private void buttonEncryptAes_Click(object sender, EventArgs e)
{
alice.plaintext = textBoxPlainTextAlice.Text;
if (!string.IsNullOrEmpty(alice.plaintext) && alice.BytesSessionkey != null)
{
if (aesMode == CipherMode.OFB)
{
//работает только в bouncyCastle
// Encrypt the string to an array of bytes.
byte[] encrypted = AES_bouncy_OFB.encrypt(alice.plaintext, alice.BytesSessionkey);//AES.EncryptStringToBytes_Aes(alice.plaintext, alice.BytesSessionkey);
alice.encryptedMessage = Convert.ToBase64String(encrypted);
alice.encryptedMessageBytes = encrypted;
textBoxEncryptedMessageAlice.Text = alice.encryptedMessage;
}
else
{
//byte[] bytesKey = Encoding.UTF8.GetBytes(sessionkey);
// Encrypt the string to an array of bytes.
byte[] encrypted = AES.EncryptStringToBytes_Aes(alice.plaintext, alice.BytesSessionkey);
alice.encryptedMessage = Convert.ToBase64String(encrypted);
alice.encryptedMessageBytes = encrypted;
textBoxEncryptedMessageAlice.Text = alice.encryptedMessage;
}
}
else
{
MessageBox.Show("plaintext or session key empty");
}
}
internal string decryptMessage(CipherMode aesMode)
{
if (aesMode == CipherMode.OFB)
{
var res = AES_bouncy_OFB.decrypt(encryptedMessageBytes, decryptedSessionKeyBytes);
decryptedMessage = res;
return(res);
}
else
{
var res = AES.DecryptStringFromBytes_Aes(encryptedMessageBytes, decryptedSessionKeyBytes);
decryptedMessage = res;
return(res);
}
}