def test_final_hash(self): """ testing final_hash() with an arbitrary return value of Hello World to verify it is true as well as testing that if you give function empty string, it still hashes properly """ test_val = crypto.final_hash("Hello World") expected_hash = "e63006bd9f35f06cd20582fc8b34ae76a15080297be886decd6dfd42f59e5174a537e8cd92ef577297f967beb6b758c1835f4c270c251e10c12331fcd8635c53" self.assertEquals(test_val, expected_hash) self.assertFalse(crypto.final_hash("") == "")
def _execute_phase_3(self, config, phase_2_info): """ * At this point, any participating processing nodes will have appended signed Phase 2 verification proof to the block. * Processing nodes participating in Phase 3 Verification may be a different set of nodes than the set of nodes participating in Phase 1 and Phase 2 Verification processes. * Processing nodes may be defined for the sole purpose of Phase 3 verification (e.g. for independent blockchain verification auditing purposes). * A participating node will verify that no invalid transaction has been included in the set of approved transaction. * A participating node will verify that all "approved" transactions are signed by their respective owner. * A node may perform extra validation steps on all transactions and verification units. * All signed "Phase 3 Signature Structures" will be grouped, concatenated, and cryptographically signed by the node. """ phase = 3 phase_2_record = phase_2_info['record'] p2_verification_info = phase_2_info['verification_info'] phase_2_record['verification_info'] = p2_verification_info prior_block_hash = self.get_prior_hash(phase_2_record[ORIGIN_ID], phase) # validate phase_2's verification record if validate_verification_record(phase_2_record, p2_verification_info): # storing valid verification record verification_db.insert_verification(phase_2_record) # retrieve all phase 2 records for current block phase_2_records = self.get_sig_records(phase_2_record) signatories, businesses, locations = self.get_verification_diversity(phase_2_records) # checking if passed requirements to move on to next phase if len(signatories) >= P2_COUNT_REQ and len(businesses) >= P2_BUS_COUNT_REQ and len(locations) >= P2_LOC_COUNT_REQ: # updating record phase phase_2_record[PHASE] = phase lower_hashes = [record[SIGNATURE]['signatory'] + ":" + record[SIGNATURE][HASH] for record in phase_2_records] verification_info = { 'lower_hashes': lower_hashes, 'p2_count': len(signatories), 'businesses': list(businesses), 'deploy_locations': list(locations) } lower_hash = str(final_hash(lower_hashes)) # sign verification and rewrite record block_info = sign_verification_record(self.network.this_node.node_id, prior_block_hash, lower_hash, self.service_config['public_key'], self.service_config['private_key'], phase_2_record[BLOCK_ID], phase_2_record[PHASE], phase_2_record[ORIGIN_ID], int(time.time()), phase_2_record['public_transmission'], verification_info ) # inserting verification info after signing verification_id = str(uuid.uuid4()) verification_db.insert_verification(block_info['verification_record'], verification_id) # inserting receipt for each phase 2 record received for record in phase_2_records: vr_transfers_db.insert_transfer(record['origin_id'], record['signature']['signatory'], verification_id) # send block info off for public transmission if configured to do so if phase_2_record['public_transmission']['p3_pub_trans']: self.network.public_broadcast(block_info, phase) # send block info for phase 4 validation self.network.send_block(self.network.phase_3_broadcast, block_info, phase) print "phase 3 executed"
def _execute_phase_1(self, config, current_block_id): """ TODO update all EXEC comments/docs * Each node gathers all transactions that may be included in the prospective block and groups them by transaction owner. * All transactions owned (or sourced from) a respective node's business unit or system (owned) are grouped for approval. * All transactions not owned by the node's business unit or system (others) are grouped for validation. * All owned transactions are verified per business rules, configurable, (e.g, existence or non-existence of particular fields, with field value validation logic). * All owned and verified transactions are "approved" by executing the Transaction Verification Signing Process defined below. * Any transactions deemed "unapproved" will be taken out of the prospective block from a node's perspective by non-inclusion in the signing process, and sent to a system "pool" or "queue" for analysis and alternate processing * All other (non-owned) transactions are validated to system wide rules agreed upon for all nodes through business and system processes. * All other (non-owned) transactions are declared "valid" by the node by executing the Transaction Verification Signing Process defined below. * Any transactions deemed "invalid" will be taken out of the prospective block from a node's perspective by non-inclusion in the signing process, and sent to a system "pool" or "queue" for analysis and alternate processing. """ print("Phase 1 Verify Start.") # Group transactions for last 5 seconds into current block id block_bound_lower_ts = get_block_time(current_block_id - BLOCK_FIXATE_OFFSET) print ("""Time bounds: %i - %i""" % (block_bound_lower_ts, block_bound_lower_ts + BLOCK_INTERVAL)) transaction_db.fixate_block(block_bound_lower_ts, block_bound_lower_ts + BLOCK_INTERVAL, current_block_id) if 'approve_block' in config: return config['approve_block'](config, current_block_id) transactions = transaction_db.get_all(block_id=current_block_id) # Validate the schema and structure of the transactions valid_transactions, invalid_transactions = self.split_items(valid_transaction_sig, transactions) # Use the custom approval code if configured, otherwise approve all valid transaction rejected_transactions = [] if 'approve_transaction' in config: approved_transactions, rejected_transactions = \ self.split_items(config['approve_transaction'], valid_transactions) else: approved_transactions = valid_transactions if len(approved_transactions) > 0: # update status of approved transactions for tx in approved_transactions: tx["header"]["status"] = "approved" transaction_db.update_transaction(tx) # stripping payload from all transactions before signing self.strip_payload(approved_transactions) phase = 1 # signatory equals origin_id in phase 1 signatory = origin_id = self.network.this_node.node_id prior_block_hash = self.get_prior_hash(origin_id, phase) verification_info = approved_transactions lower_hash = str(final_hash([0])) # sign approved transactions block_info = sign_verification_record(signatory, prior_block_hash, lower_hash, self.service_config['public_key'], self.service_config['private_key'], current_block_id, phase, origin_id, int(time.time()), self.public_transmission, verification_info) # store signed phase specific data verification_id = str(uuid.uuid4()) verification_db.insert_verification(block_info['verification_record'], verification_id) # send block info off for public transmission if configured to do so if block_info['verification_record']['public_transmission']['p1_pub_trans']: self.network.public_broadcast(block_info, phase) # send block info for phase 2 validation self.network.send_block(self.network.phase_1_broadcast, block_info, phase) print("Phase 1 signed " + str(len(approved_transactions)) + " transactions") # update status transactions that were rejected if len(rejected_transactions) > 0: for tx in rejected_transactions: tx["header"]["status"] = "rejected" transaction_db.update_transaction(tx)
def _execute_timestamping(self, config): """ verification_info = { 'verification_records': { origin_id: { 'timestamp_id': hash } }, 'blockchain_type': "BTC" } """ hashes = [] verification_info = { 'verification_records': {}, 'blockchain_type': "BTC" } pending_records = timestamp_db.get_pending_timestamp() # returns out of the function if there are no records waiting to be broadcast if not pending_records: return # creates a list of hashes as well as builds the verification_info structure for r in pending_records: hashes.append(r['signature']['hash']) # organizes the verification records by origin_id with a dictionary of timestamp_ids and hashes if r['origin_id'] not in verification_info['verification_records']: verification_info['verification_records'][r['origin_id']] = {} verification_info['verification_records'][r['origin_id']][r['timestamp_id']] = r['signature']['hash'] # takes the list of hashes to be transmitted and hashes with 256 bit to get in form to send transaction_hash = final_hash(hashes, type=256) # normal SHA512 hash for all lower VR contents lower_hash = final_hash(hashes) # sets the hash in the verification_info structure to the hash we just generated verification_info['hash'] = transaction_hash stamper = BitcoinTimestamper(self.service_config['bitcoin_network'], BitcoinFeeProvider()) bitcoin_tx_id = stamper.persist("%s%s" % (LEVEL5_PREFIX, transaction_hash)) bitcoin_tx_id = b2lx(bitcoin_tx_id).encode('utf-8') verification_info['public_transaction_id'] = bitcoin_tx_id prior_block_hash = None # This is the hash of all of the lower elements block_id = None phase = 5 origin_id = None public_transmission = False block_info = sign_verification_record(self.network.this_node.node_id, prior_block_hash, lower_hash, self.service_config['public_key'], self.service_config['private_key'], block_id, phase, origin_id, int(time.time()), public_transmission, verification_info ) # inserts a new verification record for the new record created to be sent verification_db.insert_verification(block_info['verification_record']) # sets the timestamp_receipt to true to indicate the records have been sent for origin_id in verification_info['verification_records'].keys(): for verification_id in verification_info['verification_records'][origin_id]: timestamp_db.set_transaction_timestamp_proof(verification_id) # dictionary where the key is origin_id and the value is list of signatories sent from that origin_id unique_vr_transfers = {} # creates a verification_record for each unique origin_id-signatory pair for verification_record in pending_records: if not verification_record['origin_id'] in unique_vr_transfers: unique_vr_transfers[verification_record['origin_id']] = [] # inserts a single record per origin_id if verification_record['signature']['signatory'] not in unique_vr_transfers[verification_record['origin_id']]: vr_transfers_db.insert_transfer(verification_record['origin_id'], verification_record['signature']['signatory'], verification_record['timestamp_id']) unique_vr_transfers[verification_record['origin_id']].append(verification_record['signature']['signatory'])
def _execute_phase_1(self, config, current_block_id): """ TODO update all EXEC comments/docs * Each node gathers all transactions that may be included in the prospective block and groups them by transaction owner. * All transactions owned (or sourced from) a respective node's business unit or system (owned) are grouped for approval. * All transactions not owned by the node's business unit or system (others) are grouped for validation. * All owned transactions are verified per business rules, configurable, (e.g, existence or non-existence of particular fields, with field value validation logic). * All owned and verified transactions are "approved" by executing the Transaction Verification Signing Process defined below. * Any transactions deemed "unapproved" will be taken out of the prospective block from a node's perspective by non-inclusion in the signing process, and sent to a system "pool" or "queue" for analysis and alternate processing * All other (non-owned) transactions are validated to system wide rules agreed upon for all nodes through business and system processes. * All other (non-owned) transactions are declared "valid" by the node by executing the Transaction Verification Signing Process defined below. * Any transactions deemed "invalid" will be taken out of the prospective block from a node's perspective by non-inclusion in the signing process, and sent to a system "pool" or "queue" for analysis and alternate processing. """ print("Phase 1 Verify Start.") # Group transactions for last 5 seconds into current block id block_bound_lower_ts = get_block_time(current_block_id - BLOCK_FIXATE_OFFSET) print ("""Time bounds: %i - %i""" % (block_bound_lower_ts, block_bound_lower_ts + BLOCK_INTERVAL)) transaction_db.fixate_block(block_bound_lower_ts, block_bound_lower_ts + BLOCK_INTERVAL, current_block_id) transactions = transaction_db.get_all(block_id=current_block_id) # Validate the schema and structure of the transactions valid_transactions, invalid_transactions = self.split_items(valid_transaction_sig, transactions) rejected_transactions = [] approved_transactions = [] for txn in valid_transactions: if self.handle_transaction(txn): approved_transactions.append(txn) else: rejected_transactions.append(txn) if len(approved_transactions) > 0: # update status of approved transactions for tx in approved_transactions: tx["header"]["status"] = "approved" transaction_db.update_transaction(tx) # stripping payload from all transactions before signing self.strip_payload(approved_transactions) phase = 1 # signatory equals origin_id in phase 1 signatory = origin_id = self.network.this_node.node_id prior_block_hash = self.get_prior_hash(origin_id, phase) verification_info = approved_transactions lower_hash = str(final_hash([0])) # sign approved transactions block_info = sign_verification_record(signatory, prior_block_hash, lower_hash, self.service_config['public_key'], self.service_config['private_key'], current_block_id, phase, origin_id, int(time.time()), self.public_transmission, verification_info) # store signed phase specific data verification_id = str(uuid.uuid4()) verification_db.insert_verification(block_info['verification_record'], verification_id) # send block info off for public transmission if configured to do so if block_info['verification_record']['public_transmission']['p1_pub_trans']: self.network.public_broadcast(block_info, phase) # send block info for phase 2 validation self.network.send_block(self.network.phase_1_broadcast, block_info, phase) print("Phase 1 signed " + str(len(approved_transactions)) + " transactions") # update status transactions that were rejected if len(rejected_transactions) > 0: for tx in rejected_transactions: tx["header"]["status"] = "rejected" transaction_db.update_transaction(tx)