Reduce character set for passwords

At the beginning of each VMware build packer generates a random VNC password and prints it to the terminal / log. When copying a password from a terminal emulator with double-click, the text selection uses word boundaries to attempt to automatically detect where the password string is located. When the password contains weird characers like %^&# this parsing fails and you only get half the password. The reduction in characters does not significantly reduce the entropy of the password but improves user-friendliness when you actually want to use it.

Also deletedsome unused files

builder/vmware/common/step_configure_vnc.go

@@ -63,7 +63,7 @@ func VNCPassword(skipPassword bool) string {
 	}
 	length := int(8)
 
-	charSet := []byte("1234567890-=qwertyuiop[]asdfghjkl;zxcvbnm,./!@#%^*()_+QWERTYUIOP{}|ASDFGHJKL:XCVBNM<>?")
+	charSet := []byte("012345689abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 	charSetLength := len(charSet)
 
 	password := make([]byte, length)

builder/vmware/common/step_configure_vnc.go.rej

@@ -1,46 +0,0 @@
-diff a/builder/vmware/common/step_configure_vnc.go b/builder/vmware/common/step_configure_vnc.go	(rejected hunks)
-@@ -52,6 +52,21 @@ func (StepConfigureVNC) VNCAddress(portMin, portMax uint) (string, uint, error)
- 	return "127.0.0.1", vncPort, nil
- }
- 
-+func VNCPassword() (string) {
-+	length := int(8)
-+
-+	charSet := []byte("1234567890-=qwertyuiop[]asdfghjkl;zxcvbnm,./!@#%^*()_+QWERTYUIOP{}|ASDFGHJKL:XCVBNM<>?")
-+	charSetLength := len(charSet)
-+
-+	password := make([]byte, length)
-+
-+	for i := 0; i < length; i++ {
-+		password[i] = charSet[ rand.Intn(charSetLength) ]
-+	}
-+
-+	return string(password)
-+}
-+
- func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
- 	driver := state.Get("driver").(Driver)
- 	ui := state.Get("ui").(packer.Ui)
-@@ -86,12 +101,14 @@ func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
- 		ui.Error(err.Error())
- 		return multistep.ActionHalt
- 	}
-+	vncPassword := VNCPassword()
- 
- 	log.Printf("Found available VNC port: %d", vncPort)
- 
- 	vmxData := ParseVMX(string(vmxBytes))
- 	vmxData["remotedisplay.vnc.enabled"] = "TRUE"
- 	vmxData["remotedisplay.vnc.port"] = fmt.Sprintf("%d", vncPort)
-+	vmxData["remotedisplay.vnc.password"] = vncPassword
- 
- 	if err := WriteVMX(vmxPath, vmxData); err != nil {
- 		err := fmt.Errorf("Error writing VMX data: %s", err)
-@@ -102,6 +119,7 @@ func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
- 
- 	state.Put("vnc_port", vncPort)
- 	state.Put("vnc_ip", vncIp)
-+	state.Put("vnc_password", vncPassword)
- 
- 	return multistep.ActionContinue
- }

builder/vmware/common/step_type_boot_command.go.rej

@@ -1,26 +0,0 @@
-diff a/builder/vmware/common/step_type_boot_command.go b/builder/vmware/common/step_type_boot_command.go	(rejected hunks)
-@@ -45,6 +45,7 @@ func (s *StepTypeBootCommand) Run(state multistep.StateBag) multistep.StepAction
- 	ui := state.Get("ui").(packer.Ui)
- 	vncIp := state.Get("vnc_ip").(string)
- 	vncPort := state.Get("vnc_port").(uint)
-+	vncPassword := state.Get("vnc_password")
- 
- 	// Connect to VNC
- 	ui.Say("Connecting to VM via VNC")
-@@ -57,7 +58,15 @@ func (s *StepTypeBootCommand) Run(state multistep.StateBag) multistep.StepAction
- 	}
- 	defer nc.Close()
- 
--	c, err := vnc.Client(nc, &vnc.ClientConfig{Exclusive: true})
-+	var auth []vnc.ClientAuth
-+
-+	if vncPassword != nil  {
-+		auth = []vnc.ClientAuth{&vnc.PasswordAuth{Password: vncPassword.(string)}}
-+	} else {
-+		auth = []vnc.ClientAuth{}
-+	}
-+
-+	c, err := vnc.Client(nc, &vnc.ClientConfig{Auth: auth, Exclusive: true})
- 	if err != nil {
- 		err := fmt.Errorf("Error handshaking with VNC: %s", err)
- 		state.Put("error", err)