aes.c File Reference

#include <string.h>
#include "config.h"
#include "aes.h"
#include "aes_internal.h"
#include "attributes.h"
#include "error.h"
#include "intreadwrite.h"
#include "macros.h"
#include "mem.h"
#include "thread.h"

Go to the source code of this file.

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

Functions
struct AVAES *	av_aes_alloc (void)
	Allocate an AVAES context. More...
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	aes_crypt (AVAES *a, int s, const uint8_t *sbox, uint32_t multbl[][256])
static void	aes_encrypt (AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int rounds)
static void	aes_decrypt (AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int rounds)
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. More...
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 av_cold void	aes_init_static (void)
int	av_aes_init (AVAES *a, const uint8_t *key, int key_bits, int decrypt)
	Initialize an AVAES context. More...

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]
static AVOnce	aes_static_init = AV_ONCE_INIT

Macro Definition Documentation

ROT

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

Definition at line 59 of file aes.c.

Function Documentation

addkey()

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

inlinestatic

Definition at line 62 of file aes.c.

Referenced by aes_crypt().

addkey_s()

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

inlinestatic

Definition at line 69 of file aes.c.

Referenced by aes_decrypt(), and aes_encrypt().

addkey_d()

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

inlinestatic

Definition at line 76 of file aes.c.

Referenced by aes_decrypt(), and aes_encrypt().

subshift()

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

static

Definition at line 83 of file aes.c.

Referenced by aes_crypt(), and av_aes_init().

mix_core()

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

inlinestatic

Definition at line 108 of file aes.c.

Referenced by mix().

mix()

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

inlinestatic

Definition at line 117 of file aes.c.

Referenced by aes_crypt(), and av_aes_init().

aes_crypt()

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

inlinestatic

Definition at line 126 of file aes.c.

Referenced by aes_decrypt(), and aes_encrypt().

aes_encrypt()

static void aes_encrypt ( AVAES *  a, uint8_t *  dst, const uint8_t *  src, int  count, uint8_t *  iv, int  rounds  )

static

Definition at line 139 of file aes.c.

Referenced by av_aes_init().

aes_decrypt()

static void aes_decrypt ( AVAES *  a, uint8_t *  dst, const uint8_t *  src, int  count, uint8_t *  iv, int  rounds  )

static

Definition at line 155 of file aes.c.

Referenced by av_aes_init().

init_multbl2()

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 177 of file aes.c.

Referenced by aes_init_static().

aes_init_static()

static av_cold void aes_init_static ( void  )

static

Definition at line 204 of file aes.c.

Referenced by av_aes_init().

Variable Documentation

rcon

const uint8_t rcon[10]

static

Initial value:

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

Definition at line 42 of file aes.c.

Referenced by av_aes_init().

sbox

uint8_t sbox[256]

static

Definition at line 46 of file aes.c.

Referenced by aes_crypt(), aes_encrypt(), aes_init_static(), av_aes_init(), and init_multbl2().

inv_sbox

uint8_t inv_sbox[256]

static

Definition at line 47 of file aes.c.

Referenced by aes_decrypt(), and aes_init_static().

enc_multbl

uint32_t enc_multbl[4][256]

static

Definition at line 52 of file aes.c.

Referenced by aes_encrypt(), and aes_init_static().

dec_multbl

uint32_t dec_multbl[4][256]

static

Definition at line 53 of file aes.c.

Referenced by aes_decrypt(), aes_init_static(), and av_aes_init().

aes_static_init

AVOnce aes_static_init = AV_ONCE_INIT

static

Definition at line 202 of file aes.c.

Referenced by av_aes_init().