📄 desdlg.cpp
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// DesDlg.cpp : implementation file
//
#include "stdafx.h"
#include "Crypt.h"
#include "DesDlg.h"
//#include "DES.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
//相关的变量
char plaintext[1000]; //填充后的明文
CString plaintext_0; //原始明文
BOOL bj = TRUE;
char cryptography_ECB[1000]; //ECB密文
char cryptography_CBC[1000]; //CBC密文
char cryptography_CFB[1000]; //CFB密文
char cryptography_OFB[1000]; //OFB密文
char Key_64[8]; //初始的64 bit密钥
char Key_56[7]; //64 bit到56 bit密钥
char Key[17][6]; //16次运算的子密钥
char IV[8]; //初始随机向量
int len, LL; //原始明文的长度和填充后的长度
//密钥初始交换数组
int 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};
//用于密钥的56 bit输入48 bit输出
int 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};
//用于明文的初始置换
int ip_1[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};
//用于明文的逆初始置换
int ip_2[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};
//用于32 bit的明文扩充为48 bit用于复杂函数
int E_P[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};
//用于与ki作用后的32 bit置换
int 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};
//8个S盒数据
int S_box[9][64] = {
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
{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},
};
//移位数组
int Ls[17] = {0,1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
/////////////////////////////////////////////////////////////////////////////
// CDesDlg dialog
CDesDlg::CDesDlg(CWnd* pParent /*=NULL*/)
: CDialog(CDesDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CDesDlg)
m_strPlainText = _T("");
m_strBKey = _T("");
m_strBPlainText = _T("");
m_strCBCCipher = _T("");
m_strCFBCipher = _T("");
m_strECBCipher = _T("");
m_strInitVector = _T("");
m_strOFBCipher = _T("");
m_iNum = 0;
m_strKey = _T("");
//}}AFX_DATA_INIT
}
void CDesDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CDesDlg)
DDX_Text(pDX, IDC_PlainText, m_strPlainText);
DDX_Text(pDX, IDC_BKey, m_strBKey);
DDX_Text(pDX, IDC_BPlainText, m_strBPlainText);
DDX_Text(pDX, IDC_CBCCipher, m_strCBCCipher);
DDX_Text(pDX, IDC_CFBCipher, m_strCFBCipher);
DDX_Text(pDX, IDC_ECBCipher, m_strECBCipher);
DDX_Text(pDX, IDC_InitVector, m_strInitVector);
DDX_Text(pDX, IDC_OFBCipher, m_strOFBCipher);
DDX_Text(pDX, IDC_Num, m_iNum);
DDX_Text(pDX, IDC_Key, m_strKey);
DDV_MaxChars(pDX, m_strKey, 8);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CDesDlg, CDialog)
//{{AFX_MSG_MAP(CDesDlg)
ON_BN_CLICKED(IDC_Encrypt, OnDESEncrypt)
ON_BN_CLICKED(IDC_ECBDecrypt, OnECBDecrypt)
ON_BN_CLICKED(IDC_CBCDecrypt, OnCBCDecrypt)
ON_BN_CLICKED(IDC_CFBDecrypt, OnCFBDecrypt)
ON_BN_CLICKED(IDC_OFBDecrypt, OnOFBDecrypt)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDesDlg message handlers
//---------------------------------DES加密算法---------------------------------------
/*
1. 得到明文字符串；
2. 将明文字符串分组；
3. 对每组明文进行加密；
*/
void CDesDlg::OnDESEncrypt()
{
// TODO: Add your control notification handler code here
bj = TRUE;
Create_Key();
if(!bj) return;
Create_IV();
Encrypt();
}
//-----------------------------------------------------------------------------------
//选择字符ch的第n(1--8)位二进制数据
BOOL CDesDlg::pick(char ch, int n)
{
return(ch & char(1)<<(8-n));
}
BOOL CDesDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// TODO: Add extra initialization here
//限定编辑框只能输入字母
//m_wndEdit.SubclassDlgItem(IDC_PlainText, this);
return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}
//实现IP置换,*p是置换数组,*C是要交换的字符串,n是要交换的bit总数
void CDesDlg::IP(int *p, int n, char *C)
{
int i, nn;
if(n/8*8 == n)
nn = n/8;
else
nn = n/8 + 1;
char *temp = new char[nn];
for(i=0; i<nn; i++)
temp[i] = char(0);
for(i=0; i<n; i++)
{
int t1 = (p[i]-1)/8;
int t2 = (p[i]-1)%8 + 1;
int j = i%8 + 1;
if(pick(C[t1], t2))
temp[i/8] = (temp[i/8])|(char(1)<<(8-j));
}
for(i=0; i<nn; i++)
C[i] = temp[i];
delete temp;
}
//对字符串C进行循环左移k位, n是总长
void CDesDlg::LS(int k, int n, char *C)
{
int i;
int *p = new int[n];
//先构造置换数组
for(i=0; i<n; i++)
p[i] = (i+k)%n + 1;
//利用IP移位
IP(p, n, C);
delete p;
}
//生成密钥
void CDesDlg::Create_Key()
{
CString key0;
GetDlgItemText(IDC_Key, key0);
int i;
if(key0.GetLength() != 8)
{
MessageBox("请输入8 Byte密码!", "error!", MB_ICONHAND);
bj = FALSE;
return;
}
char *laa = new char[8*8 + 8];
int h = 0;
for(i=0; i<8; i++)
{
for(int j=1; j<=8; j++)
{
if(pick(key0.GetAt(i), j))
laa[h++] = '1';
else
laa[h++] = '0';
}
laa[h++] = ' ';
}
laa[h] = '\0';
SetDlgItemText(IDC_BKey, laa);
char L[4], R[4];
for(i=0; i<4; i++)
{
L[i] = char(0);
R[i] = char(0);
}
for(i=0; i<8; i++)
Key_64[i] = key0.GetAt(i);
IP(PC_1, 56, Key_56, Key_64);
int p1[28], p2[28];
for(i=0; i<28; i++)
{
p1[i] = i+1;
p2[i] = i+29;
}
IP(p1,28,L,Key_56);
IP(p2,28,R,Key_56);
for(i=1; i<=16; i++)
{
LS(Ls[i], 28, L);
LS(Ls[i], 28, R);
char temp[7];
for(int j=0; j<7; j++)
temp[j] = char(0);
Combination(L,28,R,28,temp);
for(j=0; j<6; j++)
Key[i][j] = char(0);
IP(PC_2, 48, Key[i], temp);
}
}
//用于压缩和扩充的IP置换，从c1中读取数据，使得C的数据得到改变（根据p指引）
void CDesDlg::IP(int *p, int n, char *C, char *c1)
{
int i;
int nn;
if(n/8*8 == n)
nn = n/8;
else
nn = n/8 + 1;
char *temp1 = new char[nn];
for(i=0; i<nn; i++)
temp1[i] = char(0);
for(i=0; i<n; i++)
{
int t1 = (p[i]-1)/8;
int t2 = (p[i]-1)%8 + 1;
int j = i%8 + 1;
if(pick(c1[t1], t2))
temp1[i/8] = (temp1[i/8]) | (char(1)<<(8-j));
}
for(i=0; i<nn; i++)
C[i] = temp1[i];
delete temp1;
}
//合并c1,c2到C, n1和n2为c1和c2的长度
void CDesDlg::Combination(char *c1, int n1, char *c2, int n2, char *C)
{
int i;
for(i=0; i<(n1+n2)/8+1; i++)
C[i] = char(0);
for(i=0; i<n1; i++)
{
int t1 = i/8;
int t2 = i%8 + 1;
if(pick(c1[t1], t2))
C[i/8] = (C[i/8])|(char(1)<<(8-t2));
}
for(i=n1; i<n1+n2; i++)
{
int t1 = (i-n1)/8;
int t2 = (i-n1)%8 + 1;
if(pick(c2[t1], t2))
C[i/8] = (C[i/8])|(char(1)<<(8-((i%8)+1)));
}
}
//-------------------------------------------------------------//
//加密部分
void CDesDlg::Encrypt()
{
//用于存放密文区块
int k = 0;
int i, j;
//用于每次取出64 bit字符进行运算
char p[8];
//用于保存每个加密区块的结果
char q[8];
//加密的序号
int index = 0;
GetDlgItemText(IDC_PlainText, plaintext_0);
len = plaintext_0.GetLength();
//在明文框显示明文字符数
SetDlgItemInt(IDC_Num, len, TRUE);
if(len%8 != 0)
LL = len+8-len%8;
else
LL = len;
for(i=0; i<len; i++)
plaintext[i] = plaintext_0.GetAt(i);
for(i=len; i<LL; i++)
plaintext[i] = '#';
//显示二进制明文
char *la = new char[LL*8+LL];
int h = 0;
for(i=0; i<LL; i++)
{
for(j=1; j<=8; j++)
{
if(pick(plaintext[i],j))
la[h++] = '1';
else
la[h++] = '0';
}
la[h++] = ' ';
}
//设置结束符标志
la[h] = '\0';
SetDlgItemText(IDC_BPlainText, la);
//-----------------------ECB加密算法----------------------//
for(i=0; i<LL; i+=8)
{
//每次取64 bit（8个字符）进行运算
for(j=0; j<8; j++)
p[j] = plaintext[i+j];
//初始的IP置换
IP(ip_1, 64, p);
char L[4], R[4];
for(k=0; k<4; k++)
{
L[k] = p[k];
R[k] = p[4+k];
}
for(j=1; j<=16; j++)
{
Fk(L, R, j);
InterChange(L, R, 4);
}
for(j=0; j<4; j++)
{
p[j] = L[j];
p[j+4] = R[j];
}
//逆初始置换
IP(ip_2, 64, p);
for(j=0; j<8; j++)
cryptography_ECB[i+j] = p[j];
}
//-------------显示ECB二进制密文----------------//
char *code_ecb = new char[LL*8 + LL];
h = 0;
for(i=0; i<LL; i++)
{
for(j=1; j<=8; j++)
{
if(pick(cryptography_ECB[i], j))
code_ecb[h++] = '1';
else
code_ecb[h++] = '0';
}
code_ecb[h++] = ' ';
}
code_ecb[h] = '\0';
plaintext[LL] = '\0';
cryptography_ECB[LL] = '\0';
SetDlgItemText(IDC_ECBCipher, code_ecb);
//---------------------ECB加密结束--------------------------//
//------------------------CBC加密算法-----------------------//
for(i=0; i<LL; i+=8)
{
for(j=0; j<8; j++)
p[j] = plaintext[i+j];
if(index == 0)
{
for(j=0; j<8; j++)
p[j] = p[j] ^ IV[j];
}
else
{
for(j=0; j<8; j++)
p[j] = p[j] ^ q[j];
}
IP(ip_1, 64, p);
char L[4], R[4];
for(k=0; k<4; k++)
{
L[k] = p[k];
R[k] = p[4+k];
}
for(j=1; j<=16; j++)
{
Fk(L, R, j);
InterChange(L, R, 4);
}
for(k=0; k<4; k++)
{
q[k] = L[k];
q[k+4] = R[k];
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