SHA256CryptoServiceProvider.h

#ifndef SHA256_SHA256CRYPTOSERVICEPROVIDER_H
#define SHA256_SHA256CRYPTOSERVICEPROVIDER_H

#include <string>

class SHA256CryptoServiceProvider {

public:
    SHA256CryptoServiceProvider();
    static std::string Hashing(const std::string& inputMessage);
private:
    uint8_t  words[64]{};
    uint32_t lengthBlock{};
    uint64_t lengthBits{};
    uint32_t H[8]{};
    uint32_t K[64] = {0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
                      0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
                      0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
                      0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
                      0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
                      0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
                      0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
                      0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
                      0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
                      0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
                      0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
                      0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
                      0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
                      0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
                      0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
                      0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};

    void InitialState(uint32_t H[]);
    static uint32_t CircularRightRotate(uint32_t x, uint32_t n);
    static uint32_t CH(uint32_t x, uint32_t y, uint32_t z);
    static uint32_t MAJ(uint32_t x, uint32_t y, uint32_t z);
    static uint32_t BSIG0(uint32_t x);
    static uint32_t BSIG1(uint32_t x);
    static uint32_t SSIG0(uint32_t x);
    static uint32_t SSIG1(uint32_t x);
    void ProcessBlock();
    void PadInputMessage();
    void ToBigEndian(uint8_t * hash);
    void Update(const std::string &data);
    std::string FinalProcess();
    void PadTotalInputMessageLength();
};

#endif //SHA256_SHA256CRYPTOSERVICEPROVIDER_H