2 /* $OpenBSD: xmss_fast.h,v 1.2 2018/02/26 03:56:44 dtucker Exp $ */
4 xmss_fast.h version 20160722
10 #include "xmss_wots.h"
16 unsigned long long subtree;
32 unsigned int index_len;
37 unsigned int next_idx;
38 unsigned int stackusage;
39 unsigned char completed;
45 unsigned int stackoffset;
46 unsigned char *stacklevels;
49 treehash_inst *treehash;
50 unsigned char *retain;
51 unsigned int next_leaf;
55 * Initialize BDS state struct
56 * parameter names are the same as used in the description of the BDS traversal
58 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);
60 * Initializes parameter set.
61 * Needed, for any of the other methods.
63 int xmss_set_params(xmss_params *params, int n, int h, int w, int k);
65 * Initialize xmssmt_params struct
66 * parameter names are the same as in the draft
68 * Especially h is the total tree height, i.e. the XMSS trees have height h/d
70 int xmssmt_set_params(xmssmt_params *params, int n, int h, int d, int w, int k);
72 * Generates a XMSS key pair for a given parameter set.
73 * Format sk: [(32bit) idx || SK_SEED || SK_PRF || PUB_SEED || root]
74 * Format pk: [root || PUB_SEED] omitting algo oid.
76 int xmss_keypair(unsigned char *pk, unsigned char *sk, bds_state *state, xmss_params *params);
80 * 1. an array containing the signature followed by the message AND
81 * 2. an updated secret key!
84 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);
86 * Verifies a given message signature pair under a given public key.
88 * 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).
90 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);
93 * Generates a XMSSMT key pair for a given parameter set.
94 * Format sk: [(ceil(h/8) bit) idx || SK_SEED || SK_PRF || PUB_SEED || root]
95 * Format pk: [root || PUB_SEED] omitting algo oid.
97 int xmssmt_keypair(unsigned char *pk, unsigned char *sk, bds_state *states, unsigned char *wots_sigs, xmssmt_params *params);
101 * 1. an array containing the signature followed by the message AND
102 * 2. an updated secret key!
105 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);
107 * Verifies a given message signature pair under a given public key.
109 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);
111 #endif /* WITH_XMSS */