☕ TuskLang Java Security Guide

"We don't bow to any king" - Java Edition

Master TuskLang security in Java with comprehensive coverage of security features, encryption, authentication, Java integration patterns, and best practices for secure configuration management.

🎯 Security Basics

Security Configuration

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.SecurityConfig;
import org.tusklang.java.security.SecurityManager;
import java.util.Map;
public class SecurityBasics {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure security settings
        SecurityConfig securityConfig = new SecurityConfig();
        securityConfig.setEnableEncryption(true);
        securityConfig.setEnableValidation(true);
        securityConfig.setEnableAuditLogging(true);
        securityConfig.setMaxFileSize(1024 * 1024); // 1MB
        securityConfig.setAllowedFileExtensions(List.of("tsk"));
        
        SecurityManager securityManager = new SecurityManager(securityConfig);
        parser.setSecurityManager(securityManager);
        
        // Parse with security enabled
        Map<String, Object> config = parser.parseFile("config.tsk");
        System.out.println("Configuration loaded with security enabled");
    }
}

Secure Configuration Example

Secure configuration with encryption
app_name: "Secure TuskLang App"
version: "1.0.0"
Encrypted sensitive data
[database]
host: "localhost"
port: 5432
name: "secure_app"
user: "app_user"
password: @encrypt("sensitive_password", "AES-256-GCM")
[security]
ssl_enabled: true
cert_file: @env.secure("SSL_CERT_FILE")
key_file: @env.secure("SSL_KEY_FILE")
jwt_secret: @env.secure("JWT_SECRET")
[api]
api_key: @encrypt("your_api_key_here", "AES-256-GCM")
webhook_secret: @env.secure("WEBHOOK_SECRET")

🔐 Encryption and Decryption

Built-in Encryption

Using built-in encryption
sensitive_data: @encrypt("secret_value", "AES-256-GCM")
api_key: @encrypt("your_api_key", "AES-256-GCM")
database_password: @encrypt("db_password", "AES-256-GCM")
Encrypted configuration sections
[secrets]
user_password: @encrypt("user123", "AES-256-GCM")
admin_token: @encrypt("admin_token_here", "AES-256-GCM")
session_key: @encrypt("session_secret", "AES-256-GCM")

Java Encryption Integration

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.EncryptionManager;
import org.tusklang.java.security.EncryptionConfig;
import java.util.Map;
public class EncryptionExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure encryption
        EncryptionConfig encryptionConfig = new EncryptionConfig();
        encryptionConfig.setDefaultAlgorithm("AES-256-GCM");
        encryptionConfig.setKeyDerivationFunction("PBKDF2");
        encryptionConfig.setKeyIterations(100000);
        encryptionConfig.setSaltLength(32);
        
        EncryptionManager encryptionManager = new EncryptionManager(encryptionConfig);
        parser.setEncryptionManager(encryptionManager);
        
        // Set encryption key
        encryptionManager.setMasterKey("your-secure-master-key");
        
        // Parse encrypted configuration
        Map<String, Object> config = parser.parseFile("secure-config.tsk");
        
        // Access decrypted values
        String apiKey = (String) config.get("api_key");
        String dbPassword = (String) config.get("database");
        
        System.out.println("API Key: " + apiKey);
        System.out.println("Database Password: " + dbPassword);
    }
}

Custom Encryption

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.CustomEncryption;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
import java.util.Map;
public class CustomEncryptionExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Create custom encryption
        CustomEncryption customEncryption = new CustomEncryption() {
            @Override
            public String encrypt(String data, String algorithm) throws Exception {
                SecretKeySpec key = new SecretKeySpec("your-32-byte-secret-key-here".getBytes(), "AES");
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.ENCRYPT_MODE, key);
                byte[] encrypted = cipher.doFinal(data.getBytes());
                return Base64.getEncoder().encodeToString(encrypted);
            }
            
            @Override
            public String decrypt(String encryptedData, String algorithm) throws Exception {
                SecretKeySpec key = new SecretKeySpec("your-32-byte-secret-key-here".getBytes(), "AES");
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.DECRYPT_MODE, key);
                byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(encryptedData));
                return new String(decrypted);
            }
        };
        
        parser.setCustomEncryption(customEncryption);
        
        // Parse with custom encryption
        Map<String, Object> config = parser.parseFile("custom-encrypted-config.tsk");
        System.out.println("Configuration loaded with custom encryption");
    }
}

🔒 Environment Variable Security

Secure Environment Variables

Secure environment variable access
[database]
host: @env("DB_HOST", "localhost")
port: @env("DB_PORT", 5432)
name: @env("DB_NAME", "app")
user: @env("DB_USER", "postgres")
password: @env.secure("DB_PASSWORD")  # Secure environment variable
[security]
jwt_secret: @env.secure("JWT_SECRET")
api_key: @env.secure("API_KEY")
ssl_cert: @env.secure("SSL_CERT")
ssl_key: @env.secure("SSL_KEY")
[external]
webhook_url: @env("WEBHOOK_URL")
webhook_secret: @env.secure("WEBHOOK_SECRET")

Java Environment Security

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.EnvironmentSecurity;
import org.tusklang.java.security.SecureEnvironment;
import java.util.Map;
public class EnvironmentSecurityExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure environment security
        EnvironmentSecurity envSecurity = new EnvironmentSecurity();
        envSecurity.setSecurePrefix("SECURE_");
        envSecurity.setMaskSensitiveValues(true);
        envSecurity.setLogAccessAttempts(true);
        
        SecureEnvironment secureEnv = new SecureEnvironment(envSecurity);
        parser.setSecureEnvironment(secureEnv);
        
        // Set secure environment variables
        System.setProperty("SECURE_DB_PASSWORD", "encrypted_password_here");
        System.setProperty("SECURE_JWT_SECRET", "encrypted_jwt_secret");
        System.setProperty("SECURE_API_KEY", "encrypted_api_key");
        
        // Parse with secure environment
        Map<String, Object> config = parser.parseFile("env-secure-config.tsk");
        
        // Access secure values
        String dbPassword = (String) config.get("database");
        String jwtSecret = (String) config.get("security");
        String apiKey = (String) config.get("security");
        
        System.out.println("Database password loaded securely");
        System.out.println("JWT secret loaded securely");
        System.out.println("API key loaded securely");
    }
}

🔍 Input Validation and Sanitization

Security Validation

Security validation examples
app_name: @validate.security("app_name", {
    "max_length": 100,
    "allowed_chars": "a-zA-Z0-9_-",
    "forbidden_patterns": ["script", "javascript", "eval"]
})
user_input: @validate.security("user_input", {
    "max_length": 1000,
    "strip_html": true,
    "escape_special_chars": true
})
file_path: @validate.security("file_path", {
    "allowed_paths": ["/var/app/config/", "/etc/app/"],
    "forbidden_patterns": ["..", "~", "/root"]
})

Java Security Validation

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.SecurityValidator;
import org.tusklang.java.security.ValidationRule;
import java.util.Map;
public class SecurityValidationExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure security validation
        SecurityValidator securityValidator = new SecurityValidator();
        
        // Add security validation rules
        securityValidator.addRule(new ValidationRule("file_path", value -> {
            String path = value.toString();
            if (path.contains("..") || path.contains("~") || path.startsWith("/root")) {
                return "Path contains forbidden patterns";
            }
            if (!path.startsWith("/var/app/config/") && !path.startsWith("/etc/app/")) {
                return "Path not in allowed directories";
            }
            return null;
        }));
        
        securityValidator.addRule(new ValidationRule("user_input", value -> {
            String input = value.toString();
            if (input.contains("<script>") || input.contains("javascript:") || input.contains("eval(")) {
                return "Input contains forbidden patterns";
            }
            if (input.length() > 1000) {
                return "Input too long";
            }
            return null;
        }));
        
        parser.setSecurityValidator(securityValidator);
        
        // Parse with security validation
        Map<String, Object> config = parser.parseFile("validated-config.tsk");
        System.out.println("Configuration validated for security");
    }
}

🛡️ Access Control

Role-Based Access Control

Role-based configuration access
@role("admin")
admin_config: @encrypt("admin_secret", "AES-256-GCM")
@role("user")
user_config: "user_data"
@role("system")
system_config: @env.secure("SYSTEM_SECRET")
Conditional access based on roles
[features]
admin_features: @if.role("admin", "enabled", "disabled")
user_features: @if.role("user", "enabled", "disabled")
system_features: @if.role("system", "enabled", "disabled")

Java Access Control

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.AccessControl;
import org.tusklang.java.security.RoleManager;
import java.util.Map;
import java.util.Set;
public class AccessControlExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure access control
        AccessControl accessControl = new AccessControl();
        RoleManager roleManager = new RoleManager();
        
        // Set user roles
        Set<String> userRoles = Set.of("user", "admin");
        roleManager.setUserRoles(userRoles);
        
        // Configure role permissions
        accessControl.addRolePermission("admin", "admin_config", "read");
        accessControl.addRolePermission("admin", "admin_config", "write");
        accessControl.addRolePermission("user", "user_config", "read");
        accessControl.addRolePermission("system", "system_config", "read");
        
        parser.setAccessControl(accessControl);
        parser.setRoleManager(roleManager);
        
        // Parse with access control
        Map<String, Object> config = parser.parseFile("role-based-config.tsk");
        
        // Access based on roles
        if (roleManager.hasRole("admin")) {
            String adminConfig = (String) config.get("admin_config");
            System.out.println("Admin config: " + adminConfig);
        }
        
        if (roleManager.hasRole("user")) {
            String userConfig = (String) config.get("user_config");
            System.out.println("User config: " + userConfig);
        }
    }
}

📝 Audit Logging

Security Audit

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.AuditLogger;
import org.tusklang.java.security.AuditEvent;
import java.util.Map;
import java.util.List;
public class AuditLoggingExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure audit logging
        AuditLogger auditLogger = new AuditLogger();
        auditLogger.setLogLevel("INFO");
        auditLogger.setLogFile("/var/log/tusklang-security.log");
        auditLogger.setEnableConsoleLogging(true);
        
        parser.setAuditLogger(auditLogger);
        
        // Parse with audit logging
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Get audit events
        List<AuditEvent> events = auditLogger.getAuditEvents();
        
        System.out.println("=== Security Audit Events ===");
        for (AuditEvent event : events) {
            System.out.println("Timestamp: " + event.getTimestamp());
            System.out.println("Event: " + event.getEventType());
            System.out.println("User: " + event.getUser());
            System.out.println("Resource: " + event.getResource());
            System.out.println("Action: " + event.getAction());
            System.out.println("Result: " + event.getResult());
            System.out.println("---");
        }
        
        // Generate audit report
        Map<String, Object> auditReport = auditLogger.generateAuditReport();
        System.out.println("Total events: " + auditReport.get("totalEvents"));
        System.out.println("Security violations: " + auditReport.get("securityViolations"));
        System.out.println("Access attempts: " + auditReport.get("accessAttempts"));
    }
}

🔐 Authentication and Authorization

Secure Authentication

import org.tusklang.java.TuskLang;
import org.tusklang.java.security.AuthenticationManager;
import org.tusklang.java.security.AuthorizationManager;
import org.tusklang.java.security.User;
import java.util.Map;
public class AuthenticationExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure authentication
        AuthenticationManager authManager = new AuthenticationManager();
        AuthorizationManager authzManager = new AuthorizationManager();
        
        // Create user with roles
        User user = new User("john.doe", "password123");
        user.addRole("admin");
        user.addRole("user");
        
        // Authenticate user
        boolean authenticated = authManager.authenticate(user);
        
        if (authenticated) {
            // Set authenticated user
            authzManager.setCurrentUser(user);
            
            // Configure authorization
            authzManager.addPermission("admin", "config", "read");
            authzManager.addPermission("admin", "config", "write");
            authzManager.addPermission("user", "config", "read");
            
            parser.setAuthorizationManager(authzManager);
            
            // Parse with authentication
            Map<String, Object> config = parser.parseFile("auth-config.tsk");
            System.out.println("Configuration loaded with authentication");
            
        } else {
            System.err.println("Authentication failed");
        }
    }
}

🧪 Security Testing

Security Test Suite

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.BeforeEach;
import static org.junit.jupiter.api.Assertions.*;
import org.tusklang.java.TuskLang;
import org.tusklang.java.security.SecurityTester;
import org.tusklang.java.security.SecurityReport;
import java.util.Map;
class SecurityTest {
    
    private TuskLang parser;
    private SecurityTester securityTester;
    
    @BeforeEach
    void setUp() {
        parser = new TuskLang();
        securityTester = new SecurityTester(parser);
    }
    
    @Test
    void testEncryptionSecurity() {
        String encryptedContent = """
            sensitive_data: @encrypt("secret_value", "AES-256-GCM")
            api_key: @encrypt("api_key_here", "AES-256-GCM")
            """;
        
        SecurityReport report = securityTester.testEncryption(encryptedContent);
        
        assertTrue(report.isEncryptionSecure());
        assertEquals(2, report.getEncryptedFields());
        assertTrue(report.getEncryptionAlgorithm().equals("AES-256-GCM"));
    }
    
    @Test
    void testInputValidation() {
        String maliciousContent = """
            user_input: "<script>alert('xss')</script>"
            file_path: "../../../etc/passwd"
            """;
        
        SecurityReport report = securityTester.testInputValidation(maliciousContent);
        
        assertFalse(report.isInputSecure());
        assertTrue(report.getSecurityViolations().size() > 0);
        assertTrue(report.getSecurityViolations().contains("XSS"));
        assertTrue(report.getSecurityViolations().contains("Path traversal"));
    }
    
    @Test
    void testAccessControl() {
        String roleBasedContent = """
            @role("admin")
            admin_secret: "admin_data"
            
            @role("user")
            user_data: "user_info"
            """;
        
        SecurityReport report = securityTester.testAccessControl(roleBasedContent);
        
        assertTrue(report.isAccessControlEnabled());
        assertEquals(2, report.getProtectedResources());
        assertTrue(report.getRoles().contains("admin"));
        assertTrue(report.getRoles().contains("user"));
    }
    
    @Test
    void testEnvironmentSecurity() {
        String envContent = """
            password: @env.secure("DB_PASSWORD")
            api_key: @env.secure("API_KEY")
            """;
        
        SecurityReport report = securityTester.testEnvironmentSecurity(envContent);
        
        assertTrue(report.isEnvironmentSecure());
        assertEquals(2, report.getSecureEnvironmentVariables());
        assertTrue(report.getSecureVariables().contains("DB_PASSWORD"));
        assertTrue(report.getSecureVariables().contains("API_KEY"));
    }
}

🔧 Troubleshooting

Common Security Issues

1. Encryption Key Management

// Use secure key management
EncryptionManager encryptionManager = new EncryptionManager();
encryptionManager.setKeyStore("/path/to/keystore.jks");
encryptionManager.setKeyStorePassword("keystore_password");
encryptionManager.setKeyAlias("tusklang-key");
parser.setEncryptionManager(encryptionManager);

2. Environment Variable Security

// Ensure secure environment variables
SecureEnvironment secureEnv = new SecureEnvironment();
secureEnv.setSecurePrefix("SECURE_");
secureEnv.setRequireSecurePrefix(true);
secureEnv.setValidateEnvironment(true);
parser.setSecureEnvironment(secureEnv);

3. Access Control Configuration

// Configure proper access control
AccessControl accessControl = new AccessControl();
accessControl.setDefaultDeny(true);
accessControl.setRequireAuthentication(true);
accessControl.setLogAccessAttempts(true);
parser.setAccessControl(accessControl);

📚 Best Practices

Security Strategy

1. Defense in depth

// Implement multiple security layers
SecurityConfig securityConfig = new SecurityConfig();
securityConfig.setEnableEncryption(true);
securityConfig.setEnableValidation(true);
securityConfig.setEnableAccessControl(true);
securityConfig.setEnableAuditLogging(true);
SecurityManager securityManager = new SecurityManager(securityConfig);
parser.setSecurityManager(securityManager);

2. Principle of least privilege

// Grant minimal necessary permissions
AccessControl accessControl = new AccessControl();
accessControl.setDefaultDeny(true);
// Grant specific permissions only
accessControl.addRolePermission("user", "user_config", "read");
accessControl.addRolePermission("admin", "admin_config", "read");
accessControl.addRolePermission("admin", "admin_config", "write");
parser.setAccessControl(accessControl);

3. Secure by default

// Enable security features by default
TuskLang parser = new TuskLang();
parser.setSecurityEnabled(true);
parser.setEncryptionRequired(true);
parser.setValidationRequired(true);
parser.setAuditLoggingEnabled(true);

Security Monitoring

1. Continuous security monitoring

// Set up security monitoring
SecurityMonitor monitor = new SecurityMonitor();
monitor.setAlertThreshold(5); // Alert after 5 violations
monitor.setMonitoringInterval(60); // Check every 60 seconds
parser.setSecurityMonitor(monitor);
// Monitor in background
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
scheduler.scheduleAtFixedRate(() -> {
    SecurityReport report = monitor.generateSecurityReport();
    if (report.getSecurityViolations().size() > 0) {
        sendSecurityAlert(report);
    }
}, 0, 60, TimeUnit.SECONDS);

📚 Next Steps

1. Master encryption - Understand all encryption algorithms and key management 2. Implement access control - Use role-based and attribute-based access control 3. Add security monitoring - Monitor and alert on security violations 4. Conduct security audits - Regular security assessments and penetration testing 5. Stay updated - Keep up with security best practices and vulnerabilities

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"We don't bow to any king" - You now have complete mastery of TuskLang security in Java! From basic encryption to advanced access control, you can build secure, enterprise-grade configuration systems that protect sensitive data and maintain compliance.