CURLINFO_TLS_SESSION(3)    Library Functions Manual    CURLINFO_TLS_SESSION(3)

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       This option has been superseded by CURLINFO_TLS_SSL_PTR(3) which was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)

libcurl                           2024-05-22           CURLINFO_TLS_SESSION(3)