Add a back button to the passphrase entry page. Clear the clipboard

after 45 seconds.

cmd/passgo-gui/impl_darwin.go

@@ -1,4 +1,4 @@
-//+build !android !linux
+//+build darwin
 
 package main
 

cmd/passgo-gui/impl_non_darwin.go

@@ -0,0 +1,38 @@
+//+build !darwin
+
+package main
+
+import (
+	"os"
+	"os/user"
+	"path"
+
+	"golang.org/x/image/font/gofont/goregular"
+	"golang.org/x/image/font/sfnt"
+)
+
+var (
+	regular *sfnt.Font
+	confDir string
+)
+
+func init() {
+	regular, err = sfnt.Parse(goregular.TTF)
+	if err != nil {
+		log(Fatal, "Cannot parse default font: ", err)
+	}
+	usr, err := user.Current()
+	if err != nil {
+		log(Fatal, "Cannot get current user: ", err)
+	}
+	confDir = path.Join(usr.HomeDir, ".config/passgo")
+	if _, err := os.Stat(confDir); os.IsNotExist(err) {
+		err = os.MkdirAll(confDir, 0700)
+		if err != nil {
+			log(Info, "Cannot create configuration directory ", confDir)
+			log(Fatal, err)
+		} else {
+			log(Info, "Configuration directory created")
+		}
+	}
+}

cmd/passgo-gui/main.go

@@ -65,6 +65,7 @@ func main() {
 
 	reload = make(chan struct{})
 	updated = make(chan struct{})
+	passch = make(chan []byte)
 
 	go Updater()
 	log(Info, "Staring event loop")
@@ -80,6 +81,7 @@ var (
 	store    passgo.Store
 	reload   chan struct{}
 	updated  chan struct{}
+	passch   chan []byte
 	black    = color.RGBA{A: 0xff, R: 0, G: 0, B: 0}
 	white    = color.RGBA{A: 0xff, R: 0xff, G: 0xff, B: 0xff}
 	gray     = color.RGBA{A: 0xff, R: 0xf0, G: 0xf0, B: 0xf0}
@@ -284,7 +286,13 @@ func eventLoop() {
 		Background: darkgray,
 		Alignment:  text.Middle,
 	}
-	var copiedWhen time.Time
+	cleared := &Overlay{Face: face, Text: "clipboard cleared",
+		Color:      black,
+		Background: darkgray,
+		Alignment:  text.Middle,
+	}
+	overlay := copied
+	var overlayStart time.Time
 
 	updateBtns := func() {
 		passBtns = passBtns[:0]
@@ -334,6 +342,16 @@ func eventLoop() {
 		Background: gray,
 	}
 
+	promptLabel := &text.Label{Face: face, Text: "passphrase"}
+	promptEd := &text.Editor{Face: face, SingleLine: true}
+	okBtn := &Button{
+		Face:       face,
+		Label:      "ok",
+		Alignment:  text.End,
+		Color:      black,
+		Background: gray,
+	}
+
 	anim := &time.Ticker{}
 	animating := false
 	animOn := func() {
@@ -346,8 +364,14 @@ func eventLoop() {
 		animating = false
 	}
 
-	var listPage, confPage, page func()
-	_ = confPage
+	var listPage, confPage, promptPage, page func()
+
+	prompt := func() []byte {
+		page = promptPage
+		promptEd.SetText("")
+		w.Invalidate()
+		return <-passch
+	}
 
 	listPage = func() {
 		cs = flex.Flexible(1.0)
@@ -373,12 +397,20 @@ func eventLoop() {
 					log(Info, "Clicked ", btn.Label)
 					// don't block UI thread on decryption attempt
 					go func(name string) {
-						//p,err := store.Decrypt(name, prompt)
-						p, err := store.Decrypt(name)
+						p,err := store.Decrypt(name, prompt)
+						//p, err := store.Decrypt(name)
 						if err == nil {
 							passgo.Clip(p)
-							copiedWhen = time.Now()
+							overlayStart = time.Now()
+							overlay = copied
 							animOn()
+							go func() {
+								time.Sleep(time.Second * 45)
+								passgo.Clip("")
+								overlay = cleared
+								overlayStart = time.Now()
+								animOn()
+							}()
 						} else {
 							log(Info, "Can't decrypt ", name)
 							log(Info, err)
@@ -395,29 +427,27 @@ func eventLoop() {
 			page = confPage
 		}
 		flex.Layout(c1, c2)
-		x := time.Since(copiedWhen).Seconds()
+		x := time.Since(overlayStart).Seconds()
 		start, end := 1.5, 1.75
 		switch {
 		case x > start && x < end:
 			fade := (end - x) / (end - start)
-			copied.Color.R = uint8(float64(black.R) * fade)
-			copied.Color.G = uint8(float64(black.G) * fade)
-			copied.Color.B = uint8(float64(black.B) * fade)
-			copied.Color.A = uint8(float64(black.A) * fade)
-			copied.Background.R = uint8(float64(darkgray.R) * fade)
-			copied.Background.G = uint8(float64(darkgray.G) * fade)
-			copied.Background.B = uint8(float64(darkgray.B) * fade)
-			copied.Background.A = uint8(float64(darkgray.A) * fade)
+			overlay.Color.R = uint8(float64(black.R) * fade)
+			overlay.Color.G = uint8(float64(black.G) * fade)
+			overlay.Color.B = uint8(float64(black.B) * fade)
+			overlay.Color.A = uint8(float64(black.A) * fade)
+			overlay.Background.R = uint8(float64(darkgray.R) * fade)
+			overlay.Background.G = uint8(float64(darkgray.G) * fade)
+			overlay.Background.B = uint8(float64(darkgray.B) * fade)
+			overlay.Background.A = uint8(float64(darkgray.A) * fade)
 			fallthrough
 		case x <= start:
 			cs = margincs
 			al := layout.Align{Alignment: layout.SE}
 			cs = al.Begin(ops, cs)
 			cs.Width.Min = cs.Width.Max
-			dims = al.End(copied.Layout(c, ops, cs))
+			dims = al.End(overlay.Layout(c, ops, cs))
 		case animating:
-			copied.Color = black
-			copied.Background = darkgray
 			animOff()
 		}
 	}
@@ -459,6 +489,41 @@ func eventLoop() {
 		}
 	}
 
+	promptPage = func()  {
+		cs = flex.Rigid()
+		c2 := flex.End(promptLabel.Layout(ops, cs))
+		cs = flex.Rigid()
+		c3 := flex.End(promptEd.Layout(c, q, ops, cs))
+		cs = flex.Rigid()
+		al := &layout.Align{Alignment: layout.E}
+		cs = al.Begin(ops, cs)
+		btnflx := &layout.Flex{Axis: layout.Horizontal}
+		btnflx.Init(ops, cs)
+		cs = btnflx.Rigid()
+		bc1 := btnflx.End(backBtn.Layout(c, q, ops, cs))
+		cs = btnflx.Rigid()
+		bc2 := btnflx.End(okBtn.Layout(c, q, ops, cs))
+		dims = btnflx.Layout(bc1, bc2)
+		c4 := flex.End(al.End(dims))
+		flex.Layout(c1, c2, c3, c4)
+		if okBtn.Clicked() {
+			log(Info, "Ok")
+			go func() { // do not block UI thread
+				passch <-[]byte(promptEd.Text())
+			}()
+			w.Invalidate()
+			page = listPage
+		}
+		if backBtn.Clicked() {
+			log(Info, "Back")
+			go func() {
+				passch <- nil // cancel prompt
+			}()
+			w.Invalidate()
+			page = listPage
+		}
+	}
+
 	page = listPage
 
 	for {

impl_darwin.go

@@ -1,4 +1,4 @@
-//+build !android !linux
+//+build darwin
 
 package passgo
 

impl_non_darwin.go

@@ -0,0 +1,12 @@
+//+build !darwin
+
+package passgo
+
+import (
+	"log"
+)
+
+//Clip copies a string to the clipboard
+func Clip(x string) {
+	log(Info,"Clipboard not implemented for this platform")
+}

main.go

@@ -122,15 +122,18 @@ func AskPass(prompts ...func() []byte) openpgp.PromptFunction {
 		}
 	}
 
-	var err error
 	var passphrase []byte
-	dec := func(p *packet.PrivateKey) {
+	dec := func(p *packet.PrivateKey) error {
 		for i := 0; i < 3; i++ {
-			if err = p.Decrypt(passphrase); err == nil {
-				break
+			if err := p.Decrypt(passphrase); err == nil {
+				return err
 			}
 			passphrase = prompt()
+			if passphrase == nil {
+				return fmt.Errorf("Passphrase entry aborted")
+			}
 		}
+		return fmt.Errorf("Passphrase entry failed")
 	}
 
 	var ret openpgp.PromptFunction
@@ -138,16 +141,20 @@ func AskPass(prompts ...func() []byte) openpgp.PromptFunction {
 		if !symmetric {
 			for _, k := range keys {
 				if p := k.PrivateKey; p != nil && p.Encrypted {
-					dec(p)
+					if err := dec(p); err != nil {
+						return nil, err
+					}
 				}
 				for _, s := range k.Entity.Subkeys {
 					if p := s.PrivateKey; p != nil && p.Encrypted {
-						dec(p)
+						if err := dec(p); err != nil {
+							return nil, err
+						}
 					}
 				}
 			}
 		}
-		return passphrase, err
+		return passphrase, nil
 	}
 	return ret
 }