1 /* $OpenBSD: ssh2.h,v 1.21 2023/08/28 03:28:43 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 /* 28 * RFC4251: 29 * 30 * Transport layer protocol: 31 * 32 * 1-19 Transport layer generic (e.g. disconnect, ignore, debug, 33 * etc) 34 * 20-29 Algorithm negotiation 35 * 30-49 Key exchange method specific (numbers can be reused for 36 * different authentication methods) 37 * 38 * User authentication protocol: 39 * 40 * 50-59 User authentication generic 41 * 60-79 User authentication method specific (numbers can be reused 42 * for different authentication methods) 43 * 44 * Connection protocol: 45 * 46 * 80-89 Connection protocol generic 47 * 90-127 Channel related messages 48 * 49 * Reserved for client protocols: 50 * 51 * 128-191 Reserved 52 * 53 * Local extensions: 54 * 55 * 192-255 Local extensions 56 */ 57 58 /* special marker for no message */ 59 60 #define SSH_MSG_NONE 0 61 62 /* ranges */ 63 64 #define SSH2_MSG_TRANSPORT_MIN 1 65 #define SSH2_MSG_TRANSPORT_MAX 49 66 #define SSH2_MSG_USERAUTH_MIN 50 67 #define SSH2_MSG_USERAUTH_MAX 79 68 #define SSH2_MSG_USERAUTH_PER_METHOD_MIN 60 69 #define SSH2_MSG_USERAUTH_PER_METHOD_MAX SSH2_MSG_USERAUTH_MAX 70 #define SSH2_MSG_CONNECTION_MIN 80 71 #define SSH2_MSG_CONNECTION_MAX 127 72 #define SSH2_MSG_RESERVED_MIN 128 73 #define SSH2_MSG_RESERVED_MAX 191 74 #define SSH2_MSG_LOCAL_MIN 192 75 #define SSH2_MSG_LOCAL_MAX 255 76 #define SSH2_MSG_MIN 1 77 #define SSH2_MSG_MAX 255 78 79 /* transport layer: generic */ 80 81 #define SSH2_MSG_DISCONNECT 1 82 #define SSH2_MSG_IGNORE 2 83 #define SSH2_MSG_UNIMPLEMENTED 3 84 #define SSH2_MSG_DEBUG 4 85 #define SSH2_MSG_SERVICE_REQUEST 5 86 #define SSH2_MSG_SERVICE_ACCEPT 6 87 #define SSH2_MSG_EXT_INFO 7 88 #define SSH2_MSG_NEWCOMPRESS 8 89 90 /* transport layer: alg negotiation */ 91 92 #define SSH2_MSG_KEXINIT 20 93 #define SSH2_MSG_NEWKEYS 21 94 95 /* transport layer: kex specific messages, can be reused */ 96 97 #define SSH2_MSG_KEXDH_INIT 30 98 #define SSH2_MSG_KEXDH_REPLY 31 99 100 /* dh-group-exchange */ 101 #define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD 30 102 #define SSH2_MSG_KEX_DH_GEX_GROUP 31 103 #define SSH2_MSG_KEX_DH_GEX_INIT 32 104 #define SSH2_MSG_KEX_DH_GEX_REPLY 33 105 #define SSH2_MSG_KEX_DH_GEX_REQUEST 34 106 107 /* ecdh */ 108 #define SSH2_MSG_KEX_ECDH_INIT 30 109 #define SSH2_MSG_KEX_ECDH_REPLY 31 110 111 /* transport layer: OpenSSH extensions */ 112 #define SSH2_MSG_PING 192 113 #define SSH2_MSG_PONG 193 114 115 /* user authentication: generic */ 116 117 #define SSH2_MSG_USERAUTH_REQUEST 50 118 #define SSH2_MSG_USERAUTH_FAILURE 51 119 #define SSH2_MSG_USERAUTH_SUCCESS 52 120 #define SSH2_MSG_USERAUTH_BANNER 53 121 122 /* user authentication: method specific, can be reused */ 123 124 #define SSH2_MSG_USERAUTH_PK_OK 60 125 #define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 126 #define SSH2_MSG_USERAUTH_INFO_REQUEST 60 127 #define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 128 129 /* connection protocol: generic */ 130 131 #define SSH2_MSG_GLOBAL_REQUEST 80 132 #define SSH2_MSG_REQUEST_SUCCESS 81 133 #define SSH2_MSG_REQUEST_FAILURE 82 134 135 /* channel related messages */ 136 137 #define SSH2_MSG_CHANNEL_OPEN 90 138 #define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 139 #define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 140 #define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 141 #define SSH2_MSG_CHANNEL_DATA 94 142 #define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 143 #define SSH2_MSG_CHANNEL_EOF 96 144 #define SSH2_MSG_CHANNEL_CLOSE 97 145 #define SSH2_MSG_CHANNEL_REQUEST 98 146 #define SSH2_MSG_CHANNEL_SUCCESS 99 147 #define SSH2_MSG_CHANNEL_FAILURE 100 148 149 /* disconnect reason code */ 150 151 #define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 152 #define SSH2_DISCONNECT_PROTOCOL_ERROR 2 153 #define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 154 #define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 155 #define SSH2_DISCONNECT_RESERVED 4 156 #define SSH2_DISCONNECT_MAC_ERROR 5 157 #define SSH2_DISCONNECT_COMPRESSION_ERROR 6 158 #define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE 7 159 #define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 160 #define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 161 #define SSH2_DISCONNECT_CONNECTION_LOST 10 162 #define SSH2_DISCONNECT_BY_APPLICATION 11 163 #define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS 12 164 #define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER 13 165 #define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 166 #define SSH2_DISCONNECT_ILLEGAL_USER_NAME 15 167 168 /* misc */ 169 170 #define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED 1 171 #define SSH2_OPEN_CONNECT_FAILED 2 172 #define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE 3 173 #define SSH2_OPEN_RESOURCE_SHORTAGE 4 174 175 #define SSH2_EXTENDED_DATA_STDERR 1 176 177 /* Certificate types for OpenSSH certificate keys extension */ 178 #define SSH2_CERT_TYPE_USER 1 179 #define SSH2_CERT_TYPE_HOST 2 180