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- #ifndef SHA256_H
- #define SHA256_H
- #include <string>
- class SHA256
- {
- protected:
- typedef unsigned char uint8;
- typedef unsigned int uint32;
- typedef unsigned long long uint64;
- const static uint32 sha256_k[];
- static const unsigned int SHA224_256_BLOCK_SIZE = (512/8);
- public:
- void init();
- void update(const unsigned char *message, unsigned int len);
- void final(unsigned char *digest);
- static const unsigned int DIGEST_SIZE = ( 256 / 8);
- protected:
- void transform(const unsigned char *message, unsigned int block_nb);
- unsigned int m_tot_len;
- unsigned int m_len;
- unsigned char m_block[2*SHA224_256_BLOCK_SIZE];
- uint32 m_h[8];
- };
- std::string sha256(std::string input);
- #define SHA2_SHFR(x, n) (x >> n)
- #define SHA2_ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
- #define SHA2_ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
- #define SHA2_CH(x, y, z) ((x & y) ^ (~x & z))
- #define SHA2_MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
- #define SHA256_F1(x) (SHA2_ROTR(x, 2) ^ SHA2_ROTR(x, 13) ^ SHA2_ROTR(x, 22))
- #define SHA256_F2(x) (SHA2_ROTR(x, 6) ^ SHA2_ROTR(x, 11) ^ SHA2_ROTR(x, 25))
- #define SHA256_F3(x) (SHA2_ROTR(x, 7) ^ SHA2_ROTR(x, 18) ^ SHA2_SHFR(x, 3))
- #define SHA256_F4(x) (SHA2_ROTR(x, 17) ^ SHA2_ROTR(x, 19) ^ SHA2_SHFR(x, 10))
- #define SHA2_UNPACK32(x, str) \
- { \
- *((str) + 3) = (uint8) ((x) ); \
- *((str) + 2) = (uint8) ((x) >> 8); \
- *((str) + 1) = (uint8) ((x) >> 16); \
- *((str) + 0) = (uint8) ((x) >> 24); \
- }
- #define SHA2_PACK32(str, x) \
- { \
- *(x) = ((uint32) *((str) + 3) ) \
- | ((uint32) *((str) + 2) << 8) \
- | ((uint32) *((str) + 1) << 16) \
- | ((uint32) *((str) + 0) << 24); \
- }
- #endif
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