github.com/openimsdk/tools@v0.0.49/mq/kafka/tls.go (about)

     1  // Copyright © 2024 OpenIM open source community. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kafka
    16  
    17  import (
    18  	"crypto/tls"
    19  	"crypto/x509"
    20  	"encoding/pem"
    21  	"os"
    22  
    23  	"github.com/openimsdk/tools/errs"
    24  )
    25  
    26  // decryptPEM decrypts a PEM block using a password.
    27  func decryptPEM(data []byte, passphrase []byte) ([]byte, error) {
    28  	if len(passphrase) == 0 {
    29  		return data, nil
    30  	}
    31  	b, _ := pem.Decode(data)
    32  	d, err := x509.DecryptPEMBlock(b, passphrase)
    33  	if err != nil {
    34  		return nil, errs.WrapMsg(err, "DecryptPEMBlock failed")
    35  	}
    36  	return pem.EncodeToMemory(&pem.Block{
    37  		Type:  b.Type,
    38  		Bytes: d,
    39  	}), nil
    40  }
    41  
    42  func readEncryptablePEMBlock(path string, pwd []byte) ([]byte, error) {
    43  	data, err := os.ReadFile(path)
    44  	if err != nil {
    45  		return nil, errs.WrapMsg(err, "ReadFile failed", "path", path)
    46  	}
    47  	return decryptPEM(data, pwd)
    48  }
    49  
    50  // newTLSConfig setup the TLS config from general config file.
    51  func newTLSConfig(clientCertFile, clientKeyFile, caCertFile string, keyPwd []byte, insecureSkipVerify bool) (*tls.Config, error) {
    52  	var tlsConfig tls.Config
    53  	if clientCertFile != "" && clientKeyFile != "" {
    54  		certPEMBlock, err := os.ReadFile(clientCertFile)
    55  		if err != nil {
    56  			return nil, errs.WrapMsg(err, "ReadFile failed", "clientCertFile", clientCertFile)
    57  		}
    58  		keyPEMBlock, err := readEncryptablePEMBlock(clientKeyFile, keyPwd)
    59  		if err != nil {
    60  			return nil, err
    61  		}
    62  
    63  		cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
    64  		if err != nil {
    65  			return nil, errs.WrapMsg(err, "X509KeyPair failed")
    66  		}
    67  		tlsConfig.Certificates = []tls.Certificate{cert}
    68  	}
    69  
    70  	if caCertFile != "" {
    71  		caCert, err := os.ReadFile(caCertFile)
    72  		if err != nil {
    73  			return nil, errs.WrapMsg(err, "ReadFile failed", "caCertFile", caCertFile)
    74  		}
    75  		caCertPool := x509.NewCertPool()
    76  		if ok := caCertPool.AppendCertsFromPEM(caCert); !ok {
    77  			return nil, errs.New("AppendCertsFromPEM failed")
    78  		}
    79  		tlsConfig.RootCAs = caCertPool
    80  	}
    81  	tlsConfig.InsecureSkipVerify = insecureSkipVerify
    82  	return &tlsConfig, nil
    83  }