c++写的des加密dll程序,知道如何实现吗？

java调用COM能成吗？
java调用动态链接库好一点吧。

帮忙啊如何写成com控件啊？
能实现就行。

include一个des的类，然后做一个接口调用就可以了

谢谢楼上各位，我找了一个VC++的Des加密类，但不知在编译成dll时，由于小弟对c++不太熟悉，怎么写提供给java调用的接口？哪位兄弟知道的帮忙写下。 DES类的头文件如下：（DES.H）
#ifndef _DES_H
#define _DES_H
class CDES {
public:
    BYTE bOriMsg[8] ;              // 初始消息 ( 64 bit )
    BYTE LMsg[17][4], RMsg[17][4] ; // 中间变量L0-->L16,R0-->R16 ( 32 bit )
    BYTE bKey[8] ;                  // 保存密钥 ( 64 bit )
    BYTE bSubKey[17][6] ;          // 保存子密钥K1-->K16 ( 48 bit )
    BYTE bCryptedMsg[8] ;          // 密文
public:
    void DES_Encrypt ( ) ;
    void DES_Decrypt ( ) ;
    BOOL DES_Encrypt ( LPBYTE lpSour, LPBYTE lpDest, UINT uLen, LPBYTE lpKey ) ;
    BOOL DES_Decrypt ( LPBYTE lpSour, LPBYTE lpDest, UINT uLen, LPBYTE lpKey ) ;
public:
    // 初始置换
    void DESInitSwap ( ) ;
    // 初始逆置换
    void DESInitReSwap () ;
    // 产生子密钥
    void DESGenSubKey ( ) ;
    // DES的单轮加密过程
    void DESSingleTurn ( BYTE nTurnIndex, BOOL bMode ) ;
    // DES的F函数
    void DES_f ( BYTE bTurnIndex, BOOL bMode ) ;
public:
    // 初始化
    void DES_SysInit () ;
    // 设置明文
    void DES_SetOriMsg ( PBYTE pMsg, UINT uLen ) ;
    // 设置密钥
    void DES_SetKey ( PBYTE pKey, UINT uLen ) ;
} ;
#endif

实现文件如下：（DES.CPP） view plaincopy to clipboardprint?
#include "stdafx.h"
#include "des.h"
// 初始置换表 (IP)
static BYTE bInitSwapTable[64] = {
    58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
    62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
    57, 49, 41, 33, 25, 17, 9,  1, 59, 51, 43, 35, 27, 19, 11, 3,
    61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
} ;
// 初始逆置换表 (IP-1)
static BYTE bInitReSwapTable[64] = {
    40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,
    38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,
    36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,
    34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41,  9, 49, 17, 57, 25
} ;
// 位扩展表32-->48 (E)
static BYTE bBitExternTable[48] = {
    32,  1,  2,  3,  4,  5,  4,  5,  6,  7,  8,  9,
    8,  9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
    16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
    24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32,  1
} ;
// 32位置换表--用于F的尾置换 (P)
static BYTE bTailSwapTable[32] = {
    16,  7, 20, 21, 29, 12, 28, 17,
    1, 15, 23, 26,  5, 18, 31, 10,
    2,  8, 24, 14, 32, 27,  3,  9,
    19, 13, 30,  6, 22, 11,  4, 25
} ;
// 8个S盒 (S)
static BYTE SB[8][4][16] = {
    {
        14, 4, 13, 1, 1, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
        0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
        4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
        15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
    },

    {
        15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
        3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
        0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
        13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
    },

    {
        10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
        13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
        13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
        1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
    },

    {
        7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
        13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
        10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
        3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
    },

    {
        2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
        14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
        4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
        11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
    },

    {
        12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
        10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
        9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
        4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
    },

    {
        4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
        13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
        1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
        6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
    },

    {
        13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 13, 14, 5, 0, 12, 7,
        1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
        7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
        2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
    }
} ;
// 置换选择表一 (PC-1)
static BYTE bSelSwapTable_1[56] = {
    57, 49, 41, 33, 25, 17,  9,  1, 58, 50, 42, 34, 26, 18,
    10,  2, 59, 51, 43, 35, 27, 19, 11,  3, 60, 52, 44, 36,
    63, 55, 47, 39, 31, 23, 15,  7, 62, 54, 46, 38, 30, 22,
    14,  6, 61, 53, 45, 37, 29, 21, 13,  5, 28, 20, 12,  4
} ;
// 置换选择表二 (PC-2)
static BYTE bSelSwapTable_2[48] = {
    14, 17, 11, 24,  1,  5,  3, 28, 15,  6, 21, 10,
    23, 19, 12,  4, 26,  8, 16,  7, 27, 20, 13,  2,
    41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
    44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
} ;
// 位掩码表
static BYTE bBitMask[8] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 } ;
//
// DES加密
//
void CDES::DES_Encrypt ( )
{
    this->DES_SysInit() ;
    this->DESGenSubKey () ;
    this->DESInitSwap () ;
    for ( BYTE i = 1; i <= 16; i++ )
        this->DESSingleTurn ( i, true ) ;
    this->DESInitReSwap () ;
}
//
// DES解密
//
void CDES::DES_Decrypt ( )
{
    this->DES_SysInit() ;
    this->DESGenSubKey () ;
    this->DESInitSwap () ;
    for ( BYTE i = 1; i <= 16; i++ )
        this->DESSingleTurn ( i, false ) ;
    this->DESInitReSwap () ;
}
//
// DES加密
//
BOOL CDES::DES_Encrypt ( LPBYTE lpSour, LPBYTE lpDest, UINT uLen, LPBYTE lpKey )
{
    if ( ( uLen & 7 ) > 0 )
        return FALSE ;
    memset ( this->bKey, 0, sizeof(this->bKey) ) ;
    memcpy ( this->bKey, lpKey, 8 ) ;
    this->DESGenSubKey () ;
    UINT nCurLen ;
    for ( nCurLen = 0; nCurLen < uLen; nCurLen += 8 )
    {
        memset ( this->bOriMsg, 0, sizeof(this->bOriMsg) ) ;
        memcpy ( this->bOriMsg, &(lpSour[nCurLen]), 8 ) ;
        this->DESInitSwap () ;
        for ( BYTE i = 1; i <= 16; i++ )
            this->DESSingleTurn ( i, true ) ;
        this->DESInitReSwap () ;
        memcpy ( &(lpDest[nCurLen]), this->bCryptedMsg, 8 ) ;
        this->DES_SysInit() ;
    }
    return TRUE ;
}
//
// DES解密
//
BOOL CDES::DES_Decrypt  ( LPBYTE lpSour, LPBYTE lpDest, UINT uLen, LPBYTE lpKey )
{
    if ( ( uLen & 7 ) > 0 )
        return FALSE ;
    memset ( this->bKey, 0, sizeof(this->bKey) ) ;
    memcpy ( this->bKey, lpKey, 8 ) ;
    this->DESGenSubKey () ;
    UINT nCurLen ;
    for ( nCurLen = 0; nCurLen < uLen; nCurLen += 8 )
    {
        memset ( this->bOriMsg, 0, sizeof(this->bOriMsg) ) ;
        memcpy ( this->bOriMsg, &(lpSour[nCurLen]), 8 ) ;
        this->DESInitSwap () ;
        for ( BYTE i = 1; i <= 16; i++ )
            this->DESSingleTurn ( i, false ) ;
        this->DESInitReSwap () ;
        memcpy ( &(lpDest[nCurLen]), this->bCryptedMsg, 8 ) ;
        this->DES_SysInit() ;
    }
    return TRUE ;
}
//
// 初始置换
//
void CDES::DESInitSwap ( )
{
    // R[16]-L[16] 构成64位，经初始逆置换
    for ( UINT i = 0; i < 32; i++ )
    {
        if ( bOriMsg[(bInitSwapTable[i]-1)>>3] & bBitMask[(~(bInitSwapTable[i]-1))&7] )
            this->LMsg[0][i>>3] |= bBitMask[(~i)&7] ;
        else
            this->LMsg[0][i>>3] &= ( ~(bBitMask[(~i)&7]) );
        if ( bOriMsg[(bInitSwapTable[i+32]-1)>>3] & bBitMask[(~(bInitSwapTable[i+32]-1))&7] )
            this->RMsg[0][i>>3] |= bBitMask[(~i)&7] ;
        else
            this->RMsg[0][i>>3] &= ( ~(bBitMask[(~i)&7]) );
    }
}
//
// 初始逆置换
//
void CDES::DESInitReSwap ()
{
    // R[16]-L[16] 构成64位，经初始逆置换
    for ( UINT i = 0; i < 64; i++ )
    {
        if ( bInitReSwapTable[i] <= 32 )
        {
            if ( RMsg[16][(bInitReSwapTable[i]-1)>>3] & bBitMask[(~(bInitReSwapTable[i]-1))&7] )
                this->bCryptedMsg[i>>3] |= bBitMask[(~i)&7] ;
            else
                this->bCryptedMsg[i>>3] &= ( ~(bBitMask[(~i)&7]) ) ;
        }
        else
        {
            if ( LMsg[16][(bInitReSwapTable[i]-32-1)>>3] & bBitMask[(~(bInitReSwapTable[i]-32-1))&7] )
                this->bCryptedMsg[i>>3] |= bBitMask[(~i)&7] ;
            else
                this->bCryptedMsg[i>>3] &= ( ~(bBitMask[(~i)&7]) ) ;
        }
    }
}
//
// 产生子密钥
//
void CDES::DESGenSubKey ( )
{
    memset ( this->bSubKey, 0, sizeof(this->bSubKey) ) ;
    // 置换选择一
    UINT i ;
    BYTE bByteIndex, bBitIndex, bTemp[7] = {0} ;
    for ( i = 0; i < 56; i++ )
    {
        bByteIndex  = ( bSelSwapTable_1[i] - 1 ) / 8 ;
        bBitIndex  = 7 - ( bSelSwapTable_1[i] - 1 ) % 8 ;
        if ( this->bKey[bByteIndex] & bBitMask[bBitIndex] )
            bTemp[i>>3] |= bBitMask[(~i)&7] ;
    }
    // 产生子密钥过程
    BYTE bTempKey[7] = {0} ;
    for ( UINT uTurn = 1; uTurn <= 16; uTurn ++ )
    {
        UINT bShiftBit = 2 ;
        if ( uTurn == 1 || uTurn == 2 || uTurn == 9 || uTurn == 16 )
            bShiftBit = 1 ;
        // 循环移位
        for ( i = bShiftBit; i < (28+bShiftBit); i++ )
        {
            if ( bTemp[(i%28)>>3] & bBitMask[(~(i%28))&7] )
                bTempKey[(i-bShiftBit)>>3] |= bBitMask[(~(i-bShiftBit))&7] ;
            if ( bTemp[(i%28+28)>>3] & bBitMask[(~(i%28+28))&7] )
                bTempKey[(i+28-bShiftBit)>>3] |= bBitMask[(~(i+28-bShiftBit))&7] ;
        }
        // 置换选择二
        for ( i = 0; i < 48; i++ )
        {
            bByteIndex  = ( bSelSwapTable_2[i] - 1 ) / 8 ;
            bBitIndex  = 7 - ( bSelSwapTable_2[i] - 1 ) % 8 ;
            if ( bTempKey[bByteIndex] & bBitMask[bBitIndex] )
                this->bSubKey[uTurn][i>>3] |= bBitMask[(~i)&7] ;
        }
        //cout < < "turn " < < uTurn < < "\t :  " ;
        //this->Output ( bTempKey, 7 ) ;
        memcpy ( bTemp, bTempKey, 7 ) ;
        memset ( bTempKey, 0, sizeof(bTempKey) ) ;
    }
}

//
// DES的单轮加密过程
//
void CDES::DESSingleTurn ( BYTE nTurnIndex, BOOL bMode )
{
    // L[n] = R[n-1]
    for ( UINT i = 0; i < 4; i++ )
        LMsg[nTurnIndex][i] = RMsg[nTurnIndex-1][i] ;

    // DES的F函数，（内部处理：R[n] = F( R[n-1], k[n] )）
    this->DES_f ( nTurnIndex, bMode ) ;

    // R[n] = L[n-1] xor F( R[n-1], k[n] ) ;
    for ( UINT i = 0; i < 4; i++ )
        RMsg[nTurnIndex][i] ^= LMsg[nTurnIndex-1][i] ;
}
//
// DES的F函数
//
void CDES::DES_f ( BYTE bTurnIndex, BOOL bMode )
{
    PBYTE  R = RMsg[bTurnIndex-1] ;
    BYTE    bTemp[6] = {0} ;
    BYTE    C[4] = {0} ;

    // 扩展 R --> E(R)，结果保存在bTemp
    for ( BYTE i = 0; i < 48; i++ )
    {
        if ( R[(bBitExternTable[i]-1)>>3] & bBitMask[(~(bBitExternTable[i]-1))&7] )
            bTemp[i>>3] |= bBitMask[(~i)&7] ;
        else
            bTemp[i>>3] &= ( ~(bBitMask[(~i)&7]) );
    }

    // E(R) xor K，结果保存在bTemp
    for ( BYTE i = 0; i < 6; i++ )
    {
        if ( bMode )
            bTemp[i] ^= this->bSubKey[bTurnIndex][i] ;
        else
            bTemp[i] ^= this->bSubKey[17-bTurnIndex][i] ;
    }

    BYTE bStartPos = 0, bTarPos = 0, bTarValue ;
    BYTE bRowIndex = 0, bColIndex = 0 ;
    for ( BYTE bBoxIndex = 0; bBoxIndex < 8; bBoxIndex ++ )
    {
        // 确定行值
        if ( bTemp[bStartPos>>3] & bBitMask[(~bStartPos)&7] )
            bColIndex += 2 ;
        if ( bTemp[(bStartPos+5)>>3] & bBitMask[(~(bStartPos+5))&7] )
            bColIndex += 1 ;

        // 确定列值
        if ( bTemp[(bStartPos+1)>>3] & bBitMask[(~(bStartPos+1))&7] )
            bRowIndex += 8 ;
        if ( bTemp[(bStartPos+2)>>3] & bBitMask[(~(bStartPos+2))&7] )
            bRowIndex += 4 ;
        if ( bTemp[(bStartPos+3)>>3] & bBitMask[(~(bStartPos+3))&7] )
            bRowIndex += 2 ;
        if ( bTemp[(bStartPos+4)>>3] & bBitMask[(~(bStartPos+4))&7] )
            bRowIndex += 1 ;

        // 在S(i)盒中由上面行列所对应的值bTarValue
        bTarValue = SB[bBoxIndex][bColIndex][bRowIndex] ;

        // 把bTarValue转化成对应的C(i)
        if ( bTarValue >= 8 )
        {
            C[bTarPos>>3] |= bBitMask[(~bTarPos)&7] ;
            bTarValue -= 8 ;
        }
        if ( bTarValue >= 4 )
        {
            C[(bTarPos+1)>>3] |= bBitMask[(~(bTarPos+1))&7] ;
            bTarValue -= 4 ;
        }
        if ( bTarValue >= 2 )
        {
            C[(bTarPos+2)>>3] |= bBitMask[(~(bTarPos+2))&7] ;
            bTarValue -= 2 ;
        }
        if ( bTarValue >= 1 )
        {
            C[(bTarPos+3)>>3] |= bBitMask[(~(bTarPos+3))&7] ;
            bTarValue -= 1 ;
        }

        bRowIndex  = bColIndex = 0 ;
        bStartPos  += 6 ;
        bTarPos    += 4 ;
    }

    // 尾置换
    for ( BYTE i = 0; i < 32; i++ )
    {
        if ( C[(bTailSwapTable[i]-1)>>3] & bBitMask[(~(bTailSwapTable[i]-1))&7] )
            this->RMsg[bTurnIndex][i>>3] |= bBitMask[(~i)&7] ;
        else
            this->RMsg[bTurnIndex][i>>3] &= ( ~(bBitMask[(~i)&7]) );
    }
}
void CDES::DES_SysInit ()
{
    memset ( LMsg,      0, sizeof(LMsg) ) ;
    memset ( RMsg,      0, sizeof(RMsg) ) ;
    memset ( bSubKey,  0, sizeof(bSubKey) ) ;
    memset ( bCryptedMsg,  0, sizeof(bCryptedMsg) ) ;
}
void CDES::DES_SetOriMsg ( PBYTE pMsg, UINT uLen )
{
    memset ( this->bOriMsg, 0, sizeof(this->bOriMsg) ) ;
    memcpy ( this->bOriMsg, pMsg, uLen ) ;
}
void CDES::DES_SetKey ( PBYTE pKey, UINT uLen )
{
    memset ( this->bKey, 0, sizeof(this->bKey) ) ;
    memcpy ( this->bKey, pKey, uLen ) ;
}  小弟对c++不太熟悉，不知怎么写提供给java调用的接口？哪位兄弟知道的帮忙写下。

看看《VC6技术内幕》，里面有一张专门将dll的，可以轻松实现你的要求。

DLL 跟C++没关系，只是导出接口而已，JAVA用JNI调用DLL注意DLL接口的里参数类型就好了
具体的步骤网上很多，google baidu搜
java 调用 dll

extern "C" _declspec(dllexport) BOOL Encry(var1, var2...)
{
CDES m_Des
return m_Des.DES_Encrypt(var1, var2,...);}

调试易

c++写的des加密dll程序,知道如何实现吗？

解决方案 »