RFC 2203 (rfc2203) - Page 2 of 23

RPCSEC_GSS Protocol Specification

Alternative Format: Original Text Document
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RFC 2203           RPCSEC_GSS Protocol Specification      September 1997


   5.3.3.4.  Mapping of GSS-API Errors to Server Responses  . . . .  16
   5.3.3.4.1.  GSS_GetMIC() Failure . . . . . . . . . . . . . . . .  16
   5.3.3.4.2.  GSS_VerifyMIC() Failure  . . . . . . . . . . . . . .  16
   5.3.3.4.3.  GSS_Unwrap() Failure . . . . . . . . . . . . . . . .  16
   5.3.3.4.4.  GSS_Wrap() Failure . . . . . . . . . . . . . . . . .  16
   5.4.  Context Destruction  . . . . . . . . . . . . . . . . . . .  17
   6.  Set of GSS-API Mechanisms  . . . . . . . . . . . . . . . . .  17
   7.  Security Considerations  . . . . . . . . . . . . . . . . . .  18
   7.1.  Privacy of Call Header . . . . . . . . . . . . . . . . . .  18
   7.2.  Sequence Number Attacks  . . . . . . . . . . . . . . . . .  18
   7.2.1.  Sequence Numbers Above the Window  . . . . . . . . . . .  18
   7.2.2.  Sequence Numbers Within or Below the Window  . . . . . .  18
   7.3.  Message Stealing Attacks . . . . . . . . . . . . . . . . .  19
   Appendix A. GSS-API Major Status Codes . . . . . . . . . . . . .  20
   Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . .  22
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   This document describes the protocol used by the RPCSEC_GSS security
   flavor.  Security flavors have been called authentication flavors for
   historical reasons. This memo recognizes that there are two other
   security services besides authentication, integrity, and privacy, and
   so defines a new RPCSEC_GSS security flavor.

   The protocol is described using the XDR language [Srinivasan-xdr].
   The reader is assumed to be familiar with ONC RPC and the security
   flavor mechanism [Srinivasan-rpc].  The reader is also assumed to be
   familiar with the GSS-API framework [Linn].  The RPCSEC_GSS security
   flavor uses GSS-API interfaces to provide security services that are
   independent of the underlying security mechanism.

2.  The ONC RPC Message Protocol

   This memo refers to the following XDR types of the ONC RPC protocol,
   which are described in the document entitled Remote Procedure Call
   Protocol Specification Version 2 [Srinivasan-rpc]:

      msg_type
      reply_stat
      auth_flavor
      accept_stat
      reject_stat
      auth_stat
      opaque_auth
      rpc_msg
      call_body
      reply_body



Eisler, et. al.             Standards Track
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