private void RandomIVButton_Click(object sender, EventArgs e)
{
Log("生成随机初始向量：IV(64 bit)");
IV = Bitset.RandomGenerate(64);
IVText.Text = IV.ToString();
}
private void EncryptDecryptUserGuide(bool isDecrypt)
{
if (busy)
{
return;
}
string sourceType = isDecrypt ? "密文" : "明文";
string targetType = isDecrypt ? "明文" : "密文";
string operationType = isDecrypt ? "解密" : "加密";
try
{
MessageBox.Show("请选择" + sourceType + "文本。");
if (encryptFileDialog.ShowDialog() != DialogResult.OK)
{
return;
}
textBoxInputFile.Text = encryptFileDialog.FileName;
MessageBox.Show("请选择" + targetType + "存储位置。");
if (saveFileDialog.ShowDialog() != DialogResult.OK)
{
return;
}
textBoxOutputFile.Text = saveFileDialog.FileName;
if (Key == null)
{
MessageBox.Show("密钥尚未加载，请选择密钥。");
button2_Click(null, null);
if (Key == null)
{
return;
}
}
using (BinaryReader br = new BinaryReader(new FileStream(encryptFileDialog.FileName, FileMode.Open, FileAccess.Read)))
{
using (BinaryWriter bw = new BinaryWriter(new FileStream(saveFileDialog.FileName, FileMode.Create, FileAccess.Write)))
{
DESStream encryptStream = new DESStream(br, Key, bw, IV);
busy = true;
if (isDecrypt)
{
Log("开始解密");
encryptStream.Decrypt();
IV = encryptStream.IV;
IVText.Text = IV.ToString();
Log("解密结束");
}
else
{
Log("开始加密");
if (IV == null)
{
RandomIVButton_Click(null, null);
}
encryptStream.Encrypt();
Log("加密结束");
}
busy = false;
}
}
MessageBox.Show(operationType + "成功。");
}
catch (FileNotFoundException)
{
MessageBox.Show("错误：文件未找到");
MessageBox.Show(operationType + "失败。");
}
catch (IOException)
{
MessageBox.Show("错误：文件读写发生错误");
MessageBox.Show(operationType + "失败。");
}
}