TEA

Functions
struct AVTEA *	av_tea_alloc (void)
	Allocate an AVTEA context To free the struct: av_free(ptr)
void	av_tea_init (struct AVTEA *ctx, const uint8_t key[16], int rounds)
	Initialize an AVTEA context.
void	av_tea_crypt (struct AVTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
	Encrypt or decrypt a buffer using a previously initialized context.

Variables
const int	av_tea_size

Detailed Description

Function Documentation

av_tea_alloc()

struct AVTEA * av_tea_alloc

(

void

)

Allocate an AVTEA context To free the struct: av_free(ptr)

av_tea_init()

void av_tea_init	(	struct AVTEA *	ctx,
		const uint8_t	key[16],
		int	rounds
	)

Initialize an AVTEA context.

Parameters

ctx	an AVTEA context
key	a key of 16 bytes used for encryption/decryption
rounds	the number of rounds in TEA (64 is the "standard")

av_tea_crypt()

void av_tea_crypt	(	struct AVTEA *	ctx,
		uint8_t *	dst,
		const uint8_t *	src,
		int	count,
		uint8_t *	iv,
		int	decrypt
	)

Encrypt or decrypt a buffer using a previously initialized context.

Parameters

ctx	an AVTEA context
dst	destination array, can be equal to src
src	source array, can be equal to dst
count	number of 8 byte blocks
iv	initialization vector for CBC mode, if NULL then ECB will be used
decrypt	0 for encryption, 1 for decryption

Variable Documentation

av_tea_size

const int av_tea_size

extern