---
name: "CURLINFO_TLS_SESSION"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLINFO_TLS_SESSION"
---

# CURLINFO\_TLS\_SESSION(3)

TLS session info

## NAME

CURLINFO\_TLS\_SESSION - 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**This option has been superseded** by *[CURLINFO\_TLS\_SSL\_PTR(3)](/CURLINFO_TLS_SSL_PTR/3.md)*.

This option is exactly the same as *[CURLINFO\_TLS\_SSL\_PTR(3)](/CURLINFO_TLS_SSL_PTR/3.md)* 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)](/CURLINFO_TLS_SESSION/3.md)* OpenSSL session *internals* is **SSL\_CTX** \*.

  *[CURLINFO\_TLS\_SSL\_PTR(3)](/CURLINFO_TLS_SSL_PTR/3.md)* 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)](/CURLINFO_TLS_SSL_PTR/3.md)*. Refer to that document for more information.

- wolfSSL

  *[CURLINFO\_TLS\_SESSION(3)](/CURLINFO_TLS_SESSION/3.md)* wolfSSL session *internals* is **WOLFSSL\_CTX** \*.

  *[CURLINFO\_TLS\_SSL\_PTR(3)](/CURLINFO_TLS_SSL_PTR/3.md)* 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)](/CURLINFO_TLS_SSL_PTR/3.md)*. Refer to that document for more information.

## PROTOCOLS

This functionality affects  all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. only

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

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    struct curl_tlssessioninfo *tls;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    result = curl_easy_perform(curl);
    if(result != CURLE_OK)
      printf("error: %s\n", curl_easy_strerror(result));
    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)](/curl_easy_getinfo/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLINFO\_TLS\_SSL\_PTR**(3)](/CURLINFO_TLS_SSL_PTR/3.md), [**curl\_easy\_getinfo**(3)](/curl_easy_getinfo/3.md), [**curl\_easy\_setopt**(3)](/curl_easy_setopt/3.md)