/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. 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. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.examples.security;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.X509Certificate;
import org.apache.abdera.Abdera;
import org.apache.abdera.factory.Factory;
import org.apache.abdera.model.Document;
import org.apache.abdera.model.Entry;
import org.apache.abdera.security.AbderaSecurity;
import org.apache.abdera.security.Signature;
import org.apache.abdera.security.SignatureOptions;
public class DSig {
private static final String keystoreFile = "/key.jks";
private static final String keystoreType = "JKS";
private static final String keystorePass = "testing";
private static final String privateKeyAlias = "James";
private static final String privateKeyPass = "testing";
private static final String certificateAlias = "James";
public static void main(String[] args) throws Exception {
// Initialize the keystore
KeyStore ks = KeyStore.getInstance(keystoreType);
InputStream in = DSig.class.getResourceAsStream(keystoreFile);
ks.load(in, keystorePass.toCharArray());
PrivateKey signingKey = (PrivateKey)ks.getKey(privateKeyAlias, privateKeyPass.toCharArray());
X509Certificate cert = (X509Certificate)ks.getCertificate(certificateAlias);
// Create the entry to sign
Abdera abdera = new Abdera();
AbderaSecurity absec = new AbderaSecurity(abdera);
Factory factory = abdera.getFactory();
Entry entry = factory.newEntry();
entry.setId("http://example.org/foo/entry");
entry.setUpdated(new java.util.Date());
entry.setTitle("This is an entry");
entry.setContentAsXhtml("This <b>is</b> <i>markup</i>");
entry.addAuthor("James");
entry.addLink("http://www.example.org");
// Prepare the digital signature options
Signature sig = absec.getSignature();
SignatureOptions options = sig.getDefaultSignatureOptions();
options.setCertificate(cert);
options.setSigningKey(signingKey);
// Sign the entry
entry = sig.sign(entry, options);
// Check the round trip
ByteArrayOutputStream out = new ByteArrayOutputStream();
entry.writeTo(out); // do not use the pretty writer, it will break the signature
ByteArrayInputStream bais = new ByteArrayInputStream(out.toByteArray());
Document<Entry> entry_doc = abdera.getParser().parse(bais);
entry = entry_doc.getRoot();
System.out.println("Valid? " + sig.verify(entry, null));
entry.setTitle("Change the title");
System.out.println("Valid after changing the title? " + sig.verify(entry, null));
entry = sig.removeInvalidSignatures(entry, options);
}
}