org.xipki.security.bcext.BcRSAContentVerifierProviderBuilder.java Source code

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Here is the source code for org.xipki.security.bcext.BcRSAContentVerifierProviderBuilder.java

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/*
 *
 * This file is part of the XiPKI project.
 * Copyright (c) 2014 - 2015 Lijun Liao
 * Author: 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.security.bcext;

import java.io.IOException;

import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.Signer;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.signers.RSADigestSigner;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.operator.DigestAlgorithmIdentifierFinder;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.bc.BcContentVerifierProviderBuilder;
import org.xipki.security.SignerUtil;

/**
 * Copied from BouncyCastle under license MIT
 *
 * @author Lijun Liao
 */

public class BcRSAContentVerifierProviderBuilder extends BcContentVerifierProviderBuilder {
    private DigestAlgorithmIdentifierFinder digestAlgorithmFinder;

    public BcRSAContentVerifierProviderBuilder(final DigestAlgorithmIdentifierFinder digestAlgorithmFinder) {
        this.digestAlgorithmFinder = digestAlgorithmFinder;
    }

    protected Signer createSigner(final AlgorithmIdentifier sigAlgId) throws OperatorCreationException {
        AlgorithmIdentifier digAlgId = digestAlgorithmFinder.find(sigAlgId);
        Digest dig = digestProvider.get(digAlgId);

        if (PKCSObjectIdentifiers.id_RSASSA_PSS.equals(sigAlgId.getAlgorithm())) {
            return SignerUtil.createPSSRSASigner(sigAlgId);
        } else {
            return new RSADigestSigner(dig);
        }
    }

    protected AsymmetricKeyParameter extractKeyParameters(final SubjectPublicKeyInfo publicKeyInfo)
            throws IOException {
        return PublicKeyFactory.createKey(publicKeyInfo);
    }
}