.cpp檔案

#include "stdafx.h"
#include "MD5Crypt.h"

#ifdef _DEBUG
#undef THIS_FILE
static 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);
    }
}
 

#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