Class CSHA256

src/crypto/sha256.h:14–34

A hasher class for SHA-256. */

/** A hasher class for SHA-256. */
class CSHA256
{
private:
    uint32_t s[8];
    unsigned char buf[64];
    uint64_t bytes;

public:
    static const size_t OUTPUT_SIZE = 32;

    CSHA256();
    CSHA256& Write(const unsigned char* data, size_t len);
    void Finalize(unsigned char hash[OUTPUT_SIZE]);
    //TODO: Midstate is a hack'ish speedup that probably should make way for something
    //akin to the SHA256D64 speedups
    void Midstate(unsigned char hash[OUTPUT_SIZE], uint64_t* len, unsigned char *buffer);
    std::vector<unsigned char> Save() const;
    bool Load(const std::vector<unsigned char>& vch);
    CSHA256& Reset();
    bool SafeWrite(const unsigned char* data, size_t len);
};

/** Autodetect the best available SHA256 implementation.
 *  Returns the name of the implementation.