upstream commit

correctly match ECDSA subtype (== curve) for
 offered/recevied host keys. Fixes connection-killing host key mismatches when
 a server offers multiple ECDSA keys with different curve type (an extremely
 unlikely configuration).

ok markus, "looks mechanical" deraadt@

1 files changed, 4 insertions, 2 deletions

diff --git a/kexecdhc.c b/kexecdhc.c
index 3f362c5b1..90220ce82 100644
--- a/kexecdhc.c
+++ b/kexecdhc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: kexecdhc.c,v 1.9 2015/01/19 20:16:15 markus Exp $ */
+/* $OpenBSD: kexecdhc.c,v 1.10 2015/01/26 06:10:03 djm Exp $ */
 /*
  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  * Copyright (c) 2010 Damien Miller.  All rights reserved.
@@ -124,7 +124,9 @@ input_kex_ecdh_reply(int type, u_int32_t seq, void *ctxt)
             (r = sshkey_from_blob(server_host_key_blob, sbloblen,
             &server_host_key)) != 0)
                 goto out;
-        if (server_host_key->type != kex->hostkey_type) {
+        if (server_host_key->type != kex->hostkey_type ||
+            (kex->hostkey_type == KEY_ECDSA &&
+            server_host_key->ecdsa_nid != kex->hostkey_nid)) {
                 r = SSH_ERR_KEY_TYPE_MISMATCH;
                 goto out;
         }