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       This option has been superseded by CURLINFO_TLS_SSL_PTR(3).

       This  option is exactly the same as CURLINFO_TLS_SSL_PTR(3) except in the case of OpenSSL and wolfSSL. If
       the session backend is CURLSSLBACKEND_OPENSSL the session  internals  pointer  varies  depending  on  the
       option:

       OpenSSL:
              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.

       wolfSSL
              CURLINFO_TLS_SESSION(3) wolfSSL session internals is WOLFSSL_CTX *.

              CURLINFO_TLS_SSL_PTR(3) wolfSSL session internals is WOLFSSL *.

              You   can   obtain   an   WOLFSSL_CTX   pointer   from  an  SSL  pointer  using  wolfSSL  function
              wolfSSL_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

       This functionality affects 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);
         }
       }

DEPRECATED

       Deprecated since 7.48.0

AVAILABILITY

       Added in curl 7.34.0

RETURN VALUE

       curl_easy_getinfo(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).

SEE ALSO

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

libcurl                                            2025-11-07                            CURLINFO_TLS_SESSION(3)