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Manual Pages  — GSS_DELETE_SEC_CONTEXT

NAME

gss_delete_sec_context – Discard a security context

CONTENTS

SYNOPSIS

#include <gssapi/gssapi.h>

OM_uint32
gss_delete_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle, gss_buffer_t output_token);

DESCRIPTION

Delete a security context. gss_delete_sec_context() will delete the local data structures associated with the specified security context, and may generate an output_token, which when passed to the peer gss_process_context_token() will instruct it to do likewise. If no token is required by the mechanism, the GSS-API should set the length field of the output_token (if provided) to zero. No further security services may be obtained using the context specified by context_handle.

In addition to deleting established security contexts, gss_delete_sec_context() must also be able to delete "half-built" security contexts resulting from an incomplete sequence of gss_init_sec_context() / gss_accept_sec_context() calls.

The output_token parameter is retained for compatibility with version 1 of the GSS-API. It is recommended that both peer applications invoke gss_delete_sec_context() passing the value GSS_C_NO_BUFFER for the output_token parameter, indicating that no token is required, and that gss_delete_sec_context() should simply delete local context data structures. If the application does pass a valid buffer to gss_delete_sec_context(), mechanisms are encouraged to return a zero-length token, indicating that no peer action is necessary, and that no token should be transferred by the application.

PARAMETERS

minor_status Mechanism specific status code.
context_handle
  Context handle identifying context to delete. After deleting the context, the GSS-API will set this context handle to GSS_C_NO_CONTEXT.
output_token Token to be sent to remote application to instruct it to also delete the context. It is recommended that applications specify GSS_C_NO_BUFFER for this parameter, requesting local deletion only. If a buffer parameter is provided by the application, the mechanism may return a token in it; mechanisms that implement only local deletion should set the length field of this token to zero to indicate to the application that no token is to be sent to the peer.

RETURN VALUES

GSS_S_COMPLETE
  Successful completion
GSS_S_NO_CONTEXT
  No valid context was supplied

SEE ALSO

gss_accept_sec_context(3), gss_init_sec_context(3), gss_process_context_token(3)

STANDARDS

RFC 2743
  Generic Security Service Application Program Interface Version 2, Update 1
RFC 2744
  Generic Security Service API Version 2 : C-bindings

HISTORY

The gss_delete_sec_context function first appeared in FreeBSD 7.0 .

AUTHORS

John Wray, Iris Associates

COPYRIGHT

Copyright (C) The Internet Society (2000). All Rights Reserved.

This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.

The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns.

This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.


GSS_DELETE_SEC_CONTEXT (3) January 26, 2010

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