diff options
Diffstat (limited to 'crypto/openssh/kexdhc.c')
| -rw-r--r-- | crypto/openssh/kexdhc.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/crypto/openssh/kexdhc.c b/crypto/openssh/kexdhc.c deleted file mode 100644 index fe6dc53f8591..000000000000 --- a/crypto/openssh/kexdhc.c +++ /dev/null @@ -1,137 +0,0 @@ -/* - * 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" -RCSID("$OpenBSD: kexdhc.c,v 1.1 2003/02/16 17:09:57 markus Exp $"); - -#include "xmalloc.h" -#include "key.h" -#include "kex.h" -#include "log.h" -#include "packet.h" -#include "dh.h" -#include "ssh2.h" - -void -kexdh_client(Kex *kex) -{ - BIGNUM *dh_server_pub = NULL, *shared_secret = NULL; - DH *dh; - Key *server_host_key; - u_char *server_host_key_blob = NULL, *signature = NULL; - u_char *kbuf, *hash; - u_int klen, kout, slen, sbloblen; - - /* generate and send 'e', client DH public key */ - dh = dh_new_group1(); - dh_gen_key(dh, kex->we_need * 8); - packet_start(SSH2_MSG_KEXDH_INIT); - packet_put_bignum2(dh->pub_key); - packet_send(); - - debug("sending SSH2_MSG_KEXDH_INIT"); -#ifdef DEBUG_KEXDH - DHparams_print_fp(stderr, dh); - fprintf(stderr, "pub= "); - BN_print_fp(stderr, dh->pub_key); - fprintf(stderr, "\n"); -#endif - - debug("expecting SSH2_MSG_KEXDH_REPLY"); - packet_read_expect(SSH2_MSG_KEXDH_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 paramter 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); - kout = DH_compute_key(kbuf, dh_server_pub, dh); -#ifdef DEBUG_KEXDH - dump_digest("shared secret", kbuf, kout); -#endif - if ((shared_secret = BN_new()) == NULL) - fatal("kexdh_client: BN_new failed"); - BN_bin2bn(kbuf, kout, shared_secret); - memset(kbuf, 0, klen); - xfree(kbuf); - - /* calc and verify H */ - hash = kex_dh_hash( - 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, - dh->pub_key, - dh_server_pub, - shared_secret - ); - xfree(server_host_key_blob); - BN_clear_free(dh_server_pub); - DH_free(dh); - - if (key_verify(server_host_key, signature, slen, hash, 20) != 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 = 20; - kex->session_id = xmalloc(kex->session_id_len); - memcpy(kex->session_id, hash, kex->session_id_len); - } - - kex_derive_keys(kex, hash, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); -} |