public void Der()
{
if (Environment.OSVersion.Platform == PlatformID.Unix)
return; // No DLLs on Unix
// TODO: Conditional compilation for mono compability
byte[] publicKeyDER = Resources.GetResource("RSACryptoServiceProviderExtensionPublicKey.der");
byte[] privateKeyDER = Resources.GetResource("RSACryptoServiceProviderExtensionPrivateKey.der");
Console.WriteLine("Public key:\n{0}\n", BitConverter.ToString(publicKeyDER).Replace("-", ""));
Console.WriteLine("Private key:\n{0}\n", BitConverter.ToString(privateKeyDER).Replace("-", ""));
byte[] signature;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.PersistKeyInCsp = false;
rsa.ImportPrivateKeyDer(privateKeyDER);
using (var sha1 = new SHA1CryptoServiceProvider())
signature = rsa.SignData(DataToSign, sha1);
}
using (var rsa = new RSACryptoServiceProvider())
{
rsa.PersistKeyInCsp = false;
rsa.ImportPublicKeyDer(publicKeyDER);
bool isValidSignature;
using (var sha1 = new SHA1CryptoServiceProvider())
isValidSignature = rsa.VerifyData(DataToSign, sha1, signature);
Assert.IsTrue(isValidSignature);
// invalidate signature so the next check must fail
signature[signature.Length - 1] ^= 0xFF;
using (var sha1 = new SHA1CryptoServiceProvider())
isValidSignature = rsa.VerifyData(DataToSign, sha1, signature);
Assert.IsFalse(isValidSignature);
}
}