public void button4_Click(object sender, EventArgs e)
{
// listBox1.Items.Add(" ");
listBox1.Items.Clear();
listBox1.Items.Add("textul criptat cu padding:");
string selectedItem = comboBox1.Items[comboBox1.SelectedIndex].ToString();
if (selectedItem == "aes")
{
using (Aes myAes = Aes.Create())
{
myAes.Padding = PaddingMode.ISO10126;
// Encrypt the string to an array of bytes.
byte[] encrypted = SymmetricAlgorithm.EncryptStringToBytes_Aes(listBox1.Items.ToString(), myAes.Key, myAes.IV);
// Decrypt the bytes to a string.
string roundtrip = SymmetricAlgorithm.DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV);
//Display the original data and the decrypted data.
// listBox1.Items.Clear();
for (int i = 0; i < 5; i++)
{
listBox1.Items.Add(encrypted);
}
}
}
else if (selectedItem == "cbc")
{
using (var random = new RNGCryptoServiceProvider())
{
var key = new byte[16];
random.GetBytes(key);
// Encrypt the string to an array of bytes.
byte[] encrypted = AnotherCipher.EncryptStringToBytes_Aes(listBox1.Items.ToString(), key);
// Decrypt the bytes to a string.
string roundtrip = AnotherCipher.DecryptStringFromBytes_Aes(encrypted, key);
//Display the original data and the decrypted data.
listBox1.Items.Add(Convert.ToBase64String(encrypted));
}
}
}
private void button3_Click(object sender, EventArgs e)
{
listBox1.Items.Add(" ");
listBox1.Items.Add("textul decriptat:");
string selectedItem = comboBox1.Items[comboBox1.SelectedIndex].ToString();
if (selectedItem == "aes")
{
using (Aes myAes = Aes.Create())
{
myAes.Key = key1;
myAes.IV = iv1;
string[] roundtrip = new string[count];
for (int i = 0; i < count; i++)
{ // Decrypt the bytes to a string.
roundtrip[i] = SymmetricAlgorithm.DecryptStringFromBytes_Aes(encrypted[i], myAes.Key, myAes.IV);
}
for (int i = 0; i < count; i++)
{
listBox1.Items.Add(roundtrip[i]);
}
}
}
else if (selectedItem == "cbc")
{
using (var random = new RNGCryptoServiceProvider())
{
// Decrypt the bytes to a string.
string[] roundtrip = new string[count];
for (int i = 0; i < count; i++)
{
roundtrip[i] = AnotherCipher.DecryptStringFromBytes_Aes(encrypted[i], key1);
}
for (int i = 0; i < count; i++)
{
listBox1.Items.Add(roundtrip[i]);
}
}
}
}