What is done in the following code of encryption?

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VB

Private Function Encrypt(clearText As String) As String
        Dim EncryptionKey As String = "MAKV2SPBNI99212"
        Dim clearBytes As Byte() = Encoding.Unicode.GetBytes(clearText)
        Using encryptor As Aes = Aes.Create()
            Dim pdb As New Rfc2898DeriveBytes(EncryptionKey, New Byte() {&H49, &H76, &H61, &H6E, &H20, &H4D, _
             &H65, &H64, &H76, &H65, &H64, &H65, _
             &H76})
            encryptor.Key = pdb.GetBytes(32)
            encryptor.IV = pdb.GetBytes(16)
            Using ms As New MemoryStream()
                Using cs As New CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write)
                    cs.Write(clearBytes, 0, clearBytes.Length)
                    cs.Close()
                End Using
                clearText = Convert.ToBase64String(ms.ToArray())
            End Using
        End Using
        Return clearText
    End Function

[edit]Code block added - OriginalGriff[/edit]

Posted 11-Jul-14 7:48am

Member 10940701

Updated 11-Jul-14 8:02am

OriginalGriff

v2

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OriginalGriff 11-Jul-14 14:03pm

Well, you wrote it - so what do you think it does?

Member 10940701 11-Jul-14 14:15pm

friend i know it doeses encryption but i want to know how i just copied the code from somewhere because i want to use encryption in a simple data interacting software

2 solutions

Solution 2

I think this article, where the exact code seems to have originated, explains it:

http://aspsnippets.com/Articles/AES-Encryption-Decryption-Cryptography-Tutorial-with-example-in-ASPNet-using-C-and-VBNet.aspx

Posted 20-Mar-15 12:45pm

Member 11542549

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phil.o 20-Mar-15 20:18pm

What is the point to dig out a 9 months old question that has been marked as answered?

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OriginalGriff · Accepted Answer · 2014-07-11T08:20:00

Pretty much, there are two ways to explain what is done:
1) "It encrypts data"
Or
2) Explain the code line by line, because it's quite involved for a beginner.

Do you have any idea how much work explaining code line by line is?
Every single line needs a paragraph of explanation! For example:

int next = r.Next();

Create a new variable called "next" which can hold a integer value. From the previously declared Random instance "r", call the "Next" method to get a new random number, and assign it to the "next" variable.

Can you imagine how long it would take us to explain even a very short code fragment like your example, line by line?

If you have a specific problem, then ask a question about it. But think first - would you want to sit down for 45 minutes and type up a line-by-line description for no good reason?

So, you either need to find a book on encryption, or start by using Google and MSDN to follow what each of the classes and methods used does, how it does it, and how it is used.
But nobody (except possibly the author of the code) is going to explain that to you in the depth you want.