[#OSSL_PROVIDER_get_capabilities]
= OSSL_PROVIDER_get_capabilities
:mrdocs:

Query a named provider capability via a callback.

== Synopsis

Declared in `<openssl/provider.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_PROVIDER_get_capabilities(
    xref:OSSL_PROVIDER.adoc[OSSL_PROVIDER] const* prov,
    char const* capability,
    xref:OSSL_CALLBACK.adoc[OSSL_CALLBACK]* cb,
    void* arg);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *prov*
| Provider to query.
| *capability*
| Capability name (for example "TLS‐GROUP").
| *cb*
| Callback invoked for each capability description.
| *arg*
| Opaque argument passed to `cb.`
|===


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