Hello Drew, There was a bug filled yesterday, #9201 [1]. You might want to c.c. yourself to it.
FWIW it's not really AES related. MS implementation(s) of CFB are a bit weird. RijndaelManaged does it differently than others .NET ciphers (which is what Mono supports), including AesCryptoServiceProvider (even when the former uses a 128 bits block size). AesManaged does not even support CFB (even if it was, once upon a time, documented as a wrapper on top of RijndaelManaged). Sebastien [1] https://bugzilla.xamarin.com/show_bug.cgi?id=9201 On Thu, Jan 3, 2013 at 4:55 PM, Rodrigo Kumpera <[email protected]> wrote: > Please file a bug in bugzilla.xamarin.com with a test case. > > > > > On Tue, Jan 1, 2013 at 11:00 PM, Drew DeVault <[email protected]> wrote: >> >> I'm having an issue with Mono that does not appear on Microsoft.NET, >> related to AES/CFB encryption with no padding. Firstly, here's my Mono >> version: >> >> Mono JIT compiler version 2.10.8.1 (Debian 2.10.8.1-1ubuntu2.2) >> Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. >> www.mono-project.com >> TLS: __thread >> SIGSEGV: altstack >> Notifications: epoll >> Architecture: amd64 >> Disabled: none >> Misc: softdebug >> LLVM: supported, not enabled. >> GC: Included Boehm (with typed GC and Parallel Mark) >> >> Secondly, I would like to find a solution that does indeed work on this >> version of Mono, because most of my users are on the same version. The >> problem comes >> from using a CryptoStream with a RijndaelManaged cipher. I have attached a >> proof of concept to the email, along with the results of running it on >> Windows with >> Microsoft.NET and on Linux Mint 12 with Mono. >> >> The AesStream in the example comes from this project: >> https://github.com/SirCmpwn/Craft.Net/blob/master/Craft.Net/AesStream.cs >> >> In short, on Microsoft.NET, writing to the CryptoStream does indeed >> encrypt the data properly, where on Mono, no data is written, and an >> IndexOutOfBoundsException is thrown when trying to read the encrypted >> data. >> >> Drew DeVault >> >> _______________________________________________ >> Mono-list maillist - [email protected] >> http://lists.ximian.com/mailman/listinfo/mono-list >> > _______________________________________________ Mono-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-list
