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📄 PROTOCOL.certkeys(11.91 KB)
📄 PROTOCOL.chacha20poly1305(4.52 KB)
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📄 PROTOCOL.mux(8.87 KB)
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📄 audit.c(5.69 KB)
📄 audit.h(2.27 KB)
📄 auth-bsdauth.c(3.65 KB)
📄 auth-krb5.c(6.93 KB)
📄 auth-options.c(23.45 KB)
📄 auth-options.h(2.75 KB)
📄 auth-pam.c(35.07 KB)
📄 auth-pam.h(1.89 KB)
📄 auth-passwd.c(6.42 KB)
📄 auth-rhosts.c(8.89 KB)
📄 auth-shadow.c(4.25 KB)
📄 auth-sia.c(3.15 KB)
📄 auth-sia.h(1.4 KB)
📄 auth-skey.c(2.75 KB)
📄 auth.c(32.86 KB)
📄 auth.h(7.95 KB)
📄 auth2-chall.c(9.77 KB)
📄 auth2-gss.c(9.63 KB)
📄 auth2-hostbased.c(8.08 KB)
📄 auth2-kbdint.c(2.2 KB)
📄 auth2-none.c(2.29 KB)
📄 auth2-passwd.c(2.36 KB)
📄 auth2-pubkey.c(28.79 KB)
📄 auth2.c(22.23 KB)
📄 authfd.c(14.47 KB)
📄 authfd.h(3.05 KB)
📄 authfile.c(12.59 KB)
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📄 bitmap.c(4.44 KB)
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📄 blacklist_client.h(2.09 KB)
📄 buildpkg.sh.in(17.64 KB)
📄 canohost.c(4.72 KB)
📄 canohost.h(842 B)
📄 chacha.c(5.28 KB)
📄 chacha.h(1000 B)
📄 channels.c(133.25 KB)
📄 channels.h(12.96 KB)
📄 cipher-aes.c(4.54 KB)
📄 cipher-aesctr.c(2.06 KB)
📄 cipher-aesctr.h(1.3 KB)
📄 cipher-chachapoly.c(3.72 KB)
📄 cipher-chachapoly.h(1.58 KB)
📄 cipher-ctr.c(3.57 KB)
📄 cipher.c(13.57 KB)
📄 cipher.h(3.15 KB)
📄 cleanup.c(1.01 KB)
📄 clientloop.c(66.05 KB)
📄 clientloop.h(3.69 KB)
📄 compat.c(6.62 KB)
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📄 configure.ac(147.81 KB)
📁 contrib
📄 crc32.c(4.92 KB)
📄 crc32.h(1.44 KB)
📄 crypto_api.h(1.12 KB)
📄 defines.h(21.73 KB)
📄 dh.c(15.14 KB)
📄 dh.h(2.59 KB)
📄 digest-libc.c(5.69 KB)
📄 digest-openssl.c(4.95 KB)
📄 digest.h(2.51 KB)
📄 dispatch.c(3.52 KB)
📄 dispatch.h(2.2 KB)
📄 dns.c(9.15 KB)
📄 dns.h(2.03 KB)
📄 ed25519.c(3.1 KB)
📄 entropy.c(6.34 KB)
📄 entropy.h(1.47 KB)
📄 fatal.c(1.63 KB)
📄 fe25519.c(8.13 KB)
📄 fe25519.h(2.31 KB)
📄 fixalgorithms(422 B)
📄 fixpaths(499 B)
📄 freebsd-configure.sh(1.07 KB)
📄 freebsd-namespace.sh(1.93 KB)
📄 freebsd-post-merge.sh(224 B)
📄 freebsd-pre-merge.sh(429 B)
📄 ge25519.c(11.04 KB)
📄 ge25519.h(1.35 KB)
📄 ge25519_base.data(164.61 KB)
📄 groupaccess.c(3.5 KB)
📄 groupaccess.h(1.53 KB)
📄 gss-genr.c(7.99 KB)
📄 gss-serv-krb5.c(5.63 KB)
📄 gss-serv.c(10.32 KB)
📄 hash.c(623 B)
📄 hmac.c(5.08 KB)
📄 hmac.h(1.62 KB)
📄 hostfile.c(21.7 KB)
📄 hostfile.h(3.8 KB)
📄 includes.h(3.85 KB)
📄 install-sh(13.67 KB)
📄 kex.c(25.9 KB)
📄 kex.h(7.32 KB)
📄 kexc25519.c(4.62 KB)
📄 kexc25519c.c(5.11 KB)
📄 kexc25519s.c(4.99 KB)
📄 kexdh.c(3.27 KB)
📄 kexdhc.c(6.13 KB)
📄 kexdhs.c(6.06 KB)
📄 kexecdh.c(3.49 KB)
📄 kexecdhc.c(6.22 KB)
📄 kexecdhs.c(5.94 KB)
📄 kexgex.c(3.67 KB)
📄 kexgexc.c(7.63 KB)
📄 kexgexs.c(7.35 KB)
📄 krb5_config.h(315 B)
📄 krl.c(35.63 KB)
📄 krl.h(2.67 KB)
📄 log.c(10.67 KB)
📄 log.h(2.64 KB)
📄 loginrec.c(41.91 KB)
📄 loginrec.h(4.6 KB)
📄 logintest.c(8.58 KB)
📄 mac.c(7.24 KB)
📄 mac.h(1.96 KB)
📄 match.c(9.14 KB)
📄 match.h(1.16 KB)
📄 md5crypt.c(3.98 KB)
📄 md5crypt.h(744 B)
📄 mdoc2man.awk(8.38 KB)
📄 misc.c(43.77 KB)
📄 misc.h(5.69 KB)
📄 mkinstalldirs(633 B)
📄 moduli(552 KB)
📄 moduli.5(3.6 KB)
📄 moduli.c(20.46 KB)
📄 monitor.c(50.56 KB)
📄 monitor.h(3.83 KB)
📄 monitor_fdpass.c(4.71 KB)
📄 monitor_fdpass.h(1.49 KB)
📄 monitor_wrap.c(27.44 KB)
📄 monitor_wrap.h(3.84 KB)
📄 msg.c(2.75 KB)
📄 msg.h(1.49 KB)
📄 mux.c(65.73 KB)
📄 myproposal.h(5.62 KB)
📄 nchan.c(12.06 KB)
📄 nchan.ms(3.86 KB)
📄 nchan2.ms(3.38 KB)
📄 opacket.c(5.55 KB)
📄 opacket.h(5.98 KB)
📁 openbsd-compat
📄 openssh.xml.in(2.77 KB)
📄 opensshd.init.in(1.86 KB)
📄 packet.c(70.79 KB)
📄 packet.h(7.39 KB)
📄 pathnames.h(5.69 KB)
📄 pkcs11.h(41.37 KB)
📄 platform-misc.c(1.09 KB)
📄 platform-pledge.c(1.86 KB)
📄 platform-tracing.c(1.69 KB)
📄 platform.c(4.71 KB)
📄 platform.h(1.43 KB)
📄 poly1305.c(4.54 KB)
📄 poly1305.h(645 B)
📄 progressmeter.c(7.48 KB)
📄 progressmeter.h(1.44 KB)
📄 readconf.c(81 KB)
📄 readconf.h(7.83 KB)
📄 readpass.c(4.99 KB)
📁 regress
📄 rijndael.c(51.57 KB)
📄 rijndael.h(2.07 KB)
📄 sandbox-capsicum.c(3.39 KB)
📄 sandbox-darwin.c(2.49 KB)
📄 sandbox-null.c(1.62 KB)
📄 sandbox-pledge.c(1.83 KB)
📄 sandbox-rlimit.c(2.43 KB)
📄 sandbox-seccomp-filter.c(9.88 KB)
📄 sandbox-solaris.c(2.9 KB)
📄 sandbox-systrace.c(6.27 KB)
📄 sc25519.c(7.16 KB)
📄 sc25519.h(2.83 KB)
📄 scp.1(5.56 KB)
📄 scp.c(39.14 KB)
📄 servconf.c(79.73 KB)
📄 servconf.h(10.13 KB)
📄 serverloop.c(26.03 KB)
📄 serverloop.h(1000 B)
📄 session.c(66.72 KB)
📄 session.h(2.59 KB)
📄 sftp-client.c(49.62 KB)
📄 sftp-client.h(4.29 KB)
📄 sftp-common.c(6.83 KB)
📄 sftp-common.h(2.02 KB)
📄 sftp-glob.c(3.38 KB)
📄 sftp-server-main.c(1.49 KB)
📄 sftp-server.8(4.98 KB)
📄 sftp-server.c(42.36 KB)
📄 sftp.1(14.53 KB)
📄 sftp.c(59.73 KB)
📄 sftp.h(3.33 KB)
📄 smult_curve25519_ref.c(6.71 KB)
📄 ssh-add.1(6.45 KB)
📄 ssh-add.c(17.69 KB)
📄 ssh-agent.1(7.16 KB)
📄 ssh-agent.c(33.19 KB)
📄 ssh-dss.c(5.55 KB)
📄 ssh-ecdsa.c(5.54 KB)
📄 ssh-ed25519.c(4.21 KB)
📄 ssh-gss.h(4.71 KB)
📄 ssh-keygen.1(26.5 KB)
📄 ssh-keygen.c(78.58 KB)
📄 ssh-keyscan.1(3.82 KB)
📄 ssh-keyscan.c(17.83 KB)
📄 ssh-keysign.8(2.95 KB)
📄 ssh-keysign.c(8.26 KB)
📄 ssh-pkcs11-client.c(6.65 KB)
📄 ssh-pkcs11-helper.8(1.33 KB)
📄 ssh-pkcs11-helper.c(9.79 KB)
📄 ssh-pkcs11.c(19.56 KB)
📄 ssh-pkcs11.h(1.06 KB)
📄 ssh-rsa.c(11.89 KB)
📄 ssh-sandbox.h(1.09 KB)
📄 ssh-xmss.c(5 KB)
📄 ssh.1(44.3 KB)
📄 ssh.c(61.58 KB)
📄 ssh.h(2.6 KB)
📄 ssh2.h(5.66 KB)
📄 ssh_api.c(13.81 KB)
📄 ssh_api.h(4.33 KB)
📄 ssh_config(1.53 KB)
📄 ssh_config.5(51.41 KB)
📄 ssh_namespace.h(44.25 KB)
📄 sshbuf-getput-basic.c(11.81 KB)
📄 sshbuf-getput-crypto.c(5.64 KB)
📄 sshbuf-misc.c(3.53 KB)
📄 sshbuf.c(8.96 KB)
📄 sshbuf.h(12.2 KB)
📄 sshconnect.c(43.92 KB)
📄 sshconnect.h(2.3 KB)
📄 sshconnect2.c(59.05 KB)
📄 sshd.8(30.87 KB)
📄 sshd.c(64.58 KB)
📄 sshd_config(3.18 KB)
📄 sshd_config.5(50.55 KB)
📄 ssherr.c(5.04 KB)
📄 ssherr.h(3.28 KB)
📄 sshkey-xmss.c(28.17 KB)
📄 sshkey-xmss.h(2.89 KB)
📄 sshkey.c(102.94 KB)
📄 sshkey.h(10.09 KB)
📄 sshlogin.c(5.25 KB)
📄 sshlogin.h(935 B)
📄 sshpty.c(5.59 KB)
📄 sshpty.h(1.03 KB)
📄 sshtty.c(2.95 KB)
📄 survey.sh.in(1.68 KB)
📄 ttymodes.c(10.1 KB)
📄 ttymodes.h(4.85 KB)
📄 uidswap.c(7.09 KB)
📄 uidswap.h(680 B)
📄 umac.c(44.91 KB)
📄 umac.h(4.58 KB)
📄 umac128.c(414 B)
📄 utf8.c(8.09 KB)
📄 utf8.h(1.17 KB)
📄 uuencode.c(2.94 KB)
📄 uuencode.h(1.5 KB)
📄 verify.c(668 B)
📄 version.h(385 B)
📄 xmalloc.c(2.41 KB)
📄 xmalloc.h(1.08 KB)
📄 xmss_commons.c(630 B)
📄 xmss_commons.h(450 B)
📄 xmss_fast.c(32.16 KB)
📄 xmss_fast.h(3.64 KB)
📄 xmss_hash.c(3.35 KB)
📄 xmss_hash.h(841 B)
📄 xmss_hash_address.c(1.2 KB)
📄 xmss_hash_address.h(836 B)
📄 xmss_wots.c(4.74 KB)
📄 xmss_wots.h(1.86 KB)

Editing: kexc25519c.c

/* $OpenBSD: kexc25519c.c,v 1.9 2017/12/18 02:25:15 djm Exp $ */
/*
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2010 Damien Miller.  All rights reserved.
 * Copyright (c) 2013 Aris Adamantiadis.  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 <stdio.h>
#include <string.h>
#include <signal.h>

#include "sshkey.h"
#include "cipher.h"
#include "kex.h"
#include "log.h"
#include "packet.h"
#include "ssh2.h"
#include "sshbuf.h"
#include "digest.h"
#include "ssherr.h"

static int
input_kex_c25519_reply(int type, u_int32_t seq, struct ssh *ssh);

int
kexc25519_client(struct ssh *ssh)
{
	struct kex *kex = ssh->kex;
	int r;

kexc25519_keygen(kex->c25519_client_key, kex->c25519_client_pubkey);
#ifdef DEBUG_KEXECDH
	dump_digest("client private key:", kex->c25519_client_key,
	    sizeof(kex->c25519_client_key));
#endif
	if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_INIT)) != 0 ||
	    (r = sshpkt_put_string(ssh, kex->c25519_client_pubkey,
	    sizeof(kex->c25519_client_pubkey))) != 0 ||
	    (r = sshpkt_send(ssh)) != 0)
		return r;

debug("expecting SSH2_MSG_KEX_ECDH_REPLY");
	ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_REPLY, &input_kex_c25519_reply);
	return 0;
}

static int
input_kex_c25519_reply(int type, u_int32_t seq, struct ssh *ssh)
{
	struct kex *kex = ssh->kex;
	struct sshkey *server_host_key = NULL;
	struct sshbuf *shared_secret = NULL;
	u_char *server_pubkey = NULL;
	u_char *server_host_key_blob = NULL, *signature = NULL;
	u_char hash[SSH_DIGEST_MAX_LENGTH];
	size_t slen, pklen, sbloblen, hashlen;
	int r;

if (kex->verify_host_key == NULL) {
		r = SSH_ERR_INVALID_ARGUMENT;
		goto out;
	}

/* hostkey */
	if ((r = sshpkt_get_string(ssh, &server_host_key_blob,
	    &sbloblen)) != 0 ||
	    (r = sshkey_from_blob(server_host_key_blob, sbloblen,
	    &server_host_key)) != 0)
		goto out;
	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;
	}
	if (kex->verify_host_key(server_host_key, ssh) == -1) {
		r = SSH_ERR_SIGNATURE_INVALID;
		goto out;
	}

/* Q_S, server public key */
	/* signed H */
	if ((r = sshpkt_get_string(ssh, &server_pubkey, &pklen)) != 0 ||
	    (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 ||
	    (r = sshpkt_get_end(ssh)) != 0)
		goto out;
	if (pklen != CURVE25519_SIZE) {
		r = SSH_ERR_SIGNATURE_INVALID;
		goto out;
	}

#ifdef DEBUG_KEXECDH
	dump_digest("server public key:", server_pubkey, CURVE25519_SIZE);
#endif

if ((shared_secret = sshbuf_new()) == NULL) {
		r = SSH_ERR_ALLOC_FAIL;
		goto out;
	}
	if ((r = kexc25519_shared_key(kex->c25519_client_key, server_pubkey,
	    shared_secret)) < 0)
		goto out;

/* calc and verify H */
	hashlen = sizeof(hash);
	if ((r = kex_c25519_hash(
	    kex->hash_alg,
	    kex->client_version_string,
	    kex->server_version_string,
	    sshbuf_ptr(kex->my), sshbuf_len(kex->my),
	    sshbuf_ptr(kex->peer), sshbuf_len(kex->peer),
	    server_host_key_blob, sbloblen,
	    kex->c25519_client_pubkey,
	    server_pubkey,
	    sshbuf_ptr(shared_secret), sshbuf_len(shared_secret),
	    hash, &hashlen)) < 0)
		goto out;

if ((r = sshkey_verify(server_host_key, signature, slen, hash, hashlen,
	    kex->hostkey_alg, ssh->compat)) != 0)
		goto out;

/* save session id */
	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);
	}

if ((r = kex_derive_keys(ssh, hash, hashlen, shared_secret)) == 0)
		r = kex_send_newkeys(ssh);
out:
	explicit_bzero(hash, sizeof(hash));
	explicit_bzero(kex->c25519_client_key, sizeof(kex->c25519_client_key));
	free(server_host_key_blob);
	free(server_pubkey);
	free(signature);
	sshkey_free(server_host_key);
	sshbuf_free(shared_secret);
	return r;
}

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Editing: kexc25519c.c

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