def AddEnclaveSecrets(ledger_config, contract_id, client_keys, enclaves,
provclients):
secrets = {}
encrypted_state_encryption_keys = {}
for enclave in enclaves:
if use_pservice:
psecrets = []
for provclient in provclients:
# Get a pspk:esecret pair from the provisioning service for each enclave
sig_payload = crypto.string_to_byte_array(enclave.enclave_id +
contract_id)
secretinfo = provclient.get_secret(
enclave.enclave_id, contract_id, client_keys.verifying_key,
client_keys.sign(sig_payload))
logger.debug("pservice secretinfo: %s", secretinfo)
# Add this pspk:esecret pair to the list
psecrets.append(secretinfo)
else:
psecrets = secret_helper.create_secrets_for_services(
provclients, enclave.enclave_keys, contract_id,
client_keys.identity)
# Print all of the secret pairs generated for this particular enclave
logger.debug('psecrets for enclave %s : %s', enclave.enclave_id,
psecrets)
# Verify those secrets with the enclave
esresponse = enclave.verify_secrets(contract_id,
client_keys.verifying_key,
psecrets)
logger.debug("verify_secrets response: %s", esresponse)
# Store the ESEK mapping in a dictionary key'd by the enclave's public key (ID)
encrypted_state_encryption_keys[
enclave.enclave_id] = esresponse['encrypted_state_encryption_key']
# Add this spefiic enclave to the contract
if use_ledger:
contract_helper.add_enclave_to_contract(
ledger_config, client_keys, contract_id, enclave.enclave_id,
psecrets, esresponse['encrypted_state_encryption_key'],
esresponse['signature'])
return encrypted_state_encryption_keys
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