101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/**
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* Copyright (c) 2019 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**@file
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* @defgroup nrf_oberon_hkdf_1 HKDF APIs using SHA-1
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* @ingroup nrf_oberon_hkdf
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* @{
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* @brief Type declaration and APIs for the HKDF-SHA1 algorithm.
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*
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* HKDF-SHA1 is a key derivation function based on HMAC-SHA1.
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*
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* @see [RFC 5869 - HMAC-based Extract-and-Expand Key Derivation Function (HKDF)](http://tools.ietf.org/html/rfc5869)
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*/
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#ifndef OCRYPTO_HKDF_SHA1_H
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#define OCRYPTO_HKDF_SHA1_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Maximum length of a derived key.
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*/
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#define ocrypto_hkdf_sha1_LENGTH_MAX (20)
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/**
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* Maximum salt length.
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*/
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#define ocrypto_hkdf_sha1_SALT_LENGTH_MAX (40)
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/**
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* HKDF-SHA1 algorithm.
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*
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* A new pseudo-random key of length @p r_len is derived from an input key
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* @p key, a salt @p salt and additional information @p info. The new key is put
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* into @p r.
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*
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* @param[out] r Output key.
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* @param r_len Length of @p r, 0 < @p r_len <= @c ocrypto_hkdf_sha1_LENGTH_MAX.
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* @param key Input key.
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* @param key_len Length of @p key.
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* @param salt Salt.
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* @param salt_len Length of salt @p salt. 0 <= @p salt_len <= @c ocrypto_hkdf_sha1_SALT_LENGTH_MAX.
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* @param info Additional information.
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* @param info_len Length of @p info.
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*/
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void ocrypto_hkdf_sha1(
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uint8_t* r, size_t r_len,
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const uint8_t* key, size_t key_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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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef OCRYPTO_HKDF_SHA1_H */
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/** @} */
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