public IIfcSecretKeyingMaterial Build(IfcScheme scheme, KasMode kasMode, KeyAgreementRole thisPartyKeyAgreementRole,
KeyConfirmationRole keyConfirmationRole, KeyConfirmationDirection keyConfirmationDirection,
bool shouldValidateContributions = true)
{
if (shouldValidateContributions)
{
var generationRequirements = KeyGenerationRequirementsHelper.GetKeyGenerationOptionsForSchemeAndRole(
scheme, kasMode, thisPartyKeyAgreementRole, keyConfirmationRole, keyConfirmationDirection);
ValidateNonce(generationRequirements);
ValidateKey(generationRequirements);
ValidatePartyId(generationRequirements);
ValidateK(generationRequirements, scheme);
}
return(new IfcSecretKeyingMaterial()
{
C = _c,
DkmNonce = _dkmNonce,
K = _k,
Key = _key,
PartyId = _partyId,
Z = _z,
});
}
/// <summary>
/// Validates the "k" is provided when party U for KTS scheme.
/// </summary>
/// <param name="generationRequirements">The generation requirements for this party and scheme.</param>
/// <param name="scheme">The scheme utilized for the KAS/KTS.</param>
/// <exception cref="ArgumentNullException">Throw when required value is not provided.</exception>
private void ValidateK(SchemeKeyNonceGenRequirement generationRequirements, IfcScheme scheme)
{
var ktsSchemes = new[] { IfcScheme.Kts_oaep_basic, IfcScheme.Kts_oaep_partyV_keyConfirmation };
if (generationRequirements.ThisPartyKasRole == KeyAgreementRole.InitiatorPartyU && ktsSchemes.Contains(scheme) && _k?.BitLength == 0)
{
throw new ArgumentNullException($"{nameof(_key.PubKey)} cannot be null for this party and scheme.");
}
}
public KasAlgoAttributesIfc(IfcScheme scheme, int modulo, int l)
{
Scheme = scheme;
Modulo = modulo;
L = l;
}