SSL_SESSION_set_ex_data, SSL_SESSION_get_ex_data - get and set application specific data on a session

#include <openssl/ssl.h>

int SSL_SESSION_set_ex_data(SSL_SESSION *ss, int idx, void *data);
void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx);

SSL_SESSION_set_ex_data() enables an application to store arbitrary application specific data data in an SSL_SESSION structure ss. The index idx should be a value previously returned from a call to CRYPTO_get_ex_new_index(3).

SSL_SESSION_get_ex_data() retrieves application specific data previously stored in an SSL_SESSION structure s. The idx value should be the same as that used when originally storing the data.

SSL_SESSION_set_ex_data() returns 1 for success or 0 for failure.

SSL_SESSION_get_ex_data() returns the previously stored value or NULL on failure. NULL may also be a valid value.

ssl(7), CRYPTO_get_ex_new_index(3)

Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (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

2021-03-25 1.1.1k