[#ENGINE_by_id]
= ENGINE&lowbar;by&lowbar;id
:mrdocs:

Look up a registered ENGINE by its unique id string (deprecated)&period;

== Synopsis

Declared in `&lt;openssl&sol;engine&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;deprecated&rsqb;&rsqb;
xref:ENGINE.adoc[ENGINE]*
ENGINE&lowbar;by&lowbar;id(char const* id);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

Structural reference to the ENGINE, or NULL if not found&semi; free with ENGINE&lowbar;free()&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *id*
| ENGINE identifier (for example &quot;dynamic&quot; or a built&hyphen;in engine id)&period;
|===


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