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

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, 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:  * Shows HTTPS usage with client certs and optional ssl engine use.
                     24:  * </DESC>
                     25:  */
                     26: #include <assert.h>
                     27: #include <ctype.h>
                     28: #include <stdio.h>
                     29: #include <stdlib.h>
                     30: #include <string.h>
                     31: 
                     32: #include <curl/curl.h>
                     33: 
                     34: /*
                     35:  * An SSL-enabled libcurl is required for this sample to work (at least one
                     36:  * SSL backend has to be configured).
                     37:  *
                     38:  *  **** This example only works with libcurl 7.56.0 and later! ****
                     39: */
                     40: 
                     41: int main(int argc, char **argv)
                     42: {
                     43:   const char *name = argc > 1 ? argv[1] : "openssl";
                     44:   CURLsslset result;
                     45: 
                     46:   if(!strcmp("list", name)) {
                     47:     const curl_ssl_backend **list;
                     48:     int i;
                     49: 
                     50:     result = curl_global_sslset(-1, NULL, &list);
                     51:     assert(result == CURLSSLSET_UNKNOWN_BACKEND);
                     52: 
                     53:     for(i = 0; list[i]; i++)
                     54:       printf("SSL backend #%d: '%s' (ID: %d)\n",
                     55:              i, list[i]->name, list[i]->id);
                     56: 
                     57:     return 0;
                     58:   }
                     59:   else if(isdigit((int)(unsigned char)*name)) {
                     60:     int id = atoi(name);
                     61: 
                     62:     result = curl_global_sslset((curl_sslbackend)id, NULL, NULL);
                     63:   }
                     64:   else
                     65:     result = curl_global_sslset(-1, name, NULL);
                     66: 
                     67:   if(result == CURLSSLSET_UNKNOWN_BACKEND) {
                     68:     fprintf(stderr, "Unknown SSL backend id: %s\n", name);
                     69:     return 1;
                     70:   }
                     71: 
                     72:   assert(result == CURLSSLSET_OK);
                     73: 
                     74:   printf("Version with SSL backend '%s':\n\n\t%s\n", name, curl_version());
                     75: 
                     76:   return 0;
                     77: }