VS 2008 Block Sizes For Rijndael And AES Managed?
Aug 17, 2009Do both of these algorithm work only with a 128bit size block size?
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How Secure Is VB Rijndael Managed Encryption Or AES
Feb 11, 2012I am using a slightly modified version of this code. to create a mission critical application. That files that will be encrypted are very important. This has to be done from scratch because there are some other things that has to be done along with this. How secure is this? Its impossible to crack this encryption right? [Code]
View 2 RepliesRijnDael Encryption/decryption - Select The Key Bytes And The Block Bytes From The Numeric Up/down?
Nov 13, 2010I want it to do is that you input a string, then you select an algorithm (Theres only going to be one RijnDael) then you input a key, then the Initialization Vector comes from "txtIV.text" then you select the key bytes and the block bytes from the numeric up/down, then you either encrypt or decrypt.
View 1 RepliesVS 2008 - Difference Rijndael Vs RijndaelManaged Class
Aug 6, 2009What's the difference? I'm going to create a password encrypting program, and I wanted to know what's the basic difference about the managed class and the "not managed" class.
View 4 RepliesDispose Managed Objects In 2008?
Jun 1, 2011In My application, I have an MDI form. From MDI form I open all forms as child forms. I have implemented IDisposable for all large objects like file stream DB connection etc. In the Form_Disposed event I dispose all unmanaged objects. After the child form is closed, all unmanaged objects are disposed but managed objects (controls and form) are not disposed and still in memory. I find it from .Net Memory Profiler ([URL]).
So I have write code to remove all event handlers of all controls and form. Now, When form closed, dispose is called and all event handlers and controls are disposed, but controls and form are still in memory.
VS 2008 Initializing Managed DirectDraw?
Jan 23, 2010I am initializing direct draw by the following:
vb
GraphicsCard = New Device
GraphicsCard.SetCooperativeLevel(Me, CooperativeLevelFlags.FullscreenExclusive)
Dim description As SurfaceDescription = New SurfaceDescription
surface to DirectX
Now the above works fine... for a fullscreen direct draw app...however i want to make a non-fullscreen app... how can i do that?I have tried several things with no avail and i also want the app to keep drawing when it does not have focus?
VS 2008 Removing Characters - Re-sizes Items In An Array
Dec 10, 2009I have a program that re-sizes items in an array but I can't get it to work. I have:
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It gets to the Remove but it just doesn't delete the characters from the string.
VS 2008 - Setting Form Sizes According To User Screen Resolution
Mar 17, 2011I'm setting form sizes according to user screen resolution and I think I need design no smaller than 1024 x 768 these days. Using the following code I set my first form and use Anchor settings to resize and maintain controls. Does resize affect StartupPosition in other forms and what do you think is the best StartupPosition to Show the next (smaller) forms? I have a feeling I should have created child forms but simply added forms to the project as I needed them. For example, the first code example does not take account of the WIN7 Task Bar.
HTML
Dim x As Integer = My.Computer.Screen.Bounds.Width, y = My.Computer.Screen.Bounds.Height
Me.Size = New Size(x, y)
A smaller form loads with the same code slightly varied, but the reduction is not taking account of the screen resolution. Is there a way of reducing by percentage?
HTML
Dim x As Integer = My.Computer.Screen.Bounds.Width, y = My.Computer.Screen.Bounds.Height
X = X -100
y = y - 100
Me.Size = New Size(x, y)
.Net And PHP Rijndael Encryption Not Matching?
Sep 12, 2011At first i thought it was the padding since mcrypt uses zero padding but i changed the php to use PKCS7 and get the same exact results.I think it has something to do with the padding in the php.Test output from .Net:
Key: d88f92e4fa27f6d45b49446c7fc76976
Text: Testing123
Encrypted: /DMkj7BL9Eu2LMxKhdGT+A==[code]......
C# :: Generate Rijndael KEY And IV Using A Passphrase?
Jun 26, 2011How to generate Rijndael KEY and IV using a passphrase? The key length must be in 256 bits.
View 5 RepliesUse Rijndael Object In Program?
Apr 20, 2010I'm trying out the Rijndael to generate an encrypted license string to use for our new software, so we know that our customers are using the same amount of apps that they paid for.[code]...
View 3 RepliesEncrypt (using Rijndael) A String To A File?
Dec 16, 2009I've attempted using code snippets as a test to encrypt a string, save it to a file & the reload it back, decrypting it. I consistently get a "Padding is invalid and cannot be removed." error on decrypting the string.
View 3 RepliesOK To Use Static IV Value In Rijndael Encryption For Many Files?
Sep 3, 2011My current approach of using Rijndael is to use a pair of static Key and Iv for all encryption operations (I mean I use this pair of Key and Iv for all protected files in my computer).
I heard that IV must be unique for each Rijndael encryption. Is that true? What is the problem (if any) for my current approach of using single static Key and Iv pair?
Using Rijndael (as AES Algorithm) For Encrypting - Symmetric Key
Sep 13, 2011Im using Rijndael (as AES algorithm) for encrypting. I encrypt the values (objects properties) and serialize the object to xml an dsend the xml to the receiver via a web service. I want to pass along the encrypted symmetric key that I used to encrypt the data. But what key should I pass along?
My decryption algorithm looks like this (vb.net):
CODE:
If I want to decrypt the encrypted string I have to use both key and IV, but I think I have to pass along only a key value. Do I have to do this another way or what should I pass along? My specification says that the values have to be encrypted using AES and a 128 bits key.
VS 2005 ReEncrypt File In Memory Using Rijndael?
Oct 15, 2009I have spent quite a while trying to solve this problem.I would like to be able to decrypt a file using an old password, then encrypt the file with a new password in memory. I could easily write the unencrypted file to disk then encrypt the file with a new password, BUT I was trying to keep the unencrypted file from being written to disk. Could someone point me in the right direction?
Private Function ReEncryptFile(ByVal PathToFile As String, ByVal OldPassword As String, ByVal NewPassword As String) As Boolean End Function I've been using a cryptostream to decrypt the file, but I cant seem to figure a way to encrypt the crytostream afterwards (or convert it to a memorystream and (re)encrypt the memorystream)
.net - Rijndael Encryption Code Is Not Working For Large File?
Oct 1, 2011I use the following Rijndael code to do encryption without fail for many times. But why it can not encrypt an ISO file with 4.2 GB? In fact my computer has 16GB memory and it should not be a memory problem. I use Windows 7 Ultimate. The code is compiled as winform (.Net 4) using Visual Studio 2010 (a VB.NET project).
I have checked that the ISO file is OK and can be mounted as virtual drive and even can be burnt to DVD rom. So it is not the ISO file problem.My question: Why the following code cannot encrypt an ISO file with size of 4.2GB? Is that caused by the limitation of Windows/.NET 4 implementation?
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Decrypt A Datetime.Now.Day String Stored In Registry Using Rijndael
Jun 2, 2012I recently have been developing a app that uses the rijndael encrypt and decrypt function it stores dates in the registry (encrypted with a key using the algorithm)
for example Dim strOldDay As String = Key.GetValue("UserSettings", "").ToString the key was made using a private function called "createkeys"
example:
dim current as currentdate
Current.Day = DateTime.Now.Day.ToString
Current.Day = Encrypt(pPassPhrase, Current.Day)
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Where Is The Proper Location To Embed IV Information For File Encryption Using Rijndael Algorithm?
Sep 29, 2011I'm creating a Rijndael file encryption application. I will using a unique IV for each file encryption.
My question: Where is the proper place to embed the IV info?
My initial thought is to append it at the end of the file's content. Is that a good choice?
Block Ctrl Key Using VB 2008
Nov 26, 2009im doing a login i have finish it but you can close it by using alt+f4 so i need to block the alt key im using vb 2008
View 2 RepliesVS 2008 Possible To Block Sites?
Aug 13, 2009I'm making a program but I don't want people to abuse it, it loads a site and then refreshes it. People can abuse this by getting views for a game and what-not. What code can I use so that the webbrowser only loads the homepage and not some thing like
View 4 RepliesVS 2008 Block Of Code In An Application
Oct 2, 2009I have a block of code in an application I have written. I have tried two different variations.Below are examples of the method I used: [code]
The second example adds only three more lines of code. Yet, the app would run at about 10% of the speed as it would in the first sample.
VS 2008 How To Block The Computer During A Save
Aug 2, 2010How can i make the computer to block while the user is doing a save to the application i'm building?
View 5 RepliesVS 2008 Improve On Block Of Code?
Jun 13, 2009I have this block of code that splits txt/csv files. It is working just fine but its a but "ghetto"
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VS 2008 Web Browser Block List?
Aug 30, 2010I want to create a block list for my web browser project. I want to create a listbox that the user can add websites to then when the web browser is ran on the main page if the web browser try's to connect to a web page that's in the list box it will be redirected? I've tried using this code :
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IDE :: Highlight A Block That Is Excluded By #if #endif In 2008 SP1 As It Is In C# And C++?
Jun 29, 2009When I exclude a block using #if #endif in VB.Net there is no visual evidence that the block has actually been excluded unless I indent the block and it does not return to the left margin. I checked the active settings for Fonts and the Excluded Code colorization is identical to that of C# and C++. However, the block is not colorized at all. VB clearly knows the block has been excluded, but I cannot figure out how to get the block highlighted as it is in C# and C++.
View 3 RepliesVS 2008 Does It Exists Something Like Command Timeout Block
Nov 1, 2009Sometimes my MySQL-commands hangs forever without throwing any exception. I've tried setting both command- and connection timeout for my connector, but it still hangs sometimes.Does it exist some kind of timeout block? Like, if the command hasn't been executed within X seconds, then continue.
View 2 RepliesTablelayoutpanel Even Row Sizes?
Aug 9, 2010when the form loads, there is a table and i use code to set the row count to a variable from a previous page. this works fine. the problem i am having is that i cant get the row height sizes to be evenly spaced, there is 1 huge row then heaps of tiny ones
View 4 RepliesKeep Form Sizes The Same In Different Resolutions?
Apr 9, 2012I have written a VB .NET 2010 application which displays a "you have new mail" window/form with an OK button that closes the form.
Some users have received new PCs with dual-monitors and the OK button is no longer visible on the form - it's at the bottom but off-form.I guess that this is related to a different screen resolution and not the dual-monitor setup itself.how to make my forms auto-resize? I though this was automatic in VS 2010.
Listbox Items With Different Sizes
Feb 22, 2010I need listbox with few items in my project and I want each item to shown in different font size. Example is the VbCity editor FontSize box.
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RadioButton - Only Use A Couple Different Sizes
Jan 9, 2011Is it possible to have radio buttion 1 control this code and have radio button 2 control the same code with different sizes? If this can be done it will get me buy until I learn a better way. It is a small envelope app, someday I will add a database to it too hold all my address. Right now I only use a couple different sizes.
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