John the ripper mac os x keychain

Alternately, AppleJack has a hidden expert mode type "x" at the menu that will turn auto-login off; I don't know if it works the other way. It's just a shell script, so you should be able to look at the source and see what it's doing there. You need to do two things: Second, crack the encrypted passwords by brute force trial and error.

john-users - Re: john with Apple Keychains (/Users/Alex/Library/Keychains/utamisimup.tkin)

A tool that can help you with this is John the Ripper. The Mac version includes a tool for extracting the passwords, and then you can use John to brute force the recovered encrypted passwords. While I have never done this against Mac passwords, I have used it against Windows and Linux passwords many times.

For a short password, cracking should be easy.

Your Answer

I haven't used the Mac password extraction tool, though, so I do not know what kind of access you might need. If you can create a separate Admin account, it should suffice, I suspect.


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Good luck, and I am so sorry for your loss. Hi procrastination, thank you, I didn't know the route to the passwords on OS X. I assume I need an admin account to get the Netinfo db? I don't currently have access to one. I do have full access to the filesystem however, and could load the data onto a machine on which I do have root access if this would let me extract the password db. I don't know where the user's password is stored if autologin is enabled, though.


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Here's an easy way to enable root user using single user mode. Once you've done so, log in normally as root and go to System Preferences and go to Accounts.

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I don't have my laptop on me so the verbiage may be off, but there'll be a password section with a possible password hint entered by the user. See if there's one. Root access or firewire for the matter allows easy access to backing up his home directory just in case.

John the Ripper step-by-step tutorials for end-users

In the same area, there will be a section for login options. Check here to see if autologin is on. I've never tried, but you can always try turning on autologin for that user without knowing their password since you're logged in as root and see what happens. And to answer one of your questions directed at procrastination, logging in as root will get you the privileges an admin user would have.

I was just looking around, and it seems that the NetInfo database went away while I wasn't looking. If you can mount the drive somehow so you can read that, you can get the encrypted hashes out of that directory. Or you can take a look at this blog post: You definitely need admin access to the file system to get the hashes out. It is more work that the John package. I just tested what is in there, and the command: Replace username with the account name.

I was able to run that without admin privileges, so you might can do that from the Guest account before you shutdown to mount the volume. Then get access to the file with the name extracted above, and run this command with result being the long string produced above: It might be a day or so before I get it up and running.

You can MeMail me if that will help. If I were in your place, I'd simply reboot to see if the account will auto login, and if it doesn't, then I'd recover the passwd file actually a dump of the local ds store and crack it. In my experience, that's your best bet, and it's pretty easy when you have full control of the machine like you do. I say to crack the password rather than to replace it because most folks leave their keychains set to auto unlock at login, and further, the login pass is generally the same as the keychain pass. If you instead replace or remove the user's login password, you'll destroy the hash for that original password, and I'm not aware of a good way to brute force a keychain password, so if you nuke the hash for the password, you will as far as I know be destroying any chance of getting the keychain data back.

To get access to the hash, you could simply enable the root account by booting into the installer and using the password reset utility on it.

John the Ripper

You're then clear to log in to the OS as root, and fire up Terminal to do the cracking. If the owner really preferred simple password, it will likely only take seconds for the actual crack. There are pretty good instructions here , which will walk you through all but getting the root account up and running. On preview: I was beaten to it. More speed metrics have been added to the status line.

Trivial parallel and distributed processing has been implemented with new --fork and --node options. Bitmaps have been implemented for faster comparison of computed vs. Cracking of bcrypt on bit x86 with GCC 4. The formats interface has been made more GPU-friendly. Many formats have been renamed. The license has been relaxed. This is mostly a bugfix release. Besides the many bugfixes mostly for issues introduced with -jumbo-6 , it adds support for cracking of KeePass 2.

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It also adds GPU support under recent Mac OS X releases, provides speedups for many of the previously-supported formats, and includes minor new features and documentation updates. OpenCL BitLocker tutorial. A generic tutorial rehashing much of the official documentation mostly basic. This one has numerous factual errors, yet it is representative of what many JtR tutorials look like, and all of them contain factual errors, unfortunately please feel free to submit a better one or to write one right on this wiki.

Downloading and building JtR with the jumbo patch on Linux intermediate. Running the official build of JtR 1. John the Ripper on a Ubuntu Dumping the user's password hash on Mac OS X