get rid of PgpKeyHelper.getMasterKeyId

Closes #575

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java

@@ -620,12 +620,19 @@ public class PgpDecryptVerify {
         // go through all signatures
         // and find out for which signature we have a key in our database
         Long masterKeyId = null;
+        String primaryUserId = null;
         int signatureIndex = 0;
         for (int i = 0; i < sigList.size(); ++i) {
             try {
                 Uri uri = KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(
                         Long.toString(sigList.get(i).getKeyID()));
-                masterKeyId = mProviderHelper.getMasterKeyId(uri);
+                Map<String, Object> data = mProviderHelper.getGenericData(uri,
+                        new String[] { KeyRings.MASTER_KEY_ID, KeyRings.USER_ID },
+                        new int[] { ProviderHelper.FIELD_TYPE_INTEGER,
+                                ProviderHelper.FIELD_TYPE_STRING }
+                );
+                masterKeyId = (Long) data.get(KeyRings.MASTER_KEY_ID);
+                primaryUserId = (String) data.get(KeyRings.USER_ID);
                 signatureIndex = i;
             } catch (ProviderHelper.NotFoundException e) {
                 Log.d(Constants.TAG, "key not found!");
@@ -652,9 +659,8 @@ public class PgpDecryptVerify {
 
             signatureResultBuilder.signatureAvailable(true);
             signatureResultBuilder.knownKey(true);
-            // TODO: uses the first user id not primary user id
+            signatureResultBuilder.userId(primaryUserId);
-            signatureResultBuilder.userId(PgpKeyHelper.getMainUserId(publicKeyRing.getPublicKey()));
+            signatureResultBuilder.keyId(masterKeyId);
-            signatureResultBuilder.keyId(publicKeyRing.getPublicKey().getKeyID());
 
             JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider =
                     new JcaPGPContentVerifierBuilderProvider()

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java

@@ -225,30 +225,6 @@ public class PgpKeyHelper {
         return signingKeys.get(0);
     }
 
-    @SuppressWarnings("unchecked")
-    public static String getMainUserId(PGPPublicKey key) {
-        for (String userId : new IterableIterator<String>(key.getUserIDs())) {
-            return userId;
-        }
-        return null;
-    }
-
-    @SuppressWarnings("unchecked")
-    public static String getMainUserId(PGPSecretKey key) {
-        for (String userId : new IterableIterator<String>(key.getUserIDs())) {
-            return userId;
-        }
-        return null;
-    }
-
-    public static String getMainUserIdSafe(Context context, PGPSecretKey key) {
-        String userId = getMainUserId(key);
-        if (userId == null || userId.equals("")) {
-            userId = context.getString(R.string.user_id_no_name);
-        }
-        return userId;
-    }
-
     public static int getKeyUsage(PGPSecretKey key) {
         return getKeyUsage(key.getPublicKey());
     }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncrypt.java

@@ -42,6 +42,7 @@ import org.spongycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder;
 import org.spongycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.util.InputData;
 import org.sufficientlysecure.keychain.util.Log;
@@ -281,9 +282,12 @@ public class PgpSignEncrypt {
         PGPSecretKey signingKey = null;
         PGPSecretKeyRing signingKeyRing = null;
         PGPPrivateKey signaturePrivateKey = null;
+        String signingUserId = null;
         if (enableSignature) {
             try {
                 signingKeyRing = mProviderHelper.getPGPSecretKeyRing(mSignatureMasterKeyId);
+                signingUserId = (String) mProviderHelper.getUnifiedData(mSignatureMasterKeyId,
+                        KeychainContract.KeyRings.USER_ID, ProviderHelper.FIELD_TYPE_STRING);
             } catch (ProviderHelper.NotFoundException e) {
                 throw new NoSigningKeyException();
             }
@@ -369,9 +373,8 @@ public class PgpSignEncrypt {
                 signatureGenerator = new PGPSignatureGenerator(contentSignerBuilder);
                 signatureGenerator.init(signatureType, signaturePrivateKey);
 
-                String userId = PgpKeyHelper.getMainUserId(signingKeyRing.getSecretKey());
                 PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
-                spGen.setSignerUserID(false, userId);
+                spGen.setSignerUserID(false, signingUserId);
                 signatureGenerator.setHashedSubpackets(spGen.generate());
             }
         }

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

@@ -50,6 +50,7 @@ import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
 import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.service.PassphraseCacheService;
 import org.sufficientlysecure.keychain.util.Log;
@@ -134,13 +135,17 @@ public class PassphraseDialogFragment extends DialogFragment implements OnEditor
         alert.setTitle(R.string.title_authentication);
 
         final PGPSecretKey secretKey;
+        final String userId;
 
         if (secretKeyId == Constants.key.symmetric || secretKeyId == Constants.key.none) {
             secretKey = null;
             alert.setMessage(R.string.passphrase_for_symmetric_encryption);
         } else {
             try {
-                secretKey = new ProviderHelper(activity).getPGPSecretKeyRing(secretKeyId).getSecretKey();
+                ProviderHelper helper = new ProviderHelper(activity);
+                secretKey = helper.getPGPSecretKeyRing(secretKeyId).getSecretKey();
+                userId = (String) helper.getUnifiedData(secretKeyId,
+                        KeychainContract.KeyRings.USER_ID, ProviderHelper.FIELD_TYPE_STRING);
             } catch (ProviderHelper.NotFoundException e) {
                 alert.setTitle(R.string.title_key_not_found);
                 alert.setMessage(getString(R.string.key_not_found, secretKeyId));
@@ -154,8 +159,6 @@ public class PassphraseDialogFragment extends DialogFragment implements OnEditor
                 return alert.create();
             }
 
-            String userId = PgpKeyHelper.getMainUserIdSafe(activity, secretKey);
-
             Log.d(Constants.TAG, "User id: '" + userId + "'");
             alert.setMessage(getString(R.string.passphrase_for, userId));
         }