xdrbg.c File Reference

XDRBG pseudorandom number generator. More...

#include "core/crypto.h"
#include "rng/xdrbg.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Functions
error_t	xdrbgInit (XdrbgContext *context, const XofAlgo *xofAlgo)
	Initialize PRNG context. More...
error_t	xdrbgSeed (XdrbgContext *context, const uint8_t *seed, size_t length)
	Seed the PRNG state. More...
error_t	xdrbgSeedEx (XdrbgContext *context, const uint8_t *seed, size_t seedLen, const uint8_t *alpha, size_t alphaLen)
	Seed the PRNG state (with nonce and personalization string) More...
error_t	xdrbgReseed (XdrbgContext *context, const uint8_t *seed, size_t length)
	Reseed the PRNG state. More...
error_t	xdrbgReseedEx (XdrbgContext *context, const uint8_t *seed, size_t seedLen, const uint8_t *alpha, size_t alphaLen)
	Reseed the PRNG state (with additional input) More...
error_t	xdrbgGenerate (XdrbgContext *context, uint8_t *output, size_t length)
	Generate pseudorandom data. More...
error_t	xdrbgGenerateEx (XdrbgContext *context, const uint8_t *alpha, size_t alphaLen, uint8_t *output, size_t outputLen)
	Generate pseudorandom data (with additional input) More...
void	xdrbgDeinit (XdrbgContext *context)
	Release PRNG context. More...

Variables
const PrngAlgo	xdrbgPrngAlgo

Detailed Description

XDRBG pseudorandom number generator.

License

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

Copyright (C) 2010-2025 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.

Author

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

Version

2.5.4

Definition in file xdrbg.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 32 of file xdrbg.c.

Function Documentation

xdrbgDeinit()

void xdrbgDeinit

(

XdrbgContext *

context

)

Release PRNG context.

Parameters

[in]

context

Pointer to the XDRBG context

Definition at line 393 of file xdrbg.c.

xdrbgGenerate()

error_t xdrbgGenerate	(	XdrbgContext *	context,
		uint8_t *	output,
		size_t	length
	)

Generate pseudorandom data.

Parameters

[in]	context	Pointer to the XDRBG context
[out]	output	Buffer where to store the pseudorandom bytes
[in]	length	Requested number of bytes

Returns

Error code

Definition at line 299 of file xdrbg.c.

xdrbgGenerateEx()

error_t xdrbgGenerateEx	(	XdrbgContext *	context,
		const uint8_t *	alpha,
		size_t	alphaLen,
		uint8_t *	output,
		size_t	outputLen
	)

Generate pseudorandom data (with additional input)

Parameters

[in]	context	Pointer to the XDRBG context
[in]	alpha	Optional data
[in]	alphaLen	Length of the additional data, in bytes
[out]	output	Buffer where to store the pseudorandom bytes
[in]	outputLen	Requested number of bytes

Returns

Error code

Definition at line 316 of file xdrbg.c.

xdrbgInit()

error_t xdrbgInit	(	XdrbgContext *	context,
		const XofAlgo *	xofAlgo
	)

Initialize PRNG context.

Parameters

[in]	context	Pointer to the XDRBG context to initialize
[in]	xofAlgo	XOF algorithm

Returns

Error code

Definition at line 62 of file xdrbg.c.

xdrbgReseed()

error_t xdrbgReseed	(	XdrbgContext *	context,
		const uint8_t *	seed,
		size_t	length
	)

Reseed the PRNG state.

Parameters

[in]	context	Pointer to the XDRBG context
[in]	seed	Seed material
[in]	seedLen	Length of the seed material, in bytes

Returns

Error code

Definition at line 212 of file xdrbg.c.

xdrbgReseedEx()

error_t xdrbgReseedEx	(	XdrbgContext *	context,
		const uint8_t *	seed,
		size_t	seedLen,
		const uint8_t *	alpha,
		size_t	alphaLen
	)

Reseed the PRNG state (with additional input)

Parameters

[in]	context	Pointer to the XDRBG context
[in]	seed	Seed material
[in]	seedLen	Length of the seed material, in bytes
[in]	alpha	Optional data
[in]	alphaLen	Length of the additional data, in bytes

Returns

Error code

Definition at line 229 of file xdrbg.c.

xdrbgSeed()

error_t xdrbgSeed	(	XdrbgContext *	context,
		const uint8_t *	seed,
		size_t	length
	)

Seed the PRNG state.

Parameters

[in]	context	Pointer to the XDRBG context
[in]	seed	Seed material
[in]	seedLen	Length of the seed material, in bytes

Returns

Error code

Definition at line 130 of file xdrbg.c.

xdrbgSeedEx()

error_t xdrbgSeedEx	(	XdrbgContext *	context,
		const uint8_t *	seed,
		size_t	seedLen,
		const uint8_t *	alpha,
		size_t	alphaLen
	)

Seed the PRNG state (with nonce and personalization string)

Parameters

[in]	context	Pointer to the XDRBG context
[in]	seed	Seed material
[in]	seedLen	Length of the seed material, in bytes
[in]	alpha	Optional data
[in]	alphaLen	Length of the additional data, in bytes

Returns

Error code

Definition at line 147 of file xdrbg.c.

Variable Documentation

xdrbgPrngAlgo

const PrngAlgo xdrbgPrngAlgo

Initial value:

=
{
   "XDRBG",
   sizeof(XdrbgContext),
   (PrngAlgoInit) NULL,
   (PrngAlgoSeed) xdrbgSeed,
   (PrngAlgoReseed) xdrbgReseed,
   (PrngAlgoGenerate) xdrbgGenerate,
   (PrngAlgoDeinit) xdrbgDeinit
}

Definition at line 43 of file xdrbg.c.