#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "md5.c"
int main(int argc, char* argv[])
{
int i
unsigned char encrypt[] = "admin"//21232f297a57a5a743894a0e4a801fc3
unsigned char decrypt[16]
MD5_CTX md5
MD5Init(&md5)
MD5Update(&md5, encrypt, strlen((char*)encrypt))
MD5Final(&md5, decrypt)
printf("加密前:%s\n加密后:", encrypt)
for (i = 0i <16i++)
{
printf("%02x", decrypt[i])
}
getchar()
return 0
}
md5.c
#include <memory.h>
#include "md5.h"
unsigned char PADDING[] = { 0x80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
void MD5Init(MD5_CTX* context)
{
context->count[0] = 0
context->count[1] = 0
context->state[0] = 0x67452301
context->state[1] = 0xEFCDAB89
context->state[2] = 0x98BADCFE
context->state[3] = 0x10325476
}
void MD5Update(MD5_CTX* context, unsigned char* input, unsigned int inputlen)
{
unsigned int i = 0, index = 0, partlen = 0
index = (context->count[0] >>3) &0x3F
partlen = 64 - index
context->count[0] += inputlen <<3
if (context->count[0] <(inputlen <<3))
context->count[1]++
context->count[1] += inputlen >>29
if (inputlen >= partlen)
{
memcpy(&context->buffer[index], input, partlen)
MD5Transform(context->state, context->buffer)
for (i = partleni + 64 <= inputleni += 64)
MD5Transform(context->state, &input[i])
index = 0
}
else
{
i = 0
}
memcpy(&context->buffer[index], &input[i], inputlen - i)
}
void MD5Final(MD5_CTX* context, unsigned char digest[16])
{
unsigned int index = 0, padlen = 0
unsigned char bits[8]
index = (context->count[0] >>3) &0x3F
padlen = (index <56) ? (56 - index) : (120 - index)
MD5Encode(bits, context->count, 8)
MD5Update(context, PADDING, padlen)
MD5Update(context, bits, 8)
MD5Encode(digest, context->state, 16)
}
void MD5Encode(unsigned char* output, unsigned int* input, unsigned int len)
{
unsigned int i = 0, j = 0
while (j <len)
{
output[j] = input[i] &0xFF
output[j + 1] = (input[i] >>8) &0xFF
output[j + 2] = (input[i] >>16) &0xFF
output[j + 3] = (input[i] >>24) &0xFF
i++
j += 4
}
}
void MD5Decode(unsigned int* output, unsigned char* input, unsigned int len)
{
unsigned int i = 0, j = 0
while (j <len)
{
output[i] = (input[j]) |
(input[j + 1] <<8) |
(input[j + 2] <<16) |
(input[j + 3] <<24)
i++
j += 4
}
}
void MD5Transform(unsigned int state[4], unsigned char block[64])
{
unsigned int a = state[0]
unsigned int b = state[1]
unsigned int c = state[2]
unsigned int d = state[3]
unsigned int x[64]
MD5Decode(x, block, 64)
FF(a, b, c, d, x[0], 7, 0xd76aa478)/* 1 */
FF(d, a, b, c, x[1], 12, 0xe8c7b756)/* 2 */
FF(c, d, a, b, x[2], 17, 0x242070db)/* 3 */
FF(b, c, d, a, x[3], 22, 0xc1bdceee)/* 4 */
FF(a, b, c, d, x[4], 7, 0xf57c0faf)/* 5 */
FF(d, a, b, c, x[5], 12, 0x4787c62a)/* 6 */
FF(c, d, a, b, x[6], 17, 0xa8304613)/* 7 */
FF(b, c, d, a, x[7], 22, 0xfd469501)/* 8 */
FF(a, b, c, d, x[8], 7, 0x698098d8)/* 9 */
FF(d, a, b, c, x[9], 12, 0x8b44f7af)/* 10 */
FF(c, d, a, b, x[10], 17, 0xffff5bb1)/* 11 */
FF(b, c, d, a, x[11], 22, 0x895cd7be)/* 12 */
FF(a, b, c, d, x[12], 7, 0x6b901122)/* 13 */
FF(d, a, b, c, x[13], 12, 0xfd987193)/* 14 */
FF(c, d, a, b, x[14], 17, 0xa679438e)/* 15 */
FF(b, c, d, a, x[15], 22, 0x49b40821)/* 16 */
/* Round 2 */
GG(a, b, c, d, x[1], 5, 0xf61e2562)/* 17 */
GG(d, a, b, c, x[6], 9, 0xc040b340)/* 18 */
GG(c, d, a, b, x[11], 14, 0x265e5a51)/* 19 */
GG(b, c, d, a, x[0], 20, 0xe9b6c7aa)/* 20 */
GG(a, b, c, d, x[5], 5, 0xd62f105d)/* 21 */
GG(d, a, b, c, x[10], 9, 0x2441453)/* 22 */
GG(c, d, a, b, x[15], 14, 0xd8a1e681)/* 23 */
GG(b, c, d, a, x[4], 20, 0xe7d3fbc8)/* 24 */
GG(a, b, c, d, x[9], 5, 0x21e1cde6)/* 25 */
GG(d, a, b, c, x[14], 9, 0xc33707d6)/* 26 */
GG(c, d, a, b, x[3], 14, 0xf4d50d87)/* 27 */
GG(b, c, d, a, x[8], 20, 0x455a14ed)/* 28 */
GG(a, b, c, d, x[13], 5, 0xa9e3e905)/* 29 */
GG(d, a, b, c, x[2], 9, 0xfcefa3f8)/* 30 */
GG(c, d, a, b, x[7], 14, 0x676f02d9)/* 31 */
GG(b, c, d, a, x[12], 20, 0x8d2a4c8a)/* 32 */
/* Round 3 */
HH(a, b, c, d, x[5], 4, 0xfffa3942)/* 33 */
HH(d, a, b, c, x[8], 11, 0x8771f681)/* 34 */
HH(c, d, a, b, x[11], 16, 0x6d9d6122)/* 35 */
HH(b, c, d, a, x[14], 23, 0xfde5380c)/* 36 */
HH(a, b, c, d, x[1], 4, 0xa4beea44)/* 37 */
HH(d, a, b, c, x[4], 11, 0x4bdecfa9)/* 38 */
HH(c, d, a, b, x[7], 16, 0xf6bb4b60)/* 39 */
HH(b, c, d, a, x[10], 23, 0xbebfbc70)/* 40 */
HH(a, b, c, d, x[13], 4, 0x289b7ec6)/* 41 */
HH(d, a, b, c, x[0], 11, 0xeaa127fa)/* 42 */
HH(c, d, a, b, x[3], 16, 0xd4ef3085)/* 43 */
HH(b, c, d, a, x[6], 23, 0x4881d05)/* 44 */
HH(a, b, c, d, x[9], 4, 0xd9d4d039)/* 45 */
HH(d, a, b, c, x[12], 11, 0xe6db99e5)/* 46 */
HH(c, d, a, b, x[15], 16, 0x1fa27cf8)/* 47 */
HH(b, c, d, a, x[2], 23, 0xc4ac5665)/* 48 */
/* Round 4 */
II(a, b, c, d, x[0], 6, 0xf4292244)/* 49 */
II(d, a, b, c, x[7], 10, 0x432aff97)/* 50 */
II(c, d, a, b, x[14], 15, 0xab9423a7)/* 51 */
II(b, c, d, a, x[5], 21, 0xfc93a039)/* 52 */
II(a, b, c, d, x[12], 6, 0x655b59c3)/* 53 */
II(d, a, b, c, x[3], 10, 0x8f0ccc92)/* 54 */
II(c, d, a, b, x[10], 15, 0xffeff47d)/* 55 */
II(b, c, d, a, x[1], 21, 0x85845dd1)/* 56 */
II(a, b, c, d, x[8], 6, 0x6fa87e4f)/* 57 */
II(d, a, b, c, x[15], 10, 0xfe2ce6e0)/* 58 */
II(c, d, a, b, x[6], 15, 0xa3014314)/* 59 */
II(b, c, d, a, x[13], 21, 0x4e0811a1)/* 60 */
II(a, b, c, d, x[4], 6, 0xf7537e82)/* 61 */
II(d, a, b, c, x[11], 10, 0xbd3af235)/* 62 */
II(c, d, a, b, x[2], 15, 0x2ad7d2bb)/* 63 */
II(b, c, d, a, x[9], 21, 0xeb86d391)/* 64 */
state[0] += a
state[1] += b
state[2] += c
state[3] += d
}
md5.h
#ifndef MD5_H
#define MD5_H
typedef struct
{
unsigned int count[2]
unsigned int state[4]
unsigned char buffer[64]
}MD5_CTX
#define F(x,y,z) ((x &y) | (~x &z))
#define G(x,y,z) ((x &z) | (y &~z))
#define H(x,y,z) (x^y^z)
#define I(x,y,z) (y ^ (x | ~z))
#define ROTATE_LEFT(x,n) ((x <<n) | (x >>(32-n)))
#define FF(a,b,c,d,x,s,ac) \
{ \
a += F(b,c,d) + x + ac\
a = ROTATE_LEFT(a,s)\
a += b\
}
#define GG(a,b,c,d,x,s,ac) \
{ \
a += G(b,c,d) + x + ac\
a = ROTATE_LEFT(a,s)\
a += b\
}
#define HH(a,b,c,d,x,s,ac) \
{ \
a += H(b,c,d) + x + ac\
a = ROTATE_LEFT(a,s)\
a += b\
}
#define II(a,b,c,d,x,s,ac) \
{ \
a += I(b,c,d) + x + ac\
a = ROTATE_LEFT(a,s)\
a += b\
}
void MD5Init(MD5_CTX* context)
void MD5Update(MD5_CTX* context, unsigned char* input, unsigned int inputlen)
void MD5Final(MD5_CTX* context, unsigned char digest[16])
void MD5Transform(unsigned int state[4], unsigned char block[64])
void MD5Encode(unsigned char* output, unsigned int* input, unsigned int len)
void MD5Decode(unsigned int* output, unsigned char* input, unsigned int len)
#endif
1、主要就是调用库函数，MD5加密说到底也是函数计算，没有什么思路的问题，了解md5的发明算法，本质是一个数学问题。
2、例程：
#ifndef MD5_H#define MD5_H
typedef struct
{
unsigned int count[2]
unsigned int state[4]
unsigned char buffer[64]
}MD5_CTX
#define F(x,y,z) ((x & y) | (~x & z))
#define G(x,y,z) ((x & z) | (y & ~z))
#define H(x,y,z) (x^y^z)
#define I(x,y,z) (y ^ (x | ~z))
#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))
#define FF(a,b,c,d,x,s,ac) \
{ \
a += F(b,c,d) + x + ac \
a = ROTATE_LEFT(a,s) \
a += b \
}
#define GG(a,b,c,d,x,s,ac) \
{ \
a += G(b,c,d) + x + ac \
a = ROTATE_LEFT(a,s) \
a += b \
}
#define HH(a,b,c,d,x,s,ac) \
{ \
a += H(b,c,d) + x + ac \
a = ROTATE_LEFT(a,s) \
a += b \
}
#define II(a,b,c,d,x,s,ac) \
{ \
a += I(b,c,d) + x + ac \
a = ROTATE_LEFT(a,s) \
a += b \
}
void MD5Init(MD5_CTX *context)
void MD5Update(MD5_CTX *context,unsigned char *input,unsigned int inputlen)
void MD5Final(MD5_CTX *context,unsigned char digest[16])
void MD5Transform(unsigned int state[4],unsigned char block[64])
void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len)
void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len)
#endif
源文件md5.c
#include <memory.h>
#include "md5.h"
unsigned char PADDING[]={0x80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
void MD5Init(MD5_CTX *context)
{
context->count[0] = 0
context->count[1] = 0
context->state[0] = 0x67452301
context->state[1] = 0xEFCDAB89
context->state[2] = 0x98BADCFE
context->state[3] = 0x10325476
}
void MD5Update(MD5_CTX *context,unsigned char *input,unsigned int inputlen)
{
unsigned int i = 0,index = 0,partlen = 0
index = (context->count[0] >> 3) & 0x3F
partlen = 64 - index
context->count[0] += inputlen << 3
if(context->count[0] < (inputlen << 3))
context->count[1]++
context->count[1] += inputlen >> 29
if(inputlen >= partlen)
{
memcpy(&context->buffer[index],input,partlen)
MD5Transform(context->state,context->buffer)
for(i = partleni+64 <= inputleni+=64)
MD5Transform(context->state,&input[i])
index = 0
}
else
{
i = 0
}
memcpy(&context->buffer[index],&input[i],inputlen-i)
}
void MD5Final(MD5_CTX *context,unsigned char digest[16])
{
unsigned int index = 0,padlen = 0
unsigned char bits[8]
index = (context->count[0] >> 3) & 0x3F
padlen = (index < 56)?(56-index):(120-index)
MD5Encode(bits,context->count,8)
MD5Update(context,PADDING,padlen)
MD5Update(context,bits,8)
MD5Encode(digest,context->state,16)
}
void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len)
{
unsigned int i = 0,j = 0
while(j < len)
{
output[j] = input[i] & 0xFF
output[j+1] = (input[i] >> 8) & 0xFF
output[j+2] = (input[i] >> 16) & 0xFF
output[j+3] = (input[i] >> 24) & 0xFF
i++
j+=4
}
}
void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len)
{
unsigned int i = 0,j = 0
while(j < len)
{
output[i] = (input[j]) |
(input[j+1] << 8) |
(input[j+2] << 16) |
(input[j+3] << 24)
i++
j+=4
}
}
void MD5Transform(unsigned int state[4],unsigned char block[64])
{
unsigned int a = state[0]
unsigned int b = state[1]
unsigned int c = state[2]
unsigned int d = state[3]
unsigned int x[64]
MD5Decode(x,block,64)
FF(a, b, c, d, x[ 0], 7, 0xd76aa478) /* 1 */
FF(d, a, b, c, x[ 1], 12, 0xe8c7b756) /* 2 */
FF(c, d, a, b, x[ 2], 17, 0x242070db) /* 3 */
FF(b, c, d, a, x[ 3], 22, 0xc1bdceee) /* 4 */
FF(a, b, c, d, x[ 4], 7, 0xf57c0faf) /* 5 */
FF(d, a, b, c, x[ 5], 12, 0x4787c62a) /* 6 */
FF(c, d, a, b, x[ 6], 17, 0xa8304613) /* 7 */
FF(b, c, d, a, x[ 7], 22, 0xfd469501) /* 8 */
FF(a, b, c, d, x[ 8], 7, 0x698098d8) /* 9 */
FF(d, a, b, c, x[ 9], 12, 0x8b44f7af) /* 10 */
FF(c, d, a, b, x[10], 17, 0xffff5bb1) /* 11 */
FF(b, c, d, a, x[11], 22, 0x895cd7be) /* 12 */
FF(a, b, c, d, x[12], 7, 0x6b901122) /* 13 */
FF(d, a, b, c, x[13], 12, 0xfd987193) /* 14 */
FF(c, d, a, b, x[14], 17, 0xa679438e) /* 15 */
FF(b, c, d, a, x[15], 22, 0x49b40821) /* 16 */
怎么发给你？md5.h
//===================================================
#ifndef MD5_H
#define MD5_H
#include <string>
#include <fstream>
/* Type define */
typedef unsigned char byte
typedef unsigned int uint32
using std::string
using std::ifstream
/* MD5 declaration. */
class MD5 {
public:
MD5()
MD5(const void* input, size_t length)
MD5(const string&str)
MD5(ifstream&in)
void update(const void* input, size_t length)
void update(const string&str)
void update(ifstream&in)
const byte* digest()
string toString()
void reset()
private:
void update(const byte* input, size_t length)
void final()
void transform(const byte block[64])
void encode(const uint32* input, byte* output, size_t length)
void decode(const byte* input, uint32* output, size_t length)
string bytesToHexString(const byte* input, size_t length)
/* class uncopyable */
MD5(const MD5&)
MD5&operator=(const MD5&)
private:
uint32 _state[4]/* state (ABCD) */
uint32 _count[2]/* number of bits, modulo 2^64 (low-order word first) */
byte _buffer[64]/* input buffer */
byte _digest[16]/* message digest */
bool _finished /* calculate finished ? */
static const byte PADDING[64]/* padding for calculate */
static const char HEX[16]
enum { BUFFER_SIZE = 1024 }
}
#endif /*MD5_H*/
md5.cpp
//==============================================
#include "md5.h"
using namespace std
/* Constants for MD5Transform routine. */
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) &(y)) | ((~x) &(z)))
#define G(x, y, z) (((x) &(z)) | ((y) &(~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) <<(n)) | ((x) >>(32-(n))))
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + ac\
(a) = ROTATE_LEFT ((a), (s))\
(a) += (b)\
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + ac\
(a) = ROTATE_LEFT ((a), (s))\
(a) += (b)\
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + ac\
(a) = ROTATE_LEFT ((a), (s))\
(a) += (b)\
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + ac\
(a) = ROTATE_LEFT ((a), (s))\
(a) += (b)\
}
const byte MD5::PADDING[64] = { 0x80 }
const char MD5::HEX[16] = {
'0', '1', '2', '3',
'4', '5', '6', '7',
'8', '9', 'a', 'b',
'c', 'd', 'e', 'f'
}
/* Default construct. */
MD5::MD5() {
reset()
}
/* Construct a MD5 object with a input buffer. */
MD5::MD5(const void* input, size_t length) {
reset()
update(input, length)
}
/* Construct a MD5 object with a string. */
MD5::MD5(const string&str) {
reset()
update(str)
}
/* Construct a MD5 object with a file. */
MD5::MD5(ifstream&in) {
reset()
update(in)
}
/* Return the message-digest */
const byte* MD5::digest() {
if (!_finished) {
_finished = true
final()
}
return _digest
}
/* Reset the calculate state */
void MD5::reset() {
_finished = false
/* reset number of bits. */
_count[0] = _count[1] = 0
/* Load magic initialization constants. */
_state[0] = 0x67452301
_state[1] = 0xefcdab89
_state[2] = 0x98badcfe
_state[3] = 0x10325476
}
/* Updating the context with a input buffer. */
void MD5::update(const void* input, size_t length) {
update((const byte*)input, length)
}
/* Updating the context with a string. */
void MD5::update(const string&str) {
update((const byte*)str.c_str(), str.length())
}
/* Updating the context with a file. */
void MD5::update(ifstream&in) {
if (!in) {
return
}
std::streamsize length
char buffer[BUFFER_SIZE]
while (!in.eof()) {
in.read(buffer, BUFFER_SIZE)
length = in.gcount()
if (length >0) {
update(buffer, length)
}
}
in.close()
}
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5::update(const byte* input, size_t length) {
uint32 i, index, partLen
_finished = false
/* Compute number of bytes mod 64 */
index = (uint32)((_count[0] >>3) &0x3f)
/* update number of bits */
if ((_count[0] += ((uint32)length <<3)) <((uint32)length <<3)) {
++_count[1]
}
_count[1] += ((uint32)length >>29)
partLen = 64 - index
/* transform as many times as possible. */
if (length >= partLen) {
memcpy(&_buffer[index], input, partLen)
transform(_buffer)
for (i = partLeni + 63 <lengthi += 64) {
transform(&input[i])
}
index = 0
} else {
i = 0
}
/* Buffer remaining input */
memcpy(&_buffer[index], &input[i], length - i)
}
/* MD5 finalization. Ends an MD5 message-_digest operation, writing the
the message _digest and zeroizing the context.
*/
void MD5::final() {
byte bits[8]
uint32 oldState[4]
uint32 oldCount[2]
uint32 index, padLen
/* Save current state and count. */
memcpy(oldState, _state, 16)
memcpy(oldCount, _count, 8)
/* Save number of bits */
encode(_count, bits, 8)
/* Pad out to 56 mod 64. */
index = (uint32)((_count[0] >>3) &0x3f)
padLen = (index <56) ? (56 - index) : (120 - index)
update(PADDING, padLen)
/* Append length (before padding) */
update(bits, 8)
/* Store state in digest */
encode(_state, _digest, 16)
/* Restore current state and count. */
memcpy(_state, oldState, 16)
memcpy(_count, oldCount, 8)
}
/* MD5 basic transformation. Transforms _state based on block. */
void MD5::transform(const byte block[64]) {
uint32 a = _state[0], b = _state[1], c = _state[2], d = _state[3], x[16]
decode(block, x, 64)
/* Round 1 */
FF (a, b, c, d, x[ 0], S11, 0xd76aa478)/* 1 */
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756)/* 2 */
FF (c, d, a, b, x[ 2], S13, 0x242070db)/* 3 */
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee)/* 4 */
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf)/* 5 */
FF (d, a, b, c, x[ 5], S12, 0x4787c62a)/* 6 */
FF (c, d, a, b, x[ 6], S13, 0xa8304613)/* 7 */
FF (b, c, d, a, x[ 7], S14, 0xfd469501)/* 8 */
FF (a, b, c, d, x[ 8], S11, 0x698098d8)/* 9 */
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af)/* 10 */
FF (c, d, a, b, x[10], S13, 0xffff5bb1)/* 11 */
FF (b, c, d, a, x[11], S14, 0x895cd7be)/* 12 */
FF (a, b, c, d, x[12], S11, 0x6b901122)/* 13 */
FF (d, a, b, c, x[13], S12, 0xfd987193)/* 14 */
FF (c, d, a, b, x[14], S13, 0xa679438e)/* 15 */
FF (b, c, d, a, x[15], S14, 0x49b40821)/* 16 */
/* Round 2 */
GG (a, b, c, d, x[ 1], S21, 0xf61e2562)/* 17 */
GG (d, a, b, c, x[ 6], S22, 0xc040b340)/* 18 */
GG (c, d, a, b, x[11], S23, 0x265e5a51)/* 19 */
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa)/* 20 */
GG (a, b, c, d, x[ 5], S21, 0xd62f105d)/* 21 */
GG (d, a, b, c, x[10], S22, 0x2441453)/* 22 */
GG (c, d, a, b, x[15], S23, 0xd8a1e681)/* 23 */
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8)/* 24 */
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6)/* 25 */
GG (d, a, b, c, x[14], S22, 0xc33707d6)/* 26 */
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87)/* 27 */
GG (b, c, d, a, x[ 8], S24, 0x455a14ed)/* 28 */
GG (a, b, c, d, x[13], S21, 0xa9e3e905)/* 29 */
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8)/* 30 */
GG (c, d, a, b, x[ 7], S23, 0x676f02d9)/* 31 */
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a)/* 32 */
/* Round 3 */
HH (a, b, c, d, x[ 5], S31, 0xfffa3942)/* 33 */
HH (d, a, b, c, x[ 8], S32, 0x8771f681)/* 34 */
HH (c, d, a, b, x[11], S33, 0x6d9d6122)/* 35 */
HH (b, c, d, a, x[14], S34, 0xfde5380c)/* 36 */
HH (a, b, c, d, x[ 1], S31, 0xa4beea44)/* 37 */
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9)/* 38 */
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60)/* 39 */
HH (b, c, d, a, x[10], S34, 0xbebfbc70)/* 40 */
HH (a, b, c, d, x[13], S31, 0x289b7ec6)/* 41 */
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa)/* 42 */
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085)/* 43 */
HH (b, c, d, a, x[ 6], S34, 0x4881d05)/* 44 */
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039)/* 45 */
HH (d, a, b, c, x[12], S32, 0xe6db99e5)/* 46 */
HH (c, d, a, b, x[15], S33, 0x1fa27cf8)/* 47 */
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665)/* 48 */
/* Round 4 */
II (a, b, c, d, x[ 0], S41, 0xf4292244)/* 49 */
II (d, a, b, c, x[ 7], S42, 0x432aff97)/* 50 */
II (c, d, a, b, x[14], S43, 0xab9423a7)/* 51 */
II (b, c, d, a, x[ 5], S44, 0xfc93a039)/* 52 */
II (a, b, c, d, x[12], S41, 0x655b59c3)/* 53 */
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92)/* 54 */
II (c, d, a, b, x[10], S43, 0xffeff47d)/* 55 */
II (b, c, d, a, x[ 1], S44, 0x85845dd1)/* 56 */
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f)/* 57 */
II (d, a, b, c, x[15], S42, 0xfe2ce6e0)/* 58 */
II (c, d, a, b, x[ 6], S43, 0xa3014314)/* 59 */
II (b, c, d, a, x[13], S44, 0x4e0811a1)/* 60 */
II (a, b, c, d, x[ 4], S41, 0xf7537e82)/* 61 */
II (d, a, b, c, x[11], S42, 0xbd3af235)/* 62 */
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb)/* 63 */
II (b, c, d, a, x[ 9], S44, 0xeb86d391)/* 64 */
_state[0] += a
_state[1] += b
_state[2] += c
_state[3] += d
}
/* Encodes input (ulong) into output (byte). Assumes length is
a multiple of 4.
*/
void MD5::encode(const uint32* input, byte* output, size_t length) {
for (size_t i = 0, j = 0j <length++i, j += 4) {
output[j]= (byte)(input[i] &0xff)
output[j + 1] = (byte)((input[i] >>8) &0xff)
output[j + 2] = (byte)((input[i] >>16) &0xff)
output[j + 3] = (byte)((input[i] >>24) &0xff)
}
}
/* Decodes input (byte) into output (ulong). Assumes length is
a multiple of 4.
*/
void MD5::decode(const byte* input, uint32* output, size_t length) {
for (size_t i = 0, j = 0j <length++i, j += 4) {
output[i] = ((uint32)input[j]) | (((uint32)input[j + 1]) <<8) |
(((uint32)input[j + 2]) <<16) | (((uint32)input[j + 3]) <<24)
}
}
/* Convert byte array to hex string. */
string MD5::bytesToHexString(const byte* input, size_t length) {
string str
str.reserve(length <<1)
for (size_t i = 0i <length++i) {
int t = input[i]
int a = t / 16
int b = t % 16
str.append(1, HEX[a])
str.append(1, HEX[b])
}
return str
}
/* Convert digest to string value */
string MD5::toString() {
return bytesToHexString(digest(), 16)
}
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）