CNG-Explorer/uCNGExplorer.pas at main · AlexZIX/CNG-Explorer · GitHub

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unit uCNGExplorer;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
  Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ComCtrls,
  Vcl.ExtCtrls, System.IOUtils, System.IniFiles, uNCryptCreatePersistedKey,
  uNCryptOpenStorageProvider, NCryptCNG, uNCryptFreeObject, uNCryptFinalizeKey,
  uNCryptDeleteKey, uNCryptOpenKey, uNCryptEnumKeys, uNCryptEncrypt, uNCryptProperty,
  Winapi.ShellAPI, uNCryptSign, uNCryptEnumAlgorithms, uNCryptExportImport,
  uNCryptEnumStorageProviders;

type
  TfrmMain = class(TForm)
    tvFunctions: TTreeView;
    pnlFrames: TPanel;
    lbPointers: TListBox;
    pnlCopyrights: TPanel;
    lblAuthor: TLabel;
    lblGithubLink: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure tvFunctionsChange(Sender: TObject; Node: TTreeNode);
    procedure FormDestroy(Sender: TObject);
    procedure lblGithubLinkClick(Sender: TObject);
  private
    SelectedFrame: TFrame;
    SelectedFrameIndex: Integer;

    procedure LoadSettings;
    procedure SaveSettings;

    procedure GetAppVersion;

    procedure OnChangePointers(Sender: TObject);
  public
    { Public declarations }
  end;

var
  frmMain: TfrmMain;

implementation

{$R *.dfm}

procedure TfrmMain.FormCreate(Sender: TObject);
begin
  tvFunctions.FullExpand;
  GetAppVersion;

  LoadSettings;
end;

procedure TfrmMain.FormDestroy(Sender: TObject);
begin
  if Assigned(SelectedFrame) then
    FreeAndNil(SelectedFrame);

  SaveSettings;
end;

procedure TfrmMain.GetAppVersion;
var S, SS, AppVer, AppDate: string;
    D: TDateTime;
    FileName: string;
    VSize, VIHandle: longword;
    pcBuf: PChar;
    pcValue: Pointer;
    M: array [0 .. 1] of Word;
begin
  AppVer := '';
  AppDate := '';
  FileName := Application.EXEName + chr(0);
  VSize := GetFileVersionInfoSize(@FileName[1], VIHandle);
  pcBuf := AllocMem(VSize);
  try
    if GetFileVersionInfo(@FileName[1], 0, VSize, pcBuf) then
    begin
      if VerQueryValue(pcBuf, PChar('\VarFileInfo\Translation'), pcValue,
        VIHandle) then
      begin
        Move(pcValue^, M, 4);
        s := Format('%x', [M[0]]);
        while Length(s) < 4 do
          s := '0' + s;
        ss := Format('%x', [M[1]]);
        while Length(ss) < 4 do
          ss := '0' + ss;
        s := s + ss;
        if VerQueryValue(pcBuf, PChar('StringFileInfo\' + s + '\FileVersion'),
          pcValue, VIHandle) then
        begin
          SetLength(AppVer, VIHandle - 1);
          Move(pcValue^, AppVer[1], (VIHandle - 1) * 2);
        end;
      end;
    end;
    ss := Application.EXEName;
    FileAge(ss, D);
    AppDate := DateToStr(D);
  finally
    FreeMem(pcBuf);
  end;

  Caption := Caption + ' v.' + AppVer + ' (' + AppDate + ')';
end;

procedure TfrmMain.lblGithubLinkClick(Sender: TObject);
begin
  ShellExecute(0, 'Open',
    'https://github.com/AlexZIX/CNG-Explorer',
    '', '', SW_SHOWNORMAL);
end;

procedure TfrmMain.LoadSettings;
begin
  with TIniFile.Create(TPath.GetHomePath + '\Bazis\CNGExplorer.ini') do
  try
    frmMain.Left := ReadInteger('MainForm', 'Left', 0);
    frmMain.Top := ReadInteger('MainForm', 'Top', 0);
  finally
    Free;
  end;
end;

procedure TfrmMain.OnChangePointers(Sender: TObject);
begin
  lbPointers.Clear;

  if TNCryptCNG.hProvider <> 0 then
    lbPointers.Items.Add('hProvider = $' + IntToHex(TNCryptCNG.hProvider));

  if TNCryptCNG.hKey <> 0 then
    lbPointers.Items.Add('hKey = $' + IntToHex(TNCryptCNG.hKey));
end;

procedure TfrmMain.SaveSettings;
begin
  with TIniFile.Create(TPath.GetHomePath + '\Bazis\CNGExplorer.ini') do
  try
    WriteInteger('MainForm', 'Left', frmMain.Left);
    WriteInteger('MainForm', 'Top', frmMain.Top);
  finally
    Free;
  end;
end;

procedure TfrmMain.tvFunctionsChange(Sender: TObject; Node: TTreeNode);
begin
  if Assigned(SelectedFrame) and (SelectedFrameIndex <> Node.SelectedIndex) then
    SelectedFrame.Parent := nil;

  if Node.SelectedIndex <> 0 then
  begin
    case Node.SelectedIndex of
      1: SelectedFrame := TfrmNCryptCreatePersistedKey.GetFrame(OnChangePointers);
      2: SelectedFrame := TfrmNCryptFinalizeKey.GetFrame;
      3: SelectedFrame := TfrmNCryptEncrypt.GetFrame;
      4: SelectedFrame := TfrmNCryptOpenStorageProvider.GetFrame(OnChangePointers);
      5: SelectedFrame := TfrmNCryptFreeObject.GetFrame(OnChangePointers);
      6: SelectedFrame := TfrmNCryptDeleteKey.GetFrame(OnChangePointers);
      7: SelectedFrame := TfrmNCryptOpenKey.GetFrame(OnChangePointers);
      8: SelectedFrame := TfrmNCryptEnumKeys.GetFrame;
      9: SelectedFrame := TfrmNCryptProperty.GetFrame;
     10: SelectedFrame := TfrmNCryptSign.GetFrame;
     11: SelectedFrame := TfrmNCryptEnumAlgorithms.GetFrame;
     12: SelectedFrame := TfrmNCryptExportImport.GetFrame;
     13: SelectedFrame := TfrmNCryptEnumStorageProviders.GetFrame;
    end;

    SelectedFrameIndex := Node.SelectedIndex;

    SelectedFrame.Align := alClient;
    SelectedFrame.Parent := pnlFrames;
  end;
end;

end.