From 36331b5d6cf8f776a27fe6fc3ed19da4f4c2ad91 Mon Sep 17 00:00:00 2001
From: Darren Tucker <dtucker@zip.com.au>
Date: Fri, 8 Jan 2010 16:50:41 +1100
Subject: [PATCH]    - andreas@cvs.openbsd.org 2009/10/24 11:13:54     
 [sshconnect2.c kex.h kex.c]      Let the client detect if the server supports
 roaming by looking      for the resume@appgate.com kex algorithm.      ok
 markus@

---
 ChangeLog     |  5 +++++
 kex.c         | 13 ++++++++++++-
 kex.h         |  4 +++-
 sshconnect2.c |  7 ++++++-
 4 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 5935fa6ad..68f772b60 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,11 @@
      [roaming.h]
      Declarations needed for upcoming changes.
      ok markus@
+   - andreas@cvs.openbsd.org 2009/10/24 11:13:54
+     [sshconnect2.c kex.h kex.c]
+     Let the client detect if the server supports roaming by looking
+     for the resume@appgate.com kex algorithm.
+     ok markus@
 
 20091226
  - (tim) [contrib/cygwin/Makefile] Install ssh-copy-id and ssh-copy-id.1
diff --git a/kex.c b/kex.c
index f4f44f095..148cfee80 100644
--- a/kex.c
+++ b/kex.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.c,v 1.81 2009/05/27 06:34:36 andreas Exp $ */
+/* $OpenBSD: kex.c,v 1.82 2009/10/24 11:13:54 andreas Exp $ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
@@ -48,6 +48,7 @@
 #include "match.h"
 #include "dispatch.h"
 #include "monitor.h"
+#include "roaming.h"
 
 #if OPENSSL_VERSION_NUMBER >= 0x00907000L
 # if defined(HAVE_EVP_SHA256)
@@ -386,6 +387,16 @@ kex_choose_conf(Kex *kex)
 		sprop=peer;
 	}
 
+	/* Check whether server offers roaming */
+	if (!kex->server) {
+		char *roaming;
+		roaming = match_list(KEX_RESUME, peer[PROPOSAL_KEX_ALGS], NULL);
+		if (roaming) {
+			kex->roaming = 1;
+			xfree(roaming);
+		}
+	}
+
 	/* Algorithm Negotiation */
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		newkeys = xcalloc(1, sizeof(*newkeys));
diff --git a/kex.h b/kex.h
index 68c80c5a9..1fa13799d 100644
--- a/kex.h
+++ b/kex.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.h,v 1.47 2009/05/27 06:34:36 andreas Exp $ */
+/* $OpenBSD: kex.h,v 1.48 2009/10/24 11:13:54 andreas Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -36,6 +36,7 @@
 #define	KEX_DH14		"diffie-hellman-group14-sha1"
 #define	KEX_DHGEX_SHA1		"diffie-hellman-group-exchange-sha1"
 #define	KEX_DHGEX_SHA256	"diffie-hellman-group-exchange-sha256"
+#define	KEX_RESUME		"resume@appgate.com"
 
 #define COMP_NONE	0
 #define COMP_ZLIB	1
@@ -116,6 +117,7 @@ struct Kex {
 	char	*name;
 	int	hostkey_type;
 	int	kex_type;
+	int	roaming;
 	Buffer	my;
 	Buffer	peer;
 	sig_atomic_t done;
diff --git a/sshconnect2.c b/sshconnect2.c
index 1e0e9d5e1..937bb773d 100644
--- a/sshconnect2.c
+++ b/sshconnect2.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshconnect2.c,v 1.172 2009/10/23 01:57:11 djm Exp $ */
+/* $OpenBSD: sshconnect2.c,v 1.173 2009/10/24 11:13:54 andreas Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2008 Damien Miller.  All rights reserved.
@@ -152,6 +152,11 @@ ssh_kex2(char *host, struct sockaddr *hostaddr)
 
 	dispatch_run(DISPATCH_BLOCK, &kex->done, kex);
 
+	if (options.use_roaming && !kex->roaming) {
+		debug("Roaming not allowed by server");
+		options.use_roaming = 0;
+	}
+
 	session_id2 = kex->session_id;
 	session_id2_len = kex->session_id_len;