public IssuerKeyAndParameters CreateIssuerSetupParameters(IssuerSetupParametersSpec spec)
{
IssuerSetupParameters isp = new IssuerSetupParameters();
isp.GroupConstruction = spec.GroupConstruction ?? GroupType.Subgroup;
isp.UidP = ExtensionMethods.ToByteArray(spec.IssuerID);
isp.E = spec.AttributeEncoding != null ? spec.AttributeEncoding : IssuerSetupParameters.GetDefaultEValues(spec.NumberOfAttributes);
isp.UseRecommendedParameterSet = spec.UseRecommendedParameterSet ?? true;
if (issuerStore.HasValue(spec.IssuerID) && spec.StoreOnServer)
{
ApiArgumentFault fault = new ApiArgumentFault();
fault.Details = "Issuer with unique ID was found";
fault.Argument = "IssuerSetupParametersSpec.ID";
fault.ArgumentValue = spec.ParameterSetName;
throw new FaultException <ApiArgumentFault>(fault);
}
// look up ParameterSet.
if (isp.UseRecommendedParameterSet)
{
isp.ParameterSet = IssuerSetupParameters.GetDefaultParameterSet(isp.GroupConstruction);
// XXX add a check here to see if the name of the default parameterset is that same as
// specified in spec.ParameterSetName and that match with the sha method specified.
}
else
{
ParameterSet pSet;
if (ParameterSet.TryGetNamedParameterSet(spec.ParameterSetName, out pSet))
{
isp.ParameterSet = pSet;
}
else
{
ApiArgumentFault fault = new ApiArgumentFault();
fault.Details = "Member value vas not found";
fault.Argument = "IssuerSetupParametersSpec.ParameterSetName";
fault.ArgumentValue = spec.ParameterSetName;
throw new FaultException <ApiArgumentFault>(fault);
}
}
// specification field unused in ABC4Trust
isp.S = null;
IssuerKeyAndParameters issuerKeyParam = isp.Generate(true);
if (spec.StoreOnServer)
{
issuerStore.AddValue(spec.IssuerID, issuerKeyParam);
}
return(issuerKeyParam);
}
public static void GetUProveParameters(
bool hashAttributes,
out ProverPresentationProtocolParameters proverParams,
out VerifierPresentationProtocolParameters verifierParams,
byte [] customTokenInformation = null,
byte [][] customAttributes = null,
GroupElement [] customGenerators = null,
byte [] customUidP = null
)
{
// Issuer setup
IssuerSetupParameters isp = new IssuerSetupParameters(maxNumberOfAttributes);
if (customUidP == null)
{
isp.UidP = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
}
else
{
isp.UidP = customUidP;
}
if (hashAttributes)
{
isp.E = _e1;
}
else
{
isp.E = _e0;
}
isp.S = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
if (customGenerators != null)
{
isp.ParameterSet = IssuerSetupParameters.GetDefaultParameterSet();
PrivateObject customParams = new PrivateObject(isp.ParameterSet);
customParams.SetField("G", customGenerators);
}
else
{
isp.UseRecommendedParameterSet = true;
}
IssuerKeyAndParameters ikap = isp.Generate();
IssuerParameters ip = ikap.IssuerParameters;
// Issuance
byte[][] attributes = new byte[][]
{
_encoding.GetBytes("Attribute 1"),
_encoding.GetBytes("Attribute 2"),
_encoding.GetBytes("Attribute 3"),
_encoding.GetBytes("Attribute 4")
};
if (customAttributes != null)
{
attributes = customAttributes;
}
byte[] tokenInformation = new byte[] { };
if (customTokenInformation != null)
{
tokenInformation = customTokenInformation;
}
byte[] proverInformation = new byte[] { };
int numberOfTokens = 1;
IssuerProtocolParameters ipp = new IssuerProtocolParameters(ikap);
ipp.Attributes = attributes;
ipp.NumberOfTokens = numberOfTokens;
ipp.TokenInformation = tokenInformation;
Issuer issuer = ipp.CreateIssuer();
FirstIssuanceMessage msg1 = issuer.GenerateFirstMessage();
ProverProtocolParameters ppp = new ProverProtocolParameters(ip);
ppp.Attributes = attributes;
ppp.NumberOfTokens = numberOfTokens;
ppp.TokenInformation = tokenInformation;
ppp.ProverInformation = proverInformation;
// ppp.BatchValidationSecurityLevel = -1;
Prover prover = ppp.CreateProver();
SecondIssuanceMessage msg2 = prover.GenerateSecondMessage(msg1);
ThirdIssuanceMessage msg3 = issuer.GenerateThirdMessage(msg2);
UProveKeyAndToken[] upkt = prover.GenerateTokens(msg3, true);
// Pseudonym
int[] disclosed = new int[0];
int[] committed = new int[] { 1, 3, 4, 2 };
byte[] message = _encoding.GetBytes("this is the presentation message, this can be a very long message");
byte[] scope = _encoding.GetBytes("scope");
//Generate prover
proverParams = new ProverPresentationProtocolParameters(ip, disclosed, message, upkt[0], attributes);
proverParams.Committed = committed;
//Generate verifier
verifierParams = new VerifierPresentationProtocolParameters(ip, disclosed, message, upkt[0].Token);
verifierParams.Committed = committed;
}
