8 Commits

Author	SHA1	Message	Date
Stephen Heumann	2c34d17925	Typos	2017-07-02 22:54:18 -05:00
Stephen Heumann	0386f928ff	Add comments and copyright notices, and rename chunk to block.	2017-07-01 17:53:49 -05:00
Stephen Heumann	97fc1ce981	Small cleanups in SHA-1.	2017-06-30 13:23:29 -05:00
Stephen Heumann	d97e0c0153	Don't update index value in each unrolled loop iteration.	2017-06-30 00:52:25 -05:00
Stephen Heumann	2d8c85bd98	Unroll SHA-1 loop with variables substituted to avoid cycling values around. ... SHA-1 has five state variables (a,b,c,d,e), and each iteration of the core loop cycles their values around (e.g. a->b), in some cases with modifications. By unrolling the loop by a factor of five and appropriately substituting the values operated on in each iteration, we can avoid actually doing the copies implied by this cycling, which gives a fairly significant performance gain.	2017-06-30 00:33:16 -05:00
Stephen Heumann	aab47e38e7	Compute SHA-1 message schedule 20 elements at a time, reusing storage. ... The reduces the storage needed and boosts performance, since the whole schedule is contained in the direct page.	2017-06-29 22:22:06 -05:00
Stephen Heumann	7182fc5817	Use separate loops for the four parts of the SHA-1 computation.	2017-06-29 20:51:36 -05:00
Stephen Heumann	a519776847	Add implementation of the basic block-processing function for SHA-1.	2017-06-29 16:54:49 -05:00