1 /*
2 * Copyright (C) 2018-2022 Intel Corporation.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <rtl.h>
8 #include "mbedtls/hkdf.h"
9 #include "mbedtls/md.h"
10
hkdf_sha256(uint8_t * out_key,size_t out_len,const uint8_t * secret,size_t secret_len,const uint8_t * salt,size_t salt_len,const uint8_t * info,size_t info_len)11 int32_t hkdf_sha256(uint8_t *out_key, size_t out_len,
12 const uint8_t *secret, size_t secret_len,
13 const uint8_t *salt, size_t salt_len,
14 const uint8_t *info, size_t info_len)
15 {
16 int32_t ret = 0;
17 const mbedtls_md_info_t *md;
18
19 /* salt and info can be NULL, others can't */
20 if ((out_key != NULL) && (secret != NULL)) {
21 md = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
22 if (md != NULL) {
23 if (mbedtls_hkdf(md, salt, salt_len, secret, secret_len,
24 info, info_len, out_key, out_len) == 0) {
25 ret = 1;
26 }
27 }
28 }
29
30 return ret;
31 }
32
hmac_sha256(uint8_t * out_key,const uint8_t * secret,size_t secret_len,const uint8_t * salt,size_t salt_len)33 int32_t hmac_sha256(uint8_t *out_key,
34 const uint8_t *secret, size_t secret_len,
35 const uint8_t *salt, size_t salt_len)
36 {
37 int32_t ret = 0;
38 const mbedtls_md_info_t *md;
39
40 if ((out_key != NULL) && (secret != NULL) && (salt != NULL)) {
41 md = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
42 if (md != NULL) {
43 if (mbedtls_md_hmac(md, secret, secret_len, salt, salt_len, out_key) == 0) {
44 ret = 1;
45 }
46 }
47 }
48
49 return ret;
50 }
51