lib/krb5/build_ap_req.c

   1 /*
   2  * Copyright (c) 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   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  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <krb5_locl.h>
  40
  41 RCSID("$Id$");
  42
  43 krb5_error_code
  44 krb5_build_ap_req (krb5_context context,
  45                    krb5_enctype enctype,
  46                    krb5_creds *cred,
  47                    krb5_flags ap_options,
  48                    krb5_data authenticator,
  49                    krb5_data *retdata)
  50 {
  51   krb5_error_code ret = 0;
  52   AP_REQ ap;
  53   Ticket t;
  54   size_t len;
  55
  56   ap.pvno = 5;
  57   ap.msg_type = krb_ap_req;
  58   memset(&ap.ap_options, 0, sizeof(ap.ap_options));
  59   ap.ap_options.use_session_key = (ap_options & AP_OPTS_USE_SESSION_KEY) > 0;
  60   ap.ap_options.mutual_required = (ap_options & AP_OPTS_MUTUAL_REQUIRED) > 0;
  61
  62   ap.ticket.tkt_vno = 5;
  63   copy_Realm(&cred->server->realm, &ap.ticket.realm);
  64   copy_PrincipalName(&cred->server->name, &ap.ticket.sname);
  65
  66   decode_Ticket(cred->ticket.data, cred->ticket.length, &t, &len);
  67   copy_EncryptedData(&t.enc_part, &ap.ticket.enc_part);
  68   free_Ticket(&t);
  69
  70   ap.authenticator.etype = enctype;
  71   ap.authenticator.kvno  = NULL;
  72   ap.authenticator.cipher = authenticator;
  73
  74   retdata->length = length_AP_REQ(&ap);
  75   retdata->data = malloc(retdata->length);
  76   if(retdata->data == NULL)
  77       ret = ENOMEM;
  78   else
  79       encode_AP_REQ((unsigned char *)retdata->data + retdata->length - 1,
  80                     retdata->length, &ap, &len);
  81   free_AP_REQ(&ap);
  82
  83   return ret;
  84 }