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/* $OpenBSD: myproposal.h,v 1.63 2019/12/15 18:57:30 djm Exp $ */
/*
* Copyright (c) 2000 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.
*/
#ifdef WITH_OPENSSL
#include <openssl/opensslv.h>
#endif
/* conditional algorithm support */
#ifdef OPENSSL_HAS_ECC
# ifdef OPENSSL_HAS_NISTP521
# define KEX_ECDH_METHODS \
"ecdh-sha2-nistp256," \
"ecdh-sha2-nistp384," \
"ecdh-sha2-nistp521,"
# define HOSTKEY_ECDSA_CERT_METHODS \
"ecdsa-sha2-nistp256-cert-v01@openssh.com," \
"ecdsa-sha2-nistp384-cert-v01@openssh.com," \
"ecdsa-sha2-nistp521-cert-v01@openssh.com," \
"sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,"
# define HOSTKEY_ECDSA_METHODS \
"ecdsa-sha2-nistp256," \
"ecdsa-sha2-nistp384," \
"ecdsa-sha2-nistp521," \
"sk-ecdsa-sha2-nistp256@openssh.com,"
# else /* OPENSSL_HAS_NISTP521 */
# define KEX_ECDH_METHODS \
"ecdh-sha2-nistp256," \
"ecdh-sha2-nistp384,"
# define HOSTKEY_ECDSA_CERT_METHODS \
"ecdsa-sha2-nistp256-cert-v01@openssh.com," \
"ecdsa-sha2-nistp384-cert-v01@openssh.com," \
"sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,"
# define HOSTKEY_ECDSA_METHODS \
"ecdsa-sha2-nistp256," \
"ecdsa-sha2-nistp384," \
"sk-ecdsa-sha2-nistp256@openssh.com,"
# endif /* OPENSSL_HAS_NISTP521 */
#else /* OPENSSL_HAS_ECC */
# define KEX_ECDH_METHODS
# define HOSTKEY_ECDSA_CERT_METHODS
# define HOSTKEY_ECDSA_METHODS
#endif /* OPENSSL_HAS_ECC */
#ifdef OPENSSL_HAVE_EVPGCM
# define AESGCM_CIPHER_MODES \
",aes128-gcm@openssh.com,aes256-gcm@openssh.com"
#else
# define AESGCM_CIPHER_MODES
#endif
#ifdef HAVE_EVP_SHA256
# define KEX_SHA2_METHODS \
"diffie-hellman-group-exchange-sha256," \
"diffie-hellman-group16-sha512," \
"diffie-hellman-group18-sha512,"
# define KEX_SHA2_GROUP14 \
"diffie-hellman-group14-sha256,"
#define SHA2_HMAC_MODES \
"hmac-sha2-256," \
"hmac-sha2-512,"
#else
# define KEX_SHA2_METHODS
# define KEX_SHA2_GROUP14
# define SHA2_HMAC_MODES
#endif
#ifdef WITH_OPENSSL
# ifdef HAVE_EVP_SHA256
# define KEX_CURVE25519_METHODS \
"curve25519-sha256," \
"curve25519-sha256@libssh.org,"
# else
# define KEX_CURVE25519_METHODS ""
# endif
#define KEX_SERVER_KEX \
KEX_CURVE25519_METHODS \
KEX_ECDH_METHODS \
KEX_SHA2_METHODS \
KEX_SHA2_GROUP14 \
"diffie-hellman-group14-sha1"
#define KEX_CLIENT_KEX KEX_SERVER_KEX
#define KEX_DEFAULT_PK_ALG \
HOSTKEY_ECDSA_CERT_METHODS \
"ssh-ed25519-cert-v01@openssh.com," \
"sk-ssh-ed25519-cert-v01@openssh.com," \
"rsa-sha2-512-cert-v01@openssh.com," \
"rsa-sha2-256-cert-v01@openssh.com," \
"ssh-rsa-cert-v01@openssh.com," \
HOSTKEY_ECDSA_METHODS \
"ssh-ed25519," \
"sk-ssh-ed25519@openssh.com," \
"rsa-sha2-512," \
"rsa-sha2-256," \
"ssh-rsa"
/* the actual algorithms */
#define KEX_SERVER_ENCRYPT \
"chacha20-poly1305@openssh.com," \
"aes128-ctr,aes192-ctr,aes256-ctr" \
AESGCM_CIPHER_MODES
#define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT
#define KEX_SERVER_MAC \
"umac-64-etm@openssh.com," \
"umac-128-etm@openssh.com," \
"hmac-sha2-256-etm@openssh.com," \
"hmac-sha2-512-etm@openssh.com," \
"hmac-sha1-etm@openssh.com," \
"umac-64@openssh.com," \
"umac-128@openssh.com," \
"hmac-sha2-256," \
"hmac-sha2-512," \
"hmac-sha1"
#define KEX_CLIENT_MAC KEX_SERVER_MAC
/* Not a KEX value, but here so all the algorithm defaults are together */
#define SSH_ALLOWED_CA_SIGALGS \
HOSTKEY_ECDSA_METHODS \
"ssh-ed25519," \
"sk-ssh-ed25519@openssh.com," \
"rsa-sha2-512," \
"rsa-sha2-256," \
"ssh-rsa"
#else /* WITH_OPENSSL */
#define KEX_SERVER_KEX \
"curve25519-sha256," \
"curve25519-sha256@libssh.org"
#define KEX_DEFAULT_PK_ALG \
"ssh-ed25519-cert-v01@openssh.com," \
"ssh-ed25519"
#define KEX_SERVER_ENCRYPT \
"chacha20-poly1305@openssh.com," \
"aes128-ctr,aes192-ctr,aes256-ctr"
#define KEX_SERVER_MAC \
"umac-64-etm@openssh.com," \
"umac-128-etm@openssh.com," \
"hmac-sha2-256-etm@openssh.com," \
"hmac-sha2-512-etm@openssh.com," \
"hmac-sha1-etm@openssh.com," \
"umac-64@openssh.com," \
"umac-128@openssh.com," \
"hmac-sha2-256," \
"hmac-sha2-512," \
"hmac-sha1"
#define KEX_CLIENT_KEX KEX_SERVER_KEX
#define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT
#define KEX_CLIENT_MAC KEX_SERVER_MAC
#define SSH_ALLOWED_CA_SIGALGS "ssh-ed25519,sk-ssh-ed25519@openssh.com"
#endif /* WITH_OPENSSL */
#define KEX_DEFAULT_COMP "none,zlib@openssh.com"
#define KEX_DEFAULT_LANG ""
#define KEX_CLIENT \
KEX_CLIENT_KEX, \
KEX_DEFAULT_PK_ALG, \
KEX_CLIENT_ENCRYPT, \
KEX_CLIENT_ENCRYPT, \
KEX_CLIENT_MAC, \
KEX_CLIENT_MAC, \
KEX_DEFAULT_COMP, \
KEX_DEFAULT_COMP, \
KEX_DEFAULT_LANG, \
KEX_DEFAULT_LANG
#define KEX_SERVER \
KEX_SERVER_KEX, \
KEX_DEFAULT_PK_ALG, \
KEX_SERVER_ENCRYPT, \
KEX_SERVER_ENCRYPT, \
KEX_SERVER_MAC, \
KEX_SERVER_MAC, \
KEX_DEFAULT_COMP, \
KEX_DEFAULT_COMP, \
KEX_DEFAULT_LANG, \
KEX_DEFAULT_LANG
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