/
activate.go
61 lines (50 loc) · 1.86 KB
/
activate.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package luks2
import (
"bytes"
"fmt"
"os"
"os/exec"
"github.com/snapcore/snapd/osutil"
)
var (
systemdCryptsetupPath = "/lib/systemd/systemd-cryptsetup"
)
// Activate unlocks the LUKS device at sourceDevicePath using systemd-cryptsetup and creates a device
// mapping with the supplied volumeName. The device is unlocked using the supplied key.
func Activate(volumeName, sourceDevicePath string, key []byte) error {
cmd := exec.Command(systemdCryptsetupPath, "attach", volumeName, sourceDevicePath, "/dev/stdin", "luks,tries=1")
cmd.Env = os.Environ()
cmd.Env = append(cmd.Env, "SYSTEMD_LOG_TARGET=console")
cmd.Stdin = bytes.NewReader(key)
if output, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("systemd-cryptsetup failed with: %v", osutil.OutputErr(output, err))
}
return nil
}
// Deactivate detaches the LUKS volume with the supplied name.
func Deactivate(volumeName string) error {
cmd := exec.Command(systemdCryptsetupPath, "detach", volumeName)
cmd.Env = os.Environ()
cmd.Env = append(cmd.Env, "SYSTEMD_LOG_TARGET=console")
if output, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("systemd-cryptsetup failed with: %v", osutil.OutputErr(output, err))
}
return nil
}