one_step_kdf.c File Reference

One-Step KDF. More...

#include "core/crypto.h"
#include "kdf/one_step_kdf.h"
#include "mac/mac_algorithms.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Functions
error_t	oneStepKdf (OneStepKdfType type, const HashAlgo *hashAlgo, const uint8_t *z, size_t zLen, const uint8_t *salt, size_t saltLen, const uint8_t *otherInfo, size_t otherInfoLen, uint8_t *dk, size_t dkLen)
	One-Step KDF function. More...
error_t	oneStepKdfHash (const HashAlgo *hashAlgo, const uint8_t *z, size_t zLen, const uint8_t *otherInfo, size_t otherInfoLen, uint8_t *dk, size_t dkLen)
	One-Step KDF function (with hash-based auxiliary function) More...
error_t	oneStepKdfHmac (const HashAlgo *hashAlgo, const uint8_t *z, size_t zLen, const uint8_t *salt, size_t saltLen, const uint8_t *otherInfo, size_t otherInfoLen, uint8_t *dk, size_t dkLen)
	One-Step KDF function (with HMAC-based auxiliary function) More...
error_t	oneStepKdfKmac (uint_t strength, size_t hLen, const uint8_t *z, size_t zLen, const uint8_t *salt, size_t saltLen, const uint8_t *otherInfo, size_t otherInfoLen, uint8_t *dk, size_t dkLen)
	One-Step KDF function (with KMAC-based auxiliary function) More...

Detailed Description

One-Step KDF.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2026 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneCRYPTO Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Description

One-Step KDF is a key derivation function defined by NIST SP 800-56C revision 1, section 4

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.6.6

Definition in file one_step_kdf.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 37 of file one_step_kdf.c.

Function Documentation

oneStepKdf()

error_t oneStepKdf	(	OneStepKdfType	type,
		const HashAlgo *	hashAlgo,
		const uint8_t *	z,
		size_t	zLen,
		const uint8_t *	salt,
		size_t	saltLen,
		const uint8_t *	otherInfo,
		size_t	otherInfoLen,
		uint8_t *	dk,
		size_t	dkLen
	)

One-Step KDF function.

Parameters

[in]	type	Auxiliary function H (hash, HMAC or KMAC)
[in]	hashAlgo	Underlying hash function (for hash and HMAC-based auxiliary functions only)
[in]	z	Shared secret Z
[in]	zLen	Length of the shared secret Z, in bytes
[in]	salt	Salt value (for HMAC and KMAC-based auxiliary functions only)
[in]	saltLen	Length of the salt value, in bytes
[in]	otherInfo	Context-specific information (optional parameter)
[in]	otherInfoLen	Length of the context-specific information, in bytes
[out]	dk	Derived keying material
[in]	dkLen	Length of the keying material to be generated, in bytes

Returns

Error code

Definition at line 80 of file one_step_kdf.c.

oneStepKdfHash()

error_t oneStepKdfHash	(	const HashAlgo *	hashAlgo,
		const uint8_t *	z,
		size_t	zLen,
		const uint8_t *	otherInfo,
		size_t	otherInfoLen,
		uint8_t *	dk,
		size_t	dkLen
	)

One-Step KDF function (with hash-based auxiliary function)

Parameters

[in]	hashAlgo	Underlying hash function
[in]	z	Shared secret Z
[in]	zLen	Length of the shared secret Z, in bytes
[in]	otherInfo	Context-specific information (optional parameter)
[in]	otherInfoLen	Length of the context-specific information, in bytes
[out]	dk	Derived keying material
[in]	dkLen	Length of the keying material to be generated, in bytes

Returns

Error code

Definition at line 131 of file one_step_kdf.c.

oneStepKdfHmac()

error_t oneStepKdfHmac	(	const HashAlgo *	hashAlgo,
		const uint8_t *	z,
		size_t	zLen,
		const uint8_t *	salt,
		size_t	saltLen,
		const uint8_t *	otherInfo,
		size_t	otherInfoLen,
		uint8_t *	dk,
		size_t	dkLen
	)

One-Step KDF function (with HMAC-based auxiliary function)

Parameters

[in]	hashAlgo	Underlying hash function
[in]	z	Shared secret Z
[in]	zLen	Length of the shared secret Z, in bytes
[in]	salt	Salt value
[in]	saltLen	Length of the salt, in bytes
[in]	otherInfo	Context-specific information (optional parameter)
[in]	otherInfoLen	Length of the context-specific information, in bytes
[out]	dk	Derived keying material
[in]	dkLen	Length of the keying material to be generated, in bytes

Returns

Error code

Definition at line 212 of file one_step_kdf.c.

oneStepKdfKmac()

error_t oneStepKdfKmac	(	uint_t	strength,
		size_t	hLen,
		const uint8_t *	z,
		size_t	zLen,
		const uint8_t *	salt,
		size_t	saltLen,
		const uint8_t *	otherInfo,
		size_t	otherInfoLen,
		uint8_t *	dk,
		size_t	dkLen
	)

One-Step KDF function (with KMAC-based auxiliary function)

Parameters

[in]	strength	Number of bits of security (128 for KMAC128 and 256 for KMAC256)
[in]	hLen	Length of of the auxiliary function output, in bytes
[in]	z	Shared secret Z
[in]	zLen	Length of the shared secret Z, in bytes
[in]	salt	Salt value
[in]	saltLen	Length of the salt, in bytes
[in]	otherInfo	Context-specific information (optional parameter)
[in]	otherInfoLen	Length of the context-specific information, in bytes
[out]	dk	Derived keying material
[in]	dkLen	Length of the keying material to be generated, in bytes

Returns

Error code

Definition at line 314 of file one_step_kdf.c.