51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <rtl.h>
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#include "mbedtls/hkdf.h"
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#include "mbedtls/md.h"
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int32_t hkdf_sha256(uint8_t *out_key, size_t out_len,
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const uint8_t *secret, size_t secret_len,
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const uint8_t *salt, size_t salt_len,
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const uint8_t *info, size_t info_len)
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{
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int32_t ret = 0;
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const mbedtls_md_info_t *md;
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/* salt and info can be NULL, others can't */
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if ((out_key != NULL) && (secret != NULL)) {
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md = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
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if (md != NULL) {
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if (mbedtls_hkdf(md, salt, salt_len, secret, secret_len,
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info, info_len, out_key, out_len) == 0) {
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ret = 1;
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}
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}
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}
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return ret;
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}
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int32_t hmac_sha256(uint8_t *out_key,
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const uint8_t *secret, size_t secret_len,
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const uint8_t *salt, size_t salt_len)
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{
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int32_t ret = 0;
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const mbedtls_md_info_t *md;
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if ((out_key != NULL) && (secret != NULL) && (salt != NULL)) {
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md = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
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if (md != NULL) {
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if (mbedtls_md_hmac(md, secret, secret_len, salt, salt_len, out_key) == 0) {
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ret = 1;
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}
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}
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}
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return ret;
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}
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