Wait for installing security provider

app/src/amazon/java/eu/faircode/email/ApplicationSecure.java

@@ -1,4 +1,7 @@
 package eu.faircode.email;
 
 public class ApplicationSecure extends ApplicationEx {
+    public static boolean waitProviderInstalled() {
+        return true;
+    }
 }

app/src/fdroid/java/eu/faircode/email/ApplicationSecure.java

@@ -1,4 +1,7 @@
 package eu.faircode.email;
 
 public class ApplicationSecure extends ApplicationEx {
+    public static boolean waitProviderInstalled() {
+        return true;
+    }
 }

app/src/main/java/eu/faircode/email/EmailService.java

@@ -1212,12 +1212,14 @@ public class EmailService implements AutoCloseable {
 
         @Override
         public Socket createSocket(String host, int port) throws IOException {
+            ApplicationSecure.waitProviderInstalled();
             return configure(factory.createSocket(server, port));
         }
 
         @Override
         public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
             configureSocketOptions(s);
+            ApplicationSecure.waitProviderInstalled();
             return configure(factory.createSocket(s, server, port, autoClose));
         }
 
@@ -1229,6 +1231,7 @@ public class EmailService implements AutoCloseable {
 
         @Override
         public Socket createSocket(String host, int port, InetAddress clientAddress, int clientPort) throws IOException {
+            ApplicationSecure.waitProviderInstalled();
             return configure(factory.createSocket(server, port, clientAddress, clientPort));
         }
 

app/src/play/java/eu/faircode/email/ApplicationSecure.java

@@ -4,7 +4,12 @@ import android.content.Intent;
 
 import com.google.android.gms.security.ProviderInstaller;
 
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
 public class ApplicationSecure extends ApplicationEx implements ProviderInstaller.ProviderInstallListener {
+    private static final CountDownLatch lock = new CountDownLatch(1);
+
     @Override
     public void onCreate() {
         super.onCreate();
@@ -15,6 +20,7 @@ public class ApplicationSecure extends ApplicationEx implements ProviderInstalle
     @Override
     public void onProviderInstalled() {
         Log.i("Security provider installed");
+        lock.countDown();
     }
 
     @Override
@@ -22,5 +28,18 @@ public class ApplicationSecure extends ApplicationEx implements ProviderInstalle
         Log.i("Security provider install failed" +
                 " errorCode=" + errorCode +
                 " recoveryIntent=" + recoveryIntent);
+        lock.countDown();
+    }
+
+    public static boolean waitProviderInstalled() {
+        Log.i("Security provider wait");
+        try {
+            boolean succeeded = lock.await(500L, TimeUnit.MILLISECONDS);
+            Log.i("Security provider wait succeeded=" + succeeded);
+            return succeeded;
+        } catch (InterruptedException ex) {
+            Log.e(ex);
+            return false;
+        }
     }
 }