Introduce ProviderHelper.NotFoundException, remove dead code

12 files changed, 152 insertions, 128 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java
index e5f901c7f..c42446c9e 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java
@@ -50,13 +50,17 @@ public class ExportHelper {
     }
 
     public void deleteKey(Uri dataUri, Handler deleteHandler) {
-        // Create a new Messenger for the communication back
-        Messenger messenger = new Messenger(deleteHandler);
-        long masterKeyId = ProviderHelper.getMasterKeyId(mActivity, dataUri);
-
-        DeleteKeyDialogFragment deleteKeyDialog = DeleteKeyDialogFragment.newInstance(messenger,
-                new long[]{ masterKeyId });
-        deleteKeyDialog.show(mActivity.getSupportFragmentManager(), "deleteKeyDialog");
+        try {
+            long masterKeyId = ProviderHelper.getMasterKeyId(mActivity, dataUri);
+
+            // Create a new Messenger for the communication back
+            Messenger messenger = new Messenger(deleteHandler);
+            DeleteKeyDialogFragment deleteKeyDialog = DeleteKeyDialogFragment.newInstance(messenger,
+                    new long[]{ masterKeyId });
+            deleteKeyDialog.show(mActivity.getSupportFragmentManager(), "deleteKeyDialog");
+        } catch (ProviderHelper.NotFoundException e) {
+            Log.e(Constants.TAG, "key not found!", e);
+        }
     }
 
     /**
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
index 1c1322e89..3e04aff47 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
@@ -54,6 +54,7 @@ import org.spongycastle.openpgp.operator.jcajce.JcePublicKeyDataDecryptorFactory
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.service.PassphraseCacheService;
@@ -235,10 +236,19 @@ public class PgpDecryptVerify {
                 updateProgress(R.string.progress_finding_key, currentProgress, 100);
 
                 PGPPublicKeyEncryptedData encData = (PGPPublicKeyEncryptedData) obj;
-                long masterKeyId = ProviderHelper.getMasterKeyId(mContext,
-                        KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(encData.getKeyID()))
-                );
+
+                // get master key id for this encryption key id
+                long masterKeyId = 0;
+                try {
+                    masterKeyId = ProviderHelper.getMasterKeyId(mContext,
+                            KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(encData.getKeyID()))
+                    );
+                } catch (ProviderHelper.NotFoundException e) {
+                    Log.e(Constants.TAG, "key not found!", e);
+                }
+                // get actual keyring object based on master key id
                 PGPSecretKeyRing secretKeyRing = ProviderHelper.getPGPSecretKeyRing(mContext, masterKeyId);
+
                 if (secretKeyRing == null) {
                     throw new PgpGeneralException(mContext.getString(R.string.error_no_secret_key_found));
                 }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpHelper.java
index b329a6fc9..2b518c7e6 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpHelper.java
@@ -24,17 +24,12 @@ import android.content.pm.PackageManager.NameNotFoundException;
 
 import org.spongycastle.openpgp.PGPEncryptedDataList;
 import org.spongycastle.openpgp.PGPObjectFactory;
-import org.spongycastle.openpgp.PGPPublicKeyEncryptedData;
 import org.spongycastle.openpgp.PGPPublicKeyRing;
-import org.spongycastle.openpgp.PGPSecretKey;
 import org.spongycastle.openpgp.PGPSecretKeyRing;
 import org.spongycastle.openpgp.PGPUtil;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.Id;
 import org.sufficientlysecure.keychain.R;
-import org.sufficientlysecure.keychain.pgp.exception.NoAsymmetricEncryptionException;
-import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
-import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.ProgressDialogUpdater;
 
@@ -43,7 +38,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.RandomAccessFile;
 import java.security.SecureRandom;
-import java.util.Iterator;
 import java.util.regex.Pattern;
 
 public class PgpHelper {
@@ -76,52 +70,6 @@ public class PgpHelper {
         return "OpenPGP Keychain v" + getVersion(context);
     }
 
-    public static long getDecryptionKeyId(Context context, InputStream inputStream)
-            throws PgpGeneralException, NoAsymmetricEncryptionException, IOException {
-        InputStream in = PGPUtil.getDecoderStream(inputStream);
-        PGPObjectFactory pgpF = new PGPObjectFactory(in);
-        PGPEncryptedDataList enc;
-        Object o = pgpF.nextObject();
-
-        // the first object might be a PGP marker packet.
-        if (o instanceof PGPEncryptedDataList) {
-            enc = (PGPEncryptedDataList) o;
-        } else {
-            enc = (PGPEncryptedDataList) pgpF.nextObject();
-        }
-
-        if (enc == null) {
-            throw new PgpGeneralException(context.getString(R.string.error_invalid_data));
-        }
-
-        // TODO: currently we always only look at the first known key
-        // find the secret key
-        PGPSecretKey secretKey = null;
-        Iterator<?> it = enc.getEncryptedDataObjects();
-        boolean gotAsymmetricEncryption = false;
-        while (it.hasNext()) {
-            Object obj = it.next();
-            if (obj instanceof PGPPublicKeyEncryptedData) {
-                gotAsymmetricEncryption = true;
-                PGPPublicKeyEncryptedData pbe = (PGPPublicKeyEncryptedData) obj;
-                secretKey = ProviderHelper.getPGPSecretKeyRing(context, pbe.getKeyID()).getSecretKey();
-                if (secretKey != null) {
-                    break;
-                }
-            }
-        }
-
-        if (!gotAsymmetricEncryption) {
-            throw new NoAsymmetricEncryptionException();
-        }
-
-        if (secretKey == null) {
-            return Id.key.none;
-        }
-
-        return secretKey.getKeyID();
-    }
-
     public static int getStreamContent(Context context, InputStream inStream) throws IOException {
         InputStream in = PGPUtil.getDecoderStream(inStream);
         PGPObjectFactory pgpF = new PGPObjectFactory(in);
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java
index f39368e19..6b6be49f1 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java
@@ -64,6 +64,15 @@ import java.util.Set;
 
 public class ProviderHelper {
 
+    public static class NotFoundException extends Exception {
+        public NotFoundException() {
+        }
+
+        public NotFoundException(String name) {
+            super(name);
+        }
+    }
+
     // If we ever switch to api level 11, we can ditch this whole mess!
     public static final int FIELD_TYPE_NULL = 1;
     // this is called integer to stay coherent with the constants in Cursor (api level 11)
@@ -113,7 +122,7 @@ public class ProviderHelper {
      * Find the master key id related to a given query. The id will either be extracted from the
      * query, which should work for all specific /key_rings/ queries, or will be queried if it can't.
      */
-    public static long getMasterKeyId(Context context, Uri queryUri) {
+    public static long getMasterKeyId(Context context, Uri queryUri) throws NotFoundException {
         // try extracting from the uri first
         String firstSegment = queryUri.getPathSegments().get(1);
         if(!firstSegment.equals("find")) try {
@@ -123,10 +132,11 @@ public class ProviderHelper {
             Log.d(Constants.TAG, "Couldn't get masterKeyId from URI, querying...");
         }
         Object data = getGenericData(context, queryUri, KeyRings.MASTER_KEY_ID, FIELD_TYPE_INTEGER);
-        if(data != null)
+        if(data != null) {
             return (Long) data;
-        // TODO better error handling?
-        return 0L;
+        } else {
+            throw new NotFoundException();
+        }
     }
 
     public static Map<Long, PGPKeyRing> getPGPKeyRings(Context context, Uri queryUri) {
@@ -158,17 +168,23 @@ public class ProviderHelper {
 
     public static PGPPublicKeyRing getPGPPublicKeyRingWithKeyId(Context context, long keyId) {
         Uri uri = KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId));
-        long masterKeyId = getMasterKeyId(context, uri);
-        if(masterKeyId != 0)
+        long masterKeyId;
+        try {
+            masterKeyId = getMasterKeyId(context, uri);
             return getPGPPublicKeyRing(context, masterKeyId);
-        return null;
+        } catch (NotFoundException e) {
+            return null;
+        }
     }
     public static PGPSecretKeyRing getPGPSecretKeyRingWithKeyId(Context context, long keyId) {
         Uri uri = KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId));
-        long masterKeyId = getMasterKeyId(context, uri);
-        if(masterKeyId != 0)
+        long masterKeyId;
+        try {
+            masterKeyId = getMasterKeyId(context, uri);
             return getPGPSecretKeyRing(context, masterKeyId);
-        return null;
+        } catch (NotFoundException notFound) {
+            return null;
+        }
     }
 
     /**
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/AccountSettingsFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/AccountSettingsFragment.java
index 0a3ec3c3b..321d2a83f 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/AccountSettingsFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/AccountSettingsFragment.java
@@ -32,6 +32,7 @@ import android.widget.TextView;
 
 import com.beardedhen.androidbootstrap.BootstrapButton;
 
+import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
@@ -40,6 +41,7 @@ import org.sufficientlysecure.keychain.ui.EditKeyActivity;
 import org.sufficientlysecure.keychain.ui.SelectSecretKeyLayoutFragment;
 import org.sufficientlysecure.keychain.ui.adapter.KeyValueSpinnerAdapter;
 import org.sufficientlysecure.keychain.util.AlgorithmNames;
+import org.sufficientlysecure.keychain.util.Log;
 
 public class AccountSettingsFragment extends Fragment implements
         SelectSecretKeyLayoutFragment.SelectSecretKeyCallback {
@@ -177,8 +179,12 @@ public class AccountSettingsFragment extends Fragment implements
             case REQUEST_CODE_CREATE_KEY: {
                 if (resultCode == Activity.RESULT_OK) {
                     // select newly created key
-                    long masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), data.getData());
-                    mSelectKeyFragment.selectKey(masterKeyId);
+                    try {
+                        long masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), data.getData());
+                        mSelectKeyFragment.selectKey(masterKeyId);
+                    } catch (ProviderHelper.NotFoundException e) {
+                        Log.e(Constants.TAG, "key not found!", e);
+                    }
                 }
                 break;
             }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseCacheService.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseCacheService.java
index 962b304c7..8d2afe3b7 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseCacheService.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseCacheService.java
@@ -171,11 +171,12 @@ public class PassphraseCacheService extends Service {
         // try to get master key id which is used as an identifier for cached passphrases
         long masterKeyId = keyId;
         if (masterKeyId != Id.key.symmetric) {
-            masterKeyId = ProviderHelper.getMasterKeyId(this,
-                    KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId)));
-            // Failure
-            if(masterKeyId == 0)
+            try {
+                masterKeyId = ProviderHelper.getMasterKeyId(this,
+                        KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId)));
+            } catch (ProviderHelper.NotFoundException e) {
                 return null;
+            }
         }
         Log.d(TAG, "getCachedPassphraseImpl() for masterKeyId " + masterKeyId);
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyActivity.java
index 3d910e45e..cfb7c56c2 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyActivity.java
@@ -286,9 +286,13 @@ public class EditKeyActivity extends ActionBarActivity implements EditorListener
         } else {
             Log.d(Constants.TAG, "uri: " + mDataUri);
 
-            // get master key id using row id
-            long masterKeyId = ProviderHelper.getMasterKeyId(this, mDataUri);
-            finallyEdit(masterKeyId);
+            try {
+                // get master key id using row id
+                long masterKeyId = ProviderHelper.getMasterKeyId(this, mDataUri);
+                finallyEdit(masterKeyId);
+            } catch (ProviderHelper.NotFoundException e) {
+                Log.e(Constants.TAG, "key not found!", e);
+            }
         }
     }
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
index 8400cf397..7fcb9a552 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
@@ -34,11 +34,14 @@ import org.spongycastle.openpgp.PGPPublicKey;
 import org.spongycastle.openpgp.PGPPublicKeyRing;
 import org.spongycastle.openpgp.PGPSecretKey;
 import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.Id;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.util.Log;
 
 import java.util.HashMap;
 import java.util.Vector;
@@ -160,11 +163,15 @@ public class EncryptAsymmetricFragment extends Fragment {
         if (preselectedEncryptionKeyIds != null) {
             Vector<Long> goodIds = new Vector<Long>();
             for (int i = 0; i < preselectedEncryptionKeyIds.length; ++i) {
-                long id = ProviderHelper.getMasterKeyId(getActivity(),
-                        KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(preselectedEncryptionKeyIds[i]))
-                );
                 // TODO check for available encrypt keys... is this even relevant?
-                goodIds.add(id);
+                try {
+                    long id = ProviderHelper.getMasterKeyId(getActivity(),
+                            KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(preselectedEncryptionKeyIds[i]))
+                    );
+                    goodIds.add(id);
+                } catch (ProviderHelper.NotFoundException e) {
+                    Log.e(Constants.TAG, "key not found!", e);
+                }
             }
             if (goodIds.size() > 0) {
                 long[] keyIds = new long[goodIds.size()];
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
index 294fadab2..92e171130 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
@@ -234,17 +234,20 @@ public class ViewCertActivity extends ActionBarActivity
                 } else {
                     viewIntent = new Intent(this, ViewKeyActivityJB.class);
                 }
-                //
-                long signerMasterKeyId = ProviderHelper.getMasterKeyId(this,
-                        KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(mSignerKeyId))
-                );
-                // TODO notify user of this, maybe offer download?
-                if (mSignerKeyId == 0L)
-                    return true;
-                viewIntent.setData(KeyRings.buildGenericKeyRingUri(
-                        Long.toString(signerMasterKeyId))
-                );
-                startActivity(viewIntent);
+
+                try {
+                    long signerMasterKeyId = ProviderHelper.getMasterKeyId(this,
+                            KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(mSignerKeyId))
+                    );
+                    viewIntent.setData(KeyRings.buildGenericKeyRingUri(
+                            Long.toString(signerMasterKeyId))
+                    );
+                    startActivity(viewIntent);
+                } catch (ProviderHelper.NotFoundException e) {
+                    // TODO notify user of this, maybe offer download?
+                    Log.e(Constants.TAG, "key not found!", e);
+                }
+
                 return true;
         }
         return super.onOptionsItemSelected(item);
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
index cce34139c..e01f3397b 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
@@ -43,6 +43,7 @@ import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.ui.adapter.TabsAdapter;
 import org.sufficientlysecure.keychain.ui.dialog.ShareNfcDialogFragment;
 import org.sufficientlysecure.keychain.ui.dialog.ShareQrCodeDialogFragment;
+import org.sufficientlysecure.keychain.util.Log;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -184,7 +185,7 @@ public class ViewKeyActivity extends ActionBarActivity {
     }
 
     private void shareKey(Uri dataUri, boolean fingerprintOnly) {
-        String content;
+        String content = null;
         if (fingerprintOnly) {
             byte[] data = (byte[]) ProviderHelper.getGenericData(
                     this, KeychainContract.KeyRings.buildUnifiedKeyRingUri(dataUri),
@@ -199,27 +200,36 @@ public class ViewKeyActivity extends ActionBarActivity {
             }
         } else {
             // get public keyring as ascii armored string
-            long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
-            ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
-                    this, new long[]{masterKeyId});
+            try {
+                long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
 
-            content = keyringArmored.get(0);
+                ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
+                        this, new long[]{masterKeyId});
 
-            // Android will fail with android.os.TransactionTooLargeException if key is too big
-            // see http://www.lonestarprod.com/?p=34
-            if (content.length() >= 86389) {
-                Toast.makeText(getApplicationContext(), R.string.key_too_big_for_sharing,
-                        Toast.LENGTH_LONG).show();
-                return;
+                content = keyringArmored.get(0);
+
+                // Android will fail with android.os.TransactionTooLargeException if key is too big
+                // see http://www.lonestarprod.com/?p=34
+                if (content.length() >= 86389) {
+                    Toast.makeText(getApplicationContext(), R.string.key_too_big_for_sharing,
+                            Toast.LENGTH_LONG).show();
+                    return;
+                }
+            } catch (ProviderHelper.NotFoundException e) {
+                Log.e(Constants.TAG, "key not found!", e);
             }
         }
 
-        // let user choose application
-        Intent sendIntent = new Intent(Intent.ACTION_SEND);
-        sendIntent.putExtra(Intent.EXTRA_TEXT, content);
-        sendIntent.setType("text/plain");
-        startActivity(Intent.createChooser(sendIntent,
-                getResources().getText(R.string.action_share_key_with)));
+        if (content != null) {
+            // let user choose application
+            Intent sendIntent = new Intent(Intent.ACTION_SEND);
+            sendIntent.putExtra(Intent.EXTRA_TEXT, content);
+            sendIntent.setType("text/plain");
+            startActivity(Intent.createChooser(sendIntent,
+                    getResources().getText(R.string.action_share_key_with)));
+        } else {
+            Log.e(Constants.TAG, "content is null!");
+        }
     }
 
     private void shareKeyQrCode(Uri dataUri, boolean fingerprintOnly) {
@@ -230,13 +240,18 @@ public class ViewKeyActivity extends ActionBarActivity {
 
     private void copyToClipboard(Uri dataUri) {
         // get public keyring as ascii armored string
-        long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
-        ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
-                this, new long[]{masterKeyId});
+        try {
+            long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
 
-        ClipboardReflection.copyToClipboard(this, keyringArmored.get(0));
-        Toast.makeText(getApplicationContext(), R.string.key_copied_to_clipboard, Toast.LENGTH_LONG)
-                .show();
+            ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
+                    this, new long[]{masterKeyId});
+
+            ClipboardReflection.copyToClipboard(this, keyringArmored.get(0));
+            Toast.makeText(getApplicationContext(), R.string.key_copied_to_clipboard, Toast.LENGTH_LONG)
+                    .show();
+        } catch (ProviderHelper.NotFoundException e) {
+            Log.e(Constants.TAG, "key not found!", e);
+        }
     }
 
     private void shareNfc() {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java
index 6e96a338a..3d4002696 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java
@@ -328,14 +328,18 @@ public class ViewKeyMainFragment extends Fragment implements
 
     private void encryptToContact(Uri dataUri) {
         // TODO preselect from uri? should be feasible without trivial query
-        long keyId = ProviderHelper.getMasterKeyId(getActivity(), dataUri);
-
-        long[] encryptionKeyIds = new long[]{ keyId };
-        Intent intent = new Intent(getActivity(), EncryptActivity.class);
-        intent.setAction(EncryptActivity.ACTION_ENCRYPT);
-        intent.putExtra(EncryptActivity.EXTRA_ENCRYPTION_KEY_IDS, encryptionKeyIds);
-        // used instead of startActivity set actionbar based on callingPackage
-        startActivityForResult(intent, 0);
+        try {
+            long keyId = ProviderHelper.getMasterKeyId(getActivity(), dataUri);
+
+            long[] encryptionKeyIds = new long[]{ keyId };
+            Intent intent = new Intent(getActivity(), EncryptActivity.class);
+            intent.setAction(EncryptActivity.ACTION_ENCRYPT);
+            intent.putExtra(EncryptActivity.EXTRA_ENCRYPTION_KEY_IDS, encryptionKeyIds);
+            // used instead of startActivity set actionbar based on callingPackage
+            startActivityForResult(intent, 0);
+        } catch (ProviderHelper.NotFoundException e) {
+            Log.e(Constants.TAG, "key not found!", e);
+        }
     }
 
     private void certifyKey(Uri dataUri) {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ShareQrCodeDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ShareQrCodeDialogFragment.java
index b6ff139df..d2d21093e 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ShareQrCodeDialogFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ShareQrCodeDialogFragment.java
@@ -33,6 +33,7 @@ import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.QrCodeUtils;
 
 import java.util.ArrayList;
@@ -106,7 +107,12 @@ public class ShareQrCodeDialogFragment extends DialogFragment {
             mText.setText(R.string.share_qr_code_dialog_start);
 
             // TODO works, but
-            long masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), dataUri);
+            long masterKeyId = 0;
+            try {
+                masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), dataUri);
+            } catch (ProviderHelper.NotFoundException e) {
+                Log.e(Constants.TAG, "key not found!", e);
+            }
             // get public keyring as ascii armored string
             ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
                     getActivity(), new long[] { masterKeyId });