5110db5087
Users must not be allowed to step outside the volume with subPath. Therefore the final subPath directory must be "locked" somehow and checked if it's inside volume. On Windows, we lock the directories. On Linux, we bind-mount the final subPath into /var/lib/kubelet/pods/<uid>/volume-subpaths/<container name>/<subPathName>, it can't be changed to symlink user once it's bind-mounted.
61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"fmt"
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"net/url"
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"path/filepath"
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"strings"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// FromApiserverCache modifies <opts> so that the GET request will
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// be served from apiserver cache instead of from etcd.
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func FromApiserverCache(opts *metav1.GetOptions) {
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opts.ResourceVersion = "0"
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}
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func parseEndpoint(endpoint string) (string, string, error) {
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u, err := url.Parse(endpoint)
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if err != nil {
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return "", "", err
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}
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if u.Scheme == "tcp" {
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return "tcp", u.Host, nil
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} else if u.Scheme == "unix" {
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return "unix", u.Path, nil
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} else if u.Scheme == "" {
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return "", "", fmt.Errorf("Using %q as endpoint is deprecated, please consider using full url format", endpoint)
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} else {
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return u.Scheme, "", fmt.Errorf("protocol %q not supported", u.Scheme)
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}
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}
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func pathWithinBase(fullPath, basePath string) bool {
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rel, err := filepath.Rel(basePath, fullPath)
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if err != nil {
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return false
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}
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if strings.HasPrefix(rel, "..") {
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return false
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}
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return true
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}
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