e694c8284a
Expand a little. - mention the type name of the return code - avoid stating which exact return codes that might be returned, as that varies over time, builds and conditions - avoid stating some always return OK - refer to the manpage documenting all the return codes Closes #15900
101 lines
2.1 KiB
Markdown
101 lines
2.1 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Title: CURLOPT_CERTINFO
|
|
Section: 3
|
|
Source: libcurl
|
|
See-also:
|
|
- CURLINFO_CAINFO (3)
|
|
- CURLINFO_CAPATH (3)
|
|
- CURLINFO_CERTINFO (3)
|
|
- CURLOPT_CAINFO (3)
|
|
- CURLOPT_SSL_VERIFYPEER (3)
|
|
Protocol:
|
|
- TLS
|
|
TLS-backend:
|
|
- OpenSSL
|
|
- GnuTLS
|
|
- Schannel
|
|
- Secure Transport
|
|
Added-in: 7.19.1
|
|
---
|
|
|
|
# NAME
|
|
|
|
CURLOPT_CERTINFO - request SSL certificate information
|
|
|
|
# SYNOPSIS
|
|
|
|
~~~c
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CERTINFO, long certinfo);
|
|
~~~
|
|
|
|
# DESCRIPTION
|
|
|
|
Pass a long set to 1 to enable libcurl's certificate chain info gatherer. With
|
|
this enabled, libcurl extracts 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 curl_easy_getinfo(3) and
|
|
its option CURLINFO_CERTINFO(3).
|
|
|
|
# DEFAULT
|
|
|
|
0
|
|
|
|
# %PROTOCOLS%
|
|
|
|
# EXAMPLE
|
|
|
|
~~~c
|
|
int main(void)
|
|
{
|
|
CURL *curl = curl_easy_init();
|
|
if(curl) {
|
|
CURLcode res;
|
|
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) {
|
|
int i;
|
|
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);
|
|
}
|
|
}
|
|
~~~
|
|
|
|
# HISTORY
|
|
|
|
Schannel support added in 7.50.0. Secure Transport support added in 7.79.0.
|
|
mbedTLS support added in 8.9.0.
|
|
|
|
# %AVAILABILITY%
|
|
|
|
# RETURN VALUE
|
|
|
|
curl_easy_setopt(3) returns a CURLcode indicating success or error.
|
|
|
|
CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
|
|
libcurl-errors(3).
|