xref: /freebsd/crypto/heimdal/lib/krb5/build_ap_req.c (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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: build_ap_req.c,v 1.17 2001/05/14 06:14:44 assar Exp $");
37 
38 krb5_error_code
39 krb5_build_ap_req (krb5_context context,
40 		   krb5_enctype enctype,
41 		   krb5_creds *cred,
42 		   krb5_flags ap_options,
43 		   krb5_data authenticator,
44 		   krb5_data *retdata)
45 {
46   krb5_error_code ret = 0;
47   AP_REQ ap;
48   Ticket t;
49   size_t len;
50 
51   ap.pvno = 5;
52   ap.msg_type = krb_ap_req;
53   memset(&ap.ap_options, 0, sizeof(ap.ap_options));
54   ap.ap_options.use_session_key = (ap_options & AP_OPTS_USE_SESSION_KEY) > 0;
55   ap.ap_options.mutual_required = (ap_options & AP_OPTS_MUTUAL_REQUIRED) > 0;
56 
57   ap.ticket.tkt_vno = 5;
58   copy_Realm(&cred->server->realm, &ap.ticket.realm);
59   copy_PrincipalName(&cred->server->name, &ap.ticket.sname);
60 
61   decode_Ticket(cred->ticket.data, cred->ticket.length, &t, &len);
62   copy_EncryptedData(&t.enc_part, &ap.ticket.enc_part);
63   free_Ticket(&t);
64 
65   ap.authenticator.etype = enctype;
66   ap.authenticator.kvno  = NULL;
67   ap.authenticator.cipher = authenticator;
68 
69   retdata->length = length_AP_REQ(&ap);
70   retdata->data   = malloc(retdata->length);
71   if(retdata->data == NULL) {
72       krb5_set_error_string(context, "malloc: out of memory");
73       ret = ENOMEM;
74   } else
75       encode_AP_REQ((unsigned char *)retdata->data + retdata->length - 1,
76 		    retdata->length, &ap, &len);
77   free_AP_REQ(&ap);
78 
79   return ret;
80 }
81