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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;
83 * Task used for proof-of-work calculation.
85 static struct GNUNET_SCHEDULER_Task *pow_task;
89 * Function run if the user aborts with CTRL-C.
94 do_shutdown (void *cls)
98 GNUNET_IDENTITY_ego_lookup_cancel (el);
103 GNUNET_REVOCATION_query_cancel (q);
108 GNUNET_REVOCATION_revoke_cancel (h);
115 * Print the result from a revocation query.
118 * @param is_valid #GNUNET_YES if the key is still valid, #GNUNET_NO if not, #GNUNET_SYSERR on error
121 print_query_result (void *cls,
129 _("Key `%s' is valid\n"),
134 _("Key `%s' has been revoked\n"),
140 _("Internal error\n"));
146 GNUNET_SCHEDULER_shutdown ();
151 * Print the result from a revocation request.
154 * @param is_valid #GNUNET_YES if the key is still valid, #GNUNET_NO if not, #GNUNET_SYSERR on error
157 print_revocation_result (void *cls,
164 if (NULL != revoke_ego)
166 _("Key for ego `%s' is still valid, revocation failed (!)\n"),
171 _("Revocation failed (!)\n"));
174 if (NULL != revoke_ego)
176 _("Key for ego `%s' has been successfully revoked\n"),
181 _("Revocation successful.\n"));
186 _("Internal error, key revocation might have failed\n"));
192 GNUNET_SCHEDULER_shutdown ();
197 * Data needed to perform a revocation.
199 struct RevocationData
204 struct GNUNET_CRYPTO_EcdsaPublicKey key;
207 * Revocation signature data.
209 struct GNUNET_CRYPTO_EcdsaSignature sig;
212 * Proof of work (in NBO).
214 uint64_t pow GNUNET_PACKED;
219 * Perform the revocation.
222 perform_revocation (const struct RevocationData *rd)
224 h = GNUNET_REVOCATION_revoke (cfg,
228 &print_revocation_result,
234 * Write the current state of the revocation data
237 * @param rd data to sync
240 sync_rd (const struct RevocationData *rd)
242 if ( (NULL != filename) &&
243 (sizeof (struct RevocationData) ==
244 GNUNET_DISK_fn_write (filename,
247 GNUNET_DISK_PERM_USER_READ |
248 GNUNET_DISK_PERM_USER_WRITE)) )
249 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
256 * Perform the proof-of-work calculation.
258 * @param cls the `struct RevocationData`
261 calculate_pow_shutdown (void *cls)
263 struct RevocationData *rd = cls;
265 if (NULL != pow_task)
267 GNUNET_SCHEDULER_cancel (pow_task);
276 * Perform the proof-of-work calculation.
278 * @param cls the `struct RevocationData`
281 calculate_pow (void *cls)
283 struct RevocationData *rd = cls;
285 /* store temporary results */
286 if (0 == (rd->pow % 128))
288 /* display progress estimate */
289 if ( (0 == ((1 << matching_bits) / 100 / 50)) ||
290 (0 == (rd->pow % ((1 << matching_bits) / 100 / 50))) )
291 FPRINTF (stderr, "%s", ".");
292 if ( (0 != rd->pow) &&
293 ( (0 == ((1 << matching_bits) / 100)) ||
294 (0 == (rd->pow % ((1 << matching_bits) / 100))) ) )
295 FPRINTF (stderr, " - @ %3u%% (estimate)\n",
296 (unsigned int) (rd->pow * 100) / (1 << matching_bits));
297 /* actually do POW calculation */
300 GNUNET_REVOCATION_check_pow (&rd->key,
302 (unsigned int) matching_bits))
304 if ( (NULL != filename) &&
305 (sizeof (struct RevocationData) !=
306 GNUNET_DISK_fn_write (filename,
308 sizeof (struct RevocationData),
309 GNUNET_DISK_PERM_USER_READ |
310 GNUNET_DISK_PERM_USER_WRITE)) )
311 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
315 perform_revocation (rd);
318 FPRINTF (stderr, "%s", "\n");
320 _("Revocation certificate for `%s' stored in `%s'\n"),
323 GNUNET_SCHEDULER_shutdown ();
328 pow_task = GNUNET_SCHEDULER_add_now (&calculate_pow,
334 * Function called with the result from the ego lookup.
337 * @param ego the ego, NULL if not found
340 ego_callback (void *cls,
341 const struct GNUNET_IDENTITY_Ego *ego)
343 struct RevocationData *rd;
344 struct GNUNET_CRYPTO_EcdsaPublicKey key;
350 _("Ego `%s' not found.\n"),
352 GNUNET_SCHEDULER_shutdown ();
355 GNUNET_IDENTITY_ego_get_public_key (ego,
357 rd = GNUNET_new (struct RevocationData);
358 if ( (NULL != filename) &&
360 GNUNET_DISK_file_test (filename)) &&
361 (sizeof (struct RevocationData) ==
362 GNUNET_DISK_fn_read (filename,
364 sizeof (struct RevocationData))) )
366 if (0 != memcmp (&rd->key,
368 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)))
371 _("Error: revocation certificate in `%s' is not for `%s'\n"),
380 GNUNET_REVOCATION_sign_revocation (GNUNET_IDENTITY_ego_get_private_key (ego),
385 GNUNET_REVOCATION_check_pow (&key,
387 (unsigned int) matching_bits))
391 _("Revocation certificate ready\n"));
393 perform_revocation (rd);
395 GNUNET_SCHEDULER_shutdown ();
401 _("Revocation certificate not ready, calculating proof of work\n"));
402 pow_task = GNUNET_SCHEDULER_add_now (&calculate_pow,
404 GNUNET_SCHEDULER_add_shutdown (&calculate_pow_shutdown,
410 * Main function that will be run by the scheduler.
413 * @param args remaining command-line arguments
414 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
415 * @param c configuration
421 const struct GNUNET_CONFIGURATION_Handle *c)
423 struct GNUNET_CRYPTO_EcdsaPublicKey pk;
424 struct RevocationData rd;
427 if (NULL != test_ego)
430 GNUNET_CRYPTO_ecdsa_public_key_from_string (test_ego,
435 _("Public key `%s' malformed\n"),
439 GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
441 q = GNUNET_REVOCATION_query (cfg,
445 if (NULL != revoke_ego)
448 _("Testing and revoking at the same time is not allowed, only executing test.\n"));
452 GNUNET_CONFIGURATION_get_value_number (cfg,
457 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
462 if (NULL != revoke_ego)
464 if ( !perform && (NULL == filename) )
468 _("No filename to store revocation certificate given.\n"));
472 el = GNUNET_IDENTITY_ego_lookup (cfg,
476 GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
480 if ( (NULL != filename) &&
484 GNUNET_DISK_fn_read (filename,
489 _("Failed to read revocation certificate from `%s'\n"),
493 GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
496 GNUNET_REVOCATION_check_pow (&rd.key,
498 (unsigned int) matching_bits))
500 struct RevocationData *cp = GNUNET_new (struct RevocationData);
503 pow_task = GNUNET_SCHEDULER_add_now (&calculate_pow,
505 GNUNET_SCHEDULER_add_shutdown (&calculate_pow_shutdown,
509 perform_revocation (&rd);
514 _("No action specified. Nothing to do.\n"));
519 * The main function of gnunet-revocation.
521 * @param argc number of arguments from the command line
522 * @param argv command line arguments
523 * @return 0 ok, 1 on error
526 main (int argc, char *const *argv)
528 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
529 {'f', "filename", "NAME",
530 gettext_noop ("use NAME for the name of the revocation file"),
531 1, &GNUNET_GETOPT_set_string, &filename},
532 {'R', "revoke", "NAME",
533 gettext_noop ("revoke the private key associated for the the private key associated with the ego NAME "),
534 1, &GNUNET_GETOPT_set_string, &revoke_ego},
535 {'p', "perform", NULL,
536 gettext_noop ("actually perform revocation, otherwise we just do the precomputation"),
537 0, &GNUNET_GETOPT_set_one, &perform},
539 gettext_noop ("test if the public key KEY has been revoked"),
540 1, &GNUNET_GETOPT_set_string, &test_ego},
541 GNUNET_GETOPT_OPTION_END
543 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
547 GNUNET_PROGRAM_run (argc, argv, "gnunet-revocation",
548 gettext_noop ("help text"), options, &run,
550 GNUNET_free ((void*) argv);
554 /* end of gnunet-revocation.c */