usual/crypto/keccak_prng.h File Reference

Implements PRNG mode for Keccak sponge function. More...

Data Structures
struct	KeccakPRNG
	State structure. More...
Functions
bool	keccak_prng_init (struct KeccakPRNG *prng, int capacity)
	Setup Keccak with specified capacity.
void	keccak_prng_add_data (struct KeccakPRNG *prng, const void *data, size_t len)
	Merge entropy data into state.
bool	keccak_prng_extract (struct KeccakPRNG *prng, void *data, size_t len)
	Extract PRNG bytes from state.

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Detailed Description

Implements PRNG mode for Keccak sponge function.

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Function Documentation

bool keccak_prng_init	(	struct KeccakPRNG *	prng,
		int	capacity
	)

Setup Keccak with specified capacity.

Parameters:

prng	State structure to be initialized.
capacity	Keccak capacity in bits.

Returns:

False if invalid capacity, true otherwise.

void keccak_prng_add_data	(	struct KeccakPRNG *	prng,
		const void *	data,
		size_t	len
	)

Merge entropy data into state.

bool keccak_prng_extract	(	struct KeccakPRNG *	prng,
		void *	data,
		size_t	len
	)

Extract PRNG bytes from state.

Returns:

True, if extraction was successful. False if state has not been initialzed with keccak_prng_add_data().