From a448e9200077cede0e189b243fdad41463959d8e Mon Sep 17 00:00:00 2001
From: DaanSelen <dselen@systemec.nl>
Date: Thu, 8 Jan 2026 17:30:28 +0100
Subject: [PATCH] chore: update code

---
 go.mod        |  5 ++++-
 go.sum        |  4 ++++
 src/action.go | 42 +++++++++++++++++++++++++++++++++++++++++-
 src/draw.go   | 34 +++++++++++++++++++++++++++++++++-
 src/main.go   |  7 +++++++
 5 files changed, 89 insertions(+), 3 deletions(-)

diff --git a/go.mod b/go.mod
index 8ed051b..9bbf526 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,10 @@ module rpi-charon
 
 go 1.25.5
 
-require fyne.io/fyne/v2 v2.7.2
+require (
+	fyne.io/fyne/v2 v2.7.2
+	golang.org/x/crypto v0.46.0
+)
 
 require (
 	fyne.io/systray v1.12.0 // indirect
diff --git a/go.sum b/go.sum
index f9b78bf..0287239 100644
--- a/go.sum
+++ b/go.sum
@@ -67,12 +67,16 @@ github.com/yuin/goldmark v1.7.16 h1:n+CJdUxaFMiDUNnWC3dMWCIQJSkxH4uz3ZwQBkAlVNE=
 github.com/yuin/goldmark v1.7.16/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
+golang.org/x/crypto v0.46.0 h1:cKRW/pmt1pKAfetfu+RCEvjvZkA9RimPbh7bhFjGVBU=
+golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0=
 golang.org/x/image v0.34.0 h1:33gCkyw9hmwbZJeZkct8XyR11yH889EQt/QH4VmXMn8=
 golang.org/x/image v0.34.0/go.mod h1:2RNFBZRB+vnwwFil8GkMdRvrJOFd1AzdZI6vOY+eJVU=
 golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
 golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
 golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
 golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/term v0.38.0 h1:PQ5pkm/rLO6HnxFR7N2lJHOZX6Kez5Y1gDSJla6jo7Q=
+golang.org/x/term v0.38.0/go.mod h1:bSEAKrOT1W+VSu9TSCMtoGEOUcKxOKgl3LE5QEF/xVg=
 golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
 golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/src/action.go b/src/action.go
index 75cc460..b4e0073 100644
--- a/src/action.go
+++ b/src/action.go
@@ -1,5 +1,45 @@
 package main
 
-func connect() {
+import (
+	"log"
+	"net"
+	"time"
 
+	"golang.org/x/crypto/ssh"
+)
+
+func translateRaspiName(targetName string) (string, string) {
+	for _, raspiObj := range raspiList {
+		if raspiObj[0] == targetName {
+			// Found!
+			return raspiObj[1], raspiObj[2]
+		}
+	}
+
+	return "", ""
+}
+
+func verifyCred(username, password, targetName string) bool {
+	hostname, port := translateRaspiName(targetName)
+	log.Println("Connecting to:", hostname, port)
+
+	config := &ssh.ClientConfig{
+		User: username,
+		Auth: []ssh.AuthMethod{
+			ssh.Password(password),
+		},
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(), // OK for internal tools (and me in production)
+		Timeout:         5 * time.Second,
+	}
+
+	connAddr := net.JoinHostPort(hostname, port)
+	client, err := ssh.Dial("tcp", connAddr, config)
+
+	if err != nil {
+		log.Printf("Err occurred %v", err)
+		return false
+	}
+	defer client.Close()
+
+	return true
 }
diff --git a/src/draw.go b/src/draw.go
index c14b39b..a0611ba 100644
--- a/src/draw.go
+++ b/src/draw.go
@@ -3,6 +3,7 @@ package main
 import (
 	"image/color"
 	"log"
+	"time"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/canvas"
@@ -12,6 +13,23 @@ import (
 	"fyne.io/fyne/v2/widget"
 )
 
+func flashRed(btnPtr *widget.Button) {
+	// Set red on UI thread
+	fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+		btnPtr.Importance = widget.DangerImportance
+		refreshButtons(btnPtr)
+	}, false)
+
+	log.Println("Waiting")
+	time.Sleep(1 * time.Second)
+
+	// Reset on UI thread
+	fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+		btnPtr.Importance = widget.LowImportance
+		refreshButtons(btnPtr)
+	}, false)
+}
+
 func drawSeparator(trailNewLine bool) *fyne.Container {
 	emptyLabel := widget.NewLabel("") // Give it some space at the bottom with an empty line
 	separatorLine := canvas.NewLine(color.Gray{Y: 128})
@@ -126,10 +144,24 @@ func drawTargetSection(raspiNames []string, raspiTarget *string) *fyne.Container
 	)
 
 	var verifyBtn *widget.Button
+	var credOK bool
 	verifyBtn = widget.NewButton("Verify Credentials", func() {
 		verifyBtn.Importance = widget.HighImportance
+
 		log.Println("Verifying credentials...")
-		refreshButtons(verifyBtn)
+		go func() {
+			credOK = verifyCred(userEntry.Text, passEntry.Text, *raspiTarget)
+
+			if credOK {
+				// Must update UI on main thread
+				fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+					verifyBtn.Importance = widget.SuccessImportance
+					refreshButtons(verifyBtn)
+				}, true)
+			} else {
+				flashRed(verifyBtn) // flashRed should handle RunOnMain internally
+			}
+		}()
 	})
 	verifyWide := container.NewGridWrap(
 		buttonSize,
diff --git a/src/main.go b/src/main.go
index b001065..b1dcfc2 100644
--- a/src/main.go
+++ b/src/main.go
@@ -10,6 +10,13 @@ import (
 	"fyne.io/fyne/v2/widget"
 )
 
+type ActionConfig struct {
+	username string
+	password string
+	hostname string
+	port     int
+}
+
 const (
 	appName string = "RPi Charon Configuration Tool"
 )