1/*
2 * Copyright (c) 1997 - 2007 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 "kuser_locl.h"
35
36RCSID("$Id: kgetcred.c 22276 2007-12-12 02:42:31Z lha $");
37
38static char *cache_str;
39static char *out_cache_str;
40static char *delegation_cred_str;
41static char *etype_str;
42static int transit_flag = 1;
43static int forwardable_flag;
44static char *impersonate_str;
45static char *nametype_str;
46static int version_flag;
47static int help_flag;
48
49struct getargs args[] = {
50    { "cache",		'c', arg_string, &cache_str,
51      "credential cache to use", "cache"},
52    { "out-cache",	0,   arg_string, &out_cache_str,
53      "credential cache to store credential in", "cache"},
54    { "delegation-credential-cache",0,arg_string, &delegation_cred_str,
55      "where to find the ticket use for delegation", "cache"},
56    { "forwardable",	0, arg_flag, &forwardable_flag,
57      "forwardable ticket requested"},
58    { "transit-check",	0,   arg_negative_flag, &transit_flag },
59    { "enctype",	'e', arg_string, &etype_str,
60      "encryption type to use", "enctype"},
61    { "impersonate",	0,   arg_string, &impersonate_str,
62      "client to impersonate", "principal"},
63    { "name-type",		0,   arg_string, &nametype_str },
64    { "version", 	0,   arg_flag, &version_flag },
65    { "help",		0,   arg_flag, &help_flag }
66};
67
68static void
69usage (int ret)
70{
71    arg_printusage (args,
72		    sizeof(args)/sizeof(*args),
73		    NULL,
74		    "service");
75    exit (ret);
76}
77
78int
79main(int argc, char **argv)
80{
81    krb5_error_code ret;
82    krb5_context context;
83    krb5_ccache cache;
84    krb5_creds *out;
85    int optidx = 0;
86    krb5_get_creds_opt opt;
87    krb5_principal server;
88    krb5_principal impersonate = NULL;
89
90    setprogname (argv[0]);
91
92    ret = krb5_init_context (&context);
93    if (ret)
94	errx(1, "krb5_init_context failed: %d", ret);
95
96    if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
97	usage(1);
98
99    if (help_flag)
100	usage (0);
101
102    if(version_flag) {
103	print_version(NULL);
104	exit(0);
105    }
106
107    argc -= optidx;
108    argv += optidx;
109
110    if (argc != 1)
111	usage (1);
112
113    if(cache_str) {
114	ret = krb5_cc_resolve(context, cache_str, &cache);
115	if (ret)
116	    krb5_err (context, 1, ret, "%s", cache_str);
117    } else {
118	ret = krb5_cc_default (context, &cache);
119	if (ret)
120	    krb5_err (context, 1, ret, "krb5_cc_resolve");
121    }
122
123    ret = krb5_get_creds_opt_alloc(context, &opt);
124    if (ret)
125	krb5_err (context, 1, ret, "krb5_get_creds_opt_alloc");
126
127    if (etype_str) {
128	krb5_enctype enctype;
129
130	ret = krb5_string_to_enctype(context, etype_str, &enctype);
131	if (ret)
132	    krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
133	krb5_get_creds_opt_set_enctype(context, opt, enctype);
134    }
135
136    if (impersonate_str) {
137	ret = krb5_parse_name(context, impersonate_str, &impersonate);
138	if (ret)
139	    krb5_err (context, 1, ret, "krb5_parse_name %s", impersonate_str);
140	krb5_get_creds_opt_set_impersonate(context, opt, impersonate);
141	krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
142    }
143
144    if (out_cache_str)
145	krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
146
147    if (forwardable_flag)
148	krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
149    if (!transit_flag)
150	krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_TRANSIT_CHECK);
151
152    if (delegation_cred_str) {
153	krb5_ccache id;
154	krb5_creds c, mc;
155	Ticket ticket;
156
157	krb5_cc_clear_mcred(&mc);
158	ret = krb5_cc_get_principal(context, cache, &mc.server);
159	if (ret)
160	    krb5_err (context, 1, ret, "krb5_cc_get_principal");
161
162	ret = krb5_cc_resolve(context, delegation_cred_str, &id);
163	if(ret)
164	    krb5_err (context, 1, ret, "krb5_cc_resolve");
165
166	ret = krb5_cc_retrieve_cred(context, id, 0, &mc, &c);
167	if(ret)
168	    krb5_err (context, 1, ret, "krb5_cc_retrieve_cred");
169
170	ret = decode_Ticket(c.ticket.data, c.ticket.length, &ticket, NULL);
171	if (ret) {
172	    krb5_clear_error_string(context);
173	    krb5_err (context, 1, ret, "decode_Ticket");
174	}
175	krb5_free_cred_contents(context, &c);
176
177	ret = krb5_get_creds_opt_set_ticket(context, opt, &ticket);
178	if(ret)
179	    krb5_err (context, 1, ret, "krb5_get_creds_opt_set_ticket");
180	free_Ticket(&ticket);
181
182	krb5_cc_close (context, id);
183	krb5_free_principal(context, mc.server);
184
185	krb5_get_creds_opt_add_options(context, opt,
186				       KRB5_GC_CONSTRAINED_DELEGATION);
187    }
188
189    ret = krb5_parse_name(context, argv[0], &server);
190    if (ret)
191	krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
192
193    if (nametype_str) {
194	ret = krb5_parse_nametype(context, nametype_str,
195				  &server->name.name_type);
196	if (ret)
197	    krb5_err(context, 1, ret, "krb5_parse_nametype");
198    }
199
200    ret = krb5_get_creds(context, opt, cache, server, &out);
201    if (ret)
202	krb5_err (context, 1, ret, "krb5_get_creds");
203
204    if (out_cache_str) {
205	krb5_ccache id;
206
207	ret = krb5_cc_resolve(context, out_cache_str, &id);
208	if(ret)
209	    krb5_err (context, 1, ret, "krb5_cc_resolve");
210
211	ret = krb5_cc_initialize(context, id, out->client);
212	if(ret)
213	    krb5_err (context, 1, ret, "krb5_cc_initialize");
214
215	ret = krb5_cc_store_cred(context, id, out);
216	if(ret)
217	    krb5_err (context, 1, ret, "krb5_cc_store_cred");
218	krb5_cc_close (context, id);
219    }
220
221    krb5_free_creds(context, out);
222    krb5_free_principal(context, server);
223    krb5_get_creds_opt_free(context, opt);
224    krb5_cc_close (context, cache);
225    krb5_free_context (context);
226
227    return 0;
228}
229