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 Högskolan
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
krb5_mk_error_ext(krb5_context context,krb5_error_code error_code,const char * e_text,const krb5_data * e_data,const krb5_principal server,const PrincipalName * client_name,const Realm * client_realm,time_t * client_time,int * client_usec,krb5_data * reply)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
krb5_mk_error(krb5_context context,krb5_error_code error_code,const char * e_text,const krb5_data * e_data,const krb5_principal client,const krb5_principal server,time_t * client_time,int * client_usec,krb5_data * reply)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