lib/krb5/build_ap_req.c

   1 /*
   2  * Copyright (c) 1997 - 2002 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. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
  37 krb5_build_ap_req (krb5_context context,
  38                    krb5_enctype enctype,
  39                    krb5_creds *cred,
  40                    krb5_flags ap_options,
  41                    krb5_data authenticator,
  42                    krb5_data *retdata)
  43 {
  44   krb5_error_code ret = 0;
  45   AP_REQ ap;
  46   Ticket t;
  47   size_t len;
  48
  49   ap.pvno = 5;
  50   ap.msg_type = krb_ap_req;
  51   memset(&ap.ap_options, 0, sizeof(ap.ap_options));
  52   ap.ap_options.use_session_key = (ap_options & AP_OPTS_USE_SESSION_KEY) > 0;
  53   ap.ap_options.mutual_required = (ap_options & AP_OPTS_MUTUAL_REQUIRED) > 0;
  54
  55   ap.ticket.tkt_vno = 5;
  56   copy_Realm(&cred->server->realm, &ap.ticket.realm);
  57   copy_PrincipalName(&cred->server->name, &ap.ticket.sname);
  58
  59   decode_Ticket(cred->ticket.data, cred->ticket.length, &t, &len);
  60   copy_EncryptedData(&t.enc_part, &ap.ticket.enc_part);
  61   free_Ticket(&t);
  62
  63   ap.authenticator.etype = enctype;
  64   ap.authenticator.kvno  = NULL;
  65   ap.authenticator.cipher = authenticator;
  66
  67   ASN1_MALLOC_ENCODE(AP_REQ, retdata->data, retdata->length,
  68                      &ap, &len, ret);
  69   if(ret == 0 && retdata->length != len)
  70       krb5_abortx(context, "internal error in ASN.1 encoder");
  71   free_AP_REQ(&ap);
  72   return ret;
  73
  74 }