libproto_demo/sm4.hpp

#pragma once
#include <iostream>
#include <string>
#include <cmath>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>

static const std::string base64_chars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";

class sm4
{
public:
	static inline bool is_base64(unsigned char c)
	{
		return (isalnum(c) || (c == '+') || (c == '/'));
	}

	static std::string base64_encode(const std::string& text);

	static std::string base64_decode(const std::string& encoded_string);

	static std::string HexToStr(std::string str);

	static std::string StrToHex(std::string str);

	static std::string PKCS7(std::string str);

	static std::string BinToHex(std::string str);

	static std::string HexToBin(std::string str);

	static int HexToDec(char str);

	static std::string LeftShift(std::string str, int len);

	static std::string XOR(std::string str1, std::string str2);

	static std::string NLTransform(std::string str);

	static std::string LTransform(std::string str);

	static std::string L2Transform(std::string str);

	static std::string T(std::string str);

	static std::string T2(std::string str);

	static std::string KeyExtension(std::string MK);

	static std::string sm4_encode(std::string& hex32, std::string& key);

	static std::string sm4_decode(std::string& hex32, std::string& key);

	static std::string sm4encodestrhex(std::string text, std::string key);

	static std::string sm4decodehexstr(std::string cipher, std::string key);

	static std::string sm4encodestrbase64(std::string text, std::string key);

	static std::string sm4decodestrbase64(std::string base64_text, std::string key);

};