You're right that saying AES is confusing (I asked stopping doing so on the bug report) but for the wrong reasons ;-)
AES is a subset of Rijndael (fixed block size). FWIW even RijndaelManaged is a subset of the "real" Rijndael algorithm - but that's all beside the point. The real issue is with CFB and the facts that: * RijndaelManaged CFB is not compatible with AesCryptoServiceProvider CFB [1] (or with any other CFB implementation in the .NET BCL); * AesManaged does not support CFB at all [2] (likely not to add further confusion about it); So switching to Aes[CryptoServiceProvider|Managed] is not an option for Drew since he must interoperate with server-side code using the RijndaelManaged/CFB implementation. Sebastien [1] http://blogs.msdn.com/b/shawnfa/archive/2006/10/09/the-differences-between-rijndael-and-aes.aspx [2] http://blogs.msdn.com/b/shawnfa/archive/2007/01/17/new-crypto-algorithms-in-orcas.aspx On Sun, Jan 6, 2013 at 11:27 AM, edward.harvey.mono <[email protected]> wrote: >> From: [email protected] [mailto:mono-list- >> [email protected]] On Behalf Of Drew DeVault >> >> The >> problem comes >> from using a CryptoStream with a RijndaelManaged cipher. > > This might be unrelated, but your subject says AES, and your message body > says RijndaelManaged. AES is based on Rijndael, but AES is not Rijndael. > > Most likely you should use AesCryptoServiceProvider or AesManaged instead. > The main difference is that AesCryptoServiceProvider takes more time to > startup, but it's faster once it's started. So you use AesManaged for small > blocks of data (a few AES blocks worth) and use AesCryptoServiceProvider for > everything else. Also, supposedly AesCryptoServiceProvider isn't necessarily > cross-platform compatible, but I have yet to find the platform that doesn't > support it. > > The Rijndael classes are mostly provided for historic, legacy, and academic > purposes nowadays. > > _______________________________________________ > 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
