[#EVP_aes_256_cfb1]
= EVP_aes_256_cfb1
:mrdocs:

Return the AES‐256 cipher in 1‐bit CFB mode.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_CIPHER-07.adoc[EVP_CIPHER] const*
EVP_aes_256_cfb1();
----

== Return Value

EVP_CIPHER for aes‐256‐cfb1, or NULL if unavailable.


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