CAST5

Functions
struct AVCAST5 *	av_cast5_alloc (void)
	Allocate an AVCAST5 context To free the struct: av_free(ptr) More...
int	av_cast5_init (struct AVCAST5 *ctx, const uint8_t *key, int key_bits)
	Initialize an AVCAST5 context. More...
void	av_cast5_crypt (struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt)
	Encrypt or decrypt a buffer using a previously initialized context, ECB mode only. More...
void	av_cast5_crypt2 (struct AVCAST5 *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. More...

Variables
const int	av_cast5_size

Detailed Description

Function Documentation

av_cast5_alloc()

struct AVCAST5 * av_cast5_alloc

(

void

)

Allocate an AVCAST5 context To free the struct: av_free(ptr)

av_cast5_init()

int av_cast5_init	(	struct AVCAST5 *	ctx,
		const uint8_t *	key,
		int	key_bits
	)

Initialize an AVCAST5 context.

Parameters

ctx	an AVCAST5 context
key	a key of 5,6,...16 bytes used for encryption/decryption
key_bits	number of keybits: possible are 40,48,...,128

Returns

0 on success, less than 0 on failure

av_cast5_crypt()

void av_cast5_crypt	(	struct AVCAST5 *	ctx,
		uint8_t *	dst,
		const uint8_t *	src,
		int	count,
		int	decrypt
	)

Encrypt or decrypt a buffer using a previously initialized context, ECB mode only.

Parameters

ctx	an AVCAST5 context
dst	destination array, can be equal to src
src	source array, can be equal to dst
count	number of 8 byte blocks
decrypt	0 for encryption, 1 for decryption

av_cast5_crypt2()

void av_cast5_crypt2	(	struct AVCAST5 *	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 AVCAST5 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, NULL for ECB mode
decrypt	0 for encryption, 1 for decryption

Variable Documentation

av_cast5_size

const int av_cast5_size

extern