/*
 * Copyright (c) 2006 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */

#include "mech_locl.h"
RCSID("$Id: gss_decapsulate_token.c 19951 2007-01-17 10:14:58Z lha $");

OM_uint32
gss_decapsulate_token(gss_buffer_t input_token,
		      gss_OID oid,
		      gss_buffer_t output_token)
{
    GSSAPIContextToken ct;
    heim_oid o;
    OM_uint32 status;
    int ret;
    size_t size;

    _mg_buffer_zero(output_token);

    ret = der_get_oid (oid->elements, oid->length, &o, &size);
    if (ret)
	return GSS_S_FAILURE;

    ret = decode_GSSAPIContextToken(input_token->value, input_token->length,
				    &ct, NULL);
    if (ret) {
	der_free_oid(&o);
	return GSS_S_FAILURE;
    }	
    
    if (der_heim_oid_cmp(&ct.thisMech, &o) == 0) {
	status = GSS_S_COMPLETE;
	output_token->value = ct.innerContextToken.data;
	output_token->length = ct.innerContextToken.length;
	der_free_oid(&ct.thisMech);
    } else {
	free_GSSAPIContextToken(&ct);
 	status = GSS_S_FAILURE;
    }
    der_free_oid(&o);

    return status;
}
