624430 - Sync key mismatch (SHA256 HMAC error) on sender after setting up client with J-PAKE

Status: RESOLVED WONTFIX

(Firefox :: Sync, defect)

Description

[Richard Newman [:rnewman]]

Justin reported that:

* Machines A and B were happily syncing. 4.0b8/1.6.1.
* Machine C added via J-PAKE.
* Machine B (after restart, presumably) reports that its sync key cannot decrypt the server keybundle.

Master Password was enabled on Machine B.

Log:

http://justin.pastebin.mozilla.org/921526

... but doesn't do much good; it's the J-PAKE sender log, after a restart.

This is relevant:

2011-01-10 09:52:02     Service.Main         INFO    Testing info/collections: {"clients":1294678753.65,"crypto":1292863910.86,"forms":1294679286.58,"history":1294679286.96,"keys":1285522516.97,"meta":1292867312.41,"bookmarks":1294678754.19,"prefs":1293497123.28,"tabs":1294679287.12,"passwords":1294632949.94}

Comment 1

[Tony Chung [:tchung]]

qa will attempt to repro

Comment 2

[Richard Newman [:rnewman]]

Clarifying:

* Machine A: no MP.
* Machine B: MP.
* Machine C: no MP.

J-PAKE was between A and C, which are now working fine. Machine B stopped working.

Possible old version/upgrade/?

Comment 3

[Chris Karlof [:ckarlof]]

This bug only affects Sync 1.1, and it was shut down in the fall of 2015 (https://blog.mozilla.org/services/2015/07/31/shutting-down-the-legacy-sync-service/).