[#RSA_check_key_ex]
= RSA_check_key_ex
:mrdocs:

Validate RSA key components with an optional progress callback (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
RSA_check_key_ex(
    xref:RSA.adoc[RSA] const* rsa,
    xref:BN_GENCB.adoc[BN_GENCB]* cb);
----

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

1 if the key is valid, or 0 if invalid / on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rsa*
| RSA key to check.
| *cb*
| Optional BN_GENCB progress callback, or NULL.
|===


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