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7a3a539b17
internal commit: 14ac2bc2299032fa6714d1fefa7cf0987b3e3085 Signed-off-by: Eddie Dong <eddie.dong@intel.com>
69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HKDF_H
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#define HKDF_H
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#include <types.h>
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/*
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* FUNCTION
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* hkdf_sha256
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*
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* Description
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* HMAC-based Extract-and-Expand Key Derivation Function.
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*
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* Parameters:
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* out_key Pointer to key buffer which is used to save
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* hkdf_sha256 result
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* out_len The length of out_key
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* secret Pointer to input keying material
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* secret_len The length of secret
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* salt Pointer to salt buffer, it is optional
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* if not provided (salt == NULL), it is set internally
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* to a string of hashlen(32) zeros
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* salt_len The length of the salt value
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* Ignored if salt is NULL
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* info Pointer to application specific information, it is
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* optional
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* Ignored if info == NULL or a zero-length string
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* info_len: The length of the info, ignored if info is NULL
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*
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* OUTPUTS
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* 1 - Success
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* 0 - Failure
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*/
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int hkdf_sha256(uint8_t *out_key, size_t out_len,
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const uint8_t *secret, size_t secret_len,
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const uint8_t *salt, size_t salt_len,
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const uint8_t *info, size_t info_len);
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#endif /* HKDF_H */
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