poly1305

Poly1305 one-time message authentication code. More...

Detailed Description

Poly1305 one-time message authentication code.

Poly1305 is a one-time authenticator designed by D.J. Bernstein. It uses a 32-byte one-time key and a message and produces a 16-byte tag.

Files
file	poly1305.h
	Poly1305 MAC interface.

Data Structures
struct	poly1305_ctx_t
	Poly1305 context. More...

Macros
#define	POLY1305_BLOCK_SIZE   16
	Poly1305 block size.

Functions
void	poly1305_init (poly1305_ctx_t *ctx, const uint8_t *key)
	Initialize a poly1305 context.
void	poly1305_update (poly1305_ctx_t *ctx, const uint8_t *data, size_t len)
	Update the poly1305 context with a block of message.
void	poly1305_finish (poly1305_ctx_t *ctx, uint8_t *mac)
	Finish the poly1305 operation.
void	poly1305_auth (uint8_t *mac, const uint8_t *data, size_t len, const uint8_t *key)
	Calculate a single poly1305 tag.

Macro Definition Documentation

POLY1305_BLOCK_SIZE

#define POLY1305_BLOCK_SIZE   16

Poly1305 block size.

Definition at line 41 of file poly1305.h.

Function Documentation

poly1305_auth()

void poly1305_auth	(	uint8_t *	mac,
		const uint8_t *	data,
		size_t	len,
		const uint8_t *	key )

Calculate a single poly1305 tag.

Parameters

mac	16 byte buffer for the tag
data	ptr to the message
len	length of the message
key	32 byte key

poly1305_finish()

void poly1305_finish	(	poly1305_ctx_t *	ctx,
		uint8_t *	mac )

Finish the poly1305 operation.

Parameters

ctx	poly1305 context
mac	16 byte buffer for the tag

poly1305_init()

void poly1305_init	(	poly1305_ctx_t *	ctx,
		const uint8_t *	key )

Initialize a poly1305 context.

Parameters

ctx	Poly1305 context
key	32 byte key

poly1305_update()

void poly1305_update	(	poly1305_ctx_t *	ctx,
		const uint8_t *	data,
		size_t	len )

Update the poly1305 context with a block of message.

Parameters

ctx	poly1305 context
data	ptr to the message
len	length of the message