RFC 2203 (rfc2203) - Page 1 of 23

RPCSEC_GSS Protocol Specification

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Network Working Group                                          M. Eisler
Request for Comments: 2203                                       A. Chiu
Category: Standards Track                                        L. Ling
                                                          September 1997


                   RPCSEC_GSS Protocol Specification

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   This memo describes an ONC/RPC security flavor that allows RPC
   protocols to access the Generic Security Services Application
   Programming Interface (referred to henceforth as GSS-API).

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
   2.  The ONC RPC Message Protocol . . . . . . . . . . . . . . . . . 2
   3.  Flavor Number Assignment . . . . . . . . . . . . . . . . . . . 3
   4.  New auth_stat Values . . . . . . . . . . . . . . . . . . . . . 3
   5.  Elements of the RPCSEC_GSS Security Protocol . . . . . . . . . 3
   5.1.  Version Selection  . . . . . . . . . . . . . . . . . . . . . 5
   5.2.  Context Creation . . . . . . . . . . . . . . . . . . . . . . 5
   5.2.1.  Mechanism and QOP Selection  . . . . . . . . . . . . . . . 5
   5.2.2.  Context Creation Requests  . . . . . . . . . . . . . . . . 6
   5.2.3.  Context Creation Responses . . . . . . . . . . . . . . . . 8
   5.2.3.1.  Context Creation Response - Successful Acceptance  . . . 8
   5.2.3.1.1.  Client Processing of Successful Context Creation
               Responses  . . . . . . . . . . . . . . . . . . . . . . 9
   5.2.3.2.  Context Creation Response - Unsuccessful Cases . . . . . 9
   5.3.  RPC Data Exchange  . . . . . . . . . . . . . . . . . . . .  10
   5.3.1.  RPC Request Header . . . . . . . . . . . . . . . . . . .  10
   5.3.2.  RPC Request Data . . . . . . . . . . . . . . . . . . . .  11
   5.3.2.1.  RPC Request Data - No Data Integrity . . . . . . . . .  11
   5.3.2.2.  RPC Request Data - With Data Integrity . . . . . . . .  11
   5.3.2.3.  RPC Request Data - With Data Privacy . . . . . . . . .  12
   5.3.3.  Server Processing of RPC Data Requests . . . . . . . . .  12
   5.3.3.1.  Context Management . . . . . . . . . . . . . . . . . .  12
   5.3.3.2.  Server Reply - Request Accepted  . . . . . . . . . . .  14
   5.3.3.3.  Server Reply - Request Denied  . . . . . . . . . . . .  15



Eisler, et. al.             Standards Track
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