1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24/* <DESC> 25 * Extract lots of TLS certificate info. 26 * </DESC> 27 */ 28#include <stdio.h> 29 30#include <curl/curl.h> 31 32static size_t wrfu(void *ptr, size_t size, size_t nmemb, void *stream) 33{ 34 (void)stream; 35 (void)ptr; 36 return size * nmemb; 37} 38 39int main(void) 40{ 41 CURL *curl; 42 CURLcode res; 43 44 curl_global_init(CURL_GLOBAL_DEFAULT); 45 46 curl = curl_easy_init(); 47 if(curl) { 48 curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/"); 49 50 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wrfu); 51 52 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L); 53 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); 54 55 curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L); 56 curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L); 57 58 res = curl_easy_perform(curl); 59 60 if(!res) { 61 struct curl_certinfo *certinfo; 62 63 res = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &certinfo); 64 65 if(!res && certinfo) { 66 int i; 67 68 printf("%d certs!\n", certinfo->num_of_certs); 69 70 for(i = 0; i < certinfo->num_of_certs; i++) { 71 struct curl_slist *slist; 72 73 for(slist = certinfo->certinfo[i]; slist; slist = slist->next) 74 printf("%s\n", slist->data); 75 76 } 77 } 78 79 } 80 81 curl_easy_cleanup(curl); 82 } 83 84 curl_global_cleanup(); 85 86 return 0; 87} 88