2401C++,C++编译时自动加密

编译时加密串

编译时加密串,运行时动态解密.此自定义加密算法可增加破解的难度,因为攻击者不仅需要逆向工程代码,还需要理解加密算法.
这样对代码的改动小,不影响代码可读性.
下面是使用boost.hana编译时加密串的示例:

#include <string>
#include <iostream>
#include <boost/hana/string.hpp>
#include <boost/hana/tuple.hpp>
#include <boost/hana/transform.hpp>
namespace hana = boost::hana;
inline constexpr char EncryptChar(char ch) {return ch == 'z'   ch : ch ^ 'z';
}
template <typename HANA_STR>
constexpr auto EncryptString(HANA_STR hana_str) {constexpr auto hana_tuple = hana::to_tuple(hana_str);constexpr auto encrypted_tuple = hana::transform(hana_tuple, [](auto x) {constexpr char ch = hana::value(x);return hana::integral_c<char, EncryptChar(ch)>;});constexpr auto encrypted_str = hana::unpack(encrypted_tuple, hana::make<hana::string_tag>);return encrypted_str.c_str();
}
std::string DecryptString(std::string encryped_str) {for (char& ch : encryped_str)if(ch != 'z')ch ^= 'z';return std::move(encryped_str);
}
#define ENCRYPT_STR(str) DecryptString(EncryptString(BOOST_HANA_STRING(str)))
int main() {std::cout << ENCRYPT_STR("你好") << ",世界!" << std::endl;std::cout << ENCRYPT_STR("hello") << ", world!" << std::endl;return 0;
}

开发环境:Windows11,VS202217.8.4,Boost1.84,C++17,C++20
用记事本打开编译后的exe,无法搜索到"你好",“hello”,可搜索到没有加密的",世界!"和",world!".
输出:

你好,世界!
hello, world!