org.xipki.security.bc.XiWrappedContentSigner Maven / Gradle / Ivy

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/*
 *
 * Copyright (c) 2013 - 2017 Lijun Liao
 *
 * 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 org.xipki.security.bc;

import java.io.IOException;
import java.io.OutputStream;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.operator.ContentSigner;
import org.xipki.common.util.ParamUtil;
import org.xipki.security.exception.XiSecurityException;

/**
 * @author Lijun Liao
 * @since 2.2.0
 */

public class XiWrappedContentSigner implements XiContentSigner {

    private byte[] encodedAlgorithmIdentifier;
    private ContentSigner signer;

    public XiWrappedContentSigner(ContentSigner signer, boolean fixedAlgorithmIdentifier)
            throws XiSecurityException {
        this.signer = ParamUtil.requireNonNull("signer",signer);
        if (fixedAlgorithmIdentifier) {
            try {
                this.encodedAlgorithmIdentifier = signer.getAlgorithmIdentifier().getEncoded();
            } catch (IOException ex) {
                throw new XiSecurityException("could not encode AlgorithmIdentifier", ex);
            }
        }
    }

    @Override
    public AlgorithmIdentifier getAlgorithmIdentifier() {
        return signer.getAlgorithmIdentifier();
    }

    @Override
    public byte[] getEncodedAlgorithmIdentifier() {
        if (encodedAlgorithmIdentifier != null) {
            return encodedAlgorithmIdentifier;
        }

        try {
            return signer.getAlgorithmIdentifier().getEncoded();
        } catch (IOException ex) {
            throw new RuntimeException("error encoding AlgorithmIdentifier", ex);
        }
    }

    @Override
    public OutputStream getOutputStream() {
        return signer.getOutputStream();
    }

    @Override
    public byte[] getSignature() {
        return signer.getSignature();
    }

}