be.fedict.eid.pkira.crypto.csr.CSRParserImpl.java Source code

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Here is the source code for be.fedict.eid.pkira.crypto.csr.CSRParserImpl.java

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/*
 * eID PKI RA Project.
 * Copyright (C) 2010-2014 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see
 * http://www.gnu.org/licenses/.
 */
package be.fedict.eid.pkira.crypto.csr;

import java.io.IOException;
import java.io.StringReader;

import org.bouncycastle.jce.PKCS10CertificationRequest;
import org.bouncycastle.openssl.PEMReader;

import be.fedict.eid.pkira.crypto.exception.CryptoException;
import be.fedict.eid.pkira.crypto.util.BouncyCastleProviderUser;

/**
 * Class used to parse a CSR and extract the required fields.
 * 
 * @author Jan Van den Bergh
 */
public class CSRParserImpl extends BouncyCastleProviderUser implements CSRParser {

    /**
     * {@inheritDoc}
     */
    @Override
    public CSRInfo parseCSR(byte[] csr) throws CryptoException {
        return extractCSRInfo(new PKCS10CertificationRequest(csr));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public CSRInfo parseCSR(String csr) throws CryptoException {
        PEMReader reader = new PEMReader(new StringReader(csr));
        Object pemObject;
        try {
            pemObject = reader.readObject();
            reader.close();
        } catch (IOException e) {
            throw new CryptoException("Could not read CSR from string: " + e.getMessage(), e);
        }

        if (pemObject instanceof PKCS10CertificationRequest) {
            PKCS10CertificationRequest certificationRequest = (PKCS10CertificationRequest) pemObject;
            return extractCSRInfo(certificationRequest);
        }

        throw new CryptoException("No CSR found.");
    }

    private CSRInfo extractCSRInfo(PKCS10CertificationRequest certificationRequest) throws CryptoException {
        try {
            if (!certificationRequest.verify()) {
                throw new CryptoException("CSR signature is not correct.");
            }
        } catch (Exception e) {
            throw new CryptoException("Cannot verify CSR signature: " + e.getMessage(), e);
        }

        return new CSRInfo(certificationRequest);
    }

}