1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 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 RCSID("$Id: mk_error.c,v 1.16 2001/05/14 06:14:49 assar Exp $"); 37 38 krb5_error_code 39 krb5_mk_error(krb5_context context, 40 krb5_error_code error_code, 41 const char *e_text, 42 const krb5_data *e_data, 43 const krb5_principal client, 44 const krb5_principal server, 45 time_t *ctime, 46 int *cusec, 47 krb5_data *reply) 48 { 49 KRB_ERROR msg; 50 u_char *buf; 51 size_t buf_size; 52 int32_t sec, usec; 53 size_t len; 54 krb5_error_code ret = 0; 55 56 krb5_us_timeofday (context, &sec, &usec); 57 58 memset(&msg, 0, sizeof(msg)); 59 msg.pvno = 5; 60 msg.msg_type = krb_error; 61 msg.stime = sec; 62 msg.susec = usec; 63 msg.ctime = ctime; 64 msg.cusec = cusec; 65 /* Make sure we only send `protocol' error codes */ 66 if(error_code < KRB5KDC_ERR_NONE || error_code >= KRB5_ERR_RCSID) { 67 if(e_text == NULL) 68 e_text = krb5_get_err_text(context, error_code); 69 error_code = KRB5KRB_ERR_GENERIC; 70 } 71 msg.error_code = error_code - KRB5KDC_ERR_NONE; 72 if (e_text) 73 msg.e_text = (general_string*)&e_text; 74 if (e_data) 75 msg.e_data = (octet_string*)e_data; 76 if(server){ 77 msg.realm = server->realm; 78 msg.sname = server->name; 79 }else{ 80 msg.realm = "<unspecified realm>"; 81 } 82 if(client){ 83 msg.crealm = &client->realm; 84 msg.cname = &client->name; 85 } 86 87 buf_size = 1024; 88 buf = malloc (buf_size); 89 if (buf == NULL) { 90 krb5_set_error_string (context, "malloc: out of memory"); 91 return ENOMEM; 92 } 93 94 do { 95 ret = encode_KRB_ERROR(buf + buf_size - 1, 96 buf_size, 97 &msg, 98 &len); 99 if (ret) { 100 if (ret == ASN1_OVERFLOW) { 101 u_char *tmp; 102 103 buf_size *= 2; 104 tmp = realloc (buf, buf_size); 105 if (tmp == NULL) { 106 krb5_set_error_string (context, "malloc: out of memory"); 107 ret = ENOMEM; 108 goto out; 109 } 110 buf = tmp; 111 } else { 112 goto out; 113 } 114 } 115 } while (ret == ASN1_OVERFLOW); 116 117 reply->length = len; 118 reply->data = malloc(len); 119 if (reply->data == NULL) { 120 krb5_set_error_string (context, "malloc: out of memory"); 121 ret = ENOMEM; 122 goto out; 123 } 124 memcpy (reply->data, buf + buf_size - len, len); 125 out: 126 free (buf); 127 return ret; 128 } 129