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      1 /*	$NetBSD: mk_error.c,v 1.2 2017/01/28 21:31:49 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 - 2003 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include "krb5_locl.h"
     37 
     38 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
     39 krb5_mk_error_ext(krb5_context context,
     40 		  krb5_error_code error_code,
     41 		  const char *e_text,
     42 		  const krb5_data *e_data,
     43 		  const krb5_principal server,
     44 		  const PrincipalName *client_name,
     45 		  const Realm *client_realm,
     46 		  time_t *client_time,
     47 		  int *client_usec,
     48 		  krb5_data *reply)
     49 {
     50     const char *e_text2 = NULL;
     51     KRB_ERROR msg;
     52     krb5_timestamp sec;
     53     int32_t usec;
     54     size_t len = 0;
     55     krb5_error_code ret = 0;
     56 
     57     krb5_us_timeofday (context, &sec, &usec);
     58 
     59     memset(&msg, 0, sizeof(msg));
     60     msg.pvno     = 5;
     61     msg.msg_type = krb_error;
     62     msg.stime    = sec;
     63     msg.susec    = usec;
     64     msg.ctime    = client_time;
     65     msg.cusec    = client_usec;
     66     /* Make sure we only send `protocol' error codes */
     67     if(error_code < KRB5KDC_ERR_NONE || error_code >= KRB5_ERR_RCSID) {
     68 	if(e_text == NULL)
     69 	    e_text = e_text2 = krb5_get_error_message(context, error_code);
     70 	error_code = KRB5KRB_ERR_GENERIC;
     71     }
     72     msg.error_code = error_code - KRB5KDC_ERR_NONE;
     73     if (e_text)
     74 	msg.e_text = rk_UNCONST(&e_text);
     75     if (e_data)
     76 	msg.e_data = rk_UNCONST(e_data);
     77     if(server){
     78 	msg.realm = server->realm;
     79 	msg.sname = server->name;
     80     }else{
     81 	static char unspec[] = "<unspecified realm>";
     82 	msg.realm = unspec;
     83     }
     84     msg.crealm = rk_UNCONST(client_realm);
     85     msg.cname = rk_UNCONST(client_name);
     86 
     87     ASN1_MALLOC_ENCODE(KRB_ERROR, reply->data, reply->length, &msg, &len, ret);
     88     if (e_text2)
     89 	krb5_free_error_message(context, e_text2);
     90     if (ret)
     91 	return ret;
     92     if(reply->length != len)
     93 	krb5_abortx(context, "internal error in ASN.1 encoder");
     94     return 0;
     95 }
     96 
     97 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
     98 krb5_mk_error(krb5_context context,
     99 	      krb5_error_code error_code,
    100 	      const char *e_text,
    101 	      const krb5_data *e_data,
    102 	      const krb5_principal client,
    103 	      const krb5_principal server,
    104 	      time_t *client_time,
    105 	      int *client_usec,
    106 	      krb5_data *reply)
    107 {
    108     const PrincipalName *client_name = NULL;
    109     const Realm *client_realm = NULL;
    110 
    111     if (client) {
    112 	client_realm = &client->realm;
    113 	client_name = &client->name;
    114     }
    115 
    116     return krb5_mk_error_ext(context, error_code, e_text, e_data,
    117 			     server, client_name, client_realm,
    118 			     client_time, client_usec, reply);
    119 }
    120