ceph-csi/vendor/k8s.io/apiserver/pkg/util/webhook/validation.go
Madhu Rajanna 5a66991bb3 rebase: update kubernetes to latest
updating the kubernetes release to the
latest in main go.mod

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
2024-08-20 08:17:01 +00:00

116 lines
3.8 KiB
Go

/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package webhook
import (
"fmt"
"net/url"
"strings"
"k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/client-go/transport"
)
func ValidateCABundle(fldPath *field.Path, caBundle []byte) field.ErrorList {
var allErrors field.ErrorList
_, err := transport.TLSConfigFor(&transport.Config{TLS: transport.TLSConfig{CAData: caBundle}})
if err != nil {
allErrors = append(allErrors, field.Invalid(fldPath, caBundle, err.Error()))
}
return allErrors
}
// ValidateWebhookURL validates webhook's URL.
func ValidateWebhookURL(fldPath *field.Path, URL string, forceHttps bool) field.ErrorList {
var allErrors field.ErrorList
const form = "; desired format: https://host[/path]"
if u, err := url.Parse(URL); err != nil {
allErrors = append(allErrors, field.Required(fldPath, "url must be a valid URL: "+err.Error()+form))
} else {
if forceHttps && u.Scheme != "https" {
allErrors = append(allErrors, field.Invalid(fldPath, u.Scheme, "'https' is the only allowed URL scheme"+form))
}
if len(u.Host) == 0 {
allErrors = append(allErrors, field.Invalid(fldPath, u.Host, "host must be specified"+form))
}
if u.User != nil {
allErrors = append(allErrors, field.Invalid(fldPath, u.User.String(), "user information is not permitted in the URL"))
}
if len(u.Fragment) != 0 {
allErrors = append(allErrors, field.Invalid(fldPath, u.Fragment, "fragments are not permitted in the URL"))
}
if len(u.RawQuery) != 0 {
allErrors = append(allErrors, field.Invalid(fldPath, u.RawQuery, "query parameters are not permitted in the URL"))
}
}
return allErrors
}
func ValidateWebhookService(fldPath *field.Path, namespace, name string, path *string, port int32) field.ErrorList {
var allErrors field.ErrorList
if len(name) == 0 {
allErrors = append(allErrors, field.Required(fldPath.Child("name"), "service name is required"))
}
if len(namespace) == 0 {
allErrors = append(allErrors, field.Required(fldPath.Child("namespace"), "service namespace is required"))
}
if errs := validation.IsValidPortNum(int(port)); errs != nil {
allErrors = append(allErrors, field.Invalid(fldPath.Child("port"), port, "port is not valid: "+strings.Join(errs, ", ")))
}
if path == nil {
return allErrors
}
// TODO: replace below with url.Parse + verifying that host is empty?
urlPath := *path
if urlPath == "/" || len(urlPath) == 0 {
return allErrors
}
if urlPath == "//" {
allErrors = append(allErrors, field.Invalid(fldPath.Child("path"), urlPath, "segment[0] may not be empty"))
return allErrors
}
if !strings.HasPrefix(urlPath, "/") {
allErrors = append(allErrors, field.Invalid(fldPath.Child("path"), urlPath, "must start with a '/'"))
}
urlPathToCheck := urlPath[1:]
if strings.HasSuffix(urlPathToCheck, "/") {
urlPathToCheck = urlPathToCheck[:len(urlPathToCheck)-1]
}
steps := strings.Split(urlPathToCheck, "/")
for i, step := range steps {
if len(step) == 0 {
allErrors = append(allErrors, field.Invalid(fldPath.Child("path"), urlPath, fmt.Sprintf("segment[%d] may not be empty", i)))
continue
}
failures := validation.IsDNS1123Subdomain(step)
for _, failure := range failures {
allErrors = append(allErrors, field.Invalid(fldPath.Child("path"), urlPath, fmt.Sprintf("segment[%d]: %v", i, failure)))
}
}
return allErrors
}