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       This option has been superseded by CURLINFO_TLS_SSL_PTR(3) which was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

EXAMPLE
       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);
       }

AVAILABILITY
       Added in 7.34.0. Deprecated since 7.48.0 and supported OpenSSL, GnuTLS,
       NSS and gskit 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
       curl_easy_getinfo(3), curl_easy_setopt(3),  CURLINFO_TLS_SSL_PTR(3),

ibcurl 8.1.2                    April 26, 2023         CURLINFO_TLS_SESSION(3)