[#BN_CTX_get]
= BN&lowbar;CTX&lowbar;get
:mrdocs:

Obtain a temporary BIGNUM from the current BN&lowbar;CTX frame started by BN&lowbar;CTX&lowbar;start()&period;

== Synopsis

Declared in `&lt;openssl&sol;bn&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIGNUM.adoc[BIGNUM]*
BN&lowbar;CTX&lowbar;get(xref:BN_CTX.adoc[BN&lowbar;CTX]* ctx);
----

== Return Value

Temporary BIGNUM owned by `ctx` (do not free), or NULL on error &sol; after a prior failure&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Context with an active BN&lowbar;CTX&lowbar;start() frame&period;
|===


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