1/*
2 * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
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 "kuser_locl.h"
35
36static char *etype_str;
37static int version_flag;
38static int help_flag;
39
40static void
41print_and_decode_tkt (krb5_context context,
42		      krb5_data *ticket,
43		      krb5_principal server,
44		      krb5_enctype enctype)
45{
46    krb5_error_code ret;
47    krb5_crypto crypto;
48    krb5_data dec_data;
49    size_t len;
50    EncTicketPart decr_part;
51    krb5_keyblock key;
52    Ticket tkt;
53
54    ret = decode_Ticket (ticket->data, ticket->length, &tkt, &len);
55    if (ret)
56	krb5_err (context, 1, ret, "decode_Ticket");
57
58    ret = krb5_string_to_key (context, enctype, "foo", server, &key);
59    if (ret)
60	krb5_err (context, 1, ret, "krb5_string_to_key");
61
62    ret = krb5_crypto_init(context, &key, 0, &crypto);
63    if (ret)
64	krb5_err (context, 1, ret, "krb5_crypto_init");
65
66    ret = krb5_decrypt_EncryptedData (context, crypto, KRB5_KU_TICKET,
67				      &tkt.enc_part, &dec_data);
68    krb5_crypto_destroy (context, crypto);
69    if (ret)
70	krb5_err (context, 1, ret, "krb5_decrypt_EncryptedData");
71    ret = decode_EncTicketPart (dec_data.data, dec_data.length,
72				&decr_part, &len);
73    krb5_data_free (&dec_data);
74    if (ret)
75	krb5_err (context, 1, ret, "krb5_decode_EncTicketPart");
76    free_EncTicketPart(&decr_part);
77}
78
79struct getargs args[] = {
80    { "enctype",	'e', arg_string, &etype_str,
81      "encryption type to use", "enctype"},
82    { "version", 	0,   arg_flag, &version_flag },
83    { "help",		0,   arg_flag, &help_flag }
84};
85
86static void
87usage (int ret)
88{
89    arg_printusage (args,
90		    sizeof(args)/sizeof(*args),
91		    NULL,
92		    "service");
93    exit (ret);
94}
95
96int
97main(int argc, char **argv)
98{
99    krb5_error_code ret;
100    krb5_context context;
101    krb5_ccache cache;
102    krb5_creds in, *out;
103    int optidx = 0;
104
105    setprogname (argv[0]);
106
107    ret = krb5_init_context (&context);
108    if (ret)
109	errx(1, "krb5_init_context failed: %d", ret);
110
111    if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
112	usage(1);
113
114    if (help_flag)
115	usage (0);
116
117    if(version_flag) {
118	print_version(NULL);
119	exit(0);
120    }
121
122    argc -= optidx;
123    argv += optidx;
124
125    if (argc != 1)
126	usage (1);
127
128    ret = krb5_cc_default(context, &cache);
129    if (ret)
130	krb5_err (context, 1, ret, "krb5_cc_default");
131
132    memset(&in, 0, sizeof(in));
133
134    if (etype_str) {
135	krb5_enctype enctype;
136
137	ret = krb5_string_to_enctype(context, etype_str, &enctype);
138	if (ret)
139	    krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
140	in.session.keytype = enctype;
141    }
142
143    ret = krb5_cc_get_principal(context, cache, &in.client);
144    if (ret)
145	krb5_err (context, 1, ret, "krb5_cc_get_principal");
146
147    ret = krb5_parse_name(context, argv[0], &in.server);
148    if (ret)
149	krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
150
151    in.times.endtime = 0;
152    ret = krb5_get_credentials(context, 0, cache, &in, &out);
153    if (ret)
154	krb5_err (context, 1, ret, "krb5_get_credentials");
155
156    print_and_decode_tkt (context, &out->ticket, out->server,
157			  out->session.keytype);
158
159    krb5_free_cred_contents(context, out);
160    return 0;
161}
162