lib/krb5/mk_error.c

   1 /*
   2  * Copyright (c) 1997 - 2003 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_error_code KRB5_LIB_FUNCTION
  37 krb5_mk_error(krb5_context context,
  38               krb5_error_code error_code,
  39               const char *e_text,
  40               const krb5_data *e_data,
  41               const krb5_principal client,
  42               const krb5_principal server,
  43               time_t *client_time,
  44               int *client_usec,
  45               krb5_data *reply)
  46 {
  47     KRB_ERROR msg;
  48     krb5_timestamp sec;
  49     int32_t usec;
  50     size_t len;
  51     krb5_error_code ret = 0;
  52
  53     krb5_us_timeofday (context, &sec, &usec);
  54
  55     memset(&msg, 0, sizeof(msg));
  56     msg.pvno     = 5;
  57     msg.msg_type = krb_error;
  58     msg.stime    = sec;
  59     msg.susec    = usec;
  60     msg.ctime    = client_time;
  61     msg.cusec    = client_usec;
  62     /* Make sure we only send `protocol' error codes */
  63     if(error_code < KRB5KDC_ERR_NONE || error_code >= KRB5_ERR_RCSID) {
  64         if(e_text == NULL)
  65             e_text = krb5_get_err_text(context, error_code);
  66         error_code = KRB5KRB_ERR_GENERIC;
  67     }
  68     msg.error_code = error_code - KRB5KDC_ERR_NONE;
  69     if (e_text)
  70         msg.e_text = rk_UNCONST(&e_text);
  71     if (e_data)
  72         msg.e_data = rk_UNCONST(e_data);
  73     if(server){
  74         msg.realm = server->realm;
  75         msg.sname = server->name;
  76     }else{
  77         msg.realm = "<unspecified realm>";
  78     }
  79     if(client){
  80         msg.crealm = &client->realm;
  81         msg.cname = &client->name;
  82     }
  83
  84     ASN1_MALLOC_ENCODE(KRB_ERROR, reply->data, reply->length, &msg, &len, ret);
  85     if (ret)
  86         return ret;
  87     if(reply->length != len)
  88         krb5_abortx(context, "internal error in ASN.1 encoder");
  89     return 0;
  90 }