Couple errors in Electrum - possibly encryption related

[eaglejam]

I've been having a couple problems with Electrum lately.

The first I posted in the newbie's section, with no help.

First off, I'm on Mac OS X 10.8.3.

So I've been using Electrum 1.7 for a while now (The Executable signed by Animazing is the only one that works), and it has always served me well.
I decided to upgrade to 1.7.2 today. I had problems upgrading in the past, so...
I deleted everything (I backed up my seeds and Label API Key of course), installed Electrum 1.7.2, restored my seeds, and re-inputed my Label API key.
It then said to restart Electrum, I did so, and the GUI errored out, not even to the console like it always points to to find the issue.

I had to open it (Electrum) up in the TERMINAL to this:

Code:

Last login: Thu Apr  4 17:13:57 on ttys000
Eaglejams-MacBook-Pro:~ EJ$ /Applications/Electrum.app/Contents/MacOS/Electrum 
Traceback (most recent call last):
  File "/Applications/Electrum.app/Contents/Resources/__boot__.py", line 316, in <module>
    _run()
  File "/Applications/Electrum.app/Contents/Resources/__boot__.py", line 311, in _run
    exec(compile(source, path, 'exec'), globals(), globals())
  File "/Applications/Electrum.app/Contents/Resources/electrum.py", line 185, in <module>
    gui.main(url)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 2338, in main
    w = ElectrumWindow(self.wallet, self.config)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 344, in __init__
    self.run_hook('init_gui')
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 378, in run_hook
    apply(f, args)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 65, in init_gui
    self.full_pull()
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 158, in full_pull
    if self.do_full_pull(force) and force:
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 205, in do_full_pull
    decoded_key = self.decode(label["external_id"]) 
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 33, in decode
    decoded_message = aes.decryptData(self.encode_password, base64.b64decode(unicode(message)) )
  File "aes/__init__.pyc", line 632, in decryptData
  File "aes/__init__.pyc", line 29, in strip_PKCS7_padding
ValueError: String ending with '\x7f' can't be PCKS7-padded
2013-04-04 17:27:31.815 Electrum[23076:707] Electrum Error

Can any Electrum programmers give me an idea on where to go from here to get this resolved? Thanks.

and then I upgraded to 1.7.3, hoping it might be fixed. It wasn't, same run method (through the terminal):

Code:

Traceback (most recent call last):
  File "/Applications/Electrum.app/Contents/Resources/__boot__.py", line 316, in <module>
    _run()
  File "/Applications/Electrum.app/Contents/Resources/__boot__.py", line 311, in _run
    exec(compile(source, path, 'exec'), globals(), globals())
  File "/Applications/Electrum.app/Contents/Resources/electrum.py", line 192, in <module>
    gui.main(url)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 2408, in main
    w = ElectrumWindow(self.wallet, self.config)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 324, in __init__
    self.run_hook('init_gui')
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/gui/gui_classic.py", line 358, in run_hook
    apply(f, args)
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 66, in init_gui
    self.full_pull()
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 162, in full_pull
    if self.do_full_pull(force) and force:
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 214, in do_full_pull
    decoded_key = self.decode(label["external_id"]) 
  File "/Applications/Electrum.app/Contents/Resources/lib/python2.7/plugins/labels.py", line 34, in decode
    decoded_message = aes.decryptData(self.encode_password, base64.b64decode(unicode(message)) )
  File "aes/__init__.pyc", line 632, in decryptData
  File "aes/__init__.pyc", line 29, in strip_PKCS7_padding
ValueError: String ending with '\x7f' can't be PCKS7-padded
2013-04-14 12:12:12.902 Electrum[88597:707] Electrum Error

Is there any way of fixing these issues? I can't use Electrum as intended.
Hope this info helps.

[1715670625]

1715670625

[1715670625]

1715670625

[1715670625]

1715670625

[flatfly]

Just a guess... Any non-standard characters in your password?
Try to restore again, using another password for testing.

[eaglejam]

No non-standard characters in my password. Just alphanumeric.
Tried a new password and it still crashed.

I did more testing, and I think I've found the problem: the bug lies in the "Label Sync" plugin.

I did this in steps:

I restored from seed and I shut down Electrum, without it crashing on startup.
I added an API key for the Label Sync plugin, but I didn't check the "turn on" checkmark, I shut it down without Electrum crashing on startup.
I checked the checkmark for turning on Label Sync and shut down the client, and then Electrum will crash on startup repeatedly.

I hope that helps making this bug dead.

[Tachikoma]

Could you try a full upload via the plugin settings and trying it again?

[eaglejam]

I had another theory, 1.7.0 doesn't contain the encryption key stuff for Label Sync, but 1.7.2 and 1.7.3 do. Maybe the Label Sync service was expecting a encryption key that 1.7.0 didn't have in its electrum.dat file

So I backed up my labels via a Screenshot tool, restored from seed, added labels and API key in, forced upload Labels in Label Sync, and shut down Electrum.

When I restarted Electrum, it all worked!

[Tachikoma]

Glad you solved that issue