[#PBKDF2PARAM_st-keylength]
= xref:PBKDF2PARAM_st.adoc[PBKDF2PARAM_st]::keylength
:relfileprefix: ../
:mrdocs:

Optional derived key length in octets; NULL means the cipher default.

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:ASN1_INTEGER.adoc[ASN1_INTEGER]* keylength;
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