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22 * @file revocation/gnunet-revocation.c
23 * @brief tool for revoking public keys
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_revocation_service.h"
29 #include "gnunet_identity_service.h"
45 static char *filename;
50 static char *revoke_ego;
55 static char *test_ego;
58 * Handle for revocation query.
60 static struct GNUNET_REVOCATION_Query *q;
63 * Handle for revocation.
65 static struct GNUNET_REVOCATION_Handle *h;
68 * Handle for our ego lookup.
70 static struct GNUNET_IDENTITY_EgoLookup *el;
75 static const struct GNUNET_CONFIGURATION_Handle *cfg;
78 * Number of matching bits required for revocation.
80 static unsigned long long matching_bits;
84 * Function run if the user aborts with CTRL-C.
89 do_shutdown (void *cls)
93 GNUNET_IDENTITY_ego_lookup_cancel (el);
98 GNUNET_REVOCATION_query_cancel (q);
103 GNUNET_REVOCATION_revoke_cancel (h);
110 * Print the result from a revocation query.
113 * @param is_valid #GNUNET_YES if the key is still valid, #GNUNET_NO if not, #GNUNET_SYSERR on error
116 print_query_result (void *cls,
124 _("Key `%s' is valid\n"),
129 _("Key `%s' has been revoked\n"),
135 _("Internal error\n"));
141 GNUNET_SCHEDULER_shutdown ();
146 * Print the result from a revocation request.
149 * @param is_valid #GNUNET_YES if the key is still valid, #GNUNET_NO if not, #GNUNET_SYSERR on error
152 print_revocation_result (void *cls,
159 if (NULL != revoke_ego)
161 _("Key for ego `%s' is still valid, revocation failed (!)\n"),
166 _("Revocation failed (!)\n"));
169 if (NULL != revoke_ego)
171 _("Key for ego `%s' has been successfully revoked\n"),
176 _("Revocation successful.\n"));
181 _("Internal error, key revocation might have failed\n"));
187 GNUNET_SCHEDULER_shutdown ();
192 * Data needed to perform a revocation.
194 struct RevocationData
199 struct GNUNET_CRYPTO_EcdsaPublicKey key;
202 * Revocation signature data.
204 struct GNUNET_CRYPTO_EcdsaSignature sig;
207 * Proof of work (in NBO).
209 uint64_t pow GNUNET_PACKED;
214 * Perform the revocation.
217 perform_revocation (const struct RevocationData *rd)
219 h = GNUNET_REVOCATION_revoke (cfg,
223 &print_revocation_result,
229 * Perform the proof-of-work calculation.
231 * @param cls the `struct RevocationData`
234 calculate_pow (void *cls)
236 struct RevocationData *rd = cls;
237 const struct GNUNET_SCHEDULER_TaskContext *tc;
239 /* store temporary results */
240 tc = GNUNET_SCHEDULER_get_task_context ();
241 if ( (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason)) ||
242 (0 == (rd->pow % 128) ) )
244 if ( (NULL != filename) &&
245 (sizeof (struct RevocationData) ==
246 GNUNET_DISK_fn_write (filename,
249 GNUNET_DISK_PERM_USER_READ |
250 GNUNET_DISK_PERM_USER_WRITE)) )
251 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
255 /* display progress estimate */
256 if ( (0 == ((1 << matching_bits) / 100 / 50)) ||
257 (0 == (rd->pow % ((1 << matching_bits) / 100 / 50))) )
258 FPRINTF (stderr, "%s", ".");
259 if ( (0 != rd->pow) &&
260 ( (0 == ((1 << matching_bits) / 100)) ||
261 (0 == (rd->pow % ((1 << matching_bits) / 100))) ) )
262 FPRINTF (stderr, " - @ %3u%% (estimate)\n",
263 (unsigned int) (rd->pow * 100) / (1 << matching_bits));
264 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
269 /* actually do POW calculation */
272 GNUNET_REVOCATION_check_pow (&rd->key,
274 (unsigned int) matching_bits))
276 if ( (NULL != filename) &&
277 (sizeof (struct RevocationData) !=
278 GNUNET_DISK_fn_write (filename,
280 sizeof (struct RevocationData),
281 GNUNET_DISK_PERM_USER_READ |
282 GNUNET_DISK_PERM_USER_WRITE)) )
283 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
287 perform_revocation (rd);
290 FPRINTF (stderr, "%s", "\n");
292 _("Revocation certificate for `%s' stored in `%s'\n"),
295 GNUNET_SCHEDULER_shutdown ();
300 GNUNET_SCHEDULER_add_now (&calculate_pow,
306 * Function called with the result from the ego lookup.
309 * @param ego the ego, NULL if not found
312 ego_callback (void *cls,
313 const struct GNUNET_IDENTITY_Ego *ego)
315 struct RevocationData *rd;
316 struct GNUNET_CRYPTO_EcdsaPublicKey key;
322 _("Ego `%s' not found.\n"),
324 GNUNET_SCHEDULER_shutdown ();
327 GNUNET_IDENTITY_ego_get_public_key (ego,
329 rd = GNUNET_new (struct RevocationData);
330 if ( (NULL != filename) &&
332 GNUNET_DISK_file_test (filename)) &&
333 (sizeof (struct RevocationData) ==
334 GNUNET_DISK_fn_read (filename,
336 sizeof (struct RevocationData))) )
338 if (0 != memcmp (&rd->key,
340 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)))
343 _("Error: revocation certificate in `%s' is not for `%s'\n"),
352 GNUNET_REVOCATION_sign_revocation (GNUNET_IDENTITY_ego_get_private_key (ego),
357 GNUNET_REVOCATION_check_pow (&key,
359 (unsigned int) matching_bits))
363 _("Revocation certificate ready\n"));
365 perform_revocation (rd);
367 GNUNET_SCHEDULER_shutdown ();
373 _("Revocation certificate not ready, calculating proof of work\n"));
374 GNUNET_SCHEDULER_add_now (&calculate_pow,
380 * Main function that will be run by the scheduler.
383 * @param args remaining command-line arguments
384 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
385 * @param c configuration
391 const struct GNUNET_CONFIGURATION_Handle *c)
393 struct GNUNET_CRYPTO_EcdsaPublicKey pk;
394 struct RevocationData rd;
397 if (NULL != test_ego)
400 GNUNET_CRYPTO_ecdsa_public_key_from_string (test_ego,
405 _("Public key `%s' malformed\n"),
409 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
412 q = GNUNET_REVOCATION_query (cfg,
416 if (NULL != revoke_ego)
419 _("Testing and revoking at the same time is not allowed, only executing test.\n"));
423 GNUNET_CONFIGURATION_get_value_number (cfg,
428 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
433 if (NULL != revoke_ego)
435 if ( !perform && (NULL == filename) )
439 _("No filename to store revocation certificate given.\n"));
443 el = GNUNET_IDENTITY_ego_lookup (cfg,
447 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
452 if ( (NULL != filename) &&
456 GNUNET_DISK_fn_read (filename,
461 _("Failed to read revocation certificate from `%s'\n"),
465 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
469 GNUNET_REVOCATION_check_pow (&rd.key,
471 (unsigned int) matching_bits))
473 struct RevocationData *cp = GNUNET_new (struct RevocationData);
476 GNUNET_SCHEDULER_add_now (&calculate_pow,
481 perform_revocation (&rd);
486 _("No action specified. Nothing to do.\n"));
491 * The main function of gnunet-revocation.
493 * @param argc number of arguments from the command line
494 * @param argv command line arguments
495 * @return 0 ok, 1 on error
498 main (int argc, char *const *argv)
500 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
501 {'f', "filename", "NAME",
502 gettext_noop ("use NAME for the name of the revocation file"),
503 1, &GNUNET_GETOPT_set_string, &filename},
504 {'R', "revoke", "NAME",
505 gettext_noop ("revoke the private key associated for the the private key associated with the ego NAME "),
506 1, &GNUNET_GETOPT_set_string, &revoke_ego},
507 {'p', "perform", NULL,
508 gettext_noop ("actually perform revocation, otherwise we just do the precomputation"),
509 0, &GNUNET_GETOPT_set_one, &perform},
511 gettext_noop ("test if the public key KEY has been revoked"),
512 1, &GNUNET_GETOPT_set_string, &test_ego},
513 GNUNET_GETOPT_OPTION_END
515 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
519 GNUNET_PROGRAM_run (argc, argv, "gnunet-revocation",
520 gettext_noop ("help text"), options, &run,
522 GNUNET_free ((void*) argv);
526 /* end of gnunet-revocation.c */