lib/krb5/mk_req_ext.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_mk_req_extended(krb5_context context,
  45                      krb5_auth_context *auth_context,
  46                      const krb5_flags ap_req_options,
  47                      krb5_data *in_data,
  48                      krb5_creds *in_creds,
  49                      krb5_data *outbuf)
  50 {
  51   krb5_error_code ret;
  52   krb5_data authenticator;
  53   Checksum c;
  54   Checksum *c_opt;
  55   krb5_cksumtype cksumtype;
  56   krb5_auth_context ac;
  57   krb5_enctype enctype;
  58
  59   if(auth_context) {
  60       if(*auth_context == NULL)
  61           ret = krb5_auth_con_init(context, auth_context);
  62       else
  63           ret = 0;
  64       ac = *auth_context;
  65   } else
  66       ret = krb5_auth_con_init(context, &ac);
  67   if(ret)
  68       return ret;
  69
  70   krb5_free_keyblock(context, ac->keyblock);
  71   krb5_copy_keyblock(context, &in_creds->session, &ac->keyblock);
  72
  73   if (ac->enctype)
  74       enctype = ac->enctype;
  75   else {
  76       ret = krb5_keytype_to_etype(context,
  77                                   ac->keyblock->keytype,
  78                                   &enctype);
  79       if (ret)
  80           return ret;
  81   }
  82
  83   if (ac->cksumtype)
  84       cksumtype = ac->cksumtype;
  85   else
  86       krb5_keytype_to_cksumtype (context, ac->keyblock->keytype, &cksumtype);
  87
  88   if (in_data) {
  89       ret = krb5_create_checksum (context,
  90                                   cksumtype,
  91                                   in_data->data,
  92                                   in_data->length,
  93                                   ac->keyblock,
  94                                   &c);
  95       c_opt = &c;
  96   } else {
  97       c_opt = NULL;
  98   }
  99
 100   ret = krb5_build_authenticator (context,
 101                                   ac,
 102                                   enctype,
 103                                   in_creds,
 104                                   c_opt,
 105                                   NULL,
 106                                   &authenticator);
 107   if (c_opt)
 108       free_Checksum (c_opt);
 109   if (ret)
 110     return ret;
 111
 112   ret = krb5_build_ap_req (context, enctype, in_creds, ap_req_options,
 113                            authenticator, outbuf);
 114   if(auth_context == NULL)
 115       krb5_auth_con_free(context, ac);
 116   return ret;
 117 }