kubernetes util 源码
kubernetes util 代码
文件路径：/staging/src/k8s.io/apiserver/pkg/server/dynamiccertificates/util.go
/*
Copyright 2019 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 dynamiccertificates
import (
"crypto/x509"
"fmt"
"strings"
"time"
)
// GetHumanCertDetail is a convenient method for printing compact details of certificate that helps when debugging
// kube-apiserver usage of certs.
func GetHumanCertDetail(certificate *x509.Certificate) string {
humanName := certificate.Subject.CommonName
signerHumanName := certificate.Issuer.CommonName
if certificate.Subject.CommonName == certificate.Issuer.CommonName {
signerHumanName = "<self>"
}
usages := []string{}
for _, curr := range certificate.ExtKeyUsage {
if curr == x509.ExtKeyUsageClientAuth {
usages = append(usages, "client")
continue
}
if curr == x509.ExtKeyUsageServerAuth {
usages = append(usages, "serving")
continue
}
usages = append(usages, fmt.Sprintf("%d", curr))
}
validServingNames := []string{}
for _, ip := range certificate.IPAddresses {
validServingNames = append(validServingNames, ip.String())
}
validServingNames = append(validServingNames, certificate.DNSNames...)
servingString := ""
if len(validServingNames) > 0 {
servingString = fmt.Sprintf(" validServingFor=[%s]", strings.Join(validServingNames, ","))
}
groupString := ""
if len(certificate.Subject.Organization) > 0 {
groupString = fmt.Sprintf(" groups=[%s]", strings.Join(certificate.Subject.Organization, ","))
}
return fmt.Sprintf("%q [%s]%s%s issuer=%q (%v to %v (now=%v))", humanName, strings.Join(usages, ","), groupString, servingString, signerHumanName, certificate.NotBefore.UTC(), certificate.NotAfter.UTC(),
time.Now().UTC())
}
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