天津市建设安全协会网站,社区网站开发需求文档,昆明seo博客南网站建设,展示展览设计公司文章目录 openssl3.2 - 官方demo学习 - smime - smdec.c概述笔记END openssl3.2 - 官方demo学习 - smime - smdec.c
概述
从pem证书中得到x509*和私钥, 用私钥和证书解密MIME格式的PKCS7密文, 并保存解密后的明文 MIME的数据操作, 都是PKCS7相关的
笔记
/*!
\file smdec.c
… 文章目录 openssl3.2 - 官方demo学习 - smime - smdec.c概述笔记END openssl3.2 - 官方demo学习 - smime - smdec.c
概述
从pem证书中得到x509*和私钥, 用私钥和证书解密MIME格式的PKCS7密文, 并保存解密后的明文 MIME的数据操作, 都是PKCS7相关的
笔记
/*!
\file smdec.c
\note
openssl3.2 - 官方demo学习 - smime - smdec.c从pem证书中得到x509*和私钥, 用私钥和证书解密MIME格式的PKCS7密文, 并保存解密后的明文
MIME的数据操作, 都是PKCS7相关的
*//** Copyright 2007-2023 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*//* Simple S/MIME signing example */
#include openssl/pem.h
#include openssl/pkcs7.h
#include openssl/err.h#include my_openSSL_lib.hint main(int argc, char **argv)
{BIO *_bio_sm NULL, *_bio_out NULL, *_bio_pem NULL;X509 *_x509_pem NULL;EVP_PKEY *_evp_pkey NULL;PKCS7 *_pkcs7 NULL;int ret EXIT_FAILURE;OpenSSL_add_all_algorithms();ERR_load_crypto_strings();/* Read in recipient certificate and private key */_bio_pem BIO_new_file(signer.pem, r);if (!_bio_pem)goto err;_x509_pem PEM_read_bio_X509(_bio_pem, NULL, 0, NULL);BIO_reset(_bio_pem);_evp_pkey PEM_read_bio_PrivateKey(_bio_pem, NULL, 0, NULL);if (!_x509_pem || !_evp_pkey)goto err;/* Open content being signed */_bio_sm BIO_new_file(smencr.txt, r);if (!_bio_sm)goto err;/* Sign content */_pkcs7 SMIME_read_PKCS7(_bio_sm, NULL);if (!_pkcs7)goto err;_bio_out BIO_new_file(encrout.txt, w);if (!_bio_out)goto err;/* Decrypt S/MIME message */if (!PKCS7_decrypt(_pkcs7, _evp_pkey, _x509_pem, _bio_out, 0))goto err;ret EXIT_SUCCESS;err:if (ret ! EXIT_SUCCESS) {fprintf(stderr, Error Signing Data\n);ERR_print_errors_fp(stderr);}PKCS7_free(_pkcs7);X509_free(_x509_pem);EVP_PKEY_free(_evp_pkey);BIO_free(_bio_sm);BIO_free(_bio_out);BIO_free(_bio_pem);return ret;}
END
