[#EVP_PKEY_get_default_digest_nid]
= EVP_PKEY_get_default_digest_nid
:mrdocs:

Return the default message‐digest NID associated with `pkey.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_get_default_digest_nid(
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    int* pnid);
----

== Return Value

1 if an advisory default was returned, 2 if the digest is mandatory, or a non‐positive value on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pkey*
| Key whose signature defaults are queried.
| *pnid*
| Receives the NID (for example NID_sha256), or NID_undef when unrestricted.
|===


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