Can anybody point me to C or Java code (or anything else) that does NTRU encryption?
Several people who were implementing the algorithm have posted on this site, so maybe they could help?
I also noticed that quite a number of NTRU implementations have been written at universities, so it would seem strange that sources, or at least sample code, are so hard to come by.
Try this: http://sourceforge.net/projects/ntru/
The NTRU crypto is now available under an approved open source GPL v2 license. You can find it here. https://github.com/NTRUOpenSourceProject/ntru-crypto
There is a post here: http://java.itags.org/java-programming/164200/
You may find the tutorials on the NTRU website helpful -- http://www.ntru.com/cryptolab is the place to start.
Note that we encourage people to develop and play with the algorithms themselves, but you may not distribute your implementation without a license from NTRU.
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William Whyte, CTO, NTRU Cryptosystems
Perhaps this is why you cannot locate the source code, as you need a license.
Java sources for NTRUEncrypt and NTRUSign can be found here:
A command line interface for encryption and decryption using the NTRU cryptographic algorithm.
https://code.google.com/p/ntrutil/
NTRU sources are also available from the FlexiProvider SVN repository:
svn co --username guest --password guest https://svn.cdc.informatik.tu-darmstadt.de/svn/repos/flexiprovider
来源：https://stackoverflow.com/questions/3026761/ntruencrypt-source-code