1 /* 2 * Copyright (C) 2020 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 #pragma once 17 18 #include <stdint.h> 19 #include <stddef.h> 20 21 /** 22 * This is a redefinition of KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE in 23 * system/security/keystore/keystore_attestation_id.h and must be kept in sync. 24 * There is a static assert in aaid.cpp to assure that they are in sync. 25 * We redefine this here to avoid unnecessary build dependencies for 26 * the rust bindgen target. 27 */ 28 constexpr const size_t KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE = 1024; 29 30 extern "C" { 31 /** 32 * Fills the buffer at aaid with the attestation application id of the app uid. 33 * The buffer must be exactly KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE bytes in size. 34 * *aaid_size is set to the number of bytes written to aaid. 35 * 36 * @param uid the uid of the app to retrieve the aaid for. 37 * @param aaid output buffer for the attestation id. 38 * @param aaid_size must be set to the size of the output buffer, which must be exactly 39 * KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE bytes in size, by the caller. On success 40 * it is set to the number of bytes written. 41 * @return OK on success. 42 */ 43 uint32_t aaid_keystore_attestation_id(uint32_t uid, uint8_t* aaid, size_t* aaid_size); 44 } 45