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tlsutil.go
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tlsutil.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 tlsutil
import (
"crypto/tls"
"crypto/x509"
"encoding/pem"
"github.com/apache/servicecomb-service-center/pkg/log"
"github.com/apache/servicecomb-service-center/pkg/util"
"io/ioutil"
"strings"
)
func ParseSSLCipherSuites(ciphers string, permitTLSCipherSuiteMap map[string]uint16) []uint16 {
if len(ciphers) == 0 || len(permitTLSCipherSuiteMap) == 0 {
return nil
}
cipherSuiteList := make([]uint16, 0)
cipherSuiteNameList := strings.Split(ciphers, ",")
for _, cipherSuiteName := range cipherSuiteNameList {
cipherSuiteName = strings.TrimSpace(cipherSuiteName)
if len(cipherSuiteName) == 0 {
continue
}
if cipherSuite, ok := permitTLSCipherSuiteMap[cipherSuiteName]; ok {
cipherSuiteList = append(cipherSuiteList, cipherSuite)
} else {
// 配置算法不存在
log.Warnf("cipher %s not exist.", cipherSuiteName)
}
}
return cipherSuiteList
}
func ParseDefaultSSLCipherSuites(ciphers string) []uint16 {
return ParseSSLCipherSuites(ciphers, TLSCipherSuiteMap)
}
func ParseSSLProtocol(sprotocol string) uint16 {
var result uint16 = tls.VersionTLS12
if protocol, ok := TLSVersionMap[sprotocol]; ok {
result = protocol
} else {
log.Warnf("invalid ssl minimal version(%s), use default.", sprotocol)
}
return result
}
func GetX509CACertPool(caCertFile string) (caCertPool *x509.CertPool, err error) {
pool := x509.NewCertPool()
caCert, err := ioutil.ReadFile(caCertFile)
if err != nil {
log.Errorf(err, "read ca cert file %s failed.", caCertFile)
return nil, err
}
pool.AppendCertsFromPEM(caCert)
return pool, nil
}
func LoadTLSCertificate(certFile, keyFile, plainPassphase string) (tlsCert []tls.Certificate, err error) {
certContent, err := ioutil.ReadFile(certFile)
if err != nil {
log.Errorf(err, "read cert file %s failed.", certFile)
return nil, err
}
keyContent, err := ioutil.ReadFile(keyFile)
if err != nil {
log.Errorf(err, "read key file %s failed.", keyFile)
return nil, err
}
keyBlock, _ := pem.Decode(keyContent)
if keyBlock == nil {
log.Errorf(err, "decode key file %s failed.", keyFile)
return nil, err
}
if x509.IsEncryptedPEMBlock(keyBlock) {
plainPassphaseBytes := util.StringToBytesWithNoCopy(plainPassphase)
keyData, err := x509.DecryptPEMBlock(keyBlock, plainPassphaseBytes)
if err != nil {
log.Errorf(err, "decrypt key file %s failed.", keyFile)
return nil, err
}
// 解密成功,重新编码为PEM格式的文件
plainKeyBlock := &pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: keyData,
}
keyContent = pem.EncodeToMemory(plainKeyBlock)
}
cert, err := tls.X509KeyPair(certContent, keyContent)
if err != nil {
log.Errorf(err, "load X509 key pair from cert file %s with key file %s failed.", certFile, keyFile)
return nil, err
}
var certs []tls.Certificate
certs = append(certs, cert)
return certs, nil
}
/**
verifyPeer Whether verify client
supplyCert Whether send certificate
verifyCN Whether verify CommonName
*/
func GetClientTLSConfig(opts ...SSLConfigOption) (tlsConfig *tls.Config, err error) {
cfg := toSSLConfig(opts...)
var pool *x509.CertPool = nil
var certs []tls.Certificate
if cfg.VerifyPeer {
pool, err = GetX509CACertPool(cfg.CACertFile)
if err != nil {
return nil, err
}
}
if len(cfg.CertFile) > 0 {
certs, err = LoadTLSCertificate(cfg.CertFile, cfg.KeyFile, cfg.KeyPassphase)
if err != nil {
return nil, err
}
}
tlsConfig = &tls.Config{
RootCAs: pool,
Certificates: certs,
CipherSuites: cfg.CipherSuites,
InsecureSkipVerify: !cfg.VerifyPeer || !cfg.VerifyHostName,
MinVersion: cfg.MinVersion,
MaxVersion: cfg.MaxVersion,
}
return tlsConfig, nil
}
func GetServerTLSConfig(opts ...SSLConfigOption) (tlsConfig *tls.Config, err error) {
cfg := toSSLConfig(opts...)
clientAuthMode := tls.NoClientCert
var pool *x509.CertPool = nil
if cfg.VerifyPeer {
pool, err = GetX509CACertPool(cfg.CACertFile)
if err != nil {
return nil, err
}
clientAuthMode = tls.RequireAndVerifyClientCert
}
var certs []tls.Certificate
if len(cfg.CertFile) > 0 {
certs, err = LoadTLSCertificate(cfg.CertFile, cfg.KeyFile, cfg.KeyPassphase)
if err != nil {
return nil, err
}
}
tlsConfig = &tls.Config{
ClientCAs: pool,
Certificates: certs,
CipherSuites: cfg.CipherSuites,
CurvePreferences: []tls.CurveID{tls.X25519, tls.CurveP256},
PreferServerCipherSuites: true,
ClientAuth: clientAuthMode,
MinVersion: cfg.MinVersion,
MaxVersion: cfg.MaxVersion,
NextProtos: []string{"h2", "http/1.1"},
}
return tlsConfig, nil
}