Conflict between Calibre and mounted TrueCrypt device volume

[acidzebra]

Hi all,


This may be an unusual/edge case, I don't know. I have an external USB hard drive entirely encrypted (so not a separate truecrypt container on a partition, nor a encrypted partition, but a device-hosted truecrypt volume) using TrueCrypt's volume creation wizard and choosing the 'encrypt a non-system partition/drive' option. If this device is mounted via truecrypt, calibre fails to detect the reader properly when it is subsequently attached (reader shows up with 0KB mem, card is not detected, get the following error:

ERROR: Error: Error communicating with device
unsupported operand type(s) for +: 'NoneType' and 'str'
Traceback (most recent call last):
File "calibre\gui2\device.pyo", line 57, in run
File "calibre\gui2\device.pyo", line 199, in _books
File "calibre\devices\prs505\driver.pyo", line 103, in books
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'
)

This behavior only occurs when the encrypted drive is mounted, not when it is attached but not mounted, it also does not happen when a truecrypt container/file is mounted.

Behavior occurs on windows XP, any of the Calibre 0.6.x series, TrueCrypt 6.2a and earlier. I will test this under linux shortly.

Of course it is no big deal to unmount the drive before attaching the reader (if slightly annoying), but the behavior is a little odd so I thought I'd mention it.

[kovidgoyal]

Interesting. Can you post the output of

calibre-debug -d

with the reader and the truecrypt volume connected

[acidzebra]

With truecrypt volume mounted:

USB devices on system: [u'usb\\root_hub&vid8086&pid2832&rev0003', u'usb\\root_hu
b&vid8086&pid2830&rev0003', u'usb\\root_hub&vid8086&pid2831&rev0003', u'usb\\roo
t_hub&vid8086&pid2835&rev0003', u'usb\\root_hub&vid8086&pid2834&rev0003', u'usb\
\root_hub20&vid8086&pid2836&rev0003', u'usb\\root_hub20&vid8086&pid283a&rev0003'
, u'usb\\vid_03f0&pid_171d&rev_0100', u'usb\\vid_0424&pid_2504&rev_0001', u'usb\
\vid_04e8&pid_1f05&rev_0000', u'usb\\vid_054c&pid_031e&rev_0229', u'usb\\vid_08f
f&pid_2580&rev_0623', u'usb\\vid_413c&pid_1002&rev_0200', u'usb\\vid_413c&pid_20
02&rev_0200', u'usb\\vid_413c&pid_2002&rev_0200&mi_00', u'usb\\vid_413c&pid_2002
&rev_0200&mi_01', u'usb\\vid_413c&pid_3016&rev_0007']
Drives detected:
        (ID, Partitions, Drive letter)
        ('IDE\\DISKTOSHIBA_MK1214GAH_______________________BW001C__\\5&89C8242&0
&0.0.0', 'No mount points found')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC&REV_1000\\080046100067F7BF&0',
'No mount points found')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC:MS&REV_1000\\080046100067F7BF&1
', 'No mount points found')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC:SD&REV_1000\\080046100067F7BF&2
', 'No mount points found')
Looking for BEBOOK
Looking for BEBOOK_MINI
Looking for BLACKBERRY
Looking for CYBOOKG3
Looking for EB600
Looking for ILIAD
Looking for IREXDR1000
Looking for JETBOOK
Looking for KINDLE
Looking for KINDLE2
Looking for KINDLE_DX
Looking for PRS500
Looking for PRS505
Looking for PRS700
Looking for ANDROID
Looking for CYBOOK_OPUS
Looking for COOL_ER
Device possibly connected: <calibre.devices.prs505.driver.PRS505 object at 0x02B
0A510>
Trying to open device... OK
Main memory: None
Total space: (0, 0, 0)

Rerun after unmounting TC volume:

USB devices on system: [u'usb\\root_hub&vid8086&pid2832&rev0003', u'usb\\root_hu
b&vid8086&pid2830&rev0003', u'usb\\root_hub&vid8086&pid2831&rev0003', u'usb\\roo
t_hub&vid8086&pid2835&rev0003', u'usb\\root_hub&vid8086&pid2834&rev0003', u'usb\
\root_hub20&vid8086&pid2836&rev0003', u'usb\\root_hub20&vid8086&pid283a&rev0003'
, u'usb\\vid_03f0&pid_171d&rev_0100', u'usb\\vid_0424&pid_2504&rev_0001', u'usb\
\vid_04e8&pid_1f05&rev_0000', u'usb\\vid_054c&pid_031e&rev_0229', u'usb\\vid_08f
f&pid_2580&rev_0623', u'usb\\vid_413c&pid_1002&rev_0200', u'usb\\vid_413c&pid_20
02&rev_0200', u'usb\\vid_413c&pid_2002&rev_0200&mi_00', u'usb\\vid_413c&pid_2002
&rev_0200&mi_01', u'usb\\vid_413c&pid_3016&rev_0007']
Drives detected:
        (ID, Partitions, Drive letter)
        ('IDE\\DISKTOSHIBA_MK1214GAH_______________________BW001C__\\5&89C8242&0
&0.0.0', 'No mount points found')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC&REV_1000\\080046100067F7BF&0',
2, u'F:\\')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC:MS&REV_1000\\080046100067F7BF&1
', 3, u'G:\\')
        ('USBSTOR\\DISK&VEN_SONY&PROD_PRS-505/UC:SD&REV_1000\\080046100067F7BF&2
', 'No mount points found')
Looking for BEBOOK
Looking for BEBOOK_MINI
Looking for BLACKBERRY
Looking for CYBOOKG3
Looking for EB600
Looking for ILIAD
Looking for IREXDR1000
Looking for JETBOOK
Looking for KINDLE
Looking for KINDLE2
Looking for KINDLE_DX
Looking for PRS500
Looking for PRS505
Looking for PRS700
Looking for ANDROID
Looking for CYBOOK_OPUS
Looking for COOL_ER
Device possibly connected: <calibre.devices.prs505.driver.PRS505 object at 0x02B
0A510>
Trying to open device... OK
Main memory: u'F:\\'
Total space: (220368896, 4005060608L, 0)

In both cases the reader can be browsed using windows explorer and has the same drive letters, which makes the 'No mount points found' a little odd.

[kovidgoyal]

calibre uses WMI to query the OS for the mounted drive points. Presumably TrueCrypt is interfering with that process somehow.

[acidzebra]

Bugger. I'll go see if the truecrypt guys know why this might be. Thanks. If I hear anything I'll update this thread.