complete tight png

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

encoding.go

@@ -4,6 +4,11 @@ import (
 	"bytes"
 	"encoding/binary"
 	"fmt"
+	"image"
+	"image/color"
+	"image/draw"
+	"image/png"
+	"io"
 )
 
 // EncodingType represents a known VNC encoding type.
@@ -24,26 +29,292 @@ const (
 	EncUltra2                        EncodingType = 10
 	EncJPEG                          EncodingType = 21
 	EncJRLE                          EncodingType = 22
-	//EncRichCursor        EncodingType = 0xFFFFFF11
-	//EncPointerPos        EncodingType = 0xFFFFFF18
-	//EncLastRec           EncodingType = 0xFFFFFF20
 	EncTRLE                          EncodingType = 15
 	EncZRLE                          EncodingType = 16
+	EncJPEGQualityLevelPseudo10      EncodingType = -23
+	EncJPEGQualityLevelPseudo9       EncodingType = -24
+	EncJPEGQualityLevelPseudo8       EncodingType = -25
+	EncJPEGQualityLevelPseudo7       EncodingType = -26
+	EncJPEGQualityLevelPseudo6       EncodingType = -27
+	EncJPEGQualityLevelPseudo5       EncodingType = -28
+	EncJPEGQualityLevelPseudo4       EncodingType = -29
+	EncJPEGQualityLevelPseudo3       EncodingType = -30
+	EncJPEGQualityLevelPseudo2       EncodingType = -31
+	EncJPEGQualityLevelPseudo1       EncodingType = -32
 	EncColorPseudo                   EncodingType = -239
 	EncDesktopSizePseudo             EncodingType = -223
+	EncLastRectPseudo                EncodingType = -224
+	EncCompressionLevel10            EncodingType = -247
+	EncCompressionLevel9             EncodingType = -248
+	EncCompressionLevel8             EncodingType = -249
+	EncCompressionLevel7             EncodingType = -250
+	EncCompressionLevel6             EncodingType = -251
+	EncCompressionLevel5             EncodingType = -252
+	EncCompressionLevel4             EncodingType = -253
+	EncCompressionLevel3             EncodingType = -254
+	EncCompressionLevel2             EncodingType = -255
+	EncCompressionLevel1             EncodingType = -256
+	EncQEMUPointerMotionChangePseudo EncodingType = -257
+	EncQEMUExtendedKeyEventPseudo    EncodingType = -258
+	EncTightPng                      EncodingType = -260
+	EncExtendedDesktopSizePseudo     EncodingType = -308
+	EncXvpPseudo                     EncodingType = -309
+	EncFencePseudo                   EncodingType = -312
+	EncContinuousUpdatesPseudo       EncodingType = -313
 	EncClientRedirect                EncodingType = -311
 )
 
+//go:generate stringer -type=TightCompression
+
+type TightCompression uint8
+
+const (
+	TightCompressionBasic TightCompression = 0
+	TightCompressionFill  TightCompression = 8
+	TightCompressionJPEG  TightCompression = 9
+	TightCompressionPNG   TightCompression = 10
+)
+
+//go:generate stringer -type=TightFilter
+
+type TightFilter uint8
+
+const (
+	TightFilterCopy     TightFilter = 0
+	TightFilterPalette  TightFilter = 1
+	TightFilterGradient TightFilter = 2
+)
+
 type Encoding interface {
 	Type() EncodingType
 	Read(Conn, *Rectangle) error
 	Write(Conn, *Rectangle) error
 }
 
+type CopyRectEncoding struct {
+	SX, SY uint16
+}
+
+func (CopyRectEncoding) Type() EncodingType { return EncCopyRect }
+
+func (enc *CopyRectEncoding) Read(c Conn, rect *Rectangle) error {
+	if err := binary.Read(c, binary.BigEndian, &enc.SX); err != nil {
+		return err
+	}
+	if err := binary.Read(c, binary.BigEndian, &enc.SY); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (enc *CopyRectEncoding) Write(c Conn, rect *Rectangle) error {
+	if err := binary.Write(c, binary.BigEndian, enc.SX); err != nil {
+		return err
+	}
+	if err := binary.Write(c, binary.BigEndian, enc.SY); err != nil {
+		return err
+	}
+	return nil
+}
+
 type RawEncoding struct {
 	Colors []Color
 }
 
+type TightEncoding struct{}
+
+func (*TightEncoding) Type() EncodingType { return EncTight }
+
+func (enc *TightEncoding) Write(c Conn, rect *Rectangle) error {
+	return nil
+}
+
+func (enc *TightEncoding) Read(c Conn, rect *Rectangle) error {
+	return nil
+}
+
+type TightCC struct {
+	Compression TightCompression
+	Filter      TightFilter
+}
+
+func readTightCC(c Conn) (*TightCC, error) {
+	var ccb uint8 // compression control byte
+	if err := binary.Read(c, binary.BigEndian, &ccb); err != nil {
+		return nil, err
+	}
+	cmp := TightCompression(ccb >> 4)
+	switch cmp {
+	case TightCompressionBasic:
+		return &TightCC{TightCompressionBasic, TightFilterCopy}, nil
+	case TightCompressionFill:
+		return &TightCC{TightCompressionFill, TightFilterCopy}, nil
+	case TightCompressionPNG:
+		return &TightCC{TightCompressionPNG, TightFilterCopy}, nil
+	}
+	return nil, fmt.Errorf("unknown tight compression %d", cmp)
+}
+
+func setBit(n uint8, pos uint8) uint8 {
+	n |= (1 << pos)
+	return n
+}
+
+func clrBit(n uint8, pos uint8) uint8 {
+	n = n &^ (1 << pos)
+	return n
+}
+
+func hasBit(n uint8, pos uint8) bool {
+	v := n & (1 << pos)
+	return (v > 0)
+}
+
+func getBit(n uint8, pos uint8) uint8 {
+	n = n & (1 << pos)
+	return n
+}
+
+func writeTightCC(c Conn, tcc *TightCC) error {
+	var ccb uint8 // compression control byte
+	switch tcc.Compression {
+	case TightCompressionFill:
+		ccb = setBit(ccb, 7)
+	case TightCompressionJPEG:
+		ccb = setBit(ccb, 7)
+		ccb = setBit(ccb, 4)
+	case TightCompressionPNG:
+		ccb = setBit(ccb, 7)
+		ccb = setBit(ccb, 5)
+	}
+	return binary.Write(c, binary.BigEndian, ccb)
+}
+
+func (enc *TightPngEncoding) Write(c Conn, rect *Rectangle) error {
+	if err := writeTightCC(c, enc.TightCC); err != nil {
+		return err
+	}
+	cmp := enc.TightCC.Compression
+	switch cmp {
+	case TightCompressionPNG:
+		buf := bytes.NewBuffer(nil)
+		if err := png.Encode(buf, enc.Image); err != nil {
+			return err
+		}
+		if err := writeTightLength(c, buf.Len()); err != nil {
+			return err
+		}
+		if _, err := io.Copy(c, buf); err != nil {
+			return err
+		}
+	case TightCompressionFill:
+		var tpx TightPixel
+		r, g, b, _ := enc.Image.At(0, 0).RGBA()
+		tpx.R = uint8(r)
+		tpx.G = uint8(g)
+		tpx.B = uint8(b)
+		if err := binary.Write(c, binary.BigEndian, tpx); err != nil {
+			return err
+		}
+	default:
+		return fmt.Errorf("unknown tight compression %d", cmp)
+	}
+	return nil
+}
+
+type TightPixel struct {
+	R uint8
+	G uint8
+	B uint8
+}
+
+type TightPngEncoding struct {
+	TightCC *TightCC
+	Image   image.Image
+}
+
+func (*TightPngEncoding) Type() EncodingType { return EncTightPng }
+
+func (enc *TightPngEncoding) Read(c Conn, rect *Rectangle) error {
+	tcc, err := readTightCC(c)
+	if err != nil {
+		return err
+	}
+	enc.TightCC = tcc
+	cmp := enc.TightCC.Compression
+	switch cmp {
+	case TightCompressionPNG:
+		buf := bytes.NewBuffer(nil)
+		l, err := readTightLength(c)
+		if err != nil {
+			return err
+		}
+		_, err = io.CopyN(buf, c, int64(l))
+		if err != nil {
+			return err
+		}
+		enc.Image, err = png.Decode(buf)
+		if err != nil {
+			return err
+		}
+	case TightCompressionFill:
+		var tpx TightPixel
+		if err := binary.Read(c, binary.BigEndian, &tpx); err != nil {
+			return err
+		}
+		enc.Image = image.NewRGBA(image.Rect(0, 0, 1, 1))
+		enc.Image.(draw.Image).Set(0, 0, color.RGBA{R: tpx.R, G: tpx.G, B: tpx.B, A: 1})
+	default:
+		return fmt.Errorf("unknown compression %d", cmp)
+	}
+	return nil
+}
+
+func writeTightLength(c Conn, l int) error {
+	var buf []uint8
+
+	buf = append(buf, uint8(l&0x7F))
+	if l > 0x7F {
+		buf[0] |= 0x80
+		buf = append(buf, uint8((l>>7)&0x7F))
+		if l > 0x3FFF {
+			buf[1] |= 0x80
+			buf = append(buf, uint8((l>>14)&0xFF))
+		}
+	}
+	return binary.Write(c, binary.BigEndian, buf)
+}
+
+func readTightLength(c Conn) (int, error) {
+	var length int
+	var err error
+	var b uint8
+
+	if err = binary.Read(c, binary.BigEndian, &b); err != nil {
+		return 0, err
+	}
+
+	length = int(b) & 0x7F
+	if (b & 0x80) == 0 {
+		return length, nil
+	}
+
+	if err = binary.Read(c, binary.BigEndian, &b); err != nil {
+		return 0, err
+	}
+	length |= (int(b) & 0x7F) << 7
+	if (b & 0x80) == 0 {
+		return length, nil
+	}
+
+	if err = binary.Read(c, binary.BigEndian, &b); err != nil {
+		return 0, err
+	}
+	length |= (int(b) & 0xFF) << 14
+
+	return length, nil
+}
+
 func (enc *RawEncoding) Write(c Conn, rect *Rectangle) error {
 	buf := bytes.NewBuffer(nil)
 	defer buf.Reset()
@@ -58,16 +329,7 @@ func (enc *RawEncoding) Write(c Conn, rect *Rectangle) error {
 		if err := binary.Write(buf, binary.BigEndian, bytes); err != nil {
 			return err
 		}
-
-		/*
-			if _, err := buf.Write(bytes); err != nil {
-				return err
 	}
-		*/
-	}
-	fmt.Printf("w %d\n", n)
-	//return binary.Write(c, binary.BigEndian, buf.Bytes())
-	fmt.Printf("w %v\n", buf.Bytes())
 	_, err := c.Write(buf.Bytes())
 	return err
 }
@@ -80,13 +342,11 @@ func (enc *RawEncoding) Read(c Conn, rect *Rectangle) error {
 	bytesPerPixel := int(pf.BPP / 8)
 	n := rect.Area() * bytesPerPixel
 	data := make([]byte, n)
-	fmt.Printf("r %d\n", n)
 	if err := binary.Read(c, binary.BigEndian, &data); err != nil {
 		return err
 	}
 	buf.Write(data)
 	defer buf.Reset()
-	fmt.Printf("r %v\n", buf.Bytes())
 	colors := make([]Color, rect.Area())
 	for y := uint16(0); y < rect.Height; y++ {
 		for x := uint16(0); x < rect.Width; x++ {
@@ -105,7 +365,8 @@ func (enc *RawEncoding) Read(c Conn, rect *Rectangle) error {
 func (*RawEncoding) Type() EncodingType { return EncRaw }
 
 // DesktopSizePseudoEncoding represents a desktop size message from the server.
-type DesktopSizePseudoEncoding struct{}
+type DesktopSizePseudoEncoding struct {
+}
 
 func (*DesktopSizePseudoEncoding) Type() EncodingType { return EncDesktopSizePseudo }
 
@@ -113,7 +374,6 @@ func (*DesktopSizePseudoEncoding) Type() EncodingType { return EncDesktopSizePse
 func (*DesktopSizePseudoEncoding) Read(c Conn, rect *Rectangle) error {
 	c.SetWidth(rect.Width)
 	c.SetHeight(rect.Height)
-
 	return nil
 }
 

encodingtype_string.go

@@ -4,46 +4,59 @@ package vnc
 
 import "fmt"
 
-const (
+const _EncodingType_name = "EncContinuousUpdatesPseudoEncFencePseudoEncClientRedirectEncXvpPseudoEncExtendedDesktopSizePseudoEncTightPngEncQEMUExtendedKeyEventPseudoEncQEMUPointerMotionChangePseudoEncCompressionLevel1EncCompressionLevel2EncCompressionLevel3EncCompressionLevel4EncCompressionLevel5EncCompressionLevel6EncCompressionLevel7EncCompressionLevel8EncCompressionLevel9EncCompressionLevel10EncColorPseudoEncLastRectPseudoEncDesktopSizePseudoEncJPEGQualityLevelPseudo1EncJPEGQualityLevelPseudo2EncJPEGQualityLevelPseudo3EncJPEGQualityLevelPseudo4EncJPEGQualityLevelPseudo5EncJPEGQualityLevelPseudo6EncJPEGQualityLevelPseudo7EncJPEGQualityLevelPseudo8EncJPEGQualityLevelPseudo9EncJPEGQualityLevelPseudo10EncRawEncCopyRectEncRREEncCoRREEncHextileEncZlibEncTightEncZlibHexEncUltra1EncUltra2EncTRLEEncZRLEEncJPEGEncJRLE"
-	_EncodingType_name_0 = "EncClientRedirect"
-	_EncodingType_name_1 = "EncColorPseudo"
-	_EncodingType_name_2 = "EncDesktopSizePseudo"
-	_EncodingType_name_3 = "EncRawEncCopyRectEncRRE"
-	_EncodingType_name_4 = "EncCoRREEncHextileEncZlibEncTightEncZlibHexEncUltra1EncUltra2"
-	_EncodingType_name_5 = "EncTRLEEncZRLE"
-	_EncodingType_name_6 = "EncJPEGEncJRLE"
-)
 
-var (
+var _EncodingType_map = map[EncodingType]string{
-	_EncodingType_index_0 = [...]uint8{0, 17}
+	-313: _EncodingType_name[0:26],
-	_EncodingType_index_1 = [...]uint8{0, 14}
+	-312: _EncodingType_name[26:40],
-	_EncodingType_index_2 = [...]uint8{0, 20}
+	-311: _EncodingType_name[40:57],
-	_EncodingType_index_3 = [...]uint8{0, 6, 17, 23}
+	-309: _EncodingType_name[57:69],
-	_EncodingType_index_4 = [...]uint8{0, 8, 18, 25, 33, 43, 52, 61}
+	-308: _EncodingType_name[69:97],
-	_EncodingType_index_5 = [...]uint8{0, 7, 14}
+	-260: _EncodingType_name[97:108],
-	_EncodingType_index_6 = [...]uint8{0, 7, 14}
+	-258: _EncodingType_name[108:137],
-)
+	-257: _EncodingType_name[137:169],
+	-256: _EncodingType_name[169:189],
+	-255: _EncodingType_name[189:209],
+	-254: _EncodingType_name[209:229],
+	-253: _EncodingType_name[229:249],
+	-252: _EncodingType_name[249:269],
+	-251: _EncodingType_name[269:289],
+	-250: _EncodingType_name[289:309],
+	-249: _EncodingType_name[309:329],
+	-248: _EncodingType_name[329:349],
+	-247: _EncodingType_name[349:370],
+	-239: _EncodingType_name[370:384],
+	-224: _EncodingType_name[384:401],
+	-223: _EncodingType_name[401:421],
+	-32:  _EncodingType_name[421:447],
+	-31:  _EncodingType_name[447:473],
+	-30:  _EncodingType_name[473:499],
+	-29:  _EncodingType_name[499:525],
+	-28:  _EncodingType_name[525:551],
+	-27:  _EncodingType_name[551:577],
+	-26:  _EncodingType_name[577:603],
+	-25:  _EncodingType_name[603:629],
+	-24:  _EncodingType_name[629:655],
+	-23:  _EncodingType_name[655:682],
+	0:    _EncodingType_name[682:688],
+	1:    _EncodingType_name[688:699],
+	2:    _EncodingType_name[699:705],
+	4:    _EncodingType_name[705:713],
+	5:    _EncodingType_name[713:723],
+	6:    _EncodingType_name[723:730],
+	7:    _EncodingType_name[730:738],
+	8:    _EncodingType_name[738:748],
+	9:    _EncodingType_name[748:757],
+	10:   _EncodingType_name[757:766],
+	15:   _EncodingType_name[766:773],
+	16:   _EncodingType_name[773:780],
+	21:   _EncodingType_name[780:787],
+	22:   _EncodingType_name[787:794],
+}
 
 func (i EncodingType) String() string {
-	switch {
+	if str, ok := _EncodingType_map[i]; ok {
-	case i == -311:
+		return str
-		return _EncodingType_name_0
-	case i == -239:
-		return _EncodingType_name_1
-	case i == -223:
-		return _EncodingType_name_2
-	case 0 <= i && i <= 2:
-		return _EncodingType_name_3[_EncodingType_index_3[i]:_EncodingType_index_3[i+1]]
-	case 4 <= i && i <= 10:
-		i -= 4
-		return _EncodingType_name_4[_EncodingType_index_4[i]:_EncodingType_index_4[i+1]]
-	case 15 <= i && i <= 16:
-		i -= 15
-		return _EncodingType_name_5[_EncodingType_index_5[i]:_EncodingType_index_5[i+1]]
-	case 21 <= i && i <= 22:
-		i -= 21
-		return _EncodingType_name_6[_EncodingType_index_6[i]:_EncodingType_index_6[i+1]]
-	default:
-		return fmt.Sprintf("EncodingType(%d)", i)
 	}
+	return fmt.Sprintf("EncodingType(%d)", i)
 }

example/proxy/main.go

@@ -22,10 +22,17 @@ func main() {
 		Height:          600,
 		VersionHandler:  vnc.ServerVersionHandler,
 		SecurityHandler: vnc.ServerSecurityHandler,
-		SecurityHandlers:  []vnc.SecurityHandler{&vnc.ClientAuthNone{}},
+		SecurityHandlers: []vnc.SecurityHandler{
+			&vnc.ClientAuthVeNCrypt02Plain{Username: []byte("test"), Password: []byte("test")},
+			&vnc.ClientAuthNone{},
+		},
 		ClientInitHandler: vnc.ServerClientInitHandler,
 		ServerInitHandler: vnc.ServerServerInitHandler,
-		Encodings:         []vnc.Encoding{&vnc.RawEncoding{}},
+		Encodings: []vnc.Encoding{
+			&vnc.TightPngEncoding{},
+			&vnc.CopyRectEncoding{},
+			&vnc.RawEncoding{},
+		},
 		PixelFormat:     vnc.PixelFormat32bit,
 		ClientMessageCh: schClient,
 		ServerMessageCh: schServer,
@@ -57,9 +64,9 @@ func main() {
 		log.Fatalf("Error dial. %v", err)
 	}
 
-	scfg.Width = cc.Width()
+	//	scfg.Width = cc.Width()
-	scfg.Height = cc.Height()
+	//	scfg.Height = cc.Height()
-	scfg.PixelFormat = cc.PixelFormat()
+	//	scfg.PixelFormat = cc.PixelFormat()
 	go vnc.Serve(context.Background(), ln, scfg)
 
 	defer cc.Close()
@@ -75,28 +82,28 @@ func main() {
 		case msg := <-schClient:
 			switch msg.Type() {
 			case vnc.SetEncodingsMsgType:
-				msg0 := &vnc.SetPixelFormat{
+				var encTypes []vnc.EncodingType
-					PF: *vnc.PixelFormat32bit,
+				for _, enc := range scfg.Encodings {
+					encTypes = append(encTypes, enc.Type())
+				}
+				msg0 := &vnc.SetEncodings{
+					Encodings: encTypes,
 				}
 				cchClient <- msg0
-
-				encRaw := &vnc.RawEncoding{}
-				msg1 := &vnc.SetEncodings{
-					Encodings: []vnc.EncodingType{encRaw.Type()},
-				}
-				cchClient <- msg1
 				/*
-					msg2 := &vnc.FramebufferUpdateRequest{
+					if scfg.Width != cc.Width() || scfg.Height != cc.Height() {
-						Inc:    0,
+						msg1 := &vnc.FramebufferUpdate{
-						X:      0,
+							Rects: []*vnc.Rectangle{&vnc.Rectangle{
-						Y:      0,
 								Width:   cc.Width(),
 								Height:  cc.Height(),
+								EncType: vnc.EncDesktopSizePseudo,
+								Enc:     &vnc.DesktopSizePseudoEncoding{},
+							},
+							},
+						}
+						schServer <- msg1
 					}
-					cchClient <- msg2
 				*/
-			case vnc.SetPixelFormatMsgType:
-				cchClient <- msg
 			default:
 				cchClient <- msg
 			}

handlers.go

@@ -198,6 +198,9 @@ func ServerSecurityHandler(cfg *ServerConfig, c Conn) error {
 		if err := binary.Write(c, binary.BigEndian, []byte(authErr.Error())); err != nil {
 			return err
 		}
+		if err := c.Flush(); err != nil {
+			return err
+		}
 		return authErr
 	}
 

image.go

@@ -115,7 +115,6 @@ func colorsToImage(x, y, width, height uint16, colors []Color) *image.RGBA64 {
 // Marshal implements the Marshaler interface.
 func (r *Rectangle) Write(c Conn) error {
 	var err error
-	fmt.Printf("w rect %#+v\n", r)
 	if err = binary.Write(c, binary.BigEndian, r.X); err != nil {
 		return err
 	}
@@ -157,10 +156,17 @@ func (r *Rectangle) Read(c Conn) error {
 		return err
 	}
 	switch r.EncType {
+	case EncCopyRect:
+		r.Enc = &CopyRectEncoding{}
+	case EncTight:
+		r.Enc = &TightEncoding{}
+	case EncTightPng:
+		r.Enc = &TightPngEncoding{}
 	case EncRaw:
 		r.Enc = &RawEncoding{}
+	default:
+		return fmt.Errorf("unsupported encoding %s", r.EncType)
 	}
-	fmt.Printf("r rect %#+v\n", r)
 	return r.Enc.Read(c, r)
 }
 

security.go

@@ -1,6 +1,7 @@
 package vnc
 
 import (
+	"bytes"
 	"crypto/des"
 	"encoding/binary"
 	"fmt"
@@ -74,6 +75,10 @@ func (*ServerAuthNone) Auth(c Conn) error {
 	return nil
 }
 
+func (*ClientAuthVeNCrypt02Plain) Type() SecurityType {
+	return SecTypeVeNCrypt
+}
+
 func (*ClientAuthVeNCrypt02Plain) SubType() SecuritySubType {
 	return SecSubTypeVeNCrypt02Plain
 }
@@ -85,10 +90,52 @@ type ClientAuthVeNCrypt02Plain struct {
 }
 
 func (auth *ClientAuthVeNCrypt02Plain) Auth(c Conn) error {
+	if err := binary.Write(c, binary.BigEndian, []uint8{0, 2}); err != nil {
+		return err
+	}
+	if err := c.Flush(); err != nil {
+		return err
+	}
+	var (
+		major, minor uint8
+	)
+
+	if err := binary.Read(c, binary.BigEndian, &major); err != nil {
+		return err
+	}
+	if err := binary.Read(c, binary.BigEndian, &minor); err != nil {
+		return err
+	}
+	res := uint8(1)
+	if major == 0 && minor == 2 {
+		res = uint8(0)
+	}
+	if err := binary.Write(c, binary.BigEndian, res); err != nil {
+		return err
+	}
+	c.Flush()
+	if err := binary.Write(c, binary.BigEndian, uint8(1)); err != nil {
+		return err
+	}
+	if err := binary.Write(c, binary.BigEndian, auth.SubType()); err != nil {
+		return err
+	}
+	if err := c.Flush(); err != nil {
+		return err
+	}
+	var secType SecuritySubType
+	if err := binary.Read(c, binary.BigEndian, &secType); err != nil {
+		return err
+	}
+	if secType != auth.SubType() {
+		binary.Write(c, binary.BigEndian, uint8(1))
+		c.Flush()
+		return fmt.Errorf("invalid sectype")
+	}
 	if len(auth.Password) == 0 || len(auth.Username) == 0 {
 		return fmt.Errorf("Security Handshake failed; no username and/or password provided for VeNCryptAuth.")
 	}
-
+	/*
 		if err := binary.Write(c, binary.BigEndian, uint32(len(auth.Username))); err != nil {
 			return err
 		}
@@ -104,8 +151,30 @@ func (auth *ClientAuthVeNCrypt02Plain) Auth(c Conn) error {
 		if err := binary.Write(c, binary.BigEndian, auth.Password); err != nil {
 			return err
 		}
+	*/
+	var (
+		uLength, pLength uint32
+	)
+	if err := binary.Read(c, binary.BigEndian, &uLength); err != nil {
+		return err
+	}
+	if err := binary.Read(c, binary.BigEndian, &pLength); err != nil {
+		return err
+	}
 
-	return c.Flush()
+	username := make([]byte, uLength)
+	password := make([]byte, pLength)
+	if err := binary.Read(c, binary.BigEndian, &username); err != nil {
+		return err
+	}
+
+	if err := binary.Read(c, binary.BigEndian, &password); err != nil {
+		return err
+	}
+	if !bytes.Equal(auth.Username, username) || !bytes.Equal(auth.Password, password) {
+		return fmt.Errorf("invalid username/password")
+	}
+	return nil
 }
 
 // ServerAuthVNC is the standard password authentication. See 7.2.2.

server.go

@@ -156,7 +156,6 @@ func (*FramebufferUpdate) Read(c Conn) (ServerMessage, error) {
 	if err := binary.Read(c, binary.BigEndian, &msg.NumRect); err != nil {
 		return nil, err
 	}
-	fmt.Printf("%#+v\n", msg)
 	for i := uint16(0); i < msg.NumRect; i++ {
 		rect := &Rectangle{}
 		if err := rect.Read(c); err != nil {
@@ -164,15 +163,10 @@ func (*FramebufferUpdate) Read(c Conn) (ServerMessage, error) {
 		}
 		msg.Rects = append(msg.Rects, rect)
 	}
-	fmt.Printf("r fb %d %d %v\n", msg.NumRect, uint16(len(msg.Rects)), msg.Rects)
-	if msg.NumRect != uint16(len(msg.Rects)) {
-		panic("rects not equal")
-	}
 	return &msg, nil
 }
 
 func (msg *FramebufferUpdate) Write(c Conn) error {
-	fmt.Printf("w fb %d %d %v\n", msg.NumRect, uint16(len(msg.Rects)), msg.Rects)
 	if err := binary.Write(c, binary.BigEndian, msg.Type()); err != nil {
 		return err
 	}
@@ -341,14 +335,12 @@ func (c *ServerConn) Handle() error {
 				if err := binary.Read(c, binary.BigEndian, &messageType); err != nil {
 					return err
 				}
-				fmt.Printf("srv r %s\n", messageType)
 				msg, ok := clientMessages[messageType]
 				if !ok {
 					return fmt.Errorf("unsupported message-type: %v", messageType)
 
 				}
 				parsedMsg, err := msg.Read(c)
-				fmt.Printf("srv r %#+v\n", parsedMsg)
 				if err != nil {
 					fmt.Printf("srv err %s\n", err.Error())
 					return err

tightcompression_string.go

@@ -0,0 +1,27 @@
+// Code generated by "stringer -type=TightCompression"; DO NOT EDIT.
+
+package vnc
+
+import "fmt"
+
+const (
+	_TightCompression_name_0 = "TightCompressionBasic"
+	_TightCompression_name_1 = "TightCompressionFillTightCompressionJPEGTightCompressionPNG"
+)
+
+var (
+	_TightCompression_index_0 = [...]uint8{0, 21}
+	_TightCompression_index_1 = [...]uint8{0, 20, 40, 59}
+)
+
+func (i TightCompression) String() string {
+	switch {
+	case i == 0:
+		return _TightCompression_name_0
+	case 8 <= i && i <= 10:
+		i -= 8
+		return _TightCompression_name_1[_TightCompression_index_1[i]:_TightCompression_index_1[i+1]]
+	default:
+		return fmt.Sprintf("TightCompression(%d)", i)
+	}
+}

tightfilter_string.go

@@ -0,0 +1,16 @@
+// Code generated by "stringer -type=TightFilter"; DO NOT EDIT.
+
+package vnc
+
+import "fmt"
+
+const _TightFilter_name = "TightFilterCopyTightFilterPaletteTightFilterGradient"
+
+var _TightFilter_index = [...]uint8{0, 15, 33, 52}
+
+func (i TightFilter) String() string {
+	if i >= TightFilter(len(_TightFilter_index)-1) {
+		return fmt.Sprintf("TightFilter(%d)", i)
+	}
+	return _TightFilter_name[_TightFilter_index[i]:_TightFilter_index[i+1]]
+}