[#CHKDF_HMAC_SHA256_L32-Expand32]
= xref:CHKDF_HMAC_SHA256_L32.adoc[CHKDF&lowbar;HMAC&lowbar;SHA256&lowbar;L32]::Expand32
:relfileprefix: ../
:mrdocs:

Run the HKDF expand step and write 32 bytes of output key material&period;

== Synopsis

Declared in `&lt;crypto&sol;hkdf&lowbar;sha256&lowbar;32&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
Expand32(
    std::string const& info,
    unsigned char hash[]);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *info*
| Context and application specific information&period;
| *hash*
| Buffer receiving the derived 32&hyphen;byte key&period;
|===


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