dorkbox.util.crypto.signers.BcECDSAContentSignerBuilder Maven / Gradle / Ivy

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/*
 * Copyright 2013 dorkbox, llc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dorkbox.util.crypto.signers;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.Signer;
import org.bouncycastle.crypto.signers.DSADigestSigner;
import org.bouncycastle.crypto.signers.ECDSASigner;
import org.bouncycastle.jcajce.provider.util.DigestFactory;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.bc.BcContentSignerBuilder;

public
class BcECDSAContentSignerBuilder extends BcContentSignerBuilder {

    public
    BcECDSAContentSignerBuilder(AlgorithmIdentifier sigAlgId, AlgorithmIdentifier digAlgId) {
        super(sigAlgId, digAlgId);
    }

    @Override
    protected
    Signer createSigner(AlgorithmIdentifier sigAlgId, AlgorithmIdentifier digAlgId) throws OperatorCreationException {
        Digest digest = DigestFactory.getDigest(digAlgId.getAlgorithm()
                                                        .getId()); // SHA1, SHA512, etc

        return new DSADigestSigner(new ECDSASigner(), digest);
    }
}