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89 lines
2.4 KiB
89 lines
2.4 KiB
// Copyright © 2023 OpenIM. All rights reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package tls
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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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"errors"
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"os"
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"github.com/OpenIMSDK/tools/errs"
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)
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// decryptPEM decrypts a PEM block using a password.
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func decryptPEM(data []byte, passphrase []byte) ([]byte, error) {
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if len(passphrase) == 0 {
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return data, nil
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}
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b, _ := pem.Decode(data)
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d, err := x509.DecryptPEMBlock(b, passphrase)
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if err != nil {
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return nil, err
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}
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return pem.EncodeToMemory(&pem.Block{
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Type: b.Type,
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Bytes: d,
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}), nil
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}
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func readEncryptablePEMBlock(path string, pwd []byte) ([]byte, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, err
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}
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return decryptPEM(data, pwd)
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}
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// NewTLSConfig setup the TLS config from general config file.
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func NewTLSConfig(clientCertFile, clientKeyFile, caCertFile string, keyPwd []byte, insecureSkipVerify bool) (*tls.Config, error) {
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tlsConfig := tls.Config{}
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if clientCertFile != "" && clientKeyFile != "" {
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certPEMBlock, err := os.ReadFile(clientCertFile)
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if err != nil {
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return nil, errs.Wrap(err, "NewTLSConfig: failed to read client cert file")
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}
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keyPEMBlock, err := readEncryptablePEMBlock(clientKeyFile, keyPwd)
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if err != nil {
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return nil, err
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}
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cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
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if err != nil {
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return nil, errs.Wrap(err, "NewTLSConfig: failed to create X509 key pair")
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}
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tlsConfig.Certificates = []tls.Certificate{cert}
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}
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if caCertFile != "" {
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caCert, err := os.ReadFile(caCertFile)
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if err != nil {
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return nil, errs.Wrap(err, "NewTLSConfig: failed to read CA cert file")
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}
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caCertPool := x509.NewCertPool()
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if ok := caCertPool.AppendCertsFromPEM(caCert); !ok {
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return nil, errors.New("NewTLSConfig: not a valid CA cert")
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}
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tlsConfig.RootCAs = caCertPool
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}
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tlsConfig.InsecureSkipVerify = insecureSkipVerify
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return &tlsConfig, nil
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}
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