/// <summary>
/// Make and return a license for the given <seealso cref="LicenseData"/>. </summary>
/// <param name="licenseData">
/// @return </param>
/// <exception cref="LicenseGeneratorException"> If the generation encounters an error, usually due to invalid input. </exception>
/// <exception cref="IllegalStateException"> If the generator is not setup correctly to make licenses. </exception>
public string makeLicense(LicenseData licenseData)
{
if (!CanMakeLicenses)
{
throw new System.InvalidOperationException("The LicenseGenerator cannot make licenses as it was not configured with a private key");
}
try
{
//
var dsa = SignerUtilities.GetSigner("SHA1withDSA");
dsa.Init(true, privateKey);
//
string stringData = licenseData.toLicenseStringData();
byte[] licBytes = Encoding.UTF8.GetBytes(stringData);
dsa.BlockUpdate(licBytes, 0, licBytes.Length);
//
byte[] signed = dsa.GenerateSignature();
string license = ToLicenseKey(signed);
return(license);
}
catch (Exception e)
{
throw new LicenseGeneratorException(e);
}
}
/// <summary>
/// Verify the given license for the given <seealso cref="LicenseData"/>. </summary>
/// <param name="licenseData"> </param>
/// <param name="license"> </param>
/// <returns> Whether the license verified successfully. </returns>
/// <exception cref="LicenseGeneratorException"> If the verification encounters an error, usually due to invalid input. You MUST check the return value of this method if no exception is thrown. </exception>
/// <exception cref="IllegalStateException"> If the generator is not setup correctly to verify licenses. </exception>
public virtual bool verifyLicense(LicenseData licenseData, string license)
{
if (!CanVerifyLicenses)
{
throw new System.InvalidOperationException("The LicenseGenerator cannot verify licenses as it was not configured with a public key");
}
try
{
//Signature dsa = Signature.getInstance("SHA1withDSA", "SUN");
var dsa = SignerUtilities.GetSigner("SHA1withDSA");
dsa.Init(false, publicKey);
//
string stringData = licenseData.toLicenseStringData();
byte[] msgBytes = Encoding.UTF8.GetBytes(stringData);
dsa.BlockUpdate(msgBytes, 0, msgBytes.Length);
var dec = FromLicenseKey(license);
var retVal = dsa.VerifySignature(dec);
//
return(retVal);
}
catch (InvalidKeyException e)
{
throw new LicenseGeneratorException(e);
}
catch (SignatureException e)
{
throw new LicenseGeneratorException(e);
}
catch (Exception e)
{
throw new LicenseGeneratorException(e);
}
}