I need to make some big multiplications for cryptographic reasons in vb.net and overflow the variable as C,C++ and C# does. I have disabled the check of overflow at the vb.net project but when i an doing those multiplications i get as a result 1.#INF
ex. in c:
z^y= 0xFFFFFFFF ^ 0x000003FC= 0xFFFFFC03
in vb.net:
z^y= 0xFFFFFFFF ^ 0x000003FC= 1.#INF
how can i use the RSA Cryptography in Vb.NET ?i'm looking to how implement the public/private key to protect strings.
View 9 RepliesI realize AesCryptoServiceProvider is part of .NET framework 3.5. I do have 3.5 installed. However, (I can't believe I don't know this), how can I utilized Framework 3.5 so I can access the AesCryptoServiceProvider? Currently, it points to 2.0.
View 2 RepliesI have a file called Test.txt with a one line of String equal to 'This is String', and I've created a command line argument to compare the MD5 results, why am I not getting a match?
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I have used System.Security.Cryptography classes to encrypt and decrypt connection settings but have a question regarding securing the private key needed to decrypt. Given that assemblies can be easily read, what is the preferred method for storing the private key so that it is not visible to anyone who goes looking?
View 1 RepliesI'm working on a basic file encryption by using the Imports System.Security.Cryptography.I was thinking of putting a password as a final security measure.Would i have to store the password inside the file or how will this work?
View 12 RepliesFor my applications I use the following class:
Imports System.Security.Cryptography
Imports System.IO
Imports System.Text
'SymmCrypto is a wrapper of System.Security.Cryptography.SymmetricAlgorithm
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Most of the time this works as it should, but sometimes it encodes a string and the gives an error on decoding it. The error message is: Invalid length for a Base-64 char array.
System.Security.Cryptography.CryptographicException: Length of the data to decrypt is invalid.
My Code:
' Decrypt textfile with Rijndael encryption
Public
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I am trying to mimic the results of some C code that uses the OpenSSL library using the system.security.crytography library in the .net 3.5 world, and I can't seem to get it right. part of the issue is my understanding of crytography in general.
Here's what is supposed to happen:
I send a request for authentication to a device.It returns a challenge digest, which I then need to sign with a known key and return The device returns a "success" or "Fail" message.I have the following code snippet that I am trying to "copy":
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i wanna generate an HTPASSWD file for my Server to secure a directory. For Crypt im using DesEncrypt Method , here is my Code :
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What I want to know is that in VB.net is it possible to get a stack overflow, and if so how is it caused. What I mean is, what sort of written code would cause a stack to overflow.
View 2 RepliesI was wondering, in a toolstrip there is an overflow option
View 3 RepliesI've never seen this error before; and apparently (According to DIC) the number would have be bigger than -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807, to this this exception (I'm using an Integer, but I've tried Int64, and the same thing happens).
This is where the exception is being thrown:
Dim localPort As Integer = (tcpRow__1.localPort1 << 8) + (tcpRow__1.localPort2) + (tcpRow__1.localPort3 << 24) + (tcpRow__1.localPort4 << 16)
Full Code (Method)
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I highly doubt that that the integer that is being parsed back is greater than, either of those numbers listed above. I've tried using Int64, and even removing the << operator, but it's still throwing this exception.
I get an 'overflow exception was unhandled' error in the following code.
It is a function to combine 2 bytes into a 16 bit integer.
Private Function MakeInt16(HiVal As Byte, LoVal As Byte) As Short
Dim h As UInt32 = HiVal * CUInt(256) + LoVal
Return CShort(h)
End Function
I am getting an overflow somewhere while populating my database.The number of records inserted is different every time I get the error and I have been unable to trace where it is coming from.
View 7 Repliesthis exception gets raised on a standard dim command???
Public Sub Life(ByVal AnyEvent As Object) Dim myNewLife As New Life Dim Happiness As New Collection Happiness.Add(AnyEvent) myNewLife.Experience(Happiness) End Sub
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I am making a program that reads files (exe and dll) and compares them byte for byte and then save the diffrences.when i read the file it crashes. when the binary reader reaches position 3 (RAW offset 0x03) it crashes with the sentence: Arithmic operation resulted in an overflow. I tried different files and its always at position 3.[code]
View 5 RepliesI need to overflow text of a cell that has too much data. I can't easily split it up into multiple cells so I guess the only choice now is to overflow it, but I just cant seem to find a way to do it.[code]...
View 1 RepliesThis is driving me crazy. have been looking at it for several hours now. So I have an xml file which is transformed via xslt into output for a web site. first I use an asp.net statement to pull in the xml
<asp:Xml ID="Xml1" runat="server" DocumentSource="~/xml/Ax.xml"
TransformSource="~/xml/XSLTFile.xslt"></asp:Xml>
then I use xslt to transform
<xsl:template match ="Ax">
<table class="outputTable" >
<tr>
[code]....
I can't prevent the table from expanding beyond the normal row height to stack text in a cell. It wraps text if strings are too long. I have tried everything and nothing is working. I have tried using overflow:hidden + height; i have tried text overflow ellipsis?
We have a VB application, which will get input from the user, post it to HTTP url and get the result from it, assigns it to objects and displays it to user.
In this flow, users are getting Run-Time error 6(Overflow). But this is not happening all the time. Iam not able to reproduce also?Would there be any other reason for this, apart from normal reasons like assinging a higher value to lower datatypes.
I'm trying to make a grade calculator that can determine the minimum grade you need to acheive a desired grade. I'm new to visual basic, and I'm trying to figure out why I keep getting the run-time error '6' message. I tried declaring the variables as variants instead of doubles to fix the problem, but it didn't seem to work. When I click "debug" the red statement is highlighted.!
Private Sub CommandButton1_Click()
'***************Declare all variables**************************
Dim ClassSubject As String
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I received this error when im trying to save the date in my database.
SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM. Description: An unhandled exception occurred during the execution of the current web request.[code]...
I'm writing this program in Visual Basic .NET to organize different fields of data, and I'm using profile slots through application settings to store the data for users. But, I ran into a stack overflow error in my SlotSelect.vb class. My best plausible guess for why this happens is that I'm using the wrong kind of variable container in the below sauce code, but my dilemma is that I don't know what specifically is going wrong.The code that the vshost is saying is the cause for the overflow was written from some code that I looked up on MSDN and other places for referring to objects in other classes, and I tried using other variants of it to see if it was any different. So far, nothing has worked, and it doesn't stop the error while compiling, much less in the code markup--it only catches it when it starts the application in debug after it finishes building
View 7 Repliesi finished a project ive been working on for weeks or well i thought i had finished it.. in VS debug environment it runs fine doing its logics for hours without a problem but after publishing it as a standalone it starts throwing errors pretty soon. Took another look at whats going on in VS debug and the only thing that stands out is "A first chance exception of type 'System.OverflowException' occured.." that pops up every now and then so i think this is whats crashing my program outside vs. This poses 2 problems a) the code is around 2k lines/3 classes and heavily multithreaded and i have no clue where exactly this error gets generated, b) from my previous encounters with first chance exceptions they seem like more "possibility for error" instead of an actual error itself and very hard to track down
View 1 RepliesOk so in my code i need a ****ing long as equation to draw a certain paint for getting the distance of a particle using the terminal velocity equation. which looks like this...
var.vt = ((2 * var.m * var.g) / ((var.fluiddensityp) * var.apaos * var.dragcoef)) ^ (1 / 2)
then pop that in here to get terminal velocity at a given time...
= var.xvalgraph1 * ((var.g * var.fluiddensityp * var.dragcoef * apaos) / (2 * var.m)) ^ (1 / 2)
terminalvelocityovertime = vt * Tanh(tanhx)
then as I'm drawing a graph i calculate the previous coordinate and join then with a line.so i need a value called previous which is where ever there is a var.xvalgraph1 it minuses what ever time increments have been set so alll var.xvalgraph1 turn to (var.xvalgraph1 - var.timeperpixel)
ok thats all fine this is where the equations get too much and i don't work
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Why a variable defined as a long will not accept this number (2,148,532,224) with out throwing an exception of "Arithmetic operation resulted in an overflow." Looking at documentation it should be able to handle a value up to 9,223,372,036,854,775,807.
My code does some simple calculations and then tries to store the value in the variable.
Dim mdblTotalFileSize as Long = GetImageSizeBlocks * GetBlockSize
The value for GetImageSizeBlocks is 1049088 and the value of GetBlockSize is 2048 which equals 2148532224
could you tell me, why I get the stack overflow error on this code?
Dim ev As Double = datum.Year * 365 * 24 * 60 * 60
Dim honap As Double = datum.Month * 30 * 24 * 60 * 60
Dim nap As Double = datum.Day * 24 * 60 * 60
Dim masodpercek As Double = ev + honap + nap
The double datatype should be enough.
I am creating a list of dates between two dates and inserting that list into a DB like this:
Dim SDate, EDate, iDate As
Date
Dim DateString
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When I use some StartDates and End Dates like 04/11/2009 and 06/11/2009 it works fine and I am able to get the info into my DB. However; when I use other dates like 04/11/2009 and 13/11/2009, I get the following error:
Arithmetic overflow error converting expression to data type datetime. The statement has been terminated.
I cannot open and read files larger than 32k. This sub is used by both user-dialog and drag-drop operations. Files smaller than 32k are processed without error. Files greater than 32k result in the ErrorOpenFile warning with "Overflow" as the err.Description being displayed.
Public Sub SendFile(ByVal sendFileName As String, terminalWindow As Form)
Const MSG_TITLE = "Send File"
Dim asciiCode As Byte
[code]....
I have created quite a few web chats using VB.NET and ASP.NET and I'm just wondering how Stack Overflow handles messages being sent back to clients. Because web can only make requests and get responses back once, how does Stack Overflow handle messages? In my implementation I have a recursive loop that gets called every 1 second and makes an Ajax request to the server to get the latest messages, but I am thinking of using web services
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