public static bool Verify(UProveToken upt1, object obj)
{
UProveToken upt2 = GetSameType(upt1, obj);
if (upt2 == null)
{
return(false);
}
if (Object.ReferenceEquals(upt1, upt2))
{
return(true);
}
if (CompareFields(upt2.Uidp, upt1.Uidp) == false)
{
return(false);
}
if (CompareFields(upt2.H, upt1.H) == false)
{
return(false);
}
if (CompareFields(upt2.TI, upt1.TI) == false)
{
return(false);
}
if (CompareFields(upt2.PI, upt1.PI) == false)
{
return(false);
}
if (CompareFields(upt2.SigmaZPrime, upt1.SigmaZPrime) == false)
{
return(false);
}
if (CompareFields(upt2.SigmaCPrime, upt1.SigmaCPrime) == false)
{
return(false);
}
if (CompareFields(upt2.SigmaRPrime, upt1.SigmaRPrime) == false)
{
return(false);
}
if (upt2.IsDeviceProtected != upt1.IsDeviceProtected)
{
return(false);
}
return(true);
}
public bool verifyTokenProof(PresentationProofComposite proof, int[] disclosedIndices, int[] committedIndices, string messageParam, string verifierScopeParam, IssuerParametersComposite ipc, UProveTokenComposite token, string sessionID)
{
/*
* token verification
*/
cOut.write("Verifying a U-Prove token");
VerifySessionId(sessionID);
IssuerParameters ip = ConvertUtils.convertIssuerParametersComposite(ipc, sessionDB[sessionID]);
// the application-specific message that the prover will sign. Typically this is a nonce combined
// with any application-specific transaction data to be signed.
byte[] message = encoding.GetBytes(messageParam);
// the application-specific verifier scope from which a scope-exclusive pseudonym will be created
// (if null, then a pseudonym will not be presented)
byte[] scope = null;
if (verifierScopeParam != "null")
{
scope = encoding.GetBytes(verifierScopeParam);
}
// verify the presentation proof
try
{
byte[] tokenId;
byte[] proofSession;
UProveToken t = ConvertUtils.convertUProveTokenComposite(ip, token);
PresentationProof p = ConvertUtils.convertPresentationProofComposite(ip, proof, out tokenId, out proofSession);
p.Verify(ip,
disclosedIndices,
committedIndices,
scope != null ? DevicePseudonymIndex : 0,
scope,
message,
proofSession,
t);
if (proof.TokenID != null && !ProtocolHelper.ComputeTokenID(ip, t).SequenceEqual(proof.TokenID))
{
cOut.write("Invalid Token ID");
return(false);
}
return(true);
}
catch (Exception e)
{
cOut.write("Exception caught: " + e.Message);
DebugUtils.DebugPrint(e.StackTrace.ToString());
return(false);
}
}
public static UProveToken convertUProveTokenComposite(IssuerParameters ip, UProveTokenComposite utc)
{
UProveToken up = new UProveToken();
up.H = ip.Gq.CreateGroupElement(utc.H);
up.IsDeviceProtected = utc.IsDeviceProtected;
up.PI = utc.PI;
up.SigmaCPrime = new BigInteger(1, utc.SigmaCPrime);
up.SigmaRPrime = new BigInteger(1, utc.SigmaRPrime);
up.SigmaZPrime = ip.Gq.CreateGroupElement(utc.SigmaZPrime);
up.TI = utc.TI;
up.Uidp = utc.Uidp;
return(up);
}
public static UProveTokenComposite convertUProveToken(UProveToken up)
{
UProveTokenComposite utc = new UProveTokenComposite();
utc.H = up.H.GetEncoded();
utc.IsDeviceProtected = up.IsDeviceProtected;
utc.PI = up.PI;
utc.SigmaCPrime = up.SigmaCPrime.ToByteArray();
utc.SigmaRPrime = up.SigmaRPrime.ToByteArray();
utc.SigmaZPrime = up.SigmaZPrime.GetEncoded();
utc.TI = up.TI;
utc.Uidp = up.Uidp;
return(utc);
}
/// <summary>
/// Create a verifiable encryption of a pseudonym based on a U-Prove presentation proof. This is a wrapper
/// of <c>VerifiableEncrypt</c>.
///
/// </summary>
/// <param name="escrowParams"> Parameters of the ID escrow scheme</param>
/// <param name="escrowPublicKey"> Public key of the Auditor (the authority who can decrypt the output ciphertex).</param>
/// <param name="token"> The U-Prove token corresponding to the <c>proof</c>. </param>
/// <param name="additionalInfo">See documentation of <c>VerifiableEncrypt</c></param>
/// <param name="proof">A U-Prove prsentation proof.</param>
/// <param name="cpv">Commitment opening information, output when generating <c>proof</c>.</param>
/// <param name="idAttributeIndex"> Index of the attribute to use for identity escrow (1-based indexing). This attribute <b>must be</b>
/// the first commited attribute (take care if using multiple extensions). </param>
/// <param name="attributes"> Attributes in <c>token</c>.</param>
/// <returns></returns>
public static IDEscrowCiphertext UProveVerifableEncrypt(IDEscrowParams escrowParams, IDEscrowPublicKey escrowPublicKey,
UProveToken token, byte[] additionalInfo, PresentationProof proof,
CommitmentPrivateValues cpv, int idAttributeIndex, byte[][] attributes)
{
if (token == null || escrowParams == null || proof == null || cpv == null)
{
throw new ArgumentNullException("null input to UProveVerifiableEncrypt");
}
if (proof.Commitments == null || proof.Commitments.Length < 1 ||
attributes.Length < idAttributeIndex || cpv.TildeO == null || cpv.TildeO.Length < 1)
{
throw new InvalidUProveArtifactException("invalid inputs to UProveVerifiableEncrypt");
}
byte[] tokenId = ProtocolHelper.ComputeTokenID(escrowParams.ip, token);
GroupElement Cx1 = proof.Commitments[0].TildeC; // x1 is the first committed attribute
FieldZqElement x1 = ProtocolHelper.ComputeXi(escrowParams.ip, idAttributeIndex - 1, attributes[idAttributeIndex - 1]); // arrays are 0-based
FieldZqElement tildeO1 = cpv.TildeO[0];
return(IDEscrowFunctions.VerifiableEncrypt(escrowParams, escrowPublicKey, tokenId, Cx1, x1, tildeO1, additionalInfo));
}
public PresentationProofComposite proveToken(string[] attributesParam, int[] disclosedIndices, int[] committedIndices, string messageParam, string verifierScopeParam, IssuerParametersComposite ipc, UProveTokenComposite tokenComposite, byte[] tokenPrivateKeyParam, string sessionID)
{
/*
* token presentation
*/
cOut.write("Presenting a U-Prove token");
VerifySessionId(sessionID);
try
{
// specify the attribute values agreed to by the Issuer and Prover
int numberOfAttributes = attributesParam.Length;
byte[][] attributes = new byte[numberOfAttributes][];
for (int i = 0; i < numberOfAttributes; i++)
{
attributes[i] = encoding.GetBytes(attributesParam[i]);
}
IssuerParameters ip = ConvertUtils.convertIssuerParametersComposite(ipc, sessionDB[sessionID]);
// the application-specific message that the prover will sign. Typically this is a nonce combined
// with any application-specific transaction data to be signed.
byte[] message = encoding.GetBytes(messageParam);
// the application-specific verifier scope from which a scope-exclusive pseudonym will be created
// (if null, then a pseudonym will not be presented)
byte[] scope = null;
if (verifierScopeParam != null && verifierScopeParam != "null")
{
scope = encoding.GetBytes(verifierScopeParam);
}
// generate the presentation proof
UProveToken uProveToken = ConvertUtils.convertUProveTokenComposite(ip, tokenComposite);
byte[] bigInt = tokenPrivateKeyParam;
DeviceManager dManager = sessionDB[sessionID].deviceManager;
UProveKeyAndToken keyAndToken = new UProveKeyAndToken();
keyAndToken.PrivateKey = new BigInteger(1, bigInt);
keyAndToken.Token = uProveToken;
byte[] proofSession = null;
if (!dManager.IsVirtualDevice)
{
SmartCardDevice smartDevice = (SmartCardDevice)dManager.GetDevice();
smartDevice.ProofSession = smartDevice.Device.BeginCommitment(1);
byte[] proofSessionRaw = smartDevice.ProofSession;
proofSession = new byte[1 + proofSessionRaw.Length];
proofSession[0] = 1;
Buffer.BlockCopy(proofSessionRaw, 0, proofSession, 1, proofSessionRaw.Length);
}
BigInteger[] commitmentValues;
PresentationProof p =
PresentationProof.Generate(ip,
disclosedIndices,
committedIndices,
scope != null ? DevicePseudonymIndex : 0,
scope,
message,
proofSession,
dManager.GetDevice().GetPresentationContext(),
keyAndToken,
attributes,
out commitmentValues);
#if DEBUG
dManager.pDebug = p;
#endif
return(ConvertUtils.convertPresentationProof(p, commitmentValues, ProtocolHelper.ComputeTokenID(ip, uProveToken), proofSession));
}
catch (Exception e)
{
cOut.write(e.ToString());
DebugUtils.DebugPrint(e.StackTrace.ToString());
}
return(null);
}
/// <summary>
/// Verifies that an <c>IECiphertext</c> was computed correctly.
/// This is a wrapper around <c>IEFunctions.Verify</c> for use with U-Prove.
/// </summary>
/// <param name="escrowParams">Parameters of the ID escrow scheme</param>
/// <param name="ctext">A ciphertext created with <c>param</c> and <c>pk</c>. </param>
/// <param name="proof">The associated U-Prove presentation proof.</param>
/// <param name="token">The associated U-Prove token.</param>
/// <param name="pk">The auditor's public key</param>
/// <returns> True if the ciphertext is valid, false if it is invalid.</returns>
/// <remarks>The identity <b>must be</b> the first committed attribute in the proof (as
/// in <c>UProveVerifiableEncrypt</c>).</remarks>
public static bool UProveVerify(IDEscrowParams escrowParams, IDEscrowCiphertext ctext, PresentationProof proof, UProveToken token, IDEscrowPublicKey pk)
{
if (escrowParams == null || ctext == null || proof == null || token == null || pk == null)
{
throw new ArgumentException("null input to UProveVerify");
}
if (proof.Commitments == null || proof.Commitments.Length < 1)
{
throw new InvalidUProveArtifactException("invalid inputs to UProveVerifiableEncrypt");
}
GroupElement Cx1 = proof.Commitments[0].TildeC;
byte[] tokenId = ProtocolHelper.ComputeTokenID(escrowParams.ip, token);
return(IDEscrowFunctions.Verify(escrowParams, ctext, tokenId, pk, Cx1));
}
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 void TestSerializationReference()
{
// Create IssuerSetupParameters
System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
foreach (string fileName in Directory.GetFiles("SerializationReference"))
{
FileStream f = File.OpenRead(fileName);
BinaryFormatter bf = new BinaryFormatter();
object[] parameters = (object[])bf.Deserialize(f);
f.Close();
bool useCustomGroup = (bool)parameters[0];
bool useSubgroupConstruction = (bool)parameters[1];
string typeName = (string)parameters[2];
string json = (string)parameters[3];
IssuerSetupParameters isp = new IssuerSetupParameters();
if (useSubgroupConstruction)
{
isp.GroupConstruction = GroupType.Subgroup;
if (useCustomGroup)
{
byte[] p = HexToBytes("d21ae8d66e6c6b3ced0eb3df1a26c91bdeed013c17d849d30ec309813e4d3799f26db0d494e82ec61ea9fdc70bb5cbcaf2e5f18a836494f58e67c6d616480c37a7f2306101fc9f0f4768f9c9793c2be176b0b7c979b4065d3e835686a3f0b8420c6834cb17930386dedab2b07dd473449a48baab316286b421052475d134cd3b");
byte[] q = HexToBytes("fff80ae19daebc61f46356af0935dc0e81148eb1");
byte[] g = HexToBytes("abcec972e9a9dd8d133270cfeac26f726e567d964757630d6bd43460d0923a46aec0ace255ebf3ddd4b1c4264f53e68b361afb777a13cf0067dae364a34d55a0965a6cccf78852782923813cf8708834d91f6557d783ec75b5f37cd9185f027b042c1c72e121b1266a408be0bb7270d65917b69083633e1f3cd60624612fc8c1");
isp.Gq = SubgroupGroup.CreateSubgroupGroup(
p,
q,
g,
null,
null);
isp.UidH = "SHA1";
}
}
else
{
isp.GroupConstruction = GroupType.ECC;
if (useCustomGroup)
{
continue;
}
}
isp.UidP = encoding.GetBytes("http://issuer/uprove/issuerparams/software");
isp.E = IssuerSetupParameters.GetDefaultEValues(3);
isp.S = encoding.GetBytes("application-specific specification");
// Generate IssuerKeyAndParameters
IssuerKeyAndParameters ikap = isp.Generate();
// Create an IssuerParameters
IssuerParameters ip = ikap.IssuerParameters;
// check that we didn't send any null fields
Assert.IsFalse(json.Contains(":null"));
string roundTrip = "";
if (typeName == "UProveCrypto.IssuerParameters")
{
IssuerParameters obj = ip.Deserialize <IssuerParameters>(json);
roundTrip = ip.Serialize <IssuerParameters>(obj);
}
else if (typeName == "UProveCrypto.IssuerKeyAndParameters")
{
IssuerKeyAndParameters obj = ip.Deserialize <IssuerKeyAndParameters>(json);
roundTrip = ip.Serialize <IssuerKeyAndParameters>(obj);
}
else if (typeName == "UProveCrypto.FirstIssuanceMessage")
{
FirstIssuanceMessage obj = ip.Deserialize <FirstIssuanceMessage>(json);
roundTrip = ip.Serialize <FirstIssuanceMessage>(obj);
}
else if (typeName == "UProveCrypto.SecondIssuanceMessage")
{
SecondIssuanceMessage obj = ip.Deserialize <SecondIssuanceMessage>(json);
roundTrip = ip.Serialize <SecondIssuanceMessage>(obj);
}
else if (typeName == "UProveCrypto.ThirdIssuanceMessage")
{
ThirdIssuanceMessage obj = ip.Deserialize <ThirdIssuanceMessage>(json);
roundTrip = ip.Serialize <ThirdIssuanceMessage>(obj);
}
else if (typeName == "UProveCrypto.UProveKeyAndToken")
{
UProveKeyAndToken obj = ip.Deserialize <UProveKeyAndToken>(json);
roundTrip = ip.Serialize <UProveKeyAndToken>(obj);
}
else if (typeName == "UProveCrypto.UProveToken")
{
UProveToken obj = ip.Deserialize <UProveToken>(json);
roundTrip = ip.Serialize <UProveToken>(obj);
}
else if (typeName == "UProveCrypto.PresentationProof")
{
PresentationProof obj = ip.Deserialize <PresentationProof>(json);
roundTrip = ip.Serialize <PresentationProof>(obj);
}
else
{
Assert.Fail("Unrecognized type " + typeName + " in SerializationReference files");
}
Assert.AreEqual(json, roundTrip);
}
}
