private void signatureVerifyBtn_Click(object sender, EventArgs e)
{
var ready = true;
if (string.IsNullOrWhiteSpace(signatureVerifySignatureFile.Text))
{
MessageBox.Show("Choose a signature file", "Choose a signature file", MessageBoxButtons.OK,
MessageBoxIcon.Warning);
ready = false;
}
if (string.IsNullOrWhiteSpace(signatureVerifyPublicKey.Text))
{
signatureVerifyPublicKey.Text = _initialDirectory + "RSA_public.txt";
}
if (ready)
{
var verified = DigitalSignature.VerifySignature(signatureVerifySignatureFile.Text, int.Parse(rsaKeysSize.Text),
signatureVerifyPublicKey.Text);
if (verified)
{
MessageBox.Show("Sender is verified", "Verified", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("Sender is not verified", "Not verified", MessageBoxButtons.OK,
MessageBoxIcon.Warning);
}
}
}
private void signatureCreateSignature_Click(object sender, EventArgs e)
{
var ready = true;
if (string.IsNullOrWhiteSpace(signatureSignPlain.Text))
{
MessageBox.Show("Choose a plain text file", "Choose a plain text file", MessageBoxButtons.OK,
MessageBoxIcon.Warning);
ready = false;
}
if (string.IsNullOrWhiteSpace(signatureSignPrivateKey.Text))
{
signatureSignPrivateKey.Text = _initialDirectory + "RSA_private.txt";
}
if (string.IsNullOrWhiteSpace(signatureSignSignature.Text))
{
signatureSignSignature.Text = _initialDirectory + "Signature.txt";
}
if (ready)
{
DigitalSignature.CreateSignature(signatureSignPlain.Text, int.Parse(rsaKeysSize.Text),
signatureSignPrivateKey.Text, signatureSignSignature.Text);
}
}
public static void CreateSignedEnvelope(string plainTextFile, int keySize, string receiverPublicKeyFilePath,
string senderPrivateKeyFilePath, string outputFilePath)
{
var tmpEnvelopeFilePath = Environment.CurrentDirectory + @"\Files\tmp\envelope_tmp.txt";
DigitalEnvelope.CreateEnvelope(plainTextFile, keySize, receiverPublicKeyFilePath,
tmpEnvelopeFilePath);
DigitalSignature.CreateEnvelopeSignature(tmpEnvelopeFilePath, keySize, senderPrivateKeyFilePath,
outputFilePath);
}
public static bool OpenSignedEnvelope(string signedEnvelopeFilePath, int keySize,
string receiverPrivateKeyFilePath, string senderPublicKeyFilePath, string outputFilePath)
{
var verified = DigitalSignature.VerifyEnvelopeSignature(signedEnvelopeFilePath, keySize,
senderPublicKeyFilePath);
var file = FileOperations.ReadFromTextFile(signedEnvelopeFilePath);
var fileSplit = file.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
var keyBytes = Converter.HexStringToBytes(fileSplit[4]);
var messageBytes = Converter.HexStringToBytes(fileSplit[6]);
DigitalEnvelope.ReadEnvelope(keyBytes, messageBytes, keySize, receiverPrivateKeyFilePath, outputFilePath);
return(verified);
}