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https://github.com/tillitis/tillitis-key1.git
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43 lines
996 B
C
43 lines
996 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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0xf8, 0x90, 0x34, 0x31, 0xe0, 0xed, 0xab, 0x8b, 0x91, 0xe5, 0x63,
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0xe6, 0xea, 0x6a, 0x49, 0xe6, 0x53, 0x1e, 0xc7, 0x47, 0xca, 0x2f,
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0x2b, 0x8f, 0xf3, 0x5e, 0x67, 0x13, 0x0f, 0xfa, 0x93, 0x36,
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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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