[#EVP_PKEY_new_CMAC_key]
= EVP_PKEY_new_CMAC_key
:mrdocs:

Create an EVP_PKEY wrapping a CMAC key (deprecated).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
xref:EVP_PKEY.adoc[EVP_PKEY]*
EVP_PKEY_new_CMAC_key(
    xref:ENGINE.adoc[ENGINE]* e,
    unsigned char const* priv,
    size_t len,
    xref:EVP_CIPHER-07.adoc[EVP_CIPHER] const* cipher);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

New EVP_PKEY of type EVP_PKEY_CMAC, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *e*
| Unused legacy ENGINE parameter; pass NULL.
| *priv*
| CMAC key bytes.
| *len*
| Length of `priv` in bytes.
| *cipher*
| Block cipher underlying the CMAC (for example AES‐128‐CBC).
|===


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