[#OSSL_CRMF_MSG_get0_regCtrl_oldCertID]
= OSSL_CRMF_MSG_get0_regCtrl_oldCertID
:mrdocs:

Return the oldCertID regCtrl from a CRMF CertReqMsg, if present.

== Synopsis

Declared in `<openssl/crmf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_CRMF_CERTID.adoc[OSSL_CRMF_CERTID]*
OSSL_CRMF_MSG_get0_regCtrl_oldCertID(xref:OSSL_CRMF_MSG.adoc[OSSL_CRMF_MSG] const* msg);
----

== Return Value

Internal CertId of the certificate being renewed, or NULL if absent; see RFC 4211 section 6.5.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *msg*
| CertReqMsg to query.
|===


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