Groups | Search | Server Info | Keyboard shortcuts | Login | Register

Groups > linux.debian.devel > #119570

Re: purpose of InRelease in apt [was: non-GPG signatures; was: Rust requirements]

From Simon Josefsson <simon@josefsson.org>
Newsgroups linux.debian.devel
Subject Re: purpose of InRelease in apt [was: non-GPG signatures; was: Rust requirements]
Date 2025-11-13 18:20 +0100
Message-ID <LQJ9f-cHSX-1@gated-at.bofh.it> (permalink)
References (6 earlier) <LPlC2-bKHO-13@gated-at.bofh.it> <LPqs1-bO9i-1@gated-at.bofh.it> <LPxMR-bT3e-1@gated-at.bofh.it> <LPCCR-bWGa-11@gated-at.bofh.it> <LQEsW-cEJx-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

Stefano Rivera <stefanor@debian.org> writes:

> Hi Simon (2025.11.10_16:02:18_+0000)
>> My understanding is that this is not actually the purpose of
>> InRelease, although it's a desirable side-effect. Instead, the point
>> of InRelease is that if the top-level metadata (Release file) is
>> served in the same file as its signatures and during the same http
>> transaction, then it cannot possibly be inconsistent, even during a
>> mirror resync
>
> I could imagine a scheme where signatures are written to separate
> files by Release file hash:
>
> by-hash/$(sha512 Release).{gpg,sigstore,*}
>
> That would be two file downloads, but you can have the same guarantee
> that the signatures exist before you update the Release files.

Good point, although let me suggest to use a scheme that embeds the date
from within the Release file as well, to have better sort order.  That
is actually what I already implement in my Git-LFS mirror of Debian:

Top-level Release and Release.gpg files are symlinks to by-date-sha256:

https://gitlab.com/debdistutils/dists/debian/-/tree/main/dists/trixie?ref_type=heads

For example

https://gitlab.com/debdistutils/dists/debian/-/blob/main/dists/trixie/Release?ref_type=heads

and

https://gitlab.com/debdistutils/dists/debian/-/blob/main/dists/trixie/Release.gpg?ref_type=heads

contains the links

by-date-sha256/2025-09-06T09.42.55Z-7b0a29677613ece3d32f71e7396702f637eb9e26ca35e378406130786679e959/Release

and

by-date-sha256/2025-09-06T09.42.55Z-7b0a29677613ece3d32f71e7396702f637eb9e26ca35e378406130786679e959/Release.gpg

respectively, and the directory has a useful sort-order:

https://gitlab.com/debdistutils/dists/debian/-/tree/main/dists/trixie/by-date-sha256?ref_type=heads

I used a sub-directory but that isn't really needed, your approach is
more efficient.

Still, this introduce latency:

1) retrieve Release file
2) retrieve Release.sigstore or Release.gpg file

It would be nice to avoid that added latency.  That's what I like about
using the InRelease file for this.  There is also one less error case to
worry about: what to do if there is a Release file but transfer errors
of the by-*/123123... file?  The logic has to withstands attacker
causing failures on that file too.

/Simon

Back to linux.debian.devel | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Hard Rust requirements from May onward Julian Andres Klode <jak@debian.org> - 2025-10-31 21:50 +0100
  Re: Hard Rust requirements from May onward John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> - 2025-10-31 22:40 +0100
    Re: Hard Rust requirements from May onward Simon Richter <sjr@debian.org> - 2025-11-01 04:20 +0100
      Re: Hard Rust requirements from May onward Geert Stappers <stappers@stappers.nl> - 2025-11-01 08:40 +0100
        Re: Hard Rust requirements from May onward Bjørn Mork <bjorn@mork.no> - 2025-11-01 13:40 +0100
          Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-01 14:40 +0100
            Re: Hard Rust requirements from May onward Andrey Rakhmatullin <wrar@debian.org> - 2025-11-01 15:40 +0100
              Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-01 20:40 +0100
                Re: Hard Rust requirements from May onward Philipp Kern <pkern@debian.org> - 2025-11-01 21:10 +0100
                Re: Hard Rust requirements from May onward Holger Levsen <holger@layer-acht.org> - 2025-11-02 00:20 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-02 10:30 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-02 10:40 +0100
                Re: Hard Rust requirements from May onward Philipp Kern <pkern@debian.org> - 2025-11-09 21:40 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-09 23:00 +0100
                Re: Hard Rust requirements from May onward Philipp Kern <phil@philkern.de> - 2025-11-09 23:30 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-10 11:40 +0100
                Re: Hard Rust requirements from May onward Andrey Rakhmatullin <wrar@debian.org> - 2025-11-10 12:20 +0100
                Re: Hard Rust requirements from May onward Holger Levsen <holger@layer-acht.org> - 2025-11-10 13:40 +0100
                Re: Hard Rust requirements from May onward Simon Richter <sjr@debian.org> - 2025-11-10 04:10 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-10 12:00 +0100
                Re: Hard Rust requirements from May onward Simon Richter <sjr@debian.org> - 2025-11-10 15:00 +0100
                Re: Hard Rust requirements from May onward David Kalnischkies <david@kalnischkies.de> - 2025-11-10 17:50 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-10 20:20 +0100
                Re: Hard Rust requirements from May onward Simon Josefsson <simon@josefsson.org> - 2025-11-10 20:30 +0100
                Re: purpose of InRelease in apt [was: non-GPG signatures; was: Rust  requirements] Simon McVittie <smcv@debian.org> - 2025-11-10 17:10 +0100
                Re: purpose of InRelease in apt [was: non-GPG signatures; was: Rust  requirements] Stefano Rivera <stefanor@debian.org> - 2025-11-13 13:20 +0100
                Re: purpose of InRelease in apt [was: non-GPG signatures; was: Rust  requirements] Simon Josefsson <simon@josefsson.org> - 2025-11-13 18:20 +0100
          Re: Hard Rust requirements from May onward Russ Allbery <rra@debian.org> - 2025-11-01 17:50 +0100
          Re: Hard Rust requirements from May onward Christoph Biedl <debian.axhn@manchmal.in-ulm.de> - 2025-11-05 09:10 +0100
        Re: Re: Hard Rust requirements from May onward John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> - 2025-11-02 11:20 +0100
    Re: Hard Rust requirements from May onward Antoni Boucher <bouanto@zoho.com> - 2025-11-01 16:30 +0100
      Re: Hard Rust requirements from May onward John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> - 2025-11-02 11:50 +0100
        Re: Hard Rust requirements from May onward Antoni Boucher <bouanto@zoho.com> - 2025-11-02 16:30 +0100
  Re: Hard Rust requirements from May onward Julian Andres Klode <jak@debian.org> - 2025-10-31 22:50 +0100
  Re: Hard Rust requirements from May onward Paul Tagliamonte <paultag@debian.org> - 2025-11-01 15:20 +0100
    Re: Hard Rust requirements from May onward Paul Tagliamonte <paultag@debian.org> - 2025-11-01 15:20 +0100
    Re: Re: Hard Rust requirements from May onward John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> - 2025-11-02 11:30 +0100
    Re: Hard Rust requirements from May onward Bill Allombert <ballombe@debian.org> - 2025-11-02 15:40 +0100
  Re: Hard Rust requirements from May onward Joerg Jaspert <joerg@debian.org> - 2025-11-02 13:10 +0100
    Re: Hard Rust requirements from May onward Richard Lewis <richard.lewis.debian@googlemail.com> - 2025-11-02 16:20 +0100
      Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-02 18:10 +0100
    Re: Hard Rust requirements from May onward Julian Andres Klode <jak@debian.org> - 2025-11-02 17:30 +0100
      Re: Hard Rust requirements from May onward Joerg Jaspert <joerg@debian.org> - 2025-11-02 17:40 +0100
    Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-03 23:20 +0100
      Re: Hard Rust requirements from May onward Ansgar 🙀 <ansgar@debian.org> - 2025-11-04 07:30 +0100
        Re: Hard Rust requirements from May onward Mike Hommey <mh@glandium.org> - 2025-11-04 08:10 +0100
        Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 11:50 +0100
          Re: Hard Rust requirements from May onward Simon Richter <sjr@debian.org> - 2025-11-04 12:10 +0100
            Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 13:30 +0100
              Vendoring Simon Richter <sjr@debian.org> - 2025-11-04 13:50 +0100
          Re: Hard Rust requirements from May onward Holger Levsen <holger@layer-acht.org> - 2025-11-04 13:20 +0100
            Re: Hard Rust requirements from May onward Simon Richter <sjr@debian.org> - 2025-11-04 13:30 +0100
            Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 16:00 +0100
              Re: Hard Rust requirements from May onward Holger Levsen <holger@layer-acht.org> - 2025-11-04 16:50 +0100
                Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 19:40 +0100
        Re: Hard Rust requirements from May onward Stephan Verbücheln <verbuecheln@posteo.de> - 2025-11-04 15:30 +0100
          Re: Hard Rust requirements from May onward Fabian Grünbichler <debian@fabian.gruenbichler.email> - 2025-11-04 18:40 +0100
      Re: Hard Rust requirements from May onward Fabian Grünbichler <debian@fabian.gruenbichler.email> - 2025-11-04 18:30 +0100
        Re: Hard Rust requirements from May onward Sebastian Ramacher <sramacher@debian.org> - 2025-11-04 19:10 +0100
          Re: Hard Rust requirements from May onward Fabian Grünbichler <debian@fabian.gruenbichler.email> - 2025-11-04 19:40 +0100
        Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 20:10 +0100
          Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-04 21:50 +0100
          Re: Hard Rust requirements from May onward Fabian Grünbichler <debian@fabian.gruenbichler.email> - 2025-11-05 07:50 +0100
            Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-05 12:10 +0100
        Re: Hard Rust requirements from May onward Adrian Bunk <bunk@debian.org> - 2025-11-05 18:40 +0100
        Re: Hard Rust requirements from May onward Philipp Kern <pkern@debian.org> - 2025-11-06 22:10 +0100
    Re: Hard Rust requirements from May onward Sean Whitton <spwhitton@spwhitton.name> - 2025-11-05 16:00 +0100
  Re: Hard Rust requirements from May onward David Kalnischkies <david@kalnischkies.de> - 2025-11-03 13:40 +0100
    apt-ftparchive alternatives (was: Hard Rust requirements from May  onward) Jeremy Stanley <fungi@yuggoth.org> - 2025-11-03 19:00 +0100
      Re: apt-ftparchive alternatives (was: Hard Rust requirements from  May onward) nick black <dankamongmen@gmail.com> - 2025-11-03 19:50 +0100
        Re: apt-ftparchive alternatives (was: Hard Rust requirements from  May onward) Jeremy Stanley <fungi@yuggoth.org> - 2025-11-03 20:00 +0100
          Re: apt-ftparchive alternatives (was: Hard Rust requirements from  May onward) Peter Pentchev <roam@ringlet.net> - 2025-11-03 21:00 +0100
          Re: apt-ftparchive alternatives Richard Lewis <richard.lewis.debian@googlemail.com> - 2025-11-15 14:00 +0100
      Re: apt-ftparchive alternatives (was: Hard Rust requirements from  May onward) David Kalnischkies <david@kalnischkies.de> - 2025-11-05 16:10 +0100
        Re: apt-ftparchive alternatives Ahmad Khalifa <ahmad@khalifa.ws> - 2025-11-06 22:20 +0100
          Re: apt-ftparchive alternatives David Kalnischkies <david@kalnischkies.de> - 2025-11-09 17:00 +0100
            Re: apt-ftparchive alternatives Ahmad Khalifa <ahmad@khalifa.ws> - 2025-11-09 21:50 +0100
              Re: apt-ftparchive alternatives David Kalnischkies <david@kalnischkies.de> - 2025-11-10 14:00 +0100

csiph-web