/// <summary>
/// EBC模式解密
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_EBCDecrypt_Click(object sender, RoutedEventArgs e)
{
if (textBox.Text == string.Empty)
{
System.Windows.MessageBox.Show("请选择待加密或解密的文件！！", "提示");
return;
}
else
{
Secretkey secretket_form = new Secretkey();
if (secretket_form.ShowDialog().Value == true)
{
SM4Utils sm4 = new SM4Utils();
//sm4.secretKey = "JeF8U9wHFOMfs2Y8";//密钥
sm4.secretKey = Keyto16bytes(secretket_form.key);
sm4.hexString = false;
byte[] bytedata;
bytedata = FiletoByte(textBox.Text);
string plain_data = sm4.Decrypt_ECB(Encoding.Default.GetString(bytedata));
if (plain_data == string.Empty)
{
System.Windows.MessageBox.Show("输入的密钥不正确！！", "提示");
return;
}
else
{
byte[] plain_bytedata = Encoding.Default.GetBytes(plain_data);
string extension = System.IO.Path.GetExtension(textBox.Text);
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "保存解密文件";
sfd.Filter = "All files|*" + extension;
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
FileStream fs = new FileStream(sfd.FileName, FileMode.Create, FileAccess.Write);
fs.Write(plain_bytedata, 0, plain_bytedata.Length);
textBox_DePath.Clear();
textBox_DePath.AppendText(" 解密文件路径：" + sfd.FileName);
fs.Close();
System.Windows.MessageBox.Show("已成功解密文件！！", "提示");
}
else
{
System.Windows.MessageBox.Show("请保存明文文件！！", "提示");
return;
}
}
}
else
{
System.Windows.MessageBox.Show("请输入并确认密钥！！", "提示");
return;
}
}
}
/// <summary>
/// CBC模式加密
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_CBCEncrypt_Click(object sender, RoutedEventArgs e)
{
if (textBox.Text == string.Empty)
{
System.Windows.MessageBox.Show("请选择待加密或解密的文件！！", "提示");
return;
}
else
{
Secretkey secretket_form = new Secretkey();
if (secretket_form.ShowDialog().Value == true)
{
SM4Utils sm4 = new SM4Utils();
//sm4.secretKey = "JeF8U9wHFOMfs2Y8";
sm4.secretKey = Keyto16bytes(secretket_form.key);
sm4.hexString = false;
tempiv = GetRandomString(16, true, true, true, false, null).ToLower();
sm4.iv = tempiv;
//sm4.iv = "UISwD9fW6cFh9SNS";
byte[] bytedata;
bytedata = FiletoByte(textBox.Text);
string cipher_data = sm4.Encrypt_CBC(Encoding.Default.GetString(bytedata));
string cipher_data_iv = sm4.iv + cipher_data;
byte[] cipher_bytedata = Encoding.Default.GetBytes(cipher_data);
byte[] cipher_bytedata_iv = Encoding.Default.GetBytes(cipher_data_iv);
string extension = System.IO.Path.GetExtension(textBox.Text);
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "保存加密文件";
sfd.Filter = "All files|*" + extension;
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
FileStream fs = new FileStream(sfd.FileName, FileMode.Create, FileAccess.Write);
fs.Write(cipher_bytedata_iv, 0, cipher_bytedata_iv.Length);
textBox_EnPath.Clear();
textBox_EnPath.AppendText(" 加密文件路径：" + sfd.FileName);
fs.Close();
System.Windows.MessageBox.Show("已成功加密文件！！", "提示");
}
else
{
System.Windows.MessageBox.Show("请保存密文文件！！", "提示");
return;
}
}
else
{
System.Windows.MessageBox.Show("请输入一个密钥以用于加密！！", "提示");
return;
}
}
}
