Return to sessioninfo.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / examples

Annotation of embedaddon/curl/docs/examples/sessioninfo.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2020, 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.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:  * Uses the CURLINFO_TLS_SESSION data.
                     24:  * </DESC>
                     25:  */
                     26: 
                     27: /* Note that this example currently requires curl to be linked against
                     28:    GnuTLS (and this program must also be linked against -lgnutls). */
                     29: 
                     30: #include <stdio.h>
                     31: 
                     32: #include <curl/curl.h>
                     33: #include <gnutls/gnutls.h>
                     34: #include <gnutls/x509.h>
                     35: 
                     36: static CURL *curl;
                     37: 
                     38: static size_t wrfu(void *ptr, size_t size, size_t nmemb, void *stream)
                     39: {
                     40:   const struct curl_tlssessioninfo *info;
                     41:   unsigned int cert_list_size;
                     42:   const gnutls_datum_t *chainp;
                     43:   CURLcode res;
                     44: 
                     45:   (void)stream;
                     46:   (void)ptr;
                     47: 
                     48:   res = curl_easy_getinfo(curl, CURLINFO_TLS_SESSION, &info);
                     49: 
                     50:   if(!res) {
                     51:     switch(info->backend) {
                     52:     case CURLSSLBACKEND_GNUTLS:
                     53:       /* info->internals is now the gnutls_session_t */
                     54:       chainp = gnutls_certificate_get_peers(info->internals, &cert_list_size);
                     55:       if((chainp) && (cert_list_size)) {
                     56:         unsigned int i;
                     57: 
                     58:         for(i = 0; i < cert_list_size; i++) {
                     59:           gnutls_x509_crt_t cert;
                     60:           gnutls_datum_t dn;
                     61: 
                     62:           if(GNUTLS_E_SUCCESS == gnutls_x509_crt_init(&cert)) {
                     63:             if(GNUTLS_E_SUCCESS ==
                     64:                gnutls_x509_crt_import(cert, &chainp[i], GNUTLS_X509_FMT_DER)) {
                     65:               if(GNUTLS_E_SUCCESS ==
                     66:                  gnutls_x509_crt_print(cert, GNUTLS_CRT_PRINT_FULL, &dn)) {
                     67:                 fprintf(stderr, "Certificate #%u: %.*s", i, dn.size, dn.data);
                     68: 
                     69:                 gnutls_free(dn.data);
                     70:               }
                     71:             }
                     72: 
                     73:             gnutls_x509_crt_deinit(cert);
                     74:           }
                     75:         }
                     76:       }
                     77:       break;
                     78:     case CURLSSLBACKEND_NONE:
                     79:     default:
                     80:       break;
                     81:     }
                     82:   }
                     83: 
                     84:   return size * nmemb;
                     85: }
                     86: 
                     87: int main(void)
                     88: {
                     89:   curl_global_init(CURL_GLOBAL_DEFAULT);
                     90: 
                     91:   curl = curl_easy_init();
                     92:   if(curl) {
                     93:     curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
                     94: 
                     95:     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wrfu);
                     96: 
                     97:     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
                     98:     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
                     99: 
                    100:     curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
                    101: 
                    102:     (void) curl_easy_perform(curl);
                    103: 
                    104:     curl_easy_cleanup(curl);
                    105:   }
                    106: 
                    107:   curl_global_cleanup();
                    108: 
                    109:   return 0;
                    110: }