Method _close

compat/file_access_encrypted_v3.cpp:113–152

}

void FileAccessEncryptedv3::_close() {
	if (file.is_null()) {
		return;
	}

	if (writing) {
		Vector<uint8_t> compressed;
		uint64_t len = data.size();
		if (len % 16) {
			len += 16 - (len % 16);
		}

		unsigned char hash[16];
		ERR_FAIL_COND(CryptoCore::md5(data.ptr(), data.size(), hash) != OK); // Bug?

		compressed.resize(len);
		memset(compressed.ptrw(), 0, len);
		for (int i = 0; i < data.size(); i++) {
			compressed.write[i] = data[i];
		}

		CryptoCore::AESContext ctx;
		ctx.set_encode_key(key.ptrw(), 256);

		for (uint64_t i = 0; i < len; i += 16) {
			ctx.encrypt_ecb(&compressed.write[i], &compressed.write[i]);
		}

		file->store_32(ENCRYPTED_HEADER_MAGIC);
		file->store_32(mode);

		file->store_buffer(hash, 16);
		file->store_64(data.size());

		file->store_buffer(compressed.ptr(), compressed.size());
		data.clear();
	}

	file.unref();
}

bool FileAccessEncryptedv3::is_open() const {
	return file != nullptr;