1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel (at) 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.haxx.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 ***************************************************************************/ 22 /* <DESC> 23 * Extract lots of TLS certificate info. 24 * </DESC> 25 */ 26 #include <stdio.h> 27 28 #include <curl/curl.h> 29 30 static size_t wrfu(void *ptr, size_t size, size_t nmemb, void *stream) 31 { 32 (void)stream; 33 (void)ptr; 34 return size * nmemb; 35 } 36 37 int main(void) 38 { 39 CURL *curl; 40 CURLcode res; 41 42 curl_global_init(CURL_GLOBAL_DEFAULT); 43 44 curl = curl_easy_init(); 45 if(curl) { 46 curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/"); 47 48 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wrfu); 49 50 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L); 51 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); 52 53 curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L); 54 curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L); 55 56 res = curl_easy_perform(curl); 57 58 if(!res) { 59 struct curl_certinfo *certinfo; 60 61 res = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &certinfo); 62 63 if(!res && certinfo) { 64 int i; 65 66 printf("%d certs!\n", certinfo->num_of_certs); 67 68 for(i = 0; i < certinfo->num_of_certs; i++) { 69 struct curl_slist *slist; 70 71 for(slist = certinfo->certinfo[i]; slist; slist = slist->next) 72 printf("%s\n", slist->data); 73 74 } 75 } 76 77 } 78 79 curl_easy_cleanup(curl); 80 } 81 82 curl_global_cleanup(); 83 84 return 0; 85 } 86
