[#BN_with_flags]
= BN_with_flags
:mrdocs:

Make `dest` a temporary read‐only clone of `b` with flags replaced by `flags.`

== Synopsis

Declared in `<openssl/bn.h>`

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

== Description

For temporary use only: `dest` and `b` must not be used concurrently, and `dest` should be a freshly BN_new()'d BIGNUM that has not been initialised otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dest*
| Destination BIGNUM receiving the aliased limbs and new flags.
| *b*
| Source BIGNUM whose limbs are shared.
| *flags*
| Replacement BN_FLG_* flag word for `dest.`
|===


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