Add base support for internalizing the SFTP server

config/config.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"fmt"
+	"github.com/mcuadros/go-defaults"
 	"go.uber.org/zap"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
@@ -87,6 +88,24 @@ type SystemConfiguration struct {
 	// "0" as being crashed if the process stopped without any Wings interaction. E.g.
 	// the user did not press the stop button, but the process stopped cleanly.
 	DetectCleanExitAsCrash bool `default:"true" yaml:"detect_clean_exit_as_crash"`
+
+	Sftp *SftpConfiguration `default:"SftpConfiguration" yaml:"sftp"`
+}
+
+// Defines the configuration of the internal SFTP server.
+type SftpConfiguration struct {
+	// If set to false, the internal SFTP server will not be booted and you will need
+	// to run the SFTP server independent of this program.
+	UseInternalSystem bool `default:"true" yaml:"use_internal"`
+	// If set to true disk checking will not be performed. This will prevent the SFTP
+	// server from checking the total size of a directory when uploading files.
+	DisableDiskChecking bool `default:"false" yaml:"disable_disk_checking"`
+	// The bind address of the SFTP server.
+	Address string `default:"0.0.0.0" yaml:"bind_address"`
+	// The bind port of the SFTP server.
+	Port int `default:"2022" yaml:"bind_port"`
+	// If set to true, no write actions will be allowed on the SFTP server.
+	ReadOnly bool `default:"false" yaml:"read_only"`
 }
 
 // Defines the docker configuration used by the daemon when interacting with
@@ -191,8 +210,13 @@ func ReadConfiguration(path string) (*Configuration, error) {
 		return nil, err
 	}
 
-	c := &Configuration{}
+	sftp :=new(SftpConfiguration)
-	c.SetDefaults()
+	defaults.SetDefaults(sftp)
+
+	c := new(Configuration)
+	c.System = new(SystemConfiguration)
+	c.System.Sftp = sftp
+	defaults.SetDefaults(c)
 
 	// Replace environment variables within the configuration file with their
 	// values from the host system.

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a
 	github.com/beevik/etree v1.1.0
-	github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23
+	github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929
 	github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448 // indirect
 	github.com/creasty/defaults v1.3.0
 	github.com/docker/distribution v2.7.1+incompatible // indirect
@@ -37,10 +37,9 @@ require (
 	github.com/opencontainers/image-spec v1.0.1 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.8.0
+	github.com/pterodactyl/sftp-server v1.0.4
 	github.com/remeh/sizedwaitgroup v0.0.0-20180822144253-5e7302b12cce
 	github.com/sirupsen/logrus v1.0.5 // indirect
-	go.uber.org/atomic v1.3.2 // indirect
-	go.uber.org/multierr v1.1.0 // indirect
 	go.uber.org/zap v1.9.1
 	golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392 // indirect
 	golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac // indirect

go.sum

@@ -10,8 +10,11 @@ github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a h1:idn718Q4
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/beevik/etree v1.1.0 h1:T0xke/WvNtMoCqgzPhkX2r4rjY3GDZFi+FjpRZY2Jbs=
 github.com/beevik/etree v1.1.0/go.mod h1:r8Aw8JqVegEf0w2fDnATrX9VpkMcyFeM0FhwO62wh+A=
+github.com/buger/jsonparser v0.0.0-20181023193515-52c6e1462ebd/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23 h1:D21IyuvjDCshj1/qq+pCNd3VZOAEI9jy6Bi131YlXgI=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
+github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929 h1:MW/JDk68Rny52yI0M0N+P8lySNgB+NhpI/uAmhgOhUM=
+github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929/go.mod h1:tgcrVJ81GPSF0mz+0nu1Xaz0fazGPrmmJfJtxjbHhUQ=
 github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448 h1:PUD50EuOMkXVcpBIA/R95d56duJR9VxhwncsFbNnxW4=
 github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448/go.mod h1:ODA38xgv3Kuk8dQz2ZQXpnv/UZZUHUCL7pnLehbXgQI=
 github.com/creasty/defaults v1.3.0 h1:uG+RAxYbJgOPCOdKEcec9ZJXeva7Y6mj/8egdzwmLtw=
@@ -55,6 +58,8 @@ github.com/julienschmidt/httprouter v1.2.0 h1:TDTW5Yz1mjftljbcKqRcrYhd4XeOoI98t+
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
+github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -82,16 +87,22 @@ github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaR
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/sftp v1.8.3 h1:9jSe2SxTM8/3bXZjtqnkgTBW+lA8db0knZJyns7gpBA=
+github.com/pkg/sftp v1.8.3/go.mod h1:NxmoDg/QLVWluQDUYG7XBZTLUpKeFa8e3aMf1BfjyHk=
+github.com/pterodactyl/sftp-server v1.0.4 h1:hPUaUQvA6U/R8/bybQFDMBDcZaqqj+kufGBQZ3esP5M=
+github.com/pterodactyl/sftp-server v1.0.4/go.mod h1:0LKDl+f1qY2TH9+B5jxdROktW0+10UM1qJ472iWbyvQ=
 github.com/remeh/sizedwaitgroup v0.0.0-20180822144253-5e7302b12cce h1:aP+C+YbHZfOQlutA4p4soHi7rVUqHQdWEVMSkHfDTqY=
 github.com/remeh/sizedwaitgroup v0.0.0-20180822144253-5e7302b12cce/go.mod h1:3j2R4OIe/SeS6YDhICBy22RWjJC5eNCJ1V+9+NVNYlo=
 github.com/sirupsen/logrus v1.0.5 h1:8c8b5uO0zS4X6RPl/sd1ENwSkIc0/H2PaHxE3udaE8I=
 github.com/sirupsen/logrus v1.0.5/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
+github.com/uber-go/zap v1.9.1/go.mod h1:GY+83l3yxBcBw2kmHu/sAWwItnTn+ynxHCRo+WiIQOY=
 go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.9.1 h1:XCJQEf3W6eZaVwhRBof6ImoYGJSITeKWsyeh3HFu/5o=
 go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
+golang.org/x/crypto v0.0.0-20181025213731-e84da0312774/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 h1:O5YqonU5IWby+w98jVUG9h7zlCWCcH4RHyPVReBmhzk=
 golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=

sftp/server.go

@@ -0,0 +1,30 @@
+package sftp
+
+import (
+	"github.com/patrickmn/go-cache"
+	sftpserver "github.com/pterodactyl/sftp-server/src/server"
+	"github.com/pterodactyl/wings/config"
+	"path"
+	"time"
+)
+
+func Initialize(config *config.Configuration) error {
+	c := sftpserver.Configuration{
+		Data:  []byte("{}"),
+		Cache: cache.New(5*time.Minute, 10*time.Minute),
+		User: sftpserver.SftpUser{
+			Uid: config.System.User.Uid,
+			Gid: config.System.User.Gid,
+		},
+		Settings: sftpserver.Settings{
+			BasePath:         config.System.Data,
+			ReadOnly:         config.System.Sftp.ReadOnly,
+			BindAddress:      config.System.Sftp.Address,
+			BindPort:         config.System.Sftp.Port,
+			ServerDataFolder: path.Join(config.System.Data, "/servers"),
+			DisableDiskCheck: config.System.Sftp.DisableDiskChecking,
+		},
+	}
+
+	return c.Initalize()
+}

wings.go

@@ -8,9 +8,11 @@ import (
 	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/server"
+	"github.com/pterodactyl/wings/sftp"
 	"github.com/remeh/sizedwaitgroup"
 	"go.uber.org/zap"
 	"net/http"
+	"os"
 )
 
 // Entrypoint for the Wings application. Configures the logger and checks any
@@ -137,6 +139,14 @@ func main() {
 	// Wait until all of the servers are ready to go before we fire up the HTTP server.
 	wg.Wait()
 
+	// If the SFTP subsystem should be started, do so now.
+	if c.System.Sftp.UseInternalSystem {
+		if err := sftp.Initialize(c); err != nil {
+			zap.S().Fatalw("failed to initialize SFTP subsystem", zap.Error(errors.WithStack(err)))
+			os.Exit(1)
+		}
+	}
+
 	r := &Router{
 		Servers: servers,
 		token:   c.AuthenticationToken,