testing thread-pausing in verifyText()

res/values/strings.xml

@@ -42,6 +42,7 @@
     <string name="title_keyNotFound">Key Not Found</string>
     <string name="title_help">Getting Started</string>
     <string name="title_keyServerQuery">Query Key Server</string>
+    <string name="title_unknownSignatureKey">Unknown Signature Key</string>
 
     <!-- section_lowerCase: capitalized words, no punctuation -->
     <string name="section_userIds">User IDs</string>
@@ -211,6 +212,7 @@
     <string name="unknownSignatureKeyTouchToLookUp">Unknown signature, touch to look up key.</string>
     <string name="keyEditingIsBeta">Key editing is still kind of beta.</string>
     <string name="badKeysEncountered">%s bad secret key(s) ignored. Perhaps you exported with the option\n --export-secret-subkeys\nMake sure you export with\n --export-secret-keys\ninstead.</string>
+    <string name="lookupUnknownKey">Unknown key %s, do you want to try finding it on a keyserver?</string>
 
     <!-- error_lowerCase: phrases, no punctuation, all lowercase,
          they will be put after "errorMessage", e.g. "Error: file not found" -->

src/org/thialfihar/android/apg/Apg.java

@@ -100,7 +100,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
-import android.os.Handler;
+import android.os.Message;
 import android.view.ViewGroup;
 
 public class Apg {
@@ -1717,10 +1717,9 @@ public class Apg {
         return returnData;
     }
 
-    public static Bundle verifyText(Context context,
+    public static Bundle verifyText(BaseActivity context,
                                     InputData data, OutputStream outStream,
-                                    ProgressDialogUpdater progress,
+                                    ProgressDialogUpdater progress)
-                                    PausableThread thread, Handler handler)
             throws IOException, GeneralException, PGPException, SignatureException {
         Bundle returnData = new Bundle();
 
@@ -1768,6 +1767,19 @@ public class Apg {
             if (signatureKeyId == 0) {
                 signatureKeyId = signature.getKeyID();
             }
+            if (signatureKey == null) {
+                Bundle pauseData = new Bundle();
+                pauseData.putInt(Constants.extras.status, Id.message.unknown_signature_key);
+                pauseData.putLong(Constants.extras.key_id, signatureKeyId);
+                Message msg = new Message();
+                msg.setData(pauseData);
+                context.sendMessage(msg);
+                // pause here
+                context.getRunningThread().pause();
+                // see whether the key was found in the meantime
+                signatureKey = getPublicKey(signature.getKeyID());
+            }
+
             if (signatureKey == null) {
                 signature = null;
             } else {

src/org/thialfihar/android/apg/BaseActivity.java

@@ -414,10 +414,6 @@ public class BaseActivity extends Activity
         return mRunningThread;
     }
 
-    public Handler getHandler() {
-        return mHandler;
-    }
-
     public void startThread() {
         mRunningThread = new PausableThread(this);
         mRunningThread.start();

src/org/thialfihar/android/apg/Constants.java

@@ -46,5 +46,6 @@ public final class Constants {
         public static final String progress_max = "max";
         public static final String status = "status";
         public static final String message = "message";
+        public static final String key_id = "keyId";
     }
 }

src/org/thialfihar/android/apg/DecryptActivity.java

@@ -31,8 +31,10 @@ import org.bouncycastle2.openpgp.PGPException;
 import org.bouncycastle2.openpgp.PGPPublicKeyRing;
 import org.thialfihar.android.apg.provider.DataProvider;
 
+import android.app.AlertDialog;
 import android.app.Dialog;
 import android.content.ActivityNotFoundException;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
@@ -92,6 +94,8 @@ public class DecryptActivity extends BaseActivity {
     private DataSource mDataSource = null;
     private DataDestination mDataDestination = null;
 
+    private long mUnknownSignatureKeyId = 0;
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -509,7 +513,7 @@ public class DecryptActivity extends BaseActivity {
             OutputStream out = mDataDestination.getOutputStream(this);
 
             if (mSignedOnly) {
-                data = Apg.verifyText(this, in, out, this, getRunningThread(), getHandler());
+                data = Apg.verifyText(this, in, out, this);
             } else {
                 data = Apg.decrypt(this, in, out, Apg.getCachedPassPhrase(getSecretKeyId()),
                                    this, mAssumeSymmetricEncryption);
@@ -549,6 +553,7 @@ public class DecryptActivity extends BaseActivity {
         sendMessage(msg);
     }
 
+    @Override
     public void handlerCallback(Message msg) {
         Bundle data = msg.getData();
         if (data == null) {
@@ -556,7 +561,9 @@ public class DecryptActivity extends BaseActivity {
         }
 
         if (data.getInt(Constants.extras.status) == Id.message.unknown_signature_key) {
-
+            mUnknownSignatureKeyId = data.getLong(Constants.extras.key_id);
+            showDialog(Id.dialog.lookup_unknown_key);
+            return;
         }
 
         super.handlerCallback(msg);
@@ -673,6 +680,14 @@ public class DecryptActivity extends BaseActivity {
                 return;
             }
 
+            case Id.request.look_up_key_id: {
+                PausableThread thread = getRunningThread();
+                if (thread != null && thread.isPaused()) {
+                    thread.unpause();
+                }
+                return;
+            }
+
             default: {
                 break;
             }
@@ -707,6 +722,39 @@ public class DecryptActivity extends BaseActivity {
                                         Id.request.output_filename);
             }
 
+            case Id.dialog.lookup_unknown_key: {
+                AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+                alert.setIcon(android.R.drawable.ic_dialog_alert);
+                alert.setTitle(R.string.title_unknownSignatureKey);
+                alert.setMessage(getString(R.string.lookupUnknownKey, Apg.getFingerPrint(mUnknownSignatureKeyId)));
+
+                alert.setPositiveButton(android.R.string.ok,
+                                        new DialogInterface.OnClickListener() {
+                                            public void onClick(DialogInterface dialog, int id) {
+                                                removeDialog(Id.dialog.lookup_unknown_key);
+                                                Intent intent = new Intent(DecryptActivity.this,
+                                                                           KeyServerQueryActivity.class);
+                                                intent.setAction(Apg.Intent.LOOK_UP_KEY_ID);
+                                                intent.putExtra(Apg.EXTRA_KEY_ID, mUnknownSignatureKeyId);
+                                                startActivityForResult(intent, Id.request.look_up_key_id);
+                                            }
+                                        });
+                alert.setNegativeButton(android.R.string.cancel,
+                                        new DialogInterface.OnClickListener() {
+                                            public void onClick(DialogInterface dialog, int id) {
+                                                removeDialog(Id.dialog.lookup_unknown_key);
+                                                PausableThread thread = getRunningThread();
+                                                if (thread != null && thread.isPaused()) {
+                                                    thread.unpause();
+                                                }
+                                            }
+                                        });
+                alert.setCancelable(true);
+
+                return alert.create();
+            }
+
             default: {
                 break;
             }

src/org/thialfihar/android/apg/Id.java

@@ -85,6 +85,7 @@ public final class Id {
         public static final int deleting = 0x21070013;
         public static final int help = 0x21070014;
         public static final int querying = 0x21070015;
+        public static final int lookup_unknown_key = 0x21070016;
     }
 
     public static final class task {