private static IssuerKeyAndParametersComposite UsePreComputeParameterSet(string uniqueIdentifier, byte[] attributeEncoding, string hash, string sessionID)
{
IssuerSetupParameters isp = new IssuerSetupParameters();
// pick the group construction (defaults to subgroup, but ECC is more efficient)
// TODOv2: Enable the UProve module to switch between ECC and subgroup based on ie. a config file.
// isp.GroupConstruction = GroupConstruction.ECC;
// right now, we need to use the subgroup construction to interop with Idemix
isp.GroupConstruction = GroupConstruction.Subgroup;
isp.ParameterSet = sessionDB[sessionID].parameterSet;
sessionDB[sessionID].group = isp.ParameterSet.Group;
sessionDB[sessionID].groupElement = isp.ParameterSet.Gd;
isp.UidH = hash;
// pick a unique identifier for the issuer params
isp.UidP = encoding.GetBytes(uniqueIdentifier);
// set the encoding parameters for the attributes
isp.E = attributeEncoding;
// specification field unused in ABC4Trust
isp.S = null;
// generate the serializable IssuerKeyAndParameters
IssuerKeyAndParameters ikap = isp.Generate(true);
IssuerKeyAndParametersComposite ikpc = new IssuerKeyAndParametersComposite();
ikpc.IssuerParameters = ConvertUtils.convertIssuerParameters(ikap.IssuerParameters);
ikpc.PrivateKey = ikap.PrivateKey.ToByteArray();
return(ikpc);
}
private static IssuerKeyAndParametersComposite UseCustomParameterSet(string uniqueIdentifier, byte[] attributeEncoding, string hash, string sessionID)
{
IssuerSetupParameters isp = new IssuerSetupParameters();
isp.GroupConstruction = GroupConstruction.Subgroup;
// pick a unique identifier for the issuer params
isp.UidP = encoding.GetBytes(uniqueIdentifier);
// set the encoding parameters for the attributes
isp.E = attributeEncoding;
isp.UseRecommendedParameterSet = false; // we don't use the recommended parameters
// specification field unused in ABC4Trust
isp.S = null;
// generate the serializable IssuerKeyAndParameters
IssuerKeyAndParameters ikap = isp.Generate(true);
sessionDB[sessionID].group = ikap.IssuerParameters.Gq;
sessionDB[sessionID].groupElement = ikap.IssuerParameters.Gd;
IssuerKeyAndParametersComposite ikpc = new IssuerKeyAndParametersComposite();
ikpc.IssuerParameters = ConvertUtils.convertIssuerParameters(ikap.IssuerParameters);
ikpc.PrivateKey = ikap.PrivateKey.ToByteArray();
return(ikpc);
}
private static IssuerKeyAndParametersComposite UsePreComputeParameterSet(string uniqueIdentifier, byte[] attributeEncoding, string hash, string sessionID)
{
IssuerSetupParameters isp = new IssuerSetupParameters();
// pick the group construction (defaults to subgroup, but ECC is more efficient)
// TODOv2: Enable the UProve module to switch between ECC and subgroup based on ie. a config file.
// isp.GroupConstruction = GroupConstruction.ECC;
// right now, we need to use the subgroup construction to interop with Idemix
isp.GroupConstruction = GroupConstruction.Subgroup;
isp.ParameterSet = sessionDB[sessionID].parameterSet;
sessionDB[sessionID].group = isp.ParameterSet.Group;
sessionDB[sessionID].groupElement = isp.ParameterSet.Gd;
isp.UidH = hash;
// pick a unique identifier for the issuer params
isp.UidP = encoding.GetBytes(uniqueIdentifier);
// set the encoding parameters for the attributes
isp.E = attributeEncoding;
// specification field unused in ABC4Trust
isp.S = null;
// generate the serializable IssuerKeyAndParameters
IssuerKeyAndParameters ikap = isp.Generate(true);
IssuerKeyAndParametersComposite ikpc = new IssuerKeyAndParametersComposite();
ikpc.IssuerParameters = ConvertUtils.convertIssuerParameters(ikap.IssuerParameters);
ikpc.PrivateKey = ikap.PrivateKey.ToByteArray();
return ikpc;
}
private static IssuerKeyAndParametersComposite UseCustomParameterSet(string uniqueIdentifier, byte[] attributeEncoding, string hash, string sessionID)
{
IssuerSetupParameters isp = new IssuerSetupParameters();
isp.GroupConstruction = GroupConstruction.Subgroup;
// pick a unique identifier for the issuer params
isp.UidP = encoding.GetBytes(uniqueIdentifier);
// set the encoding parameters for the attributes
isp.E = attributeEncoding;
isp.UseRecommendedParameterSet = false; // we don't use the recommended parameters
// specification field unused in ABC4Trust
isp.S = null;
// generate the serializable IssuerKeyAndParameters
IssuerKeyAndParameters ikap = isp.Generate(true);
sessionDB[sessionID].group = ikap.IssuerParameters.Gq;
sessionDB[sessionID].groupElement = ikap.IssuerParameters.Gd;
IssuerKeyAndParametersComposite ikpc = new IssuerKeyAndParametersComposite();
ikpc.IssuerParameters = ConvertUtils.convertIssuerParameters(ikap.IssuerParameters);
ikpc.PrivateKey = ikap.PrivateKey.ToByteArray();
return ikpc;
}
