unofficial mirror of bug-guix@gnu.org 
 help / color / mirror / code / Atom feed
* bug#45675: Zip-based archives store timestamps
@ 2021-01-05 13:10 Miguel Ángel Arruga Vivas
  2021-01-05 15:17 ` Julien Lepiller
  0 siblings, 1 reply; 4+ messages in thread
From: Miguel Ángel Arruga Vivas @ 2021-01-05 13:10 UTC (permalink / raw)
  To: 45675

A procedure like reset-gzip-timestamp should be useful for
reproducibility purposes, adapted to zip based archives as Smalltalk's
STAR or Java's JAR binary formats, as some or all of their contents are
generated usually at build time.

On the latest Zip specification[1], which only seem to be encumbered
regarding encryption, there is one header ID which could be used for
timestamp purposes (0x0020) but third party header IDs are allowed,
which include a "commonly used" 0x5455 timestamp.

[1] https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.8.TXT




^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-01-06 23:12 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-05 13:10 bug#45675: Zip-based archives store timestamps Miguel Ángel Arruga Vivas
2021-01-05 15:17 ` Julien Lepiller
2021-01-06 22:34   ` Miguel Ángel Arruga Vivas
2021-01-06 23:10     ` Julien Lepiller

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).