Operaciones de generacion de claves, D-H, firma y validacion.

Dependencies:   mbed CyaSSL

Committer:
saranieves92
Date:
Fri Feb 20 18:37:50 2015 +0000
Revision:
5:4f619b9a7bb2
Parent:
3:74a69ff114ba
intento de rsa

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saranieves92 3:74a69ff114ba 1 #ifndef SHA256_H
saranieves92 3:74a69ff114ba 2 #define SHA256_H
saranieves92 3:74a69ff114ba 3 #include <string>
saranieves92 3:74a69ff114ba 4
saranieves92 3:74a69ff114ba 5 class SHA256
saranieves92 3:74a69ff114ba 6 {
saranieves92 3:74a69ff114ba 7 protected:
saranieves92 3:74a69ff114ba 8 typedef unsigned char uint8;
saranieves92 3:74a69ff114ba 9 typedef unsigned int uint32;
saranieves92 3:74a69ff114ba 10 typedef unsigned long long uint64;
saranieves92 3:74a69ff114ba 11
saranieves92 3:74a69ff114ba 12 const static uint32 sha256_k[];
saranieves92 3:74a69ff114ba 13 static const unsigned int SHA224_256_BLOCK_SIZE = (512/8);
saranieves92 3:74a69ff114ba 14 public:
saranieves92 3:74a69ff114ba 15 void init();
saranieves92 3:74a69ff114ba 16 void update(const unsigned char *message, unsigned int len);
saranieves92 3:74a69ff114ba 17 void final(unsigned char *digest);
saranieves92 3:74a69ff114ba 18 static const unsigned int DIGEST_SIZE = ( 256 / 8);
saranieves92 3:74a69ff114ba 19
saranieves92 3:74a69ff114ba 20 protected:
saranieves92 3:74a69ff114ba 21 void transform(const unsigned char *message, unsigned int block_nb);
saranieves92 3:74a69ff114ba 22 unsigned int m_tot_len;
saranieves92 3:74a69ff114ba 23 unsigned int m_len;
saranieves92 3:74a69ff114ba 24 unsigned char m_block[2*SHA224_256_BLOCK_SIZE];
saranieves92 3:74a69ff114ba 25 uint32 m_h[8];
saranieves92 3:74a69ff114ba 26 };
saranieves92 3:74a69ff114ba 27
saranieves92 3:74a69ff114ba 28 std::string sha256(std::string input);
saranieves92 3:74a69ff114ba 29
saranieves92 3:74a69ff114ba 30 #define SHA2_SHFR(x, n) (x >> n)
saranieves92 3:74a69ff114ba 31 #define SHA2_ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
saranieves92 3:74a69ff114ba 32 #define SHA2_ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
saranieves92 3:74a69ff114ba 33 #define SHA2_CH(x, y, z) ((x & y) ^ (~x & z))
saranieves92 3:74a69ff114ba 34 #define SHA2_MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
saranieves92 3:74a69ff114ba 35 #define SHA256_F1(x) (SHA2_ROTR(x, 2) ^ SHA2_ROTR(x, 13) ^ SHA2_ROTR(x, 22))
saranieves92 3:74a69ff114ba 36 #define SHA256_F2(x) (SHA2_ROTR(x, 6) ^ SHA2_ROTR(x, 11) ^ SHA2_ROTR(x, 25))
saranieves92 3:74a69ff114ba 37 #define SHA256_F3(x) (SHA2_ROTR(x, 7) ^ SHA2_ROTR(x, 18) ^ SHA2_SHFR(x, 3))
saranieves92 3:74a69ff114ba 38 #define SHA256_F4(x) (SHA2_ROTR(x, 17) ^ SHA2_ROTR(x, 19) ^ SHA2_SHFR(x, 10))
saranieves92 3:74a69ff114ba 39 #define SHA2_UNPACK32(x, str) \
saranieves92 3:74a69ff114ba 40 { \
saranieves92 3:74a69ff114ba 41 *((str) + 3) = (uint8) ((x) ); \
saranieves92 3:74a69ff114ba 42 *((str) + 2) = (uint8) ((x) >> 8); \
saranieves92 3:74a69ff114ba 43 *((str) + 1) = (uint8) ((x) >> 16); \
saranieves92 3:74a69ff114ba 44 *((str) + 0) = (uint8) ((x) >> 24); \
saranieves92 3:74a69ff114ba 45 }
saranieves92 3:74a69ff114ba 46 #define SHA2_PACK32(str, x) \
saranieves92 3:74a69ff114ba 47 { \
saranieves92 3:74a69ff114ba 48 *(x) = ((uint32) *((str) + 3) ) \
saranieves92 3:74a69ff114ba 49 | ((uint32) *((str) + 2) << 8) \
saranieves92 3:74a69ff114ba 50 | ((uint32) *((str) + 1) << 16) \
saranieves92 3:74a69ff114ba 51 | ((uint32) *((str) + 0) << 24); \
saranieves92 3:74a69ff114ba 52 }
saranieves92 3:74a69ff114ba 53 #endif