Ecryptfs wrapping passphrase

Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. If I give ecryptfs-unwrap-passphrase my login password, it outputs an hashed string. Is that my passphrase still unknow Or it is an hash of the login password? What really interest me, it's to be able to backup the passphrase. Sorry for the naive question It just looks like an MD5 hash because it's a bit value. The passphrase you're queried for is the user's your?

This enables you to change your login password with which the encryption passphrase is wrapped without changing the encryption passphrase itself which would result in the need to re-encrypt all encrypted files. Think of it like an SSH private key that you protected with a passphrase - only that, knowing the "raw" encryption passphrase, you can recover your encrypted files without knowing the wrapping passphrase.

So you may store this bit value somewhere safe i. If you want to see your mount passphrase, use the following command:. Did you ever resolve this? I'm suspecting that you accidentally checked the "Encrypt home directory" box when you installed Ubuntu.

I've sometimes neglected to make a copy of the unwrapped hex passphrase myself. I don't know if there's a way to unlock the encrypted files on a new system if you don't have the hex passphrase. Thanks for the reminder. It may have been too late for you. It looks like since timeshift normally runs as root that it doesn't access the decrypted versions of the directories and saves the encrypted versions of them. This is actually a good thing when you back up to an unencrypted external hard drive but it makes it more important to save the unwrapped hex passphrase.

Maybe the Ubuntu developers should require that a USB stick be inserted at installation time to save it on? Ubuntu Community Ask!Privacy Terms. Skip to content. Quick links. Forum rules There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it.

Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section.

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Before you post please read how to get help. I was hoping to check my key against a couple entries in my notes Is there any way to have the system report the current key? If I were to run ecryptfs-unwrap-passphrase again, and it asks me for my passphrase - and I use "somegenericpassphrase" as the passphrase, will it generate a new encryption key for the system and then supply it to me?

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Or - would I need to specifically remember the passphrase I used all those years ago when I first setup encryption? Any help you might offer would be appreciated! Last edited by Fuzzy on Thu Aug 28, pm, edited 1 time in total. Code: Select all echo "PassphraseNumber1" md5sum Gives 54f8da0aeef1adc66 echo "PassphraseNumber2" md5sum Gives 50bcb4a4ce3cf While you're waiting, read the free novel we sent you.

It's a Spanish story about a guy named "manual". I fully admit my ignorance in using encryption that's what I'm trying to remedy. So please bear with me for a lot more stupid questions! Basically, I have a number of guesses as to what the passphrase is. At this point, I am not sure how to test my passphrases to see which one is correct. Essentially, years ago when I set this all upI tested a "system failure" - where I removed the drive and using the key mounted the drive from a different system, pulling the data from the encrypted drive; satisfied that I understood the process enough to be protected both via encryption, and data recovery needs.

This is what made me believe that I needed to keep the key instead of the passphrase. Evidently this was a wrong conclusion? Here's the full scenario: 1. I have a fully operational system with "home" folder encryption enabled 2. I can logon to the encrypted user's account, and fully use the system as that user 3. I'm wanting to make sure that I still have the means to retrieve my data in the event of system failure 4.

I am uncertain of the passphrase I used to create the key, but I have a handful of ideas of what the passphrase was 5. I might have the key in my notes, but I'm uncertain Any recommendations on how to proceed? Thanks, Fuzzy. Then it's 'apropos' and 'man' time Code: Select all apropos ecrypt. Code: Select all apropos keyring.Join Stack Overflow to learn, share knowledge, and build your career.

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ecryptfs wrapping passphrase

When I used ecryptfs-setup-private on ubuntu I am assuming that the mount passphrase is going to be used as the actual passphrase for mounting the Private directory. But when I executed ecryptfs-mount-privatemy mount passphrase returned an error while the user's system login passphrase succeeded. Anyone knows why? PS: ecryptfs-mount-private used mount passphrase on another machine which has ubuntu Thus, any time you try to mount the eCryptfs using ecrypt-utilsit asks for your login passphrase to decrypt the wrapped-passphrase file to get the actual mount passphrase, then uses it to mount the filesystem, and that is for a good reason.

It uses your default login passphrase so as for you not to have to remember two different passphrases, and, more importantly, to auto-mount it whenever you login, as it uses the passphrase you use to login to unlock your Private data, too.

If you leave the mount passphrase blank, it will be replaced with a pretty long random mount passphrase that is hard to guess, thus making your. Private directory more secure, as hackers that have access to it, but not your wrapped-passphrasethey would have to guess the very long mount random passphrase that you do not even have to memorize.

The drawback of this technique is that losing the wrapped-passphrase file and you do not know the real mount passphrase, even you will be unable to access the decrypted data anymore. On other machines that does not have a wrapped-passphrase file, it uses the password you supply as the mount password directly, thus it works there. Passing --nopwcheck to ecryptfs-setup-private while setting up private directory will not enforce entering the real login passphrase as the wrapping passphrase, thus issuing:.

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For the mount passphrase, you may enter the same password again, or leave it blank to generate you one, but if you are afraid of losing the wrapped-passphrase if it is auto-generated, you can issue:. Choose options compatible with ecryptfs-utils unless you know what you are doing, and they are as follows:.

Continue mounting and add signature to sig-cache. Even if the two directories were empty, this command only can effectively work for setting up new one in those custom directories, but it is advised when using it to setup a new encrypted directory not to use it with standard Private and. Private directories so as not to cause incompatibilities with standard ecryptfs-utils auto-mounting.

See also: eCryptfs - ArchWiki. How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. Asked 5 years, 9 months ago.

Active 5 years, 5 months ago. Viewed 6k times. Improve this question. Add a comment. Active Oldest Votes. Private directory. Uses AES with byte key cipher in encrypting data. Option 2: Using low-level mounting Low-level mounting uses the mount passphrase directly. Choose options compatible with ecryptfs-utils unless you know what you are doing, and they are as follows: keytype : passphrasepassphrase : enter real mount passphrase not wrapping onecipher : AESkey bytes : 16plaintext paththrough : nofilename encryption : yesfnek signature : leave blank default.It only takes a minute to sign up.

I was exploring the possibility of changing the login password of ecryptfs. In this system Ubuntu My ecryptfs-utils is version ubuntu1. I took some courage from this post on Ask Ubuntu where 'rewrapping' is suggested. Whatever the 'wrapping passphrase' may mean, I thought to be playing safe by typing in the login password for all three questions.

The thinking was 'Is that wrong? It'll protest. Is that right? It won't change anything'. For example, launching ecryptfs-unwrap-passphrase gives stat: No such file or directory. Private are now dangling symlinks. I also fear problems upon rebooting because the GUI may be looking for an encrypted directory, a problem that I am raising elsewhere on AskUbuntuthough that is not because of my doing.

ecryptfs wrapping passphrase

Addition: after rebooting and a couple of dialogue windows about system issues to report, I could gain access to the GUI again. If this happens to you, please include the end of the system log as the error tells you to check. So you should have typed your old one first, and then your new one. When ecryptfs says 'passphrase', they mean 'password', and it is often your login password. It must be no longer than 64 characters. Sign up to join this community.

The best answers are voted up and rise to the top. Rewrapping the passphrase makes encryption disappear Ask Question. Asked 4 years, 2 months ago. Active 1 month ago. Viewed 2k times. I then got the error Error: Unwrapping passphrase failed [-2] Info: Check the system log for more information from libecryptfs and the encryption has disappeared!

What are the possibilities to restore encryption with ecryptfs in this situation? Improve this question. XavierStuvw XavierStuvw 5 5 gold badges 14 14 silver badges 34 34 bronze badges. Don't use ecryptfs. Use proper disk encryption like LUKS. Add a comment. Active Oldest Votes. Improve this answer. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.Hedging: Placing bets on the team with the high odds, and the low odds, to minimize loss.

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ecryptfs wrapping passphrase

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