[#RSA_size]
= RSA_size
:mrdocs:

Return the RSA modulus size in bytes (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

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

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

Byte length of the modulus (RSA_size), or 0 if unset.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rsa*
| RSA key whose modulus size is queried.
|===


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