1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101:
102:
103:
104:
105:
106:
107:
108:
109:
110:
111:
112:
113:
114:
115:
116:
117:
118:
119:
120:
121:
122:
123:
124:
125:
126:
127:
128:
129:
130:
131:
132:
133:
134:
135:
136:
137:
138:
139:
140:
141:
142:
143:
144:
145:
146:
147:
148:
149:
150:
151:
152:
153:
154:

procedure Join (Main_FileName, Hidden_Filename : string);
var
 MainFile    : TFileStream;
 HiddenFile  : TFileStream;
 SizeOfFile  : Cardinal;
 SearchWord  : string[10];
begin
 MainFile       := TFileStream.Create(Main_FileName, fmOpenReadWrite or fmShareDenyWrite);
 try
   SizeOfFile     := MainFile.Size;
   HiddenFile     := TFileStream.Create(Hidden_Filename, fmOpenRead or fmShareDenyNone);
   try
     MainFile.Seek(0, soFromEnd);
     MainFile.CopyFrom(HiddenFile, 0);
     MainFile.Seek(0, soFromEnd);
   finally
    HiddenFile.Free;
   end;
   SearchWord := IntToStr(SizeOfFile) + #0;
   MainFile.Seek(0, soFromEnd);
   MainFile.WriteBuffer(SearchWord, SizeOf(SearchWord));
 finally
  MainFile.Free;
 end;
end;

procedure Split(Main_FileName, NewFromMain_Filename : string);
var
 MainFile  : TFileStream;
 SplitFile : TFileStream;
 HelpStr   : string[10];
 GetSize   : integer;
begin
 MainFile    := TFileStream.create(Main_FileName, fmOpenReadWrite or fmShareDenyWrite);
 try
   SplitFile := TFileStream.Create(NewFromMain_Filename, fmCreate or fmShareDenyNone);
   try
     MainFile.Position   := MainFile.Size - 11;
     MainFile.Read(HelpStr, 10);
     GetSize := StrToInt(HelpStr);
     MainFile.Position := GetSize;
     SplitFile.CopyFrom(MainFile, MainFile.Size-GetSize);
     SplitFile.Size := SplitFile.Size - 11;
     MainFile.Size :=  GetSize;
   finally
    SplitFile.Free;
   end;
 finally
  MainFile.Free;
 end;
end;


function AttachToFile(const AFileName: string; MemoryStream: TMemoryStream): Boolean;
var
  aStream: TFileStream;
  iSize: Integer;
  wert : string;
begin
  Result := False;
  if not FileExists(AFileName) then
    Exit;
  try
    aStream := TFileStream.Create(AFileName, fmOpenWrite or fmShareDenyWrite);
//    Memo1.Lines.Add(#01#02#99);
    MemoryStream.Seek(0, soFromBeginning);
    // seek to end of File
    // ans Ende der Datei Seeken
    aStream.Seek(0, soFromEnd);
    // copy data from MemoryStream
    // Daten vom MemoryStream kopieren
    aStream.CopyFrom(MemoryStream, 0);
    // save Stream-Size
    // die Streamgröße speichern
    wert := '#01#02#99';
    iSize := MemoryStream.Size + SizeOf(Integer);
    aStream.Write(iSize, SizeOf(iSize));
//    aStream.Write(iSize);
  finally
    aStream.Free;
  end;
  Result := True;
end;

function LoadFromFile(const AFileName: string; MemoryStream: TMemoryStream): Boolean;
var
  aStream: TFileStream;
  iSize: Integer;
begin
  Result := False;
  if not FileExists(AFileName) then
    Exit;
  try
    aStream := TFileStream.Create(AFileName, fmOpenRead or fmShareDenyWrite);
    // seek to position where Stream-Size is saved
    // zur Position seeken wo Streamgröße gespeichert
    aStream.Seek(5, soFromEnd);
//    if (aStream = #99) then
    aStream.Seek(-SizeOf(Integer), soFromEnd);

    aStream.Read(iSize, SizeOf(iSize));
    if iSize > aStream.Size then
    begin
      aStream.Free;
      Exit;
    end;
    // seek to position where data is saved
    // zur Position seeken an der die Daten abgelegt sind
    aStream.Seek(-iSize, soFromEnd);
    MemoryStream.SetSize(iSize - SizeOf(Integer));
    MemoryStream.CopyFrom(aStream, iSize - SizeOf(iSize));
    MemoryStream.Seek(0, soFromBeginning);
  finally
    aStream.Free;
  end;
  Result := True;
end;


procedure TForm1.Button1Click(Sender: TObject);
var
  aStream: TMemoryStream;
begin
  aStream := TMemoryStream.Create;
  Memo1.Lines.Add(#01#02#99);
  Memo1.Lines.SaveToStream(aStream);
  AttachToFile('Test.exe', aStream);
  aStream.Free;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  aStream: TMemoryStream;
begin
  aStream := TMemoryStream.Create;
  LoadFromFile('Test.exe', aStream);
//  SaveFromStream('Test1.exe', aStream);


  Memo1.Lines.LoadFromStream(aStream);
  aStream.Free;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  Join('EB.exe', 'first.txt');
  Join('EB.exe', 'sec.txt');
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  Split(ParamStr(0), 'C:\sec.txt');
  Split(ParamStr(0), 'c:\first.txt');
end;