mbed TLS v3.1.0
hkdf.h
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1 
9 /*
10  * Copyright The Mbed TLS Contributors
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 #ifndef MBEDTLS_HKDF_H
26 #define MBEDTLS_HKDF_H
27 
28 #include "mbedtls/build_info.h"
29 
30 #include "mbedtls/md.h"
31 
37 #define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA -0x5F80
38 /* \} name */
39 
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43 
68 int mbedtls_hkdf( const mbedtls_md_info_t *md, const unsigned char *salt,
69  size_t salt_len, const unsigned char *ikm, size_t ikm_len,
70  const unsigned char *info, size_t info_len,
71  unsigned char *okm, size_t okm_len );
72 
98  const unsigned char *salt, size_t salt_len,
99  const unsigned char *ikm, size_t ikm_len,
100  unsigned char *prk );
101 
128 int mbedtls_hkdf_expand( const mbedtls_md_info_t *md, const unsigned char *prk,
129  size_t prk_len, const unsigned char *info,
130  size_t info_len, unsigned char *okm, size_t okm_len );
131 
132 #ifdef __cplusplus
133 }
134 #endif
135 
136 #endif /* hkdf.h */
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).
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...
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...
Build-time configuration info.
This file contains the generic message-digest wrapper.
struct mbedtls_md_info_t mbedtls_md_info_t
Definition: md.h:88