| unit Unit1; interface uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Buttons, nwbase, nwlib, ExtCtrls, FileCtrl, Registry,INIFiles; type
TForm1 = class(TForm)
LblTitle: TLabel;
MemoInfo: TMemo;
BButtNext: TBitBtn;
BButtCancel: TBitBtn;
NWBase1: TNWBase;
LblUserName: TLabel;
Timer1: TTimer;
LblCheckEngineVer: TLabel;
Timer2: TTimer;
PanelInfo: TPanel;
LblFullName: TLabel;
LblDetails: TLabel;
LblEngineVersion: TLabel;
LblEngineVerFound: TLabel;
BButtHelp: TBitBtn;
LblVirDef: TLabel;
LblVirDefFound: TLabel;
LblEngineUpdateVer: TLabel;
LblVirDefInfo: TLabel;
LblVirDefUpgrade: TLabel;
LblCheckVirDef: TLabel;
LblWinVersion: TLabel;
procedure Startup(Sender: TObject);
procedure ReadIni(Sender: TObject);
procedure BButtCancelClick(Sender: TObject);
procedure BButtNextClick(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure CheckStatus(Sender: TObject);
procedure Timer2Timer(Sender: TObject);
procedure BButtHelpClick(Sender: TObject);
procedure FTPSiteChange(Sender: TObject); private
{ Private declarations }
public
{ Public declarations }
end; var
Form1: TForm1;
Username: String;
EngineVerFound: string; //That read from Registry
EngineVerUpgrade: string; //Version of engine in upgrade (read from INI file)
UpdateExe: string; //Superdat Executable that runs to upgrade scan engine and virus defs
VirDefFound: string; //DAT file version read from Registry
VirDefUpgrade: string;//Version of DAT file in the upgrade, read from INI file.
RunUpdate: Boolean; // If True then update will run.
WinVersion: String; //either 'W95' or 'NT4-2000' implementation uses help;
function CreateProcessAndWait(AppPath, AppParams: String; Visibility: word): DWord ; forward;
function CompareEngineVersion(EngineVerFound, EngineVerUpgrade: String): String; forward;
function CompareVirDefVersion(VirDefFound, VirDefUpgrade: String): String; forward; {$R *.DFM} {-----------------------------------------}
procedure TForm1.Startup(Sender: TObject);
begin
username := whoami(0);
RunUpdate := False; //Initialise
LblUserName.Caption := UserName;
LblUserName.Update;
LblFullName.Caption := FullName(0,Username);
LblFullName.Update; ReadIni(Sender); //Reads version of engine being upgraded.
CheckStatus(Sender);//Check if update has already run.
FTPSiteChange(Sender);//Change auto-update to HW FTP site
end;
{------------------------------------------------}
procedure TForm1.ReadIni(Sender: TObject);
{Reads INI file to find initial settings}
Var
AppINI: TIniFile; {Variable of type INI file required for "ReadSectionValues"}
INIFile: String; {Name of INI file} begin
try
INIFile := ExtractFilePath(application.exename)+ 'updatevir.ini';
if not FileExists(INIFile) then
begin
ShowMessage('Fatal Error: initialisation file ' + INIFile +' cannot be found');
BButtCancelClick(Sender); //Quit
exit;
end;
AppIni := TIniFile.Create(INIFile); {assign memory for TIniFile object} {Read the engine version to the application window}
EngineVerUpgrade := trim(AppIni.ReadString('Engine','EngineUpgradeVer','engine unknown'));
LblEngineUpdateVer.Caption := EngineVerUpgrade;
{Read location of SuperDat update exe to be run}
UpdateExe :=trim(AppIni.ReadString('Engine','UpdateExe','unknown'));
{Read version of virus definitions in the upgrade }
VirDefUpgrade :=trim(AppIni.ReadString('Engine','VirDefUpgrade','unknown'));
LblVirDefUpgrade.Caption := VirDefUpgrade; finally
AppIni.Free;
end;
end;
{-----------------------------------------------}
procedure TForm1.BButtCancelClick(Sender: TObject);
{Close form, check if update has been allowed to run.}
begin
// if EngineVerFound <> EngineVerUpgrade then //Update required
// if not FoundMoreRecent then //skip this check if more recent engine detected
// if MessageDlg('Are you sure your virus scan engine is more recent than '+ EngineVerUpgrade+' ?', mtConfirmation, [mbYes, mbNo], 0) = mrYes then
// ShowMessage('Okay. Please ignor this check.')
// else
// ShowMessage('No problem. This program will run again when you next login.'); MemoInfo.Clear;
MemoInfo.Update;
Close;
Application.Terminate;
end; {---------------------------------------------------}
procedure TForm1.FTPSiteChange(Sender: TObject);
{On NT/2000 changes the FTP DAT auto-update path to the Heriot-Watt site}
var
Reg: TRegistry;
FTPLocationHW: String; //Where McAfee should get it's FTP update info.
FTPLocationFound: String; //Where McAfee looks for it's FTP update. begin
try
Reg:=TRegistry.Create;
Reg.RootKey:=HKey_Local_Machine; // Section to look for within the registry
if not Reg.KeyExists('Software/McAfee/VirusScan/Tasks/Update') then exit //Not an NT machine
else //An NT or W2000 machine with the required keys
begin //Read from Registry
FTPLocationHW := 'ftp.hw.ac.uk/pub/internal/antivirus/update/';
Reg.OpenKey('Software/McAfee/VirusScan/Tasks/Update',False);//False = Don't create
if Reg.ValueExists('szUpdateFTPLocation') then FTPLocationFound:= trim(Reg.ReadString('szUpdateFTPLocation'));
if lowercase(FTPLocationFound) <> lowercase(trim(FTPLocationHW)) then //change to HW site
begin
try
Reg.WriteString('szUpdateFTPLocation',FTPLocationHW); //Change to HW campus one.
except
begin
LblCheckVirDef.Caption :='Unable to change FTP location.' ;
LblCheckVirDef.Update;
end;
end; // of try-except
end;
end;
finally
Reg.CloseKey;
Reg.Free;
end;
end;
{---------------------------------------------------}
procedure TForm1.BButtNextClick(Sender: TObject);
{Runs the anti-virus update}
//var
// UpdateExe: String;
begin
// UpdateExe := 'n:/School/install/vscan4.03/autoupgrade/setup.exe';
if not FileExists(UpdateExe) then
begin
ShowMessage('Cannot find ' + UpdateExe);
exit;
end;
Form1.Visible := False;
CreateProcessAndWait(UpdateExe,'',1);
BButtNext.Visible := False;
BButtCancel.Visible := False;
LblFullName.Visible := False;
Timer1.Enabled := True; //startup countdown to exit
MemoInfo.Clear;
MemoInfo.Visible := False; LblCheckVirDef.Caption := 'Update is complete !';
Form1.ClientHeight := 104;
Form1.Visible := True;
end;
{-------------------------------------------------------}
function CreateProcessAndWait(AppPath, AppParams: String; Visibility: word): DWord;
var
SI: TStartupInfo;
PI: TProcessInformation;
Proc: THandle;
begin
FillChar(SI, SizeOf(SI), 0);
SI.cb := SizeOf(SI);
SI.wShowWindow := Visibility;
if not CreateProcess(PChar(AppPath), PChar(AppParams), Nil, Nil, False,
Normal_Priority_Class, Nil, Nil, SI, PI) then
raise Exception.CreateFmt('Failed to execute program. Error Code %d',
[GetLastError]);
Proc := PI.hProcess;
CloseHandle(PI.hThread);
if WaitForSingleObject(Proc, Infinite) <> Wait_Failed then
GetExitCodeProcess(Proc, Result);
CloseHandle(Proc);
end;
{----------------------------------------}
procedure TForm1.CheckStatus(Sender: TObject);
{Checks
1) version of DAT files and Engine in Registry}
var
Reg: TRegistry; begin
try
{Read version of engine and DAT files from Registry}
Reg:=TRegistry.Create;
Reg.RootKey:=HKey_Local_Machine; // Section to look for within the registry {Check if OS is Windows 95 which stores Virus Def version string differently}
Reg.OpenKey('Software/Microsoft/Windows/CurrentVersion',False);//False = Don't create
if Reg.ValueExists('ProductName') then WinVersion := 'W95' else WinVersion := 'NT4-2000';
Reg.CloseKey;
LblWinVersion.Caption := WinVersion;
LblWinVersion.Update; if not Reg.KeyExists('Software/McAfee/VirusScan') then //No registry key ... odd.
begin
EngineVerFound := 'unknown';
LblEngineVerFound.Caption := 'Unknown';
end
else
begin //Read from Registry
Reg.OpenKey('Software/McAfee/VirusScan',False);//False = Don't create
if Reg.ValueExists('szEngineVer') then EngineVerFound:= trim(Reg.ReadString('szEngineVer'));
LblEngineVerFound.Caption :=EngineVerFound;
LblEngineVerFound.Update; if Reg.ValueExists('szVirDefVer') then VirDefFound := trim(Reg.ReadString('szVirDefVer'));
//NT4 has format 4.0.4121
//W95 has format 4121
LblVirDefFound.Caption := VirDefFound;
LblVirDefFound.Update;
end; {Initial check to make sure value has real data, not 'unknown' etc.}
if lowercase(EngineVerFound) = 'unknown' then
begin
LblCheckEngineVer.Caption:= 'Unknown scan engine.';
LblCheckEngineVer.Update;
BButtCancelClick(Sender); //quit without action
exit;
end;
if length(EngineVerFound) <2 then //maybe no data or faulty data.
begin
LblCheckEngineVer.Caption:= 'Unknown scan engine.';
LblCheckEngineVer.Update;
BButtCancelClick(Sender); //quit without action
exit;
end;
{Now take action depending on what version of engine was found:}
if EngineVerFound = EngineVerUpgrade then //no need to update engine, same versions
begin
// Form1.ClientHeight := 112; //Reduce height of form
LblCheckEngineVer.Caption := 'Status: Engine already updated, thank-you !';
LblCheckEngineVer.Update;
// Timer1.Enabled := True; //Countdown to Exit
end
else
begin
if CompareEngineVersion(EngineVerFound, EngineVerUpgrade) = 'upgrade_yes' then
begin
RunUpdate := True; //Set global flag to run the update exe.
MemoInfo.Visible := True;
MemoInfo.Update;
LblCheckEngineVer.Caption := 'Status: Engine update required';
LblCheckEngineVer.Font.Color := clRed;
LblCheckEngineVer.Update;
end
else //function must have detected a later version
begin
// Form1.ClientHeight := 112; //Reduce height of form
LblCheckEngineVer.Caption := 'Status: Current engine is more recent.';
LblCheckEngineVer.Update;
// Timer1.Enabled := True; //Countdown to Exit
end;
end;
{NT4-2000 code************** Now check version of virus definitions **********************
NT4 has VirDefFound and VirDefUpgrade both in same format e.g. 4.0.4120 so next test will work:}
if VirDefFound = VirDefUpgrade then //no need to update engine, same versions
begin
// Form1.ClientHeight := 112; //Reduce height of form
LblCheckVirDef.Caption := 'Status: Virus Definitions already updated, thank-you !';
LblCheckVirDef.Update;
if not RunUpdate then
begin
Form1.ClientHeight := 112; //Reduce height of form
Timer1.Enabled := True; //Countdown to Exit, since engine doesn't need update either
end;
end
else //Call the procedure which determines if a later or earlier version is installed
begin // OR W95 is installed, in which case first test in IF block would also fail:
if CompareVirDefVersion(VirDefFound, VirDefUpgrade) = 'upgrade_yes' then
begin
MemoInfo.Visible := True;
MemoInfo.Update;
LblCheckVirDef.Caption := 'Status: Virus Definition update required';
LblCheckVirDef.Font.Color := clRed;
LblCheckVirDef.Update;
end
else //function must have detected a later version so quit unless Engine needs update
begin
LblCheckVirDef.Caption := 'Status: Current virus definitions are more recent.';
LblCheckVirDef.Update;
if not RunUpdate then
begin
Form1.ClientHeight := 112; //Hides the NEXT button, etc.
Timer1.Enabled := True; //Start close procedure
end;
end;
end;
finally
Reg.CloseKey;
Reg.Free; //Free Registry memory.
end;
end;
{-------------------------------------------------------}
function CompareEngineVersion(EngineVerFound, EngineVerUpgrade: String): String;
{Compares two version strings, higher numbers indicate later version}
{e.g.
EngineVerFound 4.0.60
EngineVerUpgrade 4.0.70
so break numbers into parts and compare each '.' delimited value}
var
E_VerF: array[1..3] of string; //Array holding characters in EngineVerFound
E_VerU: array[1..3] of string; //Array holding characters in EngineVerUpgrade
i,j: integer; //loop counter
bit, test: string;
begin
if length(EngineVerFound)<2 then
begin
Result := 'upgrade_no';
exit;
end; j:=1;
for i:=1 to length(EngineVerFound) do //step through characters
begin
bit := copy(EngineVerFound,i,1);// Just a single character copied from the string
if bit = '.' then //we've completed one subversion of the engine version
begin
j:= j+1; //So next E_Ver[j] to be incremented will refer to next subversion number
end
else
begin //Still building subversion string or at the end of the string.
E_VerF[j] := E_VerF[j] +bit;
end;
end; {repeat for the Upgrade Engine ... slightly wasteful of code}
j:=1;
for i:=1 to length(EngineVerUpgrade) do //step through characters
begin
bit := copy(EngineVerUpgrade,i,1);// Just a single character copied from the string
if bit = '.' then //we've completed one subversion of the engine version
begin
j:= j+1; //So next E_Ver[j] to be incremented will refer to next subversion number
end
else
begin //Still building subversion string or at the end of the string.
E_VerU[j] := E_VerU[j] +bit;
end;
end;
{
test := e_verU[1] +'-' +e_verU[2] +'-'+ e_verU[3];
ShowMessage('Upgrade version was '+Test); test := e_verF[1] +'-' +e_verF[2] +'-'+ e_verF[3];
ShowMessage('Detected version was '+Test);
}
{Now compare each version, most significant bit first. Convert to integers first}
{If one subelement of Found version > that of Upgrade version then don't upgrade}
Result := 'upgrade_yes'; //set a default
for j:= 1 to 3 do
begin
// ShowMessage('Found: '+E_VerF[j]+' Upgrade: '+E_VerU[j]);
if StrToInt(E_VerF[j]) > StrToInt(E_VerU[j]) then //one subversion found > equiv. subversion upgrade
begin
Result := 'upgrade_no';
exit;
end;
end; end;
{-------------------------------------------------------}
function CompareVirDefVersion(VirDefFound, VirDefUpgrade: String): String;
{Compares two version strings of Virus Defs, higher numbers indicate later version}
{e.g.
VirDefFound 4.0.60
VirDefUpgrade 4.0.4104
so break numbers into parts and compare each '.' delimited value.
Windows 95 stores only the last number - 4104 - whereas NT4 and 2000 store 4.0.4104, for example.}
var
E_VerF: array[1..3] of string; //Array holding characters in VirDefFound
E_VerU: array[1..3] of string; //Array holding characters in VirDefUpgrade
i,j: integer; //loop counter
bit, test: string; begin
if length(VirDefFound)<2 then
begin
Result := 'upgrade_no';
exit;
end; {Split NT4/2000 Virus Def strings into three parts:}
j:=1;
for i:=1 to length(VirDefFound) do //step through characters
begin
bit := copy(VirDefFound,i,1);// Just a single character copied from the string
if bit = '.' then //we've completed one subversion of the engine version
begin
j:= j+1; //So next E_Ver[j] to be incremented will refer to next subversion number
end
else
begin //Still building subversion string or at the end of the string.
E_VerF[j] := E_VerF[j] +bit;
end;
end; {repeat for the Upgrade Engine ... slightly wasteful of code}
j:=1;
for i:=1 to length(VirDefUpgrade) do //step through characters
begin
bit := copy(VirDefUpgrade,i,1);// Just a single character copied from the string
if bit = '.' then //we've completed one subversion of the engine version
begin
j:= j+1; //So next E_Ver[j] to be incremented will refer to next subversion number
end
else
begin //Still building subversion string or at the end of the string.
E_VerU[j] := E_VerU[j] +bit;
end;
end; {Start W95 code, which above tests will not work for. This compares the final string of the
upgrade virus definition with the VirDefFound string
e.g. Last number of VirDefUpgrade (4.1.4014) is here '4014'
VirDefFound for W95 is the single number '4014'
The test thus compares the least significant bit of VirDefUpgrade, which isn't good but that's
how McAffee store the virus definition version string.
}
if WinVersion = 'W95' then
if StrToInt(E_VerU[3]) > StrToInt(VirDefFound) then
begin
ShowMessage(VirDefFound);
Result := 'upgrade_yes';
exit; //Don't process NT4-2000 code
end
else
begin
Result := 'upgrade_no';
exit;
end;
{
test := e_verU[1] +'-' +e_verU[2] +'-'+ e_verU[3];
ShowMessage('Virus Def Upgrade version was '+Test);
test := e_verF[1] +'-' +e_verF[2] +'-'+ e_verF[3];
ShowMessage('Virus Def Detected version was '+Test);
} {Now compare each version, most significant bit first. Convert to integers first}
{If one subelement of Found version > that of Upgrade version then don't upgrade}
Result := 'upgrade_yes'; //set a default
for j:= 1 to 3 do
begin
// ShowMessage('Found: '+E_VerF[j]+' Upgrade: '+E_VerU[j]);
if StrToInt(E_VerF[j]) > StrToInt(E_VerU[j]) then //one subversion found > equiv. subversion upgrade
begin
Result := 'upgrade_no';
exit;
end;
end;
end; {-------------------------------------------------------}
procedure TForm1.Timer1Timer(Sender: TObject);
begin
BButtCancelClick(Sender);
end; {-------------------------------------}
procedure TForm1.Timer2Timer(Sender: TObject);
{Flashes the NEXT button}
begin
if BButtNext.Caption = 'NEXT' then
begin
BButtNext.Caption := '';
BButtNext.Update;
end
else
begin
BButtNext.Caption := 'NEXT';
BButtNext.Update;
end;
end;
{-----------------------}
procedure TForm1.BButtHelpClick(Sender: TObject);
begin
FrmHelp.ShowModal;
end;
{---------------------------------} end.
|
