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sha1.h
executable file
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sha1.h
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#ifndef Sha1_h
#define Sha1_h
#include <inttypes.h>
#include "Print.h"
#define HASH_LENGTH 20
#define BLOCK_LENGTH 64
union _buffer {
uint8_t b[BLOCK_LENGTH];
uint32_t w[BLOCK_LENGTH/4];
};
union _state {
uint8_t b[HASH_LENGTH];
uint32_t w[HASH_LENGTH/4];
};
class Sha1Class : public Print
{
public:
void init(void);
void initHmac(const uint8_t* secret, int secretLength);
uint8_t* result(void);
uint8_t* resultHmac(void);
#if defined(ARDUINO) && ARDUINO >= 100
virtual size_t write(uint8_t);
#else
virtual void write(uint8_t);
#endif
using Print::write;
private:
void pad();
void addUncounted(uint8_t data);
void hashBlock();
uint32_t rol32(uint32_t number, uint8_t bits);
_buffer buffer;
uint8_t bufferOffset;
_state state;
uint32_t byteCount;
uint8_t keyBuffer[BLOCK_LENGTH];
uint8_t innerHash[HASH_LENGTH];
};
extern Sha1Class Sha1;
#endif