def compute_pdo_ccl_signature(private_key, enclave_id, enclave_signature,
channel_id, contract_id, creator_public_key_pem,
contract_code_hash, message_hash,
current_state_hash, previous_state_hash,
dependency_list):
k = crypto.SIG_PrivateKey(private_key)
message_byte_array = crypto.string_to_byte_array(enclave_id)
message_byte_array += crypto.base64_to_byte_array(enclave_signature)
message_byte_array += crypto.string_to_byte_array(channel_id)
message_byte_array += crypto.string_to_byte_array(contract_id)
message_byte_array += crypto.string_to_byte_array(creator_public_key_pem)
message_byte_array += crypto.base64_to_byte_array(contract_code_hash)
message_byte_array += crypto.base64_to_byte_array(message_hash)
message_byte_array += crypto.base64_to_byte_array(current_state_hash)
#in ccl initialize, previous state hash and dependencies are supposed to be empty
if previous_state_hash:
message_byte_array += crypto.base64_to_byte_array(previous_state_hash)
for d in dependency_list:
message_byte_array += crypto.string_to_byte_array(d.contract_id)
message_byte_array += crypto.string_to_byte_array(d.state_hash)
signature = k.SignMessage(message_byte_array)
encoded_signature = crypto.byte_array_to_base64(signature)
logger.debug("signed message string: " +
crypto.byte_array_to_base64(message_byte_array))
logger.debug("signed message hash: " + crypto.byte_array_to_hex(
crypto.compute_message_hash(message_byte_array)))
logger.debug("signature: %s", encoded_signature)
return encoded_signature
def from_transaction_signature_to_id(transaction_signature):
"""function to transform a hex transaction signature (or transaction identifier)
into a base64 id which is used (for instance) for a contract id
"""
id = crypto.byte_array_to_base64(
crypto.compute_message_hash(
crypto.hex_to_byte_array(transaction_signature)))
return id
def __encryption_key__(password):
"""create an AES encryption/decryption key from the password
"""
try:
password = password.encode('utf-8')
except AttributeError:
pass
return crypto.compute_message_hash(password)[:16]
def compute_hash(self, encoding = 'raw') :
# the code hash is a combination of the hash of the actual code,
# and the hash of the nonce.
# this makes it possible to use the nonce to verify the identity
# of the actual code (think MRENCLAVE).
code_hash = crypto.compute_message_hash(crypto.string_to_byte_array(self.code + self.name))
nonce_hash = crypto.compute_message_hash(crypto.string_to_byte_array(self.nonce))
message = code_hash + nonce_hash
code_hash = crypto.compute_message_hash(message)
if encoding == 'raw' :
return code_hash
elif encoding == 'hex' :
return crypto.byte_array_to_hex(code_hash)
elif encoding == 'b64' :
return crypto.byte_array_to_base64(code_hash)
else :
raise ValueError('unknown hash encoding; {}'.format(encoding))
def compute_hash(self, encoding = 'raw') :
serialized = self.__serialize_for_hashing()
code_hash = crypto.compute_message_hash(crypto.string_to_byte_array(serialized))
if encoding == 'raw' :
return code_hash
elif encoding == 'hex' :
return crypto.byte_array_to_hex(code_hash)
elif encoding == 'b64' :
return crypto.byte_array_to_base64(code_hash)
else :
raise ValueError('unknown hash encoding; {}'.format(encoding))
def make_channel_keys(self, ledger_type=os.environ.get('PDO_LEDGER_TYPE')):
if ledger_type == 'sawtooth':
self.channel_keys = keys.TransactionKeys()
self.channel_id = self.channel_keys.txn_public
elif ledger_type == 'ccf':
self.channel_keys = crypto.random_bit_string(64) # byte array
self.channel_id = crypto.byte_array_to_base64(
crypto.compute_message_hash(self.channel_keys))
else:
raise Exception(
"Invalid Ledger Type. Must be either sawtooth or ccf.")
def compute_hash(encrypted_state, encoding='raw'):
""" compute the hash of the encrypted state
"""
state_byte_array = crypto.base64_to_byte_array(encrypted_state)
state_hash = crypto.compute_message_hash(state_byte_array)
if encoding == 'raw':
return state_hash
elif encoding == 'b64':
return crypto.byte_array_to_base64(state_hash)
elif encoding == 'hex':
return crypto.byte_array_to_hex(state_hash)
raise ValueError('unknown encoding; {}'.format(encoding))
def compute_hash(raw_state, encoding='raw'):
""" compute the hash of the contract state
:param raw_state string: root block of contract state, json string
"""
state_hash = crypto.compute_message_hash(raw_state)
if encoding == 'raw':
return state_hash
elif encoding == 'b64':
return crypto.byte_array_to_base64(state_hash)
elif encoding == 'hex':
return crypto.byte_array_to_hex(state_hash)
raise ValueError('unknown encoding; {}'.format(encoding))
def build_contract_registration_from_data(
contract_creator_keys,
contract_code_hash,
provisioning_service_ids):
payloadblob = dict()
payloadblob['contract_code_hash'] = contract_code_hash
payloadblob['provisioning_service_ids'] = provisioning_service_ids
payloadblob['contract_creator_verifying_key_PEM'] = contract_creator_keys.verifying_key
# sign the payload after adding a nonce
nonce = time.time().hex()
payloadblob['nonce'] = nonce
payloadblob['signature'] = compute_pdo_signature_contract_registration(contract_creator_keys.signing_key,
contract_creator_keys.verifying_key, contract_code_hash, provisioning_service_ids, nonce)
payloadblob['contract_id'] = \
crypto.byte_array_to_base64(crypto.compute_message_hash(payloadblob['signature']))
return payloadblob
def verify_state_encryption_key_signature(encrypted_state_key, secret_list,
contract_id, creator_id, signature,
enclave_keys):
"""verify the signature on the contract state encryption key received from the enclave
:param encrypted_state_key; base64 encoded string
:param secret_list: array of dictionary defines values for pspk and encrypted_secret
:param contract_id: 16 character, hex encoded, sha256 hashed, registration transaction signature
:param creator_id: PEM encoded ECDSA verifying key
:param signature: base64 encoded signature
:param enclave_keys: object of type :EnclaveKeys:
"""
message = serialize_for_signing(encrypted_state_key, secret_list,
contract_id, creator_id)
logger.debug(
"signed message has length %d and hash %s", len(message),
crypto.byte_array_to_base64(crypto.compute_message_hash(message)))
return enclave_keys.verify(message, signature, encoding='b64')
def CreateAndRegisterContract(config, enclave, contract_creator_keys):
global txn_dependencies
data_dir = config['PDO']['DataPath']
ledger_config = config.get('Sawtooth')
contract_creator_id = contract_creator_keys.identity
contract_name = config['contract']
contract_code = contract_helper.ContractCode.create_from_scheme_file(
contract_name, search_path=[".", "..", "contracts"])
# create the provisioning servers
if use_pservice:
pservice_urls = config.get("pservice-urls")
provisioning_services = list(
map(lambda url: pservice_helper.ProvisioningServiceClient(url),
pservice_urls))
else:
provisioning_services = secret_helper.create_provisioning_services(
config['secrets'])
provisioning_service_keys = list(
map(lambda svc: svc.identity, provisioning_services))
try:
if use_ledger:
contract_id = contract_helper.register_contract(
ledger_config, contract_creator_keys, contract_code,
provisioning_service_keys)
logger.info('contract registration successful; %s', contract_id)
else:
contract_id = crypto.byte_array_to_base64(
crypto.compute_message_hash(crypto.random_bit_string(256)))
logger.info('no ledger config; skipping contract registration')
except Exception as e:
logger.error('failed to register the contract; %s', str(e))
sys.exit(-1)
contract_state = contract_helper.ContractState.create_new_state(
contract_id)
contract = contract_helper.Contract(contract_code, contract_state,
contract_id, contract_creator_id)
# --------------------------------------------------
logger.info('create the provisioning secrets')
# --------------------------------------------------
if use_pservice:
secret_list = []
for pservice in provisioning_services:
logger.debug('ask pservice %s to generate a secret for %s',
pservice.ServiceURL, contract_id)
message = enclave.enclave_id + contract_id
signature = contract_creator_keys.sign(message, encoding='hex')
secret = pservice.get_secret(enclave.enclave_id, contract_id,
contract_creator_keys.verifying_key,
signature)
if secret is None:
logger.error('failed to create secret for %s',
pservice.ServiceURL)
sys.exit(-1)
secret_list.append(secret)
else:
secret_list = secret_helper.create_secrets_for_services(
provisioning_services, enclave.enclave_keys, contract_id,
contract_creator_id)
logger.debug('secrets: %s', secret_list)
try:
secretinfo = enclave.verify_secrets(contract_id, contract_creator_id,
secret_list)
assert secretinfo
encrypted_state_encryption_key = secretinfo[
'encrypted_state_encryption_key']
signature = secretinfo['signature']
except Exception as e:
logger.error('failed to create the state encryption key; %s', str(e))
sys.exit(-1)
try:
if not secrets.verify_state_encryption_key_signature(
encrypted_state_encryption_key, secret_list, contract_id,
contract_creator_id, signature, enclave.enclave_keys):
raise RuntimeError('signature verification failed')
except Exception as e:
logger.error('failed to verify the state encryption key; %s', str(e))
sys.exit(-1)
logger.info('encrypted state encryption key: %s',
encrypted_state_encryption_key)
# --------------------------------------------------
logger.info('add the provisioned enclave to the contract')
# --------------------------------------------------
try:
if use_ledger:
txnid = contract_helper.add_enclave_to_contract(
ledger_config,
contract_creator_keys,
contract_id,
enclave.enclave_id,
secret_list,
encrypted_state_encryption_key,
signature,
transaction_dependency_list=txn_dependencies)
txn_dependencies = [txnid]
logger.info('contract state encryption key added to contract')
else:
logger.info(
'no ledger config; skipping state encryption key registration')
except Exception as e:
logger.error('failed to add state encryption key; %s', str(e))
sys.exit(-1)
contract.set_state_encryption_key(enclave.enclave_id,
encrypted_state_encryption_key)
contract.save_to_file(contract_name, data_dir=data_dir)
# --------------------------------------------------
logger.info('create the initial contract state')
# --------------------------------------------------
try:
initialize_request = contract.create_initialize_request(
contract_creator_keys, enclave)
initialize_response = initialize_request.evaluate()
contract.set_state(initialize_response.encrypted_state)
except Exception as e:
logger.error('failed to create the initial state; %s', str(e))
sys.exit(-1)
logger.info('enclave created initial state')
# --------------------------------------------------
logger.info('save the initial state in the ledger')
# --------------------------------------------------
try:
if use_ledger:
logger.info("sending to ledger")
# note that we will wait for commit of the transaction before
# continuing; this is not necessary in general (if there is
# confidence the transaction will succeed) but is useful for
# testing
txnid = initialize_response.submit_initialize_transaction(
ledger_config,
wait=30,
transaction_dependency_list=txn_dependencies)
txn_dependencies = [txnid]
else:
logger.info('no ledger config; skipping iniatialize state save')
except Exception as e:
logger.error('failed to save the initial state; %s', str(e))
sys.exit(-1)
contract.contract_state.save_to_cache(data_dir=data_dir)
return contract
def hashed_identity(self):
key_byte_array = crypto.string_to_byte_array(self.txn_public)
hashed_txn_key = crypto.compute_message_hash(key_byte_array)
encoded_hashed_key = crypto.byte_array_to_hex(hashed_txn_key)
encoded_hashed_key = encoded_hashed_key.lower()
return encoded_hashed_key
"Symmetric decryption (random IV) invalid key detection test successful!"
)
else:
logger.error(
"ERROR: Symmetric decryption (random IV) invalid key detection test failed: ",
exc)
sys.exit(-1)
try:
iv = crypto.SKENC_GenerateIV("A message")
except Exception as exc:
logger.error(
"ERROR: Symmetric encryption deterministic iv generation test failed: ",
exc)
sys.exit(-1)
logger.debug(
"Symmetric encryption deterministic iv generation test successful!")
try:
rand = crypto.random_bit_string(16)
except Exception as exc:
logger.error("ERROR: Random number generation failed: ", exc)
sys.exit(-1)
logger.debug("Random number generation successful!")
hash = crypto.compute_message_hash(rand)
bhash = bytearray(hash)
b64hash = crypto.byte_array_to_base64(bhash)
logger.debug("Hash computed!")
crypto.base64_to_byte_array(b64hash)
logger.debug("SWIG CRYPTO_WRAPPER TEST SUCCESSFUL!")
sys.exit(0)
def CreateAndRegisterContract(config, enclaves, contract_creator_keys):
global txn_dependencies
data_dir = config['Contract']['DataDirectory']
ledger_config = config.get('Sawtooth')
contract_creator_id = contract_creator_keys.identity
try:
contract_class = config['Contract']['Name']
contract_source = config['Contract']['SourceFile']
source_path = config['Contract']['SourceSearchPath']
interpreter = config['Contract']['Interpreter']
contract_code = contract_helper.ContractCode.create_from_file(
contract_class,
contract_source,
source_path,
interpreter=interpreter)
except Exception as e:
raise Exception('unable to load contract source; {0}'.format(str(e)))
# create the provisioning servers
if use_pservice:
try:
pservice_urls = config['Service']['ProvisioningServiceURLs']
provisioning_services = list(
map(lambda url: pservice_helper.ProvisioningServiceClient(url),
pservice_urls))
except Exception as e:
logger.error('failed to connect to provisioning service; %s',
str(e))
ErrorShutdown()
else:
provisioning_services = secret_helper.create_provisioning_services(
config['secrets'])
provisioning_service_keys = list(
map(lambda svc: svc.identity, provisioning_services))
try:
if use_ledger:
contract_id = contract_helper.register_contract(
ledger_config, contract_creator_keys, contract_code,
provisioning_service_keys)
logger.info('contract registration successful; %s', contract_id)
else:
contract_id = crypto.byte_array_to_base64(
crypto.compute_message_hash(crypto.random_bit_string(256)))
logger.debug('no ledger config; skipping contract registration')
except Exception as e:
logger.error('failed to register the contract; %s', str(e))
ErrorShutdown()
contract_state = contract_helper.ContractState.create_new_state(
contract_id)
contract = contract_helper.Contract(contract_code, contract_state,
contract_id, contract_creator_id)
# --------------------------------------------------
logger.info('create the provisioning secrets')
# --------------------------------------------------
encrypted_state_encryption_keys = AddEnclaveSecrets(
ledger_config, contract.contract_id, contract_creator_keys, enclaves,
provisioning_services)
for enclave_id in encrypted_state_encryption_keys:
encrypted_key = encrypted_state_encryption_keys[enclave_id]
contract.set_state_encryption_key(enclave_id, encrypted_key)
#add replication information to contract
AddReplicationParamsToContract(config, enclaves, contract)
# Decide if the contract use a fixed enclave or a randomized one for each update.
if use_eservice and config['Service']['Randomize_Eservice']:
enclave_to_use = 'random'
else:
enclave_to_use = enclaves[0]
# save the contract info as a pdo file
contract_save_file = '_' + contract.short_id + '.pdo'
contract.save_to_file(contract_save_file, data_dir=data_dir)
# --------------------------------------------------
logger.info('create the initial contract state')
# --------------------------------------------------
try:
initialize_request = contract.create_initialize_request(
contract_creator_keys, enclave_to_use)
initialize_response = initialize_request.evaluate()
if initialize_response.status is False:
logger.error('contract initialization failed: %s',
initialize_response.invocation_response)
ErrorShutdown()
contract.set_state(initialize_response.raw_state)
except Exception as e:
logger.error('failed to create the initial state; %s', str(e))
ErrorShutdown()
logger.info('Created initial state')
# submit the commit task: (a commit task replicates change-set and submits the corresponding transaction)
try:
initialize_response.commit_asynchronously(ledger_config)
except Exception as e:
logger.exception(
'failed to asynchronously start replication and transaction submission:'
+ str(e))
ErrorShutdown()
# wait for the commit to finish.
try:
txn_id = initialize_response.wait_for_commit()
if use_ledger and txn_id is None:
logger.error("Did not receive txn id for the initial commit")
ErrorShutdown()
except Exception as e:
logger.error(str(e))
ErrorShutdown()
contract.contract_state.save_to_cache(data_dir=data_dir)
return contract
def compute_hash(self):
serialized = self.__serialize_for_hashing()
report_hash = crypto.compute_message_hash(serialized)
# the contract code class expects a string when serializing
# for hashing, so use Base64 encoding
return crypto.byte_array_to_base64(report_hash)
def compute_hash(self):
return crypto.compute_message_hash(
crypto.string_to_byte_array(self.serialize_for_hash()))
