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/10.1/sys/kgssapi/gss_delete_sec_context.c 244370 2012-12-18 00:25:48Z rmacklem $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/kernel.h>
   33 #include <sys/kobj.h>
   34 #include <sys/lock.h>
   35 #include <sys/malloc.h>
   36 #include <sys/mutex.h>
   37 
   38 #include <kgssapi/gssapi.h>
   39 #include <kgssapi/gssapi_impl.h>
   40 
   41 #include "gssd.h"
   42 
   43 OM_uint32
   44 gss_delete_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle,
   45         gss_buffer_t output_token)
   46 {
   47         struct delete_sec_context_res res;
   48         struct delete_sec_context_args args;
   49         enum clnt_stat stat;
   50         gss_ctx_id_t ctx;
   51         CLIENT *cl;
   52 
   53         *minor_status = 0;
   54 
   55         if (!kgss_gssd_handle)
   56                 return (GSS_S_FAILURE);
   57 
   58         if (*context_handle) {
   59                 ctx = *context_handle;
   60 
   61                 /*
   62                  * If we are past the context establishment phase, let
   63                  * the in-kernel code do the delete, otherwise
   64                  * userland needs to deal with it.
   65                  */
   66                 if (ctx->handle) {
   67                         args.ctx = ctx->handle;
   68                         cl = kgss_gssd_client();
   69                         if (cl == NULL)
   70                                 return (GSS_S_FAILURE);
   71         
   72                         bzero(&res, sizeof(res));
   73                         stat = gssd_delete_sec_context_1(&args, &res, cl);
   74                         CLNT_RELEASE(cl);
   75                         if (stat != RPC_SUCCESS) {
   76                                 *minor_status = stat;
   77                                 return (GSS_S_FAILURE);
   78                         }
   79 
   80                         if (output_token)
   81                                 kgss_copy_buffer(&res.output_token,
   82                                     output_token);
   83                         xdr_free((xdrproc_t) xdr_delete_sec_context_res, &res);
   84 
   85                         kgss_delete_context(ctx, NULL);
   86                 } else {
   87                         kgss_delete_context(ctx, output_token);
   88                 }
   89                 *context_handle = NULL;
   90         } else {
   91                 if (output_token) {
   92                         output_token->length = 0;
   93                         output_token->value = NULL;
   94                 }
   95         }
   96 
   97         return (GSS_S_COMPLETE);
   98 }

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