md5加密算法

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.cpp文件

#include "stdafx.h"#include "MD5Crypt.h"#ifdef _DEBUG#undef THIS_FILEstatic char THIS_FILE[]=__FILE__;#define new DEBUG_NEW#endif#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) + (UINT)(ac); \    (a) = ROTATE_LEFT ((a), (s)); \    (a) += (b); \    }#define GG(a, b, c, d, x, s, ac) { \    (a) += G ((b), (c), (d)) + (x) + (UINT)(ac); \    (a) = ROTATE_LEFT ((a), (s)); \    (a) += (b); \    }#define HH(a, b, c, d, x, s, ac) { \    (a) += H ((b), (c), (d)) + (x) + (UINT)(ac); \    (a) = ROTATE_LEFT ((a), (s)); \    (a) += (b); \    }#define II(a, b, c, d, x, s, ac) { \    (a) += I ((b), (c), (d)) + (x) + (UINT)(ac); \    (a) = ROTATE_LEFT ((a), (s)); \    (a) += (b); \    }//////////////////////////////////////////////////////////////////////// Construction/Destruction//////////////////////////////////////////////////////////////////////CMD5Crypt::CMD5Crypt(){    context=new MD5_CTX;}CMD5Crypt::~CMD5Crypt(){    if (context)    {        delete context;    }}void CMD5Crypt::GetMd5String(CString &strMD5, char *input, int inputlen){    unsigned char digest[16];        Init();    Update((unsigned char*)input,(unsigned int)inputlen);    Final((unsigned char*)digest);        CString strTemp;    for(int i=0;i<16;i++)    {        strTemp.Format("%02x",digest[i]);        strMD5+=strTemp;    }}VOID CMD5Crypt::GetMd5String(CString &strMD5, CString strInput){    int len;    len=strInput.GetLength();    GetMd5String(strMD5,strInput.GetBuffer(len),len);}VOID CMD5Crypt::Init(){    context->count[0] = context->count[1] = 0;    /* Load magic initialization constants.    */    context->state[0] = 0x67452301;    context->state[1] = 0xefcdab89;    context->state[2] = 0x98badcfe;    context->state[3] = 0x10325476;}VOID CMD5Crypt::Update(unsigned char *input, unsigned int inputLen){    unsigned int i, index, partLen;        /* Compute number of bytes mod 64 */    index = (unsigned int)((context->count[0] >> 3) & 0x3F);        /* Update number of bits */    if ((context->count[0] += ((UINT)inputLen << 3))        < ((UINT)inputLen << 3))    {        context->count[1]++;    }    context->count[1] += ((UINT)inputLen >> 29);        partLen = 64 - index;        /* Transform as many times as possible. */    if (inputLen >= partLen)     {        memcpy(&context->buffer[index], input, partLen);        MD5Transform (context->state, context->buffer);                for (i = partLen; i + 63 < inputLen; i += 64)        {            MD5Transform (context->state, &input[i]);        }                index = 0;    }    else    {        i = 0;    }        /* Buffer remaining input */    memcpy(&context->buffer[index], &input[i],inputLen-i);}VOID CMD5Crypt::Final(UCHAR digest[16]){    static unsigned char PADDING[64] = {        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    };    unsigned char bits[8];    unsigned int index, padLen;        /* Save number of bits */    Encode (bits, context->count, 8);        /* Pad out to 56 mod 64.    */    index = (unsigned int)((context->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 (digest, context->state, 16);        /* Zeroize sensitive information.    */    memset (context, 0, sizeof (*context));}////////////////////////////////////////////////////////////////////////////private:VOID CMD5Crypt::MD5Transform(UINT state[4],UCHAR block[64]){    UINT a = state[0], b = state[1], c = state[2], d = state[3], x[16];        Decode (x, block, 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;        /* Zeroize sensitive information.    */    memset (x, 0, sizeof (x));}VOID CMD5Crypt::Encode(UCHAR *output,UINT *input,UINT len){    unsigned int i, j;        for (i = 0, j = 0; j < len; i++, j += 4)     {        output[j] = (unsigned char)(input[i] & 0xff);        output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);        output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);        output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);    }}VOID CMD5Crypt::Decode(UINT *output,UCHAR *input,UINT len){    unsigned int i, j;        for (i = 0, j = 0; j < len; i++, j += 4)    {        output[i] = ((UINT)input[j]) | (((UINT)input[j+1]) << 8) |        (((UINT)input[j+2]) << 16) | (((UINT)input[j+3]) << 24);    }}

.h文件

#if !defined(AFX_MD5CRYPT_H__8D1E322D_1EF6_4954_A9CF_BAD85BDD1E90__INCLUDED_)#define AFX_MD5CRYPT_H__8D1E322D_1EF6_4954_A9CF_BAD85BDD1E90__INCLUDED_#include "StdAfx.h"#if _MSC_VER > 1000#pragma once#endif class CMD5Crypt  {private:    typedef struct {        UINT  state[4];               UINT  count[2];                UCHAR buffer[64];          }MD5_CTX;    MD5_CTX *context;public:    CMD5Crypt();    virtual ~CMD5Crypt();        void Init(void);    void Update(unsigned char *input, unsigned int inputLen);    void Final(unsigned char digest[16]);        VOID GetMd5String(OUT CString &strMD5,IN char *input,IN int inputlen);    VOID GetMd5String(OUT CString &strMD5,IN CString strInput);private: VOID Encode(unsigned char *output,unsigned int *input,unsigned int len); VOID Decode(unsigned int *output,unsigned char *input,unsigned int len); VOID MD5Transform(unsigned int state[4],unsigned char block[64]);};#endif

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