private void button2_Click(object sender, EventArgs e)
{
string fileresult = "";
FileStream myStream = new FileStream(find.Text, FileMode.Open, FileAccess.Read); //打开文件，把文件读取到string变量
StreamReader myStreamReader = new StreamReader(find.Text, System.Text.Encoding.Default);
string fileContent;
fileContent = myStreamReader.ReadToEnd();
myStreamReader.Close();
if (find.Text.Trim() != string.Empty)
{
if (key.Text.Trim() != string.Empty)
{
if (DES.Checked == true)
{
fileresult = DEScipher.Decrypt(fileContent, key.Text);
}
else if (AES.Checked == true)
{
//byte[] encryptB = Encoding.UTF8.GetBytes(ciphertext1.ToString());
byte[] decryptBytes = AEScipher.AESDecrypt(encryptBytes, key.Text);
fileresult = Encoding.UTF8.GetString(decryptBytes);
}
else if ((test.Checked == true) && (m.Text.Trim() != string.Empty) && (int.Parse(m.Text) >= 3))
{
fileresult = NDes.NDes.NDESDecrypt(fileContent, key.Text, m.Text);
}
}
else
{
MessageBox.Show(this, "Please Input the Key！", "Tips", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show(this, "Please choose the file to be decrypt！", "Tips", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
FileStream myStreamr = new FileStream(save.Text, FileMode.Create, FileAccess.Write); //创建一个文件，把字符串写入文件
StreamWriter myStreamWriter = new StreamWriter(myStreamr);
myStreamWriter.Write(fileresult);
myStreamWriter.Close();
}
private void Decrypt_Click(object sender, EventArgs e)
{
if (DES.Checked == false && AES.Checked == false && test.Checked == false)
{
MessageBox.Show("You must choose a cipher method!", "Oops!", MessageBoxButtons.YesNo, MessageBoxIcon.Hand);
}
else if (key.Text == null)
{
MessageBox.Show("You must enter decryption key!", "Oops!", MessageBoxButtons.YesNo, MessageBoxIcon.Hand);
}
else
{
if (ciphertext.Text == null)
{
MessageBox.Show("Please enter the text need to be decrypt.", "Tips", MessageBoxButtons.YesNo, MessageBoxIcon.Hand);
}
else
{
if (DES.Checked == true)
{
plaintext1.Text = DEScipher.Decrypt(ciphertext.Text, key.Text);
}
else if (AES.Checked == true)
{
//byte[] encryptB = Encoding.UTF8.GetBytes(ciphertext1.ToString());
byte[] decryptBytes = AEScipher.AESDecrypt(encryptBytes, key.Text);
plaintext1.Text = Encoding.UTF8.GetString(decryptBytes);
}
else if ((test.Checked == true) && (m != null) && (int.Parse(m.Text.ToString()) >= 3))
{
string decipherresult_ndes = NDes.NDes.NDESDecrypt(ciphertext.Text, key.Text, m.Text);
plaintext1.Text = decipherresult_ndes;
}
}
}
}
private void detext_Click(object sender, EventArgs e)
{
if (name.SelectedItem.ToString() == "RSA")
{
Key.Text = skey[1];
Plaintext.Text = RSAcipher.DecryptString(Cyphertext.Text, skey[1]);
}
if (Cyphertext.Text.Trim() != string.Empty)
{
if (Key.Text.Trim() != string.Empty)
{
if (name.SelectedItem.ToString() == "Caesar cipher")
{
int k = Convert.ToInt32(this.Key.Text);
Plaintext.Text = Caecar.Caecarcipher.DeCaesar(Cyphertext.Text, k);
}
else if (name.SelectedItem.ToString() == "DES")
{
Plaintext.Text = DEScipher.Decrypt(Cyphertext.Text, Key.Text);
}
else if (name.SelectedItem.ToString() == "Permutation cipher")
{
if (order.Text.ToString() != string.Empty)
{
Plaintext.Text = permutation.permutationcipher.decrypt(Cyphertext.Text, order.Text, Convert.ToInt32(Key.Text));
}
else
{
MessageBox.Show(this, "请输入密钥顺序！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else if (name.SelectedItem.ToString() == "AutoKey cipher")
{
Plaintext.Text = Autokeycipher.decryption(Cyphertext.Text, Key.Text);
}
else if (name.SelectedItem.ToString() == "Keyword cipher")
{
Plaintext.Text = Keywordcipher.decrypt(Cyphertext.Text, Key.Text);
}
else if (name.SelectedItem.ToString() == "Vigenere cipher")
{
Plaintext.Text = Vigenere.Vigenere.decrypt(Cyphertext.Text, Key.Text);
}
else if (name.SelectedItem.ToString() == "Playfair cipher")
{
Plaintext.Text = playfair.Program.Decrypt(Cyphertext.Text, Key.Text);
}
else if (name.SelectedItem.ToString() == "CA")
{
if (order.Text.ToString() != string.Empty)
{
Plaintext.Text = CA.CA.decrypt(Cyphertext.Text, order.Text, Convert.ToInt32(Key.Text));
}
else
{
MessageBox.Show(this, "请输入二进制密钥流！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else if (name.SelectedItem.ToString() == "Column cipher")
{
Plaintext.Text = Column.Column.decrypt(Cyphertext.Text, Key.Text);
}
}
else
{
MessageBox.Show(this, "请输入密钥！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show(this, "请输入要解密的文本！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}