ylib/include/util/md5.h

// MD5.h
#ifndef BZF_MD5_H
#define BZF_MD5_H

#include <iostream>
#include <string>
#include "base/buffer.h"
namespace ylib
{
        class  MD5
        {
        public:
            typedef unsigned int size_type; // must be 32bit

            MD5();
            MD5(const ylib::buffer& value);
            void update(const unsigned char* buf, size_type length);
            void update(const char* buf, size_type length);
            MD5& finalize();
            std::string hexdigest() const;
            friend std::ostream& operator<<(std::ostream&, MD5 md5);

        private:
            void init();
            typedef unsigned char uint1; //  8bit
            typedef unsigned int uint4;  // 32bit
            enum { blocksize = 64 };     // VC6 won't eat a const static int here

            void transform(const uint1 block[blocksize]);
            static void decode(uint4 output[], const uint1 input[], size_type len);
            static void encode(uint1 output[], const uint4 input[], size_type len);

            bool finalized;
            uint1 buffer[blocksize]; // bytes that didn't fit in last 64 byte chunk
            uint4 count[2];          // 64bit counter for number of bits (lo, hi)
            uint4 state[4];          // digest so far
            uint1 digest[16];        // the result

            // low level logic operations
            static inline uint4 F(uint4 x, uint4 y, uint4 z);
            static inline uint4 G(uint4 x, uint4 y, uint4 z);
            static inline uint4 H(uint4 x, uint4 y, uint4 z);
            static inline uint4 I(uint4 x, uint4 y, uint4 z);
            static inline uint4 rotate_left(uint4 x, int n);
            static inline void FF(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
            static inline void GG(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
            static inline void HH(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
            static inline void II(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
        };
}


#endif