| /* |
| * Copyright (C) 2018 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.tools.analytics |
| |
| import com.android.utils.ILogger |
| import com.google.common.base.Charsets |
| import com.google.common.hash.Hashing |
| import java.io.IOException |
| import java.nio.charset.Charset |
| |
| /** |
| * Anonymizes strings for analytics reporting. Each string is sha256 encoded with a salt that is |
| * unique per user and rotated every 28 days with a predictable time window. |
| */ |
| object Anonymizer { |
| /** Anonymizes a utf8 string. Logs any issues reading the salt for anonymizing. */ |
| @Throws(IOException::class) |
| @JvmStatic |
| fun anonymizeUtf8(logger: ILogger, data: String?): String { |
| return anonymize(logger, data, Charsets.UTF_8) |
| } |
| |
| /** |
| * Anonymizes a string based on provided charset. Logs any issues reading the salt for |
| * anonymizing. |
| */ |
| @Throws(IOException::class) |
| @JvmStatic |
| fun anonymize( |
| logger: ILogger, data: String?, charset: Charset): String { |
| if (data == null || data == "") { |
| return "" |
| } |
| val hasher = Hashing.sha256().newHasher() |
| hasher.putBytes(AnalyticsSettings.salt) |
| hasher.putString(data, charset) |
| return hasher.hash().toString() |
| } |
| } |