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Cryptest (MFC Style Crypto++ v4.2 Library GUI).

, 6 Jan 2002 CPOL
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A GUI version of the Crypto++ v4.2 Library that was written by Wei Dai.


This article makes use of the Crypto++ Library v4.2, see "Obtaining the Crypto++ v4.2 Library" below...


I developed this for two reasons,

  1. Because I promised in an earlier article, and
  2. I wanted to use the Crypto++ Library components in an application with a GUI.

Below is the GUI that is presented in this demo:

Obtaining the Crypto++ v4.2 Library

To run compile the demo code, you will need to download the Windows version of the Crypto++ Library v4.2 and source files from, and compile it.

Implementation notes

Below you will find out what I did to get this built and working. If you follow the steps below, you will be able to compile/run this example.

  1. Download the Crypto++ v4.2 Library (see link above) & this demo.
  2. Compile the Crypto++ Library (both Debug/Release).
  3. Take the Debug version of the library and rename it to cryptlib42d.lib.
  4. Take the Release version of the library and rename it to cryptlib42r.lib.
  5. Copy the *.lib files to both of the LIB directories where VC++ is installed.
  6. Unzip the demo and put it into a directory of your choice.
  7. Go to the Menu -> Tools | Options | Directory Tab, and enter the directory path where you unziped the Crypto++ Library to.
  8. Go to the Menu -> Project | Settings | Link Tab, and enter the build library (cryptlib42d.lib/cryptlib42r.lib) in the "Object/Library modules" edit box.
  9. Make sure the above library matches the build (*r.lib=Release/*d.lib=Debug) for the Cryptest demo.
  10. Compile the Cryptest demo (do not run it from here).
  11. For the validation portion to work, you need to copy the .dat files from the Crypto++ location to the build directory (Debug/Release).
  12. Go To the Cryptest.exe and execute it from Windows Explorer.
  13. Let me know how it goes!!!!

Now that you have the demo working, let me explain a few things...

I have made the GUI so that it is a bit hard to get it to error (although it is possible!).

I used the following functions in this demo:

  • GenerateRSAKey
  • RSADecryptString
  • RSAEncryptString
  • RSASignFile
  • RSAVerifyFile
  • EncryptString(using DES-EDE in CBC Mode)
  • DecryptString(using DES-EDE in CBC Mode)
  • EncryptFile
  • DecryptFile
  • SecretShareFile
  • SecretRecoverFile
  • InformationDisperseFile
  • InformationRecoverFile
  • GzipFile
  • GunzipFile
  • DigestFile


I notified Wei Dai that I was doing this project and asked his permission to post this at CodeProject. He was kind enough to answer the email and he let me know that this posting was covered in the License.txt file. So, you do not need to bother him with these dumb questions as I did.

A special thanks to Wei Dai for making the Crypto++ Library publically available for us to enjoy it!!!

Known bugs/issues

  • Only tested with Visual C++ 6.0 SP5.
  • Only tested with Windows 2000.
  • NOT tested with WindowsXP (yet).
  • It is not fully tested and debugged.


  • None yet...


  • For you to see TCP forwarding working, you must receive TCP packets on the port specified, otherwise the machine will seem to hang whilst it listens on the port.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Dan Madden
Product Manager
Germany Germany
I have been programming (as a hobby) for 20+ years (Unix C, Scripting, VB, C/C++, C#). I am getting too old to talk about it and been in the Security line of work (both Military/Civilian) for 25+ years.

Comments and Discussions

QuestionI encountered numorous errors during compiling (Crypto++ 5.2.2 is used), what is wrong? PinmemberSstar912-Jan-09 18:29 
AnswerRe: I encountered numorous errors during compiling (Crypto++ 5.2.2 is used), what is wrong? PinmemberJeffrey Walton18-Feb-09 11:48 
GeneralCrypto++ Integration Article PinmemberJeffrey Walton8-Dec-06 19:17 
Generalreproducing your sample PinmemberSamuel gerber9-May-05 5:05 
GeneralLots of errors when I compile the Crypto++ PinmemberROCKISDEAD15-Mar-05 11:17 
GeneralRe: Lots of errors when I compile the Crypto++ Pinmemberli.cao6-Apr-05 22:43 
GeneralMax message length PinmemberPetitjean28-Jan-05 4:09 
QuestionHow to convert HEX to bytes... PinmemberRitcho8-Oct-04 17:45 
Generalv5.1- ElGamal & DSA 2048-bit key generation error Pinmemberniuyanhua11-Jul-04 15:59 
Generalv5.1 Library GUI Pinmemberniuyanhua5-Jul-04 17:47 
GeneralMFC DLL Crypto++ v5.1 Pinsussckmluu11-May-04 3:13 
GeneralRe: MFC DLL Crypto++ v5.1 PinmemberDan Madden11-May-04 3:24 
GeneralRe: MFC DLL Crypto++ v5.1 Pinsussckmluu11-May-04 7:02 
GeneralRe: MFC DLL Crypto++ v5.1 PinmemberDan Madden11-May-04 7:14 
GeneralRe: MFC DLL Crypto++ v5.1 PinmemberDan Madden11-May-04 7:27 
GeneralRe: MFC DLL Crypto++ v5.1 Pinsussckmluu11-May-04 21:52 
GeneralRe: MFC DLL Crypto++ v5.1 PinmemberDan Madden12-May-04 2:55 
GeneralRe: MFC DLL Crypto++ v5.1 Pinmemberckmluu12-May-04 6:24 
QuestionHelp me. How to Gzip string? Pinmemberkempge1-May-04 18:27 
QuestionHow to Gzip a string? PinmemberWatcher_bj30-Apr-04 23:28 
GeneralGreat PinmemberAnthony_Yio14-Apr-04 19:13 
QuestionHow to override the OnOpenDocument() function PinmemberVC ++ master20-Jan-04 7:19 
AnswerRe: How to override the OnOpenDocument() function PinmemberDaniel Madden10-Mar-04 19:52 
QuestionHelp me Please?? Pinmemberxxhimanshu11-Nov-03 21:26 
GeneralMulti thread App (Run time error) Help me. please... Pinmembermuhon10-Jun-03 6:00 
GeneralRe: Multi thread App (Run time error) Help me. please... Pinmemberwinroot1-Mar-04 14:26 
GeneralCompilation Errors - Bench.cpp: PinmemberJPhelps28-May-03 3:59 
GeneralRe: Compilation Errors - Bench.cpp: PinsussAnonymous28-May-03 4:26 
GeneralCompilation Errors: PinmemberJPhelps28-May-03 3:54 
GeneralProblem to copile under vc++7 Pinmemberselecta5-May-03 6:55 
GeneralAbout RSA keys PinmemberpimOOsse14-Apr-03 2:03 
GeneralRe: About RSA keys-importing in .NET Pinmembermarco p6-Aug-03 23:54 
GeneralRe: About RSA keys Pinmemberspeechnovice30-Sep-03 21:06 
Questionwhy occur error ? Pinmemberseok29323-Jan-03 14:35 
AnswerRe: why occur error ? PinmemberDaniel Madden23-Jan-03 20:53 
AnswerRe: why occur error ? PinsussAnonymous28-May-03 14:00 
GeneralECC sample PinmemberAbdulRahman13-Jan-03 21:55 
QuestionDoes it work withe the 5.0 version ? PinmemberSorin Sbarnea29-Dec-02 3:12 
AnswerRe: Does it work withe the 5.0 version ? PinmemberDaniel Madden2-Jan-03 12:03 
GeneralRe: Does it work withe the 5.0 version ? PinmemberpimOOsse31-Mar-03 9:30 
GeneralGreat Work! PinsussAnonymous11-Oct-02 9:01 
GeneralRe: Great Work! PinmemberDaniel Madden22-Dec-02 23:56 
GeneralHi PinmemberVishi04310-Oct-02 4:08 
GeneralRe: Hi PinmemberDaniel Madden22-Dec-02 23:58 
GeneralRe: Help me!! Pinmemberxxhimanshu12-Nov-03 2:06 
GeneralPlease~ HELP ME!!! Pinsussjasmine30-Sep-02 23:47 
GeneralRe: Please~ HELP ME!!! PinmemberDaniel Madden1-Oct-02 0:23 
QuestionHow to use this program with my Objects of a Class PinmemberVishi04324-Sep-02 20:02 
QuestionHow to use Crypto++ in Windows CE? PinmemberBui Huy Kien6-Sep-02 19:09 
AnswerRe: How to use Crypto++ in Windows CE? PinsussAnonymous28-May-03 14:04 

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