usual/crypto/keccak.h File Reference

Simple API to Keccak1600 permutation + sponge. More...

Data Structures
struct	KeccakContext
	Keccak state structure for all modes. More...
Functions
int	keccak_init (struct KeccakContext *ctx, unsigned int capacity)
	Set up state with specified capacity.
void	keccak_absorb (struct KeccakContext *ctx, const void *data, size_t len)
	Hash additional data.
void	keccak_squeeze (struct KeccakContext *ctx, uint8_t *dst, size_t len)
	Extract bytes from state.
void	keccak_squeeze_xor (struct KeccakContext *ctx, uint8_t *dst, const void *src, size_t len)
	Extract bytes from state, XOR into data.
void	keccak_encrypt (struct KeccakContext *ctx, uint8_t *dst, const void *src, size_t len)
	XOR data into state and return it.
void	keccak_decrypt (struct KeccakContext *ctx, uint8_t *dst, const void *src, size_t len)
	XOR state with data and return it.
void	keccak_pad (struct KeccakContext *ctx, const void *data, size_t len)
	Hash pad suffix.
void	keccak_rewind (struct KeccakContext *ctx)
	Move internal position to start of buffer.
void	keccak_forget (struct KeccakContext *ctx)
	Clear rate bits.

---

Detailed Description

Simple API to Keccak1600 permutation + sponge.

---

Function Documentation

int keccak_init	(	struct KeccakContext *	ctx,
		unsigned int	capacity
	)

Set up state with specified capacity.

Returns 1 if successful, 0 if invalid capacity.

void keccak_absorb	(	struct KeccakContext *	ctx,
		const void *	data,
		size_t	len
	)

Hash additional data.

void keccak_squeeze	(	struct KeccakContext *	ctx,
		uint8_t *	dst,
		size_t	len
	)

Extract bytes from state.

void keccak_squeeze_xor	(	struct KeccakContext *	ctx,
		uint8_t *	dst,
		const void *	src,
		size_t	len
	)

Extract bytes from state, XOR into data.

void keccak_encrypt	(	struct KeccakContext *	ctx,
		uint8_t *	dst,
		const void *	src,
		size_t	len
	)

XOR data into state and return it.

void keccak_decrypt	(	struct KeccakContext *	ctx,
		uint8_t *	dst,
		const void *	src,
		size_t	len
	)

XOR state with data and return it.

void keccak_pad	(	struct KeccakContext *	ctx,
		const void *	data,
		size_t	len
	)

Hash pad suffix.

void keccak_rewind

(

struct KeccakContext *

ctx

)

Move internal position to start of buffer.

Useful for PRNG/duplex modes.

void keccak_forget

(

struct KeccakContext *

ctx

)

Clear rate bits.