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Telnet Authentication: SPX (RFC1412)

IP.com Disclosure Number: IPCOM000002238D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 3 page(s) / 6K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Alagappan: AUTHOR

Abstract

Status of this Memo

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 46% of the total text.

Network Working Group K. Alagappan

Request for Comments: 1412 Digital Equipment Corporation

January 1993

Telnet Authentication: SPX

Status of this Memo

This memo defines an Experimental Protocol for the Internet

community. Discussion and suggestions for improvement are requested.

Please refer to the current edition of the "IAB Official Protocol

Standards" for the standardization state and status of this protocol.

Distribution of this memo is unlimited.

1. Command Names and Codes

Authentication Types

SPX 3

Suboption Commands

AUTH 0

REJECT 1

ACCEPT 2

2. Command Meanings

IAC SB AUTHENTICATION IS AUTH

IAC SE

This is used to pass the SPX authentication token to the remote

side of the connection. (A document which describes the

authentication token syntax is forthcoming.) The first octet of

the value is SPX. The second octet is

a modifier to the SPX authentication type.

IAC SB AUTHENTICATION REPLY ACCEPT

IAC SE

This command indicates that the authentication was successful.

After an SPX authentication exchange, both sides have securely

established a random 8-byte key to be used as the default key for

the ENCRYPTION option. If the AUTH_HOW_MUTUAL bit is set in the

second octet of the authentication-type-pair, the sender includes

the mutual response bytes. The receiver of the ACCEPT command

compares the "mutual response" with its expected mutual response.

(A document which describes the mutual response syntax is forth

coming.) If the AUTH_HOW_ONE_WAY bit is set in the second octet

of the authentication-type-pair, the sender includes zero bytes of

mutual response.

IAC SB AUTHENTICATION REPLY REJECT

IAC SE

This command indicates that the authentication was not successful,

and if there is any more data in the sub-option, it is an ASCII

text message of the reason for the rejection.

3. Implementation Rules

Every command after the first AUTHENTICATION IS must carry the same

set of modifiers (e.g., CLIENT|MUTUAL) for subsequent AUTHENTICATION

IS and AUTHENTICATION REPLY commands.

If the second octet of the authentication-type-pair has the AUTH_WHO

bit set to AUTH_WHO_CLIENT, then the client sends the initial AUTH

command, and the server responds with either ACCEPT or REJECT.

If the second octet of the authentication-type-pair has the AUTH_WHO

bit set to AUTH_WHO_SERVER, then the server sends the initial AUTH

command, and the client responds with either ACCEPT or REJECT.

4. Examples

User "joe" may wish to log in as user "pete" on machine "foo". If

"pete" h...