blowfish.c File Reference

Blowfish encryption algorithm. More...

#include "core/crypto.h"
#include "cipher/blowfish.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Functions
error_t	blowfishInit (BlowfishContext *context, const uint8_t *key, size_t keyLen)
	Initialize a Blowfish context using the supplied key. More...
error_t	blowfishInitState (BlowfishContext *context)
	Blowfish state initialization. More...
error_t	blowfishExpandKey (BlowfishContext *context, const uint8_t *salt, size_t saltLen, const uint8_t *key, size_t keyLen)
	Key expansion. More...
void	blowfishEncryptBlock (BlowfishContext *context, const uint8_t *input, uint8_t *output)
	Encrypt a 8-byte block using Blowfish algorithm. More...
void	blowfishDecryptBlock (BlowfishContext *context, const uint8_t *input, uint8_t *output)
	Decrypt a 8-byte block using Blowfish algorithm. More...
void	blowfishXorBlock (uint8_t *data, const uint8_t *salt, size_t saltLen, size_t *saltIndex)
	XOR data block with random salt. More...
void	blowfishDeinit (BlowfishContext *context)
	Release Blowfish context. More...

Variables
const CipherAlgo	blowfishCipherAlgo

Detailed Description

Blowfish encryption algorithm.

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.

Description

Blowfish is an encryption algorithm designed to encipher and decipher blocks of 128 bits under control of a 128/192/256-bit secret key

Author

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

Version

2.5.4

Definition in file blowfish.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 37 of file blowfish.c.

Function Documentation

blowfishDecryptBlock()

void blowfishDecryptBlock	(	BlowfishContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Decrypt a 8-byte block using Blowfish algorithm.

Parameters

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

Definition at line 461 of file blowfish.c.

blowfishDeinit()

void blowfishDeinit

(

BlowfishContext *

context

)

Release Blowfish context.

Parameters

[in]

context

Pointer to the Blowfish context

Definition at line 548 of file blowfish.c.

blowfishEncryptBlock()

void blowfishEncryptBlock	(	BlowfishContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Encrypt a 8-byte block using Blowfish algorithm.

Parameters

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

Definition at line 411 of file blowfish.c.

blowfishExpandKey()

error_t blowfishExpandKey	(	BlowfishContext *	context,
		const uint8_t *	salt,
		size_t	saltLen,
		const uint8_t *	key,
		size_t	keyLen
	)

Key expansion.

Parameters

[in]	context	Pointer to the Blowfish context
[in]	salt	Random salt
[in]	saltLen	Length of the random salt, in bytes
[in]	key	Secret key
[in]	keyLen	Length of the secret key, in bytes

Returns

Error code

Definition at line 291 of file blowfish.c.

blowfishInit()

error_t blowfishInit	(	BlowfishContext *	context,
		const uint8_t *	key,
		size_t	keyLen
	)

Initialize a Blowfish context using the supplied key.

Parameters

[in]	context	Pointer to the Blowfish context to initialize
[in]	key	Pointer to the key
[in]	keyLen	Length of the key

Returns

Error code

Definition at line 227 of file blowfish.c.

blowfishInitState()

error_t blowfishInitState

(

BlowfishContext *

context

)

Blowfish state initialization.

Parameters

[in]

context

Pointer to the Blowfish context

Returns

Error code

Definition at line 257 of file blowfish.c.

blowfishXorBlock()

void blowfishXorBlock	(	uint8_t *	data,
		const uint8_t *	salt,
		size_t	saltLen,
		size_t *	saltIndex
	)

XOR data block with random salt.

Parameters

[in,out]	data	Pointer the data block (16 bytes)
[in]	salt	Pointer to the random salt (16 bytes)
[in]	saltLen	Length of the salt, in bytes
[in,out]	saltIndex	Current salt index

Definition at line 512 of file blowfish.c.

Variable Documentation

blowfishCipherAlgo

const CipherAlgo blowfishCipherAlgo

Initial value:

=
{
   "Blowfish",
   sizeof(BlowfishContext),
   CIPHER_ALGO_TYPE_BLOCK,
   BLOWFISH_BLOCK_SIZE,
   (CipherAlgoInit) blowfishInit,
   NULL,
   NULL,
   (CipherAlgoEncryptBlock) blowfishEncryptBlock,
   (CipherAlgoDecryptBlock) blowfishDecryptBlock,
   (CipherAlgoDeinit) blowfishDeinit
}

Definition at line 204 of file blowfish.c.