merged OpenSSH 5.3p1 to trunk

[gssapi-openssh.git] / openssh / kex.c

diff --git a/openssh/kex.c b/openssh/kex.c
index 332fadf6e20b3ed5495926abbdad3220a8a40b03..71ccfe2858c8edc0d221e20b939e940ba982a4c6 100644 (file)
--- a/openssh/kex.c
+++ b/openssh/kex.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.c,v 1.79 2007/06/05 06:52:37 djm Exp $ */
+/* $OpenBSD: kex.c,v 1.81 2009/05/27 06:34:36 andreas Exp $ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
@@ -48,8 +48,11 @@
 #include "match.h"
 #include "dispatch.h"
 #include "monitor.h"
+#include "canohost.h"
 
-#define KEX_COOKIE_LEN 16
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
 
 #if OPENSSL_VERSION_NUMBER >= 0x00907000L
 # if defined(HAVE_EVP_SHA256)
@@ -64,7 +67,8 @@ static void kex_kexinit_finish(Kex *);
 static void kex_choose_conf(Kex *);
 
 /* put algorithm proposal into buffer */
-static void
+/* used in sshconnect.c as well as kex.c */
+void
 kex_prop2buf(Buffer *b, char *proposal[PROPOSAL_MAX])
 {
        u_int i;
@@ -326,6 +330,20 @@ choose_kex(Kex *k, char *client, char *server)
        } else if (strcmp(k->name, KEX_DHGEX_SHA256) == 0) {
                k->kex_type = KEX_DH_GEX_SHA256;
                k->evp_md = evp_ssh_sha256();
+#endif
+#ifdef GSSAPI
+       } else if (strncmp(k->name, KEX_GSS_GEX_SHA1_ID,
+           sizeof(KEX_GSS_GEX_SHA1_ID) - 1) == 0) {
+               k->kex_type = KEX_GSS_GEX_SHA1;
+               k->evp_md = EVP_sha1();
+       } else if (strncmp(k->name, KEX_GSS_GRP1_SHA1_ID,
+           sizeof(KEX_GSS_GRP1_SHA1_ID) - 1) == 0) {
+               k->kex_type = KEX_GSS_GRP1_SHA1;
+               k->evp_md = EVP_sha1();
+       } else if (strncmp(k->name, KEX_GSS_GRP14_SHA1_ID,
+           sizeof(KEX_GSS_GRP14_SHA1_ID) - 1) == 0) {
+               k->kex_type = KEX_GSS_GRP14_SHA1;
+               k->evp_md = EVP_sha1();
 #endif
        } else
                fatal("bad kex alg %s", k->name);
@@ -376,6 +394,13 @@ kex_choose_conf(Kex *kex)
        int nenc, nmac, ncomp;
        u_int mode, ctos, need;
        int first_kex_follows, type;
+       int log_flag = 0;
+
+       int auth_flag;
+
+       auth_flag = packet_authentication_state();
+
+       debug ("AUTH STATE IS %d", auth_flag);
 
        my   = kex_buf2prop(&kex->my, NULL);
        peer = kex_buf2prop(&kex->peer, &first_kex_follows);
@@ -400,11 +425,34 @@ kex_choose_conf(Kex *kex)
                choose_enc (&newkeys->enc,  cprop[nenc],  sprop[nenc]);
                choose_mac (&newkeys->mac,  cprop[nmac],  sprop[nmac]);
                choose_comp(&newkeys->comp, cprop[ncomp], sprop[ncomp]);
+               debug("REQUESTED ENC.NAME is '%s'", newkeys->enc.name);
+               if (strcmp(newkeys->enc.name, "none") == 0) {
+                               debug("Requesting NONE. Authflag is %d", auth_flag);                    
+                       if (auth_flag == 1) {
+                               debug("None requested post authentication.");
+                       } else {
+                               fatal("Pre-authentication none cipher requests are not allowed.");
+                       }
+               } 
                debug("kex: %s %s %s %s",
                    ctos ? "client->server" : "server->client",
                    newkeys->enc.name,
                    newkeys->mac.name,
                    newkeys->comp.name);
+               /* client starts withctos = 0 && log flag = 0 and no log*/
+               /* 2nd client pass ctos=1 and flag = 1 so no log*/
+               /* server starts with ctos =1 && log_flag = 0 so log */
+               /* 2nd sever pass ctos = 1 && log flag = 1 so no log*/
+               /* -cjr*/
+               if (ctos && !log_flag) {
+                       logit("SSH: Server;Ltype: Kex;Remote: %s-%d;Enc: %s;MAC: %s;Comp: %s",
+                             get_remote_ipaddr(),
+                             get_remote_port(),
+                             newkeys->enc.name,
+                             newkeys->mac.name,
+                             newkeys->comp.name);
+               }
+               log_flag = 1;
        }
        choose_kex(kex, cprop[PROPOSAL_KEX_ALGS], sprop[PROPOSAL_KEX_ALGS]);
        choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS],