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36 lines
962 B
C
36 lines
962 B
C
// Copyright (C) 2024 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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#include <tkey/lib.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "mgmt_app.h"
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// Locked down what app can start from first flash slot to be exactly
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// this size, producing this digest.
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//
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// To update this, compute the BLAKE2s digest of the app.bin
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static const uint8_t allowed_app_digest[32] = {
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0x98, 0xeb, 0x74, 0xdf, 0xd1, 0x7d, 0x06, 0xb1, 0x3f, 0xe4, 0x7d, 0x32,
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0x60, 0x71, 0xeb, 0x34, 0x0e, 0x40, 0xb1, 0x06, 0xf4, 0x0b, 0x15, 0x06,
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0x3c, 0xc5, 0xbc, 0x6d, 0x71, 0x9e, 0x4f, 0xe9,
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};
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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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if (memeq(app_digest, allowed_app_digest, 32)) {
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memcpy_s(current_app_digest, sizeof(current_app_digest), app_digest, 32);
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return 0;
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}
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return -1;
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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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