63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
/*
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Copyright 2020 The Kruise Authors.
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Copyright 2018 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 generator
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/pem"
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"time"
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)
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// ValidCACert think cert and key are valid if they meet the following requirements:
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// - key and cert are valid pair
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// - caCert is the root ca of cert
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// - cert is for dnsName
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// - cert won't expire before time
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func ValidCACert(key, cert, caCert []byte, dnsName string, time time.Time) bool {
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if len(key) == 0 || len(cert) == 0 || len(caCert) == 0 {
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return false
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}
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// Verify key and cert are valid pair
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_, err := tls.X509KeyPair(cert, key)
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if err != nil {
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return false
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}
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// Verify cert is valid for at least 1 year.
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pool := x509.NewCertPool()
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if !pool.AppendCertsFromPEM(caCert) {
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return false
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}
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block, _ := pem.Decode(cert)
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if block == nil {
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return false
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}
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c, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return false
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}
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ops := x509.VerifyOptions{
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DNSName: dnsName,
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Roots: pool,
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CurrentTime: time,
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}
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_, err = c.Verify(ops)
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return err == nil
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}
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