include/Encryption.hpp


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#pragma once

/*
 * Encrypts/decrypts data using xchacha20
 */

#include <string>

namespace odhtdb
{
    const int NONCE_BYTE_SIZE = 24;
    
    struct EncryptedData
    {
        char nonce[NONCE_BYTE_SIZE];
        std::string data;
    };
    
    using EncryptionKey = char[32];
    
    // Stores randomly generated encryption key in @output
    void generateEncryptionKey(EncryptionKey *output);
    
    // Returns 0 on success, storing encrypted data in @output
    int encrypt(EncryptedData *output, const EncryptionKey *key, const void *data, size_t dataSize);
    
    // Returns 0 on success, storing decrypted data in @output
    int decrypt(std::string *output, const EncryptionKey *key, const EncryptedData *encryptedData);
}