Fixed problem with android versions <= 4.4 (#1957)

Author: alexChernyatiev

android/app/src/main/java/com/microsoft/codepush/react/CodePushUpdateManager.java

@@ -1,5 +1,7 @@
 package com.microsoft.codepush.react;
 
+import android.os.Build;
+
 import org.json.JSONObject;
 
 import java.io.BufferedInputStream;
@@ -12,6 +14,8 @@
 import java.net.URL;
 import java.nio.ByteBuffer;
 
+import javax.net.ssl.HttpsURLConnection;
+
 public class CodePushUpdateManager {
 
     private String mDocumentsDirectory;
@@ -163,6 +167,16 @@ public void downloadPackage(JSONObject updatePackage, String expectedBundleFileN
         try {
             URL downloadUrl = new URL(downloadUrlString);
             connection = (HttpURLConnection) (downloadUrl.openConnection());
+
+            if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP &&
+                downloadUrl.toString().startsWith("https")) {
+                try {
+                    ((HttpsURLConnection)connection).setSSLSocketFactory(new TLSSocketFactory());
+                } catch (Exception e) {
+                    throw new CodePushUnknownException("Error set SSLSocketFactory. ", e);
+                }
+            }
+
             connection.setRequestProperty("Accept-Encoding", "identity");
             bin = new BufferedInputStream(connection.getInputStream());
 

android/app/src/main/java/com/microsoft/codepush/react/TLSSocketFactory.java

@@ -0,0 +1,72 @@
+package com.microsoft.codepush.react;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+
+public class TLSSocketFactory extends SSLSocketFactory {
+
+    private SSLSocketFactory delegate;
+
+    public TLSSocketFactory() throws KeyManagementException, NoSuchAlgorithmException {
+        SSLContext context = SSLContext.getInstance("TLS");
+        context.init(null, null, null);
+        delegate = context.getSocketFactory();
+    }
+
+    @Override
+    public String[] getDefaultCipherSuites() {
+        return delegate.getDefaultCipherSuites();
+    }
+
+    @Override
+    public String[] getSupportedCipherSuites() {
+        return delegate.getSupportedCipherSuites();
+    }
+
+    @Override
+    public Socket createSocket() throws IOException {
+        return enableTLSOnSocket(delegate.createSocket());
+    }
+
+    @Override
+    public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
+        return enableTLSOnSocket(delegate.createSocket(s, host, port, autoClose));
+    }
+
+    @Override
+    public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
+        return enableTLSOnSocket(delegate.createSocket(host, port));
+    }
+
+    @Override
+    public Socket createSocket(String host, int port, InetAddress localHost, int localPort)
+            throws IOException, UnknownHostException {
+        return enableTLSOnSocket(delegate.createSocket(host, port, localHost, localPort));
+    }
+
+    @Override
+    public Socket createSocket(InetAddress host, int port) throws IOException {
+        return enableTLSOnSocket(delegate.createSocket(host, port));
+    }
+
+    @Override
+    public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort)
+            throws IOException {
+        return enableTLSOnSocket(delegate.createSocket(address, port, localAddress, localPort));
+    }
+
+    private Socket enableTLSOnSocket(Socket socket) {
+        if (socket != null && (socket instanceof SSLSocket)) {
+            ((SSLSocket) socket).setEnabledProtocols(new String[] { "TLSv1.1", "TLSv1.2" });
+        }
+        return socket;
+    }
+}