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
wrfu(void * ptr,size_t size,size_t nmemb,void * stream)32 static 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
main(void)39 int 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
