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Operating Systems Linux Debian Problems with cryptsetup keyfile encrypted root partition under Debian 9, i386 Post 303024571 by tyuxar on Thursday 11th of October 2018 06:16:49 AM
Old 10-11-2018
The final goal is to put the key on USB, but right now i don't have any. This approach is solely exists for test and learning reasons. And since the USB key appears in the system as just another block device, like any partition, i'm trying to assemble the whole thing like this and then put the keyfile on USB.

I've searched through the net and i stucked. This is why i asked for help.

------ Post updated at 10:16 AM ------

I've checked out luksAddKey. It's not what i want to achieve. It's for adding an additional keyfile, but i don't want to add an additional keyfile, i want to use that one on /dev/sda4.
 

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KSTASH(8)						    BSD System Manager's Manual 						 KSTASH(8)

NAME
kstash -- store the KDC master password in a file SYNOPSIS
kstash [-e string | --enctype=string] [-k file | --key-file=file] [--convert-file] [--random-key] [--master-key-fd=fd] [--random-key] [-h | --help] [--version] DESCRIPTION
kstash reads the Kerberos master key and stores it in a file that will be used by the KDC. Supported options: -e string, --enctype=string the encryption type to use, defaults to DES3-CBC-SHA1. -k file, --key-file=file the name of the master key file. --convert-file don't ask for a new master key, just read an old master key file, and write it back in the new keyfile format. --random-key generate a random master key. --master-key-fd=fd filedescriptor to read passphrase from, if not specified the passphrase will be read from the terminal. FILES
/var/heimdal/m-key is the default keyfile if no other keyfile is specified. The format of a Heimdal master key is the same as a keytab, so ktutil list can be used to list the content of the file. SEE ALSO
kdc(8) HEIMDAL
April 10, 2007 HEIMDAL
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