[Metalab Issues] #432: Metalab Main Door Lock b0rken

[Metalab Issues]

#432: Metalab Main Door Lock b0rken
-------------------+--------------------------
Reporter:  leyrer  |     Owner:
  Status:  new     |  Keywords:  maindoor lock
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 Marius disassembled the brocken lock:
  I disassembled the lock, found a broken spring which had jammed the
 mechanism:
  http://soup.kintel.net/post/690206106/Disassembled-broken-lock-metalab-
 found-broken-spring

  I fished out the spring pieces and put it all back together.
  Unfortunately, the spring has a function, so while we currently can
 shutdown, we cannot reopen without an actual key.

  Symptom:
  * The lock latches closed fully on a single revolution instead of two
 revolutions
  * The lock unlatches in two revolutions.
  * The EVVA lock is a bit too smart - it counts the number of revolutions
 it takes to close and uses the same number of revolutions to open.
  * -> after unlocking, the lock is stuck in “half open” mode.

  Solution is probably to replace the box.
  Note: The EVVA cylinder itself works fine.

  Alternative solutions for fearless hackers:
  1) Find a replacement spring. To install it, the whole lock box has to be
 disassembled, which is a bit scary
  2) Reverse engineer the lock firmware to override the revolution count
 mechanism
  3) Find a social exploit at EVVA to obtain the firmware source code and
 modify it

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Ticket URL: <https://metalab.at/issues/ticket/432>
Metalab Issues <https://metalab.at/issues>
Metalab is a Hackerspace in Vienna's first district.