468 lines
12 KiB
C
468 lines
12 KiB
C
/*
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This file is part of TALER
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(C) 2020 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file util/test_helper_eddsa.c
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* @brief Tests for EDDSA crypto helper
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_util.h"
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#include <gnunet/gnunet_signatures.h>
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/**
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* Configuration has 1 minute duration and 5 minutes lookahead, so
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* we should never have more than 6 active keys, plus for during
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* key expiration / revocation.
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*/
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#define MAX_KEYS 7
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/**
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* How many random key revocations should we test?
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*/
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#define NUM_REVOKES 3
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/**
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* How many iterations of the successful signing test should we run
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* during the benchmark phase?
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*/
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#define NUM_SIGN_TESTS 3
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/**
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* How many iterations of the successful signing test should we run
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* during the benchmark phase?
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*/
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#define NUM_SIGN_PERFS 100
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/**
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* Number of keys currently in #keys.
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*/
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static unsigned int num_keys;
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/**
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* Keys currently managed by the helper.
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*/
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struct KeyData
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{
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/**
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* Validity start point.
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*/
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struct GNUNET_TIME_Absolute start_time;
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/**
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* Key expires for signing at @e start_time plus this value.
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*/
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struct GNUNET_TIME_Relative validity_duration;
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/**
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* Full public key.
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*/
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struct TALER_ExchangePublicKeyP exchange_pub;
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/**
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* Is this key currently valid?
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*/
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bool valid;
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/**
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* Did the test driver revoke this key?
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*/
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bool revoked;
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};
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/**
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* Array of all the keys we got from the helper.
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*/
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static struct KeyData keys[MAX_KEYS];
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/**
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* Function called with information about available keys for signing. Usually
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* only called once per key upon connect. Also called again in case a key is
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* being revoked, in that case with an @a end_time of zero. Stores the keys
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* status in #keys.
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*
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* @param cls closure, NULL
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* @param start_time when does the key become available for signing;
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* zero if the key has been revoked or purged
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* @param validity_duration how long does the key remain available for signing;
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* zero if the key has been revoked or purged
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* @param exchange_pub the public key itself
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* @param sm_pub public key of the security module, NULL if the key was revoked or purged
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* @param sm_sig signature from the security module, NULL if the key was revoked or purged
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* The signature was already verified against @a sm_pub.
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*/
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static void
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key_cb (void *cls,
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struct GNUNET_TIME_Absolute start_time,
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struct GNUNET_TIME_Relative validity_duration,
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const struct TALER_ExchangePublicKeyP *exchange_pub,
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const struct TALER_SecurityModulePublicKeyP *sm_pub,
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const struct TALER_SecurityModuleSignatureP *sm_sig)
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{
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(void) sm_pub;
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(void) sm_sig;
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if (0 == validity_duration.rel_value_us)
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{
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bool found = false;
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for (unsigned int i = 0; i<MAX_KEYS; i++)
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if (0 == GNUNET_memcmp (exchange_pub,
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&keys[i].exchange_pub))
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{
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keys[i].valid = false;
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keys[i].revoked = false;
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GNUNET_assert (num_keys > 0);
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num_keys--;
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found = true;
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break;
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}
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if (! found)
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Error: helper announced expiration of unknown key!\n");
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return;
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}
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for (unsigned int i = 0; i<MAX_KEYS; i++)
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if (! keys[i].valid)
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{
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keys[i].valid = true;
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keys[i].exchange_pub = *exchange_pub;
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keys[i].start_time = start_time;
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keys[i].validity_duration = validity_duration;
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num_keys++;
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return;
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}
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/* too many keys! */
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Error: received %d live keys from the service!\n",
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MAX_KEYS + 1);
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}
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/**
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* Test key revocation logic.
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*
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* @param esh handle to the helper
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* @return 0 on success
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*/
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static int
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test_revocation (struct TALER_CRYPTO_ExchangeSignHelper *esh)
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{
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struct timespec req = {
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.tv_nsec = 250000000
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};
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for (unsigned int i = 0; i<NUM_REVOKES; i++)
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{
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uint32_t off;
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off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
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num_keys);
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/* find index of key to revoke */
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for (unsigned int j = 0; j < MAX_KEYS; j++)
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{
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if (! keys[j].valid)
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continue;
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if (0 != off)
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{
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off--;
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continue;
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}
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keys[j].revoked = true;
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fprintf (stderr,
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"Revoking key ...");
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TALER_CRYPTO_helper_esign_revoke (esh,
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&keys[j].exchange_pub);
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for (unsigned int k = 0; k<1000; k++)
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{
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TALER_CRYPTO_helper_esign_poll (esh);
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if (! keys[j].revoked)
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break;
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nanosleep (&req, NULL);
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fprintf (stderr, ".");
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}
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if (keys[j].revoked)
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{
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fprintf (stderr,
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"\nFAILED: timeout trying to revoke key %u\n",
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j);
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TALER_CRYPTO_helper_esign_disconnect (esh);
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return 2;
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}
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fprintf (stderr, "\n");
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break;
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}
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}
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return 0;
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}
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/**
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* Test signing logic.
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*
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* @param esh handle to the helper
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* @return 0 on success
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*/
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static int
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test_signing (struct TALER_CRYPTO_ExchangeSignHelper *esh)
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{
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struct GNUNET_CRYPTO_EccSignaturePurpose purpose = {
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.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TEST),
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.size = htonl (sizeof (purpose)),
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};
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for (unsigned int i = 0; i<NUM_SIGN_TESTS; i++)
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{
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struct TALER_ExchangePublicKeyP exchange_pub;
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struct TALER_ExchangeSignatureP exchange_sig;
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enum TALER_ErrorCode ec;
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ec = TALER_CRYPTO_helper_esign_sign_ (esh,
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&purpose,
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&exchange_pub,
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&exchange_sig);
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switch (ec)
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{
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case TALER_EC_NONE:
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if (GNUNET_OK !=
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GNUNET_CRYPTO_eddsa_verify_ (GNUNET_SIGNATURE_PURPOSE_TEST,
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&purpose,
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&exchange_sig.eddsa_signature,
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&exchange_pub.eddsa_pub))
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{
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/* signature invalid */
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GNUNET_break (0);
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return 17;
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}
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GNUNET_log (GNUNET_ERROR_TYPE_INFO,
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"Received valid signature\n");
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break;
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default:
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/* unexpected error */
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Unexpected error %d\n",
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ec);
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return 7;
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}
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}
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return 0;
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}
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/**
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* Benchmark signing logic.
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*
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* @param esh handle to the helper
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* @return 0 on success
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*/
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static int
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perf_signing (struct TALER_CRYPTO_ExchangeSignHelper *esh)
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{
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struct GNUNET_CRYPTO_EccSignaturePurpose purpose = {
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.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TEST),
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.size = htonl (sizeof (purpose)),
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};
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struct GNUNET_TIME_Relative duration;
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duration = GNUNET_TIME_UNIT_ZERO;
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for (unsigned int j = 0; j<NUM_SIGN_PERFS; j++)
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{
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struct GNUNET_TIME_Relative delay;
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struct TALER_ExchangePublicKeyP exchange_pub;
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struct TALER_ExchangeSignatureP exchange_sig;
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enum TALER_ErrorCode ec;
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struct GNUNET_TIME_Absolute start;
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TALER_CRYPTO_helper_esign_poll (esh);
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start = GNUNET_TIME_absolute_get ();
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ec = TALER_CRYPTO_helper_esign_sign_ (esh,
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&purpose,
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&exchange_pub,
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&exchange_sig);
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if (TALER_EC_NONE != ec)
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{
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GNUNET_break (0);
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return 42;
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}
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delay = GNUNET_TIME_absolute_get_duration (start);
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duration = GNUNET_TIME_relative_add (duration,
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delay);
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} /* for j */
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fprintf (stderr,
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"%u (sequential) signature operations took %s\n",
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(unsigned int) NUM_SIGN_TESTS,
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GNUNET_STRINGS_relative_time_to_string (duration,
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GNUNET_YES));
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return 0;
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}
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/**
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* Main entry point into the test logic with the helper already running.
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*/
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static int
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run_test (void)
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{
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struct GNUNET_CONFIGURATION_Handle *cfg;
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struct TALER_CRYPTO_ExchangeSignHelper *esh;
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struct timespec req = {
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.tv_nsec = 250000000
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};
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int ret;
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cfg = GNUNET_CONFIGURATION_create ();
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_load (cfg,
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"test_helper_eddsa.conf"))
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{
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GNUNET_break (0);
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return 77;
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}
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/* wait for helper to start and give us keys */
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fprintf (stderr, "Waiting for helper client directory to become available ");
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for (unsigned int i = 0; i<1000; i++)
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{
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esh = TALER_CRYPTO_helper_esign_connect (cfg,
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&key_cb,
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NULL);
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if (NULL != esh)
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break;
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nanosleep (&req, NULL);
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fprintf (stderr, ".");
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}
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GNUNET_CONFIGURATION_destroy (cfg);
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if (NULL == esh)
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{
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GNUNET_break (0);
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return 1;
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}
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fprintf (stderr, " done.\n");
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/* wait for helper to start and give us keys */
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fprintf (stderr, "Waiting for helper to start ");
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for (unsigned int i = 0; i<1000; i++)
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{
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TALER_CRYPTO_helper_esign_poll (esh);
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if (0 != num_keys)
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break;
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nanosleep (&req, NULL);
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fprintf (stderr, ".");
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}
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if (0 == num_keys)
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{
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fprintf (stderr,
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"\nFAILED: timeout trying to connect to helper\n");
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TALER_CRYPTO_helper_esign_disconnect (esh);
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return 1;
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}
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fprintf (stderr,
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"\nOK: Helper ready (%u keys)\n",
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num_keys);
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ret = 0;
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if (0 == ret)
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ret = test_revocation (esh);
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if (0 == ret)
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ret = test_signing (esh);
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if (0 == ret)
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ret = perf_signing (esh);
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TALER_CRYPTO_helper_esign_disconnect (esh);
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/* clean up our state */
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for (unsigned int i = 0; i<MAX_KEYS; i++)
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if (keys[i].valid)
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{
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keys[i].valid = false;
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GNUNET_assert (num_keys > 0);
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num_keys--;
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}
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return ret;
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}
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int
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main (int argc,
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const char *const argv[])
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{
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struct GNUNET_OS_Process *helper;
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char *libexec_dir;
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char *binary_name;
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int ret;
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enum GNUNET_OS_ProcessStatusType type;
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unsigned long code;
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(void) argc;
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(void) argv;
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GNUNET_log_setup ("test-helper-eddsa",
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"INFO",
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NULL);
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GNUNET_OS_init (TALER_project_data_default ());
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libexec_dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
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GNUNET_asprintf (&binary_name,
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"%s/%s",
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libexec_dir,
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"taler-exchange-secmod-eddsa");
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GNUNET_free (libexec_dir);
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helper = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ERR,
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NULL, NULL, NULL,
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binary_name,
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binary_name,
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"-c",
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"test_helper_eddsa.conf",
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"-L",
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"INFO",
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NULL);
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if (NULL == helper)
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{
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GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
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"exec",
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binary_name);
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GNUNET_free (binary_name);
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return 77;
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}
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GNUNET_free (binary_name);
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ret = run_test ();
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GNUNET_OS_process_kill (helper,
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SIGTERM);
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if (GNUNET_OK !=
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GNUNET_OS_process_wait_status (helper,
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&type,
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&code))
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Helper process did not die voluntarily, killing hard\n");
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GNUNET_OS_process_kill (helper,
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SIGKILL);
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ret = 4;
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}
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else if ( (GNUNET_OS_PROCESS_EXITED != type) ||
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(0 != code) )
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Helper died with unexpected status %d/%d\n",
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(int) type,
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(int) code);
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ret = 5;
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}
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GNUNET_OS_process_destroy (helper);
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return ret;
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}
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/* end of test_helper_eddsa.c */
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