docs/libcurl/opts/CURLINFO_TLS_SESSION.3

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.TH CURLINFO_TLS_SESSION 3 "November 04, 2020" "libcurl 7.78.0" "curl_easy_getinfo options"

.SH NAME
CURLINFO_TLS_SESSION \- get TLS session info
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
                           struct curl_tlssessioninfo **session);
.SH DESCRIPTION
\fBThis option has been superseded\fP by \fICURLINFO_TLS_SSL_PTR(3)\fP which
was added in 7.48.0. The only reason you would use this option instead is if
you could be using a version of libcurl earlier than 7.48.0.

This option is exactly the same as \fICURLINFO_TLS_SSL_PTR(3)\fP except in the
case of OpenSSL. If the session \fIbackend\fP is CURLSSLBACKEND_OPENSSL the
session \fIinternals\fP pointer varies depending on the option:

CURLINFO_TLS_SESSION OpenSSL session \fIinternals\fP is SSL_CTX *.

CURLINFO_TLS_SSL_PTR OpenSSL session \fIinternals\fP is SSL *.

You can obtain an SSL_CTX pointer from an SSL pointer using OpenSSL function
SSL_get_SSL_CTX. Therefore unless you need compatibility with older versions of
libcurl use \fICURLINFO_TLS_SSL_PTR(3)\fP. Refer to that document for more
information.
.SH PROTOCOLS
All TLS-based
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
  CURLcode res;
  struct curl_tlssessioninfo *tls;
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
  res = curl_easy_perform(curl);
  curl_easy_getinfo(curl, CURLINFO_TLS_SESSION, &tls);
  curl_easy_cleanup(curl);
}
.fi
.SH AVAILABILITY
Added in 7.34.0, and supported OpenSSL, GnuTLS, NSS and gskit only up until
7.48.0 was released.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
.BR CURLINFO_TLS_SSL_PTR "(3), "