?? desdlg.cpp
字號:
static int i,j,str[8];
int r=0;
int len=m.GetLength();
m_fSize=0;
m_StrSource="";
while(8*m_fSize<len){
for(i=0;i<8;i++)
{
if(8*m_fSize+i==len)
{
r=i;
break;
}
ch=m.GetAt(8*m_fSize+i);
if(ch>0)
str[7]=0;
else{ //unicode字符
str[7]=1;
ch=0-ch;
}
for(j=0;j<7;j++)
{
str[j]=ch%2;
ch=ch/2;
}
for(j=7;j>=0;j--)
m_StrSource+=char(str[j]+'0');
}
m_fSize++;
}//while
if(r)
{
for(i=0;i<(8-r)*8;i++)
m_StrSource+='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篩選表
int offSet[17]={0,1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
int C[57]; //用來存放循環左移以后的通信密鑰
for(int i=1;i<29-offSet[kn];i++)//1循環左移一位(第一次迭代的位數為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]]; //生成子密鑰Kx
}
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擴展換表
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置換表
//八個密碼盒
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], //用來存放經過S盒后得到的8個數
frk[33], //用來存放經過P32置換后的密文
temp[5],
RE1[49];
//進行第x次迭代
for(int i=1;i<=48;i++)//經過E/P變換擴充，由32位變為48位
RE1[i]=RE[E[i-1]]; //RE是左側明文
for(i=1;i<=48;i++)//與K1按位作不進位加法運算/K1為第一組子密鑰
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組，每組6個
{
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];
}//下面經過S盒，得到8個數,每個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個數變換輸出二進制
{
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++)//將上文輸出的二進制數經過P32變換
frk[i]=f[P[i-1]];
for(i=1;i<33;i++)
Lx[i]=RE[i];
for(i=1;i<33;i++) //將右側明文作不進位二進制加法運算
{
Rx[i]=LE[i]+frk[i];
if(Rx[i]==2)
Rx[i]=0;
}
}
void CDESDlg::Onback()
{
// TODO: Add your control notification handler code here
KEY_BIO();
if(m_runable){
DES_DECIPHER();
}
}
void CDESDlg::DES_DECIPHER()
{
int i,j,t2[65]; //用來存放經過IP初始置換后的密文
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初始置換表
int k0[57],
C0[29],D0[29];//C代表p56置換后的左半部分，D代表右半部分
//P56置換表
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};
/*******************************************************/
//生成子密鑰
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];
}
}
//生成完畢
/*******************************************************/
/**********/
/*開始解密*/
/**********/
UpdateData(FALSE);
m_StrCiphered=s;
m_StrSource="";
m="";
long len=m_StrCiphered.GetLength()-1;
long constlen=len;
if(len%88!=0&&len%88<85){ //密文不完整
MessageBox("密文不完整!",
"消息",
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){ //密文不合規范
MessageBox("密文不符合規范!","消息",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];
}
/**************************************************/
//進行十六次迭代
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];
}
}
//迭代完畢
/************************************************************/
int t[65];
for(i=1;i<=32;i++)
{
t[i]=RE[i];
t[i+32]=LE[i];
}
for(i=1;i<=64;i++) //將明文進行IP逆置換
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=m+(char)ch;
ch=0;
}//for
}//while
}//if(密文合乎規范)
if(m_runable){
UpdateData(FALSE);
MessageBox("解密成功!","提示",MB_OK|MB_ICONINFORMATION);
}
}
void CDESDlg::Onclear1()
{
// TODO: Add your control notification handler code here
m="";
UpdateData(FALSE);
}
void CDESDlg::Onclear2()
{
// TODO: Add your control notification handler code here
s="";
UpdateData(FALSE);
}
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