Cert.java

//: "The contents of this file are subject to the Mozilla Public License
//: Version 1.1 (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.mozilla.org/MPL/
//:
//: Software distributed under the License is distributed on an "AS IS"
//: basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
//: License for the specific language governing rights and limitations
//: under the License.
//:
//: The Original Code is Guanxi (http://www.guanxi.uhi.ac.uk).
//:
//: The Initial Developer of the Original Code is Alistair Young alistair@codebrane.com
//: All Rights Reserved.
//:

package org.guanxi.common.security;

import javax.security.cert.X509Certificate;
import javax.security.cert.CertificateException;
import java.io.*;

/**
 * <font size=5><b></b></font>
 *
 * @author Alistair Young alistair@smo.uhi.ac.uk
 */
public class Cert {
  public static X509Certificate getCertificate(String certFilePath) {
    try {
      return getCertificate(new FileInputStream(new File(certFilePath)));
    }
    catch(FileNotFoundException fnfe) {
      return null;
    }
  }

  public static X509Certificate getCertificate(File certFile) {
    try {
      return getCertificate(new FileInputStream(certFile));
    }
    catch(FileNotFoundException fnfe) {
      return null;
    }
  }

  /**
   * Generates an X509 certificate from an input stream. Note that the
   * stream will be closed when this method returns
   *
   * @param in The stream to read from
   * @return X509 certificate generated from the stream
   */
  public static X509Certificate getCertificate(InputStream in) {
    try {
      return X509Certificate.getInstance(in);
    }
    catch(CertificateException se) {
      return null;
    }
    finally {
      try {
        in.close();
      }
      catch(IOException ioe) {
        // Closing the stream failed. Shouldn't stop us returning the cert though
      }
    }
  }
}