need criptografy Rijndael 128bit

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please, if anyone has a sample program on the vb or java Rijndael 128-bit? ,
I had already seen examples of applications Rijndael 256-bit, but I can not understand it well.
if anyone can help, I am very grateful ..

Posted 2-Aug-15 21:11pm

Member 11714307

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2 solutions

Solution 1

I would use Google for that. I quick search gave me, for instance: "An implementation of the algorithm AES 128-bit written in Java"[^].

Posted 2-Aug-15 21:44pm

CPallini

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Member 11714307 3-Aug-15 4:23am

I've seen applications
Encrypt / Decrypt Files in VB.NET (Using Rijndael) by Thad Van den Bosch with 256bit, how do I change the order of the application to 128-bit? Thank you ..

Member 11714307 3-Aug-15 4:24am

I've been searching in google, sorry in advance but I am looking design that works like in netbeans or vb 08? thanks before and sorry my english is not good.

Maciej Los 3-Aug-15 5:02am

5ed!

CPallini 3-Aug-15 5:17am

Thank you.

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

Maciej Los · Accepted Answer · 2015-08-02T23:07:00

Solution 3

You did not provide information about your issue. So, it's not possible to provide detailed answer.

Have a look here:
Encrypt/Decrypt Files in VB.NET (Using Rijndael)[^]
RijndaelManaged Class[^]
Rijndael Encryption in VB.NET[^]

Posted 2-Aug-15 23:07pm

Maciej Los

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CPallini 3-Aug-15 5:16am

5.

Maciej Los 3-Aug-15 5:18am

Thank you, Carlo.

Member 11714307 3-Aug-15 6:20am

In this way, I want to create applications based 128bit-Rijndael criptografy using java or vb 08 to have a GUI that can choose the application that created the file as Mr. Thad Van den Bosch - "Encrypt / Decrypt Files in VB.NET (Using Rijndael)", I just 256bit confused how this change to 128bit on the application, because I have tried changing its use sha215 but can not also, please help, this application will I bring on my bachelor exam.

sorry my english is not good

Member 11714307 3-Aug-15 6:25am

how to change to 128bit ?

Thank you before and sorry because many questions

Maciej Los 3-Aug-15 6:34am

You have to change KeySize: https://msdn.microsoft.com/en-us/library/b2kx37tx%28v=vs.110%29.aspx

Member 11714307 3-Aug-15 6:48am

thankyou,only change source code in key :

Dim SHA256 As New System.Security.Cryptography.SHA256Managed
'Declare bytResult, Hash bytDataToHash and store it in bytResult.
Dim bytResult As Byte() = SHA256.ComputeHash(bytDataToHash)
'Declare bytKey(31). It will hold 256 bits.
Dim bytKey(15) As Byte

'Use For Next to put a specific size (256 bits) of
'bytResult into bytKey. The 0 To 31 will put the first 256 bits
'of 512 bits into bytKey.
For i As Integer = 0 To 15
bytKey(i) = bytResult(i)
Next

and change in IV :

'Use For Next to put a specific size (128 bits) of
'bytResult into bytIV. The 0 To 30 for bytKey used the first 256 bits.
'of the hashed password. The 32 To 47 will put the next 128 bits into bytIV.
For i As Integer = 16 To 31
bytIV(i - 16) = bytResult(i)

it's Work. thankyou ..

Maciej Los 3-Aug-15 7:02am

You're very welcome ;)
Cheers, Maciej

need criptografy Rijndael 128bit

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