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 H��gskolan
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
38KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
39krb5_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
97KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
98krb5_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