[#BN_dup]
= BN_dup
:mrdocs:

Allocate a new BIGNUM that is a deep copy of `a.`

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIGNUM.adoc[BIGNUM]*
BN_dup(xref:BIGNUM.adoc[BIGNUM] const* a);
----

== Return Value

New BIGNUM equal to `a,` or NULL on failure; free with BN_free().

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| Source value to duplicate.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#