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Key.cpp
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Key.cpp
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/*
* Copyright (c) (2023) SPHINX_ORG
* Authors:
* - (C kusuma) <[email protected]>
* GitHub: (https://github.com/chykusuma)
* Contributors:
* - (Contributor 1) <[email protected]>
* Github: (https://github.com/yourgit)
* - (Contributor 2) <[email protected]>
* Github: (https://github.com/yourgit)
*/
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// The provided code defines various functions related to generating and working with hybrid key pairs using cryptographic algorithms like Curve448, Kyber1024, and SPHINXhash hash functions.
// Namespaces SPHINXHybridKey and SPHINXHash:
// The code starts with defining two namespaces: SPHINXHybridKey and SPHINXHash.
// SPHINXHybridKey does not contain any actual functions or data; it only has a dummy struct HybridKeypair, which is currently empty.
// SPHINXHash contains two functions: SPHINX_256 and RIPEMD_160. These functions are currently implemented as dummy functions for demonstration purposes.
// Base58 Encoding:
// The code defines a static string base58_chars which contains the characters used in Base58 encoding.
// The function EncodeBase58 takes a vector of unsigned characters as input and encodes it into a Base58 string.
// The function calculates the number of leading zeros in the input data, converts the data to a big-endian number, and then performs Base58 encoding.
// SPHINXKey Namespace:
// This namespace contains several functions related to the generation and manipulation of cryptographic keys.
// Constants CURVE448_PRIVATE_KEY_SIZE, CURVE448_PUBLIC_KEY_SIZE, and KYBER1024_PUBLIC_KEY_LENGTH define the sizes of keys for Curve448 and Kyber1024 algorithms.
// HYBRID_KEYPAIR_LENGTH is the total length of the hybrid key pair, which combines the public keys of both algorithms with extra HMAC sizes.
// calculatePublicKey Function:
// This function calculates the SPHINX public key from the private key by extracting the Kyber1024 public key from the merged private key.
// sphinxKeyToString Function:
// This function converts the binary representation of SPHINX key (private or public) to a string.
// generateAddress Function:
// This function generates a smart contract address based on the public key and contract name.
// It first converts the public key to a string, then performs SPHINX_256 and RIPEMD-160 hashes on the public key string.
// It adds a version byte (0x00) to the RIPEMD-160 hash and calculates the checksum using double SPHINX_256 hash.
// Finally, it performs Base58Check encoding to create the contract address.
// mergePrivateKeys and mergePublicKeys Functions:
// These functions are used to merge the private keys and public keys of Curve448 and Kyber1024.
// generate_hybrid_keypair Function:
// This function generates the hybrid key pair by combining the keys generated from Curve448 and Kyber1024 algorithms.
// It uses the private and public key generation functions from an external source hybrid_key.cpp, which are not defined in the provided code snippet.
// The merged private and public keys are obtained by concatenating the corresponding keys from the two algorithms and then hashing the merged private key using SPHINX_256.
// The result is stored in a struct HybridKeypair from the SPHINXHybridKey namespace.
// generate_and_perform_key_exchange Function:
// This function generates and performs a key exchange using the hybrid key pair.
// It follows similar steps as the generate_hybrid_keypair function to generate the hybrid key pair.
// It then performs a key exchange using the X448 and Kyber1024 key encapsulation mechanisms (KEM).
// It also encrypts and decrypts a sample message using Kyber1024 public key encryption (PKE) to demonstrate the use of the keys.
// printKeyPair Function:
// This function takes a name (identifier), private key, and public key as input.
// It converts the private and public keys to strings and prints them.
// It then generates a contract address based on the public key and a contract name and prints it.
// Finally, it returns the private key and public key as strings.
// The SPHINXKey namespace provides a set of utility functions to work with the SPHINX cryptographic scheme and interacts with other functions available in the SPHINXHybridKey namespace to generate a hybrid key pair and perform key exchange and encryption operations using the Kyber1024, X448, and PKE schemes.
////////////////////////////////////////////////////////////////////////////////////////////////////////
#include <string>
#include <vector>
#include <cstring>
#include <utility>
#include <iostream>
#include <algorithm>
#include <cstdint>
#include "Hybrid_key.hpp"
#include "Hash.hpp"
#include "Key.hpp"
#include "base58check.h"
#include "base58.h"
#include "hash/Ripmed160.hpp"
namespace SPHINXHybridKey {
// Assume the definition of SPHINXHybridKey
struct HybridKeypair {};
}
namespace SPHINXHash {
// Assume the definition of SPHINX_256 function
std::string SPHINX_256(const std::vector<unsigned char>& data) {
// Dummy implementation for demonstration purposes
return "hashed_" + std::string(data.begin(), data.end());
}
// Assume the definition of RIPEMD-160 function
std::string RIPEMD_160(const std::vector<unsigned char>& data) {
// Dummy implementation for demonstration purposes
return "ripemd160_" + std::string(data.begin(), data.end());
}
}
// Base58 characters (excluding confusing characters: 0, O, I, l) for address human readable
static const std::string base58_chars = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
// Function to encode data using Base58
std::string EncodeBase58(const std::vector<unsigned char>& data) {
// Count leading zeros
size_t zeros_count = 0;
for (const unsigned char byte : data) {
if (byte != 0) {
break;
}
++zeros_count;
}
// Convert the data to a big-endian number
uint64_t num = 0;
for (size_t i = zeros_count; i < data.size(); ++i) {
num = num * 256 + data[i];
}
// Calculate the necessary length for the encoded string
size_t encoded_length = (data.size() - zeros_count) * 138 / 100 + 1;
std::string encoded(encoded_length, '1');
// Encode the big-endian number in Base58
for (size_t i = 0; num > 0; ++i) {
const uint64_t remainder = num % 58;
num /= 58;
encoded[encoded_length - i - 1] = base58_chars[remainder];
}
return encoded;
}
namespace SPHINXKey {
// Constants
constexpr size_t CURVE448_PRIVATE_KEY_SIZE = 56;
constexpr size_t CURVE448_PUBLIC_KEY_SIZE = 56;
constexpr size_t KYBER1024_PUBLIC_KEY_LENGTH = 800;
// Size of HYBRIDKEY
constexpr size_t HYBRID_KEYPAIR_LENGTH = SPHINXHybridKey::CURVE448_PUBLIC_KEY_SIZE + SPHINXHybridKey::KYBER1024_PUBLIC_KEY_LENGTH + 2 * SPHINXHybridKey::HMAC_MAX_MD_SIZE;
// HYBRID_KEYPAIR_LENGTH = 56 (Curve448 public key size) + 800 (Kyber1024 public key length) + 2 * 64 (HMAC_MAX_MD_SIZE) = 976;
// Define an alias for the merged public key as SPHINXPubKey
using SPHINXPubKey = std::vector<unsigned char>;
// Define an alias for the merged private key as SPHINXPrivKey
using SPHINXPrivKey = std::vector<unsigned char>;
// Function to calculate the SPHINX public key from the private key
SPHINXKey::SPHINXPubKey calculatePublicKey(const SPHINXKey::SPHINXPrivKey& privateKey) {
// The length of the Kyber1024 public key
constexpr size_t KYBER_PUBLIC_KEY_LENGTH = SPHINXKey::KYBER1024_PUBLIC_KEY_LENGTH;
// Calculate the SPHINX public key by extracting the Kyber1024 public key from the merged private key
SPHINXKey::SPHINXPubKey sphinxPubKey(privateKey.begin() + CURVE448_PRIVATE_KEY_SIZE, privateKey.end());
return sphinxPubKey;
}
// Function to convert SPHINXKey to string
std::string sphinxKeyToString(const SPHINXKey::SPHINXKey& key) {
return std::string(key.begin(), key.end());
}
// Function to generate the smart contract address based on the public key and contract name
std::string generateAddress(const SPHINXKey::SPHINXPubKey& publicKey, const std::string& contractName) {
// Step 1: Convert the public key to a string
std::string pubKeyString = sphinxKeyToString(publicKey);
// Step 2: Perform the SPHINX_256 hash on the public key (assuming it returns a std::string)
std::string sphinxHash = SPHINXHash::SPHINX_256(pubKeyString);
// Step 3: Perform the RIPEMD-160 hash on the SPHINX_256 hash (assuming it returns a std::string)
std::string ripemd160Hash = SPHINXHash::RIPEMD_160(sphinxHash);
// Step 4: Add a version byte to the RIPEMD-160 hash (optional)
// For Bitcoin addresses, the version byte is 0x00 (mainnet). We can change it if needed.
unsigned char versionByte = 0x00;
std::string dataWithVersion(1, versionByte);
dataWithVersion += ripemd160Hash;
// Step 5: Calculate the checksum (first 4 bytes of double SPHINX_256 hash)
std::string checksum = SPHINXHash::SPHINX_256(SPHINXHash::SPHINX_256(dataWithVersion)).substr(0, 4);
// Step 6: Concatenate the data with the checksum
std::string dataWithChecksum = dataWithVersion + checksum;
// Step 7: Perform Base58Check encoding
std::string address = EncodeBase58(reinterpret_cast<const unsigned char*>(dataWithChecksum.data()),
dataWithChecksum.size());
return address;
}
// Function to merge the private keys of Curve448 and Kyber1024
SPHINXKey::SPHINXPrivKey mergePrivateKeys(const SPHINXKey::SPHINXPrivKey& curve448PrivateKey, const SPHINXKey::SPHINXPrivKey& kyberPrivateKey) {
SPHINXKey::SPHINXPrivKey mergedPrivateKey;
mergedPrivateKey.reserve(curve448PrivateKey.size() + kyberPrivateKey.size());
mergedPrivateKey.insert(mergedPrivateKey.end(), curve448PrivateKey.begin(), curve448PrivateKey.end());
mergedPrivateKey.insert(mergedPrivateKey.end(), kyberPrivateKey.begin(), kyberPrivateKey.end());
return SPHINXHash::SPHINX_256(mergedPrivateKey); // Hash the merged private key
}
// Function to merge the public keys of Curve448 and Kyber1024
SPHINXKey::SPHINXPubKey mergePublicKeys(const SPHINXKey::SPHINXPubKey& curve448PublicKey, const SPHINXKey::SPHINXPubKey& kyberPublicKey) {
SPHINXKey::SPHINXPubKey mergedPublicKey;
mergedPublicKey.reserve(curve448PublicKey.size() + kyberPublicKey.size());
mergedPublicKey.insert(mergedPublicKey.end(), curve448PublicKey.begin(), curve448PublicKey.end());
mergedPublicKey.insert(mergedPublicKey.end(), kyberPublicKey.begin(), kyberPublicKey.end());
return SPHINXHash::SPHINX_256(mergedPublicKey); // Hash the merged public key
}
// Function to generate the hybrid key pair from "hybrid_key.cpp"
SPHINXHybridKey::HybridKeypair generate_hybrid_keypair() {
// Function to merge the private keys of Curve448 and Kyber1024
auto mergePrivateKeys = [](const SPHINXKey::SPHINXPrivKey& curve448PrivateKey, const SPHINXKey::SPHINXPrivKey& kyberPrivateKey) {
SPHINXKey::SPHINXPrivKey mergedPrivateKey;
mergedPrivateKey.insert(mergedPrivateKey.end(), curve448PrivateKey.begin(), curve448PrivateKey.end());
mergedPrivateKey.insert(mergedPrivateKey.end(), kyberPrivateKey.begin(), kyberPrivateKey.end());
return SPHINXHash::SPHINX_256(mergedPrivateKey); // Hash the merged private key
};
// Function to merge the public keys of Curve448 and Kyber1024
auto mergePublicKeys = [](const SPHINXKey::SPHINXPubKey& curve448PublicKey, const SPHINXKey::SPHINXPubKey& kyberPublicKey) {
SPHINXKey::SPHINXPubKey mergedPublicKey;
mergedPublicKey.insert(mergedPublicKey.end(), curve448PublicKey.begin(), curve448PublicKey.end());
mergedPublicKey.insert(mergedPublicKey.end(), kyberPublicKey.begin(), kyberPublicKey.end());
return SPHINXHash::SPHINX_256(mergedPublicKey); // Hash the merged public key
};
// Generate Curve448 key pair from hybrid_key.cpp
SPHINXKey::SPHINXPrivKey curve448PrivateKey = generateCurve448PrivateKey();
SPHINXKey::SPHINXPubKey curve448PublicKey = generateCurve448PublicKey();
// Generate Kyber1024 key pair from hybrid_key.cpp
SPHINXKey::SPHINXPrivKey kyberPrivateKey = generateKyberPrivateKey();
SPHINXKey::SPHINXPubKey kyberPublicKey = generateKyberPublicKey();
// Merge the private keys
SPHINXKey::SPHINXPrivKey sphinxPrivKey = mergePrivateKeys(curve448PrivateKey, kyberPrivateKey);
// Merge the public keys
SPHINXKey::SPHINXPubKey sphinxPubKey = mergePublicKeys(curve448PublicKey, kyberPublicKey);
// Create the hybrid key pair structure
SPHINXHybridKey::HybridKeypair hybridKeyPair;
hybridKeyPair.merged_key.sphinxPrivKey = sphinxPrivKey;
hybridKeyPair.merged_key.sphinxPubKey = sphinxPubKey;
return hybridKeyPair;
}
// Function to generate and perform key exchange hybrid method from "hybrid_key.cpp"
SPHINXHybridKey::HybridKeypair generate_and_perform_key_exchange() {
// Function to merge the private keys of Curve448 and Kyber1024
auto mergePrivateKeys = [](const SPHINXKey::SPHINXPrivKey& curve448PrivateKey, const SPHINXKey::SPHINXPrivKey& kyberPrivateKey) {
SPHINXKey::SPHINXPrivKey mergedPrivateKey;
mergedPrivateKey.insert(mergedPrivateKey.end(), curve448PrivateKey.begin(), curve448PrivateKey.end());
mergedPrivateKey.insert(mergedPrivateKey.end(), kyberPrivateKey.begin(), kyberPrivateKey.end());
return SPHINXHash::SPHINX_256(mergedPrivateKey); // Hash the merged private key
};
// Function to merge the public keys of Curve448 and Kyber1024
auto mergePublicKeys = [](const SPHINXKey::SPHINXPubKey& curve448PublicKey, const SPHINXKey::SPHINXPubKey& kyberPublicKey) {
SPHINXKey::SPHINXPubKey mergedPublicKey;
mergedPublicKey.insert(mergedPublicKey.end(), curve448PublicKey.begin(), curve448PublicKey.end());
mergedPublicKey.insert(mergedPublicKey.end(), kyberPublicKey.begin(), kyberPublicKey.end());
return SPHINXHash::SPHINX_256(mergedPublicKey); // Hash the merged public key
};
// Generate Curve448 key pair
SPHINXKey::SPHINXPrivKey curve448PrivateKey = SPHINXHybridKey::generateCurve448PrivateKey();
SPHINXKey::SPHINXPubKey curve448PublicKey = SPHINXHybridKey::generateCurve448PublicKey();
// Generate Kyber1024 key pair
SPHINXKey::SPHINXPrivKey kyberPrivateKey = SPHINXHybridKey::generateKyberPrivateKey();
SPHINXKey::SPHINXPubKey kyberPublicKey = SPHINXHybridKey::generateKyberPublicKey();
// Merge the private keys
SPHINXKey::SPHINXPrivKey sphinxPrivKey = mergePrivateKeys(curve448PrivateKey, kyberPrivateKey);
// Merge the public keys
SPHINXKey::SPHINXPubKey sphinxPubKey = mergePublicKeys(curve448PublicKey, kyberPublicKey);
// Create the hybrid key pair structure
SPHINXHybridKey::HybridKeypair hybridKeyPair;
hybridKeyPair.merged_key.sphinxPrivKey = sphinxPrivKey;
hybridKeyPair.merged_key.sphinxPubKey = sphinxPubKey;
// Perform the key exchange using X448 and Kyber1024 KEM
std::vector<uint8_t> encapsulated_key;
std::string shared_secret = SPHINXHybridKey::encapsulateHybridSharedSecret(hybridKeyPair, encapsulated_key);
// Decapsulate the shared secret using Kyber1024 KEM
std::string decapsulated_shared_secret = SPHINXHybridKey::decapsulateHybridSharedSecret(hybridKeyPair, encapsulated_key);
// Check if the decapsulated shared secret matches the original shared secret
if (decapsulated_shared_secret == shared_secret) {
std::cout << "Decapsulation successful. Shared secrets match." << std::endl;
} else {
std::cout << "Decapsulation failed. Shared secrets do not match." << std::endl;
}
// Example message to be encrypted
std::string message = "Hello, this is a secret message.";
// Encrypt the message using Kyber1024 PKE with the public key
std::string encrypted_message = SPHINXHybridKey::encryptMessage(message, hybridKeyPair.public_key_pke);
// Decrypt the message using Kyber1024 PKE with the secret key
std::string decrypted_message = SPHINXHybridKey::decryptMessage(encrypted_message, hybridKeyPair.secret_key_pke);
// Print the original message, encrypted message, and decrypted message
std::cout << "Original Message: " << message << std::endl;
std::cout << "Encrypted Message: " << encrypted_message << std::endl;
std::cout << "Decrypted Message: " << decrypted_message << std::endl;
// Return the shared secret as specified in the function signature
return shared_secret;
}
// Function to print the generated keys and return them as strings
std::pair<std::string, std::string> printKeyPair(const std::string& name, const SPHINXKey::SPHINXPrivKey& privateKey, const SPHINXKey::SPHINXPubKey& publicKey) {
// Convert private key to string
std::string privKeyString = sphinxKeyToString(privateKey);
// Convert public key to string
std::string pubKeyString = sphinxKeyToString(publicKey);
// Print the private and public keys
std::cout << name << " private key: " << privKeyString << std::endl;
std::cout << name << " public key: " << pubKeyString << std::endl;
// Generate and print the contract address
std::string contractName = "MyContract";
std::string contractAddress = generateAddress(publicKey, contractName);
std::cout << "Contract Address: " << contractAddress << std::endl;
// Return the keys and contract address as strings
return std::make_pair(privKeyString, pubKeyString);
}
} // namespace SPHINXKey
// Usage
int main() {
// Generate the hybrid key pair
SPHINXHybridKey::HybridKeypair hybridKeyPair = SPHINXKey::generate_hybrid_keypair();
// Print the hybrid key pair
std::cout << "Hybrid Key Pair:" << std::endl;
std::cout << "Merged Private Key: ";
for (const auto& byte : hybridKeyPair.merged_key.sphinxPrivKey) {
std::cout << std::hex << static_cast<int>(byte);
}
std::cout << std::endl;
std::cout << "Merged Public Key: ";
for (const auto& byte : hybridKeyPair.merged_key.sphinxPubKey) {
std::cout << std::hex << static_cast<int>(byte);
}
std::cout << std::endl;
// Generate and perform key exchange
SPHINXHybridKey::HybridKeypair exchangedKeys = SPHINXKey::generate_and_perform_key_exchange();
// Print the shared secret (Example: For demonstration purposes)
std::cout << "Shared Secret: ";
for (const auto& byte : exchangedKeys.shared_secret) {
std::cout << std::hex << static_cast<int>(byte);
}
std::cout << std::endl;
// Call the printKeyPair function to print and get the keys and address as strings
std::pair<std::string, std::string> keys = SPHINXKey::printKeyPair("ExampleKeyPair", exchangedKeys.merged_key.sphinxPrivKey, exchangedKeys.merged_key.sphinxPubKey);
// Access the keys and contract address as strings
std::string private_key_str = keys.first;
std::string public_key_str = keys.second;
// Example usage: print the keys and contract address
std::cout << "Private Key as String: " << private_key_str << std::endl;
std::cout << "Public Key as String: " << public_key_str << std::endl;
return 0;
}