[#RSA_get_ex_data]
= RSA_get_ex_data
:mrdocs:

Return application data previously stored on an RSA key at CRYPTO_EX index `idx` (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void*
RSA_get_ex_data(
    xref:RSA.adoc[RSA] const* r,
    int idx);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

Stored pointer, or NULL if unset.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *r*
| RSA key to query.
| *idx*
| Index from CRYPTO_get_ex_new_index() for RSA.
|===


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