[#BN_set_flags]
= BN_set_flags
:mrdocs:

Set selected BIGNUM flag bits on `b` (bitwise OR with `n).`

== Synopsis

Declared in `<openssl/bn.h>`

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

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| Big number whose flags are updated.
| *n*
| Combination of BN_FLG_* bits to set (for example BN_FLG_CONSTTIME).
|===


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