des.h File Reference

DES (Data Encryption Standard) More...

#include "core/crypto.h"

Go to the source code of this file.

Data Structures
struct	DesContext
	DES algorithm context. More...

Macros
#define	DES_PRIVATE_CONTEXT
#define	DES_BLOCK_SIZE   8
#define	DES_CIPHER_ALGO   (&desCipherAlgo)

Functions
error_t	desInit (DesContext *context, const uint8_t *key, size_t keyLen)
	Initialize a DES context using the supplied key. More...
void	desEncryptBlock (DesContext *context, const uint8_t *input, uint8_t *output)
	Encrypt a 8-byte block using DES algorithm. More...
void	desDecryptBlock (DesContext *context, const uint8_t *input, uint8_t *output)
	Decrypt a 8-byte block using DES algorithm. More...
void	desDeinit (DesContext *context)
	Release DES context. More...
void	desComputeKeyParity (const uint8_t *input, uint8_t *output)
	Convert a 56-bit key to a 64-bit key (with odd parity) More...
void	desFixKeyParity (uint8_t *key)
	Fix key parity. More...
bool_t	desCheckKeyParity (const uint8_t *key)
	Check key parity. More...

Variables
const uint8_t	DES_CBC_OID [5]
const CipherAlgo	desCipherAlgo

Detailed Description

DES (Data Encryption Standard)

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 des.h.

Macro Definition Documentation

DES_BLOCK_SIZE

#define DES_BLOCK_SIZE   8

Definition at line 43 of file des.h.

DES_CIPHER_ALGO

#define DES_CIPHER_ALGO   (&desCipherAlgo)

Definition at line 45 of file des.h.

DES_PRIVATE_CONTEXT

#define DES_PRIVATE_CONTEXT

Definition at line 39 of file des.h.

Function Documentation

desCheckKeyParity()

bool_t desCheckKeyParity

(

const uint8_t *

key

)

Check key parity.

Parameters

[in]

key

64-bit key

Returns

TRUE if the parity is correct, else FALSE

Definition at line 491 of file des.c.

desComputeKeyParity()

void desComputeKeyParity	(	const uint8_t *	input,
		uint8_t *	output
	)

Convert a 56-bit key to a 64-bit key (with odd parity)

Parameters

[in]	input	56-bit key
[out]	output	64-bit key (with odd parity)

Definition at line 442 of file des.c.

desDecryptBlock()

void desDecryptBlock	(	DesContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Decrypt a 8-byte block using DES algorithm.

Parameters

[in]	context	Pointer to the DES context
[in]	input	Ciphertext block to decrypt
[out]	output	Plaintext block resulting from decryption

Definition at line 391 of file des.c.

desDeinit()

void desDeinit

(

DesContext *

context

)

Release DES context.

Parameters

[in]

context

Pointer to the DES context

Definition at line 429 of file des.c.

desEncryptBlock()

void desEncryptBlock	(	DesContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Encrypt a 8-byte block using DES algorithm.

Parameters

[in]	context	Pointer to the DES context
[in]	input	Plaintext block to encrypt
[out]	output	Ciphertext block resulting from encryption

Definition at line 351 of file des.c.

desFixKeyParity()

void desFixKeyParity

(

uint8_t *

key

)

Fix key parity.

Parameters

[in,out]

key

64-bit key

Definition at line 464 of file des.c.

desInit()

error_t desInit	(	DesContext *	context,
		const uint8_t *	key,
		size_t	keyLen
	)

Initialize a DES context using the supplied key.

Parameters

[in]	context	Pointer to the DES context to initialize
[in]	key	Pointer to the key
[in]	keyLen	Length of the key (must be set to 8)

Returns

Error code

Definition at line 296 of file des.c.

Variable Documentation

DES_CBC_OID

const uint8_t DES_CBC_OID[5]

extern

Definition at line 270 of file des.c.

desCipherAlgo

const CipherAlgo desCipherAlgo

extern

Definition at line 273 of file des.c.