System.Security.Cryptography.CryptographicException: Length Of The Data To Decrypt Is Invalid?

Jan 4, 2012

System.Security.Cryptography.CryptographicException: Length of the data to decrypt is invalid.

My Code:
' Decrypt textfile with Rijndael encryption
Public

[code].....

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Length Of Data To Decrypt Is Invalid

Dec 29, 2009

I am trying to build an Encryption/Decryption class/extension. I am able to encrypt the data no problem, but when I try to decrypt the data I am getting "Length of the data to decrypt is invalid."

Here is the entire class file.
Imports System.IO
Imports System.Text
Imports System.Text.Encoding
Imports System.Security.Cryptography
Imports System.Runtime.CompilerServices
Imports System.ComponentModel
[Code] .....

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AesCryptoServiceProvider Not Part Of System.Security.Cryptography?

Aug 26, 2009

I 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.

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File Encryption By Using The Imports System.Security.Cryptography?

Feb 16, 2010

I'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?

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Error - SymmCrypto Is A Wrapper Of System.Security.Cryptography.SymmetricAlgorithm Classes

Jul 7, 2010

For 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

[code]....

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.

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.net - Translating C Code Using OpenSSL For Public-key Authentication To VisualBasic.NET Using System.security.cryptography?

Oct 20, 2009

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":

[Code]...

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VS 2010 System.Security.Cryptography - Generate An HTPASSWD File For Server To Secure A Directory

Apr 10, 2012

i wanna generate an HTPASSWD file for my Server to secure a directory. For Crypt im using DesEncrypt Method , here is my Code :

[Code]...

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Cryptography Classes To Encrypt And Decrypt Connection Settings?

Apr 29, 2010

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?

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VS 2008 - Decrypt Data Error "Padding Is Invalid And Cannot Be Removed"

Aug 6, 2009

I'm trying to decrypt some data but I get this error: Padding is invalid and cannot be removed. It highlights the _streamWriter.Close() line. This is the code I'm using to decrypt a file:

[Code]...

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System.Security.SecurityException: System.Security.Permissions.SecurityPermission?

Jul 27, 2010

I am getting the following error message when I try to call this program from a shared drive on our network;

System.Security.SecurityException: System.Security.Permissions.SecurityPermission
at EMAILVB.EmialVB.EmailVB_Load(Object sender, EventArgs e)

[code]....

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Getting An Invalid "Invalid Length For A Base-64 Char Array"?

Sep 9, 2011

where I was encrypting the string and passing it to another web page to decrypt and get the ids to be displayed as a pdf back to the page. I kept getting an invalid "Invalid length for a Base-64 char array". It was then I realised that the string was getting truncated and that the IE Explorer had a size limit for the number of charaters being passes as a querystring.So I think I need to go the route of posting it.But not sure how to go about it.

Private Sub GetReport()
Try
Dim hawbs As String = String.Empty[code]....

The retrieve document then does: the decrpytion gets the data(ids) and pulls the pdfs.

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Security Descriptor Length SECURITY_ATTRIBUTES

May 19, 2010

I am tasked with fixing a service. It is acting like Mutex's are allowing Clients to enter a procedure when it should not. I looked at the security attributes and they are...

[Code]...

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System.Data.SqlClient Error Invalid Object Name 'Person'

Oct 14, 2010

The Visual Basic in System.Data.SqlClient is not filling DataTable named "Person"[URL] Invalid object name 'Person'.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.Data.SqlClient.SqlException: Invalid object name 'Person'.

[code]....

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System.Data.SqlClient.SqlException: Invalid Object Name '#temp1'?

Mar 5, 2009

An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Invalid object name '#temp1'.

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Error - System.Data.SqlClient.SqlException: Invalid Object Name '#temp1'

Dec 10, 2009

An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Invalid object name '#temp1'.

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Invalid Length For A Base-64 Char Array?

Sep 7, 2011

My program gets an encrpyted query string ,decrypts it and then pulls the pdfs in a popup window depending on the values in the string. The issue I am having is I have around 500 ids that I am passing whose pdfs need to be generated, but I keep getting the "Invalid length for a Base-64 char array".

Not sure what I need to do, I have read through the solutions and have done whatever has been said, with replacing the blank with the "+" but I cannot get this to work.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
_CurrentProcName = "Page_Load"

[Code].....

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'Security' Is Ambiguous, Imported From The Namespaces Or Types 'System, System.Net'?

Nov 4, 2010

im making a md5 cryptology for a program, it work in everyform exept this one..

Imports System.Net.Mail
Imports System.Net.FtpWebRequest
Imports System.Net

[code]....

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Subsonic Invalid Cast From System.Int32 To System.Byte[]

Feb 22, 2010

Subsonic 2.2 is throwing the error

subsonic Invalid cast from System.Int32 to System.Byte[]

When I do the following

If template.Content Is Nothing Then
MsgBox("Blank Document")
Else
MsgBox("Document Present")
End If

"template" is a SubSonic object of which it's "content" field is of type Byte()

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System.security.permissions.securitypermission?

Nov 9, 2009

i am getting the error "System.security.permissions.securitypermission" when running the VB application in another machine. i have put the .exe file in the common path and i ran it my machine and it is working fine, but when i tried to run it in the different machine i am getting the error. Can anyone help me out in fixing this error.

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Deployment :: Get The System.security.securityexception Message

Mar 31, 2009

I have made an simple application (.exe). When i run this program local on my machine it works fine. When i run it from an server i get the system.security.securityexception message.

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System.Security.SecurityException And Calling Word From Infopath?

Jan 13, 2012

I am trying trite code that will copy information from an infopath document to a word document that is being used as a template containing only a header and footer. The only reason for the code is becausthe footer (not optional) is too long to be handled by Infopath (which has a 255 character limit) and word can hold the full footer. Following the guidance on

Public Sub CTRL1_5_Clicked(ByVal sender As Object, ByVal e As ClickedEventArgs)
Dim appWord As Word.Application
Dim wrdDoc As Word.Document

[code].....

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VS 2005 Insufficient Security Permissions To Set The System Time?

Jul 8, 2010

I'm working with a vb.net 2005 project that i converted from vb 6.0 last year. It's working fine in windows xp, but on vista and windows 7 i get an error saying 'Insufficient security permissions to set the system time.' Can you think of any way to replicate this error on windows xp? I'm trying to get a windows 7 box setup at work but I was wondering if there was anything I could try with xp in the meantime.

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Application Security: Counting Days Independent Of System Calander ?

Jun 10, 2011

Counting days independent of system calander ?

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Application Security: Counting Days Independent Of System Calendar

Jun 10, 2011

I want to add a feature to my trial version of the application. After first activation, I want to make it limited to 90 days. But I am concerned about user's changing the date of system hence deceiving my application. Is there any possibility to make it fool proof in a way that even if user takes the calender back, application expires after 90 days of first activation? First activation date has been saved in the database.

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Why Is Registry Access Denied - 'System.Security.SecurityException' In Mscorlib.dll

Jan 11, 2010

Trying to read key "HKLMSOFTWAREPoliciesMicrosoftWindowsWindowsU pdateAU" value "AUOptions" and get the following : A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll Error occurs in ReadRegistry key SOFTWAREPoliciesMicrosoftWindowsWindowsUpdate AU : Requested registry access is not allowed. This occurs in my vb.net application when application is run under an account called OPER in the USERS group. The application :

1/is on my PC's hard drive, its not a web app or on a network share

2/is launched via a desktop click

3/ has a manifest specifying executionlevel "AsInvoker"

It does not occur when the Application is run as an Administrator. It does not occur if I read the value with a non .NET program when logged in as OPER whch makes me think it is a .NET problem not a registry permissions problem. Examining "Effective Permissions" shows that my OPER login has query value permission.I need the application to be able to read the key like the non .NET application while running at USERS level.

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Decrypt Sql Data In Mysql 5.0?

May 10, 2012

THIS IS THE SAMPLE OF ENCRYPTED DATA PLEASE HELP ME HOW TO DECRYPT THIS KIND OF ENCRYPTION

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How To Decrypt Data From SQL Server

Dec 15, 2011

Im having a problem in my coding. I am doing a username and password application (sumtthing like a password keeper).

So I have created the interface and i integrated vb 2008 with sql server 2008. So the adding of account and password all went fine.

I have applied aes 128 bits for the password. that means when the user enters a new record for example an email and he click save, the password will automatically be encrypted before it is saved in the database.

now im having a problem where when i want to display the password in the gridview of vb.net (i decided to use grid view to show all the username and password), i am having trouble in decrypting the password column to show the real password to the user.

of course user cant decrypt the password using their brains. so I want to know how to choose dat particular column (password column) and decrypt it before it appears in the gridview.

bcoz now it is appearing gibberish i.e. aes 128 bits. Below i show u some snippet of my codes in encrypting and storing it in the database. [code....]

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How To Decrypt Data That Had Already Encrypted Using MD5

Oct 23, 2011

I'm using this function to encrypt data but how do I decrypt it?

Public Function GenerateHash(ByVal SourceText As String) As String

[code...]

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System.argument Datagridviewcomboboxcell Value Is Invalid

Feb 19, 2009

i encountered a problem but this happened on the client side. In my PC, i don't encounter this error.

The error is: System.argument datagridviewcomboboxcell value is invalid

Is there anyone who encountered this problem? Could the client's PC needs updating on a certain dot net fix?

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Invalid Cast Exception Was Unhandled - Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'

Feb 9, 2012

Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e

[code]....

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