[SOLVED] LUKS USBs not recognized

[Anonymous]

I’m running AntiX 17.4 (4.9.160-antix.1-amd64-smp) on a Acer Swift notebook. I use a lot of LUKS encrypted USB thumbdrives, which with most distros, upon insertion, a window pops of asking for the passphrase and once entered, it’s decrypted and accessible. I have cryptsetup installed, and while unencrypted USB thumbdrives are recognized and mounted as expected, LUKS partitions are not recognized and therefore inaccessible. Can someone help me out with this? Thank you!

[Forum Admin dolphin_oracle]

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I think the tools antiX uses for automounting do not support encrypted partitions directly. You’ll need to use

luksOpen devicename name

to open the luks container on the device. Then you should be able to mount the filesystem within.

So if your usb is sdb and your encrypted partition is sdb1, you would

luksOpen /dev/sdb1 encrypted_usb

which should make the filesystem available at

/dev/mapper/encrypted_usb

spacefm will probably mount that automatically

• This reply was modified 4 years, 1 month ago by dolphin_oracle.

[Anonymous]

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Thanks. I tried doing what you suggested and was asked for the passphrase, but once entered, spacefm returns with udevil: denied 73: fstype 'crypto_LUKS' is not an allowed type. I checked /dev/mapper/encrypted_usb and it’s there but not accessible since it’s not supported. Is there a package I can install to add this LUKS capability?

[Anonymous]

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Thanks, dolphin_oracle, for your help.

I didn’t realize it was just a symlink in /dev/mapper/, which is why it wouldn’t open (duhhh). Got it working by doing as follows.

Open LUKS container partitions

sudo cryptsetup open /dev/LUKSpartition NAME --type luks
Example: sudo cryptsetup open /dev/sda1 EncUSB --type luks

Upon entering your passphrase/password, a symlink appears at /dev/mapper/NAME

Then I mounted it by first creating a directory:
sudo mkdir /mnt/directoryname
Example: sudo mkdir /mnt/USB1
Then mounting:
sudo mount /dev/mapper/NAME /mnt/directoryname
Example: sudo mount /dev/mapper/EncUSB /mnt/USB1

The encrypted partition will then be accessible.

Then for closing the container:

sudo umount /mnt/directoryname
Example: sudo umount /mnt/USB1
Then,
sudo cryptsetup close NAME
Example: sudo cryptsetup close EncUSB

Thanks for steering me in the right direction.

[Author]

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