I am looking for an C# implementation om AES-256 in CTR-mode [closed]

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I've been searching the internet for an implementation of AES-256 in CTR-mode, in C#. In the RijndaelManaged-class where you find in .Net-framework, you find some supported modes but not CTR. I read something about using ECB-mode, and XOR the plain-text.

Does anyone have information how to implement the AES-256 in CTR-mode? Or an link or anything tha would help me to the right path.

Thanks you.

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I think that Bouncy Castle supports CTR

http://www.bouncycastle.org/

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You can check the NCiphers.Crypto library. It supports CTR:

NCiphers.Ciphers.AES aes = new NCiphers.Ciphers.AES();
aes.Mode = NCiphers.Ciphers.CipherBlockMode.CTR;
aes.Encrypt...

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Here's one in JavaScript: http://www.movable-type.co.uk/scripts/aes.html

You could integrate it into your .NET app using JavaScript.NET

Might be a bit slow, but it should be really easy to get it running.

Or, you could use it as a model for building your own implementation.