Fwd: Problem "cracking" a key_sig

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Hi all,

I'm using Ubuntu 14.04 and I use ecryptfs to encrypt arbitrary
directories; to mount the directories I use a command like this:

sudo mount -t ecryptfs .secret/ secret/ -o

The thing is that, somehow, I messed it up when pasting the password
on the first mount in one of the directories (yeah, I know that the
message saying that I've never mounted with that key before should
have been quite clarifying)...copied all the data and unmounted it.

Now, when I mount it and try to read files I get errors and messages
like this in dmesg:

[ 4210.614158] ecryptfs_parse_options: eCryptfs: unrecognized option
[ 4215.347261] Could not find key with description: [306437480dxxxxxx]
[ 4215.347269] process_request_key_err: No key
[ 4215.347272] ecryptfs_parse_packet_set: Could not find a usable
authentication token
[ 4215.347277] Valid eCryptfs headers not found in file header region
or xattr region, inode 919485

After downloading the code of the Ubuntu package I found out that in
the directory tests/userspace there were the tests for verifying
passphase signs, so I thought that I could use that to iterate through
mutations of the pasted passphrase in the hope of reproducing the mess
I provoked.

The problem I'm having is that the test program expects four parameters:

But since in my configuration I don't have a "file encryption key,
encryption key" I don't know how I could modify it in order to try to
find my passphrase; or should I use any other executable from

Thanks a lot!
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