- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUES
- SEE ALSO
- COPYRIGHT

# NAME

SSL_CTX_get_ex_data, SSL_CTX_set_ex_data, SSL_get_ex_data, SSL_set_ex_data - Store and retrieve extra data from the SSL_CTX, SSL or SSL_SESSION

# SYNOPSIS

     #include <openssl/ssl.h>

     void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx);

     int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg);

     void *SSL_get_ex_data(const SSL *s, int idx);

     int SSL_set_ex_data(SSL *s, int idx, void *arg);

# DESCRIPTION

SSL*_set_ex_data() functions can be used to store arbitrary user data into the SSL_CTX, or SSL object. The user must supply a unique index which they can subsequently use to retrieve the data using SSL*_get_ex_data().

For more detailed information see CRYPTO_get_ex_data(3) and CRYPTO_set_ex_data(3) which implement these functions and CRYPTO_get_ex_new_index(3) for generating a unique index.

# RETURN VALUES

The SSL*_set_ex_data() functions return 1 if the item is successfully stored and 0 if it is not. The SSL*_get_ex_data() functions return the ex_data pointer if successful, otherwise NULL.

# SEE ALSO

CRYPTO_get_ex_data(3), CRYPTO_set_ex_data(3), CRYPTO_get_ex_new_index(3)

# COPYRIGHT

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 https://www.openssl.org/source/license.html.