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3rdparty/curl/share/man/man3/CURLOPT_CERTINFO.3 2.72 KB
a86c63ca   Hu Chunming   提交三方库文件
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  .\" **************************************************************************
  .\" *                                  _   _ ____  _
  .\" *  Project                     ___| | | |  _ \| |
  .\" *                             / __| | | | |_) | |
  .\" *                            | (__| |_| |  _ <| |___
  .\" *                             \___|\___/|_| \_\_____|
  .\" *
  .\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
  .\" *
  .\" * This software is licensed as described in the file COPYING, which
  .\" * you should have received as part of this distribution. The terms
  .\" * are also available at https://curl.se/docs/copyright.html.
  .\" *
  .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  .\" * copies of the Software, and permit persons to whom the Software is
  .\" * furnished to do so, under the terms of the COPYING file.
  .\" *
  .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  .\" * KIND, either express or implied.
  .\" *
  .\" **************************************************************************
  .\"
  .TH CURLOPT_CERTINFO 3 "November 04, 2020" "libcurl 7.77.0" "curl_easy_setopt options"
  
  .SH NAME
  CURLOPT_CERTINFO \- request SSL certificate information
  .SH SYNOPSIS
  #include <curl/curl.h>
  
  CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CERTINFO, long certinfo);
  .SH DESCRIPTION
  Pass a long set to 1 to enable libcurl's certificate chain info gatherer. With
  this enabled, libcurl will extract lots of information and data about the
  certificates in the certificate chain used in the SSL connection. This data
  may then be retrieved after a transfer using \fIcurl_easy_getinfo(3)\fP and
  its option \fICURLINFO_CERTINFO(3)\fP.
  .SH DEFAULT
  0
  .SH PROTOCOLS
  All TLS-based
  .SH EXAMPLE
  .nf
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
  
    /* connect to any HTTPS site, trusted or not */
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
  
    curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L);
  
    res = curl_easy_perform(curl);
  
    if (!res) {
      struct curl_certinfo *ci;
      res = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &ci);
  
      if (!res) {
        printf("%d certs!\\n", ci->num_of_certs);
  
        for(i = 0; i < ci->num_of_certs; i++) {
          struct curl_slist *slist;
  
          for(slist = ci->certinfo[i]; slist; slist = slist->next)
            printf("%s\\n", slist->data);
        }
      }
    }
    curl_easy_cleanup(curl);
  }
  .fi
  .SH AVAILABILITY
  This option is supported by the OpenSSL, GnuTLS, Schannel, NSS and GSKit
  backends.
  .SH RETURN VALUE
  Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
  .SH "SEE ALSO"
  .BR CURLOPT_CAINFO "(3), " CURLOPT_SSL_VERIFYPEER "(3), "