/*
 *
 * Copyright (c) 2013 - 2017 Lijun Liao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 *
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the XiPKI software without
 * disclosing the source code of your own applications.
 *
 * For more information, please contact Lijun Liao at this
 * address: lijun.liao@gmail.com
 */

package org.xipki.commons.security.bcbugfix;

import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.Signer;
import org.bouncycastle.crypto.signers.RSADigestSigner;
import org.bouncycastle.operator.DigestAlgorithmIdentifierFinder;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.bc.BcRSAContentVerifierProviderBuilder;
import org.xipki.commons.security.exception.XiSecurityException;
import org.xipki.commons.security.util.SignerUtil;

/**
 * @author Lijun Liao
 * @since 2.1.0
 */

// CHECKSTYLE:SKIP
public class XipkiRSAContentVerifierProviderBuilder extends BcRSAContentVerifierProviderBuilder {
    private DigestAlgorithmIdentifierFinder digestAlgorithmFinder;

    public XipkiRSAContentVerifierProviderBuilder(
            DigestAlgorithmIdentifierFinder digestAlgorithmFinder) {
        super(digestAlgorithmFinder);
        this.digestAlgorithmFinder = digestAlgorithmFinder;
    }

    @Override
    protected Signer createSigner(AlgorithmIdentifier sigAlgId) throws OperatorCreationException {
        if (PKCSObjectIdentifiers.id_RSASSA_PSS.equals(sigAlgId.getAlgorithm())) {
            try {
                return SignerUtil.createPSSRSASigner(sigAlgId);
            } catch (XiSecurityException ex) {
                throw new OperatorCreationException(ex.getMessage(), ex);
            }
        } else {
            AlgorithmIdentifier digAlg = digestAlgorithmFinder.find(sigAlgId);
            Digest dig = digestProvider.get(digAlg);

            return new RSADigestSigner(dig);
        }
    }

}