Mbed TLS v3.6.7
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hkdf.h
Go to the documentation of this file.
1
9/*
10 * Copyright The Mbed TLS Contributors
11 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
12 */
13#ifndef MBEDTLS_HKDF_H
14#define MBEDTLS_HKDF_H
15
16#include "mbedtls/build_info.h"
17
18#include "mbedtls/md.h"
19
25#define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA -0x5F80
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
56int mbedtls_hkdf(const mbedtls_md_info_t *md, const unsigned char *salt,
57 size_t salt_len, const unsigned char *ikm, size_t ikm_len,
58 const unsigned char *info, size_t info_len,
59 unsigned char *okm, size_t okm_len);
60
85int mbedtls_hkdf_extract(const mbedtls_md_info_t *md,
86 const unsigned char *salt, size_t salt_len,
87 const unsigned char *ikm, size_t ikm_len,
88 unsigned char *prk);
89
116int mbedtls_hkdf_expand(const mbedtls_md_info_t *md, const unsigned char *prk,
117 size_t prk_len, const unsigned char *info,
118 size_t info_len, unsigned char *okm, size_t okm_len);
119
120#ifdef __cplusplus
121}
122#endif
123
124#endif /* hkdf.h */
mbedtls_hkdf_expand
int mbedtls_hkdf_expand(const mbedtls_md_info_t *md, const unsigned char *prk, size_t prk_len, const unsigned char *info, size_t info_len, unsigned char *okm, size_t okm_len)
Expand the supplied prk into several additional pseudorandom keys, which is the output of the HKDF.
mbedtls_hkdf_extract
int mbedtls_hkdf_extract(const mbedtls_md_info_t *md, const unsigned char *salt, size_t salt_len, const unsigned char *ikm, size_t ikm_len, unsigned char *prk)
Take the input keying material ikm and extract from it a fixed-length pseudorandom key prk.
mbedtls_hkdf
int mbedtls_hkdf(const mbedtls_md_info_t *md, const unsigned char *salt, size_t salt_len, const unsigned char *ikm, size_t ikm_len, const unsigned char *info, size_t info_len, unsigned char *okm, size_t okm_len)
This is the HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
build_info.h
Build-time configuration info.
md.h
This file contains the generic functions for message-digest (hashing) and HMAC.
mbedtls_md_info_t
struct mbedtls_md_info_t mbedtls_md_info_t
Definition md.h:107