| Mateusz Zalega | 612a033 | 2021-11-17 20:04:52 +0100 | [diff] [blame] | 1 | // Copyright 2020 The Monogon Project Authors. |
| 2 | // |
| 3 | // SPDX-License-Identifier: Apache-2.0 |
| 4 | // |
| 5 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | // you may not use this file except in compliance with the License. |
| 7 | // You may obtain a copy of the License at |
| 8 | // |
| 9 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | // |
| 11 | // Unless required by applicable law or agreed to in writing, software |
| 12 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | // See the License for the specific language governing permissions and |
| 15 | // limitations under the License. |
| 16 | |
| 17 | package efivarfs |
| 18 | |
| 19 | import ( |
| 20 | "github.com/google/uuid" |
| 21 | ) |
| 22 | |
| 23 | // MarshalEFIGUID returns src represented in the EFI GUID format, as defined in |
| 24 | // UEFI specification, version 2.9, appendix A: |
| 25 | // https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf |
| 26 | func MarshalEFIGUID(src uuid.UUID) []byte { |
| 27 | efi := make([]byte, 16) |
| 28 | transform := []int{3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15} |
| 29 | for dest, from := range transform { |
| 30 | efi[dest] = src[from] |
| 31 | } |
| 32 | return efi |
| 33 | } |