OSSL_CRMF_CERTTEMPLATE_get0_issuer
const X509_NAME *issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl);
issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl);
const X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl);