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Using Rijndael in Counter (CTR) Mode

The .NET CipherMode enumeration does not include CTR mode. I want to
use Rijndael (AES) in CTR mode. Is there anything easily available in
C# to use or do I have to roll my own? I have found some code in
C++/.NET but not yet in C#.

Thanks,

rossum
Aug 6 '06 #1
1 4819
On Sun, 06 Aug 2006 21:40:26 +0100, rossum <ro******@coldm ail.com>
wrote:
>The .NET CipherMode enumeration does not include CTR mode. I want to
use Rijndael (AES) in CTR mode. Is there anything easily available in
C# to use or do I have to roll my own? I have found some code in
C++/.NET but not yet in C#.

Thanks,

rossum
I have not been able to find a direct solution. I ended up writing an
EncryptBlock() method which used ECB mode with no padding and building
my own CTR Mode function from that. I does seem strange that CTR mode
is not included in .NET as a standard option.

rossum
Aug 8 '06 #2

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