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 * Shows HTTPS usage with client certs and optional ssl engine use. 26 * </DESC> 27 */ 28#include <assert.h> 29#include <ctype.h> 30#include <stdio.h> 31#include <stdlib.h> 32#include <string.h> 33 34#include <curl/curl.h> 35 36/* 37 * An SSL-enabled libcurl is required for this sample to work (at least one 38 * SSL backend has to be configured). 39 * 40 * **** This example only works with libcurl 7.56.0 and later! **** 41*/ 42 43int main(int argc, char **argv) 44{ 45 const char *name = argc > 1 ? argv[1] : "openssl"; 46 CURLsslset result; 47 48 if(!strcmp("list", name)) { 49 const curl_ssl_backend **list; 50 int i; 51 52 result = curl_global_sslset(CURLSSLBACKEND_NONE, NULL, &list); 53 assert(result == CURLSSLSET_UNKNOWN_BACKEND); 54 55 for(i = 0; list[i]; i++) 56 printf("SSL backend #%d: '%s' (ID: %d)\n", 57 i, list[i]->name, list[i]->id); 58 59 return 0; 60 } 61 else if(isdigit((int)(unsigned char)*name)) { 62 int id = atoi(name); 63 64 result = curl_global_sslset((curl_sslbackend)id, NULL, NULL); 65 } 66 else 67 result = curl_global_sslset(CURLSSLBACKEND_NONE, name, NULL); 68 69 if(result == CURLSSLSET_UNKNOWN_BACKEND) { 70 fprintf(stderr, "Unknown SSL backend id: %s\n", name); 71 return 1; 72 } 73 74 assert(result == CURLSSLSET_OK); 75 76 printf("Version with SSL backend '%s':\n\n\t%s\n", name, curl_version()); 77 78 return 0; 79} 80