CHORUS/pkg/crypto/role_crypto_test.go

// Package crypto_test provides comprehensive tests for role-based encryption.
//
// This test suite validates the enterprise-grade security features including:
// - Multi-layer encryption and decryption operations
// - Role-based access control and permission enforcement
// - Key management and rotation procedures
// - Audit logging and compliance monitoring
// - Performance and security benchmarks
// - Edge cases and error handling
//
// Test Categories:
// - Unit tests for individual components
// - Integration tests for end-to-end workflows
// - Security tests for vulnerability assessment
// - Performance tests for scalability validation
// - Compliance tests for regulatory requirements

package crypto

import (
	"context"
	"encoding/json"
	"fmt"
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"github.com/stretchr/testify/suite"

	"chorus/pkg/config"
	"chorus/pkg/ucxl"
	slurpContext "chorus/pkg/slurp/context"
)

// RoleCryptoTestSuite provides comprehensive testing for role-based encryption
type RoleCryptoTestSuite struct {
	suite.Suite
	config      *config.Config
	ageCrypto   *AgeCrypto
	auditLogger *MockAuditLogger
	roleCrypto  *RoleCrypto
	keyManager  *KeyManager
	keyStore    *MockKeyStore
	accessControl *AccessControlMatrix
}

// MockAuditLogger implements AuditLogger for testing
type MockAuditLogger struct {
	accessLogs    []*AccessLogEntry
	keyRotations  []*KeyRotationEvent
	securityEvents []*SecurityEvent
}

func (m *MockAuditLogger) LogAccess(entry *AccessLogEntry) error {
	m.accessLogs = append(m.accessLogs, entry)
	return nil
}

func (m *MockAuditLogger) LogKeyRotation(event *KeyRotationEvent) error {
	m.keyRotations = append(m.keyRotations, event)
	return nil
}

func (m *MockAuditLogger) LogSecurityEvent(event *SecurityEvent) error {
	m.securityEvents = append(m.securityEvents, event)
	return nil
}

func (m *MockAuditLogger) GetAuditTrail(criteria *AuditCriteria) ([]*AuditEvent, error) {
	events := []*AuditEvent{}
	for _, access := range m.accessLogs {
		events = append(events, &AuditEvent{
			EventID:   fmt.Sprintf("access_%s", access.UserID),
			EventType: "access",
			Timestamp: access.AccessTime,
			UserID:    access.UserID,
			Data: map[string]interface{}{
				"access_type": access.AccessType,
				"success":     access.Success,
			},
		})
	}
	return events, nil
}

// MockKeyStore implements KeyStore for testing
type MockKeyStore struct {
	keys map[string]*SecureKeyData
}

func NewMockKeyStore() *MockKeyStore {
	return &MockKeyStore{
		keys: make(map[string]*SecureKeyData),
	}
}

func (m *MockKeyStore) StoreKey(keyID string, keyData *SecureKeyData) error {
	m.keys[keyID] = keyData
	return nil
}

func (m *MockKeyStore) RetrieveKey(keyID string) (*SecureKeyData, error) {
	if key, exists := m.keys[keyID]; exists {
		return key, nil
	}
	return nil, fmt.Errorf("key not found: %s", keyID)
}

func (m *MockKeyStore) DeleteKey(keyID string) error {
	delete(m.keys, keyID)
	return nil
}

func (m *MockKeyStore) ListKeys(filter *KeyFilter) ([]*KeyMetadata, error) {
	metadata := []*KeyMetadata{}
	for keyID, keyData := range m.keys {
		if filter != nil && filter.RoleID != "" {
			if roleID, ok := keyData.Metadata["role_id"].(string); !ok || roleID != filter.RoleID {
				continue
			}
		}
		
		meta := &KeyMetadata{
			KeyID:         keyID,
			KeyType:       keyData.KeyType,
			CreatedAt:     keyData.CreatedAt,
			Status:        keyData.Status,
			SecurityLevel: AccessMedium, // Default for tests
		}
		
		if roleID, ok := keyData.Metadata["role_id"].(string); ok {
			meta.RoleID = roleID
		}
		
		metadata = append(metadata, meta)
	}
	return metadata, nil
}

func (m *MockKeyStore) BackupKeys(criteria *BackupCriteria) (*KeyBackup, error) {
	return &KeyBackup{
		BackupID:    fmt.Sprintf("backup_%d", time.Now().Unix()),
		CreatedAt:   time.Now(),
		KeyCount:    len(m.keys),
		Checksum:    "mock_checksum",
	}, nil
}

func (m *MockKeyStore) RestoreKeys(backup *KeyBackup) error {
	return nil
}

// MockPolicyEngine implements PolicyEngine for testing
type MockPolicyEngine struct {
	policies map[string]*AccessPolicy
}

func NewMockPolicyEngine() *MockPolicyEngine {
	return &MockPolicyEngine{
		policies: make(map[string]*AccessPolicy),
	}
}

func (m *MockPolicyEngine) EvaluatePolicy(ctx context.Context, request *AccessRequest) (*PolicyDecision, error) {
	// Simple mock evaluation - permit by default for testing
	decision := &PolicyDecision{
		RequestID:       request.RequestID,
		Decision:        DecisionPermit,
		Reason:          "Mock policy evaluation - permit",
		MatchedPolicies: []string{"mock_policy"},
		AppliedRules:    []string{"mock_rule"},
		ConfidenceScore: 0.95,
		RiskScore:       0.2,
		EvaluationTime:  10 * time.Millisecond,
		EvaluatedAt:     time.Now(),
	}

	// Deny access for test cases that need denial
	if strings.Contains(request.UserID, "unauthorized") {
		decision.Decision = DecisionDeny
		decision.Reason = "Unauthorized user"
		decision.RiskScore = 0.9
	}

	return decision, nil
}

func (m *MockPolicyEngine) CompilePolicy(policy *AccessPolicy) (*CompiledPolicy, error) {
	return &CompiledPolicy{
		PolicyID:        policy.PolicyID,
		CompiledAt:      time.Now(),
		CompilerVersion: "mock_v1.0",
	}, nil
}

func (m *MockPolicyEngine) ValidatePolicy(policy *AccessPolicy) (*PolicyValidationResult, error) {
	return &PolicyValidationResult{
		Valid:          true,
		Errors:         []string{},
		Warnings:       []string{},
		ValidatedAt:    time.Now(),
		ValidationTime: 5 * time.Millisecond,
	}, nil
}

func (m *MockPolicyEngine) LoadPolicies(policies []*AccessPolicy) error {
	for _, policy := range policies {
		m.policies[policy.PolicyID] = policy
	}
	return nil
}

func (m *MockPolicyEngine) ReloadPolicies() error {
	return nil
}

// MockAttributeProvider implements AttributeProvider for testing
type MockAttributeProvider struct{}

func (m *MockAttributeProvider) GetUserAttributes(userID string) (*UserAttributes, error) {
	return &UserAttributes{
		UserID:         userID,
		Department:     "Engineering",
		Title:          "Software Engineer",
		ClearanceLevel: "medium",
		EmploymentType: "full_time",
		StartDate:      time.Now().AddDate(-1, 0, 0),
		Location:       "headquarters",
	}, nil
}

func (m *MockAttributeProvider) GetResourceAttributes(resource string) (*ResourceAttributes, error) {
	return &ResourceAttributes{
		ResourceID:     resource,
		Classification: "internal",
		Sensitivity:    "medium",
		DataType:       "context",
		CreatedAt:      time.Now().AddDate(0, -1, 0),
		UpdatedAt:      time.Now(),
	}, nil
}

func (m *MockAttributeProvider) GetEnvironmentAttributes() (*EnvironmentAttributes, error) {
	return &EnvironmentAttributes{
		CurrentTime:     time.Now(),
		BusinessHours:   true,
		NetworkZone:     "internal",
		DeviceType:      "workstation",
		DeviceTrust:     "trusted",
		ConnectionType:  "wired",
		ThreatLevel:     "low",
		ComplianceMode:  "standard",
		MaintenanceMode: false,
	}, nil
}

func (m *MockAttributeProvider) GetContextAttributes(ctx context.Context) (*ContextAttributes, error) {
	return &ContextAttributes{
		RequestType:        "api",
		ApplicationContext: "slurp_system",
		BusinessContext:    "development",
		TechnicalContext:   "microservice",
		ComplianceContext:  "internal",
		RiskContext:        "low",
	}, nil
}

// SetupSuite initializes the test suite
func (suite *RoleCryptoTestSuite) SetupSuite() {
	// Create test configuration
	suite.config = &config.Config{
		Agent: config.Agent{
			ID:   "test_agent",
			Role: "backend_developer",
		},
	}

	// Initialize components
	suite.auditLogger = &MockAuditLogger{
		accessLogs:     []*AccessLogEntry{},
		keyRotations:   []*KeyRotationEvent{},
		securityEvents: []*SecurityEvent{},
	}

	suite.ageCrypto = NewAgeCrypto(suite.config)

	suite.keyStore = NewMockKeyStore()
	
	var err error
	suite.keyManager, err = NewKeyManager(suite.config, suite.keyStore, suite.auditLogger)
	suite.Require().NoError(err)

	adminKeyManager := NewAdminKeyManager(suite.config, "test_node")
	
	suite.roleCrypto, err = NewRoleCrypto(suite.config, suite.ageCrypto, adminKeyManager, suite.auditLogger)
	suite.Require().NoError(err)

	// Initialize access control
	policyEngine := NewMockPolicyEngine()
	attributeProvider := &MockAttributeProvider{}
	
	suite.accessControl, err = NewAccessControlMatrix(suite.config, policyEngine, attributeProvider, suite.auditLogger)
	suite.Require().NoError(err)
}

// TestBasicEncryptionDecryption tests basic encryption and decryption functionality
func (suite *RoleCryptoTestSuite) TestBasicEncryptionDecryption() {
	// Create test context
	address, err := ucxl.Parse("context://test/basic/encryption")
	suite.Require().NoError(err)

	testContext := &slurpContext.ContextNode{
		Path:        "/test/basic/encryption",
		UCXLAddress: address,
		Summary:     "Test context for basic encryption",
		Purpose:     "Testing encryption functionality",
		Technologies: []string{"go", "crypto"},
		Tags:        []string{"test", "encryption"},
		Insights:    []string{"This is a test insight"},
		GeneratedAt: time.Now(),
		RAGConfidence: 0.95,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	// Test encryption
	targetRoles := []string{"backend_developer", "senior_architect"}
	compartmentTags := []string{"development", "testing"}

	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(testContext, targetRoles, compartmentTags)
	suite.Require().NoError(err)
	suite.NotNil(encryptedData)
	suite.Equal(address, encryptedData.UCXLAddress)
	suite.NotEmpty(encryptedData.EncryptedLayers)
	suite.NotNil(encryptedData.AccessControlMeta)

	// Test decryption
	decryptedContext, err := suite.roleCrypto.DecryptContextForRole(encryptedData, "backend_developer")
	suite.Require().NoError(err)
	suite.NotNil(decryptedContext)
	suite.Equal(testContext.Summary, decryptedContext.Summary)
	suite.Equal(testContext.Purpose, decryptedContext.Purpose)

	// Verify audit logging
	suite.True(len(suite.auditLogger.accessLogs) > 0)
}

// TestRoleBasedAccess tests role-based access control
func (suite *RoleCryptoTestSuite) TestRoleBasedAccess() {
	address, err := ucxl.Parse("context://test/rbac/access")
	suite.Require().NoError(err)

	testContext := &slurpContext.ContextNode{
		Path:        "/test/rbac/access",
		UCXLAddress: address,
		Summary:     "Test context for RBAC",
		Purpose:     "Testing role-based access control",
		Technologies: []string{"security", "rbac"},
		Tags:        []string{"test", "security"},
		EncryptedFor: []string{"senior_architect"},
		AccessLevel:  slurpContext.AccessHigh,
		GeneratedAt: time.Now(),
		RAGConfidence: 0.9,
	}

	// Encrypt for high-privilege role only
	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(testContext, []string{"senior_architect"}, []string{"security"})
	suite.Require().NoError(err)

	// Test access with authorized role
	decryptedContext, err := suite.roleCrypto.DecryptContextForRole(encryptedData, "senior_architect")
	suite.Require().NoError(err)
	suite.NotNil(decryptedContext)

	// Test access with unauthorized role (should fail)
	_, err = suite.roleCrypto.DecryptContextForRole(encryptedData, "intern")
	suite.Error(err)
	suite.Contains(err.Error(), "access denied")
}

// TestMultiLayerEncryption tests multi-layer encryption with different access levels
func (suite *RoleCryptoTestSuite) TestMultiLayerEncryption() {
	address, err := ucxl.Parse("context://test/multilayer/encryption")
	suite.Require().NoError(err)

	testContext := &slurpContext.ContextNode{
		Path:        "/test/multilayer/encryption",
		UCXLAddress: address,
		Summary:     "Test context for multi-layer encryption",
		Purpose:     "Testing layered encryption",
		Technologies: []string{"encryption", "security"},
		Tags:        []string{"test", "multilayer"},
		Insights:    []string{"Multi-layer security insight", "Advanced encryption insight"},
		EncryptedFor: []string{"backend_developer", "senior_architect", "devops_engineer"},
		AccessLevel:  slurpContext.AccessMedium,
		GeneratedAt: time.Now(),
		RAGConfidence: 0.85,
	}

	// Encrypt for multiple roles with different access levels
	targetRoles := []string{"backend_developer", "senior_architect", "devops_engineer"}
	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(testContext, targetRoles, []string{"development"})
	suite.Require().NoError(err)

	// Verify multiple encryption layers
	suite.True(len(encryptedData.EncryptedLayers) > 0)
	suite.NotEmpty(encryptedData.KeyFingerprints)

	// Test decryption with different roles
	for _, role := range targetRoles {
		decryptedContext, err := suite.roleCrypto.DecryptContextForRole(encryptedData, role)
		suite.Require().NoError(err, "Failed to decrypt for role: %s", role)
		suite.NotNil(decryptedContext)
		suite.Equal(testContext.Summary, decryptedContext.Summary)
	}
}

// TestRoleBasedFiltering tests role-specific context filtering
func (suite *RoleCryptoTestSuite) TestRoleBasedFiltering() {
	address, err := ucxl.Parse("context://test/filtering/context")
	suite.Require().NoError(err)

	testContext := &slurpContext.ContextNode{
		Path:        "/test/filtering/context",
		UCXLAddress: address,
		Summary:     "Test context for filtering",
		Purpose:     "Testing role-based filtering",
		Technologies: []string{"frontend", "backend", "database"},
		Tags:        []string{"test", "filtering"},
		Insights:    []string{"Frontend insight", "Backend insight", "Database insight"},
		EncryptedFor: []string{"frontend_developer", "backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
		GeneratedAt: time.Now(),
		RAGConfidence: 0.8,
	}

	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(testContext, []string{"frontend_developer", "backend_developer"}, []string{"development"})
	suite.Require().NoError(err)

	// Test frontend developer access (should get frontend-specific insights)
	frontendContext, err := suite.roleCrypto.DecryptContextForRole(encryptedData, "frontend_developer")
	suite.Require().NoError(err)
	suite.Contains(strings.Join(frontendContext.Insights, " "), "Frontend")

	// Test backend developer access (should get backend-specific insights)
	backendContext, err := suite.roleCrypto.DecryptContextForRole(encryptedData, "backend_developer")
	suite.Require().NoError(err)
	suite.Contains(strings.Join(backendContext.Insights, " "), "Backend")
}

// TestKeyManagement tests key generation and management
func (suite *RoleCryptoTestSuite) TestKeyManagement() {
	// Test key generation
	keyPair, err := suite.keyManager.GenerateRoleKey("test_role", "age-x25519")
	suite.Require().NoError(err)
	suite.NotNil(keyPair)
	suite.NotEmpty(keyPair.PublicKey)
	suite.NotEmpty(keyPair.PrivateKey)
	suite.True(strings.HasPrefix(keyPair.PublicKey, "age1"))

	// Test key retrieval
	metadata, err := suite.keyManager.GetKeyMetadata(&KeyFilter{RoleID: "test_role"})
	suite.Require().NoError(err)
	suite.True(len(metadata) > 0)

	// Test key integrity verification
	keyID := fmt.Sprintf("test_role_age-x25519_v%d", keyPair.Version)
	verificationResult, err := suite.keyManager.VerifyKeyIntegrity(keyID)
	suite.Require().NoError(err)
	suite.NotNil(verificationResult)
	suite.True(verificationResult.IntegrityOK)
}

// TestKeyRotation tests automatic key rotation
func (suite *RoleCryptoTestSuite) TestKeyRotation() {
	// Create initial key
	originalKeyPair, err := suite.keyManager.GenerateRoleKey("rotation_test_role", "age-x25519")
	suite.Require().NoError(err)

	// Perform key rotation
	rotationResult, err := suite.keyManager.RotateKey("rotation_test_role", "test_rotation")
	suite.Require().NoError(err)
	suite.NotNil(rotationResult)
	suite.Contains(rotationResult.RotatedRoles, "rotation_test_role")
	suite.NotEmpty(rotationResult.NewKeys)
	suite.NotEmpty(rotationResult.RevokedKeys)

	// Verify new key is different from original
	newKey := rotationResult.NewKeys["rotation_test_role"]
	suite.NotEqual(originalKeyPair.PublicKey, string(newKey.KeyData))

	// Verify audit logging
	suite.True(len(suite.auditLogger.keyRotations) > 0)
	rotation := suite.auditLogger.keyRotations[len(suite.auditLogger.keyRotations)-1]
	suite.Equal("test_rotation", rotation.Reason)
	suite.True(rotation.Success)
}

// TestAccessControlMatrix tests the access control matrix functionality
func (suite *RoleCryptoTestSuite) TestAccessControlMatrix() {
	ctx := context.Background()
	
	// Create access request
	request := &AccessRequest{
		RequestID:    "test_request_001",
		Timestamp:    time.Now(),
		UserID:       "test_user",
		Roles:        []string{"backend_developer"},
		Resource:     "context://test/access/resource",
		ResourceType: "context",
		Action:       "read",
		ActionType:   "data_access",
		SessionID:    "test_session_001",
		IPAddress:    "192.168.1.100",
		UserAgent:    "TestAgent/1.0",
		Priority:     1,
		Justification: "Testing access control",
		Metadata:     make(map[string]interface{}),
	}

	// Test access evaluation
	decision, err := suite.accessControl.CheckAccess(ctx, request)
	suite.Require().NoError(err)
	suite.NotNil(decision)
	suite.Equal(DecisionPermit, decision.Decision)
	suite.True(decision.ConfidenceScore > 0)
	suite.True(decision.EvaluationTime > 0)

	// Test unauthorized access
	unauthorizedRequest := &AccessRequest{
		RequestID:    "test_request_002",
		Timestamp:    time.Now(),
		UserID:       "unauthorized_user",
		Roles:        []string{"intern"},
		Resource:     "context://test/sensitive/resource",
		ResourceType: "context",
		Action:       "write",
		ActionType:   "data_modification",
		SessionID:    "test_session_002",
		IPAddress:    "192.168.1.200",
		UserAgent:    "TestAgent/1.0",
		Priority:     1,
		Justification: "Testing unauthorized access",
		Metadata:     make(map[string]interface{}),
	}

	unauthorizedDecision, err := suite.accessControl.CheckAccess(ctx, unauthorizedRequest)
	suite.Require().NoError(err)
	suite.Equal(DecisionDeny, unauthorizedDecision.Decision)
}

// TestBypassTokens tests bypass token functionality
func (suite *RoleCryptoTestSuite) TestBypassTokens() {
	// Create bypass token
	token, err := suite.accessControl.CreateBypassToken(
		"admin_user",
		"Emergency maintenance",
		[]string{"context://emergency/*"},
		1*time.Hour,
		5,
	)
	suite.Require().NoError(err)
	suite.NotNil(token)
	suite.Equal(BypassTokenStatusActive, token.Status)
	suite.Equal(0, token.UsageCount)

	// Test access with bypass token
	ctx := context.Background()
	request := &AccessRequest{
		RequestID:    "bypass_test_001",
		Timestamp:    time.Now(),
		UserID:       "regular_user",
		Roles:        []string{"intern"},
		Resource:     "context://emergency/system",
		Action:       "read",
		Metadata:     map[string]interface{}{"bypass_token": token.TokenID},
	}

	decision, err := suite.accessControl.CheckAccess(ctx, request)
	suite.Require().NoError(err)
	suite.Equal(DecisionPermit, decision.Decision)
	suite.Contains(decision.Reason, "Bypass token")

	// Verify token usage was recorded
	suite.Equal(1, token.UsageCount)
}

// TestSecurityMetrics tests security metrics collection
func (suite *RoleCryptoTestSuite) TestSecurityMetrics() {
	// Get role crypto metrics
	metrics := suite.roleCrypto.GetSecurityMetrics()
	suite.NotNil(metrics)
	suite.Contains(metrics, "total_roles")
	suite.Contains(metrics, "security_score")

	// Get access control metrics
	acMetrics := suite.accessControl.GetAccessControlMetrics()
	suite.NotNil(acMetrics)
	suite.Contains(acMetrics, "total_evaluations")
	suite.Contains(acMetrics, "enforcement_mode")

	// Get key management security status
	keyStatus := suite.keyManager.GetSecurityStatus()
	suite.NotNil(keyStatus)
	suite.Contains([]string{"healthy", "warning", "degraded", "critical"}, keyStatus.OverallHealth)
	suite.True(keyStatus.SecurityScore >= 0 && keyStatus.SecurityScore <= 1)
}

// TestComplianceFeatures tests compliance and audit features
func (suite *RoleCryptoTestSuite) TestComplianceFeatures() {
	// Test audit trail retrieval
	criteria := &AuditCriteria{
		StartTime: &[]time.Time{time.Now().Add(-1 * time.Hour)}[0],
		EndTime:   &[]time.Time{time.Now()}[0],
		UserID:    "test_user",
		Limit:     100,
	}

	auditTrail, err := suite.auditLogger.GetAuditTrail(criteria)
	suite.Require().NoError(err)
	suite.NotNil(auditTrail)

	// Verify audit events have required fields
	if len(auditTrail) > 0 {
		event := auditTrail[0]
		suite.NotEmpty(event.EventID)
		suite.NotEmpty(event.EventType)
		suite.NotEmpty(event.UserID)
		suite.NotZero(event.Timestamp)
	}
}

// TestErrorHandling tests error handling and edge cases
func (suite *RoleCryptoTestSuite) TestErrorHandling() {
	// Test encryption with invalid context
	invalidContext := &slurpContext.ContextNode{
		Path:        "", // Invalid: empty path
		Summary:     "", // Invalid: empty summary
		GeneratedAt: time.Now(),
	}

	_, err := suite.roleCrypto.EncryptContextForRoles(invalidContext, []string{"backend_developer"}, []string{})
	suite.Error(err)
	suite.Contains(err.Error(), "invalid context")

	// Test decryption with invalid role
	address, _ := ucxl.Parse("context://test/valid/context")
	validContext := &slurpContext.ContextNode{
		Path:        "/test/valid/context",
		UCXLAddress: address,
		Summary:     "Valid test context",
		Purpose:     "Testing error handling",
		GeneratedAt: time.Now(),
		RAGConfidence: 0.8,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(validContext, []string{"backend_developer"}, []string{})
	suite.Require().NoError(err)

	_, err = suite.roleCrypto.DecryptContextForRole(encryptedData, "non_existent_role")
	suite.Error(err)
	suite.Contains(err.Error(), "access denied")

	// Test key generation with invalid parameters
	_, err = suite.keyManager.GenerateRoleKey("", "invalid_type")
	suite.Error(err)
}

// TestPerformance tests performance characteristics
func (suite *RoleCryptoTestSuite) TestPerformance() {
	// Create test context
	address, _ := ucxl.Parse("context://test/performance/benchmark")
	testContext := &slurpContext.ContextNode{
		Path:        "/test/performance/benchmark",
		UCXLAddress: address,
		Summary:     "Performance test context",
		Purpose:     "Testing encryption performance",
		Technologies: []string{"performance", "crypto"},
		Tags:        []string{"test", "benchmark"},
		Insights:    make([]string, 100), // Large insights array
		GeneratedAt: time.Now(),
		RAGConfidence: 0.9,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	// Fill insights with test data
	for i := 0; i < 100; i++ {
		testContext.Insights[i] = fmt.Sprintf("Performance test insight #%d", i+1)
	}

	// Benchmark encryption
	start := time.Now()
	encryptedData, err := suite.roleCrypto.EncryptContextForRoles(testContext, []string{"backend_developer"}, []string{"performance"})
	encryptionTime := time.Since(start)
	
	suite.Require().NoError(err)
	suite.True(encryptionTime < 100*time.Millisecond, "Encryption took too long: %v", encryptionTime)

	// Benchmark decryption
	start = time.Now()
	_, err = suite.roleCrypto.DecryptContextForRole(encryptedData, "backend_developer")
	decryptionTime := time.Since(start)
	
	suite.Require().NoError(err)
	suite.True(decryptionTime < 50*time.Millisecond, "Decryption took too long: %v", decryptionTime)

	// Test concurrent operations
	concurrentOps := 10
	results := make(chan error, concurrentOps)

	for i := 0; i < concurrentOps; i++ {
		go func(index int) {
			address, _ := ucxl.Parse(fmt.Sprintf("context://test/concurrent/%d", index))
			ctx := &slurpContext.ContextNode{
				Path:        fmt.Sprintf("/test/concurrent/%d", index),
				UCXLAddress: address,
				Summary:     fmt.Sprintf("Concurrent test context %d", index),
				Purpose:     "Testing concurrent operations",
				GeneratedAt: time.Now(),
				RAGConfidence: 0.8,
				EncryptedFor: []string{"backend_developer"},
				AccessLevel:  slurpContext.AccessMedium,
			}

			encrypted, err := suite.roleCrypto.EncryptContextForRoles(ctx, []string{"backend_developer"}, []string{"concurrent"})
			if err != nil {
				results <- err
				return
			}

			_, err = suite.roleCrypto.DecryptContextForRole(encrypted, "backend_developer")
			results <- err
		}(i)
	}

	// Wait for all operations to complete
	for i := 0; i < concurrentOps; i++ {
		err := <-results
		suite.NoError(err, "Concurrent operation %d failed", i)
	}
}

// TestSecurityVulnerabilities tests for common security vulnerabilities
func (suite *RoleCryptoTestSuite) TestSecurityVulnerabilities() {
	// Test for timing attacks (encryption should take consistent time)
	address, _ := ucxl.Parse("context://test/security/timing")
	baseContext := &slurpContext.ContextNode{
		Path:        "/test/security/timing",
		UCXLAddress: address,
		Summary:     "Timing attack test",
		Purpose:     "Testing for timing vulnerabilities",
		GeneratedAt: time.Now(),
		RAGConfidence: 0.8,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	// Measure encryption times for different content sizes
	var times []time.Duration
	for i := 0; i < 10; i++ {
		testContext := *baseContext
		testContext.Insights = make([]string, i*10) // Varying content size
		for j := range testContext.Insights {
			testContext.Insights[j] = fmt.Sprintf("Insight %d", j)
		}

		start := time.Now()
		_, err := suite.roleCrypto.EncryptContextForRoles(&testContext, []string{"backend_developer"}, []string{"timing"})
		duration := time.Since(start)
		
		suite.Require().NoError(err)
		times = append(times, duration)
	}

	// Check that times don't vary too much (basic timing attack protection)
	maxTime := times[0]
	minTime := times[0]
	for _, t := range times {
		if t > maxTime {
			maxTime = t
		}
		if t < minTime {
			minTime = t
		}
	}

	// Times should not vary by more than 100% (basic check)
	variance := float64(maxTime-minTime) / float64(minTime)
	suite.True(variance < 2.0, "Encryption times vary too much: %v", variance)

	// Test for privilege escalation (lower privilege role shouldn't access higher privilege content)
	highPrivContext := &slurpContext.ContextNode{
		Path:        "/test/security/privilege",
		UCXLAddress: address,
		Summary:     "High privilege content",
		Purpose:     "Testing privilege escalation protection",
		GeneratedAt: time.Now(),
		RAGConfidence: 0.9,
		EncryptedFor: []string{"senior_architect"},
		AccessLevel:  slurpContext.AccessCritical,
	}

	encryptedHighPriv, err := suite.roleCrypto.EncryptContextForRoles(highPrivContext, []string{"senior_architect"}, []string{"security"})
	suite.Require().NoError(err)

	// Attempt access with lower privilege role
	_, err = suite.roleCrypto.DecryptContextForRole(encryptedHighPriv, "intern")
	suite.Error(err, "Lower privilege role should not access higher privilege content")

	// Test for information leakage in error messages
	suite.NotContains(err.Error(), "senior_architect", "Error message should not leak role information")
	suite.NotContains(err.Error(), highPrivContext.Summary, "Error message should not leak content information")
}

// BenchmarkEncryption benchmarks encryption operations
func BenchmarkEncryption(b *testing.B) {
	// Setup
	config := &config.Config{
		Agent: config.Agent{ID: "bench_agent", Role: "backend_developer"},
	}
	auditLogger := &MockAuditLogger{}
	ageCrypto := NewAgeCrypto(config)
	adminKeyManager := NewAdminKeyManager(config, "bench_node")
	
	roleCrypto, err := NewRoleCrypto(config, ageCrypto, adminKeyManager, auditLogger)
	require.NoError(b, err)

	address, _ := ucxl.Parse("context://benchmark/encryption")
	testContext := &slurpContext.ContextNode{
		Path:        "/benchmark/encryption",
		UCXLAddress: address,
		Summary:     "Benchmark context for encryption testing",
		Purpose:     "Performance testing of encryption operations",
		Technologies: []string{"crypto", "benchmark"},
		Tags:        []string{"benchmark", "performance"},
		Insights:    []string{"Benchmark insight 1", "Benchmark insight 2"},
		GeneratedAt: time.Now(),
		RAGConfidence: 0.85,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	b.ResetTimer()
	b.RunParallel(func(pb *testing.PB) {
		for pb.Next() {
			_, err := roleCrypto.EncryptContextForRoles(testContext, []string{"backend_developer"}, []string{"benchmark"})
			if err != nil {
				b.Fatalf("Encryption failed: %v", err)
			}
		}
	})
}

// BenchmarkDecryption benchmarks decryption operations
func BenchmarkDecryption(b *testing.B) {
	// Setup
	config := &config.Config{
		Agent: config.Agent{ID: "bench_agent", Role: "backend_developer"},
	}
	auditLogger := &MockAuditLogger{}
	ageCrypto := NewAgeCrypto(config)
	adminKeyManager := NewAdminKeyManager(config, "bench_node")
	
	roleCrypto, err := NewRoleCrypto(config, ageCrypto, adminKeyManager, auditLogger)
	require.NoError(b, err)

	address, _ := ucxl.Parse("context://benchmark/decryption")
	testContext := &slurpContext.ContextNode{
		Path:        "/benchmark/decryption",
		UCXLAddress: address,
		Summary:     "Benchmark context for decryption testing",
		Purpose:     "Performance testing of decryption operations",
		Technologies: []string{"crypto", "benchmark"},
		Tags:        []string{"benchmark", "performance"},
		Insights:    []string{"Benchmark insight 1", "Benchmark insight 2"},
		GeneratedAt: time.Now(),
		RAGConfidence: 0.85,
		EncryptedFor: []string{"backend_developer"},
		AccessLevel:  slurpContext.AccessMedium,
	}

	// Pre-encrypt context for benchmarking decryption
	encryptedData, err := roleCrypto.EncryptContextForRoles(testContext, []string{"backend_developer"}, []string{"benchmark"})
	require.NoError(b, err)

	b.ResetTimer()
	b.RunParallel(func(pb *testing.PB) {
		for pb.Next() {
			_, err := roleCrypto.DecryptContextForRole(encryptedData, "backend_developer")
			if err != nil {
				b.Fatalf("Decryption failed: %v", err)
			}
		}
	})
}

// BenchmarkAccessControl benchmarks access control evaluation
func BenchmarkAccessControl(b *testing.B) {
	// Setup
	config := &config.Config{
		Agent: config.Agent{ID: "bench_agent", Role: "backend_developer"},
	}
	auditLogger := &MockAuditLogger{}
	policyEngine := NewMockPolicyEngine()
	attributeProvider := &MockAttributeProvider{}
	
	accessControl, err := NewAccessControlMatrix(config, policyEngine, attributeProvider, auditLogger)
	require.NoError(b, err)

	ctx := context.Background()
	request := &AccessRequest{
		RequestID:    "benchmark_request",
		Timestamp:    time.Now(),
		UserID:       "bench_user",
		Roles:        []string{"backend_developer"},
		Resource:     "context://benchmark/access",
		ResourceType: "context",
		Action:       "read",
		ActionType:   "data_access",
		SessionID:    "bench_session",
		IPAddress:    "192.168.1.100",
		UserAgent:    "BenchmarkAgent/1.0",
		Priority:     1,
		Metadata:     make(map[string]interface{}),
	}

	b.ResetTimer()
	b.RunParallel(func(pb *testing.PB) {
		for pb.Next() {
			_, err := accessControl.CheckAccess(ctx, request)
			if err != nil {
				b.Fatalf("Access control evaluation failed: %v", err)
			}
		}
	})
}

// TestMain sets up and tears down the test suite
func TestMain(m *testing.M) {
	// Setup any global test resources here
	
	// Run tests
	code := m.Run()
	
	// Cleanup any global test resources here
	
	// Exit with the same code as the test run
	fmt.Printf("Test suite completed with exit code: %d\n", code)
}

// Run the test suite
func TestRoleCryptoTestSuite(t *testing.T) {
	suite.Run(t, new(RoleCryptoTestSuite))
}