source: heimdal/trunk/kdc/hprop.c

Last change on this file was 1, checked in by Paul Smedley, 10 years ago

Initial commit of Heimdal 1.5.3
File size: 12.2 KB
Line 
1/*
2 * Copyright (c) 1997 - 2005 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#define KRB5_DEPRECATED /* uses v4 functions that will die */
35
36#include "hprop.h"
37
38static int version_flag;
39static int help_flag;
40static const char *ktname = HPROP_KEYTAB;
41static const char *database;
42static char *mkeyfile;
43static int to_stdout;
44static int verbose_flag;
45static int encrypt_flag;
46static int decrypt_flag;
47static hdb_master_key mkey5;
48
49static char *source_type;
50
51static char *local_realm=NULL;
52
53static int
54open_socket(krb5_context context, const char *hostname, const char *port)
55{
56 struct addrinfo *ai, *a;
57 struct addrinfo hints;
58 int error;
59
60 memset (&hints, 0, sizeof(hints));
61 hints.ai_socktype = SOCK_STREAM;
62 hints.ai_protocol = IPPROTO_TCP;
63
64 error = getaddrinfo (hostname, port, &hints, &ai);
65 if (error) {
66 warnx ("%s: %s", hostname, gai_strerror(error));
67 return -1;
68 }
69
70 for (a = ai; a != NULL; a = a->ai_next) {
71 int s;
72
73 s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
74 if (s < 0)
75 continue;
76 if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
77 warn ("connect(%s)", hostname);
78 close (s);
79 continue;
80 }
81 freeaddrinfo (ai);
82 return s;
83 }
84 warnx ("failed to contact %s", hostname);
85 freeaddrinfo (ai);
86 return -1;
87}
88
89krb5_error_code
90v5_prop(krb5_context context, HDB *db, hdb_entry_ex *entry, void *appdata)
91{
92 krb5_error_code ret;
93 struct prop_data *pd = appdata;
94 krb5_data data;
95
96 if(encrypt_flag) {
97 ret = hdb_seal_keys_mkey(context, &entry->entry, mkey5);
98 if (ret) {
99 krb5_warn(context, ret, "hdb_seal_keys_mkey");
100 return ret;
101 }
102 }
103 if(decrypt_flag) {
104 ret = hdb_unseal_keys_mkey(context, &entry->entry, mkey5);
105 if (ret) {
106 krb5_warn(context, ret, "hdb_unseal_keys_mkey");
107 return ret;
108 }
109 }
110
111 ret = hdb_entry2value(context, &entry->entry, &data);
112 if(ret) {
113 krb5_warn(context, ret, "hdb_entry2value");
114 return ret;
115 }
116
117 if(to_stdout)
118 ret = krb5_write_message(context, &pd->sock, &data);
119 else
120 ret = krb5_write_priv_message(context, pd->auth_context,
121 &pd->sock, &data);
122 krb5_data_free(&data);
123 return ret;
124}
125
126struct getargs args[] = {
127 { "master-key", 'm', arg_string, &mkeyfile, "v5 master key file", "file" },
128 { "database", 'd', arg_string, rk_UNCONST(&database), "database", "file" },
129 { "source", 0, arg_string, &source_type, "type of database to read",
130 "heimdal"
131 "|mit-dump"
132 },
133
134 { "keytab", 'k', arg_string, rk_UNCONST(&ktname),
135 "keytab to use for authentication", "keytab" },
136 { "v5-realm", 'R', arg_string, &local_realm, "v5 realm to use", NULL },
137 { "decrypt", 'D', arg_flag, &decrypt_flag, "decrypt keys", NULL },
138 { "encrypt", 'E', arg_flag, &encrypt_flag, "encrypt keys", NULL },
139 { "stdout", 'n', arg_flag, &to_stdout, "dump to stdout", NULL },
140 { "verbose", 'v', arg_flag, &verbose_flag, NULL, NULL },
141 { "version", 0, arg_flag, &version_flag, NULL, NULL },
142 { "help", 'h', arg_flag, &help_flag, NULL, NULL }
143};
144
145static int num_args = sizeof(args) / sizeof(args[0]);
146
147static void
148usage(int ret)
149{
150 arg_printusage (args, num_args, NULL, "[host[:port]] ...");
151 exit (ret);
152}
153
154static void
155get_creds(krb5_context context, krb5_ccache *cache)
156{
157 krb5_keytab keytab;
158 krb5_principal client;
159 krb5_error_code ret;
160 krb5_get_init_creds_opt *init_opts;
161 krb5_preauthtype preauth = KRB5_PADATA_ENC_TIMESTAMP;
162 krb5_creds creds;
163
164 ret = krb5_kt_register(context, &hdb_kt_ops);
165 if(ret) krb5_err(context, 1, ret, "krb5_kt_register");
166
167 ret = krb5_kt_resolve(context, ktname, &keytab);
168 if(ret) krb5_err(context, 1, ret, "krb5_kt_resolve");
169
170 ret = krb5_make_principal(context, &client, NULL,
171 "kadmin", HPROP_NAME, NULL);
172 if(ret) krb5_err(context, 1, ret, "krb5_make_principal");
173
174 ret = krb5_get_init_creds_opt_alloc(context, &init_opts);
175 if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
176 krb5_get_init_creds_opt_set_preauth_list(init_opts, &preauth, 1);
177
178 ret = krb5_get_init_creds_keytab(context, &creds, client, keytab, 0, NULL, init_opts);
179 if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
180
181 krb5_get_init_creds_opt_free(context, init_opts);
182
183 ret = krb5_kt_close(context, keytab);
184 if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
185
186 ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, cache);
187 if(ret) krb5_err(context, 1, ret, "krb5_cc_new_unique");
188
189 ret = krb5_cc_initialize(context, *cache, client);
190 if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
191
192 krb5_free_principal(context, client);
193
194 ret = krb5_cc_store_cred(context, *cache, &creds);
195 if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
196
197 krb5_free_cred_contents(context, &creds);
198}
199
200enum hprop_source {
201 HPROP_HEIMDAL = 1,
202 HPROP_MIT_DUMP
203};
204
205struct {
206 int type;
207 const char *name;
208} types[] = {
209 { HPROP_HEIMDAL, "heimdal" },
210 { HPROP_MIT_DUMP, "mit-dump" }
211};
212
213static int
214parse_source_type(const char *s)
215{
216 size_t i;
217 for(i = 0; i < sizeof(types) / sizeof(types[0]); i++) {
218 if(strstr(types[i].name, s) == types[i].name)
219 return types[i].type;
220 }
221 return 0;
222}
223
224static int
225iterate (krb5_context context,
226 const char *database_name,
227 HDB *db,
228 int type,
229 struct prop_data *pd)
230{
231 int ret;
232
233 switch(type) {
234 case HPROP_MIT_DUMP:
235 ret = mit_prop_dump(pd, database_name);
236 if (ret)
237 krb5_warn(context, ret, "mit_prop_dump");
238 break;
239 case HPROP_HEIMDAL:
240 ret = hdb_foreach(context, db, HDB_F_DECRYPT, v5_prop, pd);
241 if(ret)
242 krb5_warn(context, ret, "hdb_foreach");
243 break;
244 default:
245 krb5_errx(context, 1, "unknown prop type: %d", type);
246 }
247 return ret;
248}
249
250static int
251dump_database (krb5_context context, int type,
252 const char *database_name, HDB *db)
253{
254 krb5_error_code ret;
255 struct prop_data pd;
256 krb5_data data;
257
258 pd.context = context;
259 pd.auth_context = NULL;
260 pd.sock = STDOUT_FILENO;
261
262 ret = iterate (context, database_name, db, type, &pd);
263 if (ret)
264 krb5_errx(context, 1, "iterate failure");
265 krb5_data_zero (&data);
266 ret = krb5_write_message (context, &pd.sock, &data);
267 if (ret)
268 krb5_err(context, 1, ret, "krb5_write_message");
269
270 return 0;
271}
272
273static int
274propagate_database (krb5_context context, int type,
275 const char *database_name,
276 HDB *db, krb5_ccache ccache,
277 int optidx, int argc, char **argv)
278{
279 krb5_principal server;
280 krb5_error_code ret;
281 int i, failed = 0;
282
283 for(i = optidx; i < argc; i++){
284 krb5_auth_context auth_context;
285 int fd;
286 struct prop_data pd;
287 krb5_data data;
288
289 char *port, portstr[NI_MAXSERV];
290 char *host = argv[i];
291
292 port = strchr(host, ':');
293 if(port == NULL) {
294 snprintf(portstr, sizeof(portstr), "%u",
295 ntohs(krb5_getportbyname (context, "hprop", "tcp",
296 HPROP_PORT)));
297 port = portstr;
298 } else
299 *port++ = '\0';
300
301 fd = open_socket(context, host, port);
302 if(fd < 0) {
303 failed++;
304 krb5_warn (context, errno, "connect %s", host);
305 continue;
306 }
307
308 ret = krb5_sname_to_principal(context, argv[i],
309 HPROP_NAME, KRB5_NT_SRV_HST, &server);
310 if(ret) {
311 failed++;
312 krb5_warn(context, ret, "krb5_sname_to_principal(%s)", host);
313 close(fd);
314 continue;
315 }
316
317 if (local_realm) {
318 krb5_realm my_realm;
319 krb5_get_default_realm(context,&my_realm);
320 krb5_principal_set_realm(context,server,my_realm);
321 krb5_xfree(my_realm);
322 }
323
324 auth_context = NULL;
325 ret = krb5_sendauth(context,
326 &auth_context,
327 &fd,
328 HPROP_VERSION,
329 NULL,
330 server,
331 AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_USE_SUBKEY,
332 NULL, /* in_data */
333 NULL, /* in_creds */
334 ccache,
335 NULL,
336 NULL,
337 NULL);
338
339 krb5_free_principal(context, server);
340
341 if(ret) {
342 failed++;
343 krb5_warn(context, ret, "krb5_sendauth (%s)", host);
344 close(fd);
345 goto next_host;
346 }
347
348 pd.context = context;
349 pd.auth_context = auth_context;
350 pd.sock = fd;
351
352 ret = iterate (context, database_name, db, type, &pd);
353 if (ret) {
354 krb5_warnx(context, "iterate to host %s failed", host);
355 failed++;
356 goto next_host;
357 }
358
359 krb5_data_zero (&data);
360 ret = krb5_write_priv_message(context, auth_context, &fd, &data);
361 if(ret) {
362 krb5_warn(context, ret, "krb5_write_priv_message");
363 failed++;
364 goto next_host;
365 }
366
367 ret = krb5_read_priv_message(context, auth_context, &fd, &data);
368 if(ret) {
369 krb5_warn(context, ret, "krb5_read_priv_message: %s", host);
370 failed++;
371 goto next_host;
372 } else
373 krb5_data_free (&data);
374
375 next_host:
376 krb5_auth_con_free(context, auth_context);
377 close(fd);
378 }
379 if (failed)
380 return 1;
381 return 0;
382}
383
384int
385main(int argc, char **argv)
386{
387 krb5_error_code ret;
388 krb5_context context;
389 krb5_ccache ccache = NULL;
390 HDB *db = NULL;
391 int optidx = 0;
392
393 int type, exit_code;
394
395 setprogname(argv[0]);
396
397 if(getarg(args, num_args, argc, argv, &optidx))
398 usage(1);
399
400 if(help_flag)
401 usage(0);
402
403 if(version_flag){
404 print_version(NULL);
405 exit(0);
406 }
407
408 ret = krb5_init_context(&context);
409 if(ret)
410 exit(1);
411
412 /* We may be reading an old database encrypted with a DES master key. */
413 ret = krb5_allow_weak_crypto(context, 1);
414 if(ret)
415 krb5_err(context, 1, ret, "krb5_allow_weak_crypto");
416
417 if(local_realm)
418 krb5_set_default_realm(context, local_realm);
419
420 if(encrypt_flag && decrypt_flag)
421 krb5_errx(context, 1,
422 "only one of `--encrypt' and `--decrypt' is meaningful");
423
424 if(source_type != NULL) {
425 type = parse_source_type(source_type);
426 if(type == 0)
427 krb5_errx(context, 1, "unknown source type `%s'", source_type);
428 } else
429 type = HPROP_HEIMDAL;
430
431 if(!to_stdout)
432 get_creds(context, &ccache);
433
434 if(decrypt_flag || encrypt_flag) {
435 ret = hdb_read_master_key(context, mkeyfile, &mkey5);
436 if(ret && ret != ENOENT)
437 krb5_err(context, 1, ret, "hdb_read_master_key");
438 if(ret)
439 krb5_errx(context, 1, "No master key file found");
440 }
441
442 switch(type) {
443 case HPROP_MIT_DUMP:
444 if (database == NULL)
445 krb5_errx(context, 1, "no dump file specified");
446 break;
447 case HPROP_HEIMDAL:
448 ret = hdb_create (context, &db, database);
449 if(ret)
450 krb5_err(context, 1, ret, "hdb_create: %s", database);
451 ret = db->hdb_open(context, db, O_RDONLY, 0);
452 if(ret)
453 krb5_err(context, 1, ret, "db->hdb_open");
454 break;
455 default:
456 krb5_errx(context, 1, "unknown dump type `%d'", type);
457 break;
458 }
459
460 if (to_stdout)
461 exit_code = dump_database (context, type, database, db);
462 else
463 exit_code = propagate_database (context, type, database,
464 db, ccache, optidx, argc, argv);
465
466 if(ccache != NULL)
467 krb5_cc_destroy(context, ccache);
468
469 if(db != NULL)
470 (*db->hdb_destroy)(context, db);
471
472 krb5_free_context(context);
473 return exit_code;
474}
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