slh_ctx.h

//	slh_ctx.h
//	((Anonymized)).  See LICENSE.

//	=== Internal parameter definition structure.

#ifndef _SLH_CTX_H_
#define _SLH_CTX_H_

#include "slh_param.h"
#include "sha2_api.h"

//	some structural sizes
#define SLH_MAX_N	32
#define SLH_MAX_LEN (2 * SLH_MAX_N + 3)
#define SLH_MAX_K	35
#define SLH_MAX_M	49
#define SLH_MAX_HP	9
#define SLH_MAX_A	14

//	context
struct slh_ctx_s {
	const		slh_param_t *prm;
	uint8_t		sk_seed[SLH_MAX_N];
	uint8_t		sk_prf[SLH_MAX_N];
	uint8_t		pk_seed[SLH_MAX_N];
	uint8_t		pk_root[SLH_MAX_N];

#ifdef SLOTH
	volatile adrs_t *adrs;					//	hardware
#else
	adrs_t		*adrs;						//	regular pointer
#endif
	adrs_t		t_adrs;						//	local ADRS buffer

	//	precomputed values
	sha256_t	sha256_pk_seed;
	sha512_t	sha512_pk_seed;
};

//	===	Lower-level functions

//	Core signing function (of a randomized digest) with initialized context.
size_t slh_do_sign(	slh_ctx_t *ctx,
					uint8_t *sig, const uint8_t *digest);

//	_SLH_CTX_H_
#endif