TWOFISH

Functions
struct AVTWOFISH *	av_twofish_alloc (void)
	Allocate an AVTWOFISH context To free the struct: av_free(ptr) More...
int	av_twofish_init (struct AVTWOFISH *ctx, const uint8_t *key, int key_bits)
	Initialize an AVTWOFISH context. More...
void	av_twofish_crypt (struct AVTWOFISH *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_twofish_size

Detailed Description

Function Documentation

av_twofish_alloc()

struct AVTWOFISH* av_twofish_alloc

(

void

)

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

av_twofish_init()

int av_twofish_init	(	struct AVTWOFISH *	ctx,
		const uint8_t *	key,
		int	key_bits
	)

Initialize an AVTWOFISH context.

Parameters

ctx	an AVTWOFISH context
key	a key of size ranging from 1 to 32 bytes used for encryption/decryption
key_bits	number of keybits: 128, 192, 256 If less than the required, padded with zeroes to nearest valid value; return value is 0 if key_bits is 128/192/256, -1 if less than 0, 1 otherwise

av_twofish_crypt()

void av_twofish_crypt	(	struct AVTWOFISH *	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 AVTWOFISH context
dst	destination array, can be equal to src
src	source array, can be equal to dst
count	number of 16 byte blocks iv initialization vector for CBC mode, NULL for ECB mode
decrypt	0 for encryption, 1 for decryption

Variable Documentation

av_twofish_size

const int av_twofish_size