public void TestSecretKeyWrapperRoundTrip()
{
var secretKeyWrapper = new SecretKeyWrapper(context, UnitTestAlias);
var secretKeys = AesCbcWithIntegrity.GenerateKey();
var wrappedKey = secretKeyWrapper.EncryptedThenMac(secretKeys);
Assert.False(AesCbcWithIntegrity.KeyString(secretKeys) == wrappedKey);
var unwrappedKey = secretKeyWrapper.CheckMacAndDecrypt(wrappedKey);
Assert.True(AesCbcWithIntegrity.KeyString(secretKeys) == AesCbcWithIntegrity.KeyString(unwrappedKey));
}
public string EncryptedThenMac(AesCbcWithIntegrity.SecretKeys keys)
{
cipher.Init(CipherMode.EncryptMode, pair.Public);
var cipherText = cipher.DoFinal(Encoding.UTF8.GetBytes(AesCbcWithIntegrity.KeyString(keys)));
Signature s = Signature.GetInstance(HmacAlgorithm);
s.InitSign(pair.Private);
s.Update(cipherText);
byte [] signature = s.Sign();
return(string.Format("{0}:{1}", Convert.ToBase64String(signature), Convert.ToBase64String(cipherText)));
}