String overflowing when concatenated
I am trying to make a software packer, but I always fail because when I concat three lines (one contains the source prefix, one contains the executable content, the other contains the source suffix) the content overflows into the suffix. Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.IO;
using System.IO.Compression;
namespace ProgramPacker
{
public partial class Form1 : Form
{
static string prefix = @"using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ProgramPacker
{
class Program
{
static string inside = @" + "\"";
static string suffix = "\";\n" + @"static void Main(string[] args)
{
string temp = Path.GetRandomFileName() +" + "\"" + @".exe" + "\"" + @";
BinaryWriter sw = new BinaryWriter(new FileStream(temp, FileMode.Create));
sw.Write(inside);
sw.Flush();
sw.Close();
System.Diagnostics.Process.Start(temp);
}
}
}";
public string code = "";
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.ShowDialog();
BinaryReader br = new BinaryReader(new FileStream(openFileDialog1.FileName, FileMode.Open));
byte[] data = new byte[br.BaseStream.Length];
br.Read(data, 0, (int)br.BaseStream.Length);
br.Close();
string inside = Encoding.UTF7.GetString(data);
code = string.Concat(prefix, string.Concat(inside, suffix));
}
private void button2_Click(object sender, EventArgs e)
{
Console.Write(code);
CSharpCodeProvider cs = new CSharpCodeProvider();
ICodeCompiler compile = cs.CreateCompiler();
CompilerParameters param = new CompilerParameters();
param.GenerateInMemory = false;
param.ReferencedAssemblies.Add("mscorlib.dll");
param.ReferencedAssemblies.Add("System.dll");
param.ReferencedAssemblies.Add("System.Core.dll");
param.GenerateExecutable = true;
param.OutputAssembly = Environment.CurrentDirectory + "/a.exe";
param.WarningLevel = 4;
CompilerResults comp = compile.CompileAssemblyFromSource(param, code);
foreach (CompilerError error in comp.Errors)
{
MessageBox.Show(error.Line + " " + error.Column + " " + error.ErrorText);
}
MessageBox.Show(comp.PathToAssembly);
MessageBox.Show("Finish!");
}
}
}
It outputs:
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ProgramPacker
{
class Program
{
static string inside = @"?ãÎoüoy±ôãøÿ?ÿQÔh¦Rt!?^ÿyóë=G:Fÿ»??¿Ç/}òKÿ?úõßû3õMù?c·?Äûòëoª?À_Û>LÖïá^öÿ·õ©üüòcÊ?ª??÷Ô?î:^ȯÏäG¶?ù ?ñË?oñëy:ôã7??ò@ÚyN?w¿=?ëÆ÷ëÛßTëºÓ»yßüø]áå{ö/àïªêL©Oÿ;ú5rù% ä¸?1)Ï?¥?y®ÿ]0QL8û×ÖGòów±?øÿèü[?ª~éá¿ÿó£üüJ~ܹ
Êw¡h??/?úçeñÈ_?¿?ü½L^ywü7?,ùÅû¿ß£ó÷w?É~Ç????ê?ÿQÌyç¿??¹Cö×vZ__>?? ûïx?_ü"õ!ì; ;ùõåÇ?ú3*¿ @ÿV?èÿ¿Ë??/½P¶y?â¡??ùñÿÑæä/A¶_ò?v??ÿ?ÿQtÄx÷w?O'N?u$ÿk÷U«yÆò?£.Y?ùw(?ßÔ6ÿ]2ÿeUÆò¿?ضö·ßO~ü#*y£Jæ·Ä w yóYëï´
õ}y¡ä¨ù÷YPdú?Z©Óé¼R?æg?ÀSyà쬽ÉÿûÁ?ym>ut?ÿA??>?¿[ôçF ê´)9ß9xÿ£¿?
åùïyí ÁTlù
-ùñ?Òÿ·!·
E?£üO5÷]çºy?7Áè¿?Zô?(å§
#ü¥úõ®?o«âû]0Èßä7¿à??¿õ?d?ѵ;Jü_K?úAMìT>Àü1mR0sâ¿ê¨õ{äö×ó??¿.úÿõ½Eä?ÔïÿÎÿ±³v'ÿûìw ?»oÃø1±WtB
É¡wì&øuå£Îÿ?Éw?|úWÿ=ö÷_ÿ·?y®YWöwû¿ßß?Öe'û?%?yß/×Àî-yÿ.?8åóù?ûÇÚ6ÿÂßøï?Áàï?{8Zy?¿Å5yø ÇpÏ9=ó»üÑ>Õ?Èÿ?Y¿,?ëÿ?Êçÿì_}E?÷Ûú|î$ò÷ø}Jÿ^Êtò¿?@á|ò{Ø`<ªÿQ?QLæ½õo)¿ü&¿áÂÿ¼ó¿_÷7yMå8)¿Ùo'¿õ±üü=~#LÚ¿ó§¢Ë÷üO?Æ?å÷WJÍ$¾¸øW?A?Òÿ(09Áÿà³_ëÿù3l?SWYµßô÷¤~?ÀG¿ñ
??Às%ÍyÑ;Ò¸!ÿ?_Iÿ¼¼í/Ôrö
?T´ôÑùyǹßE~üV?ñ¿C~VßùuÿG X8|._¼Å_:Æü-?îü:?øì?|W ¤ÃÓW01?$å×?Û#ùIÿû·1:4û½ü._y^òÙNó?º1?ßIÍ?ÿ¿ß_~|ÖùX?@?në_B?¡µ~_×ãÿhãèïØÏßì¡yïôk_y;HÿÛyÿàâ/sÀ??? $ìw0Jüßü«@?ûo?¿îËX
´úÏ?Æ?Y>øçÿFpyÅÿèËöyK¡²Ì`}ù½Ò¿íÿÀñn"?Í?ëOëi»ò¹Î~çÿ?_òüîÿh£ôáêDøÏÿ¶?ç·fy ÄúçÿÖÿ?yÿ?¿?ã0ÿ¿Ë÷åå?ÿQ|ü/ü9¿?÷×Hè×ÉÏ#õ??æ?ÿâ?x?ß?5µ}~Øy¾ß^øè{¿
y{íü;Òÿ¿óú7¤¡î?» yû?ÀÓøiP?ÿÀ_ôK?Gëªíá@??ú%íwS×ñ¿¨#Û¦ÿÿÛªy\]¼÷Z~yR~ü¶ÿ£hû???ÇãÿQVèÿ©?÷{O?Gë¬ ??¡ø\«L` æcëí¿ ½?»?ü?oë¼Ätÿ>ò÷£_¯ÖiÄ?¯ÿÓ¿÷Ï?(c¦äàéûèó?ü£´çÕè4üy_
r?qÆ¿ø'?KÿÀ_ó×xùkÔ¿FõkÌ~õ¯1y5Ú_ã'??n~âר~å¯ñkü»¿Æø×رÿÿ5~?_ã7ø5~Í_ã?Z4ÔrñkL~ò׸?5Òßûÿ??ñïñnQ¦?yYÕò³vÇ;¥ùrZÍ?åÅg}õæÙöÁGiÓfËYVVËü³®óæ£ßãè7NgM?/&åuJrustInfo>
</assembly>
;
}
}
}
Any help?
EDIT: Why is everyone voting? I just asked a question.
You are having a problem with a view that is hardly possible to fix with your code as is.
However, you can take a similar approach with minor changes (which don't actually compress your program at all).
- Remove the
@
lines from the definitioninside
. This is one of the reasons for your problems. -
You can't just put a BELL or NUL character on a string in your string, write them out in Unicode instead:
string inside = String.Concat( data.Select(b => String.Format(@"\u{0:X4}", b)));
-
Now, in your code
suffix
, reinterpret the stringinside
as the characters you passed in bytes:sw.Write(inside.Select(c => (byte)c).ToArray()); // hardly efficient
I was able to use these changes and successfully "package" and execute the following:
C:\temp>type hello.cs
using System;
class M {
static void Main(string[] args) {
System.IO.File.Create("hello.world");
}
}
C:\temp>csc hello.cs
Microsoft (R) Visual C# 2010 Compiler version 4.0.30319.1
Copyright (C) Microsoft Corporation. All rights reserved.
C:\temp>pack.exe hello.exe
3584 bytes
C:\temp>a.exe
C:\temp>dir *.world
Volume in drive C is OSDisk
Volume Serial Number is AABD-D663
Directory of C:\temp
03/22/2012 16:36 0 hello.world
1 File(s) 0 bytes
0 Dir(s) 279,351,762,944 bytes free
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Don't use bare UTF7 or UTF8 strings, use Base64 encoding instead.
// given: byte[] data = new byte[...]
string inside = System.Convert.ToBase64String(data);
code = string.Concat(prefix, string.Concat(inside, suffix));
// in your target code
sw.Write(System.Convert.FromBase64String(inside));
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Better to use CodeCompileUnit to generate C # code from C # program: http://msdn.microsoft.com/en-us/library/system.codedom.codecompileunit.aspx
You can also use this to compile the generated ATS into an assembly.
Or parse template parts from files. This will make the code more readable.
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You cannot simply express the executable binary as a C # string without dumping it. At the very least, you need to replace any occurrences of the double quote character ( '"'
) with a sequence of two double quote characters. I would be very surprised if the only problem you are facing.
Note that a string may contain control characters that cause the screen to display the string in a garbled way, but this does not necessarily lead to incorrect compilation of the code containing the string. For example, if you have a shorthand string containing backspace ( "stac{backspace}koverflow"
say), the character after backspace will overwrite the character before the backspace, so looking at the string on the screen will give an inaccurate representation of its contents ( "stakoverflow"
). The compiler will presumably see the full 14-character string, including backspace.
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