slh_param.h

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

//	=== Internal parameter definition structure.

#ifndef _SLH_PARAM_H_
#define _SLH_PARAM_H_

#include "plat_local.h"

//	address

typedef union {
	uint8_t u8[32];
	uint32_t u32[8];
} adrs_t;

//	Parameter sets
typedef struct slh_param_s	slh_param_t;
typedef struct slh_ctx_s	slh_ctx_t;

struct slh_param_s {
	const char	*alg_id;	//	Algorithm name

	//	core parameters
	uint32_t	n;			//	Security level / hash size { 16,24,32 }.
	uint32_t	h;			//	Bits h used to select FORS key.
	uint32_t	d;			//	Number of hypertree layers d.
	uint32_t	hp;			//	Merkle tree height h' (XMSS).
	uint32_t	a;			//	String length t = 2**a (FORS).
	uint32_t	k;			//	Number of strings (FORS).
	uint32_t	lg_w;		//	Number of bits in chain index (WOTS+)
	uint32_t	m;			//	Length in bytes of message digest.

	//	hash function instantation
	void (*mk_ctx)(slh_ctx_t *ctx,	const uint8_t *pk, const uint8_t *sk,
									const slh_param_t *prm);
	void (*chain)(slh_ctx_t *ctx,	uint8_t *tmp, const uint8_t *x,
									uint32_t i, uint32_t s);
	void (*wots_chain)(slh_ctx_t *ctx,	uint8_t *tmp, uint32_t s);
	void (*fors_hash)(slh_ctx_t *ctx,	uint8_t *tmp, uint32_t s);
	void (*h_msg)(slh_ctx_t *ctx,	uint8_t *h, const uint8_t *r,
									const uint8_t *m, size_t m_sz);
	void (*prf)(slh_ctx_t *ctx,		uint8_t *h);
	void (*prf_msg)(slh_ctx_t *ctx, uint8_t *h, const uint8_t *opt_rand,
									const uint8_t *m, size_t m_sz);
	void (*h_f)(slh_ctx_t *ctx, uint8_t *h, const uint8_t *m1);
	void (*h_h)(slh_ctx_t *ctx, uint8_t *h,
								const uint8_t *m1, const uint8_t *m2);
	void (*h_t)(slh_ctx_t *ctx, uint8_t *h,
								const uint8_t *m, size_t m_sz);
};

//	_SLH_PARAM_H_
#endif