Decryption Error : Padding Is Invalid And Cannot Be Removed
Apr 23, 2010
I have been writing a security class in my application, I am able to encrypt the string correctly and without error. However every time when I try to decrypt this string again, i get an error with this as it returns the following Padding is invalid and cannot be removed.
Here is the code:
Public Function DecryptKey(ByVal plainText As SecureString, ByVal key() As Byte, ByVal iv() As Byte) As SecureString
Try
[CODE]...
And it provides a stack trace with:
at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)
[CODE]...
I have found simular issues on web, and most of them say that the IV is not the same the encrypted version, but I can confirm that the IV is the same as they both access the exact same variable.
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Jul 13, 2011
decryption error : Padding is invalid and cannot be removed.
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Mar 19, 2012
I am using RijndaelManaged to encrypt just 4 bytes of data which produces a 16 byte result (i am using a 128 block size). When I try to decrypt these 16 bytes I get the message "Padding is invalid and cannot be removed.". (The base stream of the CryptoStream is a MemoryStream based on just these 16 bytes).
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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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Aug 25, 2009
I'm using this class to encrypt/decrypt a file:
vb.net
Imports System.Security.CryptographyImports System.TextImports System.IO Public Class EncryptFile Private Shared Buffer(4096) As Byte Private Shared _Rijndael As New RijndaelManaged Private Shared _Hash As New SHA256Managed Private Shared _Encoding As New UTF8Encoding Private Shared IV As Byte() = {12, 4, 58, 74, 52, 33, 69, 87, 47, 8, 23, 69, 85, 47, 85, 21} Private
[code]....
When I encrypt a file it gives me no error, but when I decrypt a file it gives me this error: Padding is invalid and cannot be removed. In this line:
vb.net
cStream.Close()
I don't understand why, because I'm using the same IV and the same key, I've even checked the generated hash, and to me, it seems the same.
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May 18, 2009
I've got a site using .netCART. It's running fine in production with Windows Server 2003 and .NET 2.0. On the new server (Windows Server 2008) everything is working except for credit card decryption in the store admin. No errors are being sent, no exceptions thrown, just the encrypted string being output to the screen instead of a decrypted credit card number.
Dim strCCEncrypt As String
strCCEncrypt = Trim(DataRow.Item("CreditCard"))
strCCEncrypt = tools.Decrypt(strCCEncrypt) 'tools is a .netCART utility
[code].....
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Apr 30, 2009
If the input is alphabets such as any string, it works ok but once the input is in numeric such as "177307" the error attached will be prompted out during the decryption process. I've checked that the decryption value for 177307 is "dw==". I suspected that this function does not support numerical values. Is there anyway to fix this problem? Below are the codes and attached is the error
Imports System
Imports System.Security.Cryptography
Imports System.IO
[code].....
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Jan 31, 2010
When I decrypt an encrypted file; it doesn't have the same size in bytes as the original file and the the hash of the file is different.
I get the bytes of the file using File.ReadAllBytes and send to EncryptBytes with the password. Also the same with DecryptBytes.
When I receive the bytes encrypted or decrypted i save them using File.WriteAllBytes.
I need that the decrypted file and original file have the same hash an bytes.
This my code:
Public Function EncryptBytes(ByVal pass As String, ByVal bytes() As Byte)
Dim myRijndael As New RijndaelManaged
myRijndael.Padding = PaddingMode.Zeros
myRijndael.KeySize = 256
[Code].....
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[code].....
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[code]....
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[code]....
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[code]....
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