diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/DelegatingSSLSocketFactory.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/DelegatingSSLSocketFactory.java
index c961364aa11..ff650d6c392 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/DelegatingSSLSocketFactory.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/DelegatingSSLSocketFactory.java
@@ -21,7 +21,6 @@ package org.apache.hadoop.security.ssl;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
-import java.net.SocketException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
@@ -31,11 +30,9 @@ import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
+import com.google.common.annotations.VisibleForTesting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import org.wildfly.openssl.OpenSSLProvider;
-import org.wildfly.openssl.SSL;
-
/**
* A {@link SSLSocketFactory} that can delegate to various SSL implementations.
@@ -60,8 +57,8 @@ import org.wildfly.openssl.SSL;
*
*
* In order to load OpenSSL, applications must ensure the wildfly-openssl
- * artifact is on the classpath. Currently, only ABFS and S3A provide
- * wildfly-openssl as a runtime dependency.
+ * artifact is on the classpath. Currently, only ABFS declares
+ * wildfly-openssl as an explicit dependency.
*/
public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
@@ -110,7 +107,16 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
}
/**
- * Singletone instance of the SSLSocketFactory.
+ * For testing only: reset the socket factory.
+ */
+ @VisibleForTesting
+ public static synchronized void resetDefaultFactory() {
+ LOG.info("Resetting default SSL Socket Factory");
+ instance = null;
+ }
+
+ /**
+ * Singleton instance of the SSLSocketFactory.
*
* SSLSocketFactory must be initialized with appropriate SSLChannelMode
* using initializeDefaultFactory method.
@@ -126,9 +132,7 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
throws IOException {
try {
initializeSSLContext(preferredChannelMode);
- } catch (NoSuchAlgorithmException e) {
- throw new IOException(e);
- } catch (KeyManagementException e) {
+ } catch (NoSuchAlgorithmException | KeyManagementException e) {
throw new IOException(e);
}
@@ -146,42 +150,23 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
}
private void initializeSSLContext(SSLChannelMode preferredChannelMode)
- throws NoSuchAlgorithmException, KeyManagementException {
+ throws NoSuchAlgorithmException, KeyManagementException, IOException {
+ LOG.debug("Initializing SSL Context to channel mode {}",
+ preferredChannelMode);
switch (preferredChannelMode) {
case Default:
- if (!openSSLProviderRegistered) {
- OpenSSLProvider.register();
- openSSLProviderRegistered = true;
- }
try {
- java.util.logging.Logger logger = java.util.logging.Logger.getLogger(
- SSL.class.getName());
- logger.setLevel(Level.WARNING);
- ctx = SSLContext.getInstance("openssl.TLS");
- ctx.init(null, null, null);
- // Strong reference needs to be kept to logger until initialization of
- // SSLContext finished (see HADOOP-16174):
- logger.setLevel(Level.INFO);
+ bindToOpenSSLProvider();
channelMode = SSLChannelMode.OpenSSL;
- } catch (NoSuchAlgorithmException e) {
- LOG.debug("Failed to load OpenSSL. Falling back to the JSSE default.");
+ } catch (LinkageError | NoSuchAlgorithmException | RuntimeException e) {
+ LOG.debug("Failed to load OpenSSL. Falling back to the JSSE default.",
+ e);
ctx = SSLContext.getDefault();
channelMode = SSLChannelMode.Default_JSSE;
}
break;
case OpenSSL:
- if (!openSSLProviderRegistered) {
- OpenSSLProvider.register();
- openSSLProviderRegistered = true;
- }
- java.util.logging.Logger logger = java.util.logging.Logger.getLogger(
- SSL.class.getName());
- logger.setLevel(Level.WARNING);
- ctx = SSLContext.getInstance("openssl.TLS");
- ctx.init(null, null, null);
- // Strong reference needs to be kept to logger until initialization of
- // SSLContext finished (see HADOOP-16174):
- logger.setLevel(Level.INFO);
+ bindToOpenSSLProvider();
channelMode = SSLChannelMode.OpenSSL;
break;
case Default_JSSE:
@@ -193,11 +178,38 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
channelMode = SSLChannelMode.Default_JSSE_with_GCM;
break;
default:
- throw new NoSuchAlgorithmException("Unknown channel mode: "
+ throw new IOException("Unknown channel mode: "
+ preferredChannelMode);
}
}
+ /**
+ * Bind to the OpenSSL provider via wildfly.
+ * This MUST be the only place where wildfly classes are referenced,
+ * so ensuring that any linkage problems only surface here where they may
+ * be caught by the initialization code.
+ */
+ private void bindToOpenSSLProvider()
+ throws NoSuchAlgorithmException, KeyManagementException {
+ if (!openSSLProviderRegistered) {
+ LOG.debug("Attempting to register OpenSSL provider");
+ org.wildfly.openssl.OpenSSLProvider.register();
+ openSSLProviderRegistered = true;
+ }
+ // Strong reference needs to be kept to logger until initialization of
+ // SSLContext finished (see HADOOP-16174):
+ java.util.logging.Logger logger = java.util.logging.Logger.getLogger(
+ "org.wildfly.openssl.SSL");
+ Level originalLevel = logger.getLevel();
+ try {
+ logger.setLevel(Level.WARNING);
+ ctx = SSLContext.getInstance("openssl.TLS");
+ ctx.init(null, null, null);
+ } finally {
+ logger.setLevel(originalLevel);
+ }
+ }
+
public String getProviderName() {
return providerName;
}
@@ -212,21 +224,26 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
return ciphers.clone();
}
+ /**
+ * Get the channel mode of this instance.
+ * @return a channel mode.
+ */
+ public SSLChannelMode getChannelMode() {
+ return channelMode;
+ }
+
public Socket createSocket() throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory.createSocket();
- configureSocket(ss);
- return ss;
+ return configureSocket(factory.createSocket());
}
@Override
public Socket createSocket(Socket s, String host, int port,
boolean autoClose) throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory.createSocket(s, host, port, autoClose);
- configureSocket(ss);
- return ss;
+ return configureSocket(
+ factory.createSocket(s, host, port, autoClose));
}
@Override
@@ -234,52 +251,41 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
InetAddress localAddress, int localPort)
throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory
- .createSocket(address, port, localAddress, localPort);
-
- configureSocket(ss);
- return ss;
+ return configureSocket(factory
+ .createSocket(address, port, localAddress, localPort));
}
@Override
public Socket createSocket(String host, int port, InetAddress localHost,
int localPort) throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory
- .createSocket(host, port, localHost, localPort);
- configureSocket(ss);
-
- return ss;
+ return configureSocket(factory
+ .createSocket(host, port, localHost, localPort));
}
@Override
public Socket createSocket(InetAddress host, int port) throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory.createSocket(host, port);
- configureSocket(ss);
-
- return ss;
+ return configureSocket(factory.createSocket(host, port));
}
@Override
public Socket createSocket(String host, int port) throws IOException {
SSLSocketFactory factory = ctx.getSocketFactory();
- SSLSocket ss = (SSLSocket) factory.createSocket(host, port);
- configureSocket(ss);
-
- return ss;
+ return configureSocket(factory.createSocket(host, port));
}
- private void configureSocket(SSLSocket ss) throws SocketException {
- ss.setEnabledCipherSuites(ciphers);
+ private Socket configureSocket(Socket socket) {
+ ((SSLSocket) socket).setEnabledCipherSuites(ciphers);
+ return socket;
}
private String[] alterCipherList(String[] defaultCiphers) {
- ArrayList preferredSuits = new ArrayList<>();
+ ArrayList preferredSuites = new ArrayList<>();
// Remove GCM mode based ciphers from the supported list.
for (int i = 0; i < defaultCiphers.length; i++) {
@@ -287,11 +293,11 @@ public final class DelegatingSSLSocketFactory extends SSLSocketFactory {
LOG.debug("Removed Cipher - {} from list of enabled SSLSocket ciphers",
defaultCiphers[i]);
} else {
- preferredSuits.add(defaultCiphers[i]);
+ preferredSuites.add(defaultCiphers[i]);
}
}
- ciphers = preferredSuits.toArray(new String[0]);
+ ciphers = preferredSuites.toArray(new String[0]);
return ciphers;
}
-}
\ No newline at end of file
+}
diff --git a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/NetworkBinding.java b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/NetworkBinding.java
index 8b34376a255..ca1b09e9bdc 100644
--- a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/NetworkBinding.java
+++ b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/NetworkBinding.java
@@ -66,26 +66,28 @@ public class NetworkBinding {
* @param awsConf the {@link ClientConfiguration} to set the
* SSLConnectionSocketFactory for.
* @throws IOException if there is an error while initializing the
- * {@link SSLSocketFactory}.
+ * {@link SSLSocketFactory} other than classloader problems.
*/
public static void bindSSLChannelMode(Configuration conf,
ClientConfiguration awsConf) throws IOException {
- try {
- // Validate that SSL_CHANNEL_MODE is set to a valid value.
- String channelModeString = conf.get(
- SSL_CHANNEL_MODE, DEFAULT_SSL_CHANNEL_MODE.name());
- DelegatingSSLSocketFactory.SSLChannelMode channelMode = null;
- for (DelegatingSSLSocketFactory.SSLChannelMode mode :
- DelegatingSSLSocketFactory.SSLChannelMode.values()) {
- if (mode.name().equalsIgnoreCase(channelModeString)) {
- channelMode = mode;
- }
- }
- if (channelMode == null) {
- throw new IllegalArgumentException(channelModeString +
- " is not a valid value for " + SSL_CHANNEL_MODE);
- }
+ // Validate that SSL_CHANNEL_MODE is set to a valid value.
+ String channelModeString = conf.getTrimmed(
+ SSL_CHANNEL_MODE, DEFAULT_SSL_CHANNEL_MODE.name());
+ DelegatingSSLSocketFactory.SSLChannelMode channelMode = null;
+ for (DelegatingSSLSocketFactory.SSLChannelMode mode :
+ DelegatingSSLSocketFactory.SSLChannelMode.values()) {
+ if (mode.name().equalsIgnoreCase(channelModeString)) {
+ channelMode = mode;
+ }
+ }
+ if (channelMode == null) {
+ throw new IllegalArgumentException(channelModeString +
+ " is not a valid value for " + SSL_CHANNEL_MODE);
+ }
+
+ DelegatingSSLSocketFactory.initializeDefaultFactory(channelMode);
+ try {
// Look for AWS_SOCKET_FACTORY_CLASSNAME on the classpath and instantiate
// an instance using the DelegatingSSLSocketFactory as the
// SSLSocketFactory.
@@ -94,7 +96,6 @@ public class NetworkBinding {
Constructor> factoryConstructor =
sslConnectionSocketFactory.getDeclaredConstructor(
SSLSocketFactory.class, HostnameVerifier.class);
- DelegatingSSLSocketFactory.initializeDefaultFactory(channelMode);
awsConf.getApacheHttpClientConfig().setSslSocketFactory(
(com.amazonaws.thirdparty.apache.http.conn.ssl.
SSLConnectionSocketFactory) factoryConstructor
@@ -103,7 +104,7 @@ public class NetworkBinding {
(HostnameVerifier) null));
} catch (ClassNotFoundException | NoSuchMethodException |
IllegalAccessException | InstantiationException |
- InvocationTargetException e) {
+ InvocationTargetException | LinkageError e) {
LOG.debug("Unable to create class {}, value of {} will be ignored",
AWS_SOCKET_FACTORY_CLASSNAME, SSL_CHANNEL_MODE, e);
}
diff --git a/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md b/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md
index 6ca60608106..68e768d38d1 100644
--- a/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md
+++ b/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md
@@ -539,7 +539,7 @@ in Java 9, so if `default_jsse` is specified and applications run on Java
includes GCM in the list of cipher suites on Java 8, so it is equivalent to
running with the vanilla JSSE.
-### OpenSSL Acceleration
+### OpenSSL Acceleration
**Experimental Feature**
@@ -552,8 +552,8 @@ significant performance benefit over the JSSE.
S3A uses the
[WildFly OpenSSL](https://github.com/wildfly-security/wildfly-openssl) library
to bind OpenSSL to the Java JSSE APIs. This library allows S3A to
-transparently read data using OpenSSL. The wildfly-openssl library is a
-runtime dependency of S3A and contains native libraries for binding the Java
+transparently read data using OpenSSL. The `wildfly-openssl` library is an
+optional runtime dependency of S3A and contains native libraries for binding the Java
JSSE to OpenSSL.
WildFly OpenSSL must load OpenSSL itself. This can be done using the system
@@ -596,19 +596,37 @@ exception and S3A initialization will fail.
Supported values for `fs.s3a.ssl.channel.mode`:
-| fs.s3a.ssl.channel.mode Value | Description |
+| `fs.s3a.ssl.channel.mode` Value | Description |
|-------------------------------|-------------|
-| default_jsse | Uses Java JSSE without GCM on Java 8 |
-| default_jsse_with_gcm | Uses Java JSSE |
-| default | Uses OpenSSL, falls back to default_jsse if OpenSSL cannot be loaded |
-| openssl | Uses OpenSSL, fails if OpenSSL cannot be loaded |
+| `default_jsse` | Uses Java JSSE without GCM on Java 8 |
+| `default_jsse_with_gcm` | Uses Java JSSE |
+| `default` | Uses OpenSSL, falls back to `default_jsse` if OpenSSL cannot be loaded |
+| `openssl` | Uses OpenSSL, fails if OpenSSL cannot be loaded |
The naming convention is setup in order to preserve backwards compatibility
-with HADOOP-15669.
+with the ABFS support of [HADOOP-15669](https://issues.apache.org/jira/browse/HADOOP-15669).
Other options may be added to `fs.s3a.ssl.channel.mode` in the future as
further SSL optimizations are made.
+### WildFly classpath requirements
+
+For OpenSSL acceleration to work, a compatible version of the
+wildfly JAR must be on the classpath. This is not explicitly declared
+in the dependencies of the published `hadoop-aws` module, as it is
+optional.
+
+If the wildfly JAR is not found, the network acceleration will fall back
+to the JVM, always.
+
+Note: there have been compatibility problems with wildfly JARs and openSSL
+releases in the past: version 1.0.4.Final is not compatible with openssl 1.1.1.
+An extra complication was older versions of the `azure-data-lake-store-sdk`
+JAR used in `hadoop-azure-datalake` contained an unshaded copy of the 1.0.4.Final
+classes, causing binding problems even when a later version was explicitly
+being placed on the classpath.
+
+
## Tuning FileSystem Initialization.
When an S3A Filesystem instance is created and initialized, the client
diff --git a/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/troubleshooting_s3a.md b/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/troubleshooting_s3a.md
index 47bc81e0ec4..c05641b2b4e 100644
--- a/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/troubleshooting_s3a.md
+++ b/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/troubleshooting_s3a.md
@@ -92,6 +92,19 @@ classpath, do not add any of the `aws-sdk-` JARs.
This happens if the `hadoop-aws` and `hadoop-common` JARs are out of sync.
You can't mix them around: they have to have exactly matching version numbers.
+### `java.lang.NoClassDefFoundError: org/wildfly/openssl/OpenSSLProvider`
+
+This happens when OpenSSL performance
+acceleration has been configured by setting `fs.s3a.ssl.channel.mode`
+to `openssl` but the wildfly JAR is not on the classpath.
+
+Fixes:
+* Add it to the classpath
+* Use a different channel mode, including `default`, which will
+revert to the JVM SSL implementation when the wildfly
+or native openssl libraries cannot be loaded.
+
+
## Authentication Failure
If Hadoop cannot authenticate with the S3 service endpoint,
diff --git a/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestWildflyAndOpenSSLBinding.java b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestWildflyAndOpenSSLBinding.java
new file mode 100644
index 00000000000..a2b013f468a
--- /dev/null
+++ b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestWildflyAndOpenSSLBinding.java
@@ -0,0 +1,152 @@
+/*
+ * 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.hadoop.fs.s3a;
+
+import java.io.IOException;
+
+import com.amazonaws.ClientConfiguration;
+import com.amazonaws.Protocol;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.security.ssl.DelegatingSSLSocketFactory;
+import org.apache.hadoop.test.AbstractHadoopTestBase;
+
+import static org.apache.hadoop.fs.s3a.Constants.SSL_CHANNEL_MODE;
+import static org.apache.hadoop.fs.s3a.impl.NetworkBinding.bindSSLChannelMode;
+import static org.apache.hadoop.security.ssl.DelegatingSSLSocketFactory.SSLChannelMode.Default;
+import static org.apache.hadoop.security.ssl.DelegatingSSLSocketFactory.SSLChannelMode.Default_JSSE;
+import static org.apache.hadoop.security.ssl.DelegatingSSLSocketFactory.SSLChannelMode.Default_JSSE_with_GCM;
+import static org.apache.hadoop.security.ssl.DelegatingSSLSocketFactory.SSLChannelMode.OpenSSL;
+import static org.apache.hadoop.test.LambdaTestUtils.intercept;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assumptions.assumeThat;
+
+/**
+ * Make sure that wildfly is not on this classpath and that we can still
+ * create connections in the default option, but that openssl fails.
+ * This test suite is designed to work whether or not wildfly JAR is on
+ * the classpath, and when openssl native libraries are/are not
+ * on the path.
+ * Some of the tests are skipped in a maven build because wildfly
+ * is always on the classpath -but they are retained as in-IDE
+ * runs may be different, and if wildfly is removed from
+ * the compile or test CP then different test cases will execute.
+ */
+public class TestWildflyAndOpenSSLBinding extends AbstractHadoopTestBase {
+
+ /** Was wildfly found. */
+ private boolean hasWildfly;
+
+ @Before
+ public void setup() throws Exception {
+ // determine whether or not wildfly is on the classpath
+ ClassLoader loader = this.getClass().getClassLoader();
+ try {
+ loader.loadClass("org.wildfly.openssl.OpenSSLProvider");
+ hasWildfly = true;
+ } catch (ClassNotFoundException e) {
+ hasWildfly = false;
+ }
+ }
+
+
+ @Test
+ public void testUnknownMode() throws Throwable {
+ DelegatingSSLSocketFactory.resetDefaultFactory();
+ Configuration conf = new Configuration(false);
+ conf.set(SSL_CHANNEL_MODE, "no-such-mode ");
+ intercept(IllegalArgumentException.class, () ->
+ bindSSLChannelMode(conf, new ClientConfiguration()));
+ }
+
+ @Test
+ public void testOpenSSLNoWildfly() throws Throwable {
+ assumeThat(hasWildfly).isFalse();
+ intercept(NoClassDefFoundError.class, "wildfly", () ->
+ bindSocketFactory(OpenSSL));
+ }
+
+ /**
+ * If there is no WF on the CP, then we always downgrade
+ * to default.
+ */
+ @Test
+ public void testDefaultDowngradesNoWildfly() throws Throwable {
+ assumeThat(hasWildfly).isFalse();
+ expectBound(Default, Default_JSSE);
+ }
+
+ /**
+ * Wildfly is on the CP; if openssl native is on the
+ * path then openssl will load, otherwise JSSE.
+ */
+ @Test
+ public void testWildflyOpenSSL() throws Throwable {
+ assumeThat(hasWildfly).isTrue();
+ assertThat(bindSocketFactory(Default))
+ .describedAs("Sockets from mode " + Default)
+ .isIn(OpenSSL, Default_JSSE);
+ }
+
+ @Test
+ public void testJSSE() throws Throwable {
+ expectBound(Default_JSSE, Default_JSSE);
+ }
+
+ @Test
+ public void testGCM() throws Throwable {
+ expectBound(Default_JSSE_with_GCM, Default_JSSE_with_GCM);
+ }
+
+ /**
+ * Bind to a socket mode and verify that the result matches
+ * that expected -which does not have to be the one requested.
+ * @param channelMode mode to use
+ * @param finalMode mode to test for
+ */
+ private void expectBound(
+ DelegatingSSLSocketFactory.SSLChannelMode channelMode,
+ DelegatingSSLSocketFactory.SSLChannelMode finalMode)
+ throws Throwable {
+ assertThat(bindSocketFactory(channelMode))
+ .describedAs("Channel mode of socket factory created with mode %s",
+ channelMode)
+ .isEqualTo(finalMode);
+ }
+
+ /**
+ * Bind the socket factory to a given channel mode.
+ * @param channelMode mode to use
+ * @return the actual channel mode.
+ */
+ private DelegatingSSLSocketFactory.SSLChannelMode bindSocketFactory(
+ final DelegatingSSLSocketFactory.SSLChannelMode channelMode)
+ throws IOException {
+ DelegatingSSLSocketFactory.resetDefaultFactory();
+ Configuration conf = new Configuration(false);
+ conf.set(SSL_CHANNEL_MODE, channelMode.name());
+ ClientConfiguration awsConf = new ClientConfiguration();
+ awsConf.setProtocol(Protocol.HTTPS);
+ bindSSLChannelMode(conf, awsConf);
+ return DelegatingSSLSocketFactory.getDefaultFactory().getChannelMode();
+ }
+
+}