forked from snapcore/snapd
/
selinux.go
90 lines (77 loc) · 2.36 KB
/
selinux.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2014-2018 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 release
import (
"fmt"
"github.com/snapcore/snapd/selinux"
)
// SELinuxLevelType encodes the state of SELinux support found on this system.
type SELinuxLevelType int
const (
// NoSELinux indicates that SELinux is not enabled
NoSELinux SELinuxLevelType = iota
// SELinux is supported and in permissive mode
SELinuxPermissive
// SELinux is supported and in enforcing mode
SELinuxEnforcing
)
var (
selinuxIsEnabled = selinux.IsEnabled
selinuxIsEnforcing = selinux.IsEnforcing
)
// SELinuxLevel tells what level of SELinux enforcement is currently used
func SELinuxLevel() SELinuxLevelType {
level, _ := probeSELinux()
return level
}
// SELinuxSummary describes SELinux status
func SELinuxSummary() string {
_, summary := probeSELinux()
return summary
}
// SELinuxStatus returns the current level of SELinux support and a descriptive
// summary
func SELinuxStatus() (level SELinuxLevelType, summary string) {
return probeSELinux()
}
func probeSELinux() (SELinuxLevelType, string) {
enabled, err := selinuxIsEnabled()
if err != nil {
return NoSELinux, err.Error()
}
if !enabled {
return NoSELinux, ""
}
enforcing, err := selinuxIsEnforcing()
if err != nil {
return NoSELinux, fmt.Sprintf("SELinux is enabled, but status cannot be determined: %v", err)
}
if !enforcing {
return SELinuxPermissive, "SELinux is enabled but in permissive mode"
}
return SELinuxEnforcing, "SELinux is enabled and in enforcing mode"
}
// MockSELinuxIsEnabled makes the system believe a certain SELinux state is
// currently true
func MockSELinuxIsEnabled(isEnabled func() (bool, error)) (restore func()) {
old := selinuxIsEnabled
selinuxIsEnabled = isEnabled
return func() {
selinuxIsEnabled = old
}
}