网站加入搜索引擎怎么做,东昌网站建设费用,网站优化怎么做,恒大地产最新消息文章目录 openssl3.2 - 官方demo学习 - pkey - EVP_PKEY_DSA_paramfromdata.c概述笔记END openssl3.2 - 官方demo学习 - pkey - EVP_PKEY_DSA_paramfromdata.c
概述
开源工程包含的头文件类型是.inc, 要重命名为.h, 否则没有c头文件语法提示
从数组中载入大数p,q,g 建立ossl… 文章目录 openssl3.2 - 官方demo学习 - pkey - EVP_PKEY_DSA_paramfromdata.c概述笔记END openssl3.2 - 官方demo学习 - pkey - EVP_PKEY_DSA_paramfromdata.c
概述
开源工程包含的头文件类型是.inc, 要重命名为.h, 否则没有c头文件语法提示
从数组中载入大数p,q,g 建立ossl_param, 设置参数的p,q,g 用参数初始化_evp_pkey_ctx, 得到_evp_pkey_dsa 打印_evp_pkey_dsa的共有数据(p,q,g …) 参数
笔记
/*!
\file EVP_PKEY_DSA_paramfromdata.c
\note
openssl3.2 - 官方demo学习 - pkey - EVP_PKEY_DSA_paramfromdata.c开源工程包含的头文件类型是.inc, 要重命名为.h, 否则没有c头文件语法提示从数组中载入大数p,q,g
建立ossl_param, 设置参数的p,q,g
用参数初始化_evp_pkey_ctx, 得到_evp_pkey_dsa
打印_evp_pkey_dsa的共有数据(p,q,g ...) 参数
*//*-* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.** Licensed under the Apache License 2.0 (the License). You may not use* this file except in compliance with the License. You can obtain a copy* in the file LICENSE in the source distribution or at* https://www.openssl.org/source/license.html*//** Example showing how to load DSA params from raw data* using EVP_PKEY_fromdata()*/#include openssl/param_build.h
#include openssl/evp.h
#include openssl/core_names.h
#include dsa.h#include my_openSSL_lib.hint main(int argc, char** argv)
{int ret EXIT_FAILURE;OSSL_LIB_CTX* _ossl_lib_ctx NULL;const char* propq NULL;EVP_PKEY_CTX* _evp_pkey_ctx NULL;EVP_PKEY* _evp_pkey_dsa NULL;OSSL_PARAM_BLD* _ossl_param_bld NULL;OSSL_PARAM* _ossl_param NULL;BIGNUM* p NULL, * q NULL, * g NULL;p BN_bin2bn(dsa_p, sizeof(dsa_p), NULL);q BN_bin2bn(dsa_q, sizeof(dsa_q), NULL);g BN_bin2bn(dsa_g, sizeof(dsa_g), NULL);if (p NULL || q NULL || g NULL)goto cleanup;/* Use OSSL_PARAM_BLD if you need to handle BIGNUM Parameters */_ossl_param_bld OSSL_PARAM_BLD_new();if (_ossl_param_bld NULL)goto cleanup;if (!OSSL_PARAM_BLD_push_BN(_ossl_param_bld, OSSL_PKEY_PARAM_FFC_P, p)|| !OSSL_PARAM_BLD_push_BN(_ossl_param_bld, OSSL_PKEY_PARAM_FFC_Q, q)|| !OSSL_PARAM_BLD_push_BN(_ossl_param_bld, OSSL_PKEY_PARAM_FFC_G, g))goto cleanup;_ossl_param OSSL_PARAM_BLD_to_param(_ossl_param_bld);if (_ossl_param NULL)goto cleanup;_evp_pkey_ctx EVP_PKEY_CTX_new_from_name(_ossl_lib_ctx, DSA, propq);if (_evp_pkey_ctx NULL) {fprintf(stderr, EVP_PKEY_CTX_new_from_name() failed\n);goto cleanup;}if (EVP_PKEY_fromdata_init(_evp_pkey_ctx) 0|| EVP_PKEY_fromdata(_evp_pkey_ctx, _evp_pkey_dsa, EVP_PKEY_KEY_PARAMETERS, _ossl_param) 0) {fprintf(stderr, EVP_PKEY_fromdata() failed\n);goto cleanup;}if (!dsa_print_key(_evp_pkey_dsa, 0, _ossl_lib_ctx, propq))goto cleanup;ret EXIT_SUCCESS;
cleanup:EVP_PKEY_free(_evp_pkey_dsa);EVP_PKEY_CTX_free(_evp_pkey_ctx);OSSL_PARAM_free(_ossl_param);OSSL_PARAM_BLD_free(_ossl_param_bld);BN_free(g);BN_free(q);BN_free(p);return ret;
}
END
