Add logging for user permission interactions.

bug:21078221

Change-Id: Ie5bfb4c6013faf528b95eda0d5caf1c591f1e439

1 files changed, 72 insertions, 0 deletions

diff --git a/src/com/android/packageinstaller/permission/utils/SafetyNetLogger.java b/src/com/android/packageinstaller/permission/utils/SafetyNetLogger.java
new file mode 100644
index 00000000..0163b750
--- /dev/null
+++ b/src/com/android/packageinstaller/permission/utils/SafetyNetLogger.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.packageinstaller.permission.utils;
+
+import android.content.pm.PackageInfo;
+import android.util.EventLog;
+import com.android.packageinstaller.permission.model.PermissionGroup;
+
+import java.util.List;
+
+public final class SafetyNetLogger {
+
+    // The log tag used by SafetyNet to pick entries from the event log.
+    private static final int SNET_NET_EVENT_LOG_TAG = 0x534e4554;
+
+    // Log tag for the result of permissions request.
+    private static final String PERMISSIONS_REQUESTED = "permissions_requested";
+
+    // Log tag for the result of permissions toggling.
+    private static final String PERMISSIONS_TOGGLED = "permissions_toggled";
+
+    private SafetyNetLogger() {
+        /* do nothing */
+    }
+
+    public static void logPermissionsRequested(PackageInfo packageInfo,
+            List<PermissionGroup> groups) {
+        EventLog.writeEvent(SNET_NET_EVENT_LOG_TAG, PERMISSIONS_REQUESTED,
+                packageInfo.applicationInfo.uid, buildChangedGroupForPackageMessage(
+                        packageInfo.packageName, groups));
+    }
+
+    public static void logPermissionsToggled(String packageName, List<PermissionGroup> groups) {
+        EventLog.writeEvent(SNET_NET_EVENT_LOG_TAG, PERMISSIONS_TOGGLED,
+                android.os.Process.myUid(), buildChangedGroupForPackageMessage(
+                        packageName, groups));
+    }
+
+    private static String buildChangedGroupForPackageMessage(String packageName,
+            List<PermissionGroup> groups) {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append(packageName).append(':');
+
+        final int groupCount = groups.size();
+        for (int i = 0; i < groupCount; i++) {
+            PermissionGroup group = groups.get(i);
+            if (i > 0) {
+                builder.append(';');
+            }
+            builder.append(group.getName()).append('|');
+            builder.append(group.areRuntimePermissionsGranted()).append('|');
+            builder.append(group.getFlags());
+        }
+
+        return builder.toString();
+    }
+}