/// <summary>
/// Verifies that a UProve token attribute is in a given set.
/// </summary>
/// <param name="verifier">Verifier info about token.</param>
/// <param name="attributeIndexForVerifier">Target attribute, 1-based index.</param>
/// <param name="setValues">Set of values for attribute.</param>
/// <returns></returns>
public bool Verify(
VerifierPresentationProtocolParameters verifier,
int attributeIndexForVerifier,
byte [][] setValues)
{
// Verify UProve Integration Proof
if (this.UPIProof == null)
{
return(false);
}
VerifierPresentationProtocolParameters[] verifiers = new VerifierPresentationProtocolParameters[1] {
verifier
};
int[] attributeIndices = new int[1] {
attributeIndexForVerifier
};
if (!this.UPIProof.Verify(verifiers, attributeIndices))
{
return(false);
}
// Verify Set Membership Proof
FieldZqElement[] memberSet = VerifierSetMembershipParameters.GenerateMemberSet(verifier.IP, attributeIndexForVerifier, setValues);
VerifierSetMembershipParameters setVerifier = new VerifierSetMembershipParameters(this.UPIProof.PedersenCommitmentValues[0], memberSet, new CryptoParameters(verifier.IP));
return(this.Verify(setVerifier));
}
private static CommitmentPrivateValues PresentUProveToken(IssuerParameters ip, UProveKeyAndToken upkt, byte[][] attributes, int[] disclosed, int[] committed, byte[] message, byte[] scope, IDevice device, byte[] deviceMessage)
{
WriteLine("Presenting one token");
// the returned commitment randomizer (to be used by an external proof module)
CommitmentPrivateValues cpv;
// generate the presentation proof
string token = ip.Serialize <UProveToken>(upkt.Token);
ProverPresentationProtocolParameters pppp = new ProverPresentationProtocolParameters(ip, disclosed, message, upkt, attributes);
pppp.Committed = committed;
// if a scope is defined, we use the first attribute to derive a scope exclusive pseudonym
pppp.PseudonymAttributeIndex = (scope == null ? 0 : 1);
pppp.PseudonymScope = scope;
if (device != null)
{
pppp.SetDeviceData(deviceMessage, device.GetPresentationContext());
}
pppp.KeyAndToken = upkt;
pppp.Attributes = attributes;
string proof = ip.Serialize <PresentationProof>(PresentationProof.Generate(pppp, out cpv));
// verify the presentation proof
VerifierPresentationProtocolParameters vppp = new VerifierPresentationProtocolParameters(ip, disclosed, message, ip.Deserialize <UProveToken>(token));
vppp.Committed = committed;
// if a scope is defined, we use the first attribute to derive a scope exclusive pseudonym
vppp.PseudonymAttributeIndex = (scope == null ? 0 : 1);
vppp.PseudonymScope = scope;
vppp.DeviceMessage = deviceMessage;
ip.Deserialize <PresentationProof>(proof).Verify(vppp);
return(cpv);
}
/// <summary>
/// Verifies an inequality proof that two tokens have unequal attributes.
/// </summary>
/// <param name="verifier1">Verifier information about first token.</param>
/// <param name="attributeIndexForVerifier1">Target attribute in first token, 1-based index.</param>
/// <param name="verifier2">Verifier information about second token.</param>
/// <param name="attributeIndexForVerifier2">Target attribute in second token, 1-based index.</param>
/// <returns></returns>
public bool Verify(
VerifierPresentationProtocolParameters verifier1,
int attributeIndexForVerifier1,
VerifierPresentationProtocolParameters verifier2,
int attributeIndexForVerifier2)
{
// Verify UProve Integration Proof
if (this.UPIProof == null)
{
return(false);
}
VerifierPresentationProtocolParameters[] verifiers = new VerifierPresentationProtocolParameters[2] {
verifier1, verifier2
};
int[] attributeIndices = new int[2] {
attributeIndexForVerifier1, attributeIndexForVerifier2
};
if (!this.UPIProof.Verify(verifiers, attributeIndices))
{
return(false);
}
// Verify Inequality Proof
VerifierInequalityProofParameters ieqVerifier = new VerifierInequalityProofParameters(this.UPIProof.PedersenCommitmentValues[0], this.UPIProof.PedersenCommitmentValues[1], new CryptoParameters(verifier1.IP));
return(this.Verify(ieqVerifier));
}
/// <summary>
/// Verifies that a UProve token attribute is not equal to the given attribute value.
/// </summary>
/// <param name="verifier">Verifier info about token.</param>
/// <param name="attributeIndexForVerifier">Target attribute, 1-based index.</param>
/// <param name="attributeValue">Bad value for attribute.</param>
/// <returns></returns>
public bool Verify(
VerifierPresentationProtocolParameters verifier,
int attributeIndexForVerifier,
byte [] attributeValue)
{
// Verify UProve Integration Proof
if (this.UPIProof == null)
{
return(false);
}
VerifierPresentationProtocolParameters[] verifiers = new VerifierPresentationProtocolParameters[1] {
verifier
};
int[] attributeIndices = new int[1] {
attributeIndexForVerifier
};
if (!this.UPIProof.Verify(verifiers, attributeIndices))
{
return(false);
}
// Verify Inequality Proof
FieldZqElement committedAttribute = ProtocolHelper.ComputeXi(verifier.IP, attributeIndexForVerifier - 1, attributeValue);
VerifierInequalityProofParameters ieqVerifier = new VerifierInequalityProofParameters(this.UPIProof.PedersenCommitmentValues[0], committedAttribute, new CryptoParameters(verifier.IP));
return(this.Verify(ieqVerifier));
}
/// <summary>
/// Creates a closed UProve token for proof verification.
/// </summary>
/// <param name="vppp">Verifier parameters</param>
/// <param name="device">Required for device protected tokens.</param>
public ClosedUProveToken(VerifierPresentationProtocolParameters vppp)
{
this.Bases = new GroupElement[vppp.IP.E.Length + 2];
for (int i = 0; i < this.G.Length; ++i)
{
this.Bases[i] = vppp.IP.G[i];
}
this.Value = vppp.Token.H;
this.Group = vppp.IP.Gq;
this.Exponents = null;
}
/// <summary>
/// Verifies a set membership proof from U-Prove parameters.
/// </summary>
/// <param name="vppp">The verifier presentation protocol parameters.</param>
/// <param name="pProof">A presentation proof.</param>
/// <param name="smProof">A set presentation proof.</param>
/// <param name="committedIndex">Index of the committed attribute used to generate the set membership proof.</param>
/// <param name="setValues">Set values to verify against.</param>
/// <returns>True if the proof is valid, false otherwise.</returns>
public static bool Verify(VerifierPresentationProtocolParameters vppp, PresentationProof pProof, SetMembershipProof smProof, int committedIndex, byte[][] setValues)
{
// get the index of the commitment to use, given the underlying attribute's index
int commitmentIndex = ClosedPedersenCommitment.GetCommitmentIndex(vppp.Committed, committedIndex);
// verify the membership proof
ClosedDLRepOfGroupElement closedCommittedClearance = new ClosedPedersenCommitment(vppp.IP, pProof, commitmentIndex);
VerifierSetMembershipParameters setVerifier = new VerifierSetMembershipParameters(
closedCommittedClearance.Value,
VerifierSetMembershipParameters.GenerateMemberSet(vppp.IP, committedIndex, setValues),
new CryptoParameters(vppp.IP));
return(smProof.Verify(setVerifier));
}
public bool Verify(
VerifierPresentationProtocolParameters verifier1,
int attributeIndexForVerifier1,
VerifierRangeProofParameters.ProofType proofType,
VerifierPresentationProtocolParameters verifier2,
int attributeIndexForVerifier2,
int minYear,
int maxYear)
{
// Verify target attribute is not hashed
if ((verifier1.IP.E[attributeIndexForVerifier1 - 1] == 0x01) || (verifier2.IP.E[attributeIndexForVerifier1 - 1] == 0x01))
{
return(false);
}
// Verify UProve Integration Proof
if (this.UPIProof == null)
{
return(false);
}
VerifierPresentationProtocolParameters[] verifiers = new VerifierPresentationProtocolParameters[2] {
verifier1, verifier2
};
int[] attributeIndices = new int[2] {
attributeIndexForVerifier1, attributeIndexForVerifier2
};
if (!this.UPIProof.Verify(verifiers, attributeIndices))
{
return(false);
}
// Verify Range Proof
VerifierRangeProofParameters rangeVerifier = new VerifierRangeProofParameters(
new CryptoParameters(verifier1.IP),
this.UPIProof.PedersenCommitmentValues[0],
proofType,
this.UPIProof.PedersenCommitmentValues[1],
minYear,
maxYear);
return(this.Verify(rangeVerifier));
}
public bool Verify(VerifierPresentationProtocolParameters verifier1, int attributeIndexForVerifier1, VerifierPresentationProtocolParameters verifier2, int attributeIndexForVerifier2)
{
if (!verifier1.IP.Gq.Equals(verifier2.IP.Gq))
{
throw new ArgumentException("both verifiers must share the same group");
}
// Create ClosedUProveTokens
ClosedUProveToken token1 = new ClosedUProveToken(verifier1);
ClosedUProveToken token2 = new ClosedUProveToken(verifier2);
// Verify proof
VerifierEqualityParameters eqVerifier = new VerifierEqualityParameters(
token1,
attributeIndexForVerifier1,
token2,
attributeIndexForVerifier2,
new CryptoParameters(verifier1.IP));
return(this.Verify(eqVerifier));
}
/// <summary>
/// Verifies if the given json message has sent a correct proof
/// the result is written into proofVerification.Proof
/// Init must called first
/// </summary>
private void VerifyProof()
{
LogService.Log(LogService.LogType.Info, "IssuingVerifier - VerifyProof called");
if (!isInitialized)
{
proofAccepted = false;
tokenAccepted = false;
throw new Exception("VerifyProof - Init must be called first");
}
int[] disclosedAttributes = proofRequirements.disclosedAttributes;
int[] committedAttributes = proofRequirements.committedAttributes;
byte[] message = proofRequirements.message;
byte[] scope = proofRequirements.scope;
byte[] deviceMessage = proofRequirements.deviceMessage;
vppp = new VerifierPresentationProtocolParameters(IP, disclosedAttributes, message, IP.Deserialize <UProveToken>(tokenJson));
vppp.Committed = committedAttributes;
// if a scope is defined, we use the first attribute to derive a scope exclusive pseudonym
vppp.PseudonymAttributeIndex = (scope == null ? 0 : 1);
vppp.PseudonymScope = scope;
vppp.DeviceMessage = deviceMessage;
try
{
pProof = IP.Deserialize <PresentationProof>(proofJson);
pProof.Verify(vppp);
}
catch (InvalidUProveArtifactException e)
{
LogService.Log(LogService.LogType.FatalError, "IssuingVerifier - Proof verification failed", e);
throw new Exception("VerifyProof - Proof verification failed", e);
}
proofAccepted = true;
tokenAccepted = true;
LogService.Log(LogService.LogType.Info, "IssuingVerifier - Proof passed tests");
}
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)
{
foreach (int DSize in new int[] { 0, 2, 5 })
{
foreach (bool isLite in bools)
{
string filename = "TestVectorData\\testvectors_";
if (isSubgroupConstruction)
{
filename += "SG";
}
else
{
filename += "EC";
}
if (supportDevice)
{
filename += "_Device";
}
filename += ("_D" + DSize);
if (isLite)
{
filename += "_lite";
}
filename += "_doc.txt";
var vectors = GetTestVectors(filename);
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["cp"]), 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 = new int[] { };
if (vectors.ContainsKey("D") && vectors["D"].Length > 0)
{
disclosed = Array.ConvertAll <string, int>(vectors["D"].Split(','), new Converter <string, int>(stringToInt));
}
int[] undisclosed = new int[5 - disclosed.Length];
int dIndex = 0, uIndex = 0;
for (int i = 1; i <= 5; i++)
{
if (disclosed.Length > 0 && disclosed[dIndex] == i)
{
dIndex++;
}
else
{
undisclosed[uIndex++] = i;
}
}
int[] committed = new int[] { };
if (vectors.ContainsKey("C") && vectors["C"].Length > 0)
{
committed = Array.ConvertAll <string, int>(vectors["C"].Split(','), new Converter <string, int>(stringToInt));
}
byte[] m = HexToBytes(vectors["m"]);
byte[] md = HexToBytes(vectors["md"]);
IDevicePresentationContext deviceContext = null;
if (supportDevice)
{
deviceContext = device.GetPresentationContext();
}
int p = 0;
if (vectors.ContainsKey("p") && !int.TryParse(vectors["p"], out p))
{
p = PresentationProof.DeviceAttributeIndex;
}
byte[] s = vectors.ContainsKey("s") ? HexToBytes(vectors["s"]) : null;
int commitmentIndex = committed.Length > 0 ? committed[0] : 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;
FieldZqElement[] w = new FieldZqElement[undisclosed.Length];
for (int i = 0; i < undisclosed.Length; i++)
{
w[i] = Zq.GetElement(HexToBytes(vectors["w" + undisclosed[i]]));
}
FieldZqElement[] tildeO = new FieldZqElement[committed.Length];
FieldZqElement[] tildeW = new FieldZqElement[committed.Length];
for (int i = 0; i < committed.Length; i++)
{
tildeO[i] = Zq.GetElement(HexToBytes(vectors["tildeO" + committed[i]]));
tildeW[i] = Zq.GetElement(HexToBytes(vectors["tildeW" + committed[i]]));
}
pppp.RandomData = new ProofGenerationRandomData(
Zq.GetElement(HexToBytes(vectors["w0"])),
w,
supportDevice ? Zq.GetElement(HexToBytes(vectors["wd"])) : null,
tildeO,
tildeW);
CommitmentPrivateValues cpv;
PresentationProof proof = PresentationProof.Generate(pppp, out cpv);
Assert.IsTrue(HexToBytes(vectors["a"]).SequenceEqual(proof.A), "a");
if (vectors.ContainsKey("gs"))
{
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");
}
for (int i = 0; i < disclosed.Length; i++)
{
Assert.IsTrue(HexToBytes(vectors["A" + disclosed[i]]).SequenceEqual(proof.DisclosedAttributes[i]), "A" + disclosed[i]);
}
Assert.AreEqual(proof.R[0], Zq.GetElement(HexToBytes(vectors["r0"])), "r0");
for (int i = 0; i < undisclosed.Length; i++)
{
Assert.AreEqual(proof.R[i + 1], Zq.GetElement(HexToBytes(vectors["r" + undisclosed[i]])), "r" + undisclosed[i]);
}
if (supportDevice)
{
Assert.AreEqual(proof.R[proof.R.Length - 1], Zq.GetElement(HexToBytes(vectors["rd"])), "rd");
}
for (int i = 0; i < committed.Length; i++)
{
Assert.AreEqual(proof.Commitments[i].TildeR, Zq.GetElement(HexToBytes(vectors["tildeR" + committed[i]])), "tildeR" + committed[i]);
Assert.IsTrue(cpv.TildeO.Length == committed.Length);
Assert.AreEqual(cpv.TildeO[i], Zq.GetElement(HexToBytes(vectors["tildeO" + committed[i]])), "tildeO" + committed[i]);
}
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);
#if TEST_ID_ESCROW
if (committed.Length > 0)
{
IDEscrowParams escrowParams = new IDEscrowParams(ip);
IDEscrowPrivateKey escrowPrivateKey = new IDEscrowPrivateKey(Zq.GetElement(HexToBytes(vectors["ie_x"])));
IDEscrowPublicKey escrowPublicKey = new IDEscrowPublicKey(escrowParams, escrowPrivateKey);
Assert.AreEqual(escrowPublicKey.H, CreateGroupElement(ip.Gq, vectors["ie_H"]), "ie_H");
byte[] additionalInfo = HexToBytes(vectors["ie_additionalInfo"]);
int ie_bIndex = int.Parse(vectors["ie_b"]);
IDEscrowCiphertext ctext = IDEscrowFunctions.VerifiableEncrypt(
escrowParams,
escrowPublicKey,
HexToBytes(vectors["UIDt"]),
proof.Commitments[0].TildeC,
ProtocolHelper.ComputeXi(ip, ie_bIndex - 1, A[ie_bIndex - 1]),
cpv.TildeO[0],
additionalInfo,
new IDEscrowFunctions.IDEscrowProofGenerationRandomData(
Zq.GetElement(HexToBytes(vectors["ie_r"])),
Zq.GetElement(HexToBytes(vectors["ie_xbPrime"])),
Zq.GetElement(HexToBytes(vectors["ie_rPrime"])),
Zq.GetElement(HexToBytes(vectors["ie_obPrime"]))));
Assert.IsTrue(IDEscrowFunctions.UProveVerify(escrowParams, ctext, proof, upkt[0].Token, escrowPublicKey));
Assert.AreEqual(ctext.E1, CreateGroupElement(ip.Gq, vectors["ie_E1"]), "ie_E1");
Assert.AreEqual(ctext.E2, CreateGroupElement(ip.Gq, vectors["ie_E2"]), "ie_E2");
Assert.AreEqual(ctext.proof.c, Zq.GetElement(HexToBytes(vectors["ie_c"])), "ie_c");
Assert.AreEqual(ctext.proof.rR, Zq.GetElement(HexToBytes(vectors["ie_rr"])), "ie_rr");
Assert.AreEqual(ctext.proof.rXb, Zq.GetElement(HexToBytes(vectors["ie_rxb"])), "ie_rxb");
Assert.AreEqual(ctext.proof.rOb, Zq.GetElement(HexToBytes(vectors["ie_rob"])), "ie_rob");
GroupElement PE = IDEscrowFunctions.Decrypt(escrowParams, ctext, escrowPrivateKey);
}
#endif
#if TEST_DVA_REVOCATION
if (committed.Length > 0)
{
RAParameters raParams = new RAParameters(ip.Gq.GroupName, CreateGroupElement(ip.Gq, vectors["r_K"]), ip.UidH);
FieldZqElement delta = Zq.GetElement(HexToBytes(vectors["r_delta"]));
RevocationAuthority RA = new RevocationAuthority(raParams, delta);
HashSet <FieldZqElement> revoked = new HashSet <FieldZqElement>();
for (int i = 1; i <= 4; i++)
{
revoked.Add(Zq.GetElement(HexToBytes(vectors["r_R" + i])));
}
RA.UpdateAccumulator(revoked, null);
Assert.AreEqual(RA.Accumulator, CreateGroupElement(ip.Gq, vectors["r_V"]), "r_V");
int r_id = 0;
int.TryParse(vectors["r_id"], out r_id);
RevocationWitness witness = RA.ComputeRevocationWitness(revoked, Zq.GetElement(HexToBytes(vectors["x" + r_id])));
Assert.AreEqual(witness.d, Zq.GetElement(HexToBytes(vectors["r_d"])), "r_d");
Assert.AreEqual(witness.W, CreateGroupElement(ip.Gq, vectors["r_W"]), "r_W");
Assert.AreEqual(witness.Q, CreateGroupElement(ip.Gq, vectors["r_Q"]), "r_Q");
NonRevocationProof nrProof = RevocationUser.GenerateNonRevocationProof(
raParams,
witness,
proof.Commitments[0].TildeC, ProtocolHelper.ComputeXi(ip, r_id - 1, A[r_id - 1]),
cpv.TildeO[0],
new NonRevocationProofGenerationRandomData(new FieldZqElement[] {
Zq.GetElement(HexToBytes(vectors["r_t1"])),
Zq.GetElement(HexToBytes(vectors["r_t2"])),
Zq.GetElement(HexToBytes(vectors["r_k1"])),
Zq.GetElement(HexToBytes(vectors["r_k2"])),
Zq.GetElement(HexToBytes(vectors["r_k3"])),
Zq.GetElement(HexToBytes(vectors["r_k4"])),
Zq.GetElement(HexToBytes(vectors["r_k5"])),
Zq.GetElement(HexToBytes(vectors["r_k6"]))
}));
Assert.AreEqual(nrProof.X, CreateGroupElement(ip.Gq, vectors["r_X"]), "r_X");
Assert.AreEqual(nrProof.Y, CreateGroupElement(ip.Gq, vectors["r_Y"]), "r_Y");
Assert.AreEqual(nrProof.Cd, CreateGroupElement(ip.Gq, vectors["r_Cd"]), "r_Cd");
Assert.AreEqual(nrProof.cPrime, Zq.GetElement(HexToBytes(vectors["r_cPrime"])), "r_cPrime");
Assert.AreEqual(nrProof.s[0], Zq.GetElement(HexToBytes(vectors["r_s1"])), "r_s1");
Assert.AreEqual(nrProof.s[1], Zq.GetElement(HexToBytes(vectors["r_s2"])), "r_s2");
Assert.AreEqual(nrProof.s[2], Zq.GetElement(HexToBytes(vectors["r_s3"])), "r_s3");
Assert.AreEqual(nrProof.s[3], Zq.GetElement(HexToBytes(vectors["r_s4"])), "r_s4");
Assert.AreEqual(nrProof.s[4], Zq.GetElement(HexToBytes(vectors["r_s5"])), "r_s5");
Assert.AreEqual(nrProof.s[5], Zq.GetElement(HexToBytes(vectors["r_s6"])), "r_s6");
// validate proof
RA.VerifyNonRevocationProof(ip, 0, proof, nrProof);
}
#endif
#if TEST_SET_MEMBERSHIP
if (committed.Length > 0)
{
int sm_x_index = 0;
int.TryParse(vectors["sm_x_index"], out sm_x_index);
int sm_n = 0;
int.TryParse(vectors["sm_n"], out sm_n);
int sm_i = 0;
int.TryParse(vectors["sm_i"], out sm_i);
byte[][] setValues = new byte[sm_n][];
FieldZqElement[] sm_c = new FieldZqElement[sm_n - 1];
FieldZqElement[] sm_r = new FieldZqElement[sm_n - 1];
int randomIndex = 0;
for (int i = 1; i <= sm_n; i++)
{
if (i == sm_i)
{
setValues[i - 1] = HexToBytes(vectors["A" + sm_x_index]);
}
else
{
setValues[i - 1] = HexToBytes(vectors["sm_s" + i]);
sm_c[randomIndex] = Zq.GetElement(HexToBytes(vectors["sm_c" + i]));
sm_r[randomIndex] = Zq.GetElement(HexToBytes(vectors["sm_r" + i]));
randomIndex++;
}
}
SetMembershipProofGenerationRandomData smRandom = new SetMembershipProofGenerationRandomData(sm_c, sm_r, Zq.GetElement(HexToBytes(vectors["sm_w"])));
SetMembershipProof setMembershipProof = SetMembershipProof.Generate(pppp, proof, cpv, sm_x_index, setValues, smRandom);
for (int i = 1; i <= sm_n; i++)
{
Assert.AreEqual(setMembershipProof.a[i - 1], CreateGroupElement(ip.Gq, vectors["sm_a" + i]), "sm_a" + i);
if (i < sm_n) // no c_n in the proof
{
Assert.AreEqual(setMembershipProof.c[i - 1], Zq.GetElement(HexToBytes(vectors["sm_c" + i])), "sm_c" + i);
}
Assert.AreEqual(setMembershipProof.r[i - 1], Zq.GetElement(HexToBytes(vectors["sm_r" + i])), "sm_r" + i);
}
if (!SetMembershipProof.Verify(vppp, proof, setMembershipProof, sm_x_index, setValues))
{
throw new InvalidUProveArtifactException("Invalid set membership proof");
}
}
#endif
}
}
}
}
sw.Stop();
Debug.WriteLine("Protocol Test Elapsed Time: " + sw.ElapsedMilliseconds + "ms");
}
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");
}
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;
}
/// <summary>
/// Constructor.
/// </summary>
public EQProofUProveVerifierData(VerifierPresentationProtocolParameters vppp, PresentationProof pp, int index)
{
this.VPPP = vppp;
this.PP = pp;
this.index = index;
}