draft-ietf-secsh-architecture-10.txt   draft-ietf-secsh-architecture-11.txt 
Network Working Group T. Ylonen Network Working Group T. Ylonen
Internet-Draft T. Kivinen Internet-Draft T. Kivinen
Expires: May 10, 2002 SSH Communications Security Corp Expires: May 20, 2002 SSH Communications Security Corp
M. Saarinen M. Saarinen
University of Jyvaskyla University of Jyvaskyla
T. Rinne T. Rinne
S. Lehtinen S. Lehtinen
SSH Communications Security Corp SSH Communications Security Corp
November 9, 2001 November 19, 2001
SSH Protocol Architecture SSH Protocol Architecture
draft-ietf-secsh-architecture-10.txt draft-ietf-secsh-architecture-11.txt
Status of this Memo Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
skipping to change at page 1, line 37 skipping to change at page 1, line 37
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on May 10, 2002. This Internet-Draft will expire on May 20, 2002.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2001). All Rights Reserved. Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract Abstract
SSH is a protocol for secure remote login and other secure network SSH is a protocol for secure remote login and other secure network
services over an insecure network. This document describes the services over an insecure network. This document describes the
architecture of the SSH protocol, as well as the notation and architecture of the SSH protocol, as well as the notation and
skipping to change at page 9, line 21 skipping to change at page 9, line 21
Represents multiple precision integers in two's complement format, Represents multiple precision integers in two's complement format,
stored as a string, 8 bits per byte, MSB first. Negative numbers stored as a string, 8 bits per byte, MSB first. Negative numbers
have the value 1 as the most significant bit of the first byte of have the value 1 as the most significant bit of the first byte of
the data partition. If the most significant bit would be set for the data partition. If the most significant bit would be set for
a positive number, the number MUST be preceded by a zero byte. a positive number, the number MUST be preceded by a zero byte.
Unnecessary leading bytes with the value 0 or 255 MUST NOT be Unnecessary leading bytes with the value 0 or 255 MUST NOT be
included. The value zero MUST be stored as a string with zero included. The value zero MUST be stored as a string with zero
bytes of data. bytes of data.
By convention, a number that is used in modular computations in By convention, a number that is used in modular computations in
Z_n SHOULD be represented in the range 0 &amp;lt= x &lt n. Z_n SHOULD be represented in the range 0 &lt;= x < n.
Examples: Examples:
value (hex) representation (hex) value (hex) representation (hex)
--------------------------------------------------------------- ---------------------------------------------------------------
0 00 00 00 00 0 00 00 00 00
9a378f9b2e332a7 00 00 00 08 09 a3 78 f9 b2 e3 32 a7 9a378f9b2e332a7 00 00 00 08 09 a3 78 f9 b2 e3 32 a7
80 00 00 00 02 00 80 80 00 00 00 02 00 80
-1234 00 00 00 02 ed cc -1234 00 00 00 02 ed cc
-deadbeef 00 00 00 05 ff 21 52 41 11 -deadbeef 00 00 00 05 ff 21 52 41 11
skipping to change at page 13, line 29 skipping to change at page 13, line 29
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2279] Yergeau, F., "UTF-8, a transformation format of ISO [RFC2279] Yergeau, F., "UTF-8, a transformation format of ISO
10646", RFC 2279, January 1998. 10646", RFC 2279, January 1998.
[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing [RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing
an IANA Considerations Section in RFCs", BCP 26, RFC an IANA Considerations Section in RFCs", BCP 26, RFC
2434, October 1998. 2434, October 1998.
[SSH-ARCH] Ylonen, T., "SSH Protocol Architecture", I-D draft- [SSH-ARCH] Ylonen, T., "SSH Protocol Architecture", I-D draft-
ietf-architecture-09.txt, July 2001. ietf-architecture-11.txt, July 2001.
[SSH-TRANS] Ylonen, T., "SSH Transport Layer Protocol", I-D [SSH-TRANS] Ylonen, T., "SSH Transport Layer Protocol", I-D
draft-ietf-transport-11.txt, July 2001. draft-ietf-transport-11.txt, July 2001.
[SSH-USERAUTH] Ylonen, T., "SSH Authentication Protocol", I-D draft- [SSH-USERAUTH] Ylonen, T., "SSH Authentication Protocol", I-D draft-
ietf-userauth-11.txt, July 2001. ietf-userauth-13.txt, July 2001.
[SSH-CONNECT] Ylonen, T., "SSH Connection Protocol", I-D draft- [SSH-CONNECT] Ylonen, T., "SSH Connection Protocol", I-D draft-
ietf-connect-11.txt, July 2001. ietf-connect-13.txt, July 2001.
Authors' Addresses Authors' Addresses
Tatu Ylonen Tatu Ylonen
SSH Communications Security Corp SSH Communications Security Corp
Fredrikinkatu 42 Fredrikinkatu 42
HELSINKI FIN-00100 HELSINKI FIN-00100
Finland Finland
EMail: ylo@ssh.com EMail: ylo@ssh.com
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