sha256.c File Reference

SHA-256 (Secure Hash Algorithm 256) More...

#include "core/crypto.h"
#include "hash/sha256.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL
#define	W(n)   w[(n) & 0x0F]
#define	CH(x, y, z)   (((x) & (y)) | (~(x) & (z)))
#define	MAJ(x, y, z)   (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
#define	SIGMA1(x)   (ROR32(x, 2) ^ ROR32(x, 13) ^ ROR32(x, 22))
#define	SIGMA2(x)   (ROR32(x, 6) ^ ROR32(x, 11) ^ ROR32(x, 25))
#define	SIGMA3(x)   (ROR32(x, 7) ^ ROR32(x, 18) ^ SHR32(x, 3))
#define	SIGMA4(x)   (ROR32(x, 17) ^ ROR32(x, 19) ^ SHR32(x, 10))

Functions
__weak_func error_t	sha256Compute (const void *data, size_t length, uint8_t *digest)
	Digest a message using SHA-256. More...
__weak_func void	sha256Init (Sha256Context *context)
	Initialize SHA-256 message digest context. More...
__weak_func void	sha256Update (Sha256Context *context, const void *data, size_t length)
	Update the SHA-256 context with a portion of the message being hashed. More...
__weak_func void	sha256Final (Sha256Context *context, uint8_t *digest)
	Finish the SHA-256 message digest. More...
__weak_func void	sha256FinalRaw (Sha256Context *context, uint8_t *digest)
	Finish the SHA-256 message digest (no padding added) More...
__weak_func void	sha256ProcessBlock (Sha256Context *context)
	Process message in 16-word blocks. More...

Variables
const uint8_t	SHA256_OID [9] = {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}
const HashAlgo	sha256HashAlgo

Detailed Description

SHA-256 (Secure Hash Algorithm 256)

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

SHA-256 is a secure hash algorithm for computing a condensed representation of an electronic message. Refer to FIPS 180-4 for more details

Author

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

Version

2.5.4

Definition in file sha256.c.

Macro Definition Documentation

CH

#define CH	(		x,
			y,
			z
	)		(((x) & (y)) | (~(x) & (z)))

Definition at line 50 of file sha256.c.

MAJ

#define MAJ	(		x,
			y,
			z
	)		(((x) & (y)) | ((x) & (z)) | ((y) & (z)))

Definition at line 51 of file sha256.c.

SIGMA1

#define SIGMA1

(

x

)

(ROR32(x, 2) ^ ROR32(x, 13) ^ ROR32(x, 22))

Definition at line 52 of file sha256.c.

SIGMA2

#define SIGMA2

(

x

)

(ROR32(x, 6) ^ ROR32(x, 11) ^ ROR32(x, 25))

Definition at line 53 of file sha256.c.

SIGMA3

#define SIGMA3

(

x

)

(ROR32(x, 7) ^ ROR32(x, 18) ^ SHR32(x, 3))

Definition at line 54 of file sha256.c.

SIGMA4

#define SIGMA4

(

x

)

(ROR32(x, 17) ^ ROR32(x, 19) ^ SHR32(x, 10))

Definition at line 55 of file sha256.c.

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 37 of file sha256.c.

W

#define W

(

n

)

w[(n) & 0x0F]

Definition at line 47 of file sha256.c.

Function Documentation

sha256Compute()

__weak_func error_t sha256Compute	(	const void *	data,
		size_t	length,
		uint8_t *	digest
	)

Digest a message using SHA-256.

Parameters

[in]	data	Pointer to the message being hashed
[in]	length	Length of the message
[out]	digest	Pointer to the calculated digest

Returns

Error code

Definition at line 116 of file sha256.c.

sha256Final()

__weak_func void sha256Final	(	Sha256Context *	context,
		uint8_t *	digest
	)

Finish the SHA-256 message digest.

Parameters

[in]	context	Pointer to the SHA-256 context
[out]	digest	Calculated digest

Definition at line 226 of file sha256.c.

sha256FinalRaw()

__weak_func void sha256FinalRaw	(	Sha256Context *	context,
		uint8_t *	digest
	)

Finish the SHA-256 message digest (no padding added)

Parameters

[in]	context	Pointer to the SHA-256 context
[out]	digest	Calculated digest

Definition at line 272 of file sha256.c.

sha256Init()

__weak_func void sha256Init

(

Sha256Context *

context

)

Initialize SHA-256 message digest context.

Parameters

[in]

context

Pointer to the SHA-256 context to initialize

Definition at line 161 of file sha256.c.

sha256ProcessBlock()

__weak_func void sha256ProcessBlock

(

Sha256Context *

context

)

Process message in 16-word blocks.

Parameters

[in]

context

Pointer to the SHA-256 context

Definition at line 289 of file sha256.c.

sha256Update()

__weak_func void sha256Update	(	Sha256Context *	context,
		const void *	data,
		size_t	length
	)

Update the SHA-256 context with a portion of the message being hashed.

Parameters

[in]	context	Pointer to the SHA-256 context
[in]	data	Pointer to the buffer being hashed
[in]	length	Length of the buffer

Definition at line 187 of file sha256.c.

Variable Documentation

SHA256_OID

const uint8_t SHA256_OID[9] = {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}

Definition at line 80 of file sha256.c.

sha256HashAlgo

const HashAlgo sha256HashAlgo

Initial value:

=
{
   "SHA-256",
   SHA256_OID,
   sizeof(SHA256_OID),
   sizeof(Sha256Context),
   SHA256_BLOCK_SIZE,
   SHA256_DIGEST_SIZE,
   SHA256_MIN_PAD_SIZE,
   TRUE,
   (HashAlgoCompute) sha256Compute,
   (HashAlgoInit) sha256Init,
   (HashAlgoUpdate) sha256Update,
   (HashAlgoFinal) sha256Final,
 
 
 
 
 
 
   (HashAlgoFinalRaw) sha256FinalRaw
 
}

Definition at line 83 of file sha256.c.