summaryrefslogtreecommitdiffstats
path: root/crypto/openssh/kexgexc.c
diff options
context:
space:
mode:
authordes <des@FreeBSD.org>2008-07-22 19:01:18 +0000
committerdes <des@FreeBSD.org>2008-07-22 19:01:18 +0000
commitf1596419c2717cb81dd4b676d5e0cf1a3e30e98c (patch)
tree9827eb822991aa369cf5d220fce40c3d2011c19f /crypto/openssh/kexgexc.c
parent666aa9cc1660793c97ef29a6cb66dfbb894dde8f (diff)
downloadFreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.zip
FreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.tar.gz
Properly flatten openssh/dist.
Diffstat (limited to 'crypto/openssh/kexgexc.c')
-rw-r--r--crypto/openssh/kexgexc.c205
1 files changed, 0 insertions, 205 deletions
diff --git a/crypto/openssh/kexgexc.c b/crypto/openssh/kexgexc.c
deleted file mode 100644
index adb973d..0000000
--- a/crypto/openssh/kexgexc.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/* $OpenBSD: kexgexc.c,v 1.11 2006/11/06 21:25:28 markus Exp $ */
-/*
- * Copyright (c) 2000 Niels Provos. All rights reserved.
- * Copyright (c) 2001 Markus Friedl. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "includes.h"
-
-#include <sys/types.h>
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <string.h>
-#include <signal.h>
-
-#include "xmalloc.h"
-#include "buffer.h"
-#include "key.h"
-#include "cipher.h"
-#include "kex.h"
-#include "log.h"
-#include "packet.h"
-#include "dh.h"
-#include "ssh2.h"
-#include "compat.h"
-
-void
-kexgex_client(Kex *kex)
-{
- BIGNUM *dh_server_pub = NULL, *shared_secret = NULL;
- BIGNUM *p = NULL, *g = NULL;
- Key *server_host_key;
- u_char *kbuf, *hash, *signature = NULL, *server_host_key_blob = NULL;
- u_int klen, slen, sbloblen, hashlen;
- int kout;
- int min, max, nbits;
- DH *dh;
-
- nbits = dh_estimate(kex->we_need * 8);
-
- if (datafellows & SSH_OLD_DHGEX) {
- /* Old GEX request */
- packet_start(SSH2_MSG_KEX_DH_GEX_REQUEST_OLD);
- packet_put_int(nbits);
- min = DH_GRP_MIN;
- max = DH_GRP_MAX;
-
- debug("SSH2_MSG_KEX_DH_GEX_REQUEST_OLD(%u) sent", nbits);
- } else {
- /* New GEX request */
- min = DH_GRP_MIN;
- max = DH_GRP_MAX;
- packet_start(SSH2_MSG_KEX_DH_GEX_REQUEST);
- packet_put_int(min);
- packet_put_int(nbits);
- packet_put_int(max);
-
- debug("SSH2_MSG_KEX_DH_GEX_REQUEST(%u<%u<%u) sent",
- min, nbits, max);
- }
-#ifdef DEBUG_KEXDH
- fprintf(stderr, "\nmin = %d, nbits = %d, max = %d\n",
- min, nbits, max);
-#endif
- packet_send();
-
- debug("expecting SSH2_MSG_KEX_DH_GEX_GROUP");
- packet_read_expect(SSH2_MSG_KEX_DH_GEX_GROUP);
-
- if ((p = BN_new()) == NULL)
- fatal("BN_new");
- packet_get_bignum2(p);
- if ((g = BN_new()) == NULL)
- fatal("BN_new");
- packet_get_bignum2(g);
- packet_check_eom();
-
- if (BN_num_bits(p) < min || BN_num_bits(p) > max)
- fatal("DH_GEX group out of range: %d !< %d !< %d",
- min, BN_num_bits(p), max);
-
- dh = dh_new_group(g, p);
- dh_gen_key(dh, kex->we_need * 8);
-
-#ifdef DEBUG_KEXDH
- DHparams_print_fp(stderr, dh);
- fprintf(stderr, "pub= ");
- BN_print_fp(stderr, dh->pub_key);
- fprintf(stderr, "\n");
-#endif
-
- debug("SSH2_MSG_KEX_DH_GEX_INIT sent");
- /* generate and send 'e', client DH public key */
- packet_start(SSH2_MSG_KEX_DH_GEX_INIT);
- packet_put_bignum2(dh->pub_key);
- packet_send();
-
- debug("expecting SSH2_MSG_KEX_DH_GEX_REPLY");
- packet_read_expect(SSH2_MSG_KEX_DH_GEX_REPLY);
-
- /* key, cert */
- server_host_key_blob = packet_get_string(&sbloblen);
- server_host_key = key_from_blob(server_host_key_blob, sbloblen);
- if (server_host_key == NULL)
- fatal("cannot decode server_host_key_blob");
- if (server_host_key->type != kex->hostkey_type)
- fatal("type mismatch for decoded server_host_key_blob");
- if (kex->verify_host_key == NULL)
- fatal("cannot verify server_host_key");
- if (kex->verify_host_key(server_host_key) == -1)
- fatal("server_host_key verification failed");
-
- /* DH parameter f, server public DH key */
- if ((dh_server_pub = BN_new()) == NULL)
- fatal("dh_server_pub == NULL");
- packet_get_bignum2(dh_server_pub);
-
-#ifdef DEBUG_KEXDH
- fprintf(stderr, "dh_server_pub= ");
- BN_print_fp(stderr, dh_server_pub);
- fprintf(stderr, "\n");
- debug("bits %d", BN_num_bits(dh_server_pub));
-#endif
-
- /* signed H */
- signature = packet_get_string(&slen);
- packet_check_eom();
-
- if (!dh_pub_is_valid(dh, dh_server_pub))
- packet_disconnect("bad server public DH value");
-
- klen = DH_size(dh);
- kbuf = xmalloc(klen);
- if ((kout = DH_compute_key(kbuf, dh_server_pub, dh)) < 0)
- fatal("DH_compute_key: failed");
-#ifdef DEBUG_KEXDH
- dump_digest("shared secret", kbuf, kout);
-#endif
- if ((shared_secret = BN_new()) == NULL)
- fatal("kexgex_client: BN_new failed");
- if (BN_bin2bn(kbuf, kout, shared_secret) == NULL)
- fatal("kexgex_client: BN_bin2bn failed");
- memset(kbuf, 0, klen);
- xfree(kbuf);
-
- if (datafellows & SSH_OLD_DHGEX)
- min = max = -1;
-
- /* calc and verify H */
- kexgex_hash(
- kex->evp_md,
- kex->client_version_string,
- kex->server_version_string,
- buffer_ptr(&kex->my), buffer_len(&kex->my),
- buffer_ptr(&kex->peer), buffer_len(&kex->peer),
- server_host_key_blob, sbloblen,
- min, nbits, max,
- dh->p, dh->g,
- dh->pub_key,
- dh_server_pub,
- shared_secret,
- &hash, &hashlen
- );
-
- /* have keys, free DH */
- DH_free(dh);
- xfree(server_host_key_blob);
- BN_clear_free(dh_server_pub);
-
- if (key_verify(server_host_key, signature, slen, hash, hashlen) != 1)
- fatal("key_verify failed for server_host_key");
- key_free(server_host_key);
- xfree(signature);
-
- /* save session id */
- if (kex->session_id == NULL) {
- kex->session_id_len = hashlen;
- kex->session_id = xmalloc(kex->session_id_len);
- memcpy(kex->session_id, hash, kex->session_id_len);
- }
- kex_derive_keys(kex, hash, hashlen, shared_secret);
- BN_clear_free(shared_secret);
-
- kex_finish(kex);
-}
OpenPOWER on IntegriCloud