📄 des_filedlg.cpp
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// DES_FILEDlg.cpp : implementation file
//
#include "stdafx.h"
#include "DES_FILE.h"
#include "DES_FILEDlg.h"
#include <stdio.h>
#include <string.h>
#include <math.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDES_FILEDlg dialog
CDES_FILEDlg::CDES_FILEDlg(CWnd* pParent /*=NULL*/)
: CDialog(CDES_FILEDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CDES_FILEDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CDES_FILEDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CDES_FILEDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CDES_FILEDlg, CDialog)
//{{AFX_MSG_MAP(CDES_FILEDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDES_FILEDlg message handlers
BOOL CDES_FILEDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
return TRUE; // return TRUE unless you set the focus to a control
}
void CDES_FILEDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CDES_FILEDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}
// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CDES_FILEDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
/* ================================================================
64位(8字节)数据加解密处理子函数
source --输入64位的位置指针（加密为明文，解密则是密文）
des_t --输出64位的位置指针
inkey --密钥
flg --标志 1为加密 0为解密
================================================================ */
void des_64(unsigned char *source,unsigned char * des_t,unsigned char * inkey, unsigned int flg)
{
unsigned char
buffer[64], //存输入数据
bufout[64], //存输出数据
kwork[56], //存56位数据
worka[48], //48位数据
key[64], //存64位密钥
kn[48], //存48位子密钥
nbrofshift, temp1, temp2; //移位临时变量
int valindex; //s盒参数
register i, j, k, iter; //循环计数变量
//初始换位表
const static char IP_Table[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
};
//逆初始换位表
const static char AIP_Table[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
};
/* S盒*/
static unsigned char s[8][4][16] =
{
14, 4, 13, 1, 2, 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, 3, 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1表 */
static unsigned char PC_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2表 */
static unsigned char PC_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,
};
/* 循环左移表 */
static unsigned char shift[16] =
{
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
/* 二进制码表 */
static unsigned char binary[64] =
{
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1,
0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1,
1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1,
1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1
};
/* P置换表 */
static unsigned char P[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
};
/* 处理密钥，将其转换为64位二进制 */
for (i=0;i<8;i++)
for(k=0,j=*(inkey+i);k<8;k++)
key[8*i+k] = (int)(j/pow(2,7-k)) % 2;
/* 处理明文，变为64位二进制*/
for (i=0;i<8;i++)
for(k=0,j=*(source+i);k<8;k++)
buffer[8*i+k] = (int)(j/pow(2,7-k)) % 2;
/* 初始转换IP */
for (i=0;i<64;i++)
bufout[i]=buffer[IP_Table[i]-1];
/* 置换选择1 将64位密钥变换成56位*/
for (i=0;i<56;i++)
kwork[i]=key[PC_1[i]-1];
/*乘积变换*/
for (iter=1;iter<17;iter++)
{ for (i=0;i<32;i++) //设为左右两组数据，buffer为右
buffer[i]=bufout[32+i];
for (i=0,j=7;i<8;i++,j++) //扩展置换(E)
worka[i*6]=buffer[(j*4+3)%32]; //左边扩展位赋值
for (i=0,j=0;i<8;i++,j++)
worka[i*6+5] = buffer[(j*4+4)%32]; //右边扩展位赋值
for (i=0,j=0;i<8;i++)
for (k=1;k<5;k++,j++)
worka[i*6+k] = buffer[j]; //中间4位赋值
//C、D循环左移
if (flg) //加密过程
{ nbrofshift=shift[iter-1]; //从循环左移表中查找移位左移位数
for (i=0;i<(int)nbrofshift;i++)
{ temp1=kwork[0];
temp2=kwork[28];
for (j=0;j<27;j++)
{ kwork[j]=kwork[j+1];
kwork[j+28]=kwork[j+29];
}
kwork[27]=temp1;
kwork[55]=temp2;
}
}
else if (iter>1) //解密过程，与加密过程相反
{ nbrofshift=shift[17-iter];
for (i=0;i<(int)nbrofshift;i++)
{ temp1=kwork[27];
temp2=kwork[55];
for (j=27;j>0;j--)
{ kwork[j]=kwork[j-1];
kwork[j+28]=kwork[j+27];
}
kwork[0]=temp1;
kwork[28]=temp2;
}
}
for (i=0;i<48;i++) //置换选择2 产生出48位子密钥
kn[i]=kwork[PC_2[i]-1];
for (i=0;i<48;i++) //扩展置换与密钥按位异或(48位)
worka[i]=worka[i]^kn[i];
for (i=0,j=0;i<8;i++) //选择S盒
{ valindex=s[i][2*worka[i*6]+worka[i*6+5]][2*(2*(2*worka[i*6+1]+worka[i*6+2])+worka[i*6+3])+worka[i*6+4]];
valindex=valindex*4; //用于查4位二进制表
for(k=0;k<4;k++,j++)
kn[j]=binary[k+valindex];
}
for (i=0;i<32;i++) //P－盒置换
worka[i]=kn[P[i]-1];
for (i=0;i<32;i++)
{ bufout[i+32]=bufout[i]^worka[i]; //R为上一轮L与上一轮R变换后异或得到
bufout[i]=buffer[i]; //L为上一轮的R
}
}
for (i=0;i<32;i++)
{ j=bufout[i];
bufout[i]=bufout[32+i];
bufout[32+i]=j;
}
/* 逆初始转换*/
for (i=0;i<64;i++)
buffer[i]=bufout[AIP_Table[i]-1];
/* 将64位的密文转换成8字节的数据输出 */
j=0;
for(i=0;i<8;i++)
{ *(des_t+i)=0x00; //初始化输出区字节为0
for (k=0;k<7;k++)
*(des_t+i)=((*(des_t+i))+buffer[j+k])*2;
*(des_t+i)=*(des_t+i)+buffer[j+7];
j+=8; //加权累加将8位二进制转换为1个字节的数据
}
}
/* ================================================================
文件加/解密主函数
说明：可以分别独立的对文件进行加/解密
================================================================ */
void CDES_FILEDlg::OnOK()
{
FILE *fp1,*fp2;
register i=0,j=0;
unsigned char buf[9];
int type=0,len=0;
CString filename1,filename2,keystr; //输入文件filename1,输出文件filename2,密钥keystr;
char ch,c;
unsigned char key[9]; //密钥keystr存储区
memset(key, 0, sizeof(key)); //密钥和缓冲区清0
memset(buf, 0, sizeof(buf));
GetDlgItem(IDC_EDIT1)->GetWindowText(filename1); //接受输入文件filename1
GetDlgItem(IDC_EDIT2)->GetWindowText(filename2); //接受输出文件filename2
GetDlgItem(IDC_EDIT3)->GetWindowText(keystr); //接受密钥keystr
for(int n=0;n<keystr.GetLength();n++)
{
key[n]=keystr[n]; //存储密钥keystr
}
type=((CButton *)GetDlgItem(IDC_RADIO1))->GetCheck();
if((fp1=fopen(filename1,"r"))==NULL) //(需要加/解密的文件)
{ printf("source file open error!\n");
exit(0);
}
if((fp2=fopen(filename2,"w+"))==NULL) //(加/解密之后的文件)
{ printf("new file open error!\n");
exit(0);
}
if(type==1) //type=1为加密
{ while((ch=fgetc(fp1))!=EOF)
{ buf[i++]=ch;
if(i==8) //每读8个字符送入des_64进行加密
{ des_64(buf,buf,key,type);
for(i=0;i<8;i++)
fprintf(fp2,"%02x",buf[i]); //按16进制码存入文件
i=0;
}
}
if(i!=0) //处理最后一组8字节数据
{ buf[i]='\0'; //明文末尾加'\0'，保证解密正确完成
des_64(buf,buf,key,type);
for(i=0;i<8;i++)
fprintf(fp2,"%02x",buf[i]);
}
}
else //type=0为解密
{ fseek(fp1,0L,SEEK_END);
len=ftell(fp1); //得到文件长度
rewind(fp1); //文件指针返回文件头部
for(buf[8]='\0';j<len;) //用文件长度判断文件是否读完
{ fscanf(fp1,"%01x",&ch); //(因为按16进制读文件，识别不了EOF结束标志)
c=ch<<4;
fscanf(fp1,"%01x",&ch);
ch=c+ch; //按16进制数读文件，将2个数字转换为1个字符
j+=2;
buf[i++]=ch;
if(i==8) //每8个字符送入des_64进行解密，然后存入文件
{ des_64(buf,buf,key,type);
fputs((char *)buf,fp2);
i=0;
}
}
}
fclose(fp1);
fclose(fp2);
if(type==1)
AfxMessageBox("加密成功!"); //加密成功后弹出消息提示框
else
AfxMessageBox("解密成功!"); //解密成功后弹出消息提示框
//CDialog::OnOK();
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