aes_ctr.c File Reference

#include "common.h"
#include "aes_ctr.h"
#include "aes.h"
#include "random_seed.h"

Go to the source code of this file.

Data Structures
struct	AVAESCTR

Macros
#define	AES_BLOCK_SIZE   (16)

Functions
struct AVAESCTR *	av_aes_ctr_alloc (void)
	Allocate an AVAESCTR context. More...
void	av_aes_ctr_set_iv (struct AVAESCTR *a, const uint8_t *iv)
	Forcefully change the 8-byte iv. More...
void	av_aes_ctr_set_full_iv (struct AVAESCTR *a, const uint8_t *iv)
	Forcefully change the "full" 16-byte iv, including the counter. More...
const uint8_t *	av_aes_ctr_get_iv (struct AVAESCTR *a)
	Get the current iv. More...
void	av_aes_ctr_set_random_iv (struct AVAESCTR *a)
	Generate a random iv. More...
int	av_aes_ctr_init (struct AVAESCTR *a, const uint8_t *key)
	Initialize an AVAESCTR context. More...
void	av_aes_ctr_free (struct AVAESCTR *a)
	Release an AVAESCTR context. More...
static void	av_aes_ctr_increment_be64 (uint8_t *counter)
void	av_aes_ctr_increment_iv (struct AVAESCTR *a)
	Increment the top 64 bit of the iv (performed after each frame) More...
void	av_aes_ctr_crypt (struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int count)
	Process a buffer using a previously initialized context. More...

Macro Definition Documentation

#define AES_BLOCK_SIZE   (16)

Definition at line 27 of file aes_ctr.c.

Referenced by av_aes_ctr_crypt().

Function Documentation

struct AVAESCTR* av_aes_ctr_alloc

(

void

)

Allocate an AVAESCTR context.

Definition at line 36 of file aes_ctr.c.

Referenced by cenc_decrypt(), ff_mov_cenc_init(), and main().

void av_aes_ctr_set_iv	(	struct AVAESCTR *	a,
		const uint8_t *	iv
	)

Forcefully change the 8-byte iv.

Definition at line 41 of file aes_ctr.c.

Referenced by av_aes_ctr_set_random_iv().

void av_aes_ctr_set_full_iv	(	struct AVAESCTR *	a,
		const uint8_t *	iv
	)

Forcefully change the "full" 16-byte iv, including the counter.

Definition at line 48 of file aes_ctr.c.

Referenced by cenc_decrypt(), and main().

const uint8_t* av_aes_ctr_get_iv

(

struct AVAESCTR *

a

)

Get the current iv.

Definition at line 54 of file aes_ctr.c.

Referenced by main(), and mov_cenc_start_packet().

void av_aes_ctr_set_random_iv

(

struct AVAESCTR *

a

)

Generate a random iv.

Definition at line 59 of file aes_ctr.c.

Referenced by ff_mov_cenc_init(), and main().

int av_aes_ctr_init	(	struct AVAESCTR *	a,
		const uint8_t *	key
	)

Initialize an AVAESCTR context.

Parameters

key	encryption key, must have a length of AES_CTR_KEY_SIZE

Definition at line 69 of file aes_ctr.c.

Referenced by cenc_decrypt(), ff_mov_cenc_init(), and main().

void av_aes_ctr_free

(

struct AVAESCTR *

a

)

Release an AVAESCTR context.

Definition at line 84 of file aes_ctr.c.

Referenced by ff_mov_cenc_free(), main(), and mov_read_close().

static void av_aes_ctr_increment_be64 ( uint8_t *  counter )

static

Definition at line 92 of file aes_ctr.c.

Referenced by av_aes_ctr_crypt(), and av_aes_ctr_increment_iv().

void av_aes_ctr_increment_iv

(

struct AVAESCTR *

a

)

Increment the top 64 bit of the iv (performed after each frame)

Definition at line 104 of file aes_ctr.c.

Referenced by mov_cenc_end_packet().

void av_aes_ctr_crypt	(	struct AVAESCTR *	a,
		uint8_t *	dst,
		const uint8_t *	src,
		int	size
	)

Process a buffer using a previously initialized context.

Parameters

dst	destination array, can be equal to src
src	source array, can be equal to dst
size	the size of src and dst

Definition at line 111 of file aes_ctr.c.

Referenced by cenc_decrypt(), main(), and mov_cenc_write_encrypted().