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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.
package org.bouncycastle.pqc.crypto.picnic;
class Signature
{
final byte[] challengeBits;
final byte[] salt;
final Proof[] proofs;
Signature(PicnicEngine engine)
{
salt = new byte[PicnicEngine.saltSizeBytes];
challengeBits = new byte[Utils.numBytes(engine.numMPCRounds * 2)];
proofs = new Proof[engine.numMPCRounds];
for (int i = 0; i < proofs.length; i++)
{
proofs[i] = new Proof(engine);
}
}
public static class Proof
{
final byte[] seed1;
final byte[] seed2;
final int[] inputShare; // Input share of the party which does not derive it from the seed (not included if challenge is 0)
final byte[] communicatedBits;
final byte[] view3Commitment;
final byte[] view3UnruhG; // we include the max length, but we will only serialize the bytes we use
Proof(PicnicEngine engine)
{
seed1 = new byte[engine.seedSizeBytes];
seed2 = new byte[engine.seedSizeBytes];
inputShare = new int[engine.stateSizeWords];
communicatedBits = new byte[engine.andSizeBytes];
view3Commitment = new byte[engine.digestSizeBytes];
if (engine.UnruhGWithInputBytes > 0)
{
view3UnruhG = new byte[engine.UnruhGWithInputBytes];
}
else
{
view3UnruhG = null;
}
}
}
}