Is there a way to generate random number on Windows by reading from a file or pseudo file or character special file, the way that can be done on Linux by reading from /dev/random? Not asking about various crypto API, but whether there is in Windows something akin to the Linux way.
Yes, it's called Microsoft CryptoAPI.
This link from StingyJack's answer is good: http://en.wikipedia.org/wiki/CryptGenRandom
Microsoft C++ Visual Studio since 2005 offers rand_s() which works on Windows XP and up. It is based on RtlGenRandom (as are CryptoAPI's PRNG functions), whose inner workings are not made public. It seems in XP there were some weaknesses that have since been fixed.
Personally, I use rand_s() as an additional source of randomness to seed a PRNG of my choice.
If you're doing .NET development you can use the RandomNumberGenerator class.
Related
First, sorry for my poor English...
I want to add a virtual folder to Windows Explorer using a Namespace Extension (NSE), and I want users to be able to open this virtual folder to explore some path (e.g., c:\test).
How can I do this using Delphi? Thanks.
The place to start is the MSDN documentation: Introduction to the Shell Namespace. Naturally this is written from a C++ perspective but it's not too hard to map that across to Delphi.
Another excellent resource for such tasks is Code Project. For example: The Complete Idiot's Guide to Writing Namespace Extensions - Part I by Mike Dunn. In fact this is just part of an excellent series of articles on shell extensions.
At present Delphi is a poor choice because it does not produce 64 bit executables. This means that your shell extension will not run on 64 bit Windows which is now a serious limitation.
With the recent release of Delphi XE2 this limitation has been removed. XE2 is capable of producing 64 bit executables and can therefore be used to produce 64 bit shell extensions.
Basically a shell extension is a COM object that implements a set of interfaces. Which interfaces needs to be implemented depends on the type of the extension (there are some used by any extension, of course).
You can start reading here (you need some C -> Delphi translation, but when you start to work on such matters is better you get prepared to it), and then the reference is of course MSDN
http://www.shellplus.com/examples/namespace-extension-example.html
http://delphipower.tripod.com/winshell.htm
Which programming language and tools can i use, to develope a complete stand-alone gui-application? This application will be burned on a cd and should run on every windows-pc without any installations.
Questions like what your application and what your capabilities are need to be considered.
There are many solutions to your problem. From 'Visual Studio Ultimate' to a HTML file which contains javascript.
Win32 API.. a similar question was asked today...
Use Visual Studio (you can use express edition) and build whatever you like.
This is the most powerful language, yet development time is very very slow, but the results are:
a. independent.
b. if you a good programmer - small and fast.
one thing - you got to know what you're doing when programming win32...
one Petzold book will get you where you want to go.
similar question
Well, if you really have the time and don't need to deploy on 16-bit Windows, you could always write in Win32 assembly -see MASM32 and Iczelion's Win32 tutorials. There's even a IDE for Win32 ASM -WinAsm Studio :)
The only dependencies you'll need are the Windows system DLLs which are already there on every Win32 system.
However, if you need to build something quick, something like Visual Basic 6 will do nicely - it only needs the VB6 runtime by default (1 ~ 2 MB) and that definitely fits into a CD together with your VB6 EXE.
I'd go for C++ with MFC. Reasonable development times and with static linking it could all be one standalone exe file.
If you are just looking to make one of those interactive splash screens, might want to look into Demoshield. I know its old and not supported any longer, but can be of real use for something great looking.
http://www.componentsource.com/products/509937/12838/index.html
You can find copies of it free by google-ing it. Don't think the company is around any longer so not sure if this is legit or not.
But not the right choice if you need to do some serious programming stuff.
Delphi also may be a good choice.
I want to make an easy to deploy Windows application and was was wondering which programming systems can create totally self contained Windows .exe files?
As a plus, if the same can be done with MacOSX and Linux from the same source this would be a bonus. I took a look at Realbasic but they have since abandoned the single .exe concept.
update: i am looking for something that can run from Windows XP up to Windows 7, no matter what version of .NET is installed. Is this even possible?
Delphi compiles to one executable, and generates native windows executables. So no dependencies to any kind of framework. If you use Free Pascal (fpc) and the Lazarus IDE, you could even develop for Linux and Apple from the same source.
If your using external dll's this would become a bit more tricky, but you could pack them up in your resource file and still maintain the one exe property.
Update 2020: since #Vassilis & #Marco van der Voort commented on this, I would like to update my old andswer and add that go is a very good way to make self-contained executables. Even crossplatform compilation is realy simple.
You can certainly do this with C/C++. Technically the runtime libraries are required, but they should already be installed on any windows, mac or linux system.
With .NET you can compile to an EXE, but of course the .NET framework is required. For newer versions of windows it should be installed by default, but on older versions (XP or older?) it may or may not be there. And of course you couldn't expect mono to be there by default on linux or mac either.
For Windows the following languages are viable:
C (MS, gcc)
C++ (MS, g++, Digital Mars)
D (Digital Mars)
Delphi (Embarcadero??? how do you spell that? just trips off the tongue doesn't it?)
Fortran (Intel, Salford Software)
Visual Basic 6 (MS)
Lua (you'll need a special tool to do it, but it is doable)
C#, VB.Net, F#, J#, etc (assuming that you don't mind using .Net technology)
You can use Tcl/tk. The technology you should research is a "starpack", which combines a runtime executable (a starkit) with a platform-specific runtime (a "tclkit") to create a single-file executable. It's remarkable in the fact that it's not just compiled code, but an entire self-contained virtual filesystem that can include images, sound, data, etc.
This same technology works for many platforms from the same code base. The only thing that is different is the platform-specific runtime. You can even "cross compile" in that you can copy the runtime for multiple platforms onto your dev box and then build starpacks for each platform without having to actually be on each platform.
Tcl can do this, especially through producing starpacks. They can be produced for all platforms from the same code. Note that this also includes all the necessary runtime libraries (except for things like the C library, but you don't want to make that static under normal circumstances).
JavaFX 2.2 supports that. It allows creation of self-contained applications targeting Windows, Mac OS, and Linux.
Please follow this link for more information: http://docs.oracle.com/javafx/2/deployment/self-contained-packaging.htm.
I would recommend taking a look at AutoIt. It is an easy-to-use scripting language that will compile into an exe, so there are no runtimes needed. This would be for windows only though.
http://www.autoitscript.com/autoit3/index.shtml
From the website:
AutoIt v3 is a freeware BASIC-like
scripting language designed for
automating the Windows GUI and general
scripting. ... AutoIt is also very small,
self-contained and will run on all
versions of Windows out-of-the-box
with no annoying "runtimes" required!
c/c++
purebasic
delphi
vb6
i hope this help :)
Here's a good source for a number of basic-like programming languages that build small stand-alone EXEs. Some are cross-platform for Windows and Linux:
www.basic.mindteq.com
You can use Liberty Basic which is easy and cheap, you can easily make stand alone programs for windows but not possible to transfer to MacOS or Linux.
You can do this for Windows with .NET languages using ILMerge
ILMerge is a utility for merging multiple .NET assemblies into a single .NET assembly. It works on executables and DLLs alike and comes with several options for controlling the processing and format of the output. See the accompanying documentation for details.
However:
Currently, ILMerge works only on Windows-based platforms. It does not yet support Rotor or Mono.
QBasic can :-)
I wrote a few command line tools using it!
I have a desktop program I downloaded and installed. It runs from an .exe file.
Is there some way from the .exe file to tell what programming language was used to write the program?
Are there any tools are available to help with this?
What languages can be determined and which ones cannot?
Okay here are two of the sort of things I'm looking for:
Tips to Determine Whether an App is Written in Delphi or Not
This "IsDelphi" program by Bruce McGee will find all applications built with Delphi, Delphi for .Net or C++ Builder that are on your hard drive.
I use WinDowse (a small freeware utility written in Delphi) to spy the windows of the program.. for example if you look at the "Class" TabSheet you can discover the "Class" Name of the control..
For example:
TFormXX, TEditYY, TPanelZZZ for delphi apps
WindowsForms10.XXXX.yyy, for .NET apps
wxWindowsXXX for wxWindows apps
AfxWndXX for MFC/VC++ apps (I think)
I think this is the fastest way (although not the most accurate) to find information about apps..
I understand your curiosity.
You can identify Delphi and C++ Builder apps and their SKU by looking for a couple of specific resources that the linker adds. Specifically RC Data\DVCLAL and RC DATA\PACKAGEINFO. The XN Resource Editor makes this a lot easier, but it might choke on compressed EXEs.
EXE compressors complicate things a little. They can hide or scramble the contents of the resources. Programs compressed with UPX are easy to identify with a HEX editor because the first 2 sections in the PE header are named UPX0 and UPX1. You can use the app to decompress these.
Applications compiled with .Net aren't difficult to detect. Recent versions of Delphi even include an IsAssembly function, or you could do a little spelunking in the PE header. Check out the IsManaged function in IsDelphi.
Telling which .Net language was used is trickier. By default, VB.Net includes a reference to Microsoft.VisualBasic, and VCL.Net apps included Borland specific references. However, VCL.Net is defunct in favour of Delphi Prism, and you can add a reference to the VB assembly to any managed language.
I haven't looked at some of the apps that use signatures to identify the the compiler, so I don't know how well they work.
I hope this helps.
First, look to see what run time libraries it loads. A C program won't normally load Visual Basic's library.
Also, examine the executable for telltale strings. In most executables, this is near the end. If the program uses string constants, there might be a clue in how they are stored.
A good disassembler, plus of course an excellent understanding of the underlying CPU architecture, can often help you identify the runtime libraries that are in play. Unless the exe has been carefully "stripped" of symbols and/or otherwise masked, the names of symbols seen in runtime libraries will often provide you with programming-language hints, because different languages' standards specify different names, and vendors of compilers and accompanying runtime libraries usually respect those standards pretty closely.
Of course, you won't get there without knowledge of the various possible languages and their library standards -- and if the code's author was intent to mask the information, that's not too hard for them to do, either.
If you have available a large set of samples from known compilers, I should think this would be an excellent application for machine learning. I believe so-called "supervised learning" is relevant here. Unfortunately I know next to nothing about the topic—only that I have heard some impressive results presented at conferences.
You might dig through the proceedings of the Working Conference on Reverse Engineering to see if anyone else is interested in this problem.
Assuming this is an application for Windows...
Does Reflector recognize it as a .NET assembly? Then it's MSIL, 99% either VB or C#, but you'll likely never know which, nor does it matter.
Does it need an intrepreter (like Java?)? Then it's Java (or whatever the interpreter is.)
Check what runtime DLLs it requires.
Does it require the VB runtime dlls? Congratulations, VB from VisualStudio 6.0 or earlier.
Does it require the Delphi dlls? Congratulations, Delphi.
Did you make it this far? C/C++. Assume C++ unless it requires msys or cygwin dlls, in which case C has maybe a 25% chance.
Congratulations, this should come out correct for the vast majority of Windows software. This probably doesn't actually help you though, as a lot of the same things can be done in all of these languages.
IDA Pro Free (http://www.hex-rays.com/idapro/idadownfreeware.htm) may be helpful. Even if you don't understand assembly language, if you load the EXE into IDA Pro then its initial progress output might (if there are any telltale signs) include its best guess as to which compiler was used.
Start with various options to dumpbin. The symbol names, if not carefully erased, will give you all kinds of hints as to whether it is C, C++, CLR, or something else.
Other tools use signatures to identify the compiler used to create the executable, like PEiD, CFF Explorer and others.
They normally scan the entry point of the executable vs the signature.
Signature Explorer from CFF Explorer can give you an understanding of how one signature is constructed.
It looks like the VC++ linker from V6 up adds a signature to the PE header which youcan parse.
i suggest PEiD (freeware, closed source). Has all of Delphi for Win32 signatures, also can tell you which was packer used (if any).
I need to develop a simple Windows application with 6 or 7 forms. Its main purpose is to manage files and launch a external program.
These are my wishes, in descending importance order
Free
Be Visual, I mean, the possibility to paint forms and object in the screen.
Possibility to carry it in a USB pen-drive.
I need a light/small size language, not a very complex one. My program is going to have very few forms and its functionality is simple.
Is there any language that meet this wishes? If not, is there any commercial one?
I would use Visual C# Express if I were you.
As others have suggested, C# isn't a bad choice.
Personally I'd use wxPython. If you want a GUI to help you lay out the forms, wxDesigner is very good.
Take a look at Visual Basic Express. IMNTBHO, the learning curve for VB.Net is shallower than the C# equivalent.
Failing that (as much as it pains me to say this) take a look at MS-Access (and a runtime install for carrying it around with you). It's not free, but it's also not terribly expensive. The learning curve is even shallower than VB.Net.
You mentioned wanting your program to be portable on a USB drive, so the previous answers suggesting C# and VB.Net are good as long as all of the machines you'll be using your program on have the .Net framework installed.
If you need to run your program on systems without .Net, you'll need to look at programming environments that can either make a native .exe or can wrap scripts in an executable. Which of those is right depends on your needs and programming experience, but I'd take a look at Lazarus/Free Pascal, C++, or Python (with py2exe).
Visual Studio Express editions seems good for your requirement.
Check: http://www.microsoft.com/Express/
Another vote for Lazarus/Free Pascal. It works from stick, and generates (on Windows 32/64/CE) standalone binaries, and you have full access to the windows api and other windwos specific gadgets (COM)
I'd recommend Turbo Explorer. It's a free RAD IDE that'll generate native win32 apps in C++ or Delphi without the need for a managed framework like .NET.
It couldn't be simpler to use. Just drag and drop your components on your form, compile, and run.
I'd ordinarily push for C# or something on the .NET framework but the stipulation of running on a flash disk means you need something that compiles natively. In addition to Lazarus/FreePascal mentioned above you might also want to investigate CodeGear Delphi