lc_hash.h File Reference

#include "ext_headers.h"
#include "lc_memset_secure.h"
#include "lc_memory_support.h"

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Macros
#define	LC_HASH_CTX_ON_STACK(name, hashname)
	Allocate stack memory for the hash context.

Functions
static void	lc_hash_init (struct lc_hash_ctx *hash_ctx)
	Initialize hash context.
static void	lc_hash_update (struct lc_hash_ctx *hash_ctx, const uint8_t *in, size_t inlen)
	Update hash.
static void	lc_hash_final (struct lc_hash_ctx *hash_ctx, uint8_t *digest)
	Calculate message digest.
static void	lc_hash_set_digestsize (struct lc_hash_ctx *hash_ctx, size_t digestsize)
	Set the size of the message digest - this call is intended for SHAKE.
static size_t	lc_hash_digestsize (struct lc_hash_ctx *hash_ctx)
	Get the size of the message digest.
static unsigned int	lc_hash_blocksize (struct lc_hash_ctx *hash_ctx)
	Get the block size of the message digest (or the "rate" in terms of Sponge-based algorithms)
static unsigned int	lc_hash_ctxsize (struct lc_hash_ctx *hash_ctx)
	Get the context size of the message digest implementation.
static void	lc_hash_zero (struct lc_hash_ctx *hash_ctx)
	Zeroize Hash context allocated with either LC_HASH_CTX_ON_STACK or lc_hmac_alloc.
int	lc_hash_alloc (const struct lc_hash *hash, struct lc_hash_ctx **hash_ctx)
	Allocate Hash context on heap.
void	lc_hash_zero_free (struct lc_hash_ctx *hash_ctx)
	Zeroize and free hash context.
void	lc_hash (const struct lc_hash *hash, const uint8_t *in, size_t inlen, uint8_t *digest)
	Calculate message digest - one-shot.
void	lc_xof (const struct lc_hash *xof, const uint8_t *in, size_t inlen, uint8_t *digest, size_t digestlen)
	Calculate message digest for an XOF - one-shot.
static int	lc_sponge (const struct lc_hash *hash, void *state, unsigned int rounds)
	Perform Sponge permutation on buffer.
static int	lc_sponge_add_bytes (const struct lc_hash *hash, void *state, const uint8_t *data, size_t offset, size_t length)
	Function to add (in GF(2), using bitwise exclusive-or) data given as bytes into the sponge state.
static int	lc_sponge_extract_bytes (const struct lc_hash *hash, const void *state, uint8_t *data, size_t offset, size_t length)
	Function to retrieve data from the state. The bit positions that are retrieved by this function are from offset*8 to offset*8 + length*8.
static int	lc_sponge_newstate (const struct lc_hash *hash, void *state, const uint8_t *data, size_t offset, size_t length)
	Function to insert a complete new sponge state.