1/* 2 * Copyright (C) 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 17syntax = "proto2"; 18 19package android.system.security.keystore2; 20 21// Logging constants re-used by multiple atoms related to keystore2 22 23enum SecurityLevelEnum { 24 // Unspecified takes 0. Other values are incremented by 1 compared to keymint spec. 25 SECURITY_LEVEL_UNSPECIFIED = 0; 26 SECURITY_LEVEL_SOFTWARE = 1; 27 SECURITY_LEVEL_TRUSTED_ENVIRONMENT = 2; 28 SECURITY_LEVEL_STRONGBOX = 3; 29 SECURITY_LEVEL_KEYSTORE = 4; 30} 31 32enum Algorithm { 33 // ALGORITHM is prepended because UNSPECIFIED exists in other enums as well. 34 ALGORITHM_UNSPECIFIED = 0; 35 // Asymmetric algorithms. 36 RSA = 1; 37 // 2 removed, do not reuse. 38 EC = 3; 39 // Block cipher algorithms 40 AES = 32; 41 TRIPLE_DES = 33; 42 // MAC algorithms 43 HMAC = 128; 44}; 45