SSL_SESSION_get0_cipher(3ssl)

SSL_SESSION_get0_cipher3ssl

Set and retrieve the ssl cipher associated with a session

Usage

 #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);

Overview

SSL_SESSION_get0_cipher() retrieves the cipher that was used by the connection when the session was created, or NULL if it cannot be determined.

The value returned is a pointer to an object maintained within s and should not be released.

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)).

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.

Releases

6 releases since Debian 9 (Stretch); the text changed 5 times.

  1. 9
  2. 10
  3. 11
  4. 12
  5. 13
  6. Arch

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.

From openssl 3.6.5-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.