[#BN_get_flags]
= BN_get_flags
:mrdocs:

Test whether the given BN_FLG_* bits are set on a BIGNUM.

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BN_get_flags(
    xref:BIGNUM.adoc[BIGNUM] const* b,
    int n);
----

== Return Value

`n` bits that are set on `b` (0 if none).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| BIGNUM to query.
| *n*
| Flag mask (for example BN_FLG_CONSTTIME).
|===


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