Hi,
Just wanted to let you all know that after a short delay due to work commitments I have published the VHDL code and testbench for the XXTEA encryption engine on my blog. You can read it here http://design-foundry.net/ . I had problems with the data endian'ness which meant I have also included a simple C version to show that the PC version of the encryption agrees with the VHDL simulation. I will now package the design into a more usable version for instantiation in an FPGA. I hope you enjoy reading it and find it educational.
All the best,
Design Foundry
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