RFC 1929 (rfc1929) - Page 2 of 2

Username/Password Authentication for SOCKS V5

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RFC 1929          Username Authentication for SOCKS V5        March 1996


   The VER field contains the current version of the subnegotiation,
   which is X'01'. The ULEN field contains the length of the UNAME field
   that follows. The UNAME field contains the username as known to the
   source operating system. The PLEN field contains the length of the
   PASSWD field that follows. The PASSWD field contains the password
   association with the given UNAME.

   The server verifies the supplied UNAME and PASSWD, and sends the
   following response:

                        +----+--------+
                        |VER | STATUS |
                        +----+--------+
                        | 1  |   1    |
                        +----+--------+

   A STATUS field of X'00' indicates success. If the server returns a
   `failure' (STATUS value other than X'00') status, it MUST close the
   connection.

3.  Security Considerations

   This document describes a subnegotiation that provides authentication
   services to the SOCKS protocol. Since the request carries the
   password in cleartext, this subnegotiation is not recommended for
   environments where "sniffing" is possible and practical.

4.  Author's Address

   Marcus Leech
   Bell-Northern Research Ltd
   P.O. Box 3511, Station C
   Ottawa, ON
   CANADA K1Y 4H7

   Phone: +1 613 763 9145
   EMail: 














Leech                       Standards Track
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