hsm_security_integration_example.cpp

/*
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║ ThemisDB - Hybrid Database System                                   ║
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  File:            hsm_security_integration_example.cpp               ║
  Version:         0.0.47                                             ║
  Last Modified:   2026-04-15 18:43:54                                ║
  Author:          unknown                                            ║
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  Quality Metrics:                                                    ║
    • Maturity Level:  🟡 RELEASE-CANDIDATE                            ║
    • Quality Score:   66.0/100                                       ║
    • Total Lines:     194                                            ║
    • Open Issues:     TODOs: 0, Stubs: 8                             ║
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  Status: ⚠️  Needs Work                                              ║
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 */

/**
 * Example: HSM Security Integration in Server
 * 
 * This example shows how to integrate HSM security checks into
 * the ThemisDB server to enforce production safety requirements.
 * 
 * Addresses: FIND-002 - HSM Stub Provider Security
 */

#include "security/hsm_provider.h"
#include "security/hsm_security_checker.h"
#include "utils/logger.h"
#include <thread>
#include <chrono>
#include <atomic>

using namespace themis::security;

// Example server class showing HSM integration
class ExampleServer {
public:
    ExampleServer(HSMConfig hsm_config) 
        : hsm_(hsm_config), running_(false) {
    }
    
    /**
     * Initialize server with HSM security validation
     * Returns false if security validation fails in production
     */
    bool initialize(int argc, char* argv[]) {
        THEMIS_INFO("Initializing ThemisDB server...");
        
        // Initialize HSM provider
        if (!hsm_.initialize()) {
            THEMIS_ERROR("HSM provider initialization failed!");
            return false;
        }
        
        // Validate production safety
        if (!HSMSecurityChecker::validateProductionSafety(hsm_, argc, argv)) {
            // Production safety check failed - must exit
            THEMIS_CRITICAL("Server startup aborted due to HSM security violation");
            return false;
        }
        
        // Log HSM status
        THEMIS_INFO("HSM Provider initialized:");
        THEMIS_INFO("  Status: {}", hsm_.getTokenInfo());
        THEMIS_INFO("  Stub Provider: {}", hsm_.isStubProvider() ? "YES (INSECURE)" : "NO (Secure)");
        THEMIS_INFO("  Production Mode: {}", HSMSecurityChecker::isProductionMode() ? "YES" : "NO");
        
        return true;
    }
    
    /**
     * Start server with periodic security checks
     */
    void start() {
        running_ = true;
        
        // Start periodic security check thread
        security_check_thread_ = std::thread([this]() {
            periodicSecurityCheckLoop();
        });
        
        THEMIS_INFO("Server started successfully");
        
        // Main server loop would go here...
        // For this example, just wait
        while (running_) {
            std::this_thread::sleep_for(std::chrono::seconds(1));
        }
    }
    
    /**
     * Stop server
     */
    void stop() {
        running_ = false;
        if (security_check_thread_.joinable()) {
            security_check_thread_.join();
        }
        hsm_.finalize();
    }
    
private:
    /**
     * Periodic security check loop (runs every 5 minutes)
     */
    void periodicSecurityCheckLoop() {
        while (running_) {
            // Sleep for 5 minutes (300 seconds)
            for (int i = 0; i < 300 && running_; ++i) {
                std::this_thread::sleep_for(std::chrono::seconds(1));
            }
            
            if (!running_) break;
            
            // Run HSM security check
            hsm_.periodicSecurityCheck();
            
            // Additional production mode check
            std::string warning = HSMSecurityChecker::getPeriodicWarning(hsm_);
            if (!warning.empty()) {
                THEMIS_ERROR("{}", warning);
            }
        }
    }
    
    HSMProvider hsm_;
    std::atomic<bool> running_;
    std::thread security_check_thread_;
};

// Example main function showing integration
int example_main(int argc, char* argv[]) {
    // Initialize logger
    themis::utils::Logger::init("themis_server.log", themis::utils::Logger::Level::INFO);
    
    THEMIS_INFO("=== ThemisDB Server ===");
    THEMIS_INFO("Version: 1.4.2");
    
    // Configure HSM
    HSMConfig hsm_config;
    // Load from config file in real implementation
    hsm_config.library_path = "";  // Empty = stub for this example
    hsm_config.key_label = "themis-master-key";
    
    // Create and initialize server
    ExampleServer server(hsm_config);
    
    if (!server.initialize(argc, argv)) {
        THEMIS_CRITICAL("Server initialization failed!");
        return EXIT_FAILURE;  // Exit with error code
    }
    
    // Start server (would include signal handlers in real implementation)
    try {
        server.start();
    } catch (const std::exception& e) {
        THEMIS_ERROR("Server error: {}", e.what());
        server.stop();
        return EXIT_FAILURE;
    }
    
    server.stop();
    THEMIS_INFO("Server shutdown complete");
    return EXIT_SUCCESS;
}

/**
 * Usage Examples:
 * 
 * 1. Development mode (stub allowed):
 *    $ ./themis_server --config config/development.yaml
 *    > Server starts with stub provider warnings
 * 
 * 2. Production mode with real HSM:
 *    $ export THEMIS_PRODUCTION_MODE=true
 *    $ ./themis_server --config config/production.yaml
 *    > Server starts with real HSM (no warnings)
 * 
 * 3. Production mode with stub (BLOCKED):
 *    $ export THEMIS_PRODUCTION_MODE=true
 *    $ ./themis_server --config config/development.yaml
 *    > CRITICAL ERROR - Server exits with code 1
 * 
 * 4. Production mode with stub override (NOT RECOMMENDED):
 *    $ export THEMIS_PRODUCTION_MODE=true
 *    $ ./themis_server --config config/development.yaml --allow-stub-hsm
 *    > Server starts with CRITICAL WARNING
 */