[#ENGINE_PKEY_METHS_PTR]
= ENGINE_PKEY_METHS_PTR
:mrdocs:

ENGINE public‐key method handler: list supported NIDs or return an EVP_PKEY_METHOD.

== Synopsis

Declared in `<openssl/engine.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int(* ENGINE_PKEY_METHS_PTR)(xref:ENGINE.adoc[ENGINE]*, xref:EVP_PKEY_METHOD.adoc[EVP_PKEY_METHOD]**, int const**, int);
----

== Return Value

Number of NIDs when listing, 1 when a method is returned, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *e*
| ENGINE being queried (first parameter of the callback).
| *pmeth*
| When non‐NULL, receives the EVP_PKEY_METHOD for the requested NID.
| *nids*
| When `pmeth` is NULL, receives the array of supported NIDs.
| *nid*
| NID to look up when `pmeth` is non‐NULL.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#