[#EVP_sm4_ofb]
= EVP&lowbar;sm4&lowbar;ofb
:mrdocs:

Return the EVP&lowbar;CIPHER for SM4 in OFB mode&period;

== Synopsis

Declared in `&lt;openssl&sol;evp&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_CIPHER-07.adoc[EVP&lowbar;CIPHER] const*
EVP&lowbar;sm4&lowbar;ofb();
----

== Return Value

EVP&lowbar;CIPHER for SM4&hyphen;OFB, or NULL if unavailable&period;


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