mirror of
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439 lines
17 KiB
C
439 lines
17 KiB
C
/*
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* Copyright 2014-2026 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#ifndef GMSSL_XMSS_H
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#define GMSSL_XMSS_H
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <gmssl/sm3.h>
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#ifdef ENABLE_SHA2
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#include <gmssl/sha2.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef uint8_t xmss_hash256_t[32];
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// Crosscheck with data from xmss-reference (SHA-256), except the XMSS signature.
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#if defined(ENABLE_XMSS_CROSSCHECK) && defined(ENABLE_SHA2) && !defined(HASH256_CTX)
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# define XMSS_HASH256_CTX SHA256_CTX
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# define xmss_hash256_init sha256_init
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# define xmss_hash256_update sha256_update
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# define xmss_hash256_finish sha256_finish
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# define XMSS_HASH256_BLOCK_SIZE SHA256_BLOCK_SIZE
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#else
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# define XMSS_HASH256_CTX SM3_CTX
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# define xmss_hash256_init sm3_init
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# define xmss_hash256_update sm3_update
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# define xmss_hash256_finish sm3_finish
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# define XMSS_HASH256_BLOCK_SIZE SM3_BLOCK_SIZE
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#endif
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// ADRS scheme
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enum {
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XMSS_ADRS_TYPE_OTS = 0,
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XMSS_ADRS_TYPE_LTREE = 1,
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XMSS_ADRS_TYPE_HASHTREE = 2,
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};
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enum {
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XMSS_ADRS_GENERATE_KEY = 0,
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XMSS_ADRS_GENERATE_BITMASK = 1,
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};
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typedef struct {
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uint32_t layer_address; // layer index of multi-tree, 0 for lowest layer (and xmss, and OTS ADRS)
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uint64_t tree_address; // tree index of a layer, 0 for the left most (and xmss), in [0, 2^(h*(layers-1))-1]
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uint32_t type; // = XMSS_ADRS_TYPE_OTS
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uint32_t ots_address; // index of a leaf (wots+ public key) of a layer-0 xmss tree, in [0, 2^h-1]
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uint32_t chain_address; // index of wots+ chain, in [0, 67) when w = 16
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uint32_t hash_address; // index of hash calls in a wots+ chain, in [0, w-1]
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uint32_t key_and_mask; // in { XMSS_ADRS_GENERATE_KEY, XMSS_ADRS_GENERATE_BITMASK }
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} XMSS_ADRS_OTS;
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typedef struct {
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uint32_t layer_address;
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uint64_t tree_address;
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uint32_t type; // = XMSS_ADRS_TYPE_LTREE
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uint32_t ltree_address;
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uint32_t tree_height;
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uint32_t tree_index;
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uint32_t key_and_mask;
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} XMSS_ADRS_LTREE;
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typedef struct {
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uint32_t layer_address;
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uint64_t tree_address;
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uint32_t type; // = XMSS_ADRS_TYPE_HASHTREE
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uint32_t padding; // = 0
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uint32_t tree_height;
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uint32_t tree_index;
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uint32_t key_and_mask;
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} XMSS_ADRS_HASHTREE;
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typedef uint8_t xmss_adrs_t[32];
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void xmss_adrs_copy_layer_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_tree_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_type(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_ots_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_ltree_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_padding(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_chain_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_tree_height(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_hash_address(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_tree_index(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_copy_key_and_mask(xmss_adrs_t dst, const xmss_adrs_t src);
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void xmss_adrs_set_layer_address(xmss_adrs_t adrs, uint32_t layer);
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void xmss_adrs_set_tree_address(xmss_adrs_t adrs, uint64_t tree_addr);
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void xmss_adrs_set_type(xmss_adrs_t adrs, uint32_t type);
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void xmss_adrs_set_ots_address(xmss_adrs_t adrs, uint32_t address);
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void xmss_adrs_set_ltree_address(xmss_adrs_t adrs, uint32_t address);
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void xmss_adrs_set_padding(xmss_adrs_t adrs, uint32_t padding);
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void xmss_adrs_set_chain_address(xmss_adrs_t adrs, uint32_t address);
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void xmss_adrs_set_tree_height(xmss_adrs_t adrs, uint32_t height);
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void xmss_adrs_set_hash_address(xmss_adrs_t adrs, uint32_t address);
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void xmss_adrs_set_tree_index(xmss_adrs_t adrs, uint32_t index);
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void xmss_adrs_set_key_and_mask(xmss_adrs_t adrs, uint32_t key_and_mask);
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int xmss_adrs_print(FILE *fp, int fmt, int ind, const char *label, const xmss_hash256_t adrs);
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// WOTS+ with SM3/SHA256
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#define XMSS_WOTS_WINTERNITZ_W 16 // rfc 8391 named algors only support w = 2^4 = 16
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#define XMSS_WOTS_NUM_CHAINS 67
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typedef xmss_hash256_t xmss_wots_key_t[XMSS_WOTS_NUM_CHAINS];
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typedef xmss_hash256_t xmss_wots_sig_t[XMSS_WOTS_NUM_CHAINS];
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void xmss_wots_derive_sk(const xmss_hash256_t secret,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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xmss_wots_key_t sk);
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void xmss_wots_chain(const xmss_hash256_t x,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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int start, int steps, xmss_hash256_t y);
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void xmss_wots_sk_to_pk(const xmss_wots_key_t sk,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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xmss_wots_key_t pk);
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void xmss_wots_sign(const xmss_wots_key_t sk,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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const xmss_hash256_t dgst, xmss_wots_sig_t sig);
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void xmss_wots_sig_to_pk(const xmss_wots_sig_t sig,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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const xmss_hash256_t dgst, xmss_wots_key_t pk);
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void xmss_wots_pk_to_root(const xmss_wots_key_t pk,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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xmss_hash256_t wots_root);
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void xmss_wots_derive_root(const xmss_hash256_t secret,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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xmss_hash256_t wots_root);
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int xmss_wots_verify(const xmss_hash256_t wots_root,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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const xmss_hash256_t dgst, const xmss_wots_sig_t sig);
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// from RFC 8391 table 7
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enum {
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XMSS_SHA2_10_256 = 0x00000001,
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XMSS_SHA2_16_256 = 0x00000002,
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XMSS_SHA2_20_256 = 0x00000003,
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};
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enum {
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XMSS_SM3_10_256 = 0x10000001, // height = 10, sigs = 2^10
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XMSS_SM3_16_256 = 0x10000002, // height = 16, sigs = 2^16
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XMSS_SM3_20_256 = 0x10000003, // height = 20, sigs = 2^20
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};
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#define XMSS_MAX_HEIGHT 20
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// Crosscheck with data from xmss-reference (SHA-256), except the XMSS signature.
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#if defined(ENABLE_XMSS_CROSSCHECK) && defined(ENABLE_SHA2)
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# define XMSS_HASH256_10_256 XMSS_SHA2_10_256
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# define XMSS_HASH256_16_256 XMSS_SHA2_16_256
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# define XMSS_HASH256_20_256 XMSS_SHA2_20_256
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# define XMSS_HASH256_10_256_NAME "XMSS_SHA2_10_256"
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# define XMSS_HASH256_16_256_NAME "XMSS_SHA2_16_256"
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# define XMSS_HASH256_20_256_NAME "XMSS_SHA2_20_256"
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#else
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# define XMSS_HASH256_10_256 XMSS_SM3_10_256
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# define XMSS_HASH256_16_256 XMSS_SM3_16_256
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# define XMSS_HASH256_20_256 XMSS_SM3_20_256
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# define XMSS_HASH256_10_256_NAME "XMSS_SM3_10_256"
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# define XMSS_HASH256_16_256_NAME "XMSS_SM3_16_256"
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# define XMSS_HASH256_20_256_NAME "XMSS_SM3_20_256"
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#endif
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char *xmss_type_name(uint32_t xmss_type);
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uint32_t xmss_type_from_name(const char *name);
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int xmss_type_to_height(uint32_t xmss_type, size_t *height);
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size_t xmss_num_tree_nodes(size_t height);
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void xmss_build_tree(const xmss_hash256_t secret,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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size_t height, xmss_hash256_t *tree); // tree[xmss_num_tree_nodes(height)]
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void xmss_build_auth_path(const xmss_hash256_t *tree, size_t height,
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uint32_t index, xmss_hash256_t *auth_path); // auth_path[height]
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void xmss_build_root(const xmss_hash256_t wots_root, uint32_t index,
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const xmss_hash256_t seed, const xmss_adrs_t adrs,
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const xmss_hash256_t *auth_path, size_t height,
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xmss_hash256_t xmss_root);
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typedef struct {
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uint32_t xmss_type;
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xmss_hash256_t seed;
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xmss_hash256_t root;
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} XMSS_PUBLIC_KEY;
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#define XMSS_PUBLIC_KEY_SIZE (4 + 32 + 32) // = 68
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typedef struct XMSS_KEY_st XMSS_KEY;
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typedef int (*xmss_key_update_callback)(XMSS_KEY *key);
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typedef struct XMSS_KEY_st {
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XMSS_PUBLIC_KEY public_key;
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uint32_t index;
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xmss_hash256_t secret;
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xmss_hash256_t sk_prf;
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xmss_hash256_t *tree; // xmss_hash256_t[2^(h + 1) - 1]
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xmss_key_update_callback update_callback;
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void *update_param;
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} XMSS_KEY;
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// XMSS_SHA2_10_256: 65,640
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// XMSS_SHA2_16_256: 4,194,408
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// XMSS_SHA2_20_256: 67,108,968
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int xmss_private_key_size(uint32_t xmss_type, size_t *keysize);
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//#define XMSS_PRIVATE_KEY_SIZE (XMSS_PUBLIC_KEY_SIZE + 32 + 32 + 4) // = 136
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int xmss_key_generate(XMSS_KEY *key, uint32_t xmss_type);
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int xmss_key_remaining_signs(const XMSS_KEY *key, size_t *count);
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int xmss_key_set_update_callback(XMSS_KEY *key, xmss_key_update_callback update_cb, void *param);
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int xmss_key_update(XMSS_KEY *key);
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void xmss_key_cleanup(XMSS_KEY *key);
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int xmss_public_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen);
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int xmss_public_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen);
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int xmss_public_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSS_KEY *key);
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int xmss_private_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen);
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int xmss_private_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen);
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int xmss_private_key_from_file(XMSS_KEY *key, FILE *fp);
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int xmss_private_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSS_KEY *key);
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typedef struct {
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uint32_t index; // < 2^(XMSS_MAX_HEIGHT) = 2^20, always encode to 4 bytes
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xmss_hash256_t random;
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xmss_wots_sig_t wots_sig;
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xmss_hash256_t auth_path[XMSS_MAX_HEIGHT];
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} XMSS_SIGNATURE;
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// XMSS_SM3_10_256 2500 bytes
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// XMSS_SM3_16_256 2692 bytes
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// XMSS_SM3_20_256 2820 bytes
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#define XMSS_SIGNATURE_MIN_SIZE (4 + 32 + 32*67 + 32 * XMSS_MIN_HEIGHT) // = 2500 bytes
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#define XMSS_SIGNATURE_MAX_SIZE (4 + 32 + 32*67 + 32 * XMSS_MAX_HEIGHT) // = 2820 bytes
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int xmss_signature_size(uint32_t xmss_type, size_t *siglen);
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int xmss_key_get_signature_size(const XMSS_KEY *key, size_t *siglen);
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int xmss_signature_to_bytes(const XMSS_SIGNATURE *sig, uint32_t xmss_type, uint8_t **out, size_t *outlen);
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int xmss_signature_from_bytes(XMSS_SIGNATURE *sig, uint32_t xmss_type, const uint8_t **in, size_t *inlen);
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int xmss_signature_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *in, size_t inlen);
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int xmss_signature_print_ex(FILE *fp, int fmt, int ind, const char *label, const XMSS_SIGNATURE *sig);
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typedef struct {
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XMSS_PUBLIC_KEY xmss_public_key;
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XMSS_SIGNATURE xmss_sig;
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XMSS_HASH256_CTX hash256_ctx;
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} XMSS_SIGN_CTX;
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int xmss_sign_init(XMSS_SIGN_CTX *ctx, XMSS_KEY *key);
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int xmss_sign_update(XMSS_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int xmss_sign_finish(XMSS_SIGN_CTX *ctx, uint8_t *sigbuf, size_t *siglen);
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int xmss_verify_init(XMSS_SIGN_CTX *ctx, const XMSS_KEY *key, const uint8_t *sigbuf, size_t siglen);
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int xmss_verify_update(XMSS_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int xmss_verify_finish(XMSS_SIGN_CTX *ctx);
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void xmss_sign_ctx_cleanup(XMSS_SIGN_CTX *ctx);
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enum {
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XMSSMT_SM3_20_2_256 = 0x00000001,
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XMSSMT_SM3_20_4_256 = 0x00000002,
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XMSSMT_SM3_40_2_256 = 0x00000003,
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XMSSMT_SM3_40_4_256 = 0x00000004,
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XMSSMT_SM3_40_8_256 = 0x00000005,
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XMSSMT_SM3_60_3_256 = 0x00000006,
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XMSSMT_SM3_60_6_256 = 0x00000007,
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XMSSMT_SM3_60_12_256 = 0x00000008,
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};
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// from rfc 8391 table 8
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enum {
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XMSSMT_RESERVED = 0x00000000,
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XMSSMT_SHA2_20_2_256 = 0x00000001,
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XMSSMT_SHA2_20_4_256 = 0x00000002,
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XMSSMT_SHA2_40_2_256 = 0x00000003,
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XMSSMT_SHA2_40_4_256 = 0x00000004,
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XMSSMT_SHA2_40_8_256 = 0x00000005,
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XMSSMT_SHA2_60_3_256 = 0x00000006,
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XMSSMT_SHA2_60_6_256 = 0x00000007,
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XMSSMT_SHA2_60_12_256 = 0x00000008,
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};
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#if defined(ENABLE_XMSS_CROSSCHECK) && defined(ENABLE_SHA2)
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# define XMSSMT_HASH256_20_2_256 XMSSMT_SHA2_20_2_256
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# define XMSSMT_HASH256_20_4_256 XMSSMT_SHA2_20_4_256
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# define XMSSMT_HASH256_40_2_256 XMSSMT_SHA2_40_2_256
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# define XMSSMT_HASH256_40_4_256 XMSSMT_SHA2_40_4_256
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# define XMSSMT_HASH256_40_8_256 XMSSMT_SHA2_40_8_256
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# define XMSSMT_HASH256_60_3_256 XMSSMT_SHA2_60_3_256
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# define XMSSMT_HASH256_60_6_256 XMSSMT_SHA2_60_6_256
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# define XMSSMT_HASH256_60_12_256 XMSSMT_SHA2_60_12_256
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# define XMSSMT_HASH256_20_2_256_NAME "XMSSMT_SHA2_20_2_256"
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# define XMSSMT_HASH256_20_4_256_NAME "XMSSMT_SHA2_20_4_256"
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# define XMSSMT_HASH256_40_2_256_NAME "XMSSMT_SHA2_40_2_256"
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# define XMSSMT_HASH256_40_4_256_NAME "XMSSMT_SHA2_40_4_256"
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# define XMSSMT_HASH256_40_8_256_NAME "XMSSMT_SHA2_40_8_256"
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# define XMSSMT_HASH256_60_3_256_NAME "XMSSMT_SHA2_60_3_256"
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# define XMSSMT_HASH256_60_6_256_NAME "XMSSMT_SHA2_60_6_256"
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# define XMSSMT_HASH256_60_12_256_NAME "XMSSMT_SHA2_60_12_256"
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#else
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# define XMSSMT_HASH256_20_2_256 XMSSMT_SM3_20_2_256
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# define XMSSMT_HASH256_20_4_256 XMSSMT_SM3_20_4_256
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# define XMSSMT_HASH256_40_2_256 XMSSMT_SM3_40_2_256
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# define XMSSMT_HASH256_40_4_256 XMSSMT_SM3_40_4_256
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# define XMSSMT_HASH256_40_8_256 XMSSMT_SM3_40_8_256
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# define XMSSMT_HASH256_60_3_256 XMSSMT_SM3_60_3_256
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# define XMSSMT_HASH256_60_6_256 XMSSMT_SM3_60_6_256
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# define XMSSMT_HASH256_60_12_256 XMSSMT_SM3_60_12_256
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# define XMSSMT_HASH256_20_2_256_NAME "XMSSMT_SM3_20_2_256"
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# define XMSSMT_HASH256_20_4_256_NAME "XMSSMT_SM3_20_4_256"
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# define XMSSMT_HASH256_40_2_256_NAME "XMSSMT_SM3_40_2_256"
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# define XMSSMT_HASH256_40_4_256_NAME "XMSSMT_SM3_40_4_256"
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# define XMSSMT_HASH256_40_8_256_NAME "XMSSMT_SM3_40_8_256"
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# define XMSSMT_HASH256_60_3_256_NAME "XMSSMT_SM3_60_3_256"
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# define XMSSMT_HASH256_60_6_256_NAME "XMSSMT_SM3_60_6_256"
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# define XMSSMT_HASH256_60_12_256_NAME "XMSSMT_SM3_60_12_256"
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#endif
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char *xmssmt_type_name(uint32_t xmssmt_type);
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uint32_t xmssmt_type_from_name(const char *name);
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#define XMSSMT_MAX_HEIGHT 60
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#define XMSSMT_MAX_LAYERS 12
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int xmssmt_type_to_height_and_layers(uint32_t xmssmt_type, size_t *height, size_t *layers);
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size_t xmssmt_num_trees_nodes(size_t height, size_t layers);
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typedef struct {
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uint32_t xmssmt_type;
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xmss_hash256_t seed;
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xmss_hash256_t root;
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} XMSSMT_PUBLIC_KEY;
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#define XMSSMT_PUBLIC_KEY_SIZE (4 + sizeof(xmss_hash256_t) + sizeof(xmss_hash256_t)) // = 68 bytes
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typedef struct XMSSMT_KEY_st XMSSMT_KEY;
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typedef int (*xmssmt_key_update_callback)(XMSSMT_KEY *key);
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typedef struct XMSSMT_KEY_st {
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XMSSMT_PUBLIC_KEY public_key;
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uint64_t index; // in [0, 2^60 - 1]
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xmss_hash256_t secret;
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xmss_hash256_t sk_prf;
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xmss_hash256_t *trees;
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xmss_wots_sig_t wots_sigs[XMSSMT_MAX_LAYERS - 1];
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xmssmt_key_update_callback update_callback;
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void *update_param;
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} XMSSMT_KEY;
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/*
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XMSSMT_SM3_20_2_256: 133,287 bytes
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XMSSMT_SM3_20_4_256: 14,631 bytes
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XMSSMT_SM3_40_2_256: 134,219,945 bytes
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XMSSMT_SM3_40_4_256: 268,585 bytes
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XMSSMT_SM3_40_8_256: 31,273 bytes
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XMSSMT_SM3_60_3_256: 201,330,924 bytes
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XMSSMT_SM3_60_6_256: 403,884 bytes
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XMSSMT_SM3_60_12_256: 47,916 bytes
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*/
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int xmssmt_private_key_size(uint32_t xmssmt_type, size_t *len);
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int xmssmt_build_auth_path(const xmss_hash256_t *tree, size_t height, size_t layers, uint64_t index, xmss_hash256_t *auth_path);
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int xmssmt_key_generate(XMSSMT_KEY *key, uint32_t xmssmt_type);
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int xmssmt_key_set_update_callback(XMSSMT_KEY *key, xmssmt_key_update_callback update_cb, void *param);
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int xmssmt_key_update(XMSSMT_KEY *key);
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int xmssmt_public_key_to_bytes(const XMSSMT_KEY *key, uint8_t **out, size_t *outlen);
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int xmssmt_public_key_from_bytes(XMSSMT_KEY *key, const uint8_t **in, size_t *inlen);
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int xmssmt_public_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSSMT_KEY *key);
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int xmssmt_private_key_to_bytes(const XMSSMT_KEY *key, uint8_t **out, size_t *outlen);
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int xmssmt_private_key_from_bytes(XMSSMT_KEY *key, const uint8_t **in, size_t *inlen);
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int xmssmt_private_key_from_file(XMSSMT_KEY *key, FILE *fp);
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int xmssmt_private_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSSMT_KEY *key);
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void xmssmt_key_cleanup(XMSSMT_KEY *key);
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typedef struct {
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uint64_t index;
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xmss_hash256_t random;
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xmss_wots_sig_t wots_sigs[XMSSMT_MAX_LAYERS];
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xmss_hash256_t auth_path[XMSSMT_MAX_HEIGHT];
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} XMSSMT_SIGNATURE;
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int xmssmt_index_to_bytes(uint64_t index, uint32_t xmssmt_type, uint8_t **out, size_t *outlen);
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int xmssmt_index_from_bytes(uint64_t *index, uint32_t xmssmt_type, const uint8_t **in, size_t *inlen);
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#define XMSSMT_SIGNATURE_MAX_SIZE sizeof(XMSSMT_SIGNATURE) // >= 27688 bytes
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int xmssmt_key_get_signature_size(const XMSSMT_KEY *key, size_t *siglen);
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int xmssmt_signature_size(uint32_t xmssmt_type, size_t *siglen);
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int xmssmt_signature_to_bytes(const XMSSMT_SIGNATURE *sig, uint32_t xmssmt_type, uint8_t **out, size_t *outlen);
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int xmssmt_signature_from_bytes(XMSSMT_SIGNATURE *sig, uint32_t xmssmt_type, const uint8_t **in, size_t *inlen);
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int xmssmt_signature_print_ex(FILE *fp, int fmt, int ind, const char *label, const XMSSMT_SIGNATURE *sig, uint32_t xmssmt_type);
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int xmssmt_signature_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *sig, size_t siglen, uint32_t xmssmt_type);
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typedef struct {
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XMSSMT_PUBLIC_KEY xmssmt_public_key;
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XMSSMT_SIGNATURE xmssmt_sig;
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XMSS_HASH256_CTX hash256_ctx;
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} XMSSMT_SIGN_CTX;
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int xmssmt_sign_init(XMSSMT_SIGN_CTX *ctx, XMSSMT_KEY *key);
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int xmssmt_sign_update(XMSSMT_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int xmssmt_sign_finish(XMSSMT_SIGN_CTX *ctx, uint8_t *sig, size_t *siglen);
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int xmssmt_sign_finish_ex(XMSSMT_SIGN_CTX *ctx, XMSSMT_SIGNATURE *sig);
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int xmssmt_verify_init_ex(XMSSMT_SIGN_CTX *ctx, const XMSSMT_KEY *key, const XMSSMT_SIGNATURE *sig);
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int xmssmt_verify_init(XMSSMT_SIGN_CTX *ctx, const XMSSMT_KEY *key, const uint8_t *sig, size_t siglen);
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int xmssmt_verify_update(XMSSMT_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int xmssmt_verify_finish(XMSSMT_SIGN_CTX *ctx);
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void xmssmt_sign_ctx_cleanup(XMSSMT_SIGN_CTX *ctx);
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#ifdef __cplusplus
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}
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#endif
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#endif
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