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

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

◆ AES_BLOCK_SIZE

#define AES_BLOCK_SIZE (16)

Definition at line 28 of file aes_ctr.c.

Function Documentation

◆ av_aes_ctr_alloc()

struct AVAESCTR* av_aes_ctr_alloc ( void )

Allocate an AVAESCTR context.

Definition at line 37 of file aes_ctr.c.

Referenced by cenc_scheme_decrypt(), cens_scheme_decrypt(), ff_mov_cenc_init(), and main().

◆ av_aes_ctr_set_iv()

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

Forcefully change the 8-byte iv.

Definition at line 42 of file aes_ctr.c.

Referenced by av_aes_ctr_set_random_iv().

◆ av_aes_ctr_set_full_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 49 of file aes_ctr.c.

Referenced by cenc_scheme_decrypt(), cens_scheme_decrypt(), and main().

◆ av_aes_ctr_get_iv()

const uint8_t* av_aes_ctr_get_iv ( struct AVAESCTR * a )

Get the current iv.

Definition at line 55 of file aes_ctr.c.

Referenced by main(), and mov_cenc_start_packet().

◆ av_aes_ctr_set_random_iv()

void av_aes_ctr_set_random_iv ( struct AVAESCTR * a )

Generate a random iv.

Definition at line 60 of file aes_ctr.c.

Referenced by ff_mov_cenc_init(), and main().

◆ av_aes_ctr_init()

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 70 of file aes_ctr.c.

Referenced by cenc_scheme_decrypt(), cens_scheme_decrypt(), ff_mov_cenc_init(), and main().

◆ av_aes_ctr_free()

void av_aes_ctr_free ( struct AVAESCTR * a )

Release an AVAESCTR context.

Definition at line 80 of file aes_ctr.c.

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

◆ av_aes_ctr_increment_be64()

static void av_aes_ctr_increment_be64 ( uint8_t * counter )

static

Definition at line 85 of file aes_ctr.c.

Referenced by av_aes_ctr_crypt(), and av_aes_ctr_increment_iv().

◆ 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 97 of file aes_ctr.c.

Referenced by mov_cenc_end_packet().

◆ av_aes_ctr_crypt()

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.