Line data Source code
1 : /*
2 : * Copyright (c) 1997 - 2008 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 :
36 : static char *cache_str;
37 : static char *out_cache_str;
38 : static char *delegation_cred_str;
39 : static char *etype_str;
40 : static int transit_flag = 1;
41 : static int forwardable_flag;
42 : static int canonicalize_flag;
43 : static int is_hostbased_flag;
44 : static int is_canonical_flag;
45 : static char *impersonate_str;
46 : static char *nametype_str;
47 : static int store_flag = 1;
48 : static int cached_only_flag;
49 : static int anonymous_flag;
50 : static int debug_flag;
51 : static int version_flag;
52 : static int help_flag;
53 :
54 : struct getargs args[] = {
55 : { "cache", 'c', arg_string, &cache_str,
56 : NP_("credential cache to use", ""), "cache"},
57 : { "out-cache", 0, arg_string, &out_cache_str,
58 : NP_("credential cache to store credential in", ""), "cache"},
59 : { "delegation-credential-cache",0,arg_string, &delegation_cred_str,
60 : NP_("where to find the ticket use for delegation", ""), "cache"},
61 : { "canonicalize", 0, arg_flag, &canonicalize_flag,
62 : NP_("canonicalize the principal (chase referrals)", ""), NULL },
63 : { "canonical", 0, arg_flag, &is_canonical_flag,
64 : NP_("the name components are canonical", ""), NULL },
65 : { "forwardable", 0, arg_flag, &forwardable_flag,
66 : NP_("forwardable ticket requested", ""), NULL},
67 : { "transit-check", 0, arg_negative_flag, &transit_flag, NULL, NULL },
68 : { "enctype", 'e', arg_string, &etype_str,
69 : NP_("encryption type to use", ""), "enctype"},
70 : { "impersonate", 0, arg_string, &impersonate_str,
71 : NP_("client to impersonate", ""), "principal"},
72 : { "name-type", 0, arg_string, &nametype_str,
73 : NP_("Kerberos name type", ""), NULL },
74 : { "hostbased", 'H', arg_flag, &is_hostbased_flag,
75 : NP_("indicate that the name is a host-based service name", ""), NULL },
76 : { "store", 0, arg_negative_flag, &store_flag,
77 : NP_("don't store the tickets obtained in the cache", ""), NULL },
78 : { "cached-only", 0, arg_flag, &cached_only_flag,
79 : NP_("don't talk to the KDC, just search the cache", ""), NULL },
80 : { "anonymous", 'n', arg_flag, &anonymous_flag,
81 : NP_("request an anonymous ticket", ""), NULL },
82 : { "debug", 0, arg_flag, &debug_flag, NULL, NULL },
83 : { "version", 0, arg_flag, &version_flag, NULL, NULL },
84 : { "help", 0, arg_flag, &help_flag, NULL, NULL }
85 : };
86 :
87 : static void
88 0 : usage(int ret)
89 : {
90 0 : arg_printusage(args,
91 : sizeof(args)/sizeof(*args),
92 : NULL,
93 : "service");
94 0 : exit (ret);
95 : }
96 :
97 : int
98 12 : main(int argc, char **argv)
99 : {
100 : krb5_error_code ret;
101 : krb5_context context;
102 : krb5_ccache cache;
103 : krb5_creds *out;
104 12 : int optidx = 0;
105 12 : int32_t nametype = KRB5_NT_UNKNOWN;
106 : krb5_get_creds_opt opt;
107 12 : krb5_principal server = NULL;
108 : krb5_principal impersonate;
109 :
110 12 : setprogname(argv[0]);
111 :
112 12 : ret = krb5_init_context(&context);
113 12 : if (ret)
114 0 : errx(1, "krb5_init_context failed: %d", ret);
115 :
116 12 : if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
117 0 : usage(1);
118 :
119 12 : if (help_flag)
120 0 : usage (0);
121 :
122 12 : if (version_flag) {
123 0 : print_version(NULL);
124 0 : exit(0);
125 : }
126 :
127 12 : argc -= optidx;
128 12 : argv += optidx;
129 :
130 12 : if (debug_flag) {
131 0 : ret = krb5_set_debug_dest(context, getprogname(), "STDERR");
132 0 : if (ret)
133 0 : krb5_warn(context, ret, "krb5_set_debug_dest");
134 : }
135 :
136 12 : if (cache_str) {
137 3 : ret = krb5_cc_resolve(context, cache_str, &cache);
138 3 : if (ret)
139 0 : krb5_err(context, 1, ret, "%s", cache_str);
140 : } else {
141 9 : ret = krb5_cc_default (context, &cache);
142 9 : if (ret)
143 0 : krb5_err(context, 1, ret, "krb5_cc_resolve");
144 : }
145 :
146 12 : ret = krb5_get_creds_opt_alloc(context, &opt);
147 12 : if (ret)
148 0 : krb5_err(context, 1, ret, "krb5_get_creds_opt_alloc");
149 :
150 12 : if (etype_str) {
151 : krb5_enctype enctype;
152 :
153 0 : ret = krb5_string_to_enctype(context, etype_str, &enctype);
154 0 : if (ret)
155 0 : krb5_errx(context, 1, N_("unrecognized enctype: %s", ""),
156 : etype_str);
157 0 : krb5_get_creds_opt_set_enctype(context, opt, enctype);
158 : }
159 :
160 12 : if (impersonate_str) {
161 3 : ret = krb5_parse_name(context, impersonate_str, &impersonate);
162 3 : if (ret)
163 0 : krb5_err(context, 1, ret, "krb5_parse_name %s", impersonate_str);
164 3 : krb5_get_creds_opt_set_impersonate(context, opt, impersonate);
165 3 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
166 3 : krb5_free_principal(context, impersonate);
167 : }
168 :
169 12 : if (out_cache_str)
170 9 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
171 :
172 12 : if (forwardable_flag)
173 6 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
174 12 : if (!transit_flag)
175 0 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_TRANSIT_CHECK);
176 12 : if (canonicalize_flag)
177 0 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_CANONICALIZE);
178 12 : if (!store_flag)
179 0 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
180 12 : if (cached_only_flag)
181 0 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_CACHED);
182 12 : if (anonymous_flag)
183 0 : krb5_get_creds_opt_add_options(context, opt, KRB5_GC_ANONYMOUS);
184 :
185 12 : if (delegation_cred_str) {
186 : krb5_ccache id;
187 : krb5_creds c, mc;
188 : Ticket ticket;
189 :
190 6 : krb5_cc_clear_mcred(&mc);
191 6 : ret = krb5_cc_get_principal(context, cache, &mc.server);
192 6 : if (ret)
193 0 : krb5_err(context, 1, ret, "krb5_cc_get_principal");
194 :
195 6 : ret = krb5_cc_resolve(context, delegation_cred_str, &id);
196 6 : if(ret)
197 0 : krb5_err(context, 1, ret, "krb5_cc_resolve");
198 :
199 6 : ret = krb5_cc_retrieve_cred(context, id, 0, &mc, &c);
200 6 : if(ret)
201 0 : krb5_err(context, 1, ret, "krb5_cc_retrieve_cred");
202 :
203 6 : ret = decode_Ticket(c.ticket.data, c.ticket.length, &ticket, NULL);
204 6 : if (ret) {
205 0 : krb5_clear_error_message(context);
206 0 : krb5_err(context, 1, ret, "decode_Ticket");
207 : }
208 6 : krb5_free_cred_contents(context, &c);
209 :
210 6 : ret = krb5_get_creds_opt_set_ticket(context, opt, &ticket);
211 6 : if(ret)
212 0 : krb5_err(context, 1, ret, "krb5_get_creds_opt_set_ticket");
213 6 : free_Ticket(&ticket);
214 :
215 6 : krb5_cc_close(context, id);
216 6 : krb5_free_principal(context, mc.server);
217 :
218 6 : krb5_get_creds_opt_add_options(context, opt,
219 : KRB5_GC_CONSTRAINED_DELEGATION);
220 : }
221 :
222 12 : if (nametype_str != NULL) {
223 0 : ret = krb5_parse_nametype(context, nametype_str, &nametype);
224 0 : if (ret)
225 0 : krb5_err(context, 1, ret, "krb5_parse_nametype");
226 : }
227 :
228 12 : if (nametype == KRB5_NT_SRV_HST ||
229 12 : nametype == KRB5_NT_SRV_HST_NEEDS_CANON)
230 0 : is_hostbased_flag = 1;
231 :
232 12 : if (is_hostbased_flag) {
233 0 : const char *sname = NULL;
234 0 : const char *hname = NULL;
235 :
236 0 : if (nametype_str != NULL &&
237 0 : nametype != KRB5_NT_SRV_HST &&
238 0 : nametype != KRB5_NT_SRV_HST_NEEDS_CANON)
239 0 : krb5_errx(context, 1, "--hostbased not compatible with "
240 : "non-hostbased --name-type");
241 :
242 0 : if (is_canonical_flag)
243 0 : nametype = KRB5_NT_SRV_HST;
244 : else
245 0 : nametype = KRB5_NT_SRV_HST_NEEDS_CANON;
246 :
247 : /*
248 : * Host-based service names can have more than one component.
249 : *
250 : * RFC5179 did not, but should have, assign a Kerberos name-type
251 : * corresponding to GSS_C_NT_DOMAINBASED. But it's basically a
252 : * host-based service name type with one additional component.
253 : *
254 : * So that's how we're treating host-based service names here:
255 : * two or more components.
256 : */
257 :
258 0 : if (argc == 0) {
259 0 : usage(1);
260 0 : } else if (argc == 1) {
261 : krb5_principal server2;
262 :
263 : /*
264 : * In this case the one argument is a principal name, not the
265 : * service name.
266 : *
267 : * We parse the argument as a principal name, extract the service
268 : * and hostname components, use krb5_sname_to_principal(), then
269 : * extract the service and hostname components from that.
270 : */
271 :
272 0 : ret = krb5_parse_name(context, argv[0], &server);
273 0 : if (ret)
274 0 : krb5_err(context, 1, ret, "krb5_parse_name %s", argv[0]);
275 0 : sname = krb5_principal_get_comp_string(context, server, 0);
276 :
277 : /*
278 : * If a single-component principal name is given, then we'll
279 : * default the hostname, as krb5_principal_get_comp_string()
280 : * returns NULL in this case.
281 : */
282 0 : hname = krb5_principal_get_comp_string(context, server, 1);
283 :
284 0 : ret = krb5_sname_to_principal(context, hname, sname,
285 : KRB5_NT_SRV_HST, &server2);
286 0 : if (ret)
287 0 : krb5_err(context, 1, ret, "krb5_sname_to_principal %s %s",
288 : sname, hname);
289 0 : sname = krb5_principal_get_comp_string(context, server2, 0);
290 0 : hname = krb5_principal_get_comp_string(context, server2, 1);
291 :
292 : /*
293 : * Modify the original with the new sname/hname. This way we
294 : * retain any additional principal name components from the given
295 : * principal name.
296 : *
297 : * The name-type is set further below.
298 : */
299 0 : ret = krb5_principal_set_comp_string(context, server, 0, sname);
300 0 : if (ret)
301 0 : krb5_err(context, 1, ret, "krb5_principal_set_comp_string %s", argv[0]);
302 0 : ret = krb5_principal_set_comp_string(context, server, 1, hname);
303 0 : if (ret)
304 0 : krb5_err(context, 1, ret, "krb5_principal_set_comp_string %s", argv[0]);
305 0 : krb5_free_principal(context, server2);
306 : } else {
307 : size_t i;
308 :
309 : /*
310 : * In this case the arguments are principal name components.
311 : *
312 : * The service and hostname components can be defaulted by passing
313 : * empty strings.
314 : */
315 0 : sname = argv[0];
316 0 : if (*sname == '\0')
317 0 : sname = NULL;
318 0 : hname = argv[1];
319 0 : if (hname == NULL || *hname == '\0')
320 0 : hname = NULL;
321 0 : ret = krb5_sname_to_principal(context, hname, sname,
322 : KRB5_NT_SRV_HST, &server);
323 0 : if (ret)
324 0 : krb5_err(context, 1, ret, "krb5_sname_to_principal");
325 :
326 0 : for (i = 2; i < argc; i++) {
327 0 : ret = krb5_principal_set_comp_string(context, server, i, argv[i]);
328 0 : if (ret)
329 0 : krb5_err(context, 1, ret, "krb5_principal_set_comp_string");
330 : }
331 : }
332 12 : } else if (argc == 1) {
333 12 : ret = krb5_parse_name(context, argv[0], &server);
334 12 : if (ret)
335 0 : krb5_err(context, 1, ret, "krb5_parse_name %s", argv[0]);
336 : } else {
337 0 : usage(1);
338 : }
339 :
340 12 : if (nametype != KRB5_NT_UNKNOWN)
341 0 : server->name.name_type = (NAME_TYPE)nametype;
342 :
343 12 : ret = krb5_get_creds(context, opt, cache, server, &out);
344 12 : if (ret)
345 2 : krb5_err(context, 1, ret, "krb5_get_creds");
346 :
347 10 : if (out_cache_str) {
348 : krb5_ccache id;
349 :
350 7 : ret = krb5_cc_resolve(context, out_cache_str, &id);
351 7 : if(ret)
352 0 : krb5_err(context, 1, ret, "krb5_cc_resolve");
353 :
354 7 : ret = krb5_cc_initialize(context, id, out->client);
355 7 : if(ret)
356 0 : krb5_err(context, 1, ret, "krb5_cc_initialize");
357 :
358 7 : ret = krb5_cc_store_cred(context, id, out);
359 7 : if(ret)
360 0 : krb5_err(context, 1, ret, "krb5_cc_store_cred");
361 7 : krb5_cc_close(context, id);
362 : }
363 :
364 10 : krb5_free_creds(context, out);
365 10 : krb5_free_principal(context, server);
366 10 : krb5_get_creds_opt_free(context, opt);
367 10 : krb5_cc_close (context, cache);
368 10 : krb5_free_context (context);
369 :
370 10 : return 0;
371 : }
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