service: add trust id result to decryptVerify operation

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/TrustIdentityDataAccessObject.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014-2016 Vincent Breitmoser <v.breitmoser@mugenguild.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.provider;
+
+
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+
+import org.sufficientlysecure.keychain.provider.KeychainContract.ApiTrustIdentity;
+
+
+public class TrustIdentityDataAccessObject {
+    private final SimpleContentResolverInterface mQueryInterface;
+    private final String packageName;
+
+
+    public TrustIdentityDataAccessObject(Context context, String packageName) {
+        this.packageName = packageName;
+
+        final ContentResolver contentResolver = context.getContentResolver();
+        mQueryInterface = new SimpleContentResolverInterface() {
+            @Override
+            public Cursor query(Uri contentUri, String[] projection, String selection, String[] selectionArgs,
+                    String sortOrder) {
+                return contentResolver.query(contentUri, projection, selection, selectionArgs, sortOrder);
+            }
+
+            @Override
+            public Uri insert(Uri contentUri, ContentValues values) {
+                return contentResolver.insert(contentUri, values);
+            }
+
+            @Override
+            public int update(Uri contentUri, ContentValues values, String where, String[] selectionArgs) {
+                return contentResolver.update(contentUri, values, where, selectionArgs);
+            }
+
+            @Override
+            public int delete(Uri contentUri, String where, String[] selectionArgs) {
+                return contentResolver.delete(contentUri, where, selectionArgs);
+            }
+        };
+    }
+
+    public TrustIdentityDataAccessObject(SimpleContentResolverInterface queryInterface, String packageName) {
+        mQueryInterface = queryInterface;
+        this.packageName = packageName;
+    }
+
+    public Long getMasterKeyIdForTrustId(String trustId) {
+        Cursor cursor = mQueryInterface.query(
+                ApiTrustIdentity.buildByPackageNameAndTrustId(packageName, trustId), null, null, null, null);
+
+        try {
+            if (cursor != null && cursor.moveToFirst()) {
+                int masterKeyIdColumn = cursor.getColumnIndex(ApiTrustIdentity.MASTER_KEY_ID);
+                return cursor.getLong(masterKeyIdColumn);
+            }
+        } finally {
+            if (cursor != null) {
+                cursor.close();
+            }
+        }
+
+        return null;
+    }
+}