org.xdi.oxauth.util.CertUtil.java Source code

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Here is the source code for org.xdi.oxauth.util.CertUtil.java

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/*
 * oxAuth is available under the MIT License (2008). See http://opensource.org/licenses/MIT for full text.
 *
 * Copyright (c) 2014, Gluu
 */

package org.xdi.oxauth.util;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.jboss.seam.log.Log;
import org.jboss.seam.log.Logging;
import org.xdi.util.StringHelper;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.List;

/**
 * @author Yuriy Movchan
 * @version March 11, 2016
 */
public class CertUtil {

    private final static Log log = Logging.getLog(CertUtil.class);

    private CertUtil() {
    }

    @SuppressWarnings("unchecked")
    public static List<X509Certificate> loadX509CertificateFromFile(String filePath) {
        if (StringHelper.isEmpty(filePath)) {
            log.error("X509Certificate file path is empty");

            return null;
        }

        InputStream is;
        try {
            is = FileUtils.openInputStream(new File(filePath));
        } catch (IOException ex) {
            log.error("Failed to read X.509 certificates from file: '" + filePath + "'", ex);
            return null;
        }

        List<X509Certificate> certificates = null;
        try {
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            certificates = (List<X509Certificate>) cf.generateCertificates(is);
        } catch (CertificateException ex) {
            log.error("Failed to parse X.509 certificates from file: '" + filePath + "'", ex);
        } finally {
            IOUtils.closeQuietly(is);
        }

        return certificates;
    }

    public static X509Certificate x509CertificateFromBytes(byte[] cert) {
        try {
            CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
            InputStream bais = new ByteArrayInputStream(cert);

            return (X509Certificate) certFactory.generateCertificate(bais);
        } catch (CertificateException ex) {
            log.error("Failed to parse X.509 certificates from bytes", ex);
        }

        return null;
    }

}