org.jpedal.io.SetSecurity Maven / Gradle / Ivy
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/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/java-pdf-library-support/
*
* (C) Copyright 1997-2013, IDRsolutions and Contributors.
*
* This file is part of JPedal
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* SetSecurity.java
* ---------------
*/
package org.jpedal.io;
import java.security.Key;
import java.security.Security;
import java.security.cert.Certificate;
import org.jpedal.utils.LogWriter;
public class SetSecurity {
private static String altSP = null;
public static void init() {
// allow user to over-ride
altSP = System.getProperty("org.jpedal.securityprovider");
if (altSP == null) altSP = "org.bouncycastle.jce.provider.BouncyCastleProvider";
try {
Class c = Class.forName(altSP);
java.security.Provider provider = (java.security.Provider) c.newInstance();
Security.addProvider(provider);
}
catch (Exception e) {
if (LogWriter.isOutput()) {
LogWriter.writeLog("Unable to run custom security provider " + altSP + " Exception " + e);
}
throw new RuntimeException("This PDF file is encrypted and JPedal needs an additional library to \n"
+ "decode on the classpath (we recommend bouncycastle library).\n"
+ "There is additional explanation at http://www.idrsolutions.com/additional-jars" + '\n');
}
}
/**
* cycle through all possible values to find match (only tested with Bouncy castle)
*
* @param certificate
* @param key
*/
public static byte[] extractCertificateData(byte[][] recipients, Certificate certificate, Key key) {
// break if not bc
if (altSP == null || !altSP.equals("org.bouncycastle.jce.provider.BouncyCastleProvider")) throw new RuntimeException(
"only Bouncy castle currently supported with certificates");
byte[] envelopedData = null;
//
// Adobe do not use Bouncy castle and only added for that
envelopedData = CertificateReader.readCertificate(recipients, certificate, key);
//
return envelopedData;
}
}