Blowfish

Data Structures
struct	AVBlowfish

Macros
#define	AV_BF_ROUNDS   16

Functions
AVBlowfish *	av_blowfish_alloc (void)
	Allocate an AVBlowfish context. More...
void	av_blowfish_init (struct AVBlowfish *ctx, const uint8_t *key, int key_len)
	Initialize an AVBlowfish context. More...
void	av_blowfish_crypt_ecb (struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr, int decrypt)
	Encrypt or decrypt a buffer using a previously initialized context. More...
void	av_blowfish_crypt (struct AVBlowfish *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...

Detailed Description

Macro Definition Documentation

AV_BF_ROUNDS

#define AV_BF_ROUNDS   16

Definition at line 33 of file blowfish.h.

Function Documentation

av_blowfish_alloc()

AVBlowfish * av_blowfish_alloc

(

void

)

Allocate an AVBlowfish context.

av_blowfish_init()

void av_blowfish_init	(	struct AVBlowfish *	ctx,
		const uint8_t *	key,
		int	key_len
	)

Initialize an AVBlowfish context.

Parameters

ctx	an AVBlowfish context
key	a key
key_len	length of the key

av_blowfish_crypt_ecb()

void av_blowfish_crypt_ecb	(	struct AVBlowfish *	ctx,
		uint32_t *	xl,
		uint32_t *	xr,
		int	decrypt
	)

Encrypt or decrypt a buffer using a previously initialized context.

Parameters

ctx	an AVBlowfish context
xl	left four bytes halves of input to be encrypted
xr	right four bytes halves of input to be encrypted
decrypt	0 for encryption, 1 for decryption

av_blowfish_crypt()

void av_blowfish_crypt	(	struct AVBlowfish *	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 AVBlowfish 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 ECB will be used
decrypt	0 for encryption, 1 for decryption