[#SCT_get_signature_nid]
= SCT_get_signature_nid
:mrdocs:

Return the NID of the signature algorithm used by an SCT.

== Synopsis

Declared in `<openssl/ct.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SCT_get_signature_nid(xref:SCT.adoc[SCT] const* sct);
----

== Return Value

An NID such as NID_sha256WithRSAEncryption or NID_ecdsa_with_SHA256, or NID_undef.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *sct*
| SCT to query.
|===


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