Create crypto.h

blockchain_integration/pi_network/dapi/blockchain/consensus/quantum_resistant/lattice_based/crypto.h

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+#ifndef LATTICE_BASED_CRYPTO_H
+#define LATTICE_BASED_CRYPTO_H
+
+#include <iostream>
+#include <vector>
+#include <cstdint>
+#include <stdexcept>
+#include <memory>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <future>
+
+// Lattice-based cryptography parameters
+const int N = 1024; // Lattice dimension
+const int Q = 2048; // Modulus
+const int D = 256; // Gaussian distribution parameter
+const int SEED_SIZE = 32; // Seed size for random number generator
+const int NUM_THREADS = 4; // Number of threads for parallelization
+
+// Lattice-based cryptography functions
+void generate_keypair(std::vector<uint32_t>& public_key, std::vector<uint32_t>& private_key, const std::vector<uint8_t>& seed);
+void encrypt(const std::vector<uint32_t>& public_key, const std::vector<uint32_t>& plaintext, std::vector<uint32_t>& ciphertext);
+void decrypt(const std::vector<uint32_t>& private_key, const std::vector<uint32_t>& ciphertext, std::vector<uint32_t>& plaintext);
+
+// Gaussian distribution function
+uint32_t gaussian_distribution(uint32_t x, uint32_t y);
+
+// Secure random number generator
+class SecureRNG {
+public:
+  SecureRNG(const std::vector<uint8_t>& seed);
+  uint32_t generate();
+private:
+  std::vector<uint8_t> seed_;
+  std::mt19937 gen_;
+};
+
+// Exception class for cryptographic errors
+class CryptoError : public std::runtime_error {
+public:
+  CryptoError(const std::string& message) : std::runtime_error(message) {}
+};
+
+// Thread pool for parallelization
+class ThreadPool {
+public:
+  ThreadPool(int num_threads);
+  ~ThreadPool();
+  void enqueue(std::function<void()> task);
+private:
+  std::vector<std::thread> threads_;
+  std::mutex mutex_;
+  std::condition_variable cv_;
+  std::queue<std::function<void()>> tasks_;
+};
+
+// Homomorphic encryption scheme
+class HomomorphicEncryption {
+public:
+  HomomorphicEncryption(const std::vector<uint32_t>& public_key);
+  ~HomomorphicEncryption();
+  void encrypt(const std::vector<uint32_t>& plaintext, std::vector<uint32_t>& ciphertext);
+  void decrypt(const std::vector<uint32_t>& ciphertext, std::vector<uint32_t>& plaintext);
+  void add(const std::vector<uint32_t>& ciphertext1, const std::vector<uint32_t>& ciphertext2, std::vector<uint32_t>& result);
+  void multiply(const std::vector<uint32_t>& ciphertext1, const std::vector<uint32_t>& ciphertext2, std::vector<uint32_t>& result);
+private:
+  std::vector<uint32_t> public_key_;
+  std::vector<uint32_t> private_key_;
+};
+
+// Zero-knowledge proof scheme
+class ZeroKnowledgeProof {
+public:
+  ZeroKnowledgeProof(const std::vector<uint32_t>& public_key);
+  ~ZeroKnowledgeProof();
+  void prove(const std::vector<uint32_t>& statement, std::vector<uint32_t>& proof);
+  void verify(const std::vector<uint32_t>& statement, const std::vector<uint32_t>& proof, bool& result);
+private:
+  std::vector<uint32_t> public_key_;
+  std::vector<uint32_t> private_key_;
+};
+
+#endif // LATTICE_BASED_CRYPTO_H