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'Encryption/Decryption with .NET' Modified (Frank Fangs' Code) CCW and VB

Dan Elebash

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19 May 2002

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Modified version of Frank Fang's code ported to VB and made CCW.

Download source files - 26.9 Kb

Introduction

This is a modified version of "Encryption/Decryption with .NET" by Frank Fang. This version has been ported to VB and is also a CCW. A COM Callable Wrapper allows you to use the .NET class in VB 6.0.

I have included two tester applications, just forms that you can use to test the encryption/decryption. The key is hard coded, you can change it in the form variables.

Here is a link to the original author's submission: Encryption/Decryption with .NET.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

Written By

Dan Elebash

United States

This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

vengadanathan22-Jan-07 19:41

22-Jan-07 19:41

Smile | :)

ok

ragavan

socket programming

Member 14138373-Oct-04 21:34

3-Oct-04 21:34

Can u help me to make two computer talk using vb.net. Tkank you.

Error: Bad Data

LuckyWolf1911-Dec-02 9:57

11-Dec-02 9:57

If you try to encrypt this string:

91448Brian80903 or
14535Brian51402

the resulting decrypt will result in an error message "Bad Data" at:

Return sr.ReadToEnd()

The resulting encrypting for the above strings is here:

91448Brian80903 encrypts to rh4/ag==
14535Brian51402 encrypts to Q8lHd+8=

Can anyone offer a fix to this problem?

LuckyWolf19@hotmail.com

Re: Error: Bad Data

Dan Elebash12-Dec-02 4:54

12-Dec-02 4:54

Check Frank Fangs original article I think he posted an update to fix this problem in his c# version you can probably find out where it is and just replace that piece of code.

Re: Error: Bad Data

TienDT29-Jan-04 23:48

29-Jan-04 23:48

I hope you repaired this errors
Please mail for me. Ok
Thank you very much

jimtxas20-Nov-02 3:43

20-Nov-02 3:43

OMG | :OMG:

I'm trying to register the cryptovb.dll and it will not register....anything special I need to do? It keeps telling me that it is not found....

Tks,
J. Newman

Dan Elebash20-Nov-02 6:00

20-Nov-02 6:00

I didn't have any problems registering it, I let VS.Net register the component by checking register for com interop under Build for project properties. However if the component is not signed correctly I don't think it will register.

Hardcoded signature key?

RBP1-Oct-02 5:52

1-Oct-02 5:52

Looking through the solution I noticed a hard coded link for a signature key. Any comment on that?

Re: Hardcoded signature key?

Dan Elebash1-Oct-02 5:58

1-Oct-02 5:58

Lazy

Smile | :)

, just left it in for example, you should probably make it a key lookup in config file. Only need the signature key if you are using it as com component.

How to use the Cryptovb.dll in VB 6.0?

bryanli26-May-02 17:17

26-May-02 17:17

Could you tell me in details! Thank you very much! Cry | :((

Cry | :((

Re: How to use the Cryptovb.dll in VB 6.0?

Dan Elebash27-May-02 5:58

27-May-02 5:58

Note: This is if you want to use CCW, just using it in VB.Net should be straight forward.

A good reference in VS.Net search for COM Interop Part 2: C# Server Tutorial

1) create key pair see help topic "Creating a Key Pair"
To create a key pair

At the command prompt, type the following command:
sn –k <file name="">

In this command, file name is the name of the output file containing the key pair.

The following example creates a key pair called sgKey.snk.

sn -k sgKey.snk

2) Open the Cryptovb.sln
Change the crypto.vb <assembly: assemblykeyfile("e:\sgkey.snk")=""> to point to the key file you created in step 1

3)View properties of Cryptovb project, choose configuration properties, then build, then check the box for Register for Com Interop, then build the solution.

This finishes the Server side

VB 6.0 Client Side
1) open CCWCryptovb.vbp
2) Add a reference to the Crypto.dll this should be registered now, that was what the Register for Com Interop check box did when you built the server side
3) Run the sample project.

Hope this is what you are looking for.

Re: How to use the Cryptovb.dll in VB 6.0?

bryanli27-May-02 19:41

27-May-02 19:41

It works,thank you very much!

Big Grin | :-D

Big Grin | :-D

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