mirror of
https://github.com/kubernetes-sigs/kustomize.git
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77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
// Copyright 2019 The Kubernetes Authors.
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// SPDX-License-Identifier: Apache-2.0
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package loader
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import (
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"fmt"
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"github.com/spf13/pflag"
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"sigs.k8s.io/kustomize/v3/api/filesys"
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)
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//go:generate stringer -type=loadRestrictions
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type loadRestrictions int
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const (
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unknown loadRestrictions = iota
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rootOnly
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none
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)
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const (
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flagName = "load_restrictor"
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)
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var (
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flagValue = rootOnly.String()
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flagHelp = "if set to '" + none.String() +
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"', local kustomizations may load files from outside their root. " +
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"This does, however, break the relocatability of the kustomization."
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)
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func AddFlagLoadRestrictor(set *pflag.FlagSet) {
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set.StringVar(
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&flagValue, flagName,
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rootOnly.String(), flagHelp)
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}
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func ValidateFlagLoadRestrictor() (LoadRestrictorFunc, error) {
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switch flagValue {
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case rootOnly.String():
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return RestrictionRootOnly, nil
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case none.String():
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return RestrictionNone, nil
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default:
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return nil, fmt.Errorf(
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"illegal flag value --%s %s; legal values: %v",
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flagName, flagValue,
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[]string{rootOnly.String(), none.String()})
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}
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}
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type LoadRestrictorFunc func(
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filesys.FileSystem, filesys.ConfirmedDir, string) (string, error)
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func RestrictionRootOnly(
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fSys filesys.FileSystem, root filesys.ConfirmedDir, path string) (string, error) {
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d, f, err := fSys.CleanedAbs(path)
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if err != nil {
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return "", err
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}
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if f == "" {
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return "", fmt.Errorf("'%s' must be a file", path)
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}
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if !d.HasPrefix(root) {
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return "", fmt.Errorf(
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"security; file '%s' is not in or below '%s'",
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path, root)
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}
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return d.Join(f), nil
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}
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func RestrictionNone(
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_ filesys.FileSystem, _ filesys.ConfirmedDir, path string) (string, error) {
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return path, nil
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}
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