crypto/openssh/ssh2.h

   1 /* $OpenBSD: ssh2.h,v 1.19 2020/11/19 23:05:05 dtucker 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
  89 /* transport layer: alg negotiation */
  90
  91 #define SSH2_MSG_KEXINIT                                20
  92 #define SSH2_MSG_NEWKEYS                                21
  93
  94 /* transport layer: kex specific messages, can be reused */
  95
  96 #define SSH2_MSG_KEXDH_INIT                             30
  97 #define SSH2_MSG_KEXDH_REPLY                            31
  98
  99 /* dh-group-exchange */
 100 #define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD                 30
 101 #define SSH2_MSG_KEX_DH_GEX_GROUP                       31
 102 #define SSH2_MSG_KEX_DH_GEX_INIT                        32
 103 #define SSH2_MSG_KEX_DH_GEX_REPLY                       33
 104 #define SSH2_MSG_KEX_DH_GEX_REQUEST                     34
 105
 106 /* ecdh */
 107 #define SSH2_MSG_KEX_ECDH_INIT                          30
 108 #define SSH2_MSG_KEX_ECDH_REPLY                         31
 109
 110 /* user authentication: generic */
 111
 112 #define SSH2_MSG_USERAUTH_REQUEST                       50
 113 #define SSH2_MSG_USERAUTH_FAILURE                       51
 114 #define SSH2_MSG_USERAUTH_SUCCESS                       52
 115 #define SSH2_MSG_USERAUTH_BANNER                        53
 116
 117 /* user authentication: method specific, can be reused */
 118
 119 #define SSH2_MSG_USERAUTH_PK_OK                         60
 120 #define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ              60
 121 #define SSH2_MSG_USERAUTH_INFO_REQUEST                  60
 122 #define SSH2_MSG_USERAUTH_INFO_RESPONSE                 61
 123
 124 /* connection protocol: generic */
 125
 126 #define SSH2_MSG_GLOBAL_REQUEST                         80
 127 #define SSH2_MSG_REQUEST_SUCCESS                        81
 128 #define SSH2_MSG_REQUEST_FAILURE                        82
 129
 130 /* channel related messages */
 131
 132 #define SSH2_MSG_CHANNEL_OPEN                           90
 133 #define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION              91
 134 #define SSH2_MSG_CHANNEL_OPEN_FAILURE                   92
 135 #define SSH2_MSG_CHANNEL_WINDOW_ADJUST                  93
 136 #define SSH2_MSG_CHANNEL_DATA                           94
 137 #define SSH2_MSG_CHANNEL_EXTENDED_DATA                  95
 138 #define SSH2_MSG_CHANNEL_EOF                            96
 139 #define SSH2_MSG_CHANNEL_CLOSE                          97
 140 #define SSH2_MSG_CHANNEL_REQUEST                        98
 141 #define SSH2_MSG_CHANNEL_SUCCESS                        99
 142 #define SSH2_MSG_CHANNEL_FAILURE                        100
 143
 144 /* disconnect reason code */
 145
 146 #define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT     1
 147 #define SSH2_DISCONNECT_PROTOCOL_ERROR                  2
 148 #define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED             3
 149 #define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED      4
 150 #define SSH2_DISCONNECT_RESERVED                        4
 151 #define SSH2_DISCONNECT_MAC_ERROR                       5
 152 #define SSH2_DISCONNECT_COMPRESSION_ERROR               6
 153 #define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE           7
 154 #define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED  8
 155 #define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE         9
 156 #define SSH2_DISCONNECT_CONNECTION_LOST                 10
 157 #define SSH2_DISCONNECT_BY_APPLICATION                  11
 158 #define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS            12
 159 #define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER          13
 160 #define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE  14
 161 #define SSH2_DISCONNECT_ILLEGAL_USER_NAME               15
 162
 163 /* misc */
 164
 165 #define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED           1
 166 #define SSH2_OPEN_CONNECT_FAILED                        2
 167 #define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE                  3
 168 #define SSH2_OPEN_RESOURCE_SHORTAGE                     4
 169
 170 #define SSH2_EXTENDED_DATA_STDERR                       1
 171
 172 /* Certificate types for OpenSSH certificate keys extension */
 173 #define SSH2_CERT_TYPE_USER                             1
 174 #define SSH2_CERT_TYPE_HOST                             2