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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       This  option  has  been superseded by CURLINFO_TLS_SSL_PTR(3) which was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
       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				  2025-06-03	       CURLINFO_TLS_SESSION(3)

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