public void DevicePseudonymTest()
{
// Issuer setup
IssuerSetupParameters isp = new IssuerSetupParameters();
isp.UidP = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
isp.E = new byte[] { (byte)1, (byte)1, (byte)1, (byte)1 };
isp.UseRecommendedParameterSet = true;
isp.S = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
IssuerKeyAndParameters ikap = isp.Generate(true);
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") };
byte[] tokenInformation = new byte[] { };
byte[] proverInformation = new byte[] { };
int numberOfTokens = 1;
IDevice device = new VirtualDevice(ip);
GroupElement hd = device.GetDevicePublicKey();
IssuerProtocolParameters ipp = new IssuerProtocolParameters(ikap);
ipp.Attributes = attributes;
ipp.NumberOfTokens = numberOfTokens;
ipp.TokenInformation = tokenInformation;
ipp.DevicePublicKey = hd;
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.DevicePublicKey = hd;
Prover prover = ppp.CreateProver();
SecondIssuanceMessage msg2 = prover.GenerateSecondMessage(msg1);
ThirdIssuanceMessage msg3 = issuer.GenerateThirdMessage(msg2);
UProveKeyAndToken[] upkt = prover.GenerateTokens(msg3);
// Pseudonym
int[] disclosed = new int[0];
byte[] message = encoding.GetBytes("this is the presentation message, this can be a very long message");
byte[] messageForDevice = encoding.GetBytes("message for Device");
byte[] scope = encoding.GetBytes("scope");
PresentationProof proof;
FieldZqElement[] tildeO;
// Valid presentation
IDevicePresentationContext deviceCtx = device.GetPresentationContext();
proof = PresentationProof.Generate(ip, disclosed, null, PresentationProof.DeviceAttributeIndex, scope, message, messageForDevice, deviceCtx, upkt[0], attributes, out tildeO);
proof.Verify(ip, disclosed, null, PresentationProof.DeviceAttributeIndex, scope, message, messageForDevice, upkt[0].Token);
// Invalid pseudonym (wrong scope)
deviceCtx = device.GetPresentationContext();
proof = PresentationProof.Generate(ip, disclosed, null, PresentationProof.DeviceAttributeIndex, scope, message, messageForDevice, deviceCtx, upkt[0], attributes, out tildeO);
try { proof.Verify(ip, disclosed, null, PresentationProof.DeviceAttributeIndex, encoding.GetBytes("bad scope"), message, messageForDevice, upkt[0].Token); Assert.Fail(); }
catch (InvalidUProveArtifactException) { }
// Ensure tildeO is correct, in this case it should be empty because there are no comitted attributes
Assert.IsTrue(tildeO == null || tildeO.Length == 0);
}
public void ProtocolTest()
{
Stopwatch sw = new Stopwatch();
sw.Start();
bool[] bools = new bool[] { true, false };
foreach (bool isSubgroupConstruction in bools)
{
foreach (bool supportDevice in bools)
{
var vectors =
supportDevice ?
(isSubgroupConstruction ?
GetTestVectors("testvectorssubgroup_Device_doc.txt")
:
GetTestVectors("testvectorsEC_Device_doc.txt"))
:
(isSubgroupConstruction ?
GetTestVectors("testvectorssubgroup_doc.txt")
:
GetTestVectors("testvectorsEC_doc.txt"));
IssuerKeyAndParameters ikap = LoadIssuerKeyAndParameters(isSubgroupConstruction, vectors["GroupName"], supportDevice, vectors);
FieldZq Zq = ikap.IssuerParameters.Zq;
// replace random y0/g0 with test vector values
ikap.PrivateKey = Zq.GetElement(HexToBytes(vectors["y0"]));
ikap.IssuerParameters.G[0] = CreateGroupElement(ikap.IssuerParameters.Gq, vectors["g0"]);
Assert.AreEqual(ikap.IssuerParameters.G[0], ikap.IssuerParameters.Gq.G.Exponentiate(ikap.PrivateKey), "g0 computation");
IssuerParameters ip = ikap.IssuerParameters;
ip.Verify();
/*
* issuance
*/
byte[][] A = new byte[][] {
HexToBytes(vectors["A1"]),
HexToBytes(vectors["A2"]),
HexToBytes(vectors["A3"]),
HexToBytes(vectors["A4"]),
HexToBytes(vectors["A5"])
};
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["x1"])), ProtocolHelper.ComputeXi(ip, 0, A[0]), "x1");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["x2"])), ProtocolHelper.ComputeXi(ip, 1, A[1]), "x2");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["x3"])), ProtocolHelper.ComputeXi(ip, 2, A[2]), "x3");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["x4"])), ProtocolHelper.ComputeXi(ip, 3, A[3]), "x4");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["x5"])), ProtocolHelper.ComputeXi(ip, 4, A[4]), "x5");
byte[] TI = HexToBytes(vectors["TI"]);
Assert.IsTrue(HexToBytes(vectors["P"]).SequenceEqual(ip.Digest(supportDevice)), "P");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["xt"])), ProtocolHelper.ComputeXt(ip, TI, supportDevice), "xt");
IDevice device = null;
GroupElement hd = null;
if (supportDevice)
{
device = new VirtualDevice(ip, Zq.GetElement(HexToBytes(vectors["xd"])), Zq.GetElement(HexToBytes(vectors["wdPrime"])));
IDevicePresentationContext context = device.GetPresentationContext();
// Test device responses
Assert.AreEqual(CreateGroupElement(ip.Gq, vectors["hd"]), device.GetDevicePublicKey(), "hd");
Assert.AreEqual(CreateGroupElement(ip.Gq, vectors["ad"]), context.GetInitialWitness(), "ad");
Assert.AreEqual(Zq.GetElement(HexToBytes(vectors["rdPrime"])), context.GetDeviceResponse(HexToBytes(vectors["md"]), HexToBytes(vectors["mdPrime"]), ip.HashFunctionOID), "rdPrime");
hd = CreateGroupElement(ip.Gq, vectors["hd"]);
}
IssuerProtocolParameters ipp = new IssuerProtocolParameters(ikap);
ipp.Attributes = A;
ipp.NumberOfTokens = 1;
ipp.TokenInformation = TI;
ipp.DevicePublicKey = hd;
ipp.PreGeneratedW = new FieldZqElement[] { Zq.GetElement(HexToBytes(vectors["w"])) };
Issuer issuer = ipp.CreateIssuer();
byte[] PI = HexToBytes(vectors["PI"]);
ProverProtocolParameters ppp = new ProverProtocolParameters(ip);
ppp.Attributes = A;
ppp.NumberOfTokens = 1;
ppp.TokenInformation = TI;
ppp.ProverInformation = PI;
ppp.DevicePublicKey = hd;
ppp.ProverRandomData = new ProverRandomData(
new FieldZqElement[] { Zq.GetElement(HexToBytes(vectors["alpha"])) },
new FieldZqElement[] { Zq.GetElement(HexToBytes(vectors["beta1"])) },
new FieldZqElement[] { Zq.GetElement(HexToBytes(vectors["beta2"])) });
Prover prover = ppp.CreateProver();
FirstIssuanceMessage msg1 = issuer.GenerateFirstMessage();
Assert.AreEqual(msg1.sigmaZ, CreateGroupElement(ip.Gq, vectors["sigmaZ"]), "sigmaZ");
Assert.AreEqual(msg1.sigmaA[0], CreateGroupElement(ip.Gq, vectors["sigmaA"]), "sigmaA");
Assert.AreEqual(msg1.sigmaB[0], CreateGroupElement(ip.Gq, vectors["sigmaB"]), "sigmaB");
SecondIssuanceMessage msg2 = prover.GenerateSecondMessage(msg1);
Assert.AreEqual(msg2.sigmaC[0], Zq.GetElement(HexToBytes(vectors["sigmaC"])), "sigmaC");
ThirdIssuanceMessage msg3 = issuer.GenerateThirdMessage(msg2);
Assert.AreEqual(msg3.sigmaR[0], Zq.GetElement(HexToBytes(vectors["sigmaR"])), "sigmaR");
UProveKeyAndToken[] upkt = prover.GenerateTokens(msg3);
Assert.AreEqual(upkt[0].PrivateKey, Zq.GetElement(HexToBytes(vectors["alphaInverse"])), "alphaInverse");
UProveToken token = upkt[0].Token;
Assert.AreEqual(token.H, CreateGroupElement(ip.Gq, vectors["h"]), "h");
Assert.AreEqual(token.SigmaZPrime, CreateGroupElement(ip.Gq, vectors["sigmaZPrime"]), "sigmaZPrime");
Assert.AreEqual(token.SigmaCPrime, Zq.GetElement(HexToBytes(vectors["sigmaCPrime"])), "sigmaCPrime");
Assert.AreEqual(token.SigmaRPrime, Zq.GetElement(HexToBytes(vectors["sigmaRPrime"])), "sigmaRPrime");
Assert.IsTrue(HexToBytes(vectors["UIDt"]).SequenceEqual(ProtocolHelper.ComputeTokenID(ip, token)), "UIDt");
Assert.IsTrue(supportDevice == token.IsDeviceProtected);
/*
* presentation
*/
int[] disclosed = Array.ConvertAll<string, int>(vectors["D"].Split(','), new Converter<string, int>(stringToInt));
int[] committed = Array.ConvertAll<string, int>(vectors["C"].Split(','), new Converter<string, int>(stringToInt));
byte[] m = HexToBytes(vectors["m"]);
byte[] md = null;
IDevicePresentationContext deviceContext = null;
if (supportDevice)
{
md = HexToBytes(vectors["md"]);
deviceContext = device.GetPresentationContext();
}
int p;
if (!int.TryParse(vectors["p"], out p))
{
p = PresentationProof.DeviceAttributeIndex;
}
byte[] s = HexToBytes(vectors["s"]);
int commitmentIndex = committed[0];
ProverPresentationProtocolParameters pppp = new ProverPresentationProtocolParameters(ip, disclosed, m, upkt[0], A);
pppp.Committed = committed;
pppp.PseudonymAttributeIndex = p;
pppp.PseudonymScope = s;
pppp.DeviceMessage = md;
pppp.DeviceContext = deviceContext;
pppp.RandomData = new ProofGenerationRandomData(
Zq.GetElement(HexToBytes(vectors["w0"])),
new FieldZqElement[] {
Zq.GetElement(HexToBytes(vectors["w1"])),
Zq.GetElement(HexToBytes(vectors["w3"])),
Zq.GetElement(HexToBytes(vectors["w4"]))
},
supportDevice ? Zq.GetElement(HexToBytes(vectors["wd"])) : null,
new FieldZqElement[] {
Zq.GetElement(HexToBytes(vectors["tildeO" + commitmentIndex])),
},
new FieldZqElement[] {
Zq.GetElement(HexToBytes(vectors["tildeW" + commitmentIndex]))
});
CommitmentPrivateValues cpv;
PresentationProof proof = PresentationProof.Generate(pppp, out cpv);
Assert.IsTrue(HexToBytes(vectors["a"]).SequenceEqual(proof.A), "a");
Assert.AreEqual(ProtocolHelper.GenerateScopeElement(ip.Gq, s), CreateGroupElement(ip.Gq, vectors["gs"]));
Assert.IsTrue(HexToBytes(vectors["ap"]).SequenceEqual(proof.Ap), "ap");
Assert.AreEqual(proof.Ps, CreateGroupElement(ip.Gq, vectors["Ps"]), "Ps");
Assert.IsTrue(HexToBytes(vectors["A2"]).SequenceEqual(proof.DisclosedAttributes[0]), "A2");
Assert.IsTrue(HexToBytes(vectors["A5"]).SequenceEqual(proof.DisclosedAttributes[1]), "A5");
Assert.AreEqual(proof.R[0], Zq.GetElement(HexToBytes(vectors["r0"])), "r0");
Assert.AreEqual(proof.R[1], Zq.GetElement(HexToBytes(vectors["r1"])), "r1");
Assert.AreEqual(proof.R[2], Zq.GetElement(HexToBytes(vectors["r3"])), "r3");
Assert.AreEqual(proof.R[3], Zq.GetElement(HexToBytes(vectors["r4"])), "r4");
if (supportDevice)
{
Assert.AreEqual(proof.R[4], Zq.GetElement(HexToBytes(vectors["rd"])), "rd");
}
Assert.AreEqual(proof.Commitments[0].TildeR, Zq.GetElement(HexToBytes(vectors["tildeR" + commitmentIndex])), "tildeR" + commitmentIndex);
Assert.IsTrue(cpv.TildeO.Length == 1);
Assert.AreEqual(cpv.TildeO[0], Zq.GetElement(HexToBytes(vectors["tildeO" + commitmentIndex])), "tildeO" + commitmentIndex);
VerifierPresentationProtocolParameters vppp = new VerifierPresentationProtocolParameters(ip, disclosed, m, upkt[0].Token);
vppp.Committed = committed;
vppp.PseudonymAttributeIndex = p;
vppp.PseudonymScope = s;
vppp.DeviceMessage = md;
proof.Verify(vppp);
}
}
sw.Stop();
Debug.WriteLine("Protocol Test Elapsed Time: " + sw.ElapsedMilliseconds + "ms");
}