org.apache.tika.parser.crypto.Pkcs7Parser Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tika.parser.crypto;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
import org.apache.commons.io.input.CloseShieldInputStream;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.EmptyParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSSignedDataParser;
import org.bouncycastle.cms.CMSTypedStream;
import org.bouncycastle.operator.DigestCalculatorProvider;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* Basic parser for PKCS7 data.
*/
public class Pkcs7Parser extends AbstractParser {
/** Serial version UID */
private static final long serialVersionUID = -7310531559075115044L;
private static final MediaType PKCS7_MIME =
MediaType.application("pkcs7-mime");
private static final MediaType PKCS7_SIGNATURE =
MediaType.application("pkcs7-signature");
public Set getSupportedTypes(ParseContext context) {
return MediaType.set(PKCS7_MIME, PKCS7_SIGNATURE);
}
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
try {
DigestCalculatorProvider digestCalculatorProvider =
new JcaDigestCalculatorProviderBuilder().setProvider("BC").build();
CMSSignedDataParser parser =
new CMSSignedDataParser(digestCalculatorProvider, new CloseShieldInputStream(stream));
try {
CMSTypedStream content = parser.getSignedContent();
if (content == null) {
throw new TikaException("cannot parse detached pkcs7 signature (no signed data to parse)");
}
try (InputStream input = content.getContentStream()) {
Parser delegate =
context.get(Parser.class, EmptyParser.INSTANCE);
delegate.parse(input, handler, metadata, context);
}
} finally {
parser.close();
}
} catch (OperatorCreationException e) {
throw new TikaException("Unable to create DigestCalculatorProvider", e);
} catch (CMSException e) {
throw new TikaException("Unable to parse pkcs7 signed data", e);
}
}
}