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_unwrap.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/8.4/sys/kgssapi/gss_unwrap.c 199583 2009-11-20 15:27:52Z jhb $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/kernel.h>
   33 #include <sys/kobj.h>
   34 #include <sys/malloc.h>
   35 #include <sys/mbuf.h>
   36 
   37 #include <kgssapi/gssapi.h>
   38 #include <kgssapi/gssapi_impl.h>
   39 
   40 #include "kgss_if.h"
   41 
   42 OM_uint32
   43 gss_unwrap(OM_uint32 *minor_status,
   44     const gss_ctx_id_t ctx,
   45     const gss_buffer_t input_message_buffer,
   46     gss_buffer_t output_message_buffer,
   47     int *conf_state,
   48     gss_qop_t *qop_state)
   49 {
   50         OM_uint32 maj_stat;
   51         struct mbuf *m;
   52 
   53         if (!ctx) {
   54                 *minor_status = 0;
   55                 return (GSS_S_NO_CONTEXT);
   56         }
   57 
   58         MGET(m, M_WAITOK, MT_DATA);
   59         if (input_message_buffer->length > MLEN)
   60                 MCLGET(m, M_WAITOK);
   61         m_append(m, input_message_buffer->length, input_message_buffer->value);
   62 
   63         maj_stat = KGSS_UNWRAP(ctx, minor_status, &m, conf_state, qop_state);
   64 
   65         /*
   66          * On success, m is the wrapped message, on failure, m is
   67          * freed.
   68          */
   69         if (maj_stat == GSS_S_COMPLETE) {
   70                 output_message_buffer->length = m_length(m, NULL);
   71                 output_message_buffer->value =
   72                         malloc(output_message_buffer->length,
   73                             M_GSSAPI, M_WAITOK);
   74                 m_copydata(m, 0, output_message_buffer->length,
   75                     output_message_buffer->value);
   76                 m_freem(m);
   77         }
   78 
   79         return (maj_stat);
   80 }
   81 
   82 OM_uint32
   83 gss_unwrap_mbuf(OM_uint32 *minor_status,
   84     const gss_ctx_id_t ctx,
   85     struct mbuf **mp,
   86     int *conf_state,
   87     gss_qop_t *qop_state)
   88 {
   89 
   90         if (!ctx) {
   91                 *minor_status = 0;
   92                 return (GSS_S_NO_CONTEXT);
   93         }
   94 
   95         return (KGSS_UNWRAP(ctx, minor_status, mp, conf_state, qop_state));
   96 }
   97 

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