1/* $OpenBSD: ssh2.h,v 1.22 2023/10/10 03:57:45 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 * 248-255 Local extensions (OpenSSH will never use numbers in this range) 57 */ 58 59/* special marker for no message */ 60 61#define SSH_MSG_NONE 0 62 63/* ranges */ 64 65#define SSH2_MSG_TRANSPORT_MIN 1 66#define SSH2_MSG_TRANSPORT_MAX 49 67#define SSH2_MSG_USERAUTH_MIN 50 68#define SSH2_MSG_USERAUTH_MAX 79 69#define SSH2_MSG_USERAUTH_PER_METHOD_MIN 60 70#define SSH2_MSG_USERAUTH_PER_METHOD_MAX SSH2_MSG_USERAUTH_MAX 71#define SSH2_MSG_CONNECTION_MIN 80 72#define SSH2_MSG_CONNECTION_MAX 127 73#define SSH2_MSG_RESERVED_MIN 128 74#define SSH2_MSG_RESERVED_MAX 191 75#define SSH2_MSG_LOCAL_MIN 192 76#define SSH2_MSG_LOCAL_MAX 255 77#define SSH2_MSG_MIN 1 78#define SSH2_MSG_MAX 255 79 80/* transport layer: generic */ 81 82#define SSH2_MSG_DISCONNECT 1 83#define SSH2_MSG_IGNORE 2 84#define SSH2_MSG_UNIMPLEMENTED 3 85#define SSH2_MSG_DEBUG 4 86#define SSH2_MSG_SERVICE_REQUEST 5 87#define SSH2_MSG_SERVICE_ACCEPT 6 88#define SSH2_MSG_EXT_INFO 7 89#define SSH2_MSG_NEWCOMPRESS 8 90 91/* transport layer: alg negotiation */ 92 93#define SSH2_MSG_KEXINIT 20 94#define SSH2_MSG_NEWKEYS 21 95 96/* transport layer: kex specific messages, can be reused */ 97 98#define SSH2_MSG_KEXDH_INIT 30 99#define SSH2_MSG_KEXDH_REPLY 31 100 101/* dh-group-exchange */ 102#define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD 30 103#define SSH2_MSG_KEX_DH_GEX_GROUP 31 104#define SSH2_MSG_KEX_DH_GEX_INIT 32 105#define SSH2_MSG_KEX_DH_GEX_REPLY 33 106#define SSH2_MSG_KEX_DH_GEX_REQUEST 34 107 108/* ecdh */ 109#define SSH2_MSG_KEX_ECDH_INIT 30 110#define SSH2_MSG_KEX_ECDH_REPLY 31 111 112/* transport layer: OpenSSH extensions */ 113#define SSH2_MSG_PING 192 114#define SSH2_MSG_PONG 193 115 116/* user authentication: generic */ 117 118#define SSH2_MSG_USERAUTH_REQUEST 50 119#define SSH2_MSG_USERAUTH_FAILURE 51 120#define SSH2_MSG_USERAUTH_SUCCESS 52 121#define SSH2_MSG_USERAUTH_BANNER 53 122 123/* user authentication: method specific, can be reused */ 124 125#define SSH2_MSG_USERAUTH_PK_OK 60 126#define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 127#define SSH2_MSG_USERAUTH_INFO_REQUEST 60 128#define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 129 130/* connection protocol: generic */ 131 132#define SSH2_MSG_GLOBAL_REQUEST 80 133#define SSH2_MSG_REQUEST_SUCCESS 81 134#define SSH2_MSG_REQUEST_FAILURE 82 135 136/* channel related messages */ 137 138#define SSH2_MSG_CHANNEL_OPEN 90 139#define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 140#define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 141#define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 142#define SSH2_MSG_CHANNEL_DATA 94 143#define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 144#define SSH2_MSG_CHANNEL_EOF 96 145#define SSH2_MSG_CHANNEL_CLOSE 97 146#define SSH2_MSG_CHANNEL_REQUEST 98 147#define SSH2_MSG_CHANNEL_SUCCESS 99 148#define SSH2_MSG_CHANNEL_FAILURE 100 149 150/* disconnect reason code */ 151 152#define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 153#define SSH2_DISCONNECT_PROTOCOL_ERROR 2 154#define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 155#define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 156#define SSH2_DISCONNECT_RESERVED 4 157#define SSH2_DISCONNECT_MAC_ERROR 5 158#define SSH2_DISCONNECT_COMPRESSION_ERROR 6 159#define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE 7 160#define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 161#define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 162#define SSH2_DISCONNECT_CONNECTION_LOST 10 163#define SSH2_DISCONNECT_BY_APPLICATION 11 164#define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS 12 165#define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER 13 166#define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 167#define SSH2_DISCONNECT_ILLEGAL_USER_NAME 15 168 169/* misc */ 170 171#define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED 1 172#define SSH2_OPEN_CONNECT_FAILED 2 173#define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE 3 174#define SSH2_OPEN_RESOURCE_SHORTAGE 4 175 176#define SSH2_EXTENDED_DATA_STDERR 1 177 178/* Certificate types for OpenSSH certificate keys extension */ 179#define SSH2_CERT_TYPE_USER 1 180#define SSH2_CERT_TYPE_HOST 2 181