private void buttonSign_Click(object sender, EventArgs e)
{
string privateKey = textBoxPrivateKey.Text;
if (string.IsNullOrEmpty(privateKey) == false)
{
string accountName = textBoxAccountName.Text;
string accountNumber = textBoxAccountNumber.Text;
if (string.IsNullOrEmpty(accountName) == false)
{
if (string.IsNullOrEmpty(accountNumber) == false)
{
string inputData = accountName + accountNumber;
textBoxSignature.Text = DigitalSignatureHelper.CreateSignature(inputData, privateKey);
}
else
{
MessageBox.Show("AccountNumber is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show("AccountName is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show("Private Key is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
private void buttonGetPublicKey_Click(object sender, EventArgs e)
{
string privateKey = textBoxPrivateKey.Text;
if (string.IsNullOrEmpty(privateKey) == false)
{
textBoxPublicKey.Text = DigitalSignatureHelper.GetPublicKey(privateKey);
}
else
{
MessageBox.Show("Private Key is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
private void buttonGenerateKey_Click(object sender, EventArgs e)
{
textBoxPrivateKey.Text = DigitalSignatureHelper.GeneratePrivateKey();
mIsSaved = false;
}
private void buttonVerify_Click(object sender, EventArgs e)
{
string publicKey = textBoxPublicKey.Text;
if (string.IsNullOrEmpty(publicKey) == false)
{
string signature = textBoxSignature.Text;
if (string.IsNullOrEmpty(signature) == false)
{
string accountName = textBoxAccountName.Text;
string accountNumber = textBoxAccountNumber.Text;
if (string.IsNullOrEmpty(accountName) == false)
{
if (string.IsNullOrEmpty(accountNumber) == false)
{
string inputData = accountName + accountNumber;
var verifyResult = false;
try
{
verifyResult = DigitalSignatureHelper.VerifySignature(inputData, signature, publicKey);
}
catch (SecurityException ex)
{
MessageBox.Show(ex.Message, "Verify", MessageBoxButtons.OK, MessageBoxIcon.Warning);
verifyResult = false;
}
catch (Exception ex)
{
string errorMsg = string.Format("Verify process failed!\n{0}", ex.Message);
MessageBox.Show(errorMsg, "Verify", MessageBoxButtons.OK, MessageBoxIcon.Error);
verifyResult = false;
}
if (verifyResult == true)
{
MessageBox.Show("Signature good", "Verify", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
else
{
MessageBox.Show("AccountNumber is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show("AccountName is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show("Signature is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show("Public Key is empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}