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https://github.com/tillitis/tillitis-key1.git
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44 lines
999 B
C
44 lines
999 B
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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static const uint8_t allowed_app_digest[32] = {
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0xb6, 0x86, 0x1b, 0x26, 0xef, 0x69, 0x77, 0x12, 0xed, 0x6c, 0xca,
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0xe8, 0x35, 0xb4, 0x5c, 0x01, 0x07, 0x71, 0xab, 0xce, 0x3f, 0x30,
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0x79, 0xda, 0xe6, 0xf9, 0xee, 0x4b, 0xe2, 0x06, 0x95, 0x33,
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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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{
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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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