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112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
#ifdef WITH_XMSS
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/* $OpenBSD: xmss_fast.h,v 1.2 2018/02/26 03:56:44 dtucker Exp $ */
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/*
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xmss_fast.h version 20160722
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Andreas Hülsing
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Joost Rijneveld
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Public domain.
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*/
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#include "xmss_wots.h"
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#ifndef XMSS_H
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#define XMSS_H
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typedef struct{
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unsigned int level;
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unsigned long long subtree;
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unsigned int subleaf;
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} leafaddr;
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typedef struct{
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wots_params wots_par;
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unsigned int n;
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unsigned int h;
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unsigned int k;
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} xmss_params;
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typedef struct{
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xmss_params xmss_par;
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unsigned int n;
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unsigned int h;
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unsigned int d;
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unsigned int index_len;
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} xmssmt_params;
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typedef struct{
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unsigned int h;
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unsigned int next_idx;
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unsigned int stackusage;
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unsigned char completed;
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unsigned char *node;
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} treehash_inst;
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typedef struct {
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unsigned char *stack;
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unsigned int stackoffset;
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unsigned char *stacklevels;
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unsigned char *auth;
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unsigned char *keep;
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treehash_inst *treehash;
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unsigned char *retain;
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unsigned int next_leaf;
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} bds_state;
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/**
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* Initialize BDS state struct
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* parameter names are the same as used in the description of the BDS traversal
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*/
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void xmss_set_bds_state(bds_state *state, unsigned char *stack, int stackoffset, unsigned char *stacklevels, unsigned char *auth, unsigned char *keep, treehash_inst *treehash, unsigned char *retain, int next_leaf);
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/**
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* Initializes parameter set.
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* Needed, for any of the other methods.
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*/
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int xmss_set_params(xmss_params *params, int n, int h, int w, int k);
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/**
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* Initialize xmssmt_params struct
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* parameter names are the same as in the draft
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*
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* Especially h is the total tree height, i.e. the XMSS trees have height h/d
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*/
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int xmssmt_set_params(xmssmt_params *params, int n, int h, int d, int w, int k);
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/**
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* Generates a XMSS key pair for a given parameter set.
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* Format sk: [(32bit) idx || SK_SEED || SK_PRF || PUB_SEED || root]
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* Format pk: [root || PUB_SEED] omitting algo oid.
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*/
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int xmss_keypair(unsigned char *pk, unsigned char *sk, bds_state *state, xmss_params *params);
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/**
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* Signs a message.
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* Returns
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* 1. an array containing the signature followed by the message AND
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* 2. an updated secret key!
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*
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*/
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int xmss_sign(unsigned char *sk, bds_state *state, unsigned char *sig_msg, unsigned long long *sig_msg_len, const unsigned char *msg,unsigned long long msglen, const xmss_params *params);
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/**
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* Verifies a given message signature pair under a given public key.
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*
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* Note: msg and msglen are pure outputs which carry the message in case verification succeeds. The (input) message is assumed to be within sig_msg which has the form (sig||msg).
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*/
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int xmss_sign_open(unsigned char *msg,unsigned long long *msglen, const unsigned char *sig_msg,unsigned long long sig_msg_len, const unsigned char *pk, const xmss_params *params);
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/*
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* Generates a XMSSMT key pair for a given parameter set.
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* Format sk: [(ceil(h/8) bit) idx || SK_SEED || SK_PRF || PUB_SEED || root]
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* Format pk: [root || PUB_SEED] omitting algo oid.
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*/
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int xmssmt_keypair(unsigned char *pk, unsigned char *sk, bds_state *states, unsigned char *wots_sigs, xmssmt_params *params);
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/**
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* Signs a message.
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* Returns
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* 1. an array containing the signature followed by the message AND
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* 2. an updated secret key!
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*
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*/
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int xmssmt_sign(unsigned char *sk, bds_state *state, unsigned char *wots_sigs, unsigned char *sig_msg, unsigned long long *sig_msg_len, const unsigned char *msg, unsigned long long msglen, const xmssmt_params *params);
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/**
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* Verifies a given message signature pair under a given public key.
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*/
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int xmssmt_sign_open(unsigned char *msg, unsigned long long *msglen, const unsigned char *sig_msg, unsigned long long sig_msg_len, const unsigned char *pk, const xmssmt_params *params);
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#endif
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#endif /* WITH_XMSS */
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