public Task <PreprocessedSenderBatch> PreprocessSenderAsync(IMessageChannel channel, int numberOfInvocations)
{
byte[] randomOptionsBuffer = _randomNumberGenerator.GetBytes(BitQuadrupleArray.RequiredBytes(numberOfInvocations));
BitQuadrupleArray randomOptions = BitQuadrupleArray.FromBytes(randomOptionsBuffer, numberOfInvocations);
return(_obliviousTransfer.SendAsync(channel, randomOptions, numberOfInvocations)
.ContinueWith(task => new PreprocessedSenderBatch(randomOptions)));
}
private async Task <BitArray> ComputeSenderSharesAsync(IMessageChannel channel, BitArray leftShares, BitArray rightShares, int numberOfInvocations)
{
BitArray randomShares = _randomNumberGenerator.GetBits(numberOfInvocations);
BitQuadrupleArray options = new BitQuadrupleArray(numberOfInvocations);
for (int i = 0; i < numberOfInvocations; ++i)
{
options[i] = new BitQuadruple(
randomShares[i], // 00
randomShares[i] ^ leftShares[i], // 01
randomShares[i] ^ rightShares[i], // 10
randomShares[i] ^ leftShares[i] ^ rightShares[i] // 11
);
}
await _obliviousTransfer.SendAsync(channel, options, numberOfInvocations);
return(randomShares);
}
