1.写一个java类，该类包含了需要调用的本地方法的描述，如：package com.josepublic class Test { public native long method1(String mess); public native long method2(String mess); static { System.loadLibrary("TestImp"); } }其中TestImp.dl文件放在windows安装目录的system32下面，同时设置好classpath(.)注意：一般情况下java类有放在包里和没有包两种情况。2.提示符下使用命令javac -d . Test.java 编译上面写的java文件。此时会生成相应的包的目录结构，并生成Test.class文件。3.提示符下使用命令javah -jni com_jose_Test，此时会在当前目录下生成文件com_jose.Test.h文件，该文件是由包名+类名组成，中间用分隔符(_)隔开。4.使用VC来编写本地方法的实现函数，最后编译成.dll文件①选择new->projects(选择Win32 Dynamic-Link Library，以第一步中指定的库名TestImp作为工程名)->OK->An ampty DLL project->Finish②选择Tools->Options->Directories 添加JNI所需的头文件③将第三步生成的com_jose_test.h文件拷贝到TestImp工程中，并将其添加到TestImp.cpp的头文件中注意事项说明： ㈠我们知道DLL有两种导出函数的方法，一种就是在.def文件中定义，另一种是在定义函数时使用关键字_declspec(dllexport)。而在JNI中函数定义关键字JNIEXPORT实际就在jni_md.h中如下定义：#define JNIEXPORT_declspec(dllexport)可见JNI默认的导出方式为第二种。使用第二种方式产生的导出函数名会根据编译器发生变化，在有的情况下会发生找不到导出函数的问题（我们在JSP中调用JNI的时候就发生这样的问题，后来强加一个.def文件重新导出函数就解决了）。因此最好还是自己定义个.def文件，强制导出的方法比较好点。 ㈡根据本列，写一个TestImp.def文件，如下：LIBRARY "TestImp"DESCRIPTION 'ImageConvertDll Windows Dynamic Link Library'EXPORTS; Explicit exports can go here Java_com_jose_Test_method1Java_com_jose_Test_method2 最后生成dll文件
static { System.loadLibrary("TestImp"); }
}其中TestImp.dl文件放在windows安装目录的system32下面，同时设置好classpath(.)注意：一般情况下java类有放在包里和没有包两种情况。2.提示符下使用命令javac -d . Test.java 编译上面写的java文件。此时会生成相应的包的目录结构，并生成Test.class文件。3.提示符下使用命令javah -jni com_jose_Test，此时会在当前目录下生成文件com_jose.Test.h文件，该文件是由包名+类名组成，中间用分隔符(_)隔开。4.使用VC来编写本地方法的实现函数，最后编译成.dll文件①选择new->projects(选择Win32 Dynamic-Link Library，以第一步中指定的库名TestImp作为工程名)->OK->An ampty DLL project->Finish②选择Tools->Options->Directories 添加JNI所需的头文件③将第三步生成的com_jose_test.h文件拷贝到TestImp工程中，并将其添加到TestImp.cpp的头文件中注意事项说明： ㈠我们知道DLL有两种导出函数的方法，一种就是在.def文件中定义，另一种是在定义函数时使用关键字_declspec(dllexport)。而在JNI中函数定义关键字JNIEXPORT实际就在jni_md.h中如下定义：#define JNIEXPORT_declspec(dllexport)可见JNI默认的导出方式为第二种。使用第二种方式产生的导出函数名会根据编译器发生变化，在有的情况下会发生找不到导出函数的问题（我们在JSP中调用JNI的时候就发生这样的问题，后来强加一个.def文件重新导出函数就解决了）。因此最好还是自己定义个.def文件，强制导出的方法比较好点。 ㈡根据本列，写一个TestImp.def文件，如下：LIBRARY "TestImp"DESCRIPTION 'ImageConvertDll Windows Dynamic Link Library'EXPORTS;
Explicit exports can go here
Java_com_jose_Test_method1Java_com_jose_Test_method2 最后生成dll文件
1:编写 java
public class FileCode { /**
* @param args
*/
public native boolean ecfile(String fileath, String password); public native boolean dcfile(String fileath, String password); static {
System.loadLibrary("FileCode");
} public static void main(String[] args) {
// TODO Auto-generated method stub
FileCode test = new FileCode();
System.out.print(test.ecfile("C:\\temp\\1234.html", "12345"));
//System.out.print(test.dcfile("C:\\temp\\1234.html", "12345"));
}}
2:编译java 文件3: set java_home=C:\Program Files\Java\jdk1.6.0_11
set path=%java_home%\bin
set class_path=%java_home%\lib;%java_home%\lib\dt.jar;%java_home%\lib\tools.jar
javah -jni cn.common.FileCode
@pause(上可做成bat)4:写c++我是用VC++做的
头文件:
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: cn_common_FileCode
* Method: ecfile
* Signature: (Ljava/lang/String;Ljava/lang/String;)Z
*/
JNIEXPORT jboolean JNICALL Java_cn_common_FileCode_ecfile
(JNIEnv *, jobject, jstring, jstring);/*
* Class: cn_common_FileCode
* Method: dcfile
* Signature: (Ljava/lang/String;Ljava/lang/String;)Z
*/
JNIEXPORT jboolean JNICALL Java_cn_common_FileCode_dcfile
(JNIEnv *, jobject, jstring, jstring);bool fiedecode(char * filepath,char * filecod);__int64 epass(char *password);
__int64 m_password;
char* jstringToWindows( JNIEnv* env, jstring jstr ) ;
#ifdef __cplusplus
}
#endif
#endif
5:CPP文件
#include "FileCode.h"
#include <stdlib.h>
#include <stdio.h>#include "stdafx.h"/*
* Class: cn_common_FileCode
* Method: ecfile
* Signature: (Ljava/lang/String;Ljava/lang/String;)Z
*/
JNIEXPORT jboolean JNICALL Java_cn_common_FileCode_ecfile
(JNIEnv *ev, jobject obj, jstring filepath, jstring password){
char *data;
CFile *file;
DWORD flen;
__int64 m_password;
m_password = epass(jstringToWindows(ev,password)); LPCTSTR fpath = jstringToWindows(ev,filepath);
file = new CFile;
if ( !file->Open(fpath, CFile::shareDenyNone|CFile::modeReadWrite))
{
return FALSE;
} flen = file->GetLength();
data = new char[(int)flen]; file->SeekToBegin();
file->Read(data, flen); for(int i=0; i<(int)flen; i++)
{
data[i] ^= m_password;
data[i] ^= flen;
} file->SeekToBegin();
file->Write(data, flen);
delete[] data; //添加密码验证信息
char cpass[5] = "love";
for(int j=0; j<5; j++)
{
cpass[j] ^= m_password;
}
file->SeekToEnd();
file->Write(&cpass, 5);
file->Close();
delete file; return TRUE;
}
/*
* Class: cn_common_FileCode
* Method: dcfile
* Signature: (Ljava/lang/String;Ljava/lang/String;)Z
*/
JNIEXPORT jboolean JNICALL Java_cn_common_FileCode_dcfile
(JNIEnv *ev, jobject obj, jstring filepath, jstring password){
char *data;
CFile *file;
DWORD flen;
char love[5];
LPCTSTR fpath = jstringToWindows(ev,filepath);
file = new CFile;
if( !file->Open(fpath, CFile::shareDenyNone|CFile::modeReadWrite))
{
return FALSE;
} flen = file->GetLength();
data = new char[(int)flen]; file->Seek(-5, CFile::end);
file->Read(&love, 5); m_password = epass(jstringToWindows(ev,password));
for(int i=0; i<5; i++)
{
love[i] ^= m_password;
} if(strcmp(love, "love")!=0)
{
return FALSE;
} file->SeekToBegin();
file->Read(data, flen); for(int j=0; j<(int)flen; j++)
{
data[j] ^= m_password;
data[j] ^= (flen-5);
}
file->SeekToBegin();
file->Write(data, flen);
file->SetLength(flen-5);
file->Close(); delete[] data;
delete file;
return TRUE;
}__int64 epass(char *password)
{
DWORD plen;
char *ppass;
__int64 mc= 8757735233305;
ppass = password; plen = strlen(ppass); for(int i=0; i<(int)plen; i++)
{
mc ^= ppass[i]|128;
}
return mc;
}
char* jstringToWindows( JNIEnv* env, jstring jstr )
{
int length = env->GetStringLength(jstr);
const jchar* jcstr = env->GetStringChars( jstr, 0 );
char* rtn = (char*)malloc( length*2+1 );
int size = 0;
size = WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)jcstr, length, rtn,
(length*2+1), NULL, NULL );
if( size <= 0 )
return NULL;
env->ReleaseStringChars( jstr, jcstr );
rtn[size] = 0;
return rtn;
}
#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
#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。