[#CHKDF_HMAC_SHA256_L32]
= CHKDF&lowbar;HMAC&lowbar;SHA256&lowbar;L32
:mrdocs:

A rfc5869 HKDF implementation with HMAC&lowbar;SHA256 and fixed key output length of 32 bytes (L&equals;32)

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class CHKDF&lowbar;HMAC&lowbar;SHA256&lowbar;L32;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:CHKDF_HMAC_SHA256_L32/2constructor.adoc[`CHKDF&lowbar;HMAC&lowbar;SHA256&lowbar;L32`]         [.small]#[constructor]#
| Run the HKDF extract step over the input keying material and salt&period;
| xref:CHKDF_HMAC_SHA256_L32/Expand32.adoc[`Expand32`] 
| Run the HKDF expand step and write 32 bytes of output key material&period;
|===



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