org.bouncycastle.cms.DefaultCMSSignatureEncryptionAlgorithmFinder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcpkix-fips Show documentation

The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.

There is a newer version: 2.0.7

Show newest version

package org.bouncycastle.cms;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.teletrust.TeleTrusTObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

public class DefaultCMSSignatureEncryptionAlgorithmFinder
    implements CMSSignatureEncryptionAlgorithmFinder
{
    private static final Set RSA_PKCS1d5 = new HashSet();
    private static final Map GOST_ENC = new HashMap();

    static
    {
        RSA_PKCS1d5.add(PKCSObjectIdentifiers.md2WithRSAEncryption);
        RSA_PKCS1d5.add(PKCSObjectIdentifiers.md4WithRSAEncryption);
        RSA_PKCS1d5.add(PKCSObjectIdentifiers.md5WithRSAEncryption);
        RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha1WithRSAEncryption);
        RSA_PKCS1d5.add(OIWObjectIdentifiers.md4WithRSAEncryption);
        RSA_PKCS1d5.add(OIWObjectIdentifiers.md4WithRSA);
        RSA_PKCS1d5.add(OIWObjectIdentifiers.md5WithRSA);
        RSA_PKCS1d5.add(OIWObjectIdentifiers.sha1WithRSA);
        RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
        RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
        RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);

        GOST_ENC.put(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001,
            new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, DERNull.INSTANCE));
//        GOST_ENC.put(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_256,
//            new AlgorithmIdentifier(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256, DERNull.INSTANCE));
//        GOST_ENC.put(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_512,
//            new AlgorithmIdentifier(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512, DERNull.INSTANCE));
    }

    public AlgorithmIdentifier findEncryptionAlgorithm(AlgorithmIdentifier signatureAlgorithm)
    {
               // RFC3370 section 3.2 with RFC 5754 update
        if (RSA_PKCS1d5.contains(signatureAlgorithm.getAlgorithm()))
        {
            return new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE);
        }
        // GOST signature encryption algorithms
        if (GOST_ENC.containsKey(signatureAlgorithm.getAlgorithm()))
        {
            return (AlgorithmIdentifier)GOST_ENC.get(signatureAlgorithm.getAlgorithm());
        }
        return signatureAlgorithm;
    }
}