The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kgssapi/gss_delete_sec_context.c

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    1 /*-
    2  * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
    3  * Authors: Doug Rabson <dfr@rabson.org>
    4  * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/9.0/sys/kgssapi/gss_delete_sec_context.c 184588 2008-11-03 10:38:00Z dfr $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/kernel.h>
   33 #include <sys/kobj.h>
   34 #include <sys/malloc.h>
   35 
   36 #include <kgssapi/gssapi.h>
   37 #include <kgssapi/gssapi_impl.h>
   38 
   39 #include "gssd.h"
   40 
   41 OM_uint32
   42 gss_delete_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle,
   43         gss_buffer_t output_token)
   44 {
   45         struct delete_sec_context_res res;
   46         struct delete_sec_context_args args;
   47         enum clnt_stat stat;
   48         gss_ctx_id_t ctx;
   49 
   50         if (!kgss_gssd_handle)
   51                 return (GSS_S_FAILURE);
   52 
   53         if (*context_handle) {
   54                 ctx = *context_handle;
   55 
   56                 /*
   57                  * If we are past the context establishment phase, let
   58                  * the in-kernel code do the delete, otherwise
   59                  * userland needs to deal with it.
   60                  */
   61                 if (ctx->handle) {
   62                         args.ctx = ctx->handle;
   63         
   64                         bzero(&res, sizeof(res));
   65                         stat = gssd_delete_sec_context_1(&args, &res, kgss_gssd_handle);
   66                         if (stat != RPC_SUCCESS) {
   67                                 *minor_status = stat;
   68                                 return (GSS_S_FAILURE);
   69                         }
   70 
   71                         if (output_token)
   72                                 kgss_copy_buffer(&res.output_token,
   73                                     output_token);
   74                         xdr_free((xdrproc_t) xdr_delete_sec_context_res, &res);
   75 
   76                         kgss_delete_context(ctx, NULL);
   77                 } else {
   78                         kgss_delete_context(ctx, output_token);
   79                 }
   80                 *context_handle = NULL;
   81         } else {
   82                 if (output_token) {
   83                         output_token->length = 0;
   84                         output_token->value = NULL;
   85                 }
   86         }
   87 
   88         *minor_status = 0;
   89 
   90         return (GSS_S_COMPLETE);
   91 }

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