kopia lustrzana https://github.com/espressif/esp-idf
47 wiersze
1.2 KiB
C
47 wiersze
1.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "bootloader_sha.h"
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <sys/param.h>
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#include "esp32c61/rom/sha.h"
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static SHA_CTX ctx;
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//TODO: [ESP32C61] IDF-9234
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bootloader_sha256_handle_t bootloader_sha256_start()
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{
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// Enable SHA hardware
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ets_sha_enable();
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ets_sha_init(&ctx, SHA2_256);
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return &ctx; // Meaningless non-NULL value
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}
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void bootloader_sha256_data(bootloader_sha256_handle_t handle, const void *data, size_t data_len)
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{
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assert(handle != NULL);
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/* C61 secure boot key field consists of 1 byte of curve identifier and 64 bytes of ECDSA public key.
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* While verifying the signature block, we need to calculate the SHA of this key field which is of 65 bytes.
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* ets_sha_update handles it cleanly so we can safely remove the check:
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* assert(data_len % 4) == 0
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*/
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ets_sha_update(&ctx, data, data_len, false);
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}
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void bootloader_sha256_finish(bootloader_sha256_handle_t handle, uint8_t *digest)
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{
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assert(handle != NULL);
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if (digest == NULL) {
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bzero(&ctx, sizeof(ctx));
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return;
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}
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ets_sha_finish(&ctx, digest);
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}
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