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Re: [PATCH v2 8/8] tests: mark tests broken under GIT_TEST_PROTOCOL_VERSION=2

From
Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date
Dec 18, 2018, 09:28 UTC
Message-ID
<8736qv18w4.fsf@evledraar.gmail.com>
In-Reply-To
<20181218000227.GB13835@google.com>
On Tue, Dec 18 2018, Jonathan Nieder wrote:
Show 20 quoted lines
> Ævar Arnfjörð Bjarmason wrote:
>> On Mon, Dec 17 2018, Jonathan Nieder wrote:
>
>>> This would make per-branch ACLs (as implemented both by Gerrit and
>>> gitolite) an essentially useless feature, so please no.
>>
>> Doesn't Gerrit always use JGit?
>>
>> The discussion upthread is about what we should do about git.git's
>> version of this feature since we document it doesn't do its job from a
>> security / ACL standpoint, but that doesn't preclude other server
>> implementations from having a working version of this.
>>
>> But if gitolite is relying on this to hide refs, and if our security
>> docs are to be believed, then it's just providing security through
>> obscurity.
>
> Yes, Gerrit uses JGit.  JGit shares configuration with Git, so if we
> make that configuration in Git warn "This is just a placebo", then
> people will naturally assume that it's just a placebo in JGit, too.

Aside from the merits of this change it sounds like a good idea to document the server options JGit shares with us somewhere, or have a test mode similar to what I added in (but didn't follow-up on integrating) in https://public-inbox.org/git/20170516203712.15921-1-avarab@gmail.com/

Show 18 quoted lines
> More importantly, if Git upstream stops caring about this use case,
> then the protocol and other features can evolve in directions that
> make it even harder to support.  I am willing to take on some of the
> burden of keeping it working, even when I do not run any servers that
> use plain Git (I do interact with many).
>
>> Like you I'm curious about a POC. The patch I submitted in
>> <20181217221625.1523-1-avarab@gmail.com> takes the "SECURITY" docs at
>> face value.
>
> One of the difficulties that security engineers have to deal with is
> living without absolutes.  In other words, their experience is
> constant risk/benefit tradeoffs: if you want 0% risk, then don't use a
> computer. ;-)
>
> If someone has thoughts on what would lead people to be comfortable
> with removing the SECURITY notice, then I'm happy to listen.  As
> already mentioned, I am strongly against abandoning this use case.

For me this would be docs backed up by tests (which can start as a ML reply) showing a case where this actually works to hide data.

I.e. have a repo with "master" and a "root-password" branch, where the "root-password" branch has content that's irresistible to "git repack" for delta purposes, do we end up sending the "root-password" content over on a fetch even when that branch isn't advertised & forbidden?

Or, if that fails are there ways to make it work? E.g. using hidden/* in combination with delta islands?

Previous: Jonathan NiederNext: Jeff King
Message 60 of 73 in “protocol v2 and hidden refs”
  1. 0/3 protocol v2 and hidden refsJeff King, Dec 11, 2018
  2. 1/3 serve: pass "config context" through to individual commandsJeff King, Dec 11, 2018
  3. Junio C HamanoDec 14, 2018
  4. Jeff KingDec 14, 2018
  5. Junio C HamanoDec 15, 2018
  6. Jeff KingDec 16, 2018
  7. Junio C HamanoDec 16, 2018
  8. Jeff KingDec 18, 2018
  9. Jonathan NiederDec 14, 2018
  10. Jeff KingDec 14, 2018
  11. Jonathan NiederDec 14, 2018
  12. Jeff KingDec 14, 2018
  13. 2/3 parse_hide_refs_config: handle NULL sectionJeff King, Dec 11, 2018
  14. Junio C HamanoDec 14, 2018
  15. 3/3 upload-pack: support hidden refs with protocol v2Jeff King, Dec 11, 2018
  16. Ævar Arnfjörð BjarmasonDec 11, 2018
  17. Jeff KingDec 11, 2018
  18. 0/3 Add a GIT_TEST_PROTOCOL_VERSION=X test modeÆvar Arnfjörð Bjarmason, Dec 11, 2018
  19. Ævar Arnfjörð BjarmasonDec 11, 2018
  20. 1/3 tests: add a special setup where for protocol.versionÆvar Arnfjörð Bjarmason, Dec 11, 2018
  21. 0/3 Some fixes and improvementsJonathan Tan, Dec 12, 2018
  22. 1/3 squash this into your patchJonathan Tan, Dec 12, 2018
  23. 3/3 also squash this into your patchJonathan Tan, Dec 12, 2018
  24. 2/3 builtin/fetch-pack: support protocol version 2Jonathan Tan, Dec 12, 2018
  25. Junio C HamanoDec 13, 2018
  26. 0/8 protocol v2 fixesÆvar Arnfjörð Bjarmason, Dec 13, 2018
  27. 0/4 protocol v2 fixesÆvar Arnfjörð Bjarmason, Dec 17, 2018
  28. Jeff KingDec 18, 2018
  29. 1/4 serve: pass "config context" through to individual commandsÆvar Arnfjörð Bjarmason, Dec 17, 2018
  30. 3/4 upload-pack: support hidden refs with protocol v2Ævar Arnfjörð Bjarmason, Dec 17, 2018
  31. 2/4 parse_hide_refs_config: handle NULL sectionÆvar Arnfjörð Bjarmason, Dec 17, 2018
  32. 4/4 fetch-pack: support protocol version 2Ævar Arnfjörð Bjarmason, Dec 17, 2018
  33. Junio C HamanoJan 8, 2019
  34. Jonathan TanJan 8, 2019
  35. Jeff KingJan 8, 2019
  36. 1/8 serve: pass "config context" through to individual commandsÆvar Arnfjörð Bjarmason, Dec 13, 2018
  37. 2/8 parse_hide_refs_config: handle NULL sectionÆvar Arnfjörð Bjarmason, Dec 13, 2018
  38. 3/8 upload-pack: support hidden refs with protocol v2Ævar Arnfjörð Bjarmason, Dec 13, 2018
  39. 4/8 tests: add a check for unportable env --unsetÆvar Arnfjörð Bjarmason, Dec 13, 2018
  40. 5/8 tests: add a special setup where for protocol.versionÆvar Arnfjörð Bjarmason, Dec 13, 2018
  41. Jonathan TanDec 13, 2018
  42. 6/8 tests: mark & fix tests broken under GIT_TEST_PROTOCOL_VERSION=1Ævar Arnfjörð Bjarmason, Dec 13, 2018
  43. 7/8 builtin/fetch-pack: support protocol version 2Ævar Arnfjörð Bjarmason, Dec 13, 2018
  44. Jeff KingDec 14, 2018
  45. 8/8 tests: mark tests broken under GIT_TEST_PROTOCOL_VERSION=2Ævar Arnfjörð Bjarmason, Dec 13, 2018
  46. Ævar Arnfjörð BjarmasonDec 13, 2018
  47. Junio C HamanoDec 14, 2018
  48. Jeff KingDec 14, 2018
  49. Ævar Arnfjörð BjarmasonDec 14, 2018
  50. Ævar Arnfjörð BjarmasonDec 14, 2018
  51. Jeff KingDec 17, 2018
  52. Jeff KingDec 17, 2018
  53. upload-pack: turn on uploadpack.allowAnySHA1InWant=trueÆvar Arnfjörð Bjarmason, Dec 17, 2018
  54. David TurnerDec 17, 2018
  55. Ævar Arnfjörð BjarmasonDec 17, 2018
  56. David TurnerDec 17, 2018
  57. Jonathan NiederDec 17, 2018
  58. Ævar Arnfjörð BjarmasonDec 17, 2018
  59. Jonathan NiederDec 18, 2018
  60. Ævar Arnfjörð BjarmasonDec 18, 2018
  61. Jeff KingDec 18, 2018
  62. Jeff KingDec 18, 2018
  63. Ævar Arnfjörð BjarmasonDec 18, 2018
  64. Junio C HamanoDec 26, 2018
  65. Ævar Arnfjörð BjarmasonDec 27, 2018
  66. Jonathan NiederDec 27, 2018
  67. 2/3 tests: mark tests broken under GIT_TEST_PROTOCOL_VERSION=1Ævar Arnfjörð Bjarmason, Dec 11, 2018
  68. 3/3 tests: mark tests broken under GIT_TEST_PROTOCOL_VERSION=2Ævar Arnfjörð Bjarmason, Dec 11, 2018
  69. Jonathan TanDec 13, 2018
  70. Jeff KingDec 14, 2018
  71. Ævar Arnfjörð BjarmasonDec 15, 2018
  72. Jeff KingDec 16, 2018
  73. Ævar Arnfjörð BjarmasonDec 16, 2018

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