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 @paran 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

extern