mbed TLS v2.23.0

hkdf.h
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1
9 /*
10 * Copyright (C) 2018-2019, ARM Limited, All Rights Reserved
11 * SPDX-License-Identifier: Apache-2.0
12 *
13 * Licensed under the Apache License, Version 2.0 (the "License"); you may
14 * not use this file except in compliance with the License.
15 * You may obtain a copy of the License at
16 *
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the License for the specific language governing permissions and
23 * limitations under the License.
24 *
25 * This file is part of mbed TLS (https://tls.mbed.org)
26 */
27 #ifndef MBEDTLS_HKDF_H
28 #define MBEDTLS_HKDF_H
29
30 #if !defined(MBEDTLS_CONFIG_FILE)
31 #include "mbedtls/config.h"
32 #else
33 #include MBEDTLS_CONFIG_FILE
34 #endif
35
36 #include "mbedtls/md.h"
37
42 #define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA -0x5F80
43 /* \} name */
44
45 #ifdef __cplusplus
46 extern "C" {
47 #endif
48
73 int mbedtls_hkdf( const mbedtls_md_info_t *md, const unsigned char *salt,
74 size_t salt_len, const unsigned char *ikm, size_t ikm_len,
75 const unsigned char *info, size_t info_len,
76 unsigned char *okm, size_t okm_len );
77
102 int mbedtls_hkdf_extract( const mbedtls_md_info_t *md,
103 const unsigned char *salt, size_t salt_len,
104 const unsigned char *ikm, size_t ikm_len,
105 unsigned char *prk );
106
133 int mbedtls_hkdf_expand( const mbedtls_md_info_t *md, const unsigned char *prk,
134 size_t prk_len, const unsigned char *info,
135 size_t info_len, unsigned char *okm, size_t okm_len );
136
137 #ifdef __cplusplus
138 }
139 #endif
140
141 #endif /* hkdf.h */
md.h
This file contains the generic message-digest wrapper.
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
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).
mbedtls_md_info_t
struct mbedtls_md_info_t mbedtls_md_info_t
Definition: md.h:86
md
#define md
Definition: compat-1.3.h:1988
config.h
Configuration options (set of defines)
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.