mirror of https://github.com/jlelse/GoBlog
122 lines
3.0 KiB
Go
122 lines
3.0 KiB
Go
package main
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import (
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"context"
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"crypto"
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"crypto/ed25519"
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"crypto/x509"
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"encoding/pem"
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"log"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"time"
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"github.com/cretz/bine/tor"
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"github.com/go-chi/chi/v5/middleware"
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)
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const torUsedKey contextKey = "tor"
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func (a *goBlog) startOnionService(h http.Handler) error {
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torDataPath, err := filepath.Abs("data/tor")
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if err != nil {
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return err
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}
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err = os.MkdirAll(torDataPath, 0777)
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if err != nil {
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return err
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}
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// Initialize private key
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torKey, err := a.createTorPrivateKey(torDataPath)
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if err != nil {
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return err
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}
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// Start tor
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log.Println("Starting and registering onion service, please wait a couple of minutes...")
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t, err := tor.Start(context.Background(), &tor.StartConf{
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TempDataDirBase: os.TempDir(),
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NoAutoSocksPort: true,
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ExtraArgs: a.torExtraArgs(),
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})
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if err != nil {
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return err
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}
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defer func() {
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_ = t.Close()
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}()
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// Wait at most a few minutes to publish the service
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listenCtx, listenCancel := context.WithTimeout(context.Background(), 3*time.Minute)
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defer listenCancel()
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// Create a v3 onion service to listen on any port but show as 80
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onion, err := t.Listen(listenCtx, &tor.ListenConf{
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Key: torKey,
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RemotePorts: []int{80},
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NonAnonymous: a.cfg.Server.TorSingleHop,
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})
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if err != nil {
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return err
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}
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defer func() {
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_ = onion.Close()
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}()
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a.torAddress = "http://" + onion.String()
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torUrl, _ := url.Parse(a.torAddress)
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a.torHostname = torUrl.Hostname()
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log.Println("Onion service published on " + a.torAddress)
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// Clear cache
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a.cache.purge()
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// Serve handler
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s := &http.Server{
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Handler: middleware.WithValue(torUsedKey, true)(h),
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ReadHeaderTimeout: 1 * time.Minute,
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ReadTimeout: 5 * time.Minute,
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WriteTimeout: 5 * time.Minute,
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}
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a.shutdown.Add(shutdownServer(s, "tor"))
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if err = s.Serve(onion); err != nil && err != http.ErrServerClosed {
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return err
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}
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return nil
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}
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func (*goBlog) createTorPrivateKey(torDataPath string) (crypto.PrivateKey, error) {
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torKeyPath := filepath.Join(torDataPath, "onion.pk")
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var torKey crypto.PrivateKey
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if _, err := os.Stat(torKeyPath); os.IsNotExist(err) {
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// Tor private key not found, create it
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_, torKey, err = ed25519.GenerateKey(nil)
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if err != nil {
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return nil, err
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}
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x509Encoded, err := x509.MarshalPKCS8PrivateKey(torKey)
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if err != nil {
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return nil, err
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}
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pemEncoded := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: x509Encoded})
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err = os.WriteFile(torKeyPath, pemEncoded, 0600)
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if err != nil {
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return nil, err
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}
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} else {
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// Tor private key found, load it
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d, _ := os.ReadFile(torKeyPath)
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block, _ := pem.Decode(d)
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x509Encoded := block.Bytes
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torKey, err = x509.ParsePKCS8PrivateKey(x509Encoded)
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if err != nil {
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return nil, err
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}
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}
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return torKey, nil
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}
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func (a *goBlog) torExtraArgs() []string {
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s := []string{"--SocksPort", "0"}
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if a.cfg.Server.TorSingleHop {
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s = append(s, "--HiddenServiceNonAnonymousMode", "1", "--HiddenServiceSingleHopMode", "1")
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}
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return s
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}
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