""" Security Validation Tests for AITBC Mesh Network Tests security requirements and attack prevention mechanisms """ import pytest import asyncio import time import hashlib import json from unittest.mock import Mock, patch, AsyncMock from decimal import Decimal import secrets class TestConsensusSecurity: """Test consensus layer security""" @pytest.mark.asyncio async def test_double_signing_detection(self): """Test detection of validator double signing""" # Mock slashing manager mock_slashing = Mock() mock_slashing.detect_double_sign.return_value = Mock( validator_address="0xvalidator1", block_height=100, block_hash_1="hash1", block_hash_2="hash2", timestamp=time.time() ) # Simulate double signing validator_address = "0xvalidator1" block_height = 100 block_hash_1 = "hash1" block_hash_2 = "hash2" # Different hash for same block # Detect double signing event = mock_slashing.detect_double_sign(validator_address, block_hash_1, block_hash_2, block_height) assert event is not None assert event.validator_address == validator_address assert event.block_height == block_height assert event.block_hash_1 == block_hash_1 assert event.block_hash_2 == block_hash_2 # Verify slashing action mock_slashing.apply_slash.assert_called_once_with(validator_address, 0.1, "Double signing detected") @pytest.mark.asyncio async def test_validator_key_compromise_detection(self): """Test detection of compromised validator keys""" # Mock key manager mock_key_manager = Mock() mock_key_manager.verify_signature.return_value = False # Signature verification fails # Mock consensus mock_consensus = Mock() mock_consensus.validators = {"0xvalidator1": Mock(public_key="valid_key")} # Simulate invalid signature message = "test message" signature = "invalid_signature" validator_address = "0xvalidator1" # Verify signature fails valid = mock_key_manager.verify_signature(validator_address, message, signature) assert valid is False # Should trigger key compromise detection mock_consensus.handle_key_compromise.assert_called_once_with(validator_address) @pytest.mark.asyncio async def test_byzantine_fault_tolerance(self): """Test Byzantine fault tolerance in consensus""" # Test with 1/3 faulty validators total_validators = 9 faulty_validators = 3 # 1/3 of total # Mock consensus state mock_consensus = Mock() mock_consensus.total_validators = total_validators mock_consensus.faulty_validators = faulty_validators mock_consensus.min_honest_validators = total_validators - faulty_validators # Check if consensus can tolerate faults can_tolerate = mock_consensus.faulty_validators < (mock_consensus.total_validators // 3) assert can_tolerate is True, "Should tolerate 1/3 faulty validators" assert mock_consensus.min_honest_validators >= 2 * faulty_validators + 1, "Not enough honest validators" @pytest.mark.asyncio async def test_consensus_state_integrity(self): """Test consensus state integrity and tampering detection""" # Mock consensus state consensus_state = { "block_height": 100, "validators": ["v1", "v2", "v3"], "current_proposer": "v1", "round": 5 } # Calculate state hash state_json = json.dumps(consensus_state, sort_keys=True) original_hash = hashlib.sha256(state_json.encode()).hexdigest() # Simulate state tampering tampered_state = consensus_state.copy() tampered_state["block_height"] = 999 # Tampered value # Calculate tampered hash tampered_json = json.dumps(tampered_state, sort_keys=True) tampered_hash = hashlib.sha256(tampered_json.encode()).hexdigest() # Verify tampering detection assert original_hash != tampered_hash, "Hashes should differ for tampered state" # Mock integrity checker mock_integrity = Mock() mock_integrity.verify_state_hash.return_value = (original_hash == tampered_hash) is_valid = mock_integrity.verify_state_hash(tampered_state, tampered_hash) assert is_valid is False, "Tampered state should be detected" @pytest.mark.asyncio async def test_validator_rotation_security(self): """Test security of validator rotation process""" # Mock rotation manager mock_rotation = Mock() mock_rotation.get_next_proposer.return_value = "v2" mock_rotation.validate_rotation.return_value = True # Test secure rotation current_proposer = "v1" next_proposer = mock_rotation.get_next_proposer() assert next_proposer != current_proposer, "Next proposer should be different" # Validate rotation is_valid = mock_rotation.validate_rotation(current_proposer, next_proposer) assert is_valid is True, "Rotation should be valid" # Test rotation cannot be manipulated mock_rotation.prevent_manipulation.assert_called_once() class TestNetworkSecurity: """Test network layer security""" @pytest.mark.asyncio async def test_peer_authentication(self): """Test peer authentication and identity verification""" # Mock peer authentication mock_auth = Mock() mock_auth.authenticate_peer.return_value = True # Test valid peer authentication peer_id = "peer_123" public_key = "valid_public_key" signature = "valid_signature" is_authenticated = mock_auth.authenticate_peer(peer_id, public_key, signature) assert is_authenticated is True # Test invalid authentication mock_auth.authenticate_peer.return_value = False is_authenticated = mock_auth.authenticate_peer(peer_id, "invalid_key", "invalid_signature") assert is_authenticated is False @pytest.mark.asyncio async def test_message_encryption(self): """Test message encryption and decryption""" # Mock encryption service mock_encryption = Mock() mock_encryption.encrypt_message.return_value = "encrypted_data" mock_encryption.decrypt_message.return_value = "original_message" # Test encryption original_message = "sensitive_data" encrypted = mock_encryption.encrypt_message(original_message, "recipient_key") assert encrypted != original_message, "Encrypted message should differ from original" # Test decryption decrypted = mock_encryption.decrypt_message(encrypted, "recipient_key") assert decrypted == original_message, "Decrypted message should match original" @pytest.mark.asyncio async def test_sybil_attack_prevention(self): """Test prevention of Sybil attacks""" # Mock Sybil attack detector mock_detector = Mock() mock_detector.detect_sybil_attack.return_value = False mock_detector.get_unique_peers.return_value = 10 # Test normal peer distribution unique_peers = mock_detector.get_unique_peers() is_sybil = mock_detector.detect_sybil_attack() assert unique_peers >= 5, "Should have sufficient unique peers" assert is_sybil is False, "No Sybil attack detected" # Simulate Sybil attack mock_detector.get_unique_peers.return_value = 2 # Very few unique peers mock_detector.detect_sybil_attack.return_value = True unique_peers = mock_detector.get_unique_peers() is_sybil = mock_detector.detect_sybil_attack() assert unique_peers < 5, "Insufficient unique peers indicates potential Sybil attack" assert is_sybil is True, "Sybil attack should be detected" @pytest.mark.asyncio async def test_ddos_protection(self): """Test DDoS attack protection mechanisms""" # Mock DDoS protection mock_protection = Mock() mock_protection.check_rate_limit.return_value = True mock_protection.get_request_rate.return_value = 100 # Test normal request rate request_rate = mock_protection.get_request_rate() can_proceed = mock_protection.check_rate_limit("client_ip") assert request_rate < 1000, "Request rate should be within limits" assert can_proceed is True, "Normal requests should proceed" # Simulate DDoS attack mock_protection.get_request_rate.return_value = 5000 # High request rate mock_protection.check_rate_limit.return_value = False request_rate = mock_protection.get_request_rate() can_proceed = mock_protection.check_rate_limit("client_ip") assert request_rate > 1000, "High request rate indicates DDoS" assert can_proceed is False, "DDoS requests should be blocked" @pytest.mark.asyncio async def test_network_partition_security(self): """Test security during network partitions""" # Mock partition manager mock_partition = Mock() mock_partition.is_partitioned.return_value = True mock_partition.get_partition_size.return_value = 3 mock_partition.get_total_nodes.return_value = 10 # Test partition detection is_partitioned = mock_partition.is_partitioned() partition_size = mock_partition.get_partition_size() total_nodes = mock_partition.get_total_nodes() assert is_partitioned is True, "Partition should be detected" assert partition_size < total_nodes, "Partition should be smaller than total network" # Test security measures during partition partition_ratio = partition_size / total_nodes assert partition_ratio > 0.3, "Partition should be large enough to maintain security" # Should enter safe mode during partition mock_partition.enter_safe_mode.assert_called_once() class TestEconomicSecurity: """Test economic layer security""" @pytest.mark.asyncio async def test_staking_slashing_conditions(self): """Test staking slashing conditions and enforcement""" # Mock staking manager mock_staking = Mock() mock_staking.get_validator_stake.return_value = Decimal('1000.0') mock_staking.slash_validator.return_value = (True, "Slashed 100 tokens") # Test slashing conditions validator_address = "0xvalidator1" slash_percentage = 0.1 # 10% reason = "Double signing" # Apply slash success, message = mock_staking.slash_validator(validator_address, slash_percentage, reason) assert success is True, "Slashing should succeed" assert "Slashed" in message, "Slashing message should be returned" # Verify stake reduction original_stake = mock_staking.get_validator_stake(validator_address) expected_slash_amount = original_stake * Decimal(str(slash_percentage)) mock_staking.slash_validator.assert_called_once_with(validator_address, slash_percentage, reason) @pytest.mark.asyncio async def test_reward_manipulation_prevention(self): """Test prevention of reward manipulation""" # Mock reward distributor mock_rewards = Mock() mock_rewards.validate_reward_claim.return_value = True mock_rewards.calculate_reward.return_value = Decimal('10.0') # Test normal reward claim validator_address = "0xvalidator1" block_height = 100 is_valid = mock_rewards.validate_reward_claim(validator_address, block_height) reward_amount = mock_rewards.calculate_reward(validator_address, block_height) assert is_valid is True, "Valid reward claim should pass validation" assert reward_amount > 0, "Reward amount should be positive" # Test manipulation attempt mock_rewards.validate_reward_claim.return_value = False # Invalid claim is_valid = mock_rewards.validate_reward_claim(validator_address, block_height + 1) # Wrong block assert is_valid is False, "Invalid reward claim should be rejected" @pytest.mark.asyncio async def test_gas_price_manipulation(self): """Test prevention of gas price manipulation""" # Mock gas manager mock_gas = Mock() mock_gas.get_current_gas_price.return_value = Decimal('0.001') mock_gas.validate_gas_price.return_value = True mock_gas.detect_manipulation.return_value = False # Test normal gas price current_price = mock_gas.get_current_gas_price() is_valid = mock_gas.validate_gas_price(current_price) is_manipulated = mock_gas.detect_manipulation() assert current_price > 0, "Gas price should be positive" assert is_valid is True, "Normal gas price should be valid" assert is_manipulated is False, "Normal gas price should not be manipulated" # Test manipulated gas price manipulated_price = Decimal('100.0') # Extremely high price mock_gas.validate_gas_price.return_value = False mock_gas.detect_manipulation.return_value = True is_valid = mock_gas.validate_gas_price(manipulated_price) is_manipulated = mock_gas.detect_manipulation() assert is_valid is False, "Manipulated gas price should be invalid" assert is_manipulated is True, "Gas price manipulation should be detected" @pytest.mark.asyncio async def test_economic_attack_detection(self): """Test detection of various economic attacks""" # Mock security monitor mock_monitor = Mock() mock_monitor.detect_attack.return_value = None # No attack # Test normal operation attack_type = "nothing_at_stake" evidence = {"validator_activity": "normal"} attack = mock_monitor.detect_attack(attack_type, evidence) assert attack is None, "No attack should be detected in normal operation" # Test attack detection mock_monitor.detect_attack.return_value = Mock( attack_type="nothing_at_stake", severity="high", evidence={"validator_activity": "abnormal"} ) attack = mock_monitor.detect_attack(attack_type, {"validator_activity": "abnormal"}) assert attack is not None, "Attack should be detected" assert attack.attack_type == "nothing_at_stake", "Attack type should match" assert attack.severity == "high", "Attack severity should be high" class TestAgentNetworkSecurity: """Test agent network security""" @pytest.mark.asyncio async def test_agent_authentication(self): """Test agent authentication and authorization""" # Mock agent registry mock_registry = Mock() mock_registry.authenticate_agent.return_value = True mock_registry.check_permissions.return_value = ["text_generation"] # Test valid agent authentication agent_id = "agent_123" credentials = {"api_key": "valid_key", "signature": "valid_signature"} is_authenticated = mock_registry.authenticate_agent(agent_id, credentials) assert is_authenticated is True, "Valid agent should be authenticated" # Test permissions permissions = mock_registry.check_permissions(agent_id, "text_generation") assert "text_generation" in permissions, "Agent should have required permissions" # Test invalid authentication mock_registry.authenticate_agent.return_value = False is_authenticated = mock_registry.authenticate_agent(agent_id, {"api_key": "invalid"}) assert is_authenticated is False, "Invalid agent should not be authenticated" @pytest.mark.asyncio async def test_agent_reputation_security(self): """Test security of agent reputation system""" # Mock reputation manager mock_reputation = Mock() mock_reputation.get_reputation_score.return_value = 0.9 mock_reputation.validate_reputation_update.return_value = True # Test normal reputation update agent_id = "agent_123" event_type = "job_completed" score_change = 0.1 is_valid = mock_reputation.validate_reputation_update(agent_id, event_type, score_change) current_score = mock_reputation.get_reputation_score(agent_id) assert is_valid is True, "Valid reputation update should pass" assert 0 <= current_score <= 1, "Reputation score should be within bounds" # Test manipulation attempt mock_reputation.validate_reputation_update.return_value = False # Invalid update is_valid = mock_reputation.validate_reputation_update(agent_id, "fake_event", 0.5) assert is_valid is False, "Invalid reputation update should be rejected" @pytest.mark.asyncio async def test_agent_communication_security(self): """Test security of agent communication protocols""" # Mock communication protocol mock_protocol = Mock() mock_protocol.encrypt_message.return_value = "encrypted_message" mock_protocol.verify_message_integrity.return_value = True mock_protocol.check_rate_limit.return_value = True # Test message encryption original_message = {"job_id": "job_123", "requirements": {}} encrypted = mock_protocol.encrypt_message(original_message, "recipient_key") assert encrypted != original_message, "Message should be encrypted" # Test message integrity is_integrity_valid = mock_protocol.verify_message_integrity(encrypted, "signature") assert is_integrity_valid is True, "Message integrity should be valid" # Test rate limiting can_send = mock_protocol.check_rate_limit("agent_123") assert can_send is True, "Normal rate should be allowed" # Test rate limit exceeded mock_protocol.check_rate_limit.return_value = False can_send = mock_protocol.check_rate_limit("spam_agent") assert can_send is False, "Exceeded rate limit should be blocked" @pytest.mark.asyncio async def test_agent_behavior_monitoring(self): """Test agent behavior monitoring and anomaly detection""" # Mock behavior monitor mock_monitor = Mock() mock_monitor.detect_anomaly.return_value = None # No anomaly mock_monitor.get_behavior_metrics.return_value = { "response_time": 1.0, "success_rate": 0.95, "error_rate": 0.05 } # Test normal behavior agent_id = "agent_123" metrics = mock_monitor.get_behavior_metrics(agent_id) anomaly = mock_monitor.detect_anomaly(agent_id, metrics) assert anomaly is None, "No anomaly should be detected in normal behavior" assert metrics["success_rate"] >= 0.9, "Success rate should be high" assert metrics["error_rate"] <= 0.1, "Error rate should be low" # Test anomalous behavior mock_monitor.detect_anomaly.return_value = Mock( anomaly_type="high_error_rate", severity="medium", details={"error_rate": 0.5} ) anomalous_metrics = {"success_rate": 0.5, "error_rate": 0.5} anomaly = mock_monitor.detect_anomaly(agent_id, anomalous_metrics) assert anomaly is not None, "Anomaly should be detected" assert anomaly.anomaly_type == "high_error_rate", "Anomaly type should match" assert anomaly.severity == "medium", "Anomaly severity should be medium" class TestSmartContractSecurity: """Test smart contract security""" @pytest.mark.asyncio async def test_escrow_contract_security(self): """Test escrow contract security mechanisms""" # Mock escrow manager mock_escrow = Mock() mock_escrow.validate_contract.return_value = True mock_escrow.check_double_spend.return_value = False mock_escrow.verify_funds.return_value = True # Test contract validation contract_data = { "job_id": "job_123", "amount": Decimal('100.0'), "client": "0xclient", "agent": "0xagent" } is_valid = mock_escrow.validate_contract(contract_data) assert is_valid is True, "Valid contract should pass validation" # Test double spend protection has_double_spend = mock_escrow.check_double_spend("contract_123") assert has_double_spend is False, "No double spend should be detected" # Test fund verification has_funds = mock_escrow.verify_funds("0xclient", Decimal('100.0')) assert has_funds is True, "Sufficient funds should be verified" # Test security breach attempt mock_escrow.validate_contract.return_value = False # Invalid contract is_valid = mock_escrow.validate_contract({"invalid": "contract"}) assert is_valid is False, "Invalid contract should be rejected" @pytest.mark.asyncio async def test_dispute_resolution_security(self): """Test dispute resolution security and fairness""" # Mock dispute resolver mock_resolver = Mock() mock_resolver.validate_dispute.return_value = True mock_resolver.check_evidence_integrity.return_value = True mock_resolver.prevent_bias.return_value = True # Test dispute validation dispute_data = { "contract_id": "contract_123", "reason": "quality_issues", "evidence": [{"type": "screenshot", "hash": "valid_hash"}] } is_valid = mock_resolver.validate_dispute(dispute_data) assert is_valid is True, "Valid dispute should pass validation" # Test evidence integrity evidence_integrity = mock_resolver.check_evidence_integrity(dispute_data["evidence"]) assert evidence_integrity is True, "Evidence integrity should be valid" # Test bias prevention is_unbiased = mock_resolver.prevent_bias("dispute_123", "arbitrator_123") assert is_unbiased is True, "Dispute resolution should be unbiased" # Test manipulation attempt mock_resolver.validate_dispute.return_value = False # Invalid dispute is_valid = mock_resolver.validate_dispute({"manipulated": "dispute"}) assert is_valid is False, "Manipulated dispute should be rejected" @pytest.mark.asyncio async def test_contract_upgrade_security(self): """Test contract upgrade security and governance""" # Mock upgrade manager mock_upgrade = Mock() mock_upgrade.validate_upgrade.return_value = True mock_upgrade.check_governance_approval.return_value = True mock_upgrade.verify_new_code.return_value = True # Test upgrade validation upgrade_proposal = { "contract_type": "escrow", "new_version": "1.1.0", "changes": ["security_fix", "new_feature"], "governance_votes": {"yes": 80, "no": 20} } is_valid = mock_upgrade.validate_upgrade(upgrade_proposal) assert is_valid is True, "Valid upgrade should pass validation" # Test governance approval has_approval = mock_upgrade.check_governance_approval(upgrade_proposal["governance_votes"]) assert has_approval is True, "Upgrade should have governance approval" # Test code verification code_is_safe = mock_upgrade.verify_new_code("new_contract_code") assert code_is_safe is True, "New contract code should be safe" # Test unauthorized upgrade mock_upgrade.validate_upgrade.return_value = False # Invalid upgrade is_valid = mock_upgrade.validate_upgrade({"unauthorized": "upgrade"}) assert is_valid is False, "Unauthorized upgrade should be rejected" @pytest.mark.asyncio async def test_gas_optimization_security(self): """Test gas optimization security and fairness""" # Mock gas optimizer mock_optimizer = Mock() mock_optimizer.validate_optimization.return_value = True mock_optimizer.check_manipulation.return_value = False mock_optimizer.ensure_fairness.return_value = True # Test optimization validation optimization = { "strategy": "batch_operations", "gas_savings": 1000, "implementation_cost": Decimal('0.01') } is_valid = mock_optimizer.validate_optimization(optimization) assert is_valid is True, "Valid optimization should pass validation" # Test manipulation detection is_manipulated = mock_optimizer.check_manipulation(optimization) assert is_manipulated is False, "No manipulation should be detected" # Test fairness is_fair = mock_optimizer.ensure_fairness(optimization) assert is_fair is True, "Optimization should be fair" # Test malicious optimization mock_optimizer.validate_optimization.return_value = False # Invalid optimization is_valid = mock_optimizer.validate_optimization({"malicious": "optimization"}) assert is_valid is False, "Malicious optimization should be rejected" class TestSystemWideSecurity: """Test system-wide security integration""" @pytest.mark.asyncio async def test_cross_layer_security_integration(self): """Test security integration across all layers""" # Mock security coordinators mock_consensus_security = Mock() mock_network_security = Mock() mock_economic_security = Mock() mock_agent_security = Mock() mock_contract_security = Mock() # All layers should report secure status mock_consensus_security.get_security_status.return_value = {"status": "secure", "threats": []} mock_network_security.get_security_status.return_value = {"status": "secure", "threats": []} mock_economic_security.get_security_status.return_value = {"status": "secure", "threats": []} mock_agent_security.get_security_status.return_value = {"status": "secure", "threats": []} mock_contract_security.get_security_status.return_value = {"status": "secure", "threats": []} # Check all layers consensus_status = mock_consensus_security.get_security_status() network_status = mock_network_security.get_security_status() economic_status = mock_economic_security.get_security_status() agent_status = mock_agent_security.get_security_status() contract_status = mock_contract_security.get_security_status() # All should be secure assert consensus_status["status"] == "secure", "Consensus layer should be secure" assert network_status["status"] == "secure", "Network layer should be secure" assert economic_status["status"] == "secure", "Economic layer should be secure" assert agent_status["status"] == "secure", "Agent layer should be secure" assert contract_status["status"] == "secure", "Contract layer should be secure" # No threats detected assert len(consensus_status["threats"]) == 0, "No consensus threats" assert len(network_status["threats"]) == 0, "No network threats" assert len(economic_status["threats"]) == 0, "No economic threats" assert len(agent_status["threats"]) == 0, "No agent threats" assert len(contract_status["threats"]) == 0, "No contract threats" @pytest.mark.asyncio async def test_incident_response_procedures(self): """Test incident response procedures""" # Mock incident response system mock_response = Mock() mock_response.detect_incident.return_value = None # No incident mock_response.classify_severity.return_value = "low" mock_response.execute_response.return_value = (True, "Response executed") # Test normal operation incident = mock_response.detect_incident() assert incident is None, "No incident should be detected" # Simulate security incident mock_response.detect_incident.return_value = Mock( type="security_breach", severity="high", affected_layers=["consensus", "network"], timestamp=time.time() ) incident = mock_response.detect_incident() assert incident is not None, "Security incident should be detected" assert incident.type == "security_breach", "Incident type should match" assert incident.severity == "high", "Incident severity should be high" # Classify severity severity = mock_response.classify_severity(incident) assert severity == "high", "Severity should be classified as high" # Execute response success, message = mock_response.execute_response(incident) assert success is True, "Incident response should succeed" @pytest.mark.asyncio async def test_security_audit_compliance(self): """Test security audit compliance""" # Mock audit system mock_audit = Mock() mock_audit.run_security_audit.return_value = { "overall_score": 95, "findings": [], "compliance_status": "compliant" } # Run security audit audit_results = mock_audit.run_security_audit() assert audit_results["overall_score"] >= 90, "Security score should be high" assert len(audit_results["findings"]) == 0, "No critical security findings" assert audit_results["compliance_status"] == "compliant", "System should be compliant" # Test with findings mock_audit.run_security_audit.return_value = { "overall_score": 85, "findings": [ {"severity": "medium", "description": "Update required"}, {"severity": "low", "description": "Documentation needed"} ], "compliance_status": "mostly_compliant" } audit_results = mock_audit.run_security_audit() assert audit_results["overall_score"] >= 80, "Score should still be acceptable" assert audit_results["compliance_status"] == "mostly_compliant", "Should be mostly compliant" @pytest.mark.asyncio async def test_penetration_testing_resistance(self): """Test resistance to penetration testing attacks""" # Mock penetration test simulator mock_pentest = Mock() mock_pentest.simulate_attack.return_value = {"success": False, "reason": "blocked"} # Test various attack vectors attack_vectors = [ "sql_injection", "xss_attack", "privilege_escalation", "data_exfiltration", "denial_of_service" ] for attack in attack_vectors: result = mock_pentest.simulate_attack(attack) assert result["success"] is False, f"Attack {attack} should be blocked" assert "blocked" in result["reason"], f"Attack {attack} should be blocked" # Test successful defense mock_pentest.get_defense_success_rate.return_value = 0.95 success_rate = mock_pentest.get_defense_success_rate() assert success_rate >= 0.9, "Defense success rate should be high" if __name__ == "__main__": pytest.main([ __file__, "-v", "--tb=short", "--maxfail=5" ])