mirror of
https://github.com/fatedier/frp.git
synced 2024-12-13 18:21:14 +01:00
133 lines
2.9 KiB
Go
133 lines
2.9 KiB
Go
// Copyright 2023 The frp Authors
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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 transport
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"encoding/pem"
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"math/big"
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"os"
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)
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func newCustomTLSKeyPair(certfile, keyfile string) (*tls.Certificate, error) {
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tlsCert, err := tls.LoadX509KeyPair(certfile, keyfile)
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if err != nil {
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return nil, err
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}
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return &tlsCert, nil
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}
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func newRandomTLSKeyPair() *tls.Certificate {
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key, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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panic(err)
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}
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template := x509.Certificate{SerialNumber: big.NewInt(1)}
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certDER, err := x509.CreateCertificate(
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rand.Reader,
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&template,
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&template,
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&key.PublicKey,
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key)
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if err != nil {
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panic(err)
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}
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keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
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certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
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tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
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if err != nil {
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panic(err)
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}
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return &tlsCert
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}
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// Only support one ca file to add
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func newCertPool(caPath string) (*x509.CertPool, error) {
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pool := x509.NewCertPool()
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caCrt, err := os.ReadFile(caPath)
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if err != nil {
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return nil, err
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}
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pool.AppendCertsFromPEM(caCrt)
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return pool, nil
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}
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func NewServerTLSConfig(certPath, keyPath, caPath string) (*tls.Config, error) {
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base := &tls.Config{}
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if certPath == "" || keyPath == "" {
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// server will generate tls conf by itself
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cert := newRandomTLSKeyPair()
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base.Certificates = []tls.Certificate{*cert}
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} else {
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cert, err := newCustomTLSKeyPair(certPath, keyPath)
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if err != nil {
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return nil, err
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}
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base.Certificates = []tls.Certificate{*cert}
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}
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if caPath != "" {
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pool, err := newCertPool(caPath)
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if err != nil {
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return nil, err
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}
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base.ClientAuth = tls.RequireAndVerifyClientCert
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base.ClientCAs = pool
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}
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return base, nil
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}
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func NewClientTLSConfig(certPath, keyPath, caPath, serverName string) (*tls.Config, error) {
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base := &tls.Config{}
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if certPath == "" || keyPath == "" {
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// client will not generate tls conf by itself
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} else {
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cert, err := newCustomTLSKeyPair(certPath, keyPath)
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if err != nil {
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return nil, err
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}
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base.Certificates = []tls.Certificate{*cert}
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}
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base.ServerName = serverName
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if caPath != "" {
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pool, err := newCertPool(caPath)
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if err != nil {
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return nil, err
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}
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base.RootCAs = pool
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base.InsecureSkipVerify = false
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} else {
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base.InsecureSkipVerify = true
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}
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return base, nil
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}
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