tree e78030e34db458c9573d0f0bc33b9f44be2688f2
parent af4583b214bfe98df82d6645387d6c78fd698d7f
author Michael Brown <mcb30@ipxe.org> 1707340820 +0000
committer Michael Brown <mcb30@ipxe.org> 1707347628 +0000

[crypto] Add implementation of the DES cipher

The DES block cipher dates back to the 1970s.  It is no longer
relevant for use in TLS cipher suites, but it is still used by the
MS-CHAPv2 authentication protocol which remains unfortunately common
for 802.1x port authentication.

Add an implementation of the DES block cipher, complete with the
extremely comprehensive test vectors published by NBS (the precursor
to NIST) in the form of an utterly adorable typewritten and hand-drawn
paper document.

Signed-off-by: Michael Brown <mcb30@ipxe.org>