keyword_cipher.cpp

这是我编的包括古典密码

// KeyWord_Cipher.cpp : implementation file
//

#include "stdafx.h"
#include "MY_CAP.h"
#include "KeyWord_Cipher.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CKeyWord_Cipher dialog

CMY_CAPDlg *Main_CapK;
CKeyWord_Cipher::CKeyWord_Cipher(CWnd* pParent /*=NULL*/)
	: CDialog(CKeyWord_Cipher::IDD, pParent)
{
	//{{AFX_DATA_INIT(CKeyWord_Cipher)
	m_KeyWord = _T("");
	//}}AFX_DATA_INIT
}


void CKeyWord_Cipher::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CKeyWord_Cipher)
	DDX_Text(pDX, IDC_KEYWORD, m_KeyWord);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CKeyWord_Cipher, CDialog)
	//{{AFX_MSG_MAP(CKeyWord_Cipher)
	ON_COMMAND(IDD_ENCIPHER, OnEncipher)
	ON_COMMAND(IDD_DECIPHER, OnDecipher)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CKeyWord_Cipher message handlers

void CKeyWord_Cipher::OnEncipher() 
{
	// TODO: Add your command handler code here
	UpdateData(TRUE);
	Main_CapK->UpdateData(TRUE);
	m_Plaintext = Main_CapK->m_Plaintext;
	m_RKeyWord = UpdatePhrase(m_KeyWord);
	m_RKeyWord = Produce_Cipher(m_RKeyWord);
	m_Ciphertext = Produce_Cipher(m_Plaintext,0);
	Main_CapK->m_Ciphertext = m_Ciphertext;
	Main_CapK->UpdateData(FALSE);
	if (Main_CapK ->m_Ciphertext.GetLength () != 0)
		Main_CapK -> OnSave_Ciphertext ();
}

void CKeyWord_Cipher::OnDecipher() 
{
	// TODO: Add your command handler code here
	UpdateData(TRUE);
	Main_CapK->UpdateData(TRUE);
	m_Ciphertext = Main_CapK->m_Ciphertext;
	m_RKeyWord = UpdatePhrase(m_KeyWord);
	m_RKeyWord = Produce_Cipher(m_RKeyWord);
	m_Plaintext = Produce_Cipher(m_Ciphertext,1);
	Main_CapK->m_Plaintext = m_Plaintext;
	Main_CapK->UpdateData(FALSE);
	if (Main_CapK ->m_Plaintext.GetLength () != 0)
		Main_CapK -> OnSave_Plaintext ();
}

CString CKeyWord_Cipher::UpdatePhrase(CString phrase)
{
	CString Phrase,temp;
	int i = 0;
	while( i < phrase.GetLength() )
	{
		if(phrase[i] >= 'a' && phrase[i] <= 'z') 
			temp = phrase[i];
		else if( phrase[i] >= 'A' && phrase[i] <= 'Z' ) 
			temp = phrase - 'A' + 'a';
		else
		{
			i++;
			continue;
		}
		if( Phrase.FindOneOf(temp) == -1 ) Phrase += phrase[i];
		i++;
	}
	return Phrase;
}

CString CKeyWord_Cipher::Produce_Cipher(CString phrase)
{
	CString Ciphertext,temp;
	int i = 0;
	Ciphertext = phrase;
	while( i <= 25 )
	{
		temp = 'a' + i;
		if( Ciphertext.FindOneOf(temp) == -1 ) 
		{
			Ciphertext += temp;
		}
		i++;
	}
	return Ciphertext;
}

CString CKeyWord_Cipher::Produce_Cipher(CString text, int choice)
{
	CString Text,temp;
	int i = 0;
	if( choice == 0 ) //EnCipher
	{
		while( i < text.GetLength() )
		{
			if( text[i] >= 'a' && text[i] <= 'z')
			{
				Text += m_RKeyWord[text[i]-'a'];
			}
			else if( text[i] >= 'A' && text[i] <= 'Z' )
			{
				Text += m_RKeyWord[text[i]-'A'];
			}
/*			else
			{
				Text += text[i];
			}*/
			i++;
		}
	}
	else if( choice == 1 ) //DeCipher
	{
		while( i < text.GetLength() )
		{
			if( text[i] >= 'a' && text[i] <= 'z')
			{
				temp = text[i];
				Text += m_RKeyWord.FindOneOf(temp)+'a';
			}
			else if( text[i] >= 'A' && text[i] <= 'Z' )
			{
				temp = text[i] - 'A' + 'a';
				Text += m_RKeyWord.FindOneOf(temp)+'a';
			}
/*			else
			{
				Text += text[i];
			}*/
			i++;
		}
	}
	return Text;
}

void CKeyWord_Cipher::Trans_Dialog(CWnd *temp)
{
	Main_CapK = (CMY_CAPDlg *)temp;
}