On Sat, Sep 12, 2015 at 12:57 AM, Warren Young <[email protected]> wrote:
> For instance, why even mention “SHA1 Hash” on the checkin details page in > fossil ui, from src/info.c? Why not something more generic, like “checkin > ID”? > The checkin ID is the hash of the manifest for the checkin. e.g. try: [stephan@host:~/cvs/fossil/cwal]$ f info ... checkout: c56006cd3df5400a38de9b0b7e9797f8e2f3a999 2015-08-14 15:17:09 UTC ... [stephan@host:~/cvs/fossil/cwal]$ f artifact c56006cd3df5400a38de9b0b7e9797f8e2f3a999 B f88c7a2382edcc51d004f133fa72fc462814b200 C minor\stest\scode\stweaks. D 2015-08-14T15:17:09.841 F s2/s2.c 46dc5ced9a243b20571781a6b4ac232e79ca1e27 F s2/s2.h 7ab0c333784a684f608938b676a6c1c6c09ec170 F s2/s2_ops.c 69d17c0d0b017e19d1b0c87a75153c55841a02db F s2/unit/070-000-enum.s2 19c28bc16ea5e5a30953307344740566ca373ac4 P 3aa469f15c41f9920c0b43ae47acc3da4fc821e7 R 1f0ece1803f7f3776ace86d686725d62 U stephan Z bfdac81f2888e26d15908ba724a50cf1 [stephan@host:~/cvs/fossil/cwal]$ f artifact c56006cd3df5400a38de9b0b7e9797f8e2f3a999 | sha1sum - c56006cd3df5400a38de9b0b7e9797f8e2f3a999 - note that the input hash and output hash have the same value. > While looking into this, I see evidence of past historical wrangling here: > blob.uuid, for example, even though sizeof(SHA1) != sizeof(UUID). I guess > Fossil once used MD5 for these ID values, too, and not just for integrity > checksumming? > md5 is used in a small number of places for (IIRC) speed purposes. IIRC it's only used in the calculation of the R-card (pure an integrity-checking measure). -- ----- stephan beal http://wanderinghorse.net/home/stephan/ http://gplus.to/sgbeal "Freedom is sloppy. But since tyranny's the only guaranteed byproduct of those who insist on a perfect world, freedom will have to do." -- Bigby Wolf
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