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https://github.com/tillitis/tillitis-key1.git
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46 lines
1 KiB
C
46 lines
1 KiB
C
// Copyright (C) 2024 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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#include <stdbool.h>
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#include <stdint.h>
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#include <tkey/io.h>
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#include <tkey/lib.h>
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#include "mgmt_app.h"
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// Lock down what app can start from flash slot 0.
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//
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// To update this, compute the BLAKE2s digest of the app.bin
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// clang-format off
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static const uint8_t allowed_app_digest[32] = {
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0x85, 0x29, 0xe3, 0x25, 0xf5, 0x8d, 0x53, 0x5f,
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0xe1, 0x2a, 0x77, 0x92, 0xe7, 0xdc, 0x4b, 0x4d,
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0x01, 0x85, 0x17, 0xca, 0xfd, 0x54, 0x83, 0xb3,
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0xbb, 0x28, 0x4f, 0xa1, 0x98, 0x5f, 0x9e, 0x56,
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};
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// clang-format on
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static uint8_t current_app_digest[32];
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int mgmt_app_init(uint8_t app_digest[32])
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{
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if (app_digest == NULL) {
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return -1;
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}
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memcpy_s(current_app_digest, sizeof(current_app_digest), app_digest,
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32);
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return 0;
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}
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// Authenticate an management app
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bool mgmt_app_authenticate(void)
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{
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return memeq(current_app_digest, allowed_app_digest, 32) != 0;
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}
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uint8_t *mgmt_app_allowed_digest(void)
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{
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return (uint8_t *)allowed_app_digest;
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}
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