Method encrypt_data

src/Core/WalletHDsqlite.cpp:232–248

}

BinaryArray WalletHDsqlite::encrypt_data(const chacha_key &wallet_key, const BinaryArray &data) {
	const size_t MIN_SIZE   = 256;
	const size_t EXTRA_SIZE = sizeof(Hash) + 4;  // iv, actual size in le
	size_t actual_size      = 1;
	while (actual_size < data.size() + EXTRA_SIZE || actual_size < MIN_SIZE)
		actual_size *= 2;
	BinaryArray large_data(actual_size - sizeof(Hash));
	uint_le_to_bytes(large_data.data(), 4, data.size());
	memcpy(large_data.data() + 4, data.data(), data.size());
	BinaryArray enc_data(sizeof(Hash) + large_data.size());
	Hash iv = crypto::rand<Hash>();
	memcpy(enc_data.data(), iv.data, sizeof(iv));
	const BinaryArray key_data = wallet_key.as_binary_array() | iv.as_binary_array();
	chacha_key key{cn_fast_hash(key_data)};
	chacha(20, large_data.data(), large_data.size(), key, chacha_iv{}, enc_data.data() + sizeof(Hash));
	return enc_data;
}

BinaryArray WalletHDsqlite::decrypt_data(const chacha_key &wallet_key, const uint8_t *value_data, size_t value_size) {
	Hash iv;