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|
/*
This file is part of TALER
(C) 2020, 2021 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file util/test_helper_cs.c
* @brief Tests for CS crypto helper
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
/**
* Configuration has 1 minute duration and 5 minutes lookahead, but
* we do not get 'revocations' for expired keys. So this must be
* large enough to deal with key rotation during the runtime of
* the benchmark.
*/
#define MAX_KEYS 1024
/**
* How many random key revocations should we test?
*/
#define NUM_REVOKES 3
/**
* How many iterations of the successful signing test should we run?
*/
#define NUM_SIGN_TESTS 5
/**
* How many iterations of the successful signing test should we run
* during the benchmark phase?
*/
#define NUM_SIGN_PERFS 100
/**
* How many parallel clients should we use for the parallel
* benchmark? (> 500 may cause problems with the max open FD number limit).
*/
#define NUM_CORES 8
/**
* Number of keys currently in #keys.
*/
static unsigned int num_keys;
/**
* Keys currently managed by the helper.
*/
struct KeyData
{
/**
* Validity start point.
*/
struct GNUNET_TIME_Timestamp start_time;
/**
* Key expires for signing at @e start_time plus this value.
*/
struct GNUNET_TIME_Relative validity_duration;
/**
* Hash of the public key.
*/
struct TALER_CsPubHashP h_cs;
/**
* Full public key.
*/
struct TALER_DenominationPublicKey denom_pub;
/**
* Is this key currently valid?
*/
bool valid;
/**
* Did the test driver revoke this key?
*/
bool revoked;
};
/**
* Array of all the keys we got from the helper.
*/
static struct KeyData keys[MAX_KEYS];
/**
* Release memory occupied by #keys.
*/
static void
free_keys (void)
{
for (unsigned int i = 0; i<MAX_KEYS; i++)
if (keys[i].valid)
{
TALER_denom_pub_free (&keys[i].denom_pub);
keys[i].valid = false;
GNUNET_assert (num_keys > 0);
num_keys--;
}
}
/**
* Function called with information about available keys for signing. Usually
* only called once per key upon connect. Also called again in case a key is
* being revoked, in that case with an @a end_time of zero. Stores the keys
* status in #keys.
*
* @param cls closure, NULL
* @param section_name name of the denomination type in the configuration;
* NULL if the key has been revoked or purged
* @param start_time when does the key become available for signing;
* zero if the key has been revoked or purged
* @param validity_duration how long does the key remain available for signing;
* zero if the key has been revoked or purged
* @param h_cs hash of the @a denom_pub that is available (or was purged)
* @param denom_pub the public key itself, NULL if the key was revoked or purged
* @param sm_pub public key of the security module, NULL if the key was revoked or purged
* @param sm_sig signature from the security module, NULL if the key was revoked or purged
* The signature was already verified against @a sm_pub.
*/
static void
key_cb (void *cls,
const char *section_name,
struct GNUNET_TIME_Timestamp start_time,
struct GNUNET_TIME_Relative validity_duration,
const struct TALER_CsPubHashP *h_cs,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_SecurityModulePublicKeyP *sm_pub,
const struct TALER_SecurityModuleSignatureP *sm_sig)
{
(void) cls;
(void) sm_pub;
(void) sm_sig;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Key notification about key %s in `%s'\n",
GNUNET_h2s (&h_cs->hash),
section_name);
if (0 == validity_duration.rel_value_us)
{
bool found = false;
GNUNET_break (NULL == denom_pub);
GNUNET_break (NULL == section_name);
for (unsigned int i = 0; i<MAX_KEYS; i++)
if (0 == GNUNET_memcmp (h_cs,
&keys[i].h_cs))
{
keys[i].valid = false;
keys[i].revoked = false;
TALER_denom_pub_free (&keys[i].denom_pub);
GNUNET_assert (num_keys > 0);
num_keys--;
found = true;
break;
}
if (! found)
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Error: helper announced expiration of unknown key!\n");
return;
}
GNUNET_break (NULL != denom_pub);
for (unsigned int i = 0; i<MAX_KEYS; i++)
if (! keys[i].valid)
{
keys[i].valid = true;
keys[i].h_cs = *h_cs;
keys[i].start_time = start_time;
keys[i].validity_duration = validity_duration;
TALER_denom_pub_deep_copy (&keys[i].denom_pub,
denom_pub);
num_keys++;
return;
}
/* too many keys! */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Error: received %d live keys from the service!\n",
MAX_KEYS + 1);
}
/**
* Test key revocation logic.
*
* @param dh handle to the helper
* @return 0 on success
*/
static int
test_revocation (struct TALER_CRYPTO_CsDenominationHelper *dh)
{
struct timespec req = {
.tv_nsec = 250000000
};
for (unsigned int i = 0; i<NUM_REVOKES; i++)
{
uint32_t off;
off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
num_keys);
/* find index of key to revoke */
for (unsigned int j = 0; j < MAX_KEYS; j++)
{
if (! keys[j].valid)
continue;
if (0 != off)
{
off--;
continue;
}
keys[j].revoked = true;
fprintf (stderr,
"Revoking key %s ...",
GNUNET_h2s (&keys[j].h_cs.hash));
TALER_CRYPTO_helper_cs_revoke (dh,
&keys[j].h_cs);
for (unsigned int k = 0; k<1000; k++)
{
TALER_CRYPTO_helper_cs_poll (dh);
if (! keys[j].revoked)
break;
nanosleep (&req, NULL);
fprintf (stderr, ".");
}
if (keys[j].revoked)
{
fprintf (stderr,
"\nFAILED: timeout trying to revoke key %u\n",
j);
TALER_CRYPTO_helper_cs_disconnect (dh);
return 2;
}
fprintf (stderr, "\n");
break;
}
}
return 0;
}
/**
* Test signing logic.
*
* @param dh handle to the helper
* @return 0 on success
*/
static int
test_signing (struct TALER_CRYPTO_CsDenominationHelper *dh)
{
struct TALER_BlindedDenominationSignature ds;
enum TALER_ErrorCode ec;
bool success = false;
struct TALER_PlanchetSecretsP ps;
struct TALER_CoinPubHash c_hash;
TALER_planchet_setup_random (&ps, TALER_DENOMINATION_RSA);
for (unsigned int i = 0; i<MAX_KEYS; i++)
{
if (! keys[i].valid)
continue;
{
struct TALER_PlanchetDetail pd;
pd.blinded_planchet.cipher = TALER_DENOMINATION_RSA;
// keys[i].denom_pub.cipher = TALER_DENOMINATION_CS;
GNUNET_assert (GNUNET_YES ==
TALER_planchet_prepare (&keys[i].denom_pub,
&ps,
&c_hash,
&pd));
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Requesting signature over %u bytes with key %s\n",
(unsigned
int) pd.blinded_planchet.details.rsa_blinded_planchet.
blinded_msg_size,
GNUNET_h2s (&keys[i].h_cs.hash));
ds = TALER_CRYPTO_helper_cs_sign (dh,
&keys[i].h_cs,
pd.blinded_planchet.details.
rsa_blinded_planchet.blinded_msg,
pd.blinded_planchet.details.
rsa_blinded_planchet.blinded_msg_size,
&ec);
GNUNET_free (
pd.blinded_planchet.details.rsa_blinded_planchet.blinded_msg);
}
switch (ec)
{
case TALER_EC_NONE:
if (GNUNET_TIME_relative_cmp (GNUNET_TIME_absolute_get_remaining (
keys[i].start_time.abs_time),
>,
GNUNET_TIME_UNIT_SECONDS))
{
/* key worked too early */
GNUNET_break (0);
return 4;
}
if (GNUNET_TIME_relative_cmp (GNUNET_TIME_absolute_get_duration (
keys[i].start_time.abs_time),
>,
keys[i].validity_duration))
{
/* key worked too later */
GNUNET_break (0);
return 5;
}
{
struct TALER_DenominationSignature rs;
if (GNUNET_OK !=
TALER_denom_sig_unblind (&rs,
&ds,
&ps.blinding_key,
&keys[i].denom_pub))
{
GNUNET_break (0);
return 6;
}
TALER_blinded_denom_sig_free (&ds);
if (GNUNET_OK !=
TALER_denom_pub_verify (&keys[i].denom_pub,
&rs,
&c_hash))
{
/* signature invalid */
GNUNET_break (0);
TALER_denom_sig_free (&rs);
return 7;
}
TALER_denom_sig_free (&rs);
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Received valid signature for key %s\n",
GNUNET_h2s (&keys[i].h_cs.hash));
success = true;
break;
case TALER_EC_EXCHANGE_DENOMINATION_HELPER_TOO_EARLY:
/* This 'failure' is expected, we're testing also for the
error handling! */
if ( (GNUNET_TIME_relative_is_zero (
GNUNET_TIME_absolute_get_remaining (
keys[i].start_time.abs_time))) &&
(GNUNET_TIME_relative_cmp (
GNUNET_TIME_absolute_get_duration (
keys[i].start_time.abs_time),
<,
keys[i].validity_duration)) )
{
/* key should have worked! */
GNUNET_break (0);
return 6;
}
break;
default:
/* unexpected error */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected error %d\n",
ec);
return 7;
}
}
if (! success)
{
/* no valid key for signing found, also bad */
GNUNET_break (0);
return 16;
}
/* check signing does not work if the key is unknown */
{
struct TALER_CsPubHashP rnd;
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
&rnd,
sizeof (rnd));
ds = TALER_CRYPTO_helper_cs_sign (dh,
&rnd,
"Hello",
strlen ("Hello"),
&ec);
if (TALER_EC_EXCHANGE_GENERIC_DENOMINATION_KEY_UNKNOWN != ec)
{
if (TALER_EC_NONE == ec)
TALER_blinded_denom_sig_free (&ds);
GNUNET_break (0);
return 17;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Signing with invalid key %s failed as desired\n",
GNUNET_h2s (&rnd.hash));
}
return 0;
}
/**
* Benchmark signing logic.
*
* @param dh handle to the helper
* @return 0 on success
*/
static int
perf_signing (struct TALER_CRYPTO_CsDenominationHelper *dh,
const char *type)
{
struct TALER_BlindedDenominationSignature ds;
enum TALER_ErrorCode ec;
struct GNUNET_TIME_Relative duration;
struct TALER_PlanchetSecretsP ps;
TALER_planchet_setup_random (&ps, TALER_DENOMINATION_RSA);
duration = GNUNET_TIME_UNIT_ZERO;
TALER_CRYPTO_helper_cs_poll (dh);
for (unsigned int j = 0; j<NUM_SIGN_PERFS;)
{
for (unsigned int i = 0; i<MAX_KEYS; i++)
{
if (! keys[i].valid)
continue;
if (GNUNET_TIME_relative_cmp (GNUNET_TIME_absolute_get_remaining (
keys[i].start_time.abs_time),
>,
GNUNET_TIME_UNIT_SECONDS))
continue;
if (GNUNET_TIME_relative_cmp (GNUNET_TIME_absolute_get_duration (
keys[i].start_time.abs_time),
>,
keys[i].validity_duration))
continue;
{
struct TALER_CoinPubHash c_hash;
struct TALER_PlanchetDetail pd;
GNUNET_assert (GNUNET_YES ==
TALER_planchet_prepare (&keys[i].denom_pub,
&ps,
&c_hash,
&pd));
/* use this key as long as it works */
while (1)
{
struct GNUNET_TIME_Absolute start = GNUNET_TIME_absolute_get ();
struct GNUNET_TIME_Relative delay;
ds = TALER_CRYPTO_helper_cs_sign (dh,
&keys[i].h_cs,
pd.blinded_planchet.details.
rsa_blinded_planchet.blinded_msg,
pd.blinded_planchet.details.
rsa_blinded_planchet.
blinded_msg_size,
&ec);
if (TALER_EC_NONE != ec)
break;
delay = GNUNET_TIME_absolute_get_duration (start);
duration = GNUNET_TIME_relative_add (duration,
delay);
TALER_blinded_denom_sig_free (&ds);
j++;
if (NUM_SIGN_PERFS <= j)
break;
}
GNUNET_free (
pd.blinded_planchet.details.rsa_blinded_planchet.blinded_msg);
}
} /* for i */
} /* for j */
fprintf (stderr,
"%u (%s) signature operations took %s\n",
(unsigned int) NUM_SIGN_PERFS,
type,
GNUNET_STRINGS_relative_time_to_string (duration,
GNUNET_YES));
return 0;
}
/**
* Parallel signing logic.
*
* @param esh handle to the helper
* @return 0 on success
*/
static int
par_signing (struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_TIME_Absolute start;
struct GNUNET_TIME_Relative duration;
pid_t pids[NUM_CORES];
struct TALER_CRYPTO_CsDenominationHelper *dh;
start = GNUNET_TIME_absolute_get ();
for (unsigned int i = 0; i<NUM_CORES; i++)
{
pids[i] = fork ();
num_keys = 0;
GNUNET_assert (-1 != pids[i]);
if (0 == pids[i])
{
int ret;
dh = TALER_CRYPTO_helper_cs_connect (cfg,
&key_cb,
NULL);
GNUNET_assert (NULL != dh);
ret = perf_signing (dh,
"parallel");
TALER_CRYPTO_helper_cs_disconnect (dh);
free_keys ();
exit (ret);
}
}
for (unsigned int i = 0; i<NUM_CORES; i++)
{
int wstatus;
GNUNET_assert (pids[i] ==
waitpid (pids[i],
&wstatus,
0));
}
duration = GNUNET_TIME_absolute_get_duration (start);
fprintf (stderr,
"%u (parallel) signature operations took %s (total real time)\n",
(unsigned int) NUM_SIGN_PERFS * NUM_CORES,
GNUNET_STRINGS_relative_time_to_string (duration,
GNUNET_YES));
return 0;
}
/**
* Main entry point into the test logic with the helper already running.
*/
static int
run_test (void)
{
struct GNUNET_CONFIGURATION_Handle *cfg;
struct TALER_CRYPTO_CsDenominationHelper *dh;
struct timespec req = {
.tv_nsec = 250000000
};
int ret;
cfg = GNUNET_CONFIGURATION_create ();
if (GNUNET_OK !=
GNUNET_CONFIGURATION_load (cfg,
"test_helper_cs.conf"))
{
GNUNET_break (0);
return 77;
}
fprintf (stderr, "Waiting for helper to start ... ");
for (unsigned int i = 0; i<100; i++)
{
nanosleep (&req,
NULL);
dh = TALER_CRYPTO_helper_cs_connect (cfg,
&key_cb,
NULL);
if (NULL != dh)
break;
fprintf (stderr, ".");
}
if (NULL == dh)
{
fprintf (stderr,
"\nFAILED: timeout trying to connect to helper\n");
GNUNET_CONFIGURATION_destroy (cfg);
return 1;
}
if (0 == num_keys)
{
fprintf (stderr,
"\nFAILED: timeout trying to connect to helper\n");
TALER_CRYPTO_helper_cs_disconnect (dh);
GNUNET_CONFIGURATION_destroy (cfg);
return 1;
}
fprintf (stderr,
" Done (%u keys)\n",
num_keys);
ret = 0;
if (0 == ret)
ret = test_revocation (dh);
if (0 == ret)
ret = test_signing (dh);
if (0 == ret)
ret = perf_signing (dh,
"sequential");
TALER_CRYPTO_helper_cs_disconnect (dh);
free_keys ();
if (0 == ret)
ret = par_signing (cfg);
/* clean up our state */
GNUNET_CONFIGURATION_destroy (cfg);
return ret;
}
int
main (int argc,
const char *const argv[])
{
struct GNUNET_OS_Process *helper;
char *libexec_dir;
char *binary_name;
int ret;
enum GNUNET_OS_ProcessStatusType type;
unsigned long code;
(void) argc;
(void) argv;
unsetenv ("XDG_DATA_HOME");
unsetenv ("XDG_CONFIG_HOME");
GNUNET_log_setup ("test-helper-cs",
"WARNING",
NULL);
GNUNET_OS_init (TALER_project_data_default ());
libexec_dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
GNUNET_asprintf (&binary_name,
"%s/%s",
libexec_dir,
"taler-exchange-secmod-cs");
GNUNET_free (libexec_dir);
helper = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ERR,
NULL, NULL, NULL,
binary_name,
binary_name,
"-c",
"test_helper_cs.conf",
"-L",
"WARNING",
NULL);
if (NULL == helper)
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"exec",
binary_name);
GNUNET_free (binary_name);
return 77;
}
GNUNET_free (binary_name);
ret = run_test ();
GNUNET_OS_process_kill (helper,
SIGTERM);
if (GNUNET_OK !=
GNUNET_OS_process_wait_status (helper,
&type,
&code))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Helper process did not die voluntarily, killing hard\n");
GNUNET_OS_process_kill (helper,
SIGKILL);
ret = 4;
}
else if ( (GNUNET_OS_PROCESS_EXITED != type) ||
(0 != code) )
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Helper died with unexpected status %d/%d\n",
(int) type,
(int) code);
ret = 5;
}
GNUNET_OS_process_destroy (helper);
return ret;
}
/* end of test_helper_cs.c */
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