Q. Can you help me find primary sources about the Enigma machine used during World War II?

The British National Archives http://www.nationalarchives.gov.uk/ holds papers relating to the French and Polish contribution to the solution of ENIGMA, particularly as revealed by General Gustave BERTRAND in his book, ENIGMA, and S A MAYER of the Polish Intelligence Service. They have an online exhibit. The Alan Turing Digital Archive http://www.turingarchive.org/ contains digitized copies of Turing's ‘Treatise on the Enigma’. c. 1939-42.