Shopify/dukpt — pull request #1 by jonnolen (2012-11-03 02:02:05+00:00)
Title: issue with derive_pek method

PEK fails for ANSI spec examples for at least KSN FFFF9876543210E00001 and FFFF9876543210E00003

I added the test for FFFF9876543210E00003 to demonstrate.