public void ShouldEncryptAndDecryptWithValidatedTag()
{
var testData = GetTestData();
// Perform encryption operation and assert
var encryptParam = new AeadModeBlockCipherParameters(
BlockCipherDirections.Encrypt,
testData.Nonce,
testData.Key,
testData.Payload,
testData.AssocData,
128
);
var encryptionResult = _newSubject.ProcessPayload(encryptParam);
Assert.IsTrue(encryptionResult.Success, $"{nameof(encryptionResult.Success)} Encrypt");
Assert.AreEqual(testData.CipherText, encryptionResult.Result, nameof(testData.CipherText));
// Validate the decryption operation / tag
var decryptParam = new AeadModeBlockCipherParameters(
BlockCipherDirections.Decrypt,
testData.Nonce,
testData.Key,
encryptionResult.Result,
testData.AssocData,
128
);
var decryptionResult = _newSubject.ProcessPayload(decryptParam);
Assert.IsTrue(decryptionResult.Success, $"{nameof(decryptionResult.Success)} Decrypt");
Assert.AreEqual(testData.Payload, decryptionResult.Result);
}
protected override BitString Mac(BitString macData)
{
var param = new AeadModeBlockCipherParameters(
BlockCipherDirections.Encrypt,
_keyConfirmationParameters.CcmNonce,
_keyConfirmationParameters.DerivedKeyingMaterial,
new BitString(0),
macData,
_keyConfirmationParameters.MacLength
);
var result = _ccm.ProcessPayload(param);
if (!result.Success)
{
throw new Exception(result.ErrorMessage);
}
return(result.Result);
}
public void AESGCM_XPNNewEngine()
{
BitString aad = new BitString("56d1dc66b2ae1c5c972aa1c22025c74b");
BitString plainText = new BitString("f15e9ceb86dd8309767c3f675eb5503c");
BitString key = new BitString("b9eac5c6 50daeab9 c15aec8d 362cfd1f ccef9d20 fe3c0e54 fd321554 8d203f0d");
BitString iv = new BitString("04527842 a98b3336 2a09067c");
BitString salt = new BitString("12345678 87654388 44888844");
BitString newIV;
newIV = iv.XOR(salt);
var param = new AeadModeBlockCipherParameters(BlockCipherDirections.Encrypt, newIV, key, plainText, aad, 128);
var encryptResult = _subject.ProcessPayload(param);
Assert.IsTrue(encryptResult.Success);
Assert.AreEqual(encryptResult.Tag, new BitString("e47971b2 c83ed28a d66fb896 2478d01f"), nameof(encryptResult.Tag));
var param2 = new AeadModeBlockCipherParameters(BlockCipherDirections.Decrypt, newIV, key, encryptResult.Result, aad, encryptResult.Tag);
var decryptResult = _subject.ProcessPayload(param2);
Assert.IsTrue(decryptResult.Success);
}