private static void RunSecureComputationParty(int startPort, int numberOfParties, int localPartyId, BitArray localInput, BitArray expectedOutput)
{
using (IMultiPartyNetworkSession session = TestNetworkSession.EstablishMultiParty(localPartyId, numberOfParties))
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
IObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer(
new SecurityParameters(47, 23, 4, 1, 1),
cryptoContext
);
IMultiplicativeSharing multiplicativeSharing = new ObliviousTransferMultiplicativeSharing(
obliviousTransfer,
cryptoContext
);
GMWSecureComputation computation = new GMWSecureComputation(session, multiplicativeSharing, cryptoContext);
SetIntersectionCircuitRecorder circuitRecorder = new SetIntersectionCircuitRecorder(numberOfParties, localInput.Length);
CircuitBuilder circuitBuilder = new CircuitBuilder();
circuitRecorder.Record(circuitBuilder);
ForwardCircuit circuit = new ForwardCircuit(circuitBuilder.CreateCircuit());
BitArray output = computation.EvaluateAsync(circuit, circuitRecorder.InputMapping, circuitRecorder.OutputMapping, localInput).Result;
CollectionAssert.AreEqual(
expectedOutput,
output,
"Incorrect output {0} (should be {1}).",
output.ToBinaryString(),
expectedOutput.ToBinaryString()
);
}
}
}
private void RunObliviousTransferParty1oo2Resumed()
{
const int numberOfInvocations = 3;
const int numberOfOptions = 2;
Pair <byte[]>[] options = new Pair <byte[]> [numberOfInvocations];
options = new Pair <byte[]>[]
{
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s)).ToArray()),
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToLower())).ToArray()),
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToUpper())).ToArray()),
};
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (ITwoPartyNetworkSession session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesObliviousTransferChannel obliviousTransfer = new TwoChoicesExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
if (session.LocalParty.Id == 0)
{
for (int i = 0; i < 2; ++i)
{
obliviousTransfer.SendAsync(options, numberOfInvocations, 6).Wait();
}
}
else
{
PairIndexArray[] allIndices = new[] { new PairIndexArray(new[] { 0, 1, 0 }), new PairIndexArray(new[] { 1, 0, 0 }) };
for (int i = 0; i < 2; ++i)
{
PairIndexArray indices = allIndices[i];
byte[][] results = obliviousTransfer.ReceiveAsync(indices, numberOfInvocations, 6).Result;
Assert.IsNotNull(results, "Result is null.");
Assert.AreEqual(numberOfInvocations, results.Length, "Result does not match the correct number of invocations.");
for (int j = 0; j < numberOfInvocations; ++j)
{
CollectionAssert.AreEqual(
results[j],
options[j][indices[j]],
"Incorrect message content {0} (should be {1}).",
Encoding.ASCII.GetString(results[j]),
Encoding.ASCII.GetString(options[j][indices[j]])
);
}
}
}
}
}
}
private byte[][] RunObliviousTransferReceiverParty(BitArray selectionBits)
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (var session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesCorrelatedObliviousTransferChannel obliviousTransfer = new TwoChoicesCorrelatedExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
return(obliviousTransfer.ReceiveAsync(selectionBits, selectionBits.Length, NumberOfMessageBytes).Result);
}
}
}
private Pair <byte[]>[] RunObliviousTransferSenderParty(int numberOfInvocations)
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (ITwoPartyNetworkSession session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesRandomObliviousTransferChannel obliviousTransfer = new TwoChoicesRandomExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
return(obliviousTransfer.SendAsync(numberOfInvocations, NumberOfMessageBytes).Result);
}
}
}
private Pair <byte[]>[] RunObliviousTransferSenderParty(byte[][] correlationStrings)
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (var session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesCorrelatedObliviousTransferChannel obliviousTransfer = new TwoChoicesCorrelatedExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
return(obliviousTransfer.SendAsync(
correlationStrings, correlationStrings.Length, NumberOfMessageBytes).Result);
}
}
}
private void RunObliviousTransferParty1oo2()
{
const int numberOfInvocations = 3;
const int numberOfOptions = 2;
Pair <byte[]>[] options = new Pair <byte[]> [numberOfInvocations];
options = new Pair <byte[]>[]
{
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s)).ToArray()),
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToLower())).ToArray()),
new Pair <byte[]>(TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToUpper())).ToArray()),
};
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
IStatelessTwoChoicesObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer(
SecurityParameters.CreateDefault768Bit(),
cryptoContext
);
using (ITwoPartyNetworkSession session = TestNetworkSession.EstablishTwoParty())
{
if (session.LocalParty.Id == 0)
{
obliviousTransfer.SendAsync(session.Channel, options, numberOfInvocations, 6).Wait();
}
else
{
PairIndexArray indices = new PairIndexArray(new[] { 0, 1, 0 });
byte[][] results = obliviousTransfer.ReceiveAsync(session.Channel, indices, numberOfInvocations, 6).Result;
Assert.IsNotNull(results, "Result is null.");
Assert.AreEqual(numberOfInvocations, results.Length, "Result does not match the correct number of invocations.");
for (int j = 0; j < numberOfInvocations; ++j)
{
CollectionAssert.AreEqual(
results[j],
options[j][indices[j]],
"Incorrect message content {0} (should be {1}).",
Encoding.ASCII.GetString(results[j]),
Encoding.ASCII.GetString(options[j][indices[j]])
);
}
}
}
}
}
private Pair <Pair <byte[]>[]> RunResumedObliviousTransferSenderParty(byte[][] firstCorrelationStrings, byte[][] secondCorrelationStrings)
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (var session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesCorrelatedObliviousTransferChannel obliviousTransfer = new TwoChoicesCorrelatedExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
Pair <byte[]>[] firstRoundResults = obliviousTransfer.SendAsync(
firstCorrelationStrings, firstCorrelationStrings.Length, NumberOfMessageBytes).Result;
Pair <byte[]>[] secondRoundResults = obliviousTransfer.SendAsync(
secondCorrelationStrings, secondCorrelationStrings.Length, NumberOfMessageBytes).Result;
return(new Pair <Pair <byte[]>[]>(firstRoundResults, secondRoundResults));
}
}
}
private Pair <byte[][]> RunResumedObliviousTransferReceiverParty(BitArray firstRoundSelectionBits, BitArray secondRoundSelectionBits)
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
using (ITwoPartyNetworkSession session = TestNetworkSession.EstablishTwoParty())
{
ITwoChoicesObliviousTransferChannel baseOT = new StatelessTwoChoicesObliviousTransferChannel(new InsecureObliviousTransfer(), session.Channel);
ITwoChoicesRandomObliviousTransferChannel obliviousTransfer = new TwoChoicesRandomExtendedObliviousTransferChannel(baseOT, 8, cryptoContext);
byte[][] firstRoundResults = obliviousTransfer.ReceiveAsync(
firstRoundSelectionBits, firstRoundSelectionBits.Length, NumberOfMessageBytes).Result;
byte[][] secondRoundResults = obliviousTransfer.ReceiveAsync(
secondRoundSelectionBits, secondRoundSelectionBits.Length, NumberOfMessageBytes).Result;
return(new Pair <byte[][]>(firstRoundResults, secondRoundResults));
}
}
}
private void RunInsecureObliviousTransferParty1oo6()
{
const int numberOfInvocations = 4;
const int numberOfOptions = 6;
byte[][][] options = new byte[][][]
{
TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s)).ToArray(),
TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToLower())).ToArray(),
TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToUpper())).ToArray(),
TestOptions.Take(numberOfOptions).Select(s => Encoding.ASCII.GetBytes(s.ToUpper())).ToArray(),
};
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
InsecureObliviousTransfer obliviousTransfer = new InsecureObliviousTransfer();
using (ITwoPartyNetworkSession session = TestNetworkSession.EstablishTwoParty())
{
if (session.LocalParty.Id == 0)
{
obliviousTransfer.SendAsync(session.Channel, options, numberOfOptions, numberOfInvocations, 6).Wait();
}
else
{
int[] indices = new[] { 4, 1, 3, 5 };
byte[][] results = obliviousTransfer.ReceiveAsync(session.Channel, indices, numberOfOptions, numberOfInvocations, 6).Result;
Assert.IsNotNull(results, "Result is null.");
Assert.AreEqual(numberOfInvocations, results.Length, "Result does not match the correct number of invocations.");
for (int j = 0; j < numberOfInvocations; ++j)
{
CollectionAssert.AreEqual(
results[j],
options[j][indices[j]],
"Incorrect message content {0} (should be {1}).",
Encoding.ASCII.GetString(results[j]),
Encoding.ASCII.GetString(options[j][indices[j]])
);
}
}
}
}
}