1 /* 2 * Copyright 2024-2025 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <openssl/e_os2.h> 11 12 /* 13 * PRF(), F() use this value to calculate the number of zeros 14 * H(), T() use this to calculate the number of zeros for security cat 1 15 */ 16 #define OSSL_SLH_DSA_SHA2_NUM_ZEROS_H_AND_T_BOUND1 64 17 18 /* 19 * Refer to FIPS 205 Section 11 parameter sets. 20 * lgw has been omitted since it is 4 for all algorithms i.e. log(16) 21 */ 22 typedef struct slh_dsa_params_st { 23 const char *alg; 24 int type; 25 int is_shake; 26 uint32_t n; /* Security parameter (Hash output size in bytes) (16, 24, 32) */ 27 uint32_t h; /* The total height of the tree (63, 64, 66, 68). #keypairs = 2^h */ 28 uint32_t d; /* The number of tree layers (7, 8, 17, 22) */ 29 uint32_t hm; /* The height (h') of each merkle tree. (h = hm * d ) */ 30 uint32_t a; /* Height of a FORS tree */ 31 uint32_t k; /* The number of FORS trees */ 32 uint32_t m; /* The size of H_MSG() output */ 33 uint32_t security_category; 34 uint32_t pk_len; 35 uint32_t sig_len; 36 size_t sha2_h_and_t_bound; 37 } SLH_DSA_PARAMS; 38 39 const SLH_DSA_PARAMS *ossl_slh_dsa_params_get(const char *alg); 40