form1.cs

C#做的加密解密的东西

			textMd52.Text=reGx.Replace("-","");
			reGx2=reGx.Replace("-","");
			using (StreamWriter sw = new StreamWriter("md5.txt")) 
			{
				sw.Write(reGx2);
			}
		}

		private void button8_Click_1(object sender, System.EventArgs e)
		{
			string reGex,reGex2;
			byte[] bt=UTF8Encoding.UTF8.GetBytes(textMd51.Text.Trim());
			MD5CryptoServiceProvider objMD5;
			objMD5=new MD5CryptoServiceProvider();
			byte[] output=objMD5.ComputeHash (bt);
			reGex=BitConverter.ToString (output);
			reGex2=reGex.Replace("-","");
			textMd52.Text=reGex2; 
			using (StreamWriter sw = new StreamWriter("md5.txt")) 
			{
				sw.Write(textMd52.Text);
			}
		}

		private void button9_Click_1(object sender, System.EventArgs e)
		{
			StreamReader objReader = new StreamReader("md52.txt");
			string sLine="";
			sLine = objReader.ReadLine();
			objReader.Close();
			textSee.Text=sLine;
		}

		private void button6_Click_1(object sender, System.EventArgs e)
		{
			string comparePass;
			string compare,reGex;
			compare=textName.Text+textPass.Text;
			byte[] bt=UTF8Encoding.UTF8.GetBytes(compare);
			MD5CryptoServiceProvider objMD5;
			objMD5=new MD5CryptoServiceProvider();
			byte[] output=objMD5.ComputeHash (bt);
			comparePass=BitConverter.ToString (output);
			reGex=comparePass.Replace("-","");
			StreamReader objReader = new StreamReader("md5.txt");
			string sLine="";
			sLine = objReader.ReadLine();
			objReader.Close();

			if(reGex==sLine)
			{
				MessageBox.Show("检测成功","提示！",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
			else
			{
				MessageBox.Show("用户名或者密码错误！","提示！",MessageBoxButtons.OK,MessageBoxIcon.Warning);
			}
		}

		private void button10_Click_1(object sender, System.EventArgs e)
		{
			Application.Exit();
		}

		private void button14_Click(object sender, System.EventArgs e)
		{
			crypt=new RSACryptoServiceProvider();
			publickey=crypt.ToXmlString(false);
			richText1.Text="密匙：\n"+publickey+"\n";
			privatekey=crypt.ToXmlString(true);
			string info="公匙：\n"+privatekey+"\n";
			richText1.AppendText(info);
			crypt.Clear();
		}

		private void button13_Click(object sender, System.EventArgs e)
		{
			using (StreamWriter sw = new StreamWriter("publickey.txt")) 
			{
				sw.Write(publickey);
			}
		}

		private void button12_Click(object sender, System.EventArgs e)
		{
			using (StreamWriter sw = new StreamWriter("privatekey.txt")) 
			{
				sw.Write(privatekey);
			}
		}

		private void button17_Click(object sender, System.EventArgs e)
		{
			try
			{				
				StreamReader objReader = new StreamReader("PublicKey.txt");
				string sLine="";
				sLine = objReader.ReadToEnd();
				//textSee.Text=sLine.ToString();
				textPub.Text=sLine;	
				publicK=sLine;
				objReader.Close();
				readpubkey=true;
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void button16_Click(object sender, System.EventArgs e)
		{
			if(textBox1.Text =="")
			{    
				MessageBox.Show("加密文字信息不能为空！","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
				return;    
			}
			if(readpubkey==false)
			{
				MessageBox.Show("请检查公钥所在的文件是否损坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
				return;
			}
			try
			{
				crypt=new RSACryptoServiceProvider();
				UTF8Encoding enc=new UTF8Encoding();
				bytes=enc.GetBytes(textBox1.Text);
				crypt.FromXmlString(publicK);//  readpublickey 
				bytes = crypt.Encrypt( bytes,false );
				string encryttext=enc.GetString(bytes); 
				richText2.Text="加密结果：\n"+encryttext; 
			}
			catch
			{
				MessageBox.Show("请检查公匙是否损坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
    
			}
		}

		private void button18_Click(object sender, System.EventArgs e)
		{
			try
			{
				/*readprivatekey  = ReadPrivateKey();*/ 				
				StreamReader objReader = new StreamReader("PrivateKey.txt");
				string sLine="";
				sLine = objReader.ReadToEnd();
				//textSee.Text=sLine.ToString();
				textPri.Text=sLine;	
				privateK=sLine;
				objReader.Close();
				readprikey = true;
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void button15_Click(object sender, System.EventArgs e)
		{
			if(readprikey==false)
			{
				MessageBox.Show("请检查密匙所在的文件是否损坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
				return;
			}
			try
			{
				UTF8Encoding enc=new UTF8Encoding();
				byte [] decryptbyte;
				crypt.FromXmlString (privateK) ;//readprivatekey 
				decryptbyte = crypt.Decrypt( bytes,false );
				string decrypttext=enc.GetString( decryptbyte );
				richText3.Text = "解密结果：\n" + decrypttext;
			}
			catch
			{
				MessageBox.Show("请检查私匙是否损坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
    
			} 
		}

		private void button19_Click(object sender, System.EventArgs e)
		{
			OpenFileDialog open = new OpenFileDialog( );
			open.Filter="Text File (*.txt)|*.txt|All Files (*.*)|*.*";
			open.ShowDialog();
			textBox2.Text=open.FileName;
			openla = true;
		}

		private void button20_Click(object sender, System.EventArgs e)
		{
			try
			{
				SaveFileDialog save=new SaveFileDialog();
				save.Filter="File Text (*.txt)|*.txt|All File (*.*)|*.*";
				save.ShowDialog();
				textBox3.Text=save.FileName;
				savela = true; 
			}
			catch
			{
				MessageBox.Show("请输入文件名字！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
				return;
			}
		}

		private void button23_Click(object sender, System.EventArgs e)
		{
			//readpublickey = ReadPublicKey();
			try
			{
				/*readpublickey = ReadPublicKey();*/
				
				StreamReader objReader = new StreamReader("PublicKey.txt");
				string sLine="";
				sLine = objReader.ReadToEnd();
				//textSee.Text=sLine.ToString();
				textPub.Text=sLine;	
				publicK=sLine;
				objReader.Close();
				readpubkey=true;
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void button24_Click(object sender, System.EventArgs e)
		{
			//readprivatekey  =ReadPrivateKey();
			try
			{
				/*readprivatekey  = ReadPrivateKey();*/ 
				
				StreamReader objReader = new StreamReader("PrivateKey.txt");
				string sLine="";
				sLine = objReader.ReadToEnd();
				//textSee.Text=sLine.ToString();
				textPri.Text=sLine;	
				privateK=sLine;
				objReader.Close();
				readprikey = true;
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void button21_Click(object sender, System.EventArgs e)
		{
			if(readpubkey != true)
			{
				MessageBox.Show("请检查公匙所在的文件是否破坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
				return;
			}
			if(openla==true&&savela==true)
			{
				crypt=new RSACryptoServiceProvider();
				crypt.FromXmlString(publicK);// readpublickey 
				UTF8Encoding enc=new UTF8Encoding();
				//读取原文件到一个string 去啊
				StreamReader sr=new StreamReader(textBox2.Text,Encoding.Default);
				string textinfo=sr.ReadToEnd();
				sr.Close();
			    richText4.AppendText( "原文件内容：\n" + textinfo + "\n" );
				//开始加密
				string readinfo=EncryptFile(textinfo,textBox3.Text);
				richText5.AppendText( "加密文件已经保存到：" + textBox3.Text + "\n"  );
				richText5.AppendText( "加密结果：\n" + readinfo);  
			}
			else    
				MessageBox.Show("请选择你要加密的文件或者要保存的文件！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
		}

		private void button22_Click(object sender, System.EventArgs e)
		{
		{
			if(readprikey==false)
			{
				MessageBox.Show("请检查密匙所在的文件是否破坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
				return;
			}
			if(openla==true&&savela==true)
			{
				try
				{
					crypt=new RSACryptoServiceProvider();
					crypt.FromXmlString(privateK);// readprivatekey 
					string decryptinfo = DecryptFile(textBox2.Text,textBox3.Text);
					richText5.AppendText( "解密文件已经保存到：" + textBox3.Text+ "\n" );
					richText5.AppendText("解密结果：\n" + decryptinfo);
				}
				catch
				{
					MessageBox.Show("请检查密匙文件是否和公匙相对应或者密匙文件损坏！","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
					return;
				}
			}
			else
				MessageBox.Show("请选择你要解密的文件或者要保存的文件！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);

		}
		}

		private void button25_Click(object sender, System.EventArgs e)
		{
			textBox2.Text="";
			textBox3.Text="";
			richText4.Text="";
			richText5.Text="";
			textPub.Text="";
			textPri.Text="";
		}

		private void button27_Click(object sender, System.EventArgs e)
		{
			Application.Exit();
		}

		private void button26_Click(object sender, System.EventArgs e)
		{
			Application.Exit();
		}

		private void button10_Click(object sender, System.EventArgs e)
		{
				string reGex,reGex2;
				byte[] bt=UTF8Encoding.UTF8.GetBytes(textPass1.Text.Trim());
				MD5CryptoServiceProvider objMD5;
				objMD5=new MD5CryptoServiceProvider();
				byte[] output=objMD5.ComputeHash (bt);
				reGex=BitConverter.ToString (output);
				reGex2=reGex.Replace("-","");

				if (textName1.Text=="" || textPass1.Text =="")
				{
					MessageBox.Show("您提交的信息不完全","提示！");
					return;
				}
				try
				{

				string strCon = " Provider=Microsoft.Jet.OLEDB.4.0; Data Source=usermd5.mdb ";
				OleDbConnection myConn=new OleDbConnection(strCon);
					string strInsert = "INSERT INTO cc_admin(usernam,passwor) VALUES ('"
						+ textName1.Text +"','"
						+ reGex2 +"')";
				myConn.Open();				
				OleDbCommand myCmd = new OleDbCommand(strInsert,myConn);
				myCmd.ExecuteNonQuery();
				myConn.Close();
				MessageBox.Show("添加用户成功！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message,"提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
		}

		private void button28_Click(object sender, System.EventArgs e)
		{
			string reGex,reGex2;
			byte[] bt=UTF8Encoding.UTF8.GetBytes(textPass.Text.Trim());
			MD5CryptoServiceProvider objMD5;
			objMD5=new MD5CryptoServiceProvider();
			byte[] output=objMD5.ComputeHash (bt);
			reGex=BitConverter.ToString (output);
			reGex2=reGex.Replace("-","");

			if (textName.Text=="" || textPass.Text =="")
			{
				MessageBox.Show("您提交的信息不完全","提示！");
				return;
			}
				string strCon = " Provider=Microsoft.Jet.OLEDB.4.0; Data Source=usermd5.mdb ";
				OleDbConnection myConn=new OleDbConnection(strCon);
				string strSel = "select count(*) from cc_admin where usernam='"+textName.Text+"' and passwor='"+reGex2+"'";
				myConn.Open();				
				OleDbCommand myCmd = new OleDbCommand(strSel,myConn);
				int Count=(int)myCmd.ExecuteScalar();
				myConn.Close();
				if(Count==0)
				{
					MessageBox.Show("没有这个用户！请核对您是否输入正确！","提示！");
					textName.Text="";
					textPass.Text="";					
					return;
				}
			try
			{
				MessageBox.Show("通过验证！","提示！",MessageBoxButtons.OK,MessageBoxIcon.Information);
				textName.Text="";
				textPass.Text="";
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message,"提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
		}
	}
}