You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
2.0 KiB
61 lines
2.0 KiB
#ifndef BZF_MD5_H |
|
#define BZF_MD5_H |
|
|
|
#include <cstring> |
|
#include <iostream> |
|
|
|
|
|
// a small class for calculating MD5 hashes of strings or byte arrays |
|
// it is not meant to be fast or secure |
|
// |
|
// usage: 1) feed it blocks of uchars with update() |
|
// 2) finalize() |
|
// 3) get hexdigest() string |
|
// or |
|
// MD5(std::string).hexdigest() |
|
// |
|
// assumes that char is 8 bit and int is 32 bit |
|
class MD5 |
|
{ |
|
public: |
|
typedef unsigned int size_type; // must be 32bit |
|
|
|
MD5(); |
|
MD5(const std::string& text); |
|
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); |
|
}; |
|
|
|
std::string md5(const std::string str); |
|
|
|
#endif |