salsa20.c File Reference

Salsa20 encryption algorithm. More...

#include "core/crypto.h"
#include "cipher/salsa20.h"

Go to the source code of this file.


#define SALSA20_QUARTER_ROUND(a, b, c, d)


void salsa20ProcessBlock (const uint8_t *input, uint8_t *output, uint_t nr)
 Salsa20 core function. More...

Detailed Description

Salsa20 encryption algorithm.


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

Copyright (C) 2010-2019 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.

Oryx Embedded SARL (

Definition in file salsa20.c.

Macro Definition Documentation


#define SALSA20_QUARTER_ROUND (   a,
{ \
b ^= ROL32(a + d, 7); \
c ^= ROL32(b + a, 9); \
d ^= ROL32(c + b, 13); \
a ^= ROL32(d + c, 18); \

Definition at line 42 of file salsa20.c.



Definition at line 32 of file salsa20.c.

Function Documentation

◆ salsa20ProcessBlock()

void salsa20ProcessBlock ( const uint8_t *  input,
uint8_t *  output,
uint_t  nr 

Salsa20 core function.

[in]inputPointer to the 64-octet input block
[out]outputPointer to the 64-octet output block
[in]nrNumber of rounds to be applied (8, 12 or 20)

Definition at line 58 of file salsa20.c.

uint8_t a
Definition: ndp.h:410
uint8_t b[6]
Definition: dtls_misc.h:139
#define ROL32(a, n)
Definition: crypto.h:917