1/*	$NetBSD: kdecode_ticket.c,v 1.2 2017/01/28 21:31:45 christos Exp $	*/
2
3/*
4 * Copyright (c) 1997 - 2004 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 "kuser_locl.h"
37
38static char *etype_str;
39static int version_flag;
40static int help_flag;
41
42static void
43print_and_decode_tkt (krb5_context context,
44		      krb5_data *ticket,
45		      krb5_principal server,
46		      krb5_enctype enctype)
47{
48    krb5_error_code ret;
49    krb5_crypto crypto;
50    krb5_data dec_data;
51    size_t len;
52    EncTicketPart decr_part;
53    krb5_keyblock key;
54    Ticket tkt;
55
56    ret = decode_Ticket (ticket->data, ticket->length, &tkt, &len);
57    if (ret)
58	krb5_err (context, 1, ret, "decode_Ticket");
59
60    ret = krb5_string_to_key (context, enctype, "foo", server, &key);
61    if (ret)
62	krb5_err (context, 1, ret, "krb5_string_to_key");
63
64    ret = krb5_crypto_init(context, &key, 0, &crypto);
65    if (ret)
66	krb5_err (context, 1, ret, "krb5_crypto_init");
67
68    ret = krb5_decrypt_EncryptedData (context, crypto, KRB5_KU_TICKET,
69				      &tkt.enc_part, &dec_data);
70    krb5_crypto_destroy (context, crypto);
71    if (ret)
72	krb5_err (context, 1, ret, "krb5_decrypt_EncryptedData");
73    ret = decode_EncTicketPart (dec_data.data, dec_data.length,
74				&decr_part, &len);
75    krb5_data_free (&dec_data);
76    if (ret)
77	krb5_err (context, 1, ret, "krb5_decode_EncTicketPart");
78    free_EncTicketPart(&decr_part);
79}
80
81struct getargs args[] = {
82    { "enctype",	'e', arg_string, &etype_str,
83      "encryption type to use", "enctype"},
84    { "version", 	0,   arg_flag, &version_flag, NULL, NULL },
85    { "help",		0,   arg_flag, &help_flag, NULL, NULL }
86};
87
88static void
89usage (int ret)
90{
91    arg_printusage (args,
92		    sizeof(args)/sizeof(*args),
93		    NULL,
94		    "service");
95    exit (ret);
96}
97
98int
99main(int argc, char **argv)
100{
101    krb5_error_code ret;
102    krb5_context context;
103    krb5_ccache cache;
104    krb5_creds in, *out;
105    int optidx = 0;
106
107    setprogname (argv[0]);
108
109    ret = krb5_init_context (&context);
110    if (ret)
111	errx(1, "krb5_init_context failed: %d", ret);
112
113    if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
114	usage(1);
115
116    if (help_flag)
117	usage (0);
118
119    if(version_flag) {
120	print_version(NULL);
121	exit(0);
122    }
123
124    argc -= optidx;
125    argv += optidx;
126
127    if (argc != 1)
128	usage (1);
129
130    ret = krb5_cc_default(context, &cache);
131    if (ret)
132	krb5_err (context, 1, ret, "krb5_cc_default");
133
134    memset(&in, 0, sizeof(in));
135
136    if (etype_str) {
137	krb5_enctype enctype;
138
139	ret = krb5_string_to_enctype(context, etype_str, &enctype);
140	if (ret)
141	    krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
142	in.session.keytype = enctype;
143    }
144
145    ret = krb5_cc_get_principal(context, cache, &in.client);
146    if (ret)
147	krb5_err (context, 1, ret, "krb5_cc_get_principal");
148
149    ret = krb5_parse_name(context, argv[0], &in.server);
150    if (ret)
151	krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
152
153    in.times.endtime = 0;
154    ret = krb5_get_credentials(context, 0, cache, &in, &out);
155    if (ret)
156	krb5_err (context, 1, ret, "krb5_get_credentials");
157
158    print_and_decode_tkt (context, &out->ticket, out->server,
159			  out->session.keytype);
160
161    krb5_free_cred_contents(context, out);
162    return 0;
163}
164