ChaCha.c File Reference

#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/OcCryptoLib.h>

Go to the source code of this file.

Macros
#define	U32V(v)
#define	ROTATE(v, c)
#define	XOR(v, w)
#define	PLUS(v, w)
#define	PLUSONE(v)
#define	LOAD32_LE(a)
#define	STORE32_LE(a, v)
#define	QUARTERROUND(a, b, c, d)

Functions
VOID	ChaChaInitCtx (OUT CHACHA_CONTEXT *Context, IN CONST UINT8 *Key, IN CONST UINT8 *Iv, IN UINT32 Counter)
VOID	ChaChaCryptBuffer (IN OUT CHACHA_CONTEXT *Context, IN CONST UINT8 *Source, OUT UINT8 *Destination, IN UINT32 Length)

Detailed Description

OcCryptoLib

Copyright (c) 2020, vit9696

All rights reserved.

This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Definition in file ChaCha.c.

Macro Definition Documentation

LOAD32_LE

#define LOAD32_LE

(

a

)

Value:

(ReadUnaligned32 ((UINT32 *)(a)))

Definition at line 34 of file ChaCha.c.

PLUS

#define PLUS	(		v,
			w )

Value:

(U32V((v) + (w)))

Definition at line 32 of file ChaCha.c.

PLUSONE

#define PLUSONE

(

v

)

Value:

(PLUS((v), 1))

Definition at line 33 of file ChaCha.c.

QUARTERROUND

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

Value:

  a = PLUS(a, b);                \
  d = ROTATE(XOR(d, a), 16);     \
  c = PLUS(c, d);                \
  b = ROTATE(XOR(b, c), 12);     \
  a = PLUS(a, b);                \
  d = ROTATE(XOR(d, a), 8);      \
  c = PLUS(c, d);                \
  b = ROTATE(XOR(b, c), 7);

Definition at line 37 of file ChaCha.c.

ROTATE

#define ROTATE	(		v,
			c )

Value:

(LRotU32 ((v), (c)))

Definition at line 30 of file ChaCha.c.

STORE32_LE

#define STORE32_LE	(		a,
			v )

Value:

(WriteUnaligned32 ((UINT32 *)(a), (v)))

Definition at line 35 of file ChaCha.c.

U32V

#define U32V

(

v

)

Value:

((UINT32)(v) & 0xFFFFFFFFU)

Definition at line 29 of file ChaCha.c.

XOR

#define XOR	(		v,
			w )

Value:

((v) ^ (w))

Definition at line 31 of file ChaCha.c.

Function Documentation

ChaChaCryptBuffer()

VOID ChaChaCryptBuffer	(	IN OUT CHACHA_CONTEXT *	Context,
		IN CONST UINT8 *	Source,
		OUT UINT8 *	Destination,
		IN UINT32	Length )

Perform ChaCha encryption/decryption. Source may match Destination.

Parameters

[in,out]	Context	ChaCha context.
[in]	Source	Data for transformation.
[out]	Destination	Resulting data.
[in]	Length	Data and ciphertext lengths.

Definition at line 74 of file ChaCha.c.

ChaChaInitCtx()

VOID ChaChaInitCtx	(	OUT CHACHA_CONTEXT *	Context,
		IN CONST UINT8 *	Key,
		IN CONST UINT8 *	Iv,
		IN UINT32	Counter )

Setup ChaCha context (IETF variant).

Parameters

[out]	Context	ChaCha context.
[in]	Key	ChaCha 256-bit key.
[in]	Iv	ChaCha 96-bit initialisation vector.
[in]	Counter	ChaCha 32-bit counter.

Definition at line 48 of file ChaCha.c.