eu.europa.esig.dss.crl.PemToDerConverter Maven / Gradle / Ivy
/**
* DSS - Digital Signature Services
* Copyright (C) 2015 European Commission, provided under the CEF programme
*
* This file is part of the "DSS - Digital Signature Services" project.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package eu.europa.esig.dss.crl;
import eu.europa.esig.dss.model.DSSException;
import org.bouncycastle.util.io.pem.PemObject;
import org.bouncycastle.util.io.pem.PemReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
/**
* This class is used to convert PEM encoded binaries (CRL, Cert) to DER encoded representation
*
*/
public final class PemToDerConverter {
private PemToDerConverter() {
// empty
}
/**
* Converts PEM encoded binaries to DER encoded equivalent
*
* @param pemEncoded the PEM encoded byte array
* @return DER encoded byte array
*/
public static byte[] convert(final byte[] pemEncoded) {
try (ByteArrayInputStream bais = new ByteArrayInputStream(pemEncoded);
Reader reader = new InputStreamReader(bais);
PemReader pemReader = new PemReader(reader);
ByteArrayOutputStream os = new ByteArrayOutputStream()) {
PemObject pemObject = pemReader.readPemObject();
if (pemObject == null) {
throw new DSSException("Unable to read PEM Object");
}
byte[] binaries = pemObject.getContent();
os.write(binaries, 0, binaries.length);
return os.toByteArray();
} catch (IOException e) {
throw new DSSException("Unable to convert the CRL to DER", e);
}
}
}