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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for the Android platform. Android unfortunately ships with a stripped-down version of Bouncy Castle, which prevents easy upgrades - Spongy Castle overcomes this and provides a full, up-to-date version of the Bouncy Castle cryptographic libs.

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package org.spongycastle.jcajce.provider.util;

import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.jcajce.provider.config.ConfigurableProvider;

public abstract class AsymmetricAlgorithmProvider
    extends AlgorithmProvider
{       
    protected void addSignatureAlgorithm(
        ConfigurableProvider provider,
        String digest,
        String algorithm,
        String className,
        ASN1ObjectIdentifier oid)
    {
        String mainName = digest + "WITH" + algorithm;
        String jdk11Variation1 = digest + "with" + algorithm;
        String jdk11Variation2 = digest + "With" + algorithm;
        String alias = digest + "/" + algorithm;

        provider.addAlgorithm("Signature." + mainName, className);
        provider.addAlgorithm("Alg.Alias.Signature." + jdk11Variation1, mainName);
        provider.addAlgorithm("Alg.Alias.Signature." + jdk11Variation2, mainName);
        provider.addAlgorithm("Alg.Alias.Signature." + alias, mainName);
        provider.addAlgorithm("Alg.Alias.Signature." + oid, mainName);
        provider.addAlgorithm("Alg.Alias.Signature.OID." + oid, mainName);
    }

    protected void registerOid(ConfigurableProvider provider, ASN1ObjectIdentifier oid, String name, AsymmetricKeyInfoConverter keyFactory)
    {
        provider.addAlgorithm("Alg.Alias.KeyFactory." + oid, name);
        provider.addAlgorithm("Alg.Alias.KeyPairGenerator." + oid, name);

        provider.addKeyInfoConverter(oid, keyFactory);
    }

    protected void registerOidAlgorithmParameters(ConfigurableProvider provider, ASN1ObjectIdentifier oid, String name)
    {
        provider.addAlgorithm("Alg.Alias.AlgorithmParameters." + oid, name);
    }

    protected void registerOidAlgorithmParameterGenerator(ConfigurableProvider provider, ASN1ObjectIdentifier oid, String name)
    {
        provider.addAlgorithm("Alg.Alias.AlgorithmParameterGenerator." + oid, name);
        provider.addAlgorithm("Alg.Alias.AlgorithmParameters." + oid, name);
    }
}