DER_OID_SZ_id_sha256
const unsigned char ossl_der_oid_id_sha256[DER_OID_SZ_id_sha256] = {
DER_OID_SZ_id_sha256 + DER_SZ_NULL, \
extern const unsigned char ossl_der_oid_id_sha256[DER_OID_SZ_id_sha256];