public void testRoundTrip()
{
Sign1Message msg = new Sign1Message();
msg.AddAttribute(HeaderKeys.Algorithm, AlgorithmValues.ECDSA_256, Attributes.PROTECTED);
msg.SetContent(rgbContent);
msg.Sign(cnKeyPrivate);
byte[] rgbMsg = msg.EncodeToBytes();
msg = (Sign1Message)Message.DecodeFromBytes(rgbMsg, Tags.Sign1);
Boolean f = msg.Validate(cnKeyPublic);
Assert.AreEqual(f, (true));
}
public byte[] CreateMessage3()
{
CBORObject msg = CBORObject.NewArray();
if (_fSymmetricSecret)
{
msg.Add(6);
}
else
{
msg.Add(3);
}
msg.Add(_SessionId[1]);
byte[] aad_3 = ConcatenateAndHash(new byte[2][] { _LastMessageAuthenticator, msg.EncodeToBytes() }, _MessageDigest);
byte[] signBody = new byte[0];
if (!_fSymmetricSecret)
{
Sign1Message sign1 = new Sign1Message(false, false);
sign1.SetContent(aad_3);
sign1.AddAttribute(HeaderKeys.Algorithm, _algSign, Attributes.DO_NOT_SEND);
sign1.AddAttribute(HeaderKeys.KeyId, _SigningKey[CoseKeyKeys.KeyIdentifier], Attributes.UNPROTECTED);
sign1.Sign(_SigningKey);
CBORObject obj = CBORObject.NewArray();
obj.Add(sign1.EncodeToBytes());
signBody = obj.EncodeToBytes();
}
byte[][] encKeys = _DeriveKeys(_Keys, _SecretSalt, aad_3, _algAEAD);
Encrypt0Message enc = new Encrypt0Message(false);
enc.SetContent(signBody);
enc.SetExternalData(aad_3);
enc.AddAttribute(HeaderKeys.Algorithm, _algAEAD, Attributes.DO_NOT_SEND);
enc.AddAttribute(HeaderKeys.IV, CBORObject.FromObject(encKeys[1]), Attributes.DO_NOT_SEND);
enc.Encrypt(encKeys[0]);
msg.Add(enc.EncodeToBytes());
byte[] msgOut = msg.EncodeToBytes();
_LastMessageAuthenticator = ConcatenateAndHash(new byte[2][] { _LastMessageAuthenticator, msgOut }, _MessageDigest);
return(msgOut);
}
public byte[] CreateMessage2()
{
CBORObject msg = CBORObject.NewArray();
CBORObject obj;
if (_fSymmetricSecret)
{
msg.Add(5); // Msg Type
}
else
{
msg.Add(2);
}
msg.Add(_SessionId[1]); // S_U
msg.Add(_SessionId[0]); // S_V
msg.Add(_Nonce[0]); // N_V
msg.Add(_Keys[0].PublicKey().AsCBOR()); // E_V
msg.Add(_algKeyAgree); // HKDF_V
msg.Add(_algAEAD); // AEAD_V
if (!_fSymmetricSecret)
{
msg.Add(_algSign); // SIG_V
obj = CBORObject.NewArray();
obj.Add(AlgorithmValuesInt.ECDSA_256);
obj.Add(AlgorithmValues.EdDSA);
msg.Add(obj); // SIGs_V
}
if (_algKeyAgree.Equals(COSE.AlgorithmValues.ECDH_SS_HKDF_256))
{
_MessageDigest = new Sha256Digest();
}
byte[] data2 = msg.EncodeToBytes();
byte[] aad_2 = ConcatenateAndHash(new byte[2][] { _Messages[0], data2 }, _MessageDigest); // M00TODO - hash message[0] before passing it in.
byte[][] useKeys = _DeriveKeys(_Keys, _SecretSalt, aad_2, _algAEAD);
byte[] aeadKey = useKeys[0];
byte[] signResult = new byte[0];
if (!_fSymmetricSecret)
{
Sign1Message sign1 = new Sign1Message(false, false);
sign1.SetContent(aad_2);
sign1.AddAttribute(HeaderKeys.KeyId, _SigningKey[CoseKeyKeys.KeyIdentifier], Attributes.UNPROTECTED);
sign1.AddAttribute(HeaderKeys.Algorithm, _algSign, Attributes.DO_NOT_SEND);
sign1.Sign(_SigningKey);
signResult = sign1.EncodeToBytes();
}
Encrypt0Message enc0 = new Encrypt0Message(true);
enc0.AddAttribute(HeaderKeys.Algorithm, _algAEAD, Attributes.DO_NOT_SEND);
enc0.AddAttribute(HeaderKeys.IV, CBORObject.FromObject(useKeys[1]), Attributes.DO_NOT_SEND);
enc0.SetExternalData(aad_2);
CBORObject encContent = CBORObject.NewArray();
encContent.Add(signResult);
enc0.SetContent(encContent.EncodeToBytes());
enc0.Encrypt(aeadKey);
msg.Add(enc0.EncodeToCBORObject()); // COSE_ENC_2
_Messages[1] = msg.EncodeToBytes();
_LastMessageAuthenticator = ConcatenateAndHash(new byte[][] { _Messages[0], _Messages[1] }, _MessageDigest);
return(_Messages[1]);
}
