Return the certTemplate from a CRMF CertReqMsg.
Declared in <openssl/crmf.h>
<openssl/crmf.h>
OSSL_CRMF_CERTTEMPLATE* OSSL_CRMF_MSG_get0_tmpl(OSSL_CRMF_MSG const* crm);
Internal certTemplate pointer, or NULL on error.