做网站设计需要什么软件,创建自己的博客网站吗,做网站挣钱吗,前端做网站文章目录 openssl3.2 - 官方demo学习 - cms - cms_ver.c概述运行结果笔记END openssl3.2 - 官方demo学习 - cms - cms_ver.c
概述
CMS验签, 将单独签名和联合签名出来的签名文件都试试. 验签成功后, 将签名数据明文写入了文件供查看. 也就是说, 只有验签成功后, 才能看到签名… 文章目录 openssl3.2 - 官方demo学习 - cms - cms_ver.c概述运行结果笔记END openssl3.2 - 官方demo学习 - cms - cms_ver.c
概述
CMS验签, 将单独签名和联合签名出来的签名文件都试试. 验签成功后, 将签名数据明文写入了文件供查看. 也就是说, 只有验签成功后, 才能看到签名数据的明文. 验签时, 使用的是上一级的证书(这里是CA证书) 签名时, 使用的是低级证书(接收者证书, 或者说是签名者证书, 这些证书都是CA证书发出来的)
运行结果 不管是单独签名, 还是联合签名, 验签都是一个API搞定.
笔记
/*!
\file cms_ver.c
\note openssl3.2 - 官方demo学习 - cms - cms_ver.c
CMS验签, 将单独签名和联合签名出来的签名文件都试试.
验签成功后, 将签名数据明文写入了文件供查看.
也就是说, 只有验签成功后, 才能看到签名数据的明文.
验签时, 使用的是上一级的证书(这里是CA证书)
签名时, 使用的是低级证书(接收者证书)
*//** Copyright 2008-2023 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 verification example */
#include openssl/pem.h
#include openssl/cms.h
#include openssl/err.h#include my_openSSL_lib.h/** print any signingTime attributes.* signingTime is when each party purportedly signed the message.*/
static void print_signingTime(CMS_ContentInfo *cms)
{STACK_OF(CMS_SignerInfo) *sis;CMS_SignerInfo *si;X509_ATTRIBUTE *attr;ASN1_TYPE *t;ASN1_UTCTIME *utctime;ASN1_GENERALIZEDTIME *gtime;BIO *b;int i, loc;int iSignCnt 0;b BIO_new_fp(stdout, BIO_NOCLOSE | BIO_FP_TEXT);sis CMS_get0_SignerInfos(cms);iSignCnt sk_CMS_SignerInfo_num(sis);for (i 0; i iSignCnt; i) {si sk_CMS_SignerInfo_value(sis, i);loc CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1);attr CMS_signed_get_attr(si, loc);t X509_ATTRIBUTE_get0_type(attr, 0);if (t NULL)continue;switch (t-type) {case V_ASN1_UTCTIME:utctime t-value.utctime;ASN1_UTCTIME_print(b, utctime);break;case V_ASN1_GENERALIZEDTIME:gtime t-value.generalizedtime;ASN1_GENERALIZEDTIME_print(b, gtime);break;default:fprintf(stderr, unrecognized signingTime type\n);break;}BIO_printf(b, : signingTime from SignerInfo %i\n, i);}BIO_free(b);return;
}int verify_sign()
{BIO* in NULL, * out NULL, * tbio NULL, * cont NULL;X509_STORE* st NULL;X509* cacert NULL;CMS_ContentInfo* cms NULL;int ret EXIT_FAILURE;//OpenSSL_add_all_algorithms();//ERR_load_crypto_strings();/* Set up trusted CA certificate store */st X509_STORE_new();if (st NULL)goto err;/* Read in CA certificate */tbio BIO_new_file(cacert.pem, r);if (tbio NULL)goto err;cacert PEM_read_bio_X509(tbio, NULL, 0, NULL);if (cacert NULL)goto err;if (!X509_STORE_add_cert(st, cacert))goto err;/* Open message being verified */in BIO_new_file(smout.txt, r);if (in NULL)goto err;/* parse message */cms SMIME_read_CMS(in, cont);if (cms NULL)goto err;print_signingTime(cms);/* File to output verified content to */out BIO_new_file(smver.txt, w);if (out NULL)goto err;if (!CMS_verify(cms, NULL, st, cont, out, 0)) {fprintf(stderr, Verification Failure\n);goto err;}printf(Verification Successful\n);ret EXIT_SUCCESS;err:if (ret ! EXIT_SUCCESS) {fprintf(stderr, Error Verifying Data\n);ERR_print_errors_fp(stderr);}X509_STORE_free(st);CMS_ContentInfo_free(cms);X509_free(cacert);BIO_free(in);BIO_free(out);BIO_free(tbio);return ret;}int verify_sign2()
{BIO* in NULL, * out NULL, * tbio NULL, * cont NULL;X509_STORE* st NULL;X509* cacert NULL;CMS_ContentInfo* cms NULL;int ret EXIT_FAILURE;//OpenSSL_add_all_algorithms();//ERR_load_crypto_strings();/* Set up trusted CA certificate store */st X509_STORE_new();if (st NULL)goto err;/* Read in CA certificate */tbio BIO_new_file(cacert.pem, r);if (tbio NULL)goto err;cacert PEM_read_bio_X509(tbio, NULL, 0, NULL);if (cacert NULL)goto err;if (!X509_STORE_add_cert(st, cacert))goto err;/* Open message being verified */in BIO_new_file(smout2.txt, r);if (in NULL)goto err;/* parse message */cms SMIME_read_CMS(in, cont);if (cms NULL)goto err;print_signingTime(cms);/* File to output verified content to */out BIO_new_file(smver2.txt, w);if (out NULL)goto err;if (!CMS_verify(cms, NULL, st, cont, out, 0)) {fprintf(stderr, Verification Failure\n);goto err;}printf(Verification Successful\n);ret EXIT_SUCCESS;err:if (ret ! EXIT_SUCCESS) {fprintf(stderr, Error Verifying Data\n);ERR_print_errors_fp(stderr);}X509_STORE_free(st);CMS_ContentInfo_free(cms);X509_free(cacert);BIO_free(in);BIO_free(out);BIO_free(tbio);return ret;}#define LINE10 ----------
#define LINE60 LINE10 LINE10 LINE10 LINE10 LINE10 LINE10int main(int argc, char **argv)
{OpenSSL_add_all_algorithms();ERR_load_crypto_strings();printf(%s\n, LINE60);printf( veirfy sign\n);if (EXIT_SUCCESS ! verify_sign()){return -1;}printf(%s\n, LINE60);printf( veirfy sign2\n);if (EXIT_SUCCESS ! verify_sign2()){return -1;}printf(END\n);return 0;
}
END
