| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, copy, |
| * modify, merge, publish, distribute, sublicense, and/or sell copies |
| * of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #if !defined(AVB_INSIDE_LIBAVB_ATX_H) && !defined(AVB_COMPILATION) |
| #error \ |
| "Never include this file directly, include libavb_atx/libavb_atx.h instead." |
| #endif |
| |
| #ifndef AVB_ATX_VALIDATE_H_ |
| #define AVB_ATX_VALIDATE_H_ |
| |
| #include "avb_atx_ops.h" |
| #include "avb_atx_types.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* Rollback index locations for Android Things key versions. */ |
| /* Local modification for Newman. See lib/fuchsia/README.md. |
| * |
| * Due to fxb/55224, slots 30 and 31 have been burned and should not be used on |
| * Newman. |
| */ |
| #define AVB_ATX_PIK_VERSION_LOCATION 29 |
| #define AVB_ATX_PSK_VERSION_LOCATION 28 |
| |
| /* An implementation of validate_vbmeta_public_key for Android Things. See |
| * libavb/avb_ops.h for details on validate_vbmeta_public_key in general. This |
| * implementation uses the metadata expected with Android Things vbmeta images |
| * to perform validation on the public key. The ATX ops must be implemented. |
| * That is, |ops->atx_ops| must be valid. |
| * |
| * There are a multiple values that need verification: |
| * - Permanent Product Attributes: A hash of these attributes is fused into |
| * hardware. Consistency is checked. |
| * - Product Root Key (PRK): This key is provided in permanent attributes and |
| * is the root authority for all Android Things |
| * products. |
| * - Product Intermediate Key (PIK): This key is a rotated intermediary. It is |
| * certified by the PRK. |
| * - Product Signing Key (PSK): This key is a rotated authority for a specific |
| * Android Things product. It is certified by a |
| * PIK and must match |public_key_data|. |
| * - Product ID: This value is provided in permanent attributes and is unique |
| * to a specific Android Things product. This value must match |
| * the subject of the PSK certificate. |
| */ |
| AvbIOResult avb_atx_validate_vbmeta_public_key( |
| AvbOps* ops, |
| const uint8_t* public_key_data, |
| size_t public_key_length, |
| const uint8_t* public_key_metadata, |
| size_t public_key_metadata_length, |
| bool* out_is_trusted); |
| |
| /* Generates a challenge which can be used to create an unlock credential. */ |
| AvbIOResult avb_atx_generate_unlock_challenge( |
| AvbAtxOps* atx_ops, AvbAtxUnlockChallenge* out_unlock_challenge); |
| |
| /* Validates an unlock credential. The certificate validation is very similar to |
| * the validation of public key metadata except in place of the PSK is a Product |
| * Unlock Key (PUK) and the certificate usage field identifies it as such. The |
| * challenge signature field is verified against this PUK. |
| */ |
| AvbIOResult avb_atx_validate_unlock_credential( |
| AvbAtxOps* atx_ops, |
| const AvbAtxUnlockCredential* unlock_credential, |
| bool* out_is_trusted); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* AVB_ATX_VALIDATE_H_ */ |
