On Tue, Jan 3, 2012 at 7:42 AM, Fellinger Thomas - S1010239008 <[email protected]> wrote: > > I hope I am in the right place here ;) > > I am just working on a python project regarding ccmp.
You mean CCM mode? What's your project? Can you use CTR mode instead and some other form of integrity-checking? ;-) > I saw that crypto++ already includes the ccm, but in pycryptopp its not > avaiable. Is there a plan to add this? Nobody has requested it before now. > How much work would it be to add this feature on my own? Hm... probably the way to do it would be to copy this file and change the names from "AES" to "AESCCM": https://tahoe-lafs.org/trac/pycryptopp/browser/git/pycryptopp/cipher/aesmodule.cpp The core change is to change "CryptoPP::CTR_Mode<CryptoPP::AES>::Encryption" to however you spell "CCM" in Crypto++. I guess you'll also have to have a separate encryption and decryption object, instead of using the way aesmodule.cpp does it, which uses an instance of the "Encryption" class for both encryption and decryption. Having unit tests with test vectors and a startup self-test like this: https://tahoe-lafs.org/trac/pycryptopp/browser/git/pycryptopp/test/test_aes.py https://tahoe-lafs.org/trac/pycryptopp/browser/git/pycryptopp/cipher/aes.py would be necessary (but not sufficient) for me to include this addition in pycryptopp upstream. pycryptopp is on github now, so hopefully that makes you feel empowered to click the "fork me" button and get started. :-) Regards, Zooko _______________________________________________ tahoe-dev mailing list [email protected] http://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev
