upstream commit

Don't send hostkey advertisments
 (hostkeys-00@openssh.com) to current versions of Tera Term as they can't
 handle them.  Newer versions should be OK.  Patch from Bryan Drewery and
 IWAMOTO Kouichi, ok djm@

3 files changed, 19 insertions, 3 deletions

diff --git a/compat.c b/compat.c
index 2498168d7..0934de90f 100644
--- a/compat.c
+++ b/compat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: compat.c,v 1.88 2015/04/07 23:00:42 djm Exp $ */
+/* $OpenBSD: compat.c,v 1.89 2015/04/10 05:16:50 dtucker Exp $ */
 /*
  * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  *
@@ -167,6 +167,17 @@ compat_datafellows(const char *version)
                                         SSH_BUG_SCANNER },
                 { "Probe-*",
                                         SSH_BUG_PROBE },
+                { "TeraTerm SSH*,"
+                  "TTSSH/1.5.*,"
+                  "TTSSH/2.1*,"
+                  "TTSSH/2.2*,"
+                  "TTSSH/2.3*,"
+                  "TTSSH/2.4*,"
+                  "TTSSH/2.5*,"
+                  "TTSSH/2.6*,"
+                  "TTSSH/2.70*,"
+                  "TTSSH/2.71*,"
+                  "TTSSH/2.72*",        SSH_BUG_HOSTKEYS },
                 { NULL,                 0 }
         };
 
diff --git a/compat.h b/compat.h
index af2f0073f..83507f070 100644
--- a/compat.h
+++ b/compat.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: compat.h,v 1.46 2015/01/19 20:20:20 markus Exp $ */
+/* $OpenBSD: compat.h,v 1.47 2015/04/10 05:16:50 dtucker Exp $ */
 
 /*
  * Copyright (c) 1999, 2000, 2001 Markus Friedl.  All rights reserved.
@@ -60,6 +60,7 @@
 #define SSH_NEW_OPENSSH         0x04000000
 #define SSH_BUG_DYNAMIC_RPORT   0x08000000
 #define SSH_BUG_CURVE25519PAD   0x10000000
+#define SSH_BUG_HOSTKEYS        0x20000000
 
 void     enable_compat13(void);
 void     enable_compat20(void);
diff --git a/sshd.c b/sshd.c
index 6aa17fa65..60b0cd4bb 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.445 2015/03/31 22:55:24 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.446 2015/04/10 05:16:50 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -928,6 +928,10 @@ notify_hostkeys(struct ssh *ssh)
         int i, nkeys, r;
         char *fp;
 
+        /* Some clients cannot cope with the hostkeys message, skip those. */
+        if (datafellows & SSH_BUG_HOSTKEYS)
+                return;
+
         if ((buf = sshbuf_new()) == NULL)
                 fatal("%s: sshbuf_new", __func__);
         for (i = nkeys = 0; i < options.num_host_key_files; i++) {