Bad Data Error Asp.net

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up “Bad Data” CryptographicException up vote 5 down vote favorite 2 First, I have only written the code below for academic purposes. The reason I say this is because I am not putting this in a production environment, and therefor am "bypassing" some of the overhead that I would need to do if I was, I simply need to be able to encrypt/decrypt a string using the code below. I was able to do it a few time, but for some reason, I started receiving "CryptographicException Bad Data" and am not sure what might be causing the problem. private string RSAEncrypt(string value) { byte[] encryptedData = Encoding.Unicode.GetBytes(value); CspParameters cspParams = new CspParameters(); cspParams.KeyContainerName = _rsaContainerName; using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams)) { encryptedData = RSA.Encrypt(encryptedData, false); return Convert.ToBase64String(encryptedData); } } private string RSADecrypt(string value) { byte[] encryptedData = Encoding.Unicode.GetBytes(value); CspParameters cspParams = new CspParameters(); cspParams.KeyContainerName = _rsaContainerName; using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams)) { encryptedData = RSA.Decrypt(encryptedData,false); return Convert.ToBase64String(encryptedData); } } It is only throwing this exception on the RSADecrypt call. Any ideas? I read somewhere it might have to do with the expected size of encryptedData that is passed into RSA.Decrypt. Thanks } c# encryption cryptography rsa share|improve this question edited Mar 11 '12 at 23:48 asked Mar 11 '12 at 23:17 TheJediCowboy 2,1111672130 Uh, how are you passing the keys between the methods? –Maarten Bodewes Mar 12 '12 at 19:50 add a comment| 3 Answers 3 active oldest votes up vote 10 down vote accepted Convert the plaintext back and forth using a string-encoding (i.e. Encoding.Unicode). Convert the encrypted data back and

ASP.NET Community Standup Forums Help Home/ASP.NET Forums/General ASP.NET/Web Forms/Error :Bad Data Error :Bad Data [Answered]RSS 8 replies Last post Apr 29, 2013 09:31 AM by Mohammed Saleh ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Related Links GuidanceSamplesVideos Reply Mohammed Sal... Member 54 Points 439 Posts Error :Bad Data http://stackoverflow.com/questions/9659898/bad-data-cryptographicexception Apr 25, 2013 04:19 AM|Mohammed Saleh|LINK Public Function Readconnectionstring() As String Try Dim secretkey As String = "Employee" Dim sr As New StreamReader("C:\connection\tcon.txt") Dim Server As String = sr.ReadLine() Dim database As String = sr.ReadLine() Dim userid As String = sr.ReadLine() Dim password As String = sr.ReadLine() sr.Close() http://forums.asp.net/t/1901564.aspx?Error+Bad+Data Dim ds As String = Decryption(Server, secretkey) Dim db As String = Decryption(database, secretkey) Dim uid As String = Decryption(userid, secretkey) Dim pass As String = Decryption(password, secretkey) cons = "Data Source =" & ds & "; DataBase =" & db & "; User Id =" & uid & "; Password =" & pass & ";" Catch ex As Exception MsgBox(ex.Message) End Try Return cons End Function Private Function createdes(ByVal key As String) As TripleDES Dim md5 As MD5 = New MD5CryptoServiceProvider() Dim des As TripleDES = New TripleDESCryptoServiceProvider() des.Key = md5.ComputeHash(Encoding.Unicode.GetBytes(key)) des.IV = New Byte(des.BlockSize \ 8 - 1) {} Return des End Function Private Function Decryption(ByVal cyphertext As String, ByVal key As String) As String Dim b As Byte() = Convert.FromBase64String(cyphertext) Dim des As TripleDES = createdes(key) Dim ct As ICryptoTransform = des.CreateDecryptor() Dim output As Byte() = ct.TransformFinalBlock(b, 0, b.Length)->

& solutions from https://bytes.com/topic/asp-net/answers/316682-bad-data-error a community of 418,436 IT Pros & Developers. It's http://community.instantasp.co.uk/1756/Bad-Data-Error-SystemSecurityCryptographyCryptographic quick & easy. Bad Data Error P: n/a ERamirez I downloaded the Portal Starter Kit of http://asp.net and started adding a few modules. All debuggin localy worked fine but once I put it onto a Windos bad data Server 2003 I keep getting the following error. Bad Data. 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.Security.Cryptography.CryptographicExceptio n: bad data error Bad Data. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [CryptographicException: Bad Data. ] System.Security.Cryptography.CryptoAPITransform._D ecryptData(IntPtr hKey, Byte[] rgb, Int32 ib, Int32 cb, Boolean fDone) +0 System.Security.Cryptography.CryptoAPITransform.Tr ansformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +805 System.Security.Cryptography.CryptoStream.FlushFin alBlock() +40 System.Web.Configuration.MachineKey.EncryptOrDecry ptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length) +139 System.Web.Security.FormsAuthentication.Decrypt(St ring encryptedTicket) +114 ASPNET.StarterKit.Portal.Global.Application_Authen ticateRequest(Object sender, EventArgs e) +591 System.Web.SyncEventExecutionStep.System.Web.HttpA pplication+IExecutionStep.Execute() +60 System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously) +87 -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573 The code where I believe this orignates from is the Cookie encryption which looks like the following: Sub Application_AuthenticateRequest(ByVal sender As Object, ByVal e As EventArgs) If Request.IsAuthenticated = True

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