[#EVP_SIGNATURE_is_a]
= EVP_SIGNATURE_is_a
:mrdocs:

Test whether a signature algorithm implementation matches a name.

== Synopsis

Declared in `<openssl/evp.h>`

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

== Return Value

1 if `signature` is known as `name,` or 0 otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *signature*
| Signature algorithm object to query.
| *name*
| Algorithm name (for example "RSA" or "ED25519").
|===


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