| // Copyright 2020 The Monogon Project Authors. |
| // |
| // SPDX-License-Identifier: Apache-2.0 |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package efivarfs |
| |
| import ( |
| "github.com/google/uuid" |
| ) |
| |
| // MarshalEFIGUID returns src represented in the EFI GUID format, as defined in |
| // UEFI specification, version 2.9, appendix A: |
| // https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf |
| func MarshalEFIGUID(src uuid.UUID) []byte { |
| efi := make([]byte, 16) |
| transform := []int{3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15} |
| for dest, from := range transform { |
| efi[dest] = src[from] |
| } |
| return efi |
| } |