- NAME
- SYNOPSIS
- DESCRIPTION
- EXAMPLES
- SEE ALSO

# NAME

SSL_get_ex_new_index, SSL_set_ex_data, SSL_get_ex_data - internal application specific data functions

# SYNOPSIS

     #include <openssl/ssl.h>

     int SSL_get_ex_new_index(long argl, void *argp,
                    CRYPTO_EX_new *new_func,
                    CRYPTO_EX_dup *dup_func,
                    CRYPTO_EX_free *free_func);

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

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

     typedef int new_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
                    int idx, long argl, void *argp);
     typedef void free_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
                    int idx, long argl, void *argp);
     typedef int dup_func(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from, void *from_d,
                    int idx, long argl, void *argp);

# DESCRIPTION

Several OpenSSL structures can have application specific data attached to them. These functions are used internally by OpenSSL to manipulate application specific data attached to a specific structure.

`SSL_get_ex_new_index()` is used to register a new index for application specific data.

`SSL_set_ex_data()` is used to store application data at arg for idx into the ssl object.

`SSL_get_ex_data()` is used to retrieve the information for idx from ssl.

A detailed description for the *_get_ex_new_index() functionality can be found in RSA_get_ex_new_index. The *_get_ex_data() and *_set_ex_data() functionality is described in CRYPTO_set_ex_data.

# EXAMPLES

An example on how to use the functionality is included in the example `verify_callback()` in SSL_CTX_set_verify.

# SEE ALSO

ssl, RSA_get_ex_new_index, CRYPTO_set_ex_data, SSL_CTX_set_verify