rc5.hpp

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#ifndef RC5_HPP
#define RC5_HPP
 
#include <cstdint>
#include <vector>
 
namespace gpmp {
 
namespace nt {
 
class RC5 {
  public:
    RC5(uint32_t rounds = 12, uint32_t wordSize = 32, uint32_t blockSize = 16);
 
    void encrypt(uint32_t &A, uint32_t &B);
 
    void decrypt(uint32_t &A, uint32_t &B);
 
  private:
    uint32_t rotl(uint32_t value, uint32_t shift);
    uint32_t rotr(uint32_t value, uint32_t shift);
    void init();
 
    uint32_t w, r, b;
    std::vector<uint32_t> S;
 
    const uint32_t P = 0xB7E15163;
    const uint32_t Q = 0x9E3779B9;
};
 
} // namespace nt
 
} // namespace gpmp
 
#endif