Mbed TLS v3.6.0
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hkdf.h
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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
26 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
56 int 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 
86  const unsigned char *salt, size_t salt_len,
87  const unsigned char *ikm, size_t ikm_len,
88  unsigned char *prk);
89 
116 int 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 */
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 functions for message-digest (hashing) and HMAC.
struct mbedtls_md_info_t mbedtls_md_info_t
Definition: md.h:107