Examples of org.bouncycastle.pqc.crypto.gmss.util.WinternitzOTSVerify

            // underlying root
            // and reuse this signature to compute the first leaf of acual layer
            // more efficiently (by verifiing the signature)
            ots = new WinternitzOTSignature(OTSseed, digestProvider.get(), otsIndex[h]);
            currentRootSigs[h] = ots.getSignature(lowerRoot);
            WinternitzOTSVerify otsver = new WinternitzOTSVerify(digestProvider.get(), otsIndex[h]);
            help = otsver.Verify(lowerRoot, currentRootSigs[h]);
        }
        // update the tree with the first leaf
        treeToConstruct.update(help);


        int seedForTreehashIndex = 3;

    {


        boolean success = false;
        // int halfSigLength = signature.length >>> 1;
        messDigestOTS.reset();
        WinternitzOTSVerify otsVerify;
        int otsSigLength;


        byte[] help = message;


        byte[] otsSig;
        byte[] otsPublicKey;
        byte[][] authPath;
        byte[] dest;
        int nextEntry = 0;
        int index;
        // Verify signature


        // --- begin with message = 'message that was signed'
        // and then in each step message = subtree root
        for (int j = numLayer - 1; j >= 0; j--)
        {
            otsVerify = new WinternitzOTSVerify(digestProvider.get(), gmssPS.getWinternitzParameter()[j]);
            otsSigLength = otsVerify.getSignatureLength();


            message = help;
            // get the subtree index
            index = gmssUtil.bytesToIntLittleEndian(signature, nextEntry);


            // 4 is the number of bytes in integer
            nextEntry += 4;


            // get one-time signature
            otsSig = new byte[otsSigLength];
            System.arraycopy(signature, nextEntry, otsSig, 0, otsSigLength);
            nextEntry += otsSigLength;


            // compute public OTS key from the one-time signature
            otsPublicKey = otsVerify.Verify(message, otsSig);


            // test if OTSsignature is correct
            if (otsPublicKey == null)
            {
                System.err.println("OTS Public Key is null in GMSSSignature.verify");

Examples of org.bouncycastle.pqc.crypto.gmss.util.WinternitzOTSVerify

Related Classes of org.bouncycastle.pqc.crypto.gmss.util.WinternitzOTSVerify