RC4

Data Structures
struct	AVRC4

Functions
AVRC4 *	av_rc4_alloc (void)
	Allocate an AVRC4 context.
int	av_rc4_init (struct AVRC4 *d, const uint8_t *key, int key_bits, int decrypt)
	Initializes an AVRC4 context.
void	av_rc4_crypt (struct AVRC4 *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
	Encrypts / decrypts using the RC4 algorithm.

Detailed Description

Function Documentation

av_rc4_alloc()

AVRC4 * av_rc4_alloc

(

void

)

Allocate an AVRC4 context.

av_rc4_init()

int av_rc4_init	(	struct AVRC4 *	d,
		const uint8_t *	key,
		int	key_bits,
		int	decrypt
	)

Initializes an AVRC4 context.

Parameters

d	pointer to the AVRC4 context
key	buffer containig the key
key_bits	must be a multiple of 8
decrypt	0 for encryption, 1 for decryption, currently has no effect

Returns

zero on success, negative value otherwise

av_rc4_crypt()

void av_rc4_crypt	(	struct AVRC4 *	d,
		uint8_t *	dst,
		const uint8_t *	src,
		int	count,
		uint8_t *	iv,
		int	decrypt
	)

Encrypts / decrypts using the RC4 algorithm.

Parameters

d	pointer to the AVRC4 context
count	number of bytes
dst	destination array, can be equal to src
src	source array, can be equal to dst, may be NULL
iv	not (yet) used for RC4, should be NULL
decrypt	0 for encryption, 1 for decryption, not (yet) used