1/* 2 * Copyright (c) 2022-2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15#ifndef __HVB_RSA_H__ 16#define __HVB_RSA_H__ 17 18#include <stdint.h> 19 20struct long_int_num { 21 unsigned long *p_uint; 22 unsigned long *data_mem; 23 uint32_t mem_size; 24 uint32_t valid_word_len; 25}; 26 27struct long_int_num *lin_create(uint32_t word_len); 28void lin_free(struct long_int_num *p_long_int); 29void lin_update_valid_len(struct long_int_num *p_a); 30uint32_t lin_get_bitlen(struct long_int_num *p_a); 31uint32_t bn_get_valid_len(const uint8_t *pd, uint32_t size); 32 33/* The value of the |exp| power module |p_n| of |p_m| is calculated 34* by using the algorithm of Montgomery module power. 35* 36* |n_n0_i| and |p_rr| are precomputed values stored in the public key. 37* 38* return the value of |p_m|^|exp| mod |p_m| 39*/ 40struct long_int_num *montgomery_mod_exp(struct long_int_num *p_m, struct long_int_num *p_n, 41 unsigned long n_n0_i, struct long_int_num *p_rr, 42 uint32_t exp); 43 44#endif 45