| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.chrome.browser.identity; |
| |
| import android.content.Context; |
| import android.provider.Settings; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.chromium.chrome.browser.util.HashUtil; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Unique identificator implementation that uses the Settings.Secure.ANDROID_ID field and MD5 |
| * hashing. |
| */ |
| public class SettingsSecureBasedIdentificationGenerator implements UniqueIdentificationGenerator { |
| public static final String GENERATOR_ID = "SETTINGS_SECURE_ANDROID_ID"; |
| private final Context mContext; |
| |
| public SettingsSecureBasedIdentificationGenerator(Context context) { |
| // Since we do not know the lifetime of the given context, we get the application context |
| // to ensure it is always possible to use it. |
| mContext = context.getApplicationContext(); |
| } |
| |
| @Override |
| public String getUniqueId(@Nullable String salt) { |
| String androidId = getAndroidId(); |
| if (androidId == null) { |
| return ""; |
| } |
| |
| String md5Hash = HashUtil.getMd5Hash( |
| new HashUtil.Params(androidId).withSalt(salt)); |
| return md5Hash == null ? "" : md5Hash; |
| } |
| |
| @VisibleForTesting |
| String getAndroidId() { |
| return Settings.Secure.getString(mContext.getContentResolver(), Settings.Secure.ANDROID_ID); |
| } |
| } |