public static string EncryptedSHA(string inputDir)
{
string inputFile = inputDir.Split('\\').Last();
string hashFile = SHA512File(inputFile);
string encSHA = EncryptionAsym.RSAFile(hashFile, true, Constants.privKljuc, false, false);
return(encSHA);
}
public static string DecryptedSHA(string inputDir)
{
string inputFile = inputDir.Split('\\').Last();
string hashFile = inputFile + Constants.hashExtension;
Console.WriteLine(Constants.RSAEnc + hashFile);
string decSHA = EncryptionAsym.RSAFile(Constants.RSADec + hashFile, true, Constants.javKljuc, true, false);
return(decSHA);
}
private void btnEncryptSymmetricalKey_Click(object sender, EventArgs e)
{
try
{
string name = openFileDialog1.FileName.Split('\\').Last();
//if (openFileDialog1.)
name = EncryptionAsym.RSAFile(name, true, Constants.javKljuc, true, false);
MessageBox.Show("Generirana datoteka " + name);
}
catch (FileNotFoundException ex)
{
MessageBox.Show(ex.Message);
}catch (KriviUnosException ex)
{
MessageBox.Show(ex.Message);
}
}
private void btnDecryptSymmetricalKey_Click(object sender, EventArgs e)
{
try
{
string name = openFileDialog1.FileName.Split('\\').Last();
bool isAscii = checkIsAscii.Checked;
name = EncryptionAsym.RSAFile(name, true, Constants.privKljuc, false, isAscii);
MessageBox.Show("Generirana datoteka " + name);
}
catch (FileNotFoundException ex)
{
MessageBox.Show(ex.Message);
}
catch (KriviUnosException)
{
MessageBox.Show("Datoteka nije RSA enkriptirana");
}
}
public static bool CheckSignature(string name)
{
string fileName = name.Split('\\').Last();
if (!fileName.Contains(Constants.sigExt))
{
throw new KriviUnosException("Potrebno je označiti datoteku potpisa");
}
string file = fileName.Remove(fileName.LastIndexOf(Constants.sigExt));
string fileText = Utilities.readFile(file);
string hashCalc = Convert.ToBase64String(Hashing.SHA512String(fileText));
string hashDec = EncryptionAsym.RSAFile(fileName, false, "javniKljuc.txt", true, false);
byte[] hashDecBin = Convert.FromBase64String(hashDec);
hashDecBin = hashDecBin.Skip(Constants.RSAKeySize / 8 - Constants.hashSize / 8).ToArray();
hashDec = Convert.ToBase64String(hashDecBin);
return(hashDec == hashCalc);
}