Network Working Group S. Lehtinen
Internet-Draft SSH Communications Security Corp
Expires: January 12, 2004 D. Moffat
Sun Microsystems
July 14, 2003
SSH Protocol Assigned Numbers
draft-ietf-secsh-assignednumbers-02.txt
Status of this Memo
This document is an Internet-Draft and is in full conformance with
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Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This document defines the initial state of the IANA assigned
numbers for the SSH protocol as defined in [SSH-ARCH], [SSH-
TRANS], [SSH-CONNECT], [SSH-USERAUTH]. This document does not
define any new protocols or any number ranges not already defined
in the above referenced documents. It is intended only for
initalization of the IANA databases referenced in those documents.
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Table of Contents
1. Message Numbers . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Disconnect Codes . . . . . . . . . . . . . . . . . . . . . . 4
2. Service Names . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Authentication Method Names . . . . . . . . . . . . . . . . 5
2.2 Connection Protocol Assigned Names . . . . . . . . . . . . . 6
2.2.1 Connection Protocol Channel Types . . . . . . . . . . . . . 6
2.2.2 Connection Protocol Global Request Names . . . . . . . . . . 6
2.2.3 Connection Protocol Channel Request Names . . . . . . . . . 6
3. Key Exchange Method Names . . . . . . . . . . . . . . . . . 7
4. Assigned Algorithm Names . . . . . . . . . . . . . . . . . . 7
4.1 Encryption Algorithm Names . . . . . . . . . . . . . . . . . 7
4.2 MAC Algorithm Names . . . . . . . . . . . . . . . . . . . . 8
4.3 Public Key Algorithm Names . . . . . . . . . . . . . . . . . 8
References . . . . . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 9
Full Copyright Statement . . . . . . . . . . . . . . . . . . 10
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1. Message Numbers
The Message Number is an 8-bit value, which describes the payload
of a packet.
Protocol packets have message numbers in the range 1 to 255.
These numbers have been allocated as follows in [SSH-ARCH]:
Transport layer protocol:
1 to 19 Transport layer generic (e.g. disconnect, ignore, debug, etc.)
20 to 29 Algorithm negotiation
30 to 49 Key exchange method specific (numbers can be reused for
different authentication methods)
User authentication protocol:
50 to 59 User authentication generic
60 to 79 User authentication method specific (numbers can be
reused for different authentication methods)
Connection protocol:
80 to 89 Connection protocol generic
90 to 127 Channel related messages
Reserved for client protocols:
128 to 191 Reserved
Local extensions:
192 to 255 Local extensions
Requests for assignments of new message numbers must be
accompanied by an RFC which describes the new packet type. If the
RFC is not on the standards-track (i.e. it is an informational or
experimental RFC), it must be explicitly reviewed and approved by
the IESG before the RFC is published and the message number is
assigned.
Message ID Value Reference
----------- ----- ---------
SSH_MSG_DISCONNECT 1 [SSH-TRANS]
SSH_MSG_IGNORE 2 [SSH-TRANS]
SSH_MSG_UNIMPLEMENTED 3 [SSH-TRANS]
SSH_MSG_DEBUG 4 [SSH-TRANS]
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SSH_MSG_SERVICE_REQUEST 5 [SSH-TRANS]
SSH_MSG_SERVICE_ACCEPT 6 [SSH-TRANS]
SSH_MSG_KEXINIT 20 [SSH-TRANS]
SSH_MSG_NEWKEYS 21 [SSH-TRANS]
SSH_MSG_KEXDH_INIT 30 [SSH-TRANS]
SSH_MSG_KEXDH_REPLY 31 [SSH-TRANS]
SSH_MSG_USERAUTH_REQUEST 50 [SSH-USERAUTH]
SSH_MSG_USERAUTH_FAILURE 51 [SSH-USERAUTH]
SSH_MSG_USERAUTH_SUCCESS 52 [SSH-USERAUTH]
SSH_MSG_USERAUTH_BANNER 53 [SSH-USERAUTH]
SSH_MSG_USERAUTH_PK_OK 60 [SSH-USERAUTH]
SSH_MSG_GLOBAL_REQUEST 80 [SSH-CONNECT]
SSH_MSG_REQUEST_SUCCESS 81 [SSH-CONNECT]
SSH_MSG_REQUEST_FAILURE 82 [SSH-CONNECT]
SSH_MSG_CHANNEL_OPEN 90 [SSH-CONNECT]
SSH_MSG_CHANNEL_OPEN_CONFIRMATION 91 [SSH-CONNECT]
SSH_MSG_CHANNEL_OPEN_FAILURE 92 [SSH-CONNECT]
SSH_MSG_CHANNEL_WINDOW_ADJUST 93 [SSH-CONNECT]
SSH_MSG_CHANNEL_DATA 94 [SSH-CONNECT]
SSH_MSG_CHANNEL_EXTENDED_DATA 95 [SSH-CONNECT]
SSH_MSG_CHANNEL_EOF 96 [SSH-CONNECT]
SSH_MSG_CHANNEL_CLOSE 97 [SSH-CONNECT]
SSH_MSG_CHANNEL_REQUEST 98 [SSH-CONNECT]
SSH_MSG_CHANNEL_SUCCESS 99 [SSH-CONNECT]
SSH_MSG_CHANNEL_FAILURE 100 [SSH-CONNECT]
1.1 Disconnect Codes
The Disconnect code is an 8-bit value, which describes the
disconnect reason. Requests for assignments of new disconnect
codes must be accompanied by an RFC which describes the new
disconnect reason code.
Disconnect code Value Reference
---------------- ----- ---------
SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 [SSH-TRANS]
SSH_DISCONNECT_PROTOCOL_ERROR 2 [SSH-TRANS]
SSH_DISCONNECT_KEY_EXCHANGE_FAILED 3 [SSH-TRANS]
SSH_DISCONNECT_RESERVED 4 [SSH-TRANS]
SSH_DISCONNECT_MAC_ERROR 5 [SSH-TRANS]
SSH_DISCONNECT_COMPRESSION_ERROR 6 [SSH-TRANS]
SSH_DISCONNECT_SERVICE_NOT_AVAILABLE 7 [SSH-TRANS]
SSH_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 [SSH-TRANS]
SSH_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 [SSH-TRANS]
SSH_DISCONNECT_CONNECTION_LOST 10 [SSH-TRANS]
SSH_DISCONNECT_BY_APPLICATION 11 [SSH-TRANS]
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SSH_DISCONNECT_TOO_MANY_CONNECTIONS 12 [SSH-TRANS]
SSH_DISCONNECT_AUTH_CANCELLED_BY_USER 13 [SSH-TRANS]
SSH_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 [SSH-TRANS]
SSH_DISCONNECT_ILLEGAL_USER_NAME 15 [SSH-TRANS]
2. Service Names
The Service Name is used to describe a protocol layer. These
names MUST be printable US-ASCII strings, and MUST NOT contain the
characters at-sign ('@'), comma (','), or whitespace or control
characters (ASCII codes 32 or less). Names are case-sensitive,
and MUST NOT be longer than 64 characters.
Requests for assignments of new service names must be accompanied
by an RFC which describes the interpretation for the service name.
If the RFC is not on the standards-track (i.e. it is an
informational or experimental RFC), it must be explicitly reviewed
and approved by the IESG before the RFC is published and the
service name is assigned.
Service name Reference
------------- ---------
ssh-userauth [SSH-USERAUTH]
ssh-connection [SSH-CONNECT]
2.1 Authentication Method Names
The Authentication Method Name is used to describe an
authentication method for the "ssh-userauth" service [SSH-
USERAUTH]. These names MUST be printable US-ASCII strings, and
MUST NOT contain the characters at-sign ('@'), comma (','), or
whitespace or control characters (ASCII codes 32 or less). Names
are case-sensitive, and MUST NOT be longer than 64 characters.
Requests for assignments of new authentication method names must
be accompanied by an RFC which describes the interpretation for
the authentication method.
Method name Reference
------------ ---------
publickey [SSH-USERAUTH, Section 4]
password [SSH-USERAUTH, Section 5]
hostbased [SSH-USERAUTH, Section 6]
none [SSH-USERAUTH, Section 2.3]
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2.2 Connection Protocol Assigned Names
The following request and type names MUST be printable US-ASCII
strings, and MUST NOT contain the characters at-sign ('@'), comma
(','), or whitespace or control characters (ASCII codes 32 or
less). Names are case-sensitive, and MUST NOT be longer than 64
characters.
Requests for assignments of new assigned names must be accompanied
by an RFC which describes the interpretation for the type or
request.
2.2.1 Connection Protocol Channel Types
Channel type Reference
------------ ---------
session [SSH-CONNECT, Section 4.1]
x11 [SSH-CONNECT, Section 4.3.2]
forwarded-tcpip [SSH-CONNECT, Section 5.2]
direct-tcpip [SSH-CONNECT, Section 5.2]
2.2.2 Connection Protocol Global Request Names
Request type Reference
------------ ---------
tcpip-forward [SSH-CONNECT, Section 5.1]
cancel-tcpip-forward [SSH-CONNECT, Section 5.1]
2.2.3 Connection Protocol Channel Request Names
Request type Reference
------------ ---------
pty-req [SSH-CONNECT, Section 4.2]
x11-req [SSH-CONNECT, Section 4.3.1]
env [SSH-CONNECT, Section 4.4]
shell [SSH-CONNECT, Section 4.5]
exec [SSH-CONNECT, Section 4.5]
subsystem [SSH-CONNECT, Section 4.5]
window-change [SSH-CONNECT, Section 4.7]
xon-xoff [SSH-CONNECT, Section 4.8]
signal [SSH-CONNECT, Section 4.9]
exit-status [SSH-CONNECT, Section 4.10]
exit-signal [SSH-CONNECT, Section 4.10]
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3. Key Exchange Method Names
The Key Exchange Method Name describes a key-exchange method for
the protocol [SSH-TRANS]. The names MUST be printable US-ASCII
strings, and MUST NOT contain the characters at-sign ('@'), comma
(','), or whitespace or control characters (ASCII codes 32 or
less). Names are case-sensitive, and MUST NOT be longer than 64
characters.
Requests for assignment of new key-exchange method names must be
accompanied by a reference to a standards-track or Informational
RFC which describes this method.
Method name Reference
------------ ---------
diffie-hellman-group1-sha1 [SSH-TRANS, Section 4.5]
4. Assigned Algorithm Names
The following identifiers (names) MUST be printable US-ASCII
strings, and MUST NOT contain the characters at-sign ('@'), comma
(','), or whitespace or control characters (ASCII codes 32 or
less). Names are case-sensitive, and MUST NOT be longer than 64
characters.
Requests for assignment of new algorithm names must be accompanied
by a reference to a standards-track or Informational RFC or a
reference to published cryptographic literature which describes
the algorithm.
4.1 Encryption Algorithm Names
Cipher name Reference
------------ ---------
3des-cbc [SSH-TRANS, Section 4.3]
blowfish-cbc [SSH-TRANS, Section 4.3]
twofish256-cbc [SSH-TRANS, Section 4.3]
twofish-cbc [SSH-TRANS, Section 4.3]
twofish192-cbc [SSH-TRANS, Section 4.3]
twofish128-cbc [SSH-TRANS, Section 4.3]
aes256-cbc [SSH-TRANS, Section 4.3]
aes192-cbc [SSH-TRANS, Section 4.3]
aes128-cbc [SSH-TRANS, Section 4.3]
serpent256-cbc [SSH-TRANS, Section 4.3]
serpent192-cbc [SSH-TRANS, Section 4.3]
serpent128-cbc [SSH-TRANS, Section 4.3]
arcfour [SSH-TRANS, Section 4.3]
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idea-cbc [SSH-TRANS, Section 4.3]
cast128-cbc [SSH-TRANS, Section 4.3]
none [SSH-TRANS, Section 4.3]
des-cbc [FIPS-46-3] HISTORIC; See page 4 of [FIPS 46-3]
4.2 MAC Algorithm Names
MAC name Reference
--------- ---------
hmac-sha1 [SSH-TRANS, Section 4.4]
hmac-sha1-96 [SSH-TRANS, Section 4.4]
hmac-md5 [SSH-TRANS, Section 4.4]
hmac-md5-96 [SSH-TRANS, Section 4.4]
none [SSH-TRANS, Section 4.4]
4.3 Public Key Algorithm Names
Algorithm name Reference
--------------- ---------
ssh-dss [SSH-TRANS, Section 4.6]
ssh-rsa [SSH-TRANS, Section 4.6]
x509v3-sign-rsa [SSH-TRANS, Section 4.6]
x509v3-sign-dss [SSH-TRANS, Section 4.6]
spki-sign-rsa [SSH-TRANS, Section 4.6]
spki-sign-dss [SSH-TRANS, Section 4.6]
pgp-sign-rsa [SSH-TRANS, Section 4.6]
pgp-sign-dss [SSH-TRANS, Section 4.6]
References
[SSH-ARCH] Ylonen, T., "SSH Protocol Architecture", I-D
draft-ietf-architecture-14.txt, July 2003.
[SSH-TRANS] Ylonen, T., "SSH Transport Layer Protocol", I-D
draft-ietf-transport-16.txt, July 2003.
[SSH-USERAUTH] Ylonen, T., "SSH Authentication Protocol", I-D
draft-ietf-userauth-17.txt, July 2003.
[SSH-CONNECT] Ylonen, T., "SSH Connection Protocol", I-D draft-
ietf-connect-17.txt, July 2003.
[SSH-NUMBERS] Lehtinen, S. and D. Moffat, "SSH Protocol Assigned
Numbers", I-D draft-ietf-secsh-assignednumbers-
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03.txt, July 2003.
[FIPS-46-3] U.S. Dept. of Commerce, ., "FIPS PUB 46-3, Data
Encryption Standard (DES)", October 1999.
Authors' Addresses
Sami Lehtinen
SSH Communications Security Corp
Fredrikinkatu 42
HELSINKI FIN-00100
Finland
EMail: sjl@ssh.com
Darren J Moffat
Sun Microsystems
901 San Antonio Road
Palo Alto 94303
USA
EMail: Darren.Moffat@Sun.COM
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