libavutil/aes.c File Reference

#include "common.h"
#include "aes.h"
#include "intreadwrite.h"

Go to the source code of this file.

Data Structures
union	av_aes_block
struct	AVAES
Defines
#define	ROT(x, s)   ((x << s) | (x >> (32-s)))
Functions
static void	addkey (av_aes_block *dst, const av_aes_block *src, const av_aes_block *round_key)
static void	addkey_s (av_aes_block *dst, const uint8_t *src, const av_aes_block *round_key)
static void	addkey_d (uint8_t *dst, const av_aes_block *src, const av_aes_block *round_key)
static void	subshift (av_aes_block s0[2], int s, const uint8_t *box)
static int	mix_core (uint32_t multbl[][256], int a, int b, int c, int d)
static void	mix (av_aes_block state[2], uint32_t multbl[][256], int s1, int s3)
static void	crypt (AVAES *a, int s, const uint8_t *sbox, uint32_t multbl[][256])
void	av_aes_crypt (AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
	Encrypt or decrypt a buffer using a previously initialized context.
static void	init_multbl2 (uint32_t tbl[][256], const int c[4], const uint8_t *log8, const uint8_t *alog8, const uint8_t *sbox)
int	av_aes_init (AVAES *a, const uint8_t *key, int key_bits, int decrypt)
	Initialize an AVAES context.
Variables
const int	av_aes_size = sizeof(AVAES)
static const uint8_t	rcon [10]
static uint8_t	sbox [256]
static uint8_t	inv_sbox [256]
static uint32_t	enc_multbl [4][256]
static uint32_t	dec_multbl [4][256]

---

Define Documentation

#define ROT	(	x,
		s		)	((x << s) | (x >> (32-s)))

Definition at line 61 of file aes.c.

Referenced by init_multbl2(), and mix_core().

---

Function Documentation

static void addkey	(	av_aes_block *	dst,
		const av_aes_block *	src,
		const av_aes_block *	round_key
	)			[inline, static]

Definition at line 64 of file aes.c.

Referenced by crypt().

static void addkey_d	(	uint8_t *	dst,
		const av_aes_block *	src,
		const av_aes_block *	round_key
	)			[inline, static]

Definition at line 78 of file aes.c.

Referenced by av_aes_crypt().

static void addkey_s	(	av_aes_block *	dst,
		const uint8_t *	src,
		const av_aes_block *	round_key
	)			[inline, static]

Definition at line 71 of file aes.c.

Referenced by av_aes_crypt().

static void crypt	(	AVAES *	a,
		int	s,
		const uint8_t *	sbox,
		uint32_t	multbl[][256]
	)			[inline, static]

Definition at line 124 of file aes.c.

Referenced by av_aes_crypt().

static void init_multbl2	(	uint32_t	tbl[][256],
		const int	c[4],
		const uint8_t *	log8,
		const uint8_t *	alog8,
		const uint8_t *	sbox
	)			[static]

Definition at line 162 of file aes.c.

Referenced by av_aes_init().

static void mix	(	av_aes_block	state[2],
		uint32_t	multbl[][256],
		int	s1,
		int	s3
	)			[inline, static]

Definition at line 116 of file aes.c.

static int mix_core	(	uint32_t	multbl[][256],
		int	a,
		int	b,
		int	c,
		int	d
	)			[inline, static]

Definition at line 108 of file aes.c.

Referenced by mix().

static void subshift	(	av_aes_block	s0[2],
		int	s,
		const uint8_t *	box
	)			[static]

Definition at line 85 of file aes.c.

Referenced by av_aes_init(), and crypt().

---

Variable Documentation

uint32_t dec_multbl[4][256] [static]

Definition at line 55 of file aes.c.

Referenced by av_aes_crypt(), and av_aes_init().

uint32_t enc_multbl[4][256] [static]

Definition at line 54 of file aes.c.

Referenced by av_aes_crypt(), and av_aes_init().

uint8_t inv_sbox[256] [static]

Definition at line 49 of file aes.c.

Referenced by av_aes_crypt(), and av_aes_init().

const uint8_t rcon[10] [static]

Initial value:

 {
  0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
}

Definition at line 44 of file aes.c.

Referenced by av_aes_init().

uint8_t sbox[256] [static]

Definition at line 48 of file aes.c.

Referenced by av_aes_crypt(), and av_aes_init().