SSL_SESSION_GET0_CIPHER(3ossl)

📦 version 3.5.0, in opensuse-leap 16.0

✨ NAME ✨ — the SSL_SESSION_GET0_CIPHER(3ossl) manual page from OpenSSL, bestie 💅

  • SSL_SESSION_get0_cipher, SSL_SESSION_set_cipher — set and retrieve the SSL cipher associated with a session. 🎀

🦋 SYNOPSIS 🦋

okay so here's the exact include and signatures, keep them as-is:

#include <openssl/ssl.h>

const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s);
int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher);

🌸 DESCRIPTION 🌸

So SSL_SESSION_get0_cipher() is your retrieval bestie: it gives you the cipher that was used by the connection when the session was created, or NULL if it cannot be determined. Periodt. 🔍

💀 important caveat: the value returned is a pointer to an object maintained within s — do not release it. It's not yours to free, bestie.

SSL_SESSION_set_cipher() can be used to set the ciphersuite associated with the SSL_SESSION s to cipher. For example, this could be used to set up a session based PSK (see SSL_CTX_set_psk_use_session_callback(3)). Iconic. ✨

💖 RETURN VALUES 💖

  • SSL_SESSION_get0_cipher() — returns the SSL_CIPHER associated with the SSL_SESSION, or NULL if it cannot be determined. 🫶
  • SSL_SESSION_set_cipher() — returns 1 on success or 0 on failure. ✅

🎀 SEE ALSO 🎀

go read these too, iykyk:

⭐ HISTORY ⭐

  • The SSL_SESSION_get0_cipher() function was added in OpenSSL 1.1.0. 🕰️
  • The SSL_SESSION_set_cipher() function was added in OpenSSL 1.1.1. 🕰️

Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

okay that's the whole page, bestie — signing off with OpenSSL 3.5.0, dated 2026-09-25 💖✨

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