Using wodCrypt to encrypt a local file
For a copy of the sample project please
click here
to download and install the product evaluation.
Introduction
wodCrypt is a lightweight component that provides strong encryption for your applications. Whenever you need to secure your transactions, wodCrypt's cryptography can be used. It provides support for most common crypto algorithms.
Detail
P>Our demonstration code illustrates a case in which we take a local
file, and encrypt it using the Blowfish algorithm. The whole process
is done in three easy steps.
The steps include declaration and initialization of objects, setting
the parameters, and encrypting.
Set up
Download and run the executable using the above link. The samples will
be placed in the directory C:\Program Files\WeOnlyDo.Com\Crypt\Samples.
There are example projects included for C#, VB, ASP, Delphi, VC and VBS.
In the VB6 project, add a reference to wodCryptCOM
and event handlers will be provided by the development environment.
In C#, wodCrypt is referenced as WODCRYPTCOMLib, and
the all the necessary code is in Form_Load Event.
VB6
Dim wodCrypt As wodCryptCom
Dim InFile As FileBlob, OutFile As FileBlob
Set wodCrypt = New wodCryptCom
Set InFile = New FileBlob
Set OutFile = New FileBlob
C#
WODCRYPTCOMLib.wodCryptCom wodCrypt = new WODCRYPTCOMLib.wodCryptCom();
WODCRYPTCOMLib.FileBlobClass InFile = new WODCRYPTCOMLib.FileBlobClass();
WODCRYPTCOMLib.FileBlobClass OutFile = new WODCRYPTCOMLib.FileBlobClass();
The first step is to declare and initialize our objects that we will
use to achieve our goal. The code shown above is all you need for
this step.
The settings
In order to perform the encryption we need to "tell" the component
to perform the encryption using "Blowfish" algorithm, as well as pass it
the file that will be encrypted.
VB6
InFile.FileName = "input.filename.goes.here"
OutFile.FileName = "output.filename.goes.here"
wodCrypt.Type = Blowfish
wodCrypt.SecretKey = "secret"
wodCrypt.Optimized = False
C#
InFile.Filename = "input.filename.goes.here";
OutFile.Filename = "output.filename.goes.here";
wodCrypt.Type = WODCRYPTCOMLib.CryptoTypes.Blowfish;
wodCrypt.SecretKey = "secret";
wodCrypt.Optimized = false;
In the above code, the input file (the file that we wish to encrypt)
is set thru FileName property of the InFile object. The Output
file (the file that will hold the encrypted data) is specified in FileName
property of OutFile object. The Type parameter specifies the encryption
algorithm that we want to use, SecretKey is the password (can be used
later for decryption). Optimized determines if we want other components/libraries
to be able to decrypt the file or not.
The Final step
All we need to do now is call the Encrypt method:
VB6
wodCrypt.Encrypt InFile, OutFile
C#
wodCrypt.Encrypt((WODCRYPTCOMLib.Blob)InFile,(WODCRYPTCOMLib.Blob)OutFile);
Once finished, the output will be in the file specified as FileName
property of the OutFile property, and will be encrypted.
Summary
This simple demonstration shows an easy way to encrypt
a file in three simple steps by using wodCrypt.
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WeOnlyDo! Inc.
for more information and more samples.
