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system_files.go
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system_files.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 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 builtin
import (
"fmt"
"strings"
)
const systemFilesSummary = `allows access to system files or directories`
const systemFilesBaseDeclarationPlugs = `
system-files:
allow-installation: false
deny-auto-connection: true
`
const systemFilesBaseDeclarationSlots = `
system-files:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const systemFilesConnectedPlugAppArmor = `
# Description: Can access specific system files or directories.
# This is restricted because it gives file access to arbitrary locations.
`
type systemFilesInterface struct {
commonFilesInterface
}
func validateSinglePathSystem(np string) error {
if !strings.HasPrefix(np, "/") {
return fmt.Errorf(`%q must start with "/"`, np)
}
if strings.Contains(np, "$HOME") {
return fmt.Errorf(`$HOME cannot be used in %q`, np)
}
return nil
}
func init() {
registerIface(&systemFilesInterface{
commonFilesInterface{
commonInterface: commonInterface{
name: "system-files",
summary: systemFilesSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationPlugs: systemFilesBaseDeclarationPlugs,
baseDeclarationSlots: systemFilesBaseDeclarationSlots,
},
apparmorHeader: systemFilesConnectedPlugAppArmor,
extraPathValidate: validateSinglePathSystem,
},
})
}