Yubikey: use PIN

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/Preferences.java

@@ -20,6 +20,7 @@ package org.sufficientlysecure.keychain.helper;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.os.Build;
 
 import org.spongycastle.bcpg.CompressionAlgorithmTags;
 import org.spongycastle.bcpg.HashAlgorithmTags;
@@ -51,7 +52,12 @@ public class Preferences {
     }
 
     private Preferences(Context context) {
-        mSharedPreferences = context.getSharedPreferences("APG.main", Context.MODE_PRIVATE);
+        // multi-process preferences
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            mSharedPreferences = context.getSharedPreferences("APG.main", Context.MODE_MULTI_PROCESS);
+        } else {
+            mSharedPreferences = context.getSharedPreferences("APG.main", Context.MODE_PRIVATE);
+        }
     }
 
     public String getLanguage() {

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseCacheService.java

@@ -215,8 +215,10 @@ public class PassphraseCacheService extends Service {
         switch (keyType) {
             case DIVERT_TO_CARD:
                 if (Preferences.getPreferences(this).useDefaultYubikeyPin()) {
+                    Log.d(Constants.TAG, "PassphraseCacheService: Using default Yubikey PIN: 123456");
                     return "123456"; // default Yubikey PIN, see http://www.yubico.com/2012/12/yubikey-neo-openpgp/
                 } else {
+                    Log.d(Constants.TAG, "PassphraseCacheService: NOT using default Yubikey PIN");
                     break;
                 }
             case PASSPHRASE_EMPTY:

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java

@@ -160,7 +160,7 @@ public class PassphraseDialogFragment extends DialogFragment implements OnEditor
                         message = getString(R.string.passphrase_for, userId);
                         break;
                     case DIVERT_TO_CARD:
-                        message = getString(R.string.yubikey_pin);
+                        message = getString(R.string.yubikey_pin, userId);
                         break;
                     default:
                         message = "This should not happen!";