[Mono-list] AES/CFB Stream Cipher Problem

edward.harvey.mono edward.harvey.mono at clevertrove.com
Mon Jan 7 14:18:02 UTC 2013


> From: Sebastien Pouliot [mailto:sebastien.pouliot at gmail.com]
> 
> 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.

Solid points.  Drew, are you constrained to using CFB?  Perhaps CBC instead?



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