/*
*
* Copyright (c) 2013 - 2017 Lijun Liao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
*
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the XiPKI software without
* disclosing the source code of your own applications.
*
* For more information, please contact Lijun Liao at this
* address: lijun.liao@gmail.com
*/
package org.xipki.pki.scep.message;
import java.util.ArrayList;
import java.util.List;
import org.bouncycastle.cms.CMSEnvelopedData;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.RecipientInformation;
import org.bouncycastle.cms.RecipientInformationStore;
import org.xipki.commons.common.util.ParamUtil;
import org.xipki.pki.scep.exception.MessageDecodingException;
/**
* @author Lijun Liao
* @since 2.0.0
*/
public final class EnvelopedDataDecryptor {
private final List<EnvelopedDataDecryptorInstance> decryptors;
public EnvelopedDataDecryptor(final List<EnvelopedDataDecryptorInstance> decryptors) {
ParamUtil.requireNonEmpty("decryptors", decryptors);
this.decryptors = new ArrayList<EnvelopedDataDecryptorInstance>(decryptors);
}
public EnvelopedDataDecryptor(final EnvelopedDataDecryptorInstance decryptor) {
ParamUtil.requireNonNull("decryptor", decryptor);
this.decryptors = new ArrayList<EnvelopedDataDecryptorInstance>(1);
this.decryptors.add(decryptor);
}
public byte[] decrypt(final CMSEnvelopedData envData) throws MessageDecodingException {
ParamUtil.requireNonNull("envData", envData);
final RecipientInformationStore recipientInfos = envData.getRecipientInfos();
RecipientInformation recipientInfo = null;
EnvelopedDataDecryptorInstance decryptor = null;
for (EnvelopedDataDecryptorInstance m : decryptors) {
recipientInfo = recipientInfos.get(m.getRecipientId());
if (recipientInfo != null) {
decryptor = m;
break;
}
}
if (recipientInfo == null || decryptor == null) {
throw new MessageDecodingException("missing expected key transfer recipient");
}
try {
return recipientInfo.getContent(decryptor.getRecipient());
} catch (CMSException ex) {
throw new MessageDecodingException("could not decrypt the envelopedData");
}
}
}