With FlushFinalBlock I still get garbage. I tried FlushFinalBlock and Flush.
Any other ideas? Paul Ballard [EMAIL PROTECTED] >From: Joseph E Shook <[EMAIL PROTECTED]> >Reply-To: "Moderated discussion of advanced .NET topics." ><[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: Re: [ADVANCED-DOTNET] Encryption and Decryption using MemoryStream >Date: Tue, 11 Jun 2002 09:09:43 -0700 > >Try adding a encStream.FlushFinalBlock() just before the close() method. > >-----Original Message----- >From: Moderated discussion of advanced .NET topics. >[mailto:[EMAIL PROTECTED]] On Behalf Of Paul Ballard >Sent: Tuesday, June 11, 2002 7:48 AM >To: [EMAIL PROTECTED] >Subject: [ADVANCED-DOTNET] Encryption and Decryption using MemoryStream > >I am trying to do a quick encryption/decryption on strings. All of the >examples I've seen involve encrypting whole files using FileStream. I >have >been attempting to simulate that functionality using MemoryStream. >However, >if I use an exact copy of the MemoryStream that I have encrypted as the >source stream for decryption, the result is garbage. > >Is there a difference in the implementation of MemoryStream compared to >FileStream that would cause this, or is there something that you can see >in >the following code snippet that I am doing wrong? (Always a possibility >:-)) > > Dim memStr As New System.IO.MemoryStream() > Private Function Encrypt(ByVal input As String) As String > Dim bin As Byte() = New UnicodeEncoding().GetBytes(input) > Dim des As New DESCryptoServiceProvider() > Dim encStream As New CryptoStream(memStr, >des.CreateEncryptor(Key, >IV), CryptoStreamMode.Write) > encStream.Write(bin, 0, bin.Length) > encStream.Close() > Return BitConverter.ToString(memStr.ToArray()) > End Function > > Private Function Decrypt(ByVal input As String) > 'Make a new copy of the encrypted memory stream > Dim memStr2 As New System.IO.MemoryStream(memStr.ToArray()) > Dim des2 As New DESCryptoServiceProvider() > Dim encStream2 As New CryptoStream(memStr2, >des2.CreateDecryptor(Key, IV), CryptoStreamMode.Read) > Dim strRdr As New StreamReader(encStream2, True) > Dim retStr As String = strRdr.ReadToEnd() > encStream2.Close() > Return retStr > End Function > >Thanks for the help, >Paul Ballard >[EMAIL PROTECTED] > > >_________________________________________________________________ >MSN Photos is the easiest way to share and print your photos: >http://photos.msn.com/support/worldwide.aspx > >You can read messages from the Advanced DOTNET archive, unsubscribe from >Advanced DOTNET, or >subscribe to other DevelopMentor lists at http://discuss.develop.com. > >You can read messages from the Advanced DOTNET archive, unsubscribe from >Advanced DOTNET, or >subscribe to other DevelopMentor lists at http://discuss.develop.com. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
