1 /* $OpenBSD: myproposal.h,v 1.57 2018/09/12 01:34:02 djm Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Markus Friedl. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <openssl/opensslv.h> 28 29 /* conditional algorithm support */ 30 31 #ifdef OPENSSL_HAS_ECC 32 #ifdef OPENSSL_HAS_NISTP521 33 # define KEX_ECDH_METHODS \ 34 "ecdh-sha2-nistp256," \ 35 "ecdh-sha2-nistp384," \ 36 "ecdh-sha2-nistp521," 37 # define HOSTKEY_ECDSA_CERT_METHODS \ 38 "ecdsa-sha2-nistp256-cert-v01@openssh.com," \ 39 "ecdsa-sha2-nistp384-cert-v01@openssh.com," \ 40 "ecdsa-sha2-nistp521-cert-v01@openssh.com," 41 # define HOSTKEY_ECDSA_METHODS \ 42 "ecdsa-sha2-nistp256," \ 43 "ecdsa-sha2-nistp384," \ 44 "ecdsa-sha2-nistp521," 45 #else 46 # define KEX_ECDH_METHODS \ 47 "ecdh-sha2-nistp256," \ 48 "ecdh-sha2-nistp384," 49 # define HOSTKEY_ECDSA_CERT_METHODS \ 50 "ecdsa-sha2-nistp256-cert-v01@openssh.com," \ 51 "ecdsa-sha2-nistp384-cert-v01@openssh.com," 52 # define HOSTKEY_ECDSA_METHODS \ 53 "ecdsa-sha2-nistp256," \ 54 "ecdsa-sha2-nistp384," 55 #endif 56 #else 57 # define KEX_ECDH_METHODS 58 # define HOSTKEY_ECDSA_CERT_METHODS 59 # define HOSTKEY_ECDSA_METHODS 60 #endif 61 62 #ifdef OPENSSL_HAVE_EVPGCM 63 # define AESGCM_CIPHER_MODES \ 64 ",aes128-gcm@openssh.com,aes256-gcm@openssh.com" 65 #else 66 # define AESGCM_CIPHER_MODES 67 #endif 68 69 #ifdef HAVE_EVP_SHA256 70 # define KEX_SHA2_METHODS \ 71 "diffie-hellman-group-exchange-sha256," \ 72 "diffie-hellman-group16-sha512," \ 73 "diffie-hellman-group18-sha512," 74 # define KEX_SHA2_GROUP14 \ 75 "diffie-hellman-group14-sha256," 76 #define SHA2_HMAC_MODES \ 77 "hmac-sha2-256," \ 78 "hmac-sha2-512," 79 #else 80 # define KEX_SHA2_METHODS 81 # define KEX_SHA2_GROUP14 82 # define SHA2_HMAC_MODES 83 #endif 84 85 #ifdef WITH_OPENSSL 86 # ifdef HAVE_EVP_SHA256 87 # define KEX_CURVE25519_METHODS \ 88 "curve25519-sha256," \ 89 "curve25519-sha256@libssh.org," 90 # else 91 # define KEX_CURVE25519_METHODS "" 92 # endif 93 #define KEX_COMMON_KEX \ 94 KEX_CURVE25519_METHODS \ 95 KEX_ECDH_METHODS \ 96 KEX_SHA2_METHODS 97 98 #define KEX_SERVER_KEX KEX_COMMON_KEX \ 99 KEX_SHA2_GROUP14 \ 100 "diffie-hellman-group14-sha1" \ 101 102 #define KEX_CLIENT_KEX KEX_COMMON_KEX \ 103 "diffie-hellman-group-exchange-sha1," \ 104 KEX_SHA2_GROUP14 \ 105 "diffie-hellman-group14-sha1" 106 107 #define KEX_DEFAULT_PK_ALG \ 108 HOSTKEY_ECDSA_CERT_METHODS \ 109 "ssh-ed25519-cert-v01@openssh.com," \ 110 "rsa-sha2-512-cert-v01@openssh.com," \ 111 "rsa-sha2-256-cert-v01@openssh.com," \ 112 "ssh-rsa-cert-v01@openssh.com," \ 113 HOSTKEY_ECDSA_METHODS \ 114 "ssh-ed25519," \ 115 "rsa-sha2-512," \ 116 "rsa-sha2-256," \ 117 "ssh-rsa" 118 119 /* the actual algorithms */ 120 121 #define KEX_SERVER_ENCRYPT \ 122 "chacha20-poly1305@openssh.com," \ 123 "aes128-ctr,aes192-ctr,aes256-ctr" \ 124 AESGCM_CIPHER_MODES 125 126 #define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT 127 128 #define KEX_SERVER_MAC \ 129 "umac-64-etm@openssh.com," \ 130 "umac-128-etm@openssh.com," \ 131 "hmac-sha2-256-etm@openssh.com," \ 132 "hmac-sha2-512-etm@openssh.com," \ 133 "hmac-sha1-etm@openssh.com," \ 134 "umac-64@openssh.com," \ 135 "umac-128@openssh.com," \ 136 "hmac-sha2-256," \ 137 "hmac-sha2-512," \ 138 "hmac-sha1" 139 140 #define KEX_CLIENT_MAC KEX_SERVER_MAC 141 142 /* Not a KEX value, but here so all the algorithm defaults are together */ 143 #define SSH_ALLOWED_CA_SIGALGS \ 144 "ecdsa-sha2-nistp256," \ 145 "ecdsa-sha2-nistp384," \ 146 "ecdsa-sha2-nistp521," \ 147 "ssh-ed25519," \ 148 "rsa-sha2-512," \ 149 "rsa-sha2-256," \ 150 "ssh-rsa" 151 152 #else /* WITH_OPENSSL */ 153 154 #define KEX_SERVER_KEX \ 155 "curve25519-sha256," \ 156 "curve25519-sha256@libssh.org" 157 #define KEX_DEFAULT_PK_ALG \ 158 "ssh-ed25519-cert-v01@openssh.com," \ 159 "ssh-ed25519" 160 #define KEX_SERVER_ENCRYPT \ 161 "chacha20-poly1305@openssh.com," \ 162 "aes128-ctr,aes192-ctr,aes256-ctr" 163 #define KEX_SERVER_MAC \ 164 "umac-64-etm@openssh.com," \ 165 "umac-128-etm@openssh.com," \ 166 "hmac-sha2-256-etm@openssh.com," \ 167 "hmac-sha2-512-etm@openssh.com," \ 168 "hmac-sha1-etm@openssh.com," \ 169 "umac-64@openssh.com," \ 170 "umac-128@openssh.com," \ 171 "hmac-sha2-256," \ 172 "hmac-sha2-512," \ 173 "hmac-sha1" 174 175 #define KEX_CLIENT_KEX KEX_SERVER_KEX 176 #define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT 177 #define KEX_CLIENT_MAC KEX_SERVER_MAC 178 179 #define SSH_ALLOWED_CA_SIGALGS "ssh-ed25519" 180 181 #endif /* WITH_OPENSSL */ 182 183 #define KEX_DEFAULT_COMP "none,zlib@openssh.com" 184 #define KEX_DEFAULT_LANG "" 185 186 #define KEX_CLIENT \ 187 KEX_CLIENT_KEX, \ 188 KEX_DEFAULT_PK_ALG, \ 189 KEX_CLIENT_ENCRYPT, \ 190 KEX_CLIENT_ENCRYPT, \ 191 KEX_CLIENT_MAC, \ 192 KEX_CLIENT_MAC, \ 193 KEX_DEFAULT_COMP, \ 194 KEX_DEFAULT_COMP, \ 195 KEX_DEFAULT_LANG, \ 196 KEX_DEFAULT_LANG 197 198 #define KEX_SERVER \ 199 KEX_SERVER_KEX, \ 200 KEX_DEFAULT_PK_ALG, \ 201 KEX_SERVER_ENCRYPT, \ 202 KEX_SERVER_ENCRYPT, \ 203 KEX_SERVER_MAC, \ 204 KEX_SERVER_MAC, \ 205 KEX_DEFAULT_COMP, \ 206 KEX_DEFAULT_COMP, \ 207 KEX_DEFAULT_LANG, \ 208 KEX_DEFAULT_LANG 209 210