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https://github.com/edgelesssys/constellation.git
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ac1128d07f
* Add common backend for interacting with cryptsetup * Use common cryptsetup backend in bootstrapper * Use common cryptsetup backend in disk-mapper * Use common cryptsetup backend in csi lib --------- Signed-off-by: Daniel Weiße <dw@edgeless.systems>
83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
//go:build linux && cgo
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/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package cryptsetup
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// #include <libcryptsetup.h>
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import "C"
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import (
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"errors"
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"github.com/martinjungblut/go-cryptsetup"
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)
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const (
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// ReadWriteQueueBypass is a flag to disable the write and read workqueues for a crypt device.
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ReadWriteQueueBypass = C.CRYPT_ACTIVATE_NO_WRITE_WORKQUEUE | C.CRYPT_ACTIVATE_NO_READ_WORKQUEUE
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wipeFlags = cryptsetup.CRYPT_ACTIVATE_PRIVATE | cryptsetup.CRYPT_ACTIVATE_NO_JOURNAL
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wipePattern = cryptsetup.CRYPT_WIPE_ZERO
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)
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var errInvalidType = errors.New("device is not a *cryptsetup.Device")
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func format(device cryptDevice, integrity bool) error {
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switch d := device.(type) {
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case cgoFormatter:
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luks2Params := cryptsetup.LUKS2{
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SectorSize: 4096,
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PBKDFType: &cryptsetup.PbkdfType{
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// Use low memory recommendation from https://datatracker.ietf.org/doc/html/rfc9106#section-7
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Type: "argon2id",
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TimeMs: 2000,
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Iterations: 3,
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ParallelThreads: 4,
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MaxMemoryKb: 65536, // ~64MiB
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},
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}
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genericParams := cryptsetup.GenericParams{
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Cipher: "aes",
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CipherMode: "xts-plain64",
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VolumeKeySize: 64, // 32*2 bytes for aes-xts-plain64 encryption
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}
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if integrity {
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luks2Params.Integrity = "hmac(sha256)"
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genericParams.VolumeKeySize += 32 // 32 bytes for hmac(sha256) integrity
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}
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return d.Format(luks2Params, genericParams)
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default:
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return errInvalidType
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}
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}
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func initByDevicePath(devicePath string) (cryptDevice, error) {
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return cryptsetup.Init(devicePath)
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}
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func initByName(name string) (cryptDevice, error) {
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return cryptsetup.InitByName(name)
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}
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func loadLUKS2(device cryptDevice) error {
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switch d := device.(type) {
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case cgoLoader:
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return d.Load(cryptsetup.LUKS2{})
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default:
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return errInvalidType
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}
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}
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type cgoFormatter interface {
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Format(deviceType cryptsetup.DeviceType, genericParams cryptsetup.GenericParams) error
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}
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type cgoLoader interface {
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Load(deviceType cryptsetup.DeviceType) error
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}
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