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- /*
- This file is part of GNUnet
- Copyright (C) 2014 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file secretsharing/gnunet-secretsharing-profiler.c
- * @brief profiling tool for distributed key generation and decryption
- * @author Florian Dold
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "gnunet_secretsharing_service.h"
- #include "gnunet_testbed_service.h"
- /**
- * How many peers should participate in the key generation?
- */
- static unsigned int num_peers = 3;
- /**
- * What should the threshold for then key be?
- */
- static unsigned int threshold = 2;
- /**
- * Should we try to decrypt a value after the key generation?
- */
- static int decrypt = GNUNET_NO;
- /**
- * When would we like to see the operation finished?
- */
- static struct GNUNET_TIME_Relative timeout;
- /**
- * When should dkg communication start?
- */
- static struct GNUNET_TIME_Relative delay;
- /**
- * Handles for secretsharing sessions.
- */
- static struct GNUNET_SECRETSHARING_Session **session_handles;
- static struct GNUNET_SECRETSHARING_DecryptionHandle **decrypt_handles;
- /**
- * Shares we got from the distributed key generation.
- */
- static struct GNUNET_SECRETSHARING_Share **shares;
- static struct GNUNET_SECRETSHARING_PublicKey common_pubkey;
- static unsigned int num_connected_sessions;
- static unsigned int num_connected_decrypt;
- /**
- * Handles to the running peers.
- * When peers[i] is NULL, the i-th peer has stopped.
- */
- static struct GNUNET_TESTBED_Peer **peers;
- static struct GNUNET_PeerIdentity *peer_ids;
- static unsigned int num_retrieved_peer_ids;
- static unsigned int num_generated;
- static unsigned int num_decrypted;
- static struct GNUNET_HashCode session_id;
- static unsigned int verbose;
- static struct GNUNET_SECRETSHARING_Plaintext reference_plaintext;
- static struct GNUNET_SECRETSHARING_Ciphertext ciphertext;
- static struct GNUNET_TIME_Absolute dkg_start;
- static struct GNUNET_TIME_Absolute dkg_deadline;
- static struct GNUNET_TIME_Absolute decrypt_start;
- static struct GNUNET_TIME_Absolute decrypt_deadline;
- /**
- * Connect operations, one for every peer.
- */
- static struct GNUNET_TESTBED_Operation **connect_ops;
- /**
- * Are we performing a shutdown right now?
- */
- static int in_shutdown;
- /**
- * Signature of the event handler function called by the
- * respective event controller.
- *
- * @param cls closure
- * @param event information about the event
- */
- static void
- controller_cb (void *cls,
- const struct GNUNET_TESTBED_EventInformation *event)
- {
- GNUNET_assert (0);
- }
- /**
- * Callback to be called when a service connect operation is completed
- *
- * @param cls the callback closure from functions generating an operation
- * @param op the operation that has been finished
- * @param ca_result the service handle returned from GNUNET_TESTBED_ConnectAdapter()
- * @param emsg error message in case the operation has failed; will be NULL if
- * operation has executed successfully.
- */
- static void
- session_connect_complete (void *cls,
- struct GNUNET_TESTBED_Operation *op,
- void *ca_result,
- const char *emsg)
- {
- if (NULL != emsg)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "testbed connect emsg: %s\n",
- emsg);
- GNUNET_assert (0);
- }
- num_connected_sessions++;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "dkg: session connect complete\n");
- if (num_connected_sessions == num_peers)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "dkg: all peers connected\n");
- }
- }
- /**
- * Callback to be called when a service connect operation is completed
- *
- * @param cls the callback closure from functions generating an operation
- * @param op the operation that has been finished
- * @param ca_result the service handle returned from GNUNET_TESTBED_ConnectAdapter()
- * @param emsg error message in case the operation has failed; will be NULL if
- * operation has executed successfully.
- */
- static void
- decrypt_connect_complete (void *cls,
- struct GNUNET_TESTBED_Operation *op,
- void *ca_result,
- const char *emsg)
- {
- if (NULL != emsg)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "testbed connect emsg: %s\n",
- emsg);
- GNUNET_assert (0);
- }
- num_connected_decrypt++;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "decrypt: session connect complete\n");
- if (num_connected_decrypt == num_peers)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "decrypt: all peers connected\n");
- }
- }
- /**
- * Called when a decryption has succeeded.
- *
- * @param cls Plaintext
- * @param plaintext Plaintext
- */
- static void
- decrypt_cb (void *cls,
- const struct GNUNET_SECRETSHARING_Plaintext *plaintext)
- {
- struct GNUNET_SECRETSHARING_DecryptionHandle **dhp = cls;
- unsigned int n = dhp - decrypt_handles;
- num_decrypted++;
- *dhp = NULL;
- // we should still be connected if this is called
- GNUNET_assert (NULL != connect_ops[n]);
- GNUNET_TESTBED_operation_done (connect_ops[n]);
- if (NULL == plaintext)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "decrypt failed for peer %u\n", n);
- return;
- }
- else if (0 == GNUNET_memcmp (&reference_plaintext, plaintext))
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "decrypt got correct result for peer %u\n", n);
- else
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "decrypt got wrong result for peer %u\n", n);
- if (num_decrypted == num_peers)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "every peer decrypted\n");
- GNUNET_SCHEDULER_shutdown ();
- }
- *dhp = NULL;
- }
- /**
- * Adapter function called to establish a connection to
- * a service.
- *
- * @param cls closure
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
- static void *
- decrypt_connect_adapter (void *cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- struct GNUNET_SECRETSHARING_DecryptionHandle **hp = cls;
- unsigned int n = hp - decrypt_handles;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "decrypt connect adapter, %d peers\n",
- num_peers);
- *hp = GNUNET_SECRETSHARING_decrypt (cfg, shares[n], &ciphertext,
- decrypt_start, decrypt_deadline,
- decrypt_cb,
- hp);
- return *hp;
- }
- /**
- * Adapter function called to destroy a connection to
- * a service.
- *
- * @param cls closure
- * @param op_result service handle returned from the connect adapter
- */
- static void
- decrypt_disconnect_adapter (void *cls, void *op_result)
- {
- struct GNUNET_SECRETSHARING_DecryptionHandle **dh = cls;
- unsigned int n = dh - decrypt_handles;
- GNUNET_assert (*dh == decrypt_handles[n]);
- if (NULL != *dh)
- {
- GNUNET_SECRETSHARING_decrypt_cancel (*dh);
- *dh = NULL;
- }
- GNUNET_assert (NULL != connect_ops[n]);
- connect_ops[n] = NULL;
- }
- static void
- secret_ready_cb (void *cls,
- struct GNUNET_SECRETSHARING_Share *my_share,
- struct GNUNET_SECRETSHARING_PublicKey *public_key,
- unsigned int num_ready_peers,
- const struct GNUNET_PeerIdentity *ready_peers)
- {
- struct GNUNET_SECRETSHARING_Session **sp = cls;
- unsigned int n = sp - session_handles;
- char pubkey_str[1024];
- char *ret;
- num_generated++;
- *sp = NULL;
- shares[n] = my_share;
- if (NULL == my_share)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "key generation failed for peer #%u\n",
- n);
- }
- else
- {
- ret = GNUNET_STRINGS_data_to_string (public_key, sizeof *public_key,
- pubkey_str, 1024);
- GNUNET_assert (NULL != ret);
- *ret = '\0';
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "key generation successful for peer #%u, pubkey %s\n", n,
- pubkey_str);
- /* we're the first to get the key -> store it */
- if (num_generated == 1)
- {
- common_pubkey = *public_key;
- }
- else if (0 != GNUNET_memcmp (public_key, &common_pubkey))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "generated public keys do not match\n");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- }
- // we should still be connected
- GNUNET_assert (NULL != connect_ops[n]);
- // disconnect from the service, will call the disconnect callback
- GNUNET_TESTBED_operation_done (connect_ops[n]);
- }
- /**
- * Adapter function called to establish a connection to
- * a service.
- *
- * @param cls closure
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
- static void *
- session_connect_adapter (void *cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- struct GNUNET_SECRETSHARING_Session **sp = cls;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "connect adapter, %d peers\n",
- num_peers);
- *sp = GNUNET_SECRETSHARING_create_session (cfg,
- num_peers,
- peer_ids,
- &session_id,
- dkg_start,
- dkg_deadline,
- threshold,
- &secret_ready_cb, sp);
- return *sp;
- }
- /**
- * Adapter function called to destroy a connection to
- * a service.
- *
- * @param cls closure
- * @param op_result service handle returned from the connect adapter
- */
- static void
- session_disconnect_adapter (void *cls, void *op_result)
- {
- struct GNUNET_SECRETSHARING_Session **sp = cls;
- unsigned int n = (sp - session_handles);
- GNUNET_assert (*sp == session_handles[n]);
- if (NULL != *sp)
- {
- GNUNET_SECRETSHARING_session_destroy (*sp);
- *sp = NULL;
- }
- GNUNET_assert (NULL != connect_ops[n]);
- connect_ops[n] = NULL;
- if (GNUNET_YES == in_shutdown)
- return;
- // all peers received their secret
- if (num_generated == num_peers)
- {
- int i;
- // only do decryption if requested by the user
- if (GNUNET_NO == decrypt)
- {
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- decrypt_start = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
- delay);
- decrypt_deadline = GNUNET_TIME_absolute_add (decrypt_start, timeout);
- // compute g^42 as the plaintext which we will decrypt and then
- // cooperatively decrypt
- GNUNET_SECRETSHARING_plaintext_generate_i (&reference_plaintext, 42);
- GNUNET_SECRETSHARING_encrypt (&common_pubkey, &reference_plaintext,
- &ciphertext);
- for (i = 0; i < num_peers; i++)
- connect_ops[i] =
- GNUNET_TESTBED_service_connect (NULL, peers[i], "secretsharing",
- &decrypt_connect_complete, NULL,
- &decrypt_connect_adapter,
- &decrypt_disconnect_adapter,
- &decrypt_handles[i]);
- }
- }
- /**
- * Callback to be called when the requested peer information is available
- *
- * @param cb_cls the closure from GNUNET_TETSBED_peer_get_information()
- * @param op the operation this callback corresponds to
- * @param pinfo the result; will be NULL if the operation has failed
- * @param emsg error message if the operation has failed; will be NULL if the
- * operation is successful
- */
- static void
- peer_info_cb (void *cb_cls,
- struct GNUNET_TESTBED_Operation *op,
- const struct GNUNET_TESTBED_PeerInformation *pinfo,
- const char *emsg)
- {
- struct GNUNET_PeerIdentity *p;
- int i;
- GNUNET_assert (NULL == emsg);
- p = (struct GNUNET_PeerIdentity *) cb_cls;
- if (pinfo->pit == GNUNET_TESTBED_PIT_IDENTITY)
- {
- *p = *pinfo->result.id;
- num_retrieved_peer_ids++;
- if (num_retrieved_peer_ids == num_peers)
- for (i = 0; i < num_peers; i++)
- connect_ops[i] =
- GNUNET_TESTBED_service_connect (NULL, peers[i], "secretsharing",
- session_connect_complete, NULL,
- session_connect_adapter,
- session_disconnect_adapter,
- &session_handles[i]);
- }
- else
- {
- GNUNET_assert (0);
- }
- GNUNET_TESTBED_operation_done (op);
- }
- /**
- * Signature of the main function of a task.
- *
- * @param cls closure
- */
- static void
- handle_shutdown (void *cls)
- {
- in_shutdown = GNUNET_YES;
- if (NULL != connect_ops)
- {
- unsigned int i;
- for (i = 0; i < num_peers; i++)
- if (NULL != connect_ops[i])
- {
- // the disconnect callback will set the op to NULL
- GNUNET_TESTBED_operation_done (connect_ops[i]);
- }
- GNUNET_free (connect_ops);
- }
- // killing the testbed operation will take care of remaining
- // service handles in the disconnect callback
- }
- /**
- * Signature of a main function for a testcase.
- *
- * @param cls closure
- * @param h the run handle
- * @param num_peers number of peers in 'peers'
- * @param started_peers handle to peers run in the testbed. NULL upon timeout (see
- * GNUNET_TESTBED_test_run()).
- * @param links_succeeded the number of overlay link connection attempts that
- * succeeded
- * @param links_failed the number of overlay link connection attempts that
- * failed
- */
- static void
- test_master (void *cls,
- struct GNUNET_TESTBED_RunHandle *h,
- unsigned int num_peers,
- struct GNUNET_TESTBED_Peer **started_peers,
- unsigned int links_succeeded,
- unsigned int links_failed)
- {
- int i;
- GNUNET_log_setup ("gnunet-secretsharing-profiler", "INFO", NULL);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "test master\n");
- GNUNET_SCHEDULER_add_shutdown (&handle_shutdown, NULL);
- peers = started_peers;
- peer_ids = GNUNET_malloc (num_peers * sizeof(struct GNUNET_PeerIdentity));
- session_handles = GNUNET_new_array (num_peers, struct
- GNUNET_SECRETSHARING_Session *);
- decrypt_handles = GNUNET_new_array (num_peers, struct
- GNUNET_SECRETSHARING_DecryptionHandle *);
- connect_ops = GNUNET_new_array (num_peers, struct GNUNET_TESTBED_Operation *);
- shares = GNUNET_new_array (num_peers, struct GNUNET_SECRETSHARING_Share *);
- for (i = 0; i < num_peers; i++)
- {
- // we do not store the returned operation, as peer_info_cb
- // will receive it as a parameter and call GNUNET_TESTBED_operation_done.
- GNUNET_TESTBED_peer_get_information (peers[i],
- GNUNET_TESTBED_PIT_IDENTITY,
- peer_info_cb,
- &peer_ids[i]);
- }
- }
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- static char *session_str = "gnunet-secretsharing/test";
- char *topology;
- int topology_cmp_result;
- dkg_start = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), delay);
- dkg_deadline = GNUNET_TIME_absolute_add (dkg_start, timeout);
- if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg, "testbed",
- "OVERLAY_TOPOLOGY",
- &topology))
- {
- fprintf (stderr,
- "'OVERLAY_TOPOLOGY' not found in 'testbed' config section, "
- "seems like you passed the wrong configuration file\n");
- return;
- }
- topology_cmp_result = strcasecmp (topology, "NONE");
- GNUNET_free (topology);
- if (0 == topology_cmp_result)
- {
- fprintf (stderr,
- "'OVERLAY_TOPOLOGY' set to 'NONE', "
- "seems like you passed the wrong configuration file\n");
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "running gnunet-secretsharing-profiler\n");
- GNUNET_CRYPTO_hash (session_str, strlen (session_str), &session_id);
- (void) GNUNET_TESTBED_test_run ("gnunet-secretsharing-profiler",
- cfgfile,
- num_peers,
- 0,
- controller_cb,
- NULL,
- test_master,
- NULL);
- }
- int
- main (int argc, char **argv)
- {
- struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_option_uint ('n',
- "num-peers",
- NULL,
- gettext_noop ("number of peers in consensus"),
- &num_peers),
- GNUNET_GETOPT_option_relative_time ('D',
- "delay",
- NULL,
- gettext_noop ("dkg start delay"),
- &delay),
- GNUNET_GETOPT_option_relative_time ('t',
- "timeout",
- NULL,
- gettext_noop ("dkg timeout"),
- &timeout),
- GNUNET_GETOPT_option_uint ('k',
- "threshold",
- NULL,
- gettext_noop ("threshold"),
- &threshold),
- GNUNET_GETOPT_option_flag ('d',
- "descrypt",
- gettext_noop ("also profile decryption"),
- &decrypt),
- GNUNET_GETOPT_option_verbose (&verbose),
- GNUNET_GETOPT_OPTION_END
- };
- delay = GNUNET_TIME_UNIT_ZERO;
- timeout = GNUNET_TIME_UNIT_MINUTES;
- GNUNET_PROGRAM_run2 (argc, argv, "gnunet-secretsharing-profiler",
- "help",
- options, &run, NULL, GNUNET_YES);
- return 0;
- }
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