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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Permission is hereby granted, free of charge, to any person
      5  * obtaining a copy of this software and associated documentation
      6  * files (the "Software"), to deal in the Software without
      7  * restriction, including without limitation the rights to use, copy,
      8  * modify, merge, publish, distribute, sublicense, and/or sell copies
      9  * of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be
     13  * included in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  */
     24 
     25 #if !defined(AVB_INSIDE_LIBAVB_ATX_H) && !defined(AVB_COMPILATION)
     26 #error \
     27     "Never include this file directly, include libavb_atx/libavb_atx.h instead."
     28 #endif
     29 
     30 #ifndef AVB_ATX_TYPES_H_
     31 #define AVB_ATX_TYPES_H_
     32 
     33 #include <libavb/libavb.h>
     34 
     35 #ifdef __cplusplus
     36 extern "C" {
     37 #endif
     38 
     39 /* Size in bytes of an Android Things product ID. */
     40 #define AVB_ATX_PRODUCT_ID_SIZE 16
     41 
     42 /* Size in bytes of a serialized public key with a 4096-bit modulus. */
     43 #define AVB_ATX_PUBLIC_KEY_SIZE (sizeof(AvbRSAPublicKeyHeader) + 1024)
     44 
     45 /* Data structure of Android Things permanent attributes. */
     46 typedef struct AvbAtxPermanentAttributes {
     47   uint32_t version;
     48   uint8_t product_root_public_key[AVB_ATX_PUBLIC_KEY_SIZE];
     49   uint8_t product_id[AVB_ATX_PRODUCT_ID_SIZE];
     50 } AVB_ATTR_PACKED AvbAtxPermanentAttributes;
     51 
     52 /* Data structure of signed fields in an Android Things certificate. */
     53 typedef struct AvbAtxCertificateSignedData {
     54   uint32_t version;
     55   uint8_t public_key[AVB_ATX_PUBLIC_KEY_SIZE];
     56   uint8_t subject[AVB_SHA256_DIGEST_SIZE];
     57   uint8_t usage[AVB_SHA256_DIGEST_SIZE];
     58   uint64_t key_version;
     59 } AVB_ATTR_PACKED AvbAtxCertificateSignedData;
     60 
     61 /* Data structure of an Android Things certificate. */
     62 typedef struct AvbAtxCertificate {
     63   AvbAtxCertificateSignedData signed_data;
     64   uint8_t signature[AVB_RSA4096_NUM_BYTES];
     65 } AVB_ATTR_PACKED AvbAtxCertificate;
     66 
     67 /* Data structure of Android Things public key metadata in vbmeta. */
     68 typedef struct AvbAtxPublicKeyMetadata {
     69   uint32_t version;
     70   AvbAtxCertificate product_intermediate_key_certificate;
     71   AvbAtxCertificate product_signing_key_certificate;
     72 } AVB_ATTR_PACKED AvbAtxPublicKeyMetadata;
     73 
     74 #ifdef __cplusplus
     75 }
     76 #endif
     77 
     78 #endif /* AVB_ATX_TYPES_H_ */
     79