[#private_key_st-key_free]
= xref:private_key_st.adoc[private_key_st]::key_free
:relfileprefix: ../
:mrdocs:

Non‐zero when `key_data` was allocated and should be freed with the structure.

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int key_free;
----


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