private BitString ConcatenatePieceOntoOtherInfo(string workingPiece)
{
BitString oi = new BitString(0);
if (workingPiece.Equals("uPartyInfo", StringComparison.OrdinalIgnoreCase))
{
if (_thisPartyKeyAgreementRole == KeyAgreementRole.InitiatorPartyU)
{
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_thisPartyOtherInfo.PartyId));
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_thisPartyOtherInfo.DkmNonce));
}
else
{
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_otherPartyOtherInfo.PartyId));
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_otherPartyOtherInfo.DkmNonce));
}
return(oi);
}
if (workingPiece.Equals("vPartyInfo", StringComparison.OrdinalIgnoreCase))
{
if (_thisPartyKeyAgreementRole == KeyAgreementRole.ResponderPartyV)
{
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_thisPartyOtherInfo.PartyId));
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_thisPartyOtherInfo.DkmNonce));
}
else
{
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_otherPartyOtherInfo.PartyId));
oi = oi.ConcatenateBits(BitString.GetAtLeastZeroLengthBitString(_otherPartyOtherInfo.DkmNonce));
}
return(oi);
}
if (workingPiece.Equals("counter", StringComparison.OrdinalIgnoreCase))
{
oi = oi.ConcatenateBits(new BitString(32).BitStringAddition(BitString.One()));
return(oi);
}
if (workingPiece.StartsWith("literal[", StringComparison.OrdinalIgnoreCase))
{
// remove the "literal[]" to get just the hex value
workingPiece = workingPiece.Replace("literal[", "").Replace("]", "");
oi = oi.ConcatenateBits(new BitString(workingPiece));
return(oi);
}
throw new ArgumentException(nameof(workingPiece));
}
private void GetDataFromPiece(Dictionary <string, BitString> fixedInfoParts, string workingPiece, FixedInfoParameter fixedInfoParameter)
{
if (workingPiece.Equals("uPartyInfo", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyU.PartyId)
.ConcatenateBits(
BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyU.EphemeralData)));
return;
}
if (workingPiece.Equals("uPartyId", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyU.PartyId));
return;
}
if (workingPiece.Equals("uEphemeralData", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyU.EphemeralData));
return;
}
if (workingPiece.Equals("vPartyInfo", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyV.PartyId)
.ConcatenateBits(
BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyV.EphemeralData)));
return;
}
if (workingPiece.Equals("vPartyId", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyV.PartyId));
return;
}
if (workingPiece.Equals("vEphemeralData", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.GetAtLeastZeroLengthBitString(fixedInfoParameter.FixedInfoPartyV.EphemeralData));
return;
}
if (workingPiece.Equals("L", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, BitString.To32BitString(fixedInfoParameter.L));
return;
}
if (workingPiece.Equals("salt", StringComparison.OrdinalIgnoreCase))
{
if (fixedInfoParameter.Salt?.BitLength > 0)
{
// We only want to add the salt to the fixed info when it isn't the default
if (fixedInfoParameter.Salt.ToPositiveBigInteger() == 0)
{
return;
}
fixedInfoParts.Add(workingPiece, fixedInfoParameter.Salt);
}
return;
}
if (workingPiece.Equals("iv", StringComparison.OrdinalIgnoreCase))
{
if (fixedInfoParameter.Iv?.BitLength > 0)
{
fixedInfoParts.Add(workingPiece, fixedInfoParameter.Iv);
}
return;
}
if (workingPiece.Equals("counter", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, new BitString(32).BitStringAddition(BitString.One()));
return;
}
if (workingPiece.Equals("algorithmId", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, fixedInfoParameter.AlgorithmId);
return;
}
if (workingPiece.Equals("label", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, fixedInfoParameter.Label);
return;
}
if (workingPiece.Equals("context", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, fixedInfoParameter.Context);
return;
}
if (workingPiece.Equals("t", StringComparison.OrdinalIgnoreCase))
{
fixedInfoParts.Add(workingPiece, fixedInfoParameter.T);
return;
}
if (workingPiece.StartsWith("literal[", StringComparison.OrdinalIgnoreCase))
{
// remove the "literal[]" to get just the hex value
workingPiece = workingPiece.Replace("literal[", "").Replace("]", "");
fixedInfoParts.Add(workingPiece, new BitString(workingPiece));
return;
}
if (workingPiece.StartsWith("entropyBits[", StringComparison.OrdinalIgnoreCase))
{
workingPiece = workingPiece.Replace("entropyBits[", "").Replace("]", "");
int.TryParse(workingPiece, out var result);
fixedInfoParts.Add("entropyBits", fixedInfoParameter.EntropyBits);
return;
}
throw new ArgumentException($"{nameof(workingPiece)}: {workingPiece}");
}
