Github user brosander commented on a diff in the pull request:
https://github.com/apache/nifi/pull/695#discussion_r72882313
--- Diff:
nifi-toolkit/nifi-toolkit-tls/src/main/java/org/apache/nifi/toolkit/tls/service/TlsCertificateAuthorityClientSocketFactory.java
---
@@ -0,0 +1,77 @@
+/*
+ * 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.nifi.toolkit.tls.service;
+
+import org.apache.http.HttpHost;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.protocol.HttpContext;
+import org.bouncycastle.asn1.x500.style.BCStyle;
+import org.bouncycastle.asn1.x500.style.IETFUtils;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocket;
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.security.cert.X509Certificate;
+import java.util.List;
+
+/**
+ * Socket Factory validates that it is talking to a RootCa claiming to
have the given hostname. It adds the certificate
+ * to a list for later validation against the payload's hmac
+ */
+public class TlsCertificateAuthorityClientSocketFactory extends
SSLConnectionSocketFactory {
+ private final String caHostname;
+ private final List<X509Certificate> certificates;
+
+ public TlsCertificateAuthorityClientSocketFactory(SSLContext
sslContext, String caHostname, List<X509Certificate> certificates) {
+ super(sslContext);
+ this.caHostname = caHostname;
+ this.certificates = certificates;
+ }
+
+ @Override
+ public synchronized Socket connectSocket(int connectTimeout, Socket
socket, HttpHost host, InetSocketAddress remoteAddress,
+ InetSocketAddress
localAddress, HttpContext context) throws IOException {
+ Socket result = super.connectSocket(connectTimeout, socket, host,
remoteAddress, localAddress, context);
+ if (!SSLSocket.class.isInstance(result)) {
+ throw new IOException("Expected tls socket");
+ }
+ SSLSocket sslSocket = (SSLSocket) result;
+ java.security.cert.Certificate[] peerCertificateChain =
sslSocket.getSession().getPeerCertificates();
+ if (peerCertificateChain.length != 1) {
+ throw new IOException("Expected root ca cert");
+ }
+ if (!X509Certificate.class.isInstance(peerCertificateChain[0])) {
+ throw new IOException("Expected root ca cert in X509 format");
+ }
+ String cn;
+ try {
+ X509Certificate certificate = (X509Certificate)
peerCertificateChain[0];
+ cn = IETFUtils.valueToString(new
JcaX509CertificateHolder(certificate).getSubject().getRDNs(BCStyle.CN)[0].getFirst().getValue());
--- End diff --
I'm not really interested in the whole dn, only the cn to let the client
check the the CA at least claims to be the right one.
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