} else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
    if (!setup_tbuf(rctx, ctx))
        return -1;
    if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
                                        rctx->tbuf, tbs,
                                        rctx->md, rctx->mgf1md,
                                        rctx->saltlen))
        return -1;