AES-CTR

Macros
#define	AES_CTR_KEY_SIZE   (16)
#define	AES_CTR_IV_SIZE   (8)

Functions
struct AVAESCTR *	av_aes_ctr_alloc (void)
	Allocate an AVAESCTR context. 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...
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. 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...
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...
void	av_aes_ctr_increment_iv (struct AVAESCTR *a)
	Increment the top 64 bit of the iv (performed after each frame) More...

Detailed Description

Macro Definition Documentation

AES_CTR_KEY_SIZE

#define AES_CTR_KEY_SIZE   (16)

Definition at line 35 of file aes_ctr.h.

AES_CTR_IV_SIZE

#define AES_CTR_IV_SIZE   (8)

Definition at line 36 of file aes_ctr.h.

Function Documentation

av_aes_ctr_alloc()

struct AVAESCTR* av_aes_ctr_alloc

(

void

)

Allocate an AVAESCTR context.

Definition at line 40 of file aes_ctr.c.

Referenced by cenc_scheme_decrypt(), cens_scheme_decrypt(), 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

a	The AVAESCTR context to initialize
key	encryption key, must have a length of AES_CTR_KEY_SIZE

Definition at line 73 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.

Parameters

a	The AVAESCTR context

Definition at line 83 of file aes_ctr.c.

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

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.

Parameters

a	The AVAESCTR context
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 107 of file aes_ctr.c.

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

av_aes_ctr_get_iv()

const uint8_t* av_aes_ctr_get_iv

(

struct AVAESCTR *

a

)

Get the current iv.

Definition at line 58 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 63 of file aes_ctr.c.

Referenced by 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 45 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 52 of file aes_ctr.c.

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

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 100 of file aes_ctr.c.

Referenced by mov_cenc_end_packet().