1 /* $NetBSD: ssh2.h,v 1.15 2023/12/20 17:15:21 christos Exp $ */ 2 /* $OpenBSD: ssh2.h,v 1.22 2023/10/10 03:57:45 djm Exp $ */ 3 4 /* 5 * Copyright (c) 2000 Markus Friedl. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * RFC4251: 30 * 31 * Transport layer protocol: 32 * 33 * 1-19 Transport layer generic (e.g. disconnect, ignore, debug, 34 * etc) 35 * 20-29 Algorithm negotiation 36 * 30-49 Key exchange method specific (numbers can be reused for 37 * different authentication methods) 38 * 39 * User authentication protocol: 40 * 41 * 50-59 User authentication generic 42 * 60-79 User authentication method specific (numbers can be reused 43 * for different authentication methods) 44 * 45 * Connection protocol: 46 * 47 * 80-89 Connection protocol generic 48 * 90-127 Channel related messages 49 * 50 * Reserved for client protocols: 51 * 52 * 128-191 Reserved 53 * 54 * Local extensions: 55 * 56 * 192-255 Local extensions 57 * 248-255 Local extensions (OpenSSH will never use numbers in this range) 58 */ 59 60 /* special marker for no message */ 61 62 #define SSH_MSG_NONE 0 63 64 /* ranges */ 65 66 #define SSH2_MSG_TRANSPORT_MIN 1 67 #define SSH2_MSG_TRANSPORT_MAX 49 68 #define SSH2_MSG_USERAUTH_MIN 50 69 #define SSH2_MSG_USERAUTH_MAX 79 70 #define SSH2_MSG_USERAUTH_PER_METHOD_MIN 60 71 #define SSH2_MSG_USERAUTH_PER_METHOD_MAX SSH2_MSG_USERAUTH_MAX 72 #define SSH2_MSG_CONNECTION_MIN 80 73 #define SSH2_MSG_CONNECTION_MAX 127 74 #define SSH2_MSG_RESERVED_MIN 128 75 #define SSH2_MSG_RESERVED_MAX 191 76 #define SSH2_MSG_LOCAL_MIN 192 77 #define SSH2_MSG_LOCAL_MAX 255 78 #define SSH2_MSG_MIN 1 79 #define SSH2_MSG_MAX 255 80 81 /* transport layer: generic */ 82 83 #define SSH2_MSG_DISCONNECT 1 84 #define SSH2_MSG_IGNORE 2 85 #define SSH2_MSG_UNIMPLEMENTED 3 86 #define SSH2_MSG_DEBUG 4 87 #define SSH2_MSG_SERVICE_REQUEST 5 88 #define SSH2_MSG_SERVICE_ACCEPT 6 89 #define SSH2_MSG_EXT_INFO 7 90 #define SSH2_MSG_NEWCOMPRESS 8 91 92 /* transport layer: alg negotiation */ 93 94 #define SSH2_MSG_KEXINIT 20 95 #define SSH2_MSG_NEWKEYS 21 96 97 /* transport layer: kex specific messages, can be reused */ 98 99 #define SSH2_MSG_KEXDH_INIT 30 100 #define SSH2_MSG_KEXDH_REPLY 31 101 102 /* dh-group-exchange */ 103 #define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD 30 104 #define SSH2_MSG_KEX_DH_GEX_GROUP 31 105 #define SSH2_MSG_KEX_DH_GEX_INIT 32 106 #define SSH2_MSG_KEX_DH_GEX_REPLY 33 107 #define SSH2_MSG_KEX_DH_GEX_REQUEST 34 108 109 /* ecdh */ 110 #define SSH2_MSG_KEX_ECDH_INIT 30 111 #define SSH2_MSG_KEX_ECDH_REPLY 31 112 113 /* transport layer: OpenSSH extensions */ 114 #define SSH2_MSG_PING 192 115 #define SSH2_MSG_PONG 193 116 117 /* user authentication: generic */ 118 119 #define SSH2_MSG_USERAUTH_REQUEST 50 120 #define SSH2_MSG_USERAUTH_FAILURE 51 121 #define SSH2_MSG_USERAUTH_SUCCESS 52 122 #define SSH2_MSG_USERAUTH_BANNER 53 123 124 /* user authentication: method specific, can be reused */ 125 126 #define SSH2_MSG_USERAUTH_PK_OK 60 127 #define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 128 #define SSH2_MSG_USERAUTH_INFO_REQUEST 60 129 #define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 130 131 /* connection protocol: generic */ 132 133 #define SSH2_MSG_GLOBAL_REQUEST 80 134 #define SSH2_MSG_REQUEST_SUCCESS 81 135 #define SSH2_MSG_REQUEST_FAILURE 82 136 137 /* channel related messages */ 138 139 #define SSH2_MSG_CHANNEL_OPEN 90 140 #define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 141 #define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 142 #define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 143 #define SSH2_MSG_CHANNEL_DATA 94 144 #define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 145 #define SSH2_MSG_CHANNEL_EOF 96 146 #define SSH2_MSG_CHANNEL_CLOSE 97 147 #define SSH2_MSG_CHANNEL_REQUEST 98 148 #define SSH2_MSG_CHANNEL_SUCCESS 99 149 #define SSH2_MSG_CHANNEL_FAILURE 100 150 151 /* disconnect reason code */ 152 153 #define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 154 #define SSH2_DISCONNECT_PROTOCOL_ERROR 2 155 #define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 156 #define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 157 #define SSH2_DISCONNECT_RESERVED 4 158 #define SSH2_DISCONNECT_MAC_ERROR 5 159 #define SSH2_DISCONNECT_COMPRESSION_ERROR 6 160 #define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE 7 161 #define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 162 #define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 163 #define SSH2_DISCONNECT_CONNECTION_LOST 10 164 #define SSH2_DISCONNECT_BY_APPLICATION 11 165 #define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS 12 166 #define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER 13 167 #define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 168 #define SSH2_DISCONNECT_ILLEGAL_USER_NAME 15 169 170 /* misc */ 171 172 #define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED 1 173 #define SSH2_OPEN_CONNECT_FAILED 2 174 #define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE 3 175 #define SSH2_OPEN_RESOURCE_SHORTAGE 4 176 177 #define SSH2_EXTENDED_DATA_STDERR 1 178 179 /* Certificate types for OpenSSH certificate keys extension */ 180 #define SSH2_CERT_TYPE_USER 1 181 #define SSH2_CERT_TYPE_HOST 2 182