[#Poly1305-Finalize]
= xref:Poly1305.adoc[Poly1305]::Finalize
:relfileprefix: ../
:mrdocs:

Write authentication tag to 16&hyphen;byte out&period;

== Synopsis

Declared in `&lt;crypto&sol;poly1305&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
Finalize(std::span&lt;std::byte&gt; out) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *out*
| Buffer receiving the 16&hyphen;byte authentication tag&period;
|===


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