[#EVP_SIGNATURE_names_do_all]
= EVP_SIGNATURE_names_do_all
:mrdocs:

Call `fn` for every name (including aliases) associated with a signature algorithm.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_SIGNATURE_names_do_all(
    xref:EVP_SIGNATURE.adoc[EVP_SIGNATURE] const* signature,
    void(* fn)(char const*, void*),
    void* data);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *signature*
| Signature algorithm whose names are enumerated.
| *fn*
| Callback receiving each algorithm name and `data.`
| *data*
| Opaque pointer passed through to `fn.`
|===


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