[#poly1305_donna-poly1305_init]
= xref:poly1305_donna.adoc[poly1305&lowbar;donna]::poly1305&lowbar;init
:relfileprefix: ../
:mrdocs:

Initialize a Poly1305 state with a 32&hyphen;byte one&hyphen;time key&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
poly1305&lowbar;init(
    poly1305&lowbar;context* st,
    unsigned char const key[]) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *st*
| State to initialize&period;
| *key*
| The 32&hyphen;byte one&hyphen;time key&period;
|===


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