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-rw-r--r--kexdhs.c222
1 files changed, 0 insertions, 222 deletions
diff --git a/kexdhs.c b/kexdhs.c
deleted file mode 100644
index 337aab5beb41..000000000000
--- a/kexdhs.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/* $OpenBSD: kexdhs.c,v 1.27 2018/04/10 00:10:49 djm Exp $ */
-/*
- * 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"
-
-#ifdef WITH_OPENSSL
-
-#include <sys/types.h>
-
-#include <stdarg.h>
-#include <string.h>
-#include <signal.h>
-
-#include <openssl/dh.h>
-
-#include "openbsd-compat/openssl-compat.h"
-
-#include "sshkey.h"
-#include "cipher.h"
-#include "digest.h"
-#include "kex.h"
-#include "log.h"
-#include "packet.h"
-#include "dh.h"
-#include "ssh2.h"
-
-#include "dispatch.h"
-#include "compat.h"
-#include "ssherr.h"
-#include "sshbuf.h"
-
-static int input_kex_dh_init(int, u_int32_t, struct ssh *);
-
-int
-kexdh_server(struct ssh *ssh)
-{
- struct kex *kex = ssh->kex;
- int r;
-
- /* generate server DH public key */
- switch (kex->kex_type) {
- case KEX_DH_GRP1_SHA1:
- kex->dh = dh_new_group1();
- break;
- case KEX_DH_GRP14_SHA1:
- case KEX_DH_GRP14_SHA256:
- kex->dh = dh_new_group14();
- break;
- case KEX_DH_GRP16_SHA512:
- kex->dh = dh_new_group16();
- break;
- case KEX_DH_GRP18_SHA512:
- kex->dh = dh_new_group18();
- break;
- default:
- r = SSH_ERR_INVALID_ARGUMENT;
- goto out;
- }
- if (kex->dh == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- if ((r = dh_gen_key(kex->dh, kex->we_need * 8)) != 0)
- goto out;
-
- debug("expecting SSH2_MSG_KEXDH_INIT");
- ssh_dispatch_set(ssh, SSH2_MSG_KEXDH_INIT, &input_kex_dh_init);
- r = 0;
- out:
- return r;
-}
-
-int
-input_kex_dh_init(int type, u_int32_t seq, struct ssh *ssh)
-{
- struct kex *kex = ssh->kex;
- BIGNUM *shared_secret = NULL, *dh_client_pub = NULL;
- const BIGNUM *pub_key;
- struct sshkey *server_host_public, *server_host_private;
- u_char *kbuf = NULL, *signature = NULL, *server_host_key_blob = NULL;
- u_char hash[SSH_DIGEST_MAX_LENGTH];
- size_t sbloblen, slen;
- size_t klen = 0, hashlen;
- int kout, r;
-
- if (kex->load_host_public_key == NULL ||
- kex->load_host_private_key == NULL) {
- r = SSH_ERR_INVALID_ARGUMENT;
- goto out;
- }
- server_host_public = kex->load_host_public_key(kex->hostkey_type,
- kex->hostkey_nid, ssh);
- server_host_private = kex->load_host_private_key(kex->hostkey_type,
- kex->hostkey_nid, ssh);
- if (server_host_public == NULL) {
- r = SSH_ERR_NO_HOSTKEY_LOADED;
- goto out;
- }
-
- /* key, cert */
- if ((dh_client_pub = BN_new()) == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- DH_get0_key(kex->dh, &pub_key, NULL);
- if ((r = sshpkt_get_bignum2(ssh, dh_client_pub)) != 0 ||
- (r = sshpkt_get_end(ssh)) != 0)
- goto out;
-
-#ifdef DEBUG_KEXDH
- fprintf(stderr, "dh_client_pub= ");
- BN_print_fp(stderr, dh_client_pub);
- fprintf(stderr, "\n");
- debug("bits %d", BN_num_bits(dh_client_pub));
- DHparams_print_fp(stderr, kex->dh);
- fprintf(stderr, "pub= ");
- BN_print_fp(stderr, pub_key);
- fprintf(stderr, "\n");
-#endif
- if (!dh_pub_is_valid(kex->dh, dh_client_pub)) {
- sshpkt_disconnect(ssh, "bad client public DH value");
- r = SSH_ERR_MESSAGE_INCOMPLETE;
- goto out;
- }
-
- klen = DH_size(kex->dh);
- if ((kbuf = malloc(klen)) == NULL ||
- (shared_secret = BN_new()) == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- if ((kout = DH_compute_key(kbuf, dh_client_pub, kex->dh)) < 0 ||
- BN_bin2bn(kbuf, kout, shared_secret) == NULL) {
- r = SSH_ERR_LIBCRYPTO_ERROR;
- goto out;
- }
-#ifdef DEBUG_KEXDH
- dump_digest("shared secret", kbuf, kout);
-#endif
- if ((r = sshkey_to_blob(server_host_public, &server_host_key_blob,
- &sbloblen)) != 0)
- goto out;
- /* calc H */
- hashlen = sizeof(hash);
- if ((r = kex_dh_hash(
- kex->hash_alg,
- kex->client_version_string,
- kex->server_version_string,
- sshbuf_ptr(kex->peer), sshbuf_len(kex->peer),
- sshbuf_ptr(kex->my), sshbuf_len(kex->my),
- server_host_key_blob, sbloblen,
- dh_client_pub,
- pub_key,
- shared_secret,
- hash, &hashlen)) != 0)
- goto out;
-
- /* save session id := H */
- if (kex->session_id == NULL) {
- kex->session_id_len = hashlen;
- kex->session_id = malloc(kex->session_id_len);
- if (kex->session_id == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- memcpy(kex->session_id, hash, kex->session_id_len);
- }
-
- /* sign H */
- if ((r = kex->sign(server_host_private, server_host_public, &signature,
- &slen, hash, hashlen, kex->hostkey_alg, ssh->compat)) < 0)
- goto out;
-
- /* destroy_sensitive_data(); */
-
- /* send server hostkey, DH pubkey 'f' and signed H */
- if ((r = sshpkt_start(ssh, SSH2_MSG_KEXDH_REPLY)) != 0 ||
- (r = sshpkt_put_string(ssh, server_host_key_blob, sbloblen)) != 0 ||
- (r = sshpkt_put_bignum2(ssh, pub_key)) != 0 || /* f */
- (r = sshpkt_put_string(ssh, signature, slen)) != 0 ||
- (r = sshpkt_send(ssh)) != 0)
- goto out;
-
- if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0)
- r = kex_send_newkeys(ssh);
- out:
- explicit_bzero(hash, sizeof(hash));
- DH_free(kex->dh);
- kex->dh = NULL;
- BN_clear_free(dh_client_pub);
- if (kbuf) {
- explicit_bzero(kbuf, klen);
- free(kbuf);
- }
- BN_clear_free(shared_secret);
- free(server_host_key_blob);
- free(signature);
- return r;
-}
-#endif /* WITH_OPENSSL */
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-04 14:44:49 +0000