def test_compute_local_mean(self):
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean(None)
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean("")
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean("XYZZY")
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean(555)
certs = []
local_mean = WaitTimer.compute_local_mean(certs)
self.assertEqual(local_mean, 30)
def test_compute_local_mean(self):
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean(None)
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean("")
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean("XYZZY")
with self.assertRaises(TypeError) as context:
local_mean = WaitTimer.compute_local_mean(555)
certs = []
local_mean = WaitTimer.compute_local_mean(certs)
self.assertEqual(local_mean, 30)
def is_valid_wait_certificate(self, certs):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
cert = self.EnclaveWaitCertificate
expectedmean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.LocalMean, expectedmean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.LocalMean,
expectedmean)
# return False
if cert.PreviousCertID == self.PoetEnclave.NullIdentifier:
return True
if cert.PreviousCertID != certs[-1].Identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.PreviousCertID, certs[-1].Identifier)
# return False
return self.PoetEnclave.VerifyWaitCertificate(cert)
def is_valid_wait_certificate(self, certs):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
cert = self.enclave_wait_certificate
expected_mean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.local_mean, expected_mean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.local_mean,
expected_mean)
# return False
if cert.previous_certificate_id == self._poet_enclave.NULL_IDENTIFIER:
return True
if cert.previous_certificate_id != certs[-1].identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.previous_certificate_id, certs[-1].identifier)
# return False
return self._poet_enclave.verify_wait_certificate(cert)
def is_valid_wait_certificate(self, certs):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
cert = self.EnclaveWaitCertificate
expectedmean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.LocalMean, expectedmean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.LocalMean,
expectedmean)
# return False
if cert.PreviousCertID == self.PoetEnclave.NullIdentifier:
return True
if cert.PreviousCertID != certs[-1].Identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.PreviousCertID, certs[-1].Identifier)
# return False
return self.PoetEnclave.VerifyWaitCertificate(cert)
def is_valid_wait_certificate(self, certs):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
cert = self.enclave_wait_certificate
if cert.duration < self._poet_enclave.MINIMUM_WAIT_TIME:
logger.warn('Wait time less then minimum: %s != %s', cert.duration,
self._poet_enclave.MINIMUM_WAIT_TIME)
return False
expected_mean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.local_mean, expected_mean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.local_mean,
expected_mean)
return False
if cert.previous_certificate_id == self._poet_enclave.NULL_IDENTIFIER:
if len(certs) == 0:
return True
if cert.previous_certificate_id != certs[-1].identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.previous_certificate_id, certs[-1].identifier)
return False
return self._poet_enclave.verify_wait_certificate(cert)
def is_valid_wait_certificate(self, originator_id, certs, transactions):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
if not isinstance(originator_id, basestring):
raise TypeError
if not isinstance(certs, list):
raise TypeError
if not isinstance(transactions, list):
raise TypeError
cert = self.enclave_wait_certificate
if not cert:
return False
if cert.duration < self.poet_enclave.MINIMUM_WAIT_TIME:
logger.warn('Wait time less then minimum: %s != %s',
cert.duration, self.poet_enclave.MINIMUM_WAIT_TIME)
return False
expected_mean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.local_mean, expected_mean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.local_mean,
expected_mean)
return False
if cert.previous_certificate_id == self.poet_enclave.NULL_IDENTIFIER:
if len(certs) == 0:
return True
if cert.previous_certificate_id != certs[-1].identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.previous_certificate_id, certs[-1].identifier)
return False
hasher = hashlib.sha256()
for tid in transactions:
hasher.update(tid)
block_hash = hasher.hexdigest()
if block_hash != self.block_hash:
logger.warn('Transaction hash mismatch : %s != %s',
self.block_hash, block_hash)
return False
if self.validator_address != originator_id:
logger.warn('Originator Id mismatch: %s != %s',
self.validator_address, originator_id)
return False
return self.poet_enclave.verify_wait_certificate(cert)
def is_valid_wait_certificate(self, certs):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
if not isinstance(certs, list):
raise TypeError
cert = self.enclave_wait_certificate
if not cert:
return False
if cert.duration < self.poet_enclave.MINIMUM_WAIT_TIME:
logger.warn('Wait time less then minimum: %s != %s',
cert.duration, self.poet_enclave.MINIMUM_WAIT_TIME)
return False
expected_mean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.local_mean, expected_mean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.local_mean,
expected_mean)
return False
if cert.previous_certificate_id == self.poet_enclave.NULL_IDENTIFIER:
if len(certs) == 0:
return True
if cert.previous_certificate_id != certs[-1].identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.previous_certificate_id, certs[-1].identifier)
return False
return self.poet_enclave.verify_wait_certificate(cert)
def is_valid_wait_certificate(self, originator_id, certs, transactions):
"""Determines whether the wait certificate is valid.
Args:
certs (list): A list of historical certs.
Returns:
bool: Whether or not the wait certificate is valid.
"""
if not isinstance(originator_id, basestring):
raise TypeError
if not isinstance(certs, list):
raise TypeError
if not isinstance(transactions, list):
raise TypeError
cert = self.enclave_wait_certificate
if not cert:
return False
if cert.duration < self.poet_enclave.MINIMUM_WAIT_TIME:
logger.warn('Wait time less then minimum: %s != %s', cert.duration,
self.poet_enclave.MINIMUM_WAIT_TIME)
return False
expected_mean = WaitTimer.compute_local_mean(certs)
if not is_close(cert.local_mean, expected_mean, abs_tol=0.001):
logger.warn('mismatch local mean: %s != %s', cert.local_mean,
expected_mean)
return False
if cert.previous_certificate_id == self.poet_enclave.NULL_IDENTIFIER:
if len(certs) == 0:
return True
if cert.previous_certificate_id != certs[-1].identifier:
logger.warn('mismatch previous identifier: %s != %s',
cert.previous_certificate_id, certs[-1].identifier)
return False
hasher = hashlib.sha256()
for tid in transactions:
hasher.update(tid)
block_hash = hasher.hexdigest()
if block_hash != self.block_hash:
logger.warn('Transaction hash mismatch : %s != %s',
self.block_hash, block_hash)
return False
if self.validator_address != originator_id:
logger.warn('Originator Id mismatch: %s != %s',
self.validator_address, originator_id)
return False
try:
return self.poet_enclave.verify_wait_certificate(cert)
except Timeout:
raise NotAvailableException
except ConnectionError:
raise NotAvailableException