SDitH KeyFactory does not support THRESHOLD keySpecs

[tonywasher]

When running tests against the new SDitH support on main the following error occurs when attempting to parse an X509PublicKeySpec for an SDitH keyPair for any of the threshold keyPair types.

Caused by: java.security.spec.InvalidKeySpecException: incorrect algorithm OID for key: 1.3.6.1.4.1.22554.2.16.7
	at org.bouncycastle.provider/org.bouncycastle.pqc.jcajce.provider.util.BaseKeyFactorySpi.checkAlgorithm(Unknown Source)
	at org.bouncycastle.provider/org.bouncycastle.pqc.jcajce.provider.util.BaseKeyFactorySpi.engineGeneratePublic(Unknown Source)
	at java.base/java.security.KeyFactory.generatePublic(KeyFactory.java:345)

This would appear to be caused by SDitHKeyFactorySpi only listing the hypercube OIDs for support and missing out the threshold OIDs

static
    {
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat1_gf256);
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat3_gf256);
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat5_gf256);
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat1_p251);
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat3_p251);
        keyOids.add(BCObjectIdentifiers.sdith_hypercube_cat5_p251);
    }

[dghgit]

Thanks for the report, I think is now fixed, update on https://www.bouncycastle.org/betas Let us know how it goes.