[#EVP_PKEY_type]
= EVP_PKEY_type
:mrdocs:

Map a public‐key type NID to its base algorithm type NID.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_type(int type);
----

== Return Value

Base type NID (for example EVP_PKEY_RSA), or NID_undef if unknown.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *type*
| Key type NID (possibly an alias such as EVP_PKEY_RSA2).
|===


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