route/server/server.go

249 lines
4.6 KiB
Go

package server
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io/ioutil"
"log"
"net"
"net/http"
"net/rpc"
"os"
"path/filepath"
"strings"
"time"
"git.xeserv.us/xena/route/database"
"git.xeserv.us/xena/route/lib/elfs"
"git.xeserv.us/xena/route/lib/tunnel"
"git.xeserv.us/xena/route/routerpc"
"git.xeserv.us/xena/route/utils"
"github.com/Xe/uuid"
"github.com/Yawning/bulb"
)
// RPC constants
const (
RPCPort uint16 = 39453
)
// Server is the main server type
type Server struct {
cfg *Config
db *database.DB
tor *Tor
rpcS *rpc.Server
rpcAddr string
ts *tunnel.Server
CertCache *database.CertCache
}
// Config configures Server
type Config struct {
ControlHost, ControlKeyFile string
RethinkDBHost, RethinkDBDatabase string
TorDataDir, TorHashedPassword, TorPassword string
WebPort, DomainSuffix, SSLPort string
}
// New creates a new Server
func New(cfg Config) (*Server, error) {
db, err := database.New(cfg.RethinkDBHost, cfg.RethinkDBDatabase)
if err != nil {
return nil, err
}
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
return nil, err
}
t, err := StartTor(TorConfig{
DataDir: cfg.TorDataDir,
HashedControlPassword: cfg.TorHashedPassword,
ClearPassword: cfg.TorPassword,
Timeout: 30 * time.Second,
})
if err != nil {
return nil, err
}
fin, err := os.Open(cfg.ControlKeyFile)
if err != nil {
return nil, err
}
defer fin.Close()
data, err := ioutil.ReadAll(fin)
if err != nil {
return nil, err
}
pKey, err := utils.PemToRSAPrivateKey(data)
if err != nil {
return nil, err
}
_, err = t.AddOnion(pKey, RPCPort, l.Addr().String())
if err != nil {
return nil, err
}
rpcs := rpc.NewServer()
ts, err := tunnel.NewServer(&tunnel.ServerConfig{})
if err != nil {
return nil, err
}
s := &Server{
cfg: &cfg,
db: db,
tor: t,
rpcS: rpcs,
rpcAddr: l.Addr().String(),
ts: ts,
CertCache: &database.CertCache{
DB: db,
},
}
rpcs.RegisterName("Urls", &RPCServer{Server: s})
go rpcs.Accept(l)
err = s.restore()
if err != nil {
return nil, err
}
return s, nil
}
func (s *Server) onionPath(name string) string {
return filepath.Join(s.cfg.TorDataDir, name)
}
func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
r.Header.Del("X-Forwarded-For")
if r.Header.Get("X-Tor2web") != "" {
http.Error(w, "tor2web proxy use is not allowed", 400)
return
}
host, _, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
r.Header.Set("X-Forwarded-For", host)
r.Header.Set("X-Remote-IP", host)
r.Header.Set("X-Request-Ingress", time.Now().String())
rid := uuid.New()
r.Header.Set("X-Request-Id", rid)
w.Header().Set("X-Request-Id", rid)
if strings.HasSuffix(r.Host, ".onion") {
w.Header().Add("DNT", "1")
}
if r.RequestURI == rpc.DefaultRPCPath {
s.rpcS.ServeHTTP(w, r)
return
}
s.ts.ServeHTTP(w, r)
}
func (s *Server) restore() error {
rts, err := s.db.GetAllRoutes()
if err != nil {
return err
}
for _, rt := range rts {
var block *pem.Block
block, _ = pem.Decode([]byte(rt.OnionKey))
pKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return err
}
_, err = s.tor.AddOnion(pKey, 80, "127.0.0.1:"+s.cfg.WebPort)
if err != nil {
return err
}
s.ts.AddHost(rt.Hostname, rt.Token)
s.ts.AddHost(rt.OnionHostname, rt.Token)
log.Printf("added: %s (%s)", rt.Hostname, rt.OnionHostname)
}
return nil
}
func genPortSpec(incoming uint16, outgoing string) bulb.OnionPortSpec {
return bulb.OnionPortSpec{
VirtPort: incoming,
Target: outgoing,
}
}
// RPCServer is a Server wrapped to work inside the context of net/rpc
type RPCServer struct {
*Server
}
// AddHost adds a host to the server.
func (rs *RPCServer) AddHost(req routerpc.AddHostRequest, resp *routerpc.AddHostResponse) error {
if req.APIKey != "hunter2" {
return errors.New("invalid api key")
}
token := uuid.New()
var pKey *rsa.PrivateKey
if kk, ok := req.PrivKey.(*rsa.PrivateKey); ok {
pKey = kk
} else {
return errors.New("there must be a 1024 bit RSA private key")
}
oi, err := rs.tor.AddOnion(pKey, 80, "127.0.0.1:"+rs.cfg.WebPort)
if err != nil {
return err
}
resp.OnionHostname = oi.OnionID + ".onion"
resp.Token = token
resp.PrivKey = pKey
if req.Hostname != "" {
rs.Server.ts.AddHost(req.Hostname, token)
resp.Hostname = req.Hostname
} else {
resp.Hostname = elfs.MakeName() + rs.cfg.DomainSuffix
rs.ts.AddHost(resp.Hostname, token)
}
rs.Server.ts.AddHost(resp.OnionHostname, token)
err = rs.db.SaveRoute(resp)
if err != nil {
return err
}
return nil
}