[#ChaCha20Aligned-Crypt]
= xref:ChaCha20Aligned.adoc[ChaCha20Aligned]::Crypt
:relfileprefix: ../
:mrdocs:

en/deciphers the message <input> and write the result into <output>

== Synopsis

Declared in `<crypto/chacha20.h>`

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

== Description

The size of input and output must be equal, and be a multiple of BLOCKLEN.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *input*
| The message to encrypt or decrypt.
| *output*
| Output buffer receiving the result; must be the same size as `input.`
|===


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