Let the client detect if the server supports roaming by looking

for the resume@appgate.com kex algorithm.
ok markus@

3 files changed, 21 insertions, 3 deletions

diff --git a/usr.bin/ssh/kex.c b/usr.bin/ssh/kex.c
index 9e2a81242e5..e7bd7a48a9f 100644
--- a/usr.bin/ssh/kex.c
+++ b/usr.bin/ssh/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.
  *
@@ -45,6 +45,7 @@
 #include "match.h"
 #include "dispatch.h"
 #include "monitor.h"
+#include "roaming.h"
 
 /* prototype */
 static void kex_kexinit_finish(Kex *);
@@ -373,6 +374,16 @@ 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/usr.bin/ssh/kex.h b/usr.bin/ssh/kex.h
index ba2529925be..6f904186567 100644
--- a/usr.bin/ssh/kex.h
+++ b/usr.bin/ssh/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.
@@ -35,6 +35,7 @@
 #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
@@ -115,6 +116,7 @@ struct Kex {
 	char	*name;
 	int	hostkey_type;
 	int	kex_type;
+	int	roaming;
 	Buffer	my;
 	Buffer	peer;
 	sig_atomic_t done;
diff --git a/usr.bin/ssh/sshconnect2.c b/usr.bin/ssh/sshconnect2.c
index cb0ce0915e2..0445a0fb0e6 100644
--- a/usr.bin/ssh/sshconnect2.c
+++ b/usr.bin/ssh/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.
@@ -146,6 +146,11 @@ 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;