1 /* 2 * Copyright (C) 2014 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 #include <stdint.h> 18 19 #ifndef ANDROID_HARDWARE_HW_AUTH_TOKEN_H 20 #define ANDROID_HARDWARE_HW_AUTH_TOKEN_H 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif // __cplusplus 25 26 #define HW_AUTH_TOKEN_VERSION 0 27 28 typedef enum { 29 HW_AUTH_NONE = 0, 30 HW_AUTH_PASSWORD = 1 << 0, 31 HW_AUTH_FINGERPRINT = 1 << 1, 32 // Additional entries should be powers of 2. 33 HW_AUTH_ANY = UINT32_MAX, 34 } hw_authenticator_type_t; 35 36 /** 37 * Data format for an authentication record used to prove successful authentication. 38 */ 39 typedef struct __attribute__((__packed__)) { 40 uint8_t version; // Current version is 0 41 uint64_t challenge; 42 uint64_t user_id; // secure user ID, not Android user ID 43 uint64_t authenticator_id; // secure authenticator ID 44 uint32_t authenticator_type; // hw_authenticator_type_t, in network order 45 uint64_t timestamp; // in network order 46 uint8_t hmac[32]; 47 } hw_auth_token_t; 48 49 #ifdef __cplusplus 50 } // extern "C" 51 #endif // __cplusplus 52 53 #endif // ANDROID_HARDWARE_HW_AUTH_TOKEN_H 54