mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2024-12-14 11:57:51 +00:00
f9b4ba87a8
Deny deprecated TLS versions (1.0 and 1.1). We don't really excpect other clients than NFD itself so we can just request the latest version.
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
/*
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Copyright 2021 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 utils
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"io/ioutil"
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"sync"
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)
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// TlsConfig is a TLS config wrapper/helper for cert rotation
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type TlsConfig struct {
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sync.Mutex
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config *tls.Config
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}
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// GetConfig returns the current TLS configuration. Intended to be used as the
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// GetConfigForClient callback in tls.Config.
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func (c *TlsConfig) GetConfig(*tls.ClientHelloInfo) (*tls.Config, error) {
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c.Lock()
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defer c.Unlock()
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return c.config, nil
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}
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// UpdateConfig updates the wrapped TLS config
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func (c *TlsConfig) UpdateConfig(certFile, keyFile, caFile string) error {
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c.Lock()
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defer c.Unlock()
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// Load cert for authenticating this server
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cert, err := tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return fmt.Errorf("failed to load server certificate: %v", err)
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}
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// Load CA cert for client cert verification
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caCert, err := ioutil.ReadFile(caFile)
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if err != nil {
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return fmt.Errorf("failed to read root certificate file: %v", err)
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}
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caPool := x509.NewCertPool()
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if ok := caPool.AppendCertsFromPEM(caCert); !ok {
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return fmt.Errorf("failed to add certificate from '%s'", caFile)
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}
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// Create TLS config
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c.config = &tls.Config{
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Certificates: []tls.Certificate{cert},
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ClientCAs: caPool,
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ClientAuth: tls.RequireAndVerifyClientCert,
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GetConfigForClient: c.GetConfig,
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MinVersion: tls.VersionTLS13,
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}
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return nil
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}
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