69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* * Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* * Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in
|
||
|
|
* the documentation and/or other materials provided with the
|
||
|
|
* distribution.
|
||
|
|
* * Neither the name of Intel Corporation nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef HKDF_H
|
||
|
|
#define HKDF_H
|
||
|
|
|
||
|
|
#include <types.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FUNCTION
|
||
|
|
* hkdf_sha256
|
||
|
|
*
|
||
|
|
* Description
|
||
|
|
* HMAC-based Extract-and-Expand Key Derivation Function.
|
||
|
|
*
|
||
|
|
* Parameters:
|
||
|
|
* out_key Pointer to key buffer which is used to save
|
||
|
|
* hkdf_sha256 result
|
||
|
|
* out_len The length of out_key
|
||
|
|
* secret Pointer to input keying material
|
||
|
|
* secret_len The length of secret
|
||
|
|
* salt Pointer to salt buffer, it is optional
|
||
|
|
* if not provided (salt == NULL), it is set internally
|
||
|
|
* to a string of hashlen(32) zeros
|
||
|
|
* salt_len The length of the salt value
|
||
|
|
* Ignored if salt is NULL
|
||
|
|
* info Pointer to application specific information, it is
|
||
|
|
* optional
|
||
|
|
* Ignored if info == NULL or a zero-length string
|
||
|
|
* info_len: The length of the info, ignored if info is NULL
|
||
|
|
*
|
||
|
|
* OUTPUTS
|
||
|
|
* 1 - Success
|
||
|
|
* 0 - Failure
|
||
|
|
*/
|
||
|
|
int 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);
|
||
|
|
|
||
|
|
#endif /* HKDF_H */
|