private void button2_Click(object sender, EventArgs e)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
string privateKey = CWRFiles.ReadWrite.ReadFromFile("private_keyRSA");
rsa.FromXmlString(privateKey);
Signature.Signature signature = new Signature.Signature(rsa);
string message = CWRFiles.ReadWrite.ReadFromFile("plain_text");
byte[] messagetoByte = System.Text.Encoding.UTF8.GetBytes(message);
byte[] hashValue = Signature.Hash.ComputeHashForMessage(messagetoByte);
string Hash = System.Convert.ToBase64String(hashValue);
string signatureFromFile = CWRFiles.ReadWrite.ReadFromFile("signature");
if (Hash == null || signatureFromFile == null)
{
MessageBox.Show("Hash ili potpis ne postoje!");
}
else
{
byte[] byteHash = System.Convert.FromBase64String(Hash);
byte[] byteSignature = System.Convert.FromBase64String(signatureFromFile);
if (signature.veritifySignature(byteHash, byteSignature))
{
MessageBox.Show("Potpis je ispravan!");
}
else
{
MessageBox.Show("Potpis nije ispravan!");
}
}
}
private void btnSignature_Click(object sender, EventArgs e)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
string privateKey = CWRFiles.ReadWrite.ReadFromFile("private_keyRSA");
rsa.FromXmlString(privateKey);
Signature.Signature signature = new Signature.Signature(rsa);
string message = CWRFiles.ReadWrite.ReadFromFile("plain_text");
byte[] messagetoByte = System.Text.Encoding.UTF8.GetBytes(message);
byte[] hashForSignature = Signature.Hash.ComputeHashForMessage(messagetoByte);
byte[] signature1 = signature.CreateSignature(hashForSignature);
CWRFiles.ReadWrite.WriteToFile(System.Convert.ToBase64String(signature1), "signature");
txtSignature.Text = System.Convert.ToBase64String(signature1);
}
