Wstępnie dodana klasa zarządzania szyfrowaniem. Dodana funckja szyfrująca i generowanie kluczy. Nie osadzono w klasie create cargo

EncryptionManager.cpp

@@ -0,0 +1,28 @@
+#include "EncryptionManager.h"
+
+EncryptionManager::EncryptionManager()
+{
+	if (sodium_init() < 0) {
+		throw std::runtime_error("libsodium init failed");
+	}
+}
+
+std::vector<char> EncryptionManager::encrypt(const std::vector<char>& raw)
+{
+	randombytes_buf(key.data(), key.size());
+	randombytes_buf(nonce.data(), nonce.size());
+
+	std::vector<char> crypt(raw.size());
+
+    if (crypto_stream_chacha20_ietf_xor_ic(
+        reinterpret_cast<unsigned char*>(crypt.data()),
+        reinterpret_cast<const unsigned char*>(raw.data()),
+        static_cast<unsigned long long>(raw.size()),
+        nonce.data(),
+        0,
+        key.data()) != 0) {
+        throw std::runtime_error("crypto_stream_chacha20_ietf_xor_ic failed");
+    }
+
+    return crypt;
+}