📄 demo.txt
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}
for(i=1;i<=64;i++)
m1[i]=m[ip[i-1]];
for(i=1;i<=32;i++)
L0[i]=m1[i]; //明文左侧的初始化
for(i=33;i<=64;i++)
R0[i-32]=m1[i]; //明文右侧的初始化
/**************************************************/
//进行十六次迭代
int RE[33],LE[33],Lx[33],Rx[33];
for(i=1;i<=32;i++){
RE[i]=R0[i];
LE[i]=L0[i];
}
for(num=1;num<=16;num++){
DES_ITERATIVE(LE,RE,Lx,Rx,K[num]);
for(i=1;i<=32;i++){
LE[i]=Lx[i];
RE[i]=Rx[i];
}
}
//迭代完毕
/************************************************************/
int t[65];
for(i=1;i<=32;i++)
{
t[i]=LE[i];
t[i+32]=RE[i];
}
for(i=1;i<=64;i++) //将密文进行IP逆置换
t1[i]=t[IP_REVERSE[i-1]];
for(i=1;i<=64;i++)
{
m_strText=m_strText+(char)(48+t1[i]); //48为字符0的ASCII码
if(i%8==0) //逢8位空格
m_strText=m_strText+" ";
}
m_ctlProgress.SetPos(int(100*(1-64*(m_fSize-1)/float(len))));
}//while
m_ctlProgress.SetPos(100);
UpdateData(false);
MessageBox("加密结束，请继续下一步操作!","好消息",MB_OK|MB_ICONINFORMATION);
}
void CDESDlg::DES_DECIPHER()
{
int i,j,t2[65]; //用来存放经过IP初始置换后的密文
int IP_REVERSE[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};
int ip[65]={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}; //IP初始置换表
int k0[57],
C0[29],D0[29];//C代表p56置换后的左半部分，D代表右半部分
//P56置换表
int P56[57]={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};
/*******************************************************/
//生成子密钥
for(i=1;i<57;i++)
k0[i]=Key[P56[i-1]];
for(i=1;i<29;i++)
C0[i]=k0[i];
for(i=29;i<=56;i++)
D0[i-28]=k0[i];
int CE[29],DE[29],Cx[29],Dx[29];
for(i=1;i<=28;i++){
CE[i]=C0[i];
DE[i]=D0[i];
}
for(int num=1;num<=16;num++){
DES_GenerateSubkey(CE, DE,
Cx, Dx,K,num);
for(i=1;i<=28;i++){
CE[i]=Cx[i];
DE[i]=Dx[i];
}
}
//生成完毕
/*******************************************************/
/**********/
/*开始解密*/
/**********/
m_ctlProgress.SetPos(0);
m_StrCiphered=m_strText;
m_StrSource="";
m_strText="";
long len=m_StrCiphered.GetLength();
long constlen=len;
if(len%88!=0&&len%88<85){ //密文不完整
MessageBox("密文不完整!","密文错",MB_OK|MB_ICONERROR);
m_runable=false;
}
else{
if(len%88!=0)
len+=(88-len%88);
int x=0;
while((len-=11*8)>=0){
for(i=1;i<=64;i++){
t1[i]=int(m_StrCiphered.GetAt(x)-'0');
if(t1[i]!=0&&t1[i]!=1){ //密文不合规范
MessageBox("密文不符合规范!","密文错",MB_OK|MB_ICONERROR);
m_runable=false;
break;
}
if(i%8==0)
x+=4;
else
x++;
}
if(m_runable==false)
break;
for(i=1;i<=64;i++)
{
t2[i]=t1[ip[i-1]];
}
for(i=1;i<33;i++)
{
R0[i]=t2[i];
L0[i]=t2[i+32];
}
/**************************************************/
//进行十六次迭代
int RE[33],LE[33],Lx[33],Rx[33];
for(i=1;i<=32;i++){
RE[i]=R0[i];
LE[i]=L0[i];
}
for(int num=1;num<=16;num++){
DES_ITERATIVE(LE,RE,Lx,Rx,
K[17-num]);
for(i=1;i<=32;i++){
LE[i]=Lx[i];
RE[i]=Rx[i];
}
}
//迭代完毕
/************************************************************/
int t[65];
for(i=1;i<=32;i++)
{
t[i]=RE[i];
t[i+32]=LE[i];
}
for(i=1;i<=64;i++) //将明文进行IP逆置换
t3[i]=t[IP_REVERSE[i-1]];
int ch=0;
for(i=0;i<=7;i++)
{
for(j=8;j>1;j--)
ch=ch+t3[i*8+j]*(int)pow(2,8-j);
if(t3[i*8+1]==1)
ch=0-ch;
m_strText=m_strText+(char)ch;
ch=0;
}//for
m_ctlProgress.SetPos(int((1-float(len)/constlen)*100));
}//while
}//if(密文合乎规范)
if(m_runable){
UpdateData(FALSE);
MessageBox("解密结束，请继续下一步操作!","好消息",MB_OK|MB_ICONINFORMATION);
}
}
void CDESDlg::OnCipherbutton()
{
KEY_BIO();
if(m_runable){
DES_ENCIPHER();
}
}
void CDESDlg::OnDecipherbutton()
{
KEY_BIO();
if(m_runable){
DES_DECIPHER();
}
}
void CDESDlg::OnClear()
{
m_strText="";
UpdateData(FALSE);
}
void CDESDlg::DES_ITERATIVE(int LE[],int RE[],int Lx[],int Rx[],
int sub_key[])
{
int s11[7],s21[7],s31[7],s41[7],s51[7],s61[7],s71[7],s81[7];
int E[49]={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,
24,25,26,27,28,29,28,29,30,31,32,31}; // E/P扩展换表
int P[33]={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};//P32置换表
//八个密码盒
int s1[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};
int s2[4][16]={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};
int s3[4][16]={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};
int s4[4][16]={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};
int s5[4][16]={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};
int s6[4][16]={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};
int s7[4][16]={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};
int s8[4][16]={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};
static int f[33],j;
int s[9], //用来存放经过S盒后得到的8个数
frk[33], //用来存放经过P32置换后的密文
temp[5],
RE1[49];
//进行第x次迭代
for(int i=1;i<=48;i++)//经过E/P变换扩充，由32位变为48位
RE1[i]=RE[E[i-1]]; //RE是左侧明文
for(i=1;i<=48;i++)//与K1按位作不进位加法运算/K1为第一组子密钥
RE1[i]=RE1[i]+sub_key[i];
for(i=1;i<=48;i++)
{
if(RE1[i]==2)
RE1[i]=0;
}
for(i=1;i<7;i++)//48位分成8组，每组6个
{
s11[i]=RE1[i];
s21[i]=RE1[i+6];
s31[i]=RE1[i+12];
s41[i]=RE1[i+18];
s51[i]=RE1[i+24];
s61[i]=RE1[i+30];
s71[i]=RE1[i+36];
s81[i]=RE1[i+42];
}//下面经过S盒，得到8个数,每个4 bit(0-15)
s[1]=s1[s11[6]+s11[1]*2][s11[5]+s11[4]*2+s11[3]*4+s11[2]*8];
s[2]=s2[s21[6]+s21[1]*2][s21[5]+s21[4]*2+s21[3]*4+s21[2]*8];
s[3]=s3[s31[6]+s31[1]*2][s31[5]+s31[4]*2+s31[3]*4+s31[2]*8];
s[4]=s4[s41[6]+s41[1]*2][s41[5]+s41[4]*2+s41[3]*4+s41[2]*8];
s[5]=s5[s51[6]+s51[1]*2][s51[5]+s51[4]*2+s51[3]*4+s51[2]*8];
s[6]=s6[s61[6]+s61[1]*2][s61[5]+s61[4]*2+s61[3]*4+s61[2]*8];
s[7]=s7[s71[6]+s71[1]*2][s71[5]+s71[4]*2+s71[3]*4+s71[2]*8];
s[8]=s8[s81[6]+s81[1]*2][s81[5]+s81[4]*2+s81[3]*4+s81[2]*8];
for(i=0;i<8;i++)//8个数变换输出二进制
{
for(j=1;j<5;j++)
{
temp[j]=s[i+1]%2;
s[i+1]=s[i+1]/2;
}
for(j=1;j<5;j++)
f[4*i+j]=temp[5-j];
}
for(i=1;i<33;i++)//将上文输出的二进制数经过P32变换
frk[i]=f[P[i-1]];
for(i=1;i<33;i++)
Lx[i]=RE[i];
for(i=1;i<33;i++) //将右侧明文作不进位二进制加法运算
{
Rx[i]=LE[i]+frk[i];
if(Rx[i]==2)
Rx[i]=0;
}
}
void CDESDlg::DES_GenerateSubkey(int CE[], int DE[],
int Cx[], int Dx[],
int K[][49],int kn)
{
int Q48[49]={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}; //Q48筛选表
int offSet[17]={0,1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
int C[57]; //用来存放循环左移以后的通信密钥
for(int i=1;i<29-offSet[kn];i++)//1循环左移一位(第一次迭代的位数为1)
{
Cx[i]=CE[i+1];
Dx[i]=DE[i+1];
}
Cx[28]=CE[2];
Dx[28]=DE[2];
if(offSet[kn]==2){
Cx[27]=CE[1];
Dx[27]=DE[1];
}
for(i=1;i<=28;i++)
{
C[i]=Cx[i];
C[i+28]=Dx[i];
}
for(i=1;i<=48;i++)
K[kn][i]=C[Q48[i-1]]; //生成子密钥Kx
}
void CDESDlg::OnDefaultfill()
{
m_strText="为什么我的眼里常含泪水?因为我对这土地爱得深沉......";
UpdateData(FALSE);
}
void CDESDlg::OnShift()
{
CMenu *m_lMenu;
m_lMenu=GetMenu();
if(m_seeable==false){
m_seeable=true;
((CEdit*)GetDlgItem(IDC_KEY))->SetPasswordChar(0);
m_lMenu->ModifyMenu(IDM_SHIFT,MF_STRING,IDM_SHIFT,"密钥不可见");
}
else{
m_seeable=false;
((CEdit*)GetDlgItem(IDC_KEY))->SetPasswordChar('*');
m_lMenu->ModifyMenu(IDM_SHIFT,MF_STRING,IDM_SHIFT,"密钥可见");
}
Invalidate(true);
}
void CDESDlg::OnContextMenu(CWnd* pWnd, CPoint point)
{
CMenu *m_lMenu;
m_lMenu=GetMenu();
m_lMenu=m_lMenu->GetSubMenu(0);
m_lMenu->TrackPopupMenu(TPM_LEFTALIGN+TPM_RIGHTBUTTON,
point.x,point.y,this,NULL);
}
void CDESDlg::OnSfileopen()
{
CFileDialog m_foDlg(TRUE,"txt","Demo.txt",
OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
"文本文件(*.txt)|*.txt|数据文件(.dat)|*.dat|所有文件(*.*)|*.*||",
NULL);
CString fileName;
m_strText="";
FILE *fp;
if(m_foDlg.DoModal()==IDOK){
fileName=m_foDlg.GetPathName();
fp=fopen(fileName,"r");
if(ferror(fp)){
fclose(fp);
MessageBox("文件打开失败!","警告",MB_OK|MB_ICONWARNING);
}
else{
while(!feof(fp))
m_strText+=fgetc(fp);
fclose(fp);
}
}
UpdateData(FALSE);
}
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