapi_accept_ctx(ctxt, &recv_tok, 
++		    &send_tok, &ret_flags));
++
++		free(recv_tok.value);
++
++		if (maj_status != GSS_S_COMPLETE && send_tok.length == 0)
++			fatal("Zero length token output when incomplete");
++
++		if (dh_client_pub == NULL)
++			fatal("No client public key");
++		
++		if (maj_status & GSS_S_CONTINUE_NEEDED) {
++			debug("Sending GSSAPI_CONTINUE");
++			packet_start(SSH2_MSG_KEXGSS_CONTINUE);
++			packet_put_string(send_tok.value, send_tok.length);
++			packet_send();
++			gss_release_buffer(&min_status, &send_tok);
++		}
++	} while (maj_status & GSS_S_CONTINUE_NEEDED);
++
++	if (GSS_ERROR(maj_status)) {
++		if (send_tok.length > 0) {
++			packet_start(SSH2_MSG_KEXGSS_CONTINUE);
++			packet_put_string(send_tok.value, send_tok.length);
++			packet_send();
++		}
++		fatal("accept_ctx died");
++	}
++
++	if (!(ret_flags & GSS_C_MUTUAL_FLAG))
++		fatal("Mutual Authentication flag wasn't set");
++
++	if (!(ret_flags & GSS_C_INTEG_FLAG))
++		fatal("Integrity flag wasn't set");
++	
++	if (!dh_pub_is_valid(dh, dh_client_pub))
++		packet_disconnect("bad client public DH value");
++
++	klen = DH_size(dh);
++	kbuf = xmalloc(klen); 
++	kout = DH_compute_key(kbuf, dh_client_pub, dh);
++	if (kout < 0)
++		fatal("DH_compute_key: failed");
++
++	shared_secret = BN_new();
++	if (shared_secret == NULL)
++		fatal("kexgss_server: BN_new failed");
++
++	if (BN_bin2bn(kbuf, kout, shared_secret) == NULL)
++		fatal("kexgss_server: BN_bin2bn failed");
++
++	memset(kbuf, 0, klen);
++	free(kbuf);
++
++	switch (kex->kex_type) {
++	case KEX_GSS_GRP1_SHA1:
++	case KEX_GSS_GRP14_SHA1:
++		kex_dh_hash(
++		    kex->client_version_string, kex->server_version_string,
++		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
++		    buffer_ptr(&kex->my), buffer_len(&kex->my),
++		    NULL, 0, /* Change this if we start sending host keys */
++		    dh_client_pub, dh->pub_key, shared_secret,
++		    &hash, &hashlen
++		);
++		break;
++	case KEX_GSS_GEX_SHA1:
++		kexgex_hash(
++		    kex->hash_alg,
++		    kex->client_version_string, kex->server_version_string,
++		    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
++		    buffer_ptr(&kex->my), buffer_len(&kex->my),
++		    NULL, 0,
++		    min, nbits, max,
++		    dh->p, dh->g,
++		    dh_client_pub,
++		    dh->pub_key,
++		    shared_secret,
++		    &hash, &hashlen
++		);
++		break;
++	default:
++		fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type);
++	}
++
++	BN_clear_free(dh_client_pub);
++
++	if (kex->session_id == NULL) {
++		kex->session_id_len = hashlen;
++		kex->session_id = xmalloc(kex->session_id_len);
++		memcpy(kex->session_id, hash, kex->session_id_len);
++	}
++
++	gssbuf.value = hash;
++	gssbuf.length = hashlen;
++
++	if (GSS_ERROR(PRIVSEP(ssh_gssapi_sign(ctxt,&gssbuf,&msg_tok))))
++		fatal("Couldn't get MIC");
++
++	packet_start(SSH2_MSG_KEXGSS_COMPLETE);
++	packet_put_bignum2(dh->pub_key);
++	packet_put_string(msg_tok.value,msg_tok.length);
++
++	if (send_tok.length != 0) {
++		packet_put_char(1); /* true */
++		packet_put_string(send_tok.value, send_tok.length);
++	} else {
++		packet_put_char(0); /* false */
++	}
++	packet_send();
++
++	gss_release_buffer(&min_status, &send_tok);
++	gss_release_buffer(&min_status, &msg_tok);
++
++	if (gss_kex_context == NULL)
++		gss_kex_context = ctxt;
++	else 
++		ssh_gssapi_delete_ctx(&ctxt);
++
++	DH_free(dh);
++
++	kex_derive_keys_bn(kex, hash, hashlen, shared_secret);
++	BN_clear_free(shared_secret);
++	kex_finish(kex);
++
++	/* If this was a rekey, then save out any delegated credentials we
++	 * just exchanged.  */
++	if (options.gss_store_rekey)
++		ssh_gssapi_rekey_creds();
++}
++#endif /* GSSAPI */
+--- a/monitor.c.old
++++ b/monitor.c
+@@ -178,6 +178,8 @@
+ int mm_answer_gss_accept_ctx(int, Buffer *);
+ 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
+@@ -255,11 +257,18 @@
+     {MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx},
+     {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
+     {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic},
++    {MONITOR_REQ_GSSSIGN, MON_ONCE, mm_answer_gss_sign},
+ #endif
+     {0, 0, NULL}
+ };
+ 
+ struct mon_table mon_dispatch_postauth20[] = {
++#ifdef GSSAPI
++    {MONITOR_REQ_GSSSETUP, 0, mm_answer_gss_setup_ctx},
++    {MONITOR_REQ_GSSSTEP, 0, mm_answer_gss_accept_ctx},
++    {MONITOR_REQ_GSSSIGN, 0, mm_answer_gss_sign},
++    {MONITOR_REQ_GSSUPCREDS, 0, mm_answer_gss_updatecreds},
++#endif
+ #ifdef WITH_OPENSSL
+     {MONITOR_REQ_MODULI, 0, mm_answer_moduli},
+ #endif
+@@ -374,6 +383,10 @@
+ 		/* Permit requests for moduli and signatures */
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
++#ifdef GSSAPI
++		/* and for the GSSAPI key exchange */
++		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP, 1);
++#endif
+ 	} else {
+ 		mon_dispatch = mon_dispatch_proto15;
+ 
+@@ -482,6 +495,10 @@
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
++#ifdef GSSAPI
++		/* and for the GSSAPI key exchange */
++		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP, 1);
++#endif		
+ 	} else {
+ 		mon_dispatch = mon_dispatch_postauth15;
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
+@@ -1861,6 +1878,13 @@
+ 	kex->kex[KEX_ECDH_SHA2] = kexecdh_server;
+ #endif
+ 	kex->kex[KEX_C25519_SHA256] = kexc25519_server;
++#ifdef GSSAPI
++	if (options.gss_keyex) {
++		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
++		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_server;
++		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_server;
++	}
++#endif
+ 	kex->server = 1;
+ 	kex->hostkey_type = buffer_get_int(m);
+ 	kex->kex_type = buffer_get_int(m);
+@@ -2068,6 +2092,9 @@
+ 	OM_uint32 major;
+ 	u_int len;
+ 
++	if (!options.gss_authentication && !options.gss_keyex)
++		fatal("In GSSAPI monitor when GSSAPI is disabled");
++
+ 	goid.elements = buffer_get_string(m, &len);
+ 	goid.length = len;
+ 
+@@ -2095,6 +2122,9 @@
+ 	OM_uint32 flags = 0; /* GSI needs this */
+ 	u_int len;
+ 
++	if (!options.gss_authentication && !options.gss_keyex)
++		fatal("In GSSAPI monitor when GSSAPI is disabled");
++
+ 	in.value = buffer_get_string(m, &len);
+ 	in.length = len;
+ 	major = ssh_gssapi_accept_ctx(gsscontext, &in, &out, &flags);
+@@ -2112,6 +2142,7 @@
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 0);
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSUSEROK, 1);
+ 		monitor_permit(mon_dispatch, MONITOR_REQ_GSSCHECKMIC, 1);
++		monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
+ 	}
+ 	return (0);
+ }
+@@ -2123,6 +2154,9 @@
+ 	OM_uint32 ret;
+ 	u_int len;
+ 
++	if (!options.gss_authentication && !options.gss_keyex)
++		fatal("In GSSAPI monitor when GSSAPI is disabled");
++
+ 	gssbuf.value = buffer_get_string(m, &len);
+ 	gssbuf.length = len;
+ 	mic.value = buffer_get_string(m, &len);
+@@ -2149,7 +2183,11 @@
+ {
+ 	int authenticated;
+ 
+-	authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user);
++	if (!options.gss_authentication && !options.gss_keyex)
++		fatal("In GSSAPI monitor when GSSAPI is disabled");
++
++	authenticated = authctxt->valid && 
++	    ssh_gssapi_userok(authctxt->user, authctxt->pw);
+ 
+ 	buffer_clear(m);
+ 	buffer_put_int(m, authenticated);
+@@ -2162,5 +2200,73 @@
+ 	/* Monitor loop will terminate if authenticated */
+ 	return (authenticated);
+ }
++
++int 
++mm_answer_gss_sign(int socket, Buffer *m)
++{
++	gss_buffer_desc data;
++	gss_buffer_desc hash = GSS_C_EMPTY_BUFFER;
++	OM_uint32 major, minor;
++	u_int len;
++
++	if (!options.gss_authentication && !options.gss_keyex)
++		fatal("In GSSAPI monitor when GSSAPI is disabled");
++
++	data.value = buffer_get_string(m, &len);
++	data.length = len;
++	if (data.length != 20) 
++		fatal("%s: data length incorrect: %d", __func__, 
++		    (int) data.length);
++
++	/* Save the session ID on the first time around */
++	if (session_id2_len == 0) {
++		session_id2_len = data.length;
++		session_id2 = xmalloc(session_id2_len);
++		memcpy(session_id2, data.value, session_id2_len);
++	}
++	major = ssh_gssapi_sign(gsscontext, &data, &hash);
++
++	free(data.value);
++
++	buffer_clear(m);
++	buffer_put_int(m, major);
++	buffer_put_string(m, hash.value, hash.length);
++
++	mm_request_send(socket, MONITOR_ANS_GSSSIGN, m);
++
++	gss_release_buffer(&minor, &hash);
++
++	/* Turn on getpwnam permissions */
++	monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
++	
++	/* And credential updating, for when rekeying */
++	monitor_permit(mon_dispatch, MONITOR_REQ_GSSUPCREDS, 1);
++
++	return (0);
++}
++
++int
++mm_answer_gss_updatecreds(int socket, Buffer *m) {
++	ssh_gssapi_ccache store;
++	int ok;
++
++	store.filename = buffer_get_string(m, NULL);
++	store.envvar   = buffer_get_string(m, NULL);
++	store.envval   = buffer_get_string(m, NULL);
++
++	ok = ssh_gssapi_update_creds(&store);
++
++	free(store.filename);
++	free(store.envvar);
++	free(store.envval);
++
++	buffer_clear(m);
++	buffer_put_int(m, ok);
++
++	mm_request_send(socket, MONITOR_ANS_GSSUPCREDS, m);
++
++	return(0);
++}
++
+ #endif /* GSSAPI */
+ 
+--- a/monitor.h.old
++++ b/monitor.h
+@@ -57,6 +57,9 @@
+ 	MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49,
+ 	MONITOR_REQ_TERM = 50,
+ 
++	MONITOR_REQ_GSSSIGN = 62, MONITOR_ANS_GSSSIGN = 63,
++	MONITOR_REQ_GSSUPCREDS = 64, MONITOR_ANS_GSSUPCREDS = 65,
++
+ 	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,
+--- a/monitor_wrap.c.old
++++ b/monitor_wrap.c
+@@ -1281,7 +1281,7 @@
+ }
+ 
+ int
+-mm_ssh_gssapi_userok(char *user)
++mm_ssh_gssapi_userok(char *user, struct passwd *pw)
+ {
+ 	Buffer m;
+ 	int authenticated = 0;
+@@ -1298,5 +1298,50 @@
+ 	debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
+ 	return (authenticated);
+ }
++
++OM_uint32
++mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
++{
++	Buffer m;
++	OM_uint32 major;
++	u_int len;
++
++	buffer_init(&m);
++	buffer_put_string(&m, data->value, data->length);
++
++	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
++	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
++
++	major = buffer_get_int(&m);
++	hash->value = buffer_get_string(&m, &len);
++	hash->length = len;
++
++	buffer_free(&m);
++
++	return(major);
++}
++
++int
++mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
++{
++	Buffer m;
++	int ok;
++
++	buffer_init(&m);
++
++	buffer_put_cstring(&m, store->filename ? store->filename : "");
++	buffer_put_cstring(&m, store->envvar ? store->envvar : "");
++	buffer_put_cstring(&m, store->envval ? store->envval : "");
++	
++	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
++	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
++
++	ok = buffer_get_int(&m);
++
++	buffer_free(&m);
++	
++	return (ok);
++}
++
+ #endif /* GSSAPI */
+ 
+--- a/monitor_wrap.h.old
++++ b/monitor_wrap.h
+@@ -58,8 +58,10 @@
+ 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 *);
+-int mm_ssh_gssapi_userok(char *user);
++int mm_ssh_gssapi_userok(char *user, struct passwd *);
+ OM_uint32 mm_ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
++OM_uint32 mm_ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
++int mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *);
+ #endif
+ 
+ #ifdef USE_PAM
+--- a/readconf.c.old
++++ b/readconf.c
+@@ -142,6 +142,8 @@
+ 	oClearAllForwardings, oNoHostAuthenticationForLocalhost,
+ 	oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
+ 	oAddressFamily, oGssAuthentication, oGssDelegateCreds,
++	oGssTrustDns, oGssKeyEx, oGssClientIdentity, oGssRenewalRekey,
++	oGssServerIdentity, 
+ 	oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
+ 	oSendEnv, oControlPath, oControlMaster, oControlPersist,
+ 	oHashKnownHosts,
+@@ -188,10 +190,19 @@
+ 	{ "afstokenpassing", oUnsupported },
+ #if defined(GSSAPI)
+ 	{ "gssapiauthentication", oGssAuthentication },
++	{ "gssapikeyexchange", oGssKeyEx },
+ 	{ "gssapidelegatecredentials", oGssDelegateCreds },
++	{ "gssapitrustdns", oGssTrustDns },
++	{ "gssapiclientidentity", oGssClientIdentity },
++	{ "gssapiserveridentity", oGssServerIdentity },
++	{ "gssapirenewalforcesrekey", oGssRenewalRekey },
+ #else
+ 	{ "gssapiauthentication", oUnsupported },
++	{ "gssapikeyexchange", oUnsupported },
+ 	{ "gssapidelegatecredentials", oUnsupported },
++	{ "gssapitrustdns", oUnsupported },
++	{ "gssapiclientidentity", oUnsupported },
++	{ "gssapirenewalforcesrekey", oUnsupported },
+ #endif
+ 	{ "fallbacktorsh", oDeprecated },
+ 	{ "usersh", oDeprecated },
+@@ -871,10 +882,30 @@
+ 		intptr = &options->gss_authentication;
+ 		goto parse_flag;
+ 
++	case oGssKeyEx:
++		intptr = &options->gss_keyex;
++		goto parse_flag;
++
+ 	case oGssDelegateCreds:
+ 		intptr = &options->gss_deleg_creds;
+ 		goto parse_flag;
+ 
++	case oGssTrustDns:
++		intptr = &options->gss_trust_dns;
++		goto parse_flag;
++
++	case oGssClientIdentity:
++		charptr = &options->gss_client_identity;
++		goto parse_string;
++
++	case oGssServerIdentity:
++		charptr = &options->gss_server_identity;
++		goto parse_string;
++
++	case oGssRenewalRekey:
++		intptr = &options->gss_renewal_rekey;
++		goto parse_flag;
++
+ 	case oBatchMode:
+ 		intptr = &options->batch_mode;
+ 		goto parse_flag;
+@@ -1550,7 +1581,12 @@
+ 	options->pubkey_authentication = -1;
+ 	options->challenge_response_authentication = -1;
+ 	options->gss_authentication = -1;
++	options->gss_keyex = -1;
+ 	options->gss_deleg_creds = -1;
++	options->gss_trust_dns = -1;
++	options->gss_renewal_rekey = -1;
++	options->gss_client_identity = NULL;
++	options->gss_server_identity = NULL;
+ 	options->password_authentication = -1;
+ 	options->kbd_interactive_authentication = -1;
+ 	options->kbd_interactive_devices = NULL;
+@@ -1676,8 +1712,14 @@
+ 		options->challenge_response_authentication = 1;
+ 	if (options->gss_authentication == -1)
+ 		options->gss_authentication = 0;
++	if (options->gss_keyex == -1)
++		options->gss_keyex = 0;
+ 	if (options->gss_deleg_creds == -1)
+ 		options->gss_deleg_creds = 0;
++	if (options->gss_trust_dns == -1)
++		options->gss_trust_dns = 0;
++	if (options->gss_renewal_rekey == -1)
++		options->gss_renewal_rekey = 0;
+ 	if (options->password_authentication == -1)
+ 		options->password_authentication = 1;
+ 	if (options->kbd_interactive_authentication == -1)
+--- a/readconf.h.old
++++ b/readconf.h
+@@ -45,7 +45,12 @@
+ 	int     challenge_response_authentication;
+ 					/* Try S/Key or TIS, authentication. */
+ 	int     gss_authentication;	/* Try GSS authentication */
++	int     gss_keyex;		/* Try GSS key exchange */
+ 	int     gss_deleg_creds;	/* Delegate GSS credentials */
++	int	gss_trust_dns;		/* Trust DNS for GSS canonicalization */
++	int	gss_renewal_rekey;	/* Credential renewal forces rekey */
++	char    *gss_client_identity;   /* Principal to initiate GSSAPI with */
++	char    *gss_server_identity;   /* GSSAPI target principal */
+ 	int     password_authentication;	/* Try password
+ 						 * authentication. */
+ 	int     kbd_interactive_authentication; /* Try keyboard-interactive auth. */
+--- a/servconf.c.old
++++ b/servconf.c
+@@ -109,7 +109,10 @@
+ 	options->kerberos_ticket_cleanup = -1;
+ 	options->kerberos_get_afs_token = -1;
+ 	options->gss_authentication=-1;
++	options->gss_keyex = -1;
+ 	options->gss_cleanup_creds = -1;
++	options->gss_strict_acceptor = -1;
++	options->gss_store_rekey = -1;
+ 	options->password_authentication = -1;
+ 	options->kbd_interactive_authentication = -1;
+ 	options->challenge_response_authentication = -1;
+@@ -250,8 +253,14 @@
+ 		options->kerberos_get_afs_token = 0;
+ 	if (options->gss_authentication == -1)
+ 		options->gss_authentication = 0;
++	if (options->gss_keyex == -1)
++		options->gss_keyex = 0;
+ 	if (options->gss_cleanup_creds == -1)
+ 		options->gss_cleanup_creds = 1;
++	if (options->gss_strict_acceptor == -1)
++		options->gss_strict_acceptor = 1;
++	if (options->gss_store_rekey == -1)
++		options->gss_store_rekey = 0;
+ 	if (options->password_authentication == -1)
+ 		options->password_authentication = 0;
+ 	if (options->kbd_interactive_authentication == -1)
+@@ -352,7 +361,9 @@
+ 	sBanner, sUseDNS, sHostbasedAuthentication,
+ 	sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
+ 	sClientAliveCountMax, sAuthorizedKeysFile,
+-	sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
++	sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
++	sGssKeyEx, sGssStoreRekey,
++	sAcceptEnv, sPermitTunnel,
+ 	sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
+ 	sUsePrivilegeSeparation, sAllowAgentForwarding,
+ 	sHostCertificate,
+@@ -421,10 +432,20 @@
+ #ifdef GSSAPI
+ 	{ "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
+ 	{ "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
++	{ "gssapicleanupcreds", sGssCleanupCreds, SSHCFG_GLOBAL },
++	{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
++	{ "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL },
++	{ "gssapistorecredentialsonrekey", sGssStoreRekey, SSHCFG_GLOBAL },
+ #else
+ 	{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
+ 	{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
++	{ "gssapicleanupcreds", sUnsupported, SSHCFG_GLOBAL },
++	{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
++	{ "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL },
++	{ "gssapistorecredentialsonrekey", sUnsupported, SSHCFG_GLOBAL },
+ #endif
++	{ "gssusesessionccache", sUnsupported, SSHCFG_GLOBAL },
++	{ "gssapiusesessioncredcache", sUnsupported, SSHCFG_GLOBAL },
+ 	{ "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
+ 	{ "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
+ 	{ "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
+@@ -1104,10 +1125,22 @@
+ 		intptr = &options->gss_authentication;
+ 		goto parse_flag;
+ 
++	case sGssKeyEx:
++		intptr = &options->gss_keyex;
++		goto parse_flag;
++
+ 	case sGssCleanupCreds:
+ 		intptr = &options->gss_cleanup_creds;
+ 		goto parse_flag;
+ 
++	case sGssStrictAcceptor:
++		intptr = &options->gss_strict_acceptor;
++		goto parse_flag;
++
++	case sGssStoreRekey:
++		intptr = &options->gss_store_rekey;
++		goto parse_flag;
++
+ 	case sPasswordAuthentication:
+ 		intptr = &options->password_authentication;
+ 		goto parse_flag;
+@@ -2042,7 +2075,10 @@
+ #endif
+ #ifdef GSSAPI
+ 	dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
++	dump_cfg_fmtint(sGssKeyEx, o->gss_keyex);
+ 	dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
++	dump_cfg_fmtint(sGssStrictAcceptor, o->gss_strict_acceptor);
++	dump_cfg_fmtint(sGssStoreRekey, o->gss_store_rekey);
+ #endif
+ 	dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
+ 	dump_cfg_fmtint(sKbdInteractiveAuthentication,
+--- a/servconf.h.old
++++ b/servconf.h
+@@ -113,7 +113,10 @@
+ 	int     kerberos_get_afs_token;		/* If true, try to get AFS token if
+ 						 * authenticated with Kerberos. */
+ 	int     gss_authentication;	/* If true, permit GSSAPI authentication */
++	int     gss_keyex;		/* If true, permit GSSAPI key exchange */
+ 	int     gss_cleanup_creds;	/* If true, destroy cred cache on logout */
++	int 	gss_strict_acceptor;	/* If true, restrict the GSSAPI acceptor name */
++	int 	gss_store_rekey;
+ 	int     password_authentication;	/* If true, permit password
+ 						 * authentication. */
+ 	int     kbd_interactive_authentication;	/* If true, permit */
+--- a/ssh-gss.h.old
++++ b/ssh-gss.h
+@@ -1,6 +1,6 @@
+ /* $OpenBSD: ssh-gss.h,v 1.11 2014/02/26 20:28:44 djm Exp $ */
+ /*
+- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
++ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
+  *
+  * Redistribution and use in source and binary forms, with or without
+  * modification, are permitted provided that the following conditions
+@@ -61,10 +61,22 @@
+ 
+ #define SSH_GSS_OIDTYPE 0x06
+ 
++#define SSH2_MSG_KEXGSS_INIT                            30
++#define SSH2_MSG_KEXGSS_CONTINUE                        31
++#define SSH2_MSG_KEXGSS_COMPLETE                        32
++#define SSH2_MSG_KEXGSS_HOSTKEY                         33
++#define SSH2_MSG_KEXGSS_ERROR                           34
++#define SSH2_MSG_KEXGSS_GROUPREQ			40
++#define SSH2_MSG_KEXGSS_GROUP				41
++#define KEX_GSS_GRP1_SHA1_ID				"gss-group1-sha1-"
++#define KEX_GSS_GRP14_SHA1_ID				"gss-group14-sha1-"
++#define KEX_GSS_GEX_SHA1_ID				"gss-gex-sha1-"
++
+ typedef struct {
+ 	char *filename;
+ 	char *envvar;
+ 	char *envval;
++	struct passwd *owner;
+ 	void *data;
+ } ssh_gssapi_ccache;
+ 
+@@ -72,8 +84,11 @@
+ 	gss_buffer_desc displayname;
+ 	gss_buffer_desc exportedname;
+ 	gss_cred_id_t creds;
++	gss_name_t name;
+ 	struct ssh_gssapi_mech_struct *mech;
+ 	ssh_gssapi_ccache store;
++	int used;
++	int updated;
+ } ssh_gssapi_client;
+ 
+ typedef struct ssh_gssapi_mech_struct {
+@@ -84,6 +99,7 @@
+ 	int (*userok) (ssh_gssapi_client *, char *);
+ 	int (*localname) (ssh_gssapi_client *, char **);
+ 	void (*storecreds) (ssh_gssapi_client *);
++	int (*updatecreds) (ssh_gssapi_ccache *, ssh_gssapi_client *);
+ } ssh_gssapi_mech;
+ 
+ typedef struct {
+@@ -94,10 +110,11 @@
+ 	gss_OID		oid; /* client */
+ 	gss_cred_id_t	creds; /* server */
+ 	gss_name_t	client; /* server */
+-	gss_cred_id_t	client_creds; /* server */
++	gss_cred_id_t	client_creds; /* both */
+ } Gssctxt;
+ 
+ extern ssh_gssapi_mech *supported_mechs[];
++extern Gssctxt *gss_kex_context;
+ 
+ int  ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
+ void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
+@@ -119,16 +136,30 @@
+ void ssh_gssapi_delete_ctx(Gssctxt **);
+ OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
+ void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
+-int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *);
++int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *, const char *);
++OM_uint32 ssh_gssapi_client_identity(Gssctxt *, const char *);
++int ssh_gssapi_credentials_updated(Gssctxt *);
+ 
+ /* In the server */
++typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *, 
++    const char *);
++char *ssh_gssapi_client_mechanisms(const char *, const char *);
++char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *,
++    const char *);
++gss_OID ssh_gssapi_id_kex(Gssctxt *, char *, int);
++int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *, 
++    const char *);
+ OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
+-int ssh_gssapi_userok(char *name);
++int ssh_gssapi_userok(char *name, struct passwd *);
+ OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
+ void ssh_gssapi_do_child(char ***, u_int *);
+ void ssh_gssapi_cleanup_creds(void);
+ void ssh_gssapi_storecreds(void);
+ 
++char *ssh_gssapi_server_mechanisms(void);
++int ssh_gssapi_oid_table_ok();
++
++int ssh_gssapi_update_creds(ssh_gssapi_ccache *store);
+ #endif /* GSSAPI */
+ 
+ #endif /* _SSH_GSS_H */
+--- a/ssh_config.old
++++ b/ssh_config
+@@ -26,6 +26,8 @@
+ #   HostbasedAuthentication no
+ #   GSSAPIAuthentication no
+ #   GSSAPIDelegateCredentials no
++#   GSSAPIKeyExchange no
++#   GSSAPITrustDNS no
+ #   BatchMode no
+ #   CheckHostIP yes
+ #   AddressFamily any
+--- a/ssh_config.5.old
++++ b/ssh_config.5
+@@ -701,11 +701,43 @@
+ The default is
+ .Dq no .
+ Note that this option applies to protocol version 2 only.
++.It Cm GSSAPIKeyExchange
++Specifies whether key exchange based on GSSAPI may be used. When using
++GSSAPI key exchange the server need not have a host key.
++The default is
++.Dq no .
++Note that this option applies to protocol version 2 only.
++.It Cm GSSAPIClientIdentity
++If set, specifies the GSSAPI client identity that ssh should use when 
++connecting to the server. The default is unset, which means that the default 
++identity will be used.
++.It Cm GSSAPIServerIdentity
++If set, specifies the GSSAPI server identity that ssh should expect when 
++connecting to the server. The default is unset, which means that the
++expected GSSAPI server identity will be determined from the target
++hostname.
+ .It Cm GSSAPIDelegateCredentials
+ Forward (delegate) credentials to the server.
+ The default is
+ .Dq no .
+-Note that this option applies to protocol version 2 only.
++Note that this option applies to protocol version 2 connections using GSSAPI.
++.It Cm GSSAPIRenewalForcesRekey
++If set to 
++.Dq yes
++then renewal of the client's GSSAPI credentials will force the rekeying of the
++ssh connection. With a compatible server, this can delegate the renewed 
++credentials to a session on the server.
++The default is
++.Dq no .
++.It Cm GSSAPITrustDns
++Set to 
++.Dq yes to indicate that the DNS is trusted to securely canonicalize
++the name of the host being connected to. If 
++.Dq no, the hostname entered on the
++command line will be passed untouched to the GSSAPI library.
++The default is
++.Dq no .
++This option only applies to protocol version 2 connections using GSSAPI.
+ .It Cm HashKnownHosts
+ Indicates that
+ .Xr ssh 1
+--- a/sshconnect2.c.old
++++ b/sshconnect2.c
+@@ -160,9 +160,34 @@
+ 	char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
+ 	Kex *kex;
+ 
++#ifdef GSSAPI
++	char *orig = NULL, *gss = NULL;
++	char *gss_host = NULL;
++#endif
++
+ 	xxx_host = host;
+ 	xxx_hostaddr = hostaddr;
+ 
++#ifdef GSSAPI
++	if (options.gss_keyex) {
++		/* Add the GSSAPI mechanisms currently supported on this 
++		 * client to the key exchange algorithm proposal */
++		orig = myproposal[PROPOSAL_KEX_ALGS];
++
++		if (options.gss_trust_dns)
++			gss_host = (char *)get_canonical_hostname(1);
++		else
++			gss_host = host;
++
++		gss = ssh_gssapi_client_mechanisms(gss_host, options.gss_client_identity);
++		if (gss) {
++			debug("Offering GSSAPI proposal: %s", gss);
++			xasprintf(&myproposal[PROPOSAL_KEX_ALGS],
++			    "%s,%s", gss, orig);
++		}
++	}
++#endif
++
+ 	if (options.ciphers == (char *)-1) {
+ 		logit("No valid ciphers for protocol version 2 given, using defaults.");
+ 		options.ciphers = NULL;
+@@ -200,6 +225,17 @@
+ 	myproposal[PROPOSAL_KEX_ALGS] = compat_kex_proposal(
+ 	    myproposal[PROPOSAL_KEX_ALGS]);
+ 
++#ifdef GSSAPI
++	/* If we've got GSSAPI algorithms, then we also support the
++	 * 'null' hostkey, as a last resort */
++	if (options.gss_keyex && gss) {
++		orig = myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS];
++		xasprintf(&myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS], 
++		    "%s,null", orig);
++		free(gss);
++	}
++#endif
++
+ 	if (options.rekey_limit || options.rekey_interval)
+ 		packet_set_rekey_limits((u_int32_t)options.rekey_limit,
+ 		    (time_t)options.rekey_interval);
+@@ -214,10 +250,30 @@
+ 	kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
+ #endif
+ 	kex->kex[KEX_C25519_SHA256] = kexc25519_client;
++#ifdef GSSAPI
++	if (options.gss_keyex) {
++		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_client;
++		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_client;
++		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_client;
++	}
++#endif
+ 	kex->client_version_string=client_version_string;
+ 	kex->server_version_string=server_version_string;
+ 	kex->verify_host_key=&verify_host_key_callback;
+ 
++#ifdef GSSAPI
++	if (options.gss_keyex) {
++		kex->gss_deleg_creds = options.gss_deleg_creds;
++		kex->gss_trust_dns = options.gss_trust_dns;
++		kex->gss_client = options.gss_client_identity;
++		if (options.gss_server_identity) {
++			kex->gss_host = options.gss_server_identity;
++		} else {
++			kex->gss_host = gss_host;
++        }
++	}
++#endif
++
+ 	xxx_kex = kex;
+ 
+ 	dispatch_run(DISPATCH_BLOCK, &kex->done, kex);
+@@ -307,6 +363,7 @@
+ void	input_gssapi_hash(int type, u_int32_t, void *);
+ void	input_gssapi_error(int, u_int32_t, void *);
+ void	input_gssapi_errtok(int, u_int32_t, void *);
++int	userauth_gsskeyex(Authctxt *authctxt);
+ #endif
+ 
+ void	userauth(Authctxt *, char *);
+@@ -322,6 +379,11 @@
+ 
+ Authmethod authmethods[] = {
+ #ifdef GSSAPI
++	{"gssapi-keyex",
++		userauth_gsskeyex,
++		NULL,
++		&options.gss_authentication,
++		NULL},
+ 	{"gssapi-with-mic",
+ 		userauth_gssapi,
+ 		NULL,
+@@ -618,19 +680,31 @@
+ 	static u_int mech = 0;
+ 	OM_uint32 min;
+ 	int ok = 0;
++	const char *gss_host;
++
++	if (options.gss_server_identity)
++		gss_host = options.gss_server_identity;
++	else if (options.gss_trust_dns)
++		gss_host = get_canonical_hostname(1);
++	else
++		gss_host = authctxt->host;
+ 
+ 	/* Try one GSSAPI method at a time, rather than sending them all at
+ 	 * once. */
+ 
+ 	if (gss_supported == NULL)
+-		gss_indicate_mechs(&min, &gss_supported);
++		if (GSS_ERROR(gss_indicate_mechs(&min, &gss_supported))) {
++			gss_supported = NULL;
++			return 0;
++		}
+ 
+ 	/* Check to see if the mechanism is usable before we offer it */
+ 	while (mech < gss_supported->count && !ok) {
+ 		/* My DER encoding requires length<128 */
+ 		if (gss_supported->elements[mech].length < 128 &&
+ 		    ssh_gssapi_check_mechanism(&gssctxt, 
+-		    &gss_supported->elements[mech], authctxt->host)) {
++		    &gss_supported->elements[mech], gss_host, 
++                    options.gss_client_identity)) {
+ 			ok = 1; /* Mechanism works */
+ 		} else {
+ 			mech++;
+@@ -727,8 +801,8 @@
+ {
+ 	Authctxt *authctxt = ctxt;
+ 	Gssctxt *gssctxt;
+-	int oidlen;
+-	char *oidv;
++	u_int oidlen;
++	u_char *oidv;
+ 
+ 	if (authctxt == NULL)
+ 		fatal("input_gssapi_response: no authentication context");
+@@ -837,6 +911,48 @@
+ 	free(msg);
+ 	free(lang);
+ }
++
++int
++userauth_gsskeyex(Authctxt *authctxt)
++{
++	Buffer b;
++	gss_buffer_desc gssbuf;
++	gss_buffer_desc mic = GSS_C_EMPTY_BUFFER;
++	OM_uint32 ms;
++
++	static int attempt = 0;
++	if (attempt++ >= 1)
++		return (0);
++
++	if (gss_kex_context == NULL) {
++		debug("No valid Key exchange context"); 
++		return (0);
++	}
++
++	ssh_gssapi_buildmic(&b, authctxt->server_user, authctxt->service,
++	    "gssapi-keyex");
++
++	gssbuf.value = buffer_ptr(&b);
++	gssbuf.length = buffer_len(&b);
++
++	if (GSS_ERROR(ssh_gssapi_sign(gss_kex_context, &gssbuf, &mic))) {
++		buffer_free(&b);
++		return (0);
++	}
++
++	packet_start(SSH2_MSG_USERAUTH_REQUEST);
++	packet_put_cstring(authctxt->server_user);
++	packet_put_cstring(authctxt->service);
++	packet_put_cstring(authctxt->method->name);
++	packet_put_string(mic.value, mic.length);
++	packet_send();
++
++	buffer_free(&b);
++	gss_release_buffer(&ms, &mic);
++
++	return (1);
++}
++
+ #endif /* GSSAPI */
+ 
+ int
+--- a/sshd.c.old
++++ b/sshd.c
+@@ -123,6 +123,10 @@
+ #include "ssh-sandbox.h"
+ #include "version.h"
+ 
++#ifdef USE_SECURITY_SESSION_API
++#include <Security/AuthSession.h>
++#endif
++
+ #ifndef O_NOCTTY
+ #define O_NOCTTY	0
+ #endif
+@@ -1752,10 +1756,13 @@
+ 		logit("Disabling protocol version 1. Could not load host key");
+ 		options.protocol &= ~SSH_PROTO_1;
+ 	}
++#ifndef GSSAPI
++	/* The GSSAPI key exchange can run without a host key */
+ 	if ((options.protocol & SSH_PROTO_2) && !sensitive_data.have_ssh2_key) {
+ 		logit("Disabling protocol version 2. Could not load host key");
+ 		options.protocol &= ~SSH_PROTO_2;
+ 	}
++#endif
+ 	if (!(options.protocol & (SSH_PROTO_1|SSH_PROTO_2))) {
+ 		logit("sshd: no hostkeys available -- exiting.");
+ 		exit(1);
+@@ -2067,6 +2074,60 @@
+ 	    remote_ip, remote_port,
+ 	    get_local_ipaddr(sock_in), get_local_port());
+ 
++#ifdef USE_SECURITY_SESSION_API
++	/*
++	 * Create a new security session for use by the new user login if
++	 * the current session is the root session or we are not launched
++	 * by inetd (eg: debugging mode or server mode).  We do not
++	 * necessarily need to create a session if we are launched from
++	 * inetd because Panther xinetd will create a session for us.
++	 *
++	 * The only case where this logic will fail is if there is an
++	 * inetd running in a non-root session which is not creating
++	 * new sessions for us.  Then all the users will end up in the
++	 * same session (bad).
++	 *
++	 * When the client exits, the session will be destroyed for us
++	 * automatically.
++	 *
++	 * We must create the session before any credentials are stored
++	 * (including AFS pags, which happens a few lines below).
++	 */
++	{
++		OSStatus err = 0;
++		SecuritySessionId sid = 0;
++		SessionAttributeBits sattrs = 0;
++
++		err = SessionGetInfo(callerSecuritySession, &sid, &sattrs);
++		if (err)
++			error("SessionGetInfo() failed with error %.8X",
++			    (unsigned) err);
++		else
++			debug("Current Session ID is %.8X / Session Attributes are %.8X",
++			    (unsigned) sid, (unsigned) sattrs);
++
++		if (inetd_flag && !(sattrs & sessionIsRoot))
++			debug("Running in inetd mode in a non-root session... "
++			    "assuming inetd created the session for us.");
++		else {
++			debug("Creating new security session...");
++			err = SessionCreate(0, sessionHasTTY | sessionIsRemote);
++			if (err)
++				error("SessionCreate() failed with error %.8X",
++				    (unsigned) err);
++
++			err = SessionGetInfo(callerSecuritySession, &sid, 
++			    &sattrs);
++			if (err)
++				error("SessionGetInfo() failed with error %.8X",
++				    (unsigned) err);
++			else
++				debug("New Session ID is %.8X / Session Attributes are %.8X",
++				    (unsigned) sid, (unsigned) sattrs);
++		}
++	}
++#endif
++
+ 	/*
+ 	 * We don't want to listen forever unless the other side
+ 	 * successfully authenticates itself.  So we set up an alarm which is
+@@ -2489,6 +2550,48 @@
+ 	myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = compat_pkalg_proposal(
+ 	    list_hostkey_types());
+ 
++#ifdef GSSAPI
++	{
++	char *orig;
++	char *gss = NULL;
++	char *newstr = NULL;
++	orig = myproposal[PROPOSAL_KEX_ALGS];
++
++	/* 
++	 * If we don't have a host key, then there's no point advertising
++	 * the other key exchange algorithms
++	 */
++
++	if (strlen(myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS]) == 0)
++		orig = NULL;
++
++	if (options.gss_keyex)
++		gss = ssh_gssapi_server_mechanisms();
++	else
++		gss = NULL;
++
++	if (gss && orig)
++		xasprintf(&newstr, "%s,%s", gss, orig);
++	else if (gss)
++		newstr = gss;
++	else if (orig)
++		newstr = orig;
++
++	/* 
++	 * If we've got GSSAPI mechanisms, then we've got the 'null' host
++	 * key alg, but we can't tell people about it unless its the only
++  	 * host key algorithm we support
++	 */
++	if (gss && (strlen(myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS])) == 0)
++		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = "null";
++
++	if (newstr)
++		myproposal[PROPOSAL_KEX_ALGS] = newstr;
++	else
++		fatal("No supported key exchange algorithms");
++	}
++#endif
++
+ 	/* start key exchange */
+ 	kex = kex_setup(myproposal);
+ #ifdef WITH_OPENSSL
+@@ -2499,6 +2602,13 @@
+ 	kex->kex[KEX_ECDH_SHA2] = kexecdh_server;
+ #endif
+ 	kex->kex[KEX_C25519_SHA256] = kexc25519_server;
++#ifdef GSSAPI
++	if (options.gss_keyex) {
++		kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
++		kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_server;
++		kex->kex[KEX_GSS_GEX_SHA1] = kexgss_server;
++	}
++#endif
+ 	kex->server = 1;
+ 	kex->client_version_string=client_version_string;
+ 	kex->server_version_string=server_version_string;
+--- a/sshd_config.old
++++ b/sshd_config
+@@ -85,6 +85,8 @@
+ # GSSAPI options
+ #GSSAPIAuthentication no
+ #GSSAPICleanupCredentials yes
++#GSSAPIStrictAcceptorCheck yes
++#GSSAPIKeyExchange no
+ 
+ # Set this to 'yes' to enable PAM authentication, account processing,
+ # and session processing. If this is enabled, PAM authentication will
+--- a/sshd_config.5.old
++++ b/sshd_config.5
+@@ -527,12 +527,40 @@
+ The default is
+ .Dq no .
+ Note that this option applies to protocol version 2 only.
++.It Cm GSSAPIKeyExchange
++Specifies whether key exchange based on GSSAPI is allowed. GSSAPI key exchange
++doesn't rely on ssh keys to verify host identity.
++The default is
++.Dq no .
++Note that this option applies to protocol version 2 only.
+ .It Cm GSSAPICleanupCredentials
+ Specifies whether to automatically destroy the user's credentials cache
+ on logout.
+ The default is
+ .Dq yes .
+ Note that this option applies to protocol version 2 only.
++.It Cm GSSAPIStrictAcceptorCheck
++Determines whether to be strict about the identity of the GSSAPI acceptor 
++a client authenticates against. If
++.Dq yes
++then the client must authenticate against the
++.Pa host
++service on the current hostname. If 
++.Dq no
++then the client may authenticate against any service key stored in the 
++machine's default store. This facility is provided to assist with operation 
++on multi homed machines. 
++The default is
++.Dq yes .
++Note that this option applies only to protocol version 2 GSSAPI connections,
++and setting it to 
++.Dq no
++may only work with recent Kerberos GSSAPI libraries.
++.It Cm GSSAPIStoreCredentialsOnRekey
++Controls whether the user's GSSAPI credentials should be updated following a 
++successful connection rekeying. This option can be used to accepted renewed 
++or updated credentials from a compatible client. The default is
++.Dq no .
+ .It Cm HostbasedAuthentication
+ Specifies whether rhosts or /etc/hosts.equiv authentication together
+ with successful public key client host authentication is allowed
+--- a/sshkey.c.old
++++ b/sshkey.c
+@@ -105,6 +105,7 @@
+ 	    KEY_ECDSA_CERT, NID_secp521r1, 1 },
+ #  endif /* OPENSSL_HAS_NISTP521 */
+ # endif /* OPENSSL_HAS_ECC */
++	{ "null", "null", KEY_NULL, 0, 0 },
+ 	{ "ssh-rsa-cert-v00 at openssh.com", "RSA-CERT-V00",
+ 	    KEY_RSA_CERT_V00, 0, 1 },
+ 	{ "ssh-dss-cert-v00 at openssh.com", "DSA-CERT-V00",
+--- a/sshkey.h.old
++++ b/sshkey.h
+@@ -64,6 +64,7 @@
+ 	KEY_ED25519_CERT,
+ 	KEY_RSA_CERT_V00,
+ 	KEY_DSA_CERT_V00,
++	KEY_NULL,
+ 	KEY_UNSPEC
+ };
+ 
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