1 /* 2 * Copyright 2021, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.security.metrics; 18 19 /** 20 * Algorithm enum as defined in stats/enums/system/security/keystore2/enums.proto. 21 * @hide 22 */ 23 @Backing(type="int") 24 enum Algorithm { 25 /** ALGORITHM is prepended because UNSPECIFIED exists in other enums as well. */ 26 ALGORITHM_UNSPECIFIED = 0, 27 28 /** Asymmetric algorithms. */ 29 RSA = 1, 30 31 /** 2 removed, do not reuse. */ 32 EC = 3, 33 34 /** Block cipher algorithms. */ 35 AES = 32, 36 TRIPLE_DES = 33, 37 38 /** MAC algorithms. */ 39 HMAC = 128, 40 }