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Open-IM-Server/pkg/common/tls/tls.go

89 lines
2.4 KiB

// Copyright © 2023 OpenIM. All rights reserved.
//
// 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 tls
import (
"crypto/tls"
"crypto/x509"
"encoding/pem"
"errors"
"os"
"github.com/OpenIMSDK/tools/errs"
)
// decryptPEM decrypts a PEM block using a password.
func decryptPEM(data []byte, passphrase []byte) ([]byte, error) {
if len(passphrase) == 0 {
return data, nil
}
b, _ := pem.Decode(data)
d, err := x509.DecryptPEMBlock(b, passphrase)
if err != nil {
return nil, err
}
return pem.EncodeToMemory(&pem.Block{
Type: b.Type,
Bytes: d,
}), nil
}
func readEncryptablePEMBlock(path string, pwd []byte) ([]byte, error) {
data, err := os.ReadFile(path)
if err != nil {
return nil, err
}
return decryptPEM(data, pwd)
}
// NewTLSConfig setup the TLS config from general config file.
func NewTLSConfig(clientCertFile, clientKeyFile, caCertFile string, keyPwd []byte, insecureSkipVerify bool) (*tls.Config, error) {
tlsConfig := tls.Config{}
if clientCertFile != "" && clientKeyFile != "" {
certPEMBlock, err := os.ReadFile(clientCertFile)
if err != nil {
return nil, errs.Wrap(err, "NewTLSConfig: failed to read client cert file")
}
keyPEMBlock, err := readEncryptablePEMBlock(clientKeyFile, keyPwd)
if err != nil {
return nil, err
}
cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
if err != nil {
return nil, errs.Wrap(err, "NewTLSConfig: failed to create X509 key pair")
}
tlsConfig.Certificates = []tls.Certificate{cert}
}
if caCertFile != "" {
caCert, err := os.ReadFile(caCertFile)
if err != nil {
return nil, errs.Wrap(err, "NewTLSConfig: failed to read CA cert file")
}
caCertPool := x509.NewCertPool()
if ok := caCertPool.AppendCertsFromPEM(caCert); !ok {
return nil, errors.New("NewTLSConfig: not a valid CA cert")
}
tlsConfig.RootCAs = caCertPool
}
tlsConfig.InsecureSkipVerify = insecureSkipVerify
return &tlsConfig, nil
}