NAME¶

CURLINFO_TLS_SESSION - get TLS session info

SYNOPSIS¶

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,


                           struct curl_tlssessioninfo **session);

DESCRIPTION¶

This option has been superseded by CURLINFO_TLS_SSL_PTR(3) which was added in 7.48.0.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 CURLINFO_TLS_SSL_PTR(3) except in the case of OpenSSL. If the session backend is CURLSSLBACKEND_OPENSSL the session internals pointer varies depending on the option:

CURLINFO_TLS_SESSION(3) OpenSSL session internals is SSL_CTX *.

CURLINFO_TLS_SSL_PTR(3) OpenSSL session internals is SSL *.

You can obtain an SSL_CTX pointer from an SSL pointer using OpenSSL function SSL_get_SSL_CTX(3). Therefore unless you need compatibility with older versions of libcurl use CURLINFO_TLS_SSL_PTR(3). Refer to that document for more information.

PROTOCOLS¶

All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

This option works only with the following TLS backends: GnuTLS and OpenSSL

EXAMPLE¶

int main(void)
{


  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);


    if(res)


      printf("error: %s\n", curl_easy_strerror(res));


    curl_easy_getinfo(curl, CURLINFO_TLS_SESSION, &tls);


    curl_easy_cleanup(curl);


  }
}

AVAILABILITY¶

Added in 7.34.0. Deprecated since 7.48.0 and supported by OpenSSL and GnuTLS only up until this version was released.

RETURN VALUE¶

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO¶

CURLINFO_TLS_SSL_PTR(3), curl_easy_getinfo(3), curl_easy_setopt(3)