ossl_cmp_hdr_set_implicitConfirm
int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr);
if (ctx->implicitConfirm && !ossl_cmp_hdr_set_implicitConfirm(msg->header))
if (ctx->implicitConfirm && !ossl_cmp_hdr_set_implicitConfirm(msg->header))
&& TEST_true(ossl_cmp_hdr_set_implicitConfirm(fixture->hdr))