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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>.