38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#include "shared-bindings/hashlib/Hash.h"
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#include "shared-module/hashlib/__init__.h"
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#include "mbedtls/ssl.h"
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void common_hal_hashlib_hash_update(hashlib_hash_obj_t *self, const uint8_t *data, size_t datalen) {
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if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
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mbedtls_sha1_update_ret(&self->sha1, data, datalen);
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return;
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}
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}
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void common_hal_hashlib_hash_digest(hashlib_hash_obj_t *self, uint8_t *data, size_t datalen) {
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if (datalen < common_hal_hashlib_hash_get_digest_size(self)) {
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return;
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}
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if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
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// We copy the sha1 state so we can continue to update if needed or get
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// the digest a second time.
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mbedtls_sha1_context copy;
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mbedtls_sha1_clone(©, &self->sha1);
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mbedtls_sha1_finish_ret(&self->sha1, data);
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mbedtls_sha1_clone(&self->sha1, ©);
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}
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}
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size_t common_hal_hashlib_hash_get_digest_size(hashlib_hash_obj_t *self) {
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if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
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return 20;
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}
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return 0;
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}
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