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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.eac.operator.jcajce;

import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Signature;
import java.util.Hashtable;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.eac.EACObjectIdentifiers;

abstract class EACHelper
{
    private static final Hashtable sigNames = new Hashtable();

    static
    {
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_v1_5_SHA_1, "SHA1withRSA");
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_v1_5_SHA_256, "SHA256withRSA");
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_PSS_SHA_1, "SHA1withRSAandMGF1");
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_PSS_SHA_256, "SHA256withRSAandMGF1");
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_v1_5_SHA_512, "SHA512withRSA");
        sigNames.put(EACObjectIdentifiers.id_TA_RSA_PSS_SHA_512, "SHA512withRSAandMGF1");

        sigNames.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_1, "SHA1withECDSA");
        sigNames.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_224, "SHA224withECDSA");
        sigNames.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_256, "SHA256withECDSA");
        sigNames.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_384, "SHA384withECDSA");
        sigNames.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_512, "SHA512withECDSA");
    }

    public Signature getSignature(ASN1ObjectIdentifier oid)
        throws NoSuchProviderException, NoSuchAlgorithmException
    {
        return createSignature((String)sigNames.get(oid));
    }

    protected abstract Signature createSignature(String type)
        throws NoSuchProviderException, NoSuchAlgorithmException;
}