mirror of
https://github.com/roddhjav/apparmor.d.git
synced 2024-11-15 07:54:17 +01:00
94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
// apparmor.d - Full set of apparmor profiles
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// Copyright (C) 2023 Alexandre Pujol <alexandre@pujol.io>
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// SPDX-License-Identifier: GPL-2.0-only
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package prebuild
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import (
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"regexp"
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"strings"
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"github.com/roddhjav/apparmor.d/pkg/aa"
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"github.com/roddhjav/apparmor.d/pkg/util"
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"golang.org/x/exp/slices"
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)
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// Build the profiles with the following build tasks
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var Builds = []BuildFunc{
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BuildUserspace,
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}
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var (
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regAttachments = regexp.MustCompile(`(profile .* @{exec_path})`)
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regFlags = regexp.MustCompile(`flags=\(([^)]+)\)`)
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regProfileHeader = regexp.MustCompile(` {`)
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regAbi4To3 = util.ToRegexRepl([]string{ // Currently Abi3 -> Abi4
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`abi/3.0`, `abi/4.0`,
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`# userns,`, `userns,`,
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})
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)
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type BuildFunc func(string) string
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// Set complain flag on all profiles
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func BuildComplain(profile string) string {
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flags := []string{}
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matches := regFlags.FindStringSubmatch(profile)
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if len(matches) != 0 {
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flags = strings.Split(matches[1], ",")
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if slices.Contains(flags, "complain") {
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return profile
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}
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}
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flags = append(flags, "complain")
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strFlags := " flags=(" + strings.Join(flags, ",") + ") {"
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// Remove all flags definition, then set manifest' flags
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profile = regFlags.ReplaceAllLiteralString(profile, "")
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return regProfileHeader.ReplaceAllLiteralString(profile, strFlags)
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}
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// Set all profiles in enforce mode
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func BuildEnforce(profile string) string {
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matches := regFlags.FindStringSubmatch(profile)
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if len(matches) == 0 {
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return profile
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}
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flags := strings.Split(matches[1], ",")
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idx := slices.Index(flags, "complain")
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if idx == -1 {
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return profile
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}
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flags = slices.Delete(flags, idx, idx+1)
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strFlags := "{"
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if len(flags) >= 1 {
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strFlags = " flags=(" + strings.Join(flags, ",") + ") {"
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}
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// Remove all flags definition, then set new flags
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profile = regFlags.ReplaceAllLiteralString(profile, "")
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return regProfileHeader.ReplaceAllLiteralString(profile, strFlags)
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}
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// Bypass userspace tools restriction
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func BuildUserspace(profile string) string {
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p := aa.DefaultTunables()
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p.ParseVariables(profile)
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p.ResolveAttachments()
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att := p.NestAttachments()
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matches := regAttachments.FindAllString(profile, -1)
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if len(matches) > 0 {
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strheader := strings.Replace(matches[0], "@{exec_path}", att, -1)
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return regAttachments.ReplaceAllLiteralString(profile, strheader)
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}
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return profile
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}
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func BuildABI3(profile string) string {
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for _, abi4t3 := range regAbi4To3 {
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profile = abi4t3.Regex.ReplaceAllLiteralString(profile, abi4t3.Repl)
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}
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return profile
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}
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