[#Poly1305]
= Poly1305
:mrdocs:

C++ wrapper with std::byte span interface around poly1305_donna code.

== Synopsis

Declared in `<crypto/poly1305.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class Poly1305;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:Poly1305/2constructor.adoc[`Poly1305`]         [.small]#[constructor]#
| Construct a Poly1305 object with a given 32‐byte key.
| xref:Poly1305/Finalize.adoc[`Finalize`] 
| Write authentication tag to 16‐byte out.
| xref:Poly1305/Update.adoc[`Update`] 
| Process message bytes.
|===


== Static Data Members

[cols="1,4"]
|===
| Name| Description
| xref:Poly1305/KEYLEN.adoc[`KEYLEN`] 
| Length of the keys expected by the constructor.
| xref:Poly1305/TAGLEN.adoc[`TAGLEN`] 
| Length of the output produced by Finalize().
|===



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