[#ChaCha20-2constructor-05]
= xref:ChaCha20.adoc[ChaCha20]::ChaCha20
:relfileprefix: ../
:mrdocs:

Initialize a cipher with specified 32‐byte key.

== Synopsis

Declared in `<crypto/chacha20.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
ChaCha20(std::span<std::byte const> key) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| The 32‐byte key.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#