build_ap_req.c

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/*
 * Copyright (c) 1997 - 2002 Kungliga Tekniska H鰃skolan
 * (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 <krb5_locl.h>

RCSID("$Id: build_ap_req.c 13863 2004-05-25 21:46:46Z lha $");

krb5_error_code KRB5_LIB_FUNCTION
krb5_build_ap_req (krb5_context context,
		   krb5_enctype enctype,
		   krb5_creds *cred,
		   krb5_flags ap_options,
		   krb5_data authenticator,
		   krb5_data *retdata)
{
  krb5_error_code ret = 0;
  AP_REQ ap;
  Ticket t;
  size_t len;
  
  ap.pvno = 5;
  ap.msg_type = krb_ap_req;
  memset(&ap.ap_options, 0, sizeof(ap.ap_options));
  ap.ap_options.use_session_key = (ap_options & AP_OPTS_USE_SESSION_KEY) > 0;
  ap.ap_options.mutual_required = (ap_options & AP_OPTS_MUTUAL_REQUIRED) > 0;
  
  ap.ticket.tkt_vno = 5;
  copy_Realm(&cred->server->realm, &ap.ticket.realm);
  copy_PrincipalName(&cred->server->name, &ap.ticket.sname);

  decode_Ticket(cred->ticket.data, cred->ticket.length, &t, &len);
  copy_EncryptedData(&t.enc_part, &ap.ticket.enc_part);
  free_Ticket(&t);

  ap.authenticator.etype = enctype;
  ap.authenticator.kvno  = NULL;
  ap.authenticator.cipher = authenticator;

  ASN1_MALLOC_ENCODE(AP_REQ, retdata->data, retdata->length,
		     &ap, &len, ret);
  if(ret == 0 && retdata->length != len)
      krb5_abortx(context, "internal error in ASN.1 encoder");
  free_AP_REQ(&ap);
  return ret;

}