HBASE-28336 Correctly cast array of Certificates to array of X509Cert…

…ificates (#5658)

Signed-off-by: Bryan Beaudreault <bbeaudreault@apache.org>

hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/NettyRpcServer.java

@@ -416,33 +416,41 @@ private void initSSL(ChannelPipeline p, NettyServerRpcConnection conn, boolean s
       sslHandler.setWrapDataSize(
         conf.getInt(HBASE_SERVER_NETTY_TLS_WRAP_SIZE, DEFAULT_HBASE_SERVER_NETTY_TLS_WRAP_SIZE));
 
-      sslHandler.handshakeFuture().addListener(future -> {
-        try {
-          Certificate[] certificates = sslHandler.engine().getSession().getPeerCertificates();
-          if (certificates != null && certificates.length > 0) {
-            conn.clientCertificateChain = (X509Certificate[]) certificates;
-          } else if (sslHandler.engine().getNeedClientAuth()) {
-            LOG.error(
-              "Could not get peer certificate on TLS connection from {}, although one is required",
-              remoteAddress);
-          }
-        } catch (SSLPeerUnverifiedException e) {
-          if (sslHandler.engine().getNeedClientAuth()) {
-            LOG.error(
-              "Could not get peer certificate on TLS connection from {}, although one is required",
-              remoteAddress, e);
-          }
-        } catch (Exception e) {
-          LOG.error("Unexpected error getting peer certificate for TLS connection from {}",
-            remoteAddress, e);
-        }
-      });
+      sslHandler.handshakeFuture()
+        .addListener(future -> sslHandshakeCompleteHandler(conn, sslHandler, remoteAddress));
 
       p.addLast("ssl", sslHandler);
       LOG.debug("SSL handler added for channel: {}", p.channel());
     }
   }
 
+  static void sslHandshakeCompleteHandler(NettyServerRpcConnection conn, SslHandler sslHandler,
+    SocketAddress remoteAddress) {
+    try {
+      Certificate[] certificates = sslHandler.engine().getSession().getPeerCertificates();
+      if (certificates != null && certificates.length > 0) {
+        X509Certificate[] x509Certificates = new X509Certificate[certificates.length];
+        for (int i = 0; i < x509Certificates.length; i++) {
+          x509Certificates[i] = (X509Certificate) certificates[i];
+        }
+        conn.clientCertificateChain = x509Certificates;
+      } else if (sslHandler.engine().getNeedClientAuth()) {
+        LOG.debug(
+          "Could not get peer certificate on TLS connection from {}, although one is required",
+          remoteAddress);
+      }
+    } catch (SSLPeerUnverifiedException e) {
+      if (sslHandler.engine().getNeedClientAuth()) {
+        LOG.debug(
+          "Could not get peer certificate on TLS connection from {}, although one is required",
+          remoteAddress, e);
+      }
+    } catch (Exception e) {
+      LOG.debug("Unexpected error getting peer certificate for TLS connection from {}",
+        remoteAddress, e);
+    }
+  }
+
   SslContext getSslContext() throws X509Exception, IOException {
     SslContext result = sslContextForServer.get();
     if (result == null) {

hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestNettyRpcServer.java

@@ -17,11 +17,25 @@
  */
 package org.apache.hadoop.hbase.ipc;
 
+import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
+import java.io.ByteArrayInputStream;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
 import java.util.Arrays;
 import java.util.Collection;
+import javax.net.ssl.SSLEngine;
+import javax.net.ssl.SSLPeerUnverifiedException;
+import javax.net.ssl.SSLSession;
 import org.apache.hadoop.hbase.HBaseClassTestRule;
 import org.apache.hadoop.hbase.HBaseTestingUtil;
 import org.apache.hadoop.hbase.TableName;
@@ -47,6 +61,8 @@
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
 
+import org.apache.hbase.thirdparty.io.netty.handler.ssl.SslHandler;
+
 @Category({ RPCTests.class, MediumTests.class })
 @RunWith(Parameterized.class)
 public class TestNettyRpcServer {
@@ -122,4 +138,51 @@ protected void doTest(TableName tableName) throws Exception {
     }
   }
 
+  private static final String CERTIFICATE = "-----BEGIN CERTIFICATE-----\n"
+    + "MIIEITCCAwmgAwIBAgIUaLL8vLOhWLCLXVHEJqXJhfmsTB8wDQYJKoZIhvcNAQEL\n"
+    + "BQAwgawxCzAJBgNVBAYTAlVTMRYwFAYDVQQIDA1NYXNzYWNodXNldHRzMRIwEAYD\n"
+    + "VQQHDAlDYW1icmlkZ2UxGDAWBgNVBAoMD25ldHR5IHRlc3QgY2FzZTEYMBYGA1UE\n"
+    + "CwwPbmV0dHkgdGVzdCBjYXNlMRgwFgYDVQQDDA9uZXR0eSB0ZXN0IGNhc2UxIzAh\n"
+    + "BgkqhkiG9w0BCQEWFGNjb25uZWxsQGh1YnNwb3QuY29tMB4XDTI0MDEyMTE5MzMy\n"
+    + "MFoXDTI1MDEyMDE5MzMyMFowgawxCzAJBgNVBAYTAlVTMRYwFAYDVQQIDA1NYXNz\n"
+    + "YWNodXNldHRzMRIwEAYDVQQHDAlDYW1icmlkZ2UxGDAWBgNVBAoMD25ldHR5IHRl\n"
+    + "c3QgY2FzZTEYMBYGA1UECwwPbmV0dHkgdGVzdCBjYXNlMRgwFgYDVQQDDA9uZXR0\n"
+    + "eSB0ZXN0IGNhc2UxIzAhBgkqhkiG9w0BCQEWFGNjb25uZWxsQGh1YnNwb3QuY29t\n"
+    + "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy+qzEZpQMjVdLj0siUcG\n"
+    + "y8LIHOW4S+tgHIKFkF865qWq6FVGbROe2Z0f5W6yIamZkdxzptT0iv+8S5okNNeW\n"
+    + "2NbsN/HNJIRtWfxku1Jh1gBqSkAYIjXyq7+20hIaJTzzxqike9M/Lc14EGb33Ja/\n"
+    + "kDPRV3UtiM3Ntf3eALXKbrWptkbgQngCaTgtfg8IkMAEpP270wZ9fW0lDHv3NPPt\n"
+    + "Zt0QSJzWSqWfu+l4ayvcUQYyNJesx9YmTHSJu69lvT4QApoX8FEiHfNCJ28R50CS\n"
+    + "aIgOpCWUvkH7rqx0p9q393uJRS/S6RlLbU30xUN1fNrVmP/XAapfy+R0PSgiUi8o\n"
+    + "EQIDAQABozkwNzAWBgNVHRIEDzANggt3d3cuZm9vLmNvbTAdBgNVHQ4EFgQUl4FD\n"
+    + "Y8jJ/JHJR68YqPsGUjUJuwgwDQYJKoZIhvcNAQELBQADggEBADVzivYz2M0qsWUc\n"
+    + "jXjCHymwTIr+7ud10um53FbYEAfKWsIY8Pp35fKpFzUwc5wVdCnLU86K/YMKRzNB\n"
+    + "zL2Auow3PJFRvXecOv7dWxNlNneLDcwbVrdNRu6nQXmZUgyz0oUKuJbF+JGtI+7W\n"
+    + "kRw7yhBfki+UCSQWeDqvaWzgmA4Us0N8NFq3euAs4xFbMMPMQWrT9Z7DGchCeRiB\n"
+    + "dkQBvh88vbR3v2Saq14W4Wt5rj2++vXWGQSeAQL6nGbOwc3ohW6isNNV0eGQQTmS\n"
+    + "khS2d/JDZq2XL5RGexf3CA6YYzWiTr9YZHNjuobvLH7mVnA2c8n6Zty/UhfnuK1x\n" + "JbkleFk=\n"
+    + "-----END CERTIFICATE-----";
+
+  @Test
+  public void testHandshakeCompleteHandler()
+    throws SSLPeerUnverifiedException, CertificateException {
+    NettyServerRpcConnection conn = mock(NettyServerRpcConnection.class);
+    SslHandler sslHandler = mock(SslHandler.class);
+    SocketAddress remoteAddress = new InetSocketAddress("localhost", 5555);
+    SSLEngine engine = mock(SSLEngine.class);
+    SSLSession session = mock(SSLSession.class);
+    CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
+    X509Certificate x509Certificate = (X509Certificate) certificateFactory
+      .generateCertificate(new ByteArrayInputStream(CERTIFICATE.getBytes(StandardCharsets.UTF_8)));
+    Certificate[] certificates = new Certificate[] { x509Certificate };
+
+    when(sslHandler.engine()).thenReturn(engine);
+    when(engine.getSession()).thenReturn(session);
+    when(session.getPeerCertificates()).thenReturn(certificates);
+
+    NettyRpcServer.sslHandshakeCompleteHandler(conn, sslHandler, remoteAddress);
+
+    assertArrayEquals(certificates, conn.clientCertificateChain);
+  }
+
 }