feat: bring disk encryption support

Mostly copy-paste from `v1` of `go-blockdevice`, but with some fixes to
adapt to new code in other places.

Signed-off-by: Andrey Smirnov <[email protected]>

.dockerignore

@@ -1,11 +1,12 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2024-08-20T10:44:02Z by kres 7be2a05.
+# Generated on 2024-08-22T10:15:10Z by kres 9cc7f48.
 
 *
 !internal
 !blkid
 !block
+!encryption
 !partitioning
 !go.mod
 !go.sum

Dockerfile

@@ -2,7 +2,7 @@
 
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2024-08-20T12:11:08Z by kres 7be2a05.
+# Generated on 2024-08-22T10:15:10Z by kres 9cc7f48.
 
 ARG TOOLCHAIN
 
@@ -60,6 +60,7 @@ RUN --mount=type=cache,target=/go/pkg go mod verify
 COPY ./internal ./internal
 COPY ./blkid ./blkid
 COPY ./block ./block
+COPY ./encryption ./encryption
 COPY ./partitioning ./partitioning
 RUN --mount=type=cache,target=/go/pkg go list -mod=readonly all >/dev/null
 

blkid/internal/filesystems/luks/luks.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/siderolabs/go-blockdevice/v2/blkid/internal/magic"
 	"github.com/siderolabs/go-blockdevice/v2/blkid/internal/probe"
+	"github.com/siderolabs/go-blockdevice/v2/internal/luks2"
 )
 
 var luksMagic = magic.Magic{
@@ -37,13 +38,13 @@ func (p *Probe) Name() string {
 
 // Probe runs the further inspection and returns the result if successful.
 func (p *Probe) Probe(r probe.Reader, _ magic.Magic) (*probe.Result, error) {
-	buf := make([]byte, LUKS2HEADER_SIZE)
+	buf := make([]byte, luks2.LUKS2HEADER_SIZE)
 
 	if _, err := r.ReadAt(buf, 0); err != nil {
 		return nil, err
 	}
 
-	hdr := Luks2Header(buf)
+	hdr := luks2.Luks2Header(buf)
 
 	if hdr.Get_version() != 2 {
 		return nil, nil //nolint:nilnil

encryption/encryption.go

@@ -0,0 +1,6 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// Package encryption provides abstraction level for various disk encryption methods.
+package encryption