//解密
private async void button3_Click(object sender, EventArgs e)
{
using (_longOperation.Start())
{
await Task.Run(() =>
{
string filePath = this.descryFilePathTxt.Text.Trim();
string directoryPath = this.descTargetDirectoryTxt.Text.Trim();
//判断是否选择了文件
if (filePath.Length == 0)
{
MessageBox.Show("Please select a file", "Info", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
else
{
//判断选择文件是否存在
if (!File.Exists(filePath))
{
MessageBox.Show("Please select a valid file", "Info", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
}
//检查选择的输出目录
if (directoryPath.Length == 0)
{
MessageBox.Show("Please select target directory", "Info", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
else
{
//不存在则创建
if (!Directory.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
}
//检查输入的密码
if (this.descpasswordTxt.Text.Trim().Length == 0)
{
MessageBox.Show("Please input password", "Info", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
//检查选择的加密模式
int CipherModeSelectedIndex = -1;
if (CipherModeComboBox.InvokeRequired)
{
CipherModeComboBox.Invoke(new MethodInvoker(delegate { CipherModeSelectedIndex = CipherModeComboBox.SelectedIndex; }));
}
if (CipherModeSelectedIndex == -1)
{
MessageBox.Show("Please select cipher mode", "Info", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
//同解密，转换为RijndaelManaged所需要CipherMode的枚举类型
CipherMode cm = CipherMode.CBC;
switch (CipherModeArray[CipherModeSelectedIndex])
{
case "CBC":
cm = CipherMode.CBC;
break;
case "ECB":
cm = CipherMode.ECB;
break;
case "CFB":
cm = CipherMode.CFB;
break;
}
//filePath
//得到被加密文件名（包含后缀
string sourcefileName = filePath.Remove(0, filePath.LastIndexOf("\\") + 1).Replace(cipherFileType, "");
//得到被加密文件的名称（不包含后缀
string sourceFileNameWithoutType = sourcefileName.Remove(sourcefileName.LastIndexOf("."));
//得到被加密文件的后缀（包含"."
string sourceFileType = sourcefileName.Remove(0, sourcefileName.LastIndexOf("."));
//设置输出文件完整路径，处理方式和加密运算一致，即存在则加数字
string desFileName = String.Format(@"{0}\{1}", directoryPath, sourceFileNameWithoutType);
string tempFileName = desFileName;
bool needChangeFileName = true;
int fileIndex = 0;
while (needChangeFileName)
{
if (File.Exists(String.Format("{0}{1}", desFileName, sourceFileNameWithoutType)))
{
desFileName = String.Format("{0}_{1}", tempFileName, ++fileIndex);
}
else
{
needChangeFileName = false;
}
}
//此处得到解密后文件路径
desFileName = String.Format("{0}{1}", desFileName, sourceFileType);
//实例化EncryptDecryptHelper
EncryptDecryptHelper edHelper = new EncryptDecryptHelper(filePath, desFileName, this.descpasswordTxt.Text.Trim(), cm);
//添加Stopwatch监测运行时间
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();//stopWatch开始监测
//开始加密，并得到结果rm
ResultMsg rm = edHelper.DescryptEncryptHandler(DescrptAndEncrypt.Descrpt);
stopWatch.Stop(); //stopWatch停止检测
TimeSpan ts = stopWatch.Elapsed; //得到stopWatch监测时间数据
StringBuilder sb = new StringBuilder();
//弹出消息框，告知运算结果
MessageBox.Show(rm.status ? "Succeed" : "Failure", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
if (rm.status)
{
sb.Append(String.Format("{4}{5}\r\nSource Filename:{0}\r\nDescrypted Filename:{1}\r\nCipherMode:{2}\r\nOperation time:{3}ms", sourcefileName, desFileName, CipherModeArray[CipherModeSelectedIndex], ts.TotalMilliseconds, this.ResultTxt.Text.Length == 0 ? "" : "\r\n\r\n", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
}
else
{
sb.Append(String.Format("{0}{1}\r\n{2}", this.ResultTxt.Text.Length == 0 ? "" : "\r\n\r\n", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), rm.msg));
}
if (ResultTxt.InvokeRequired)
{
ResultTxt.Invoke(new MethodInvoker(delegate { this.ResultTxt.Text += sb.ToString(); }));
}
});
}
}
