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- John the Ripper is free and Open Source software, distributed primarily in source code form & a free password cracking software too.
- I've been following the instructions here for installing John the Ripper on my Macbook Pro (El Capitan). I've skipped the Iterm and Cuda sections (I have a Redeon GPU). All is well until I run. Make clean macosx-x86-64 Which gives me the error.
- John the ripper is an advanced password cracking tool used by many which are free and open source. John the Ripper initially developed for UNIX operating system but now it works on Fifteen different platforms.
Please note that 'binary' (pre-compiled) distributions of John may include alternate executables instead of just 'john'. You may need to choose the executable that fits your system best, e.g. 'john-omp' to take advantage of multiple CPUs and/or CPU cores. John the Ripper is designed to be both feature-rich and fast. John the Ripper is a free password cracking software tool. Originally developed for the Unix operating system, it can run on fifteen different platforms (eleven of which are architecture-specific versions of Unix, DOS, Win32, BeOS, and OpenVMS).
16 May 2013John the Ripper (John for short) is an open source, multi-platform, best-of-breed password cracking tool – primarily, because it’s fast, versatile and highly customisable. John not only supports a wide variety of hashes, but also is able to accept a variety of customised rules and parameters.
Unfortunately however, John doesn’t leverage the multicore CPU you have in your machine, since it is, by default, singlethreaded. As such, if you own a CPU that supports multithreading, John will probably end up run slower since it would only be working with an approximate maximum of half of the total CPU capacity of a single core.
Fortunately, John can be made to run on multiple cores with multiple threads with OpenMPI. Yes, I am aware that this subject has been covered before, however, since I haven’t found anything online about setting this up from start to finish on a Mac running OS X 10.8 (Mountain Lion) I’m going to cover just that.
Approach
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We’ll need to install Apple’s Xcode, download the latest versions of both OpenMPI and John, enable a few flags, and compile OpenMPI and John from source. After we compile John, we’ll also be taking a brief look at another configuration we can use to enable John to compete for CPU time an not only make use of idle CPU cycles. Let’s jump right in!
Step 1 – Downloading Xcode
We’ll start off by downloading Apple’s Xcode. We’ll need Xcode in order to be able to install the GCC compiler out of the box. I’m sure you can install GCC without installing Xcode (it’s probably not that difficult) but for simplicity’s sake, we’ll be going with Xcode.
In order to download Xcode, you’ll want to head over to the Mac App Store. On older versions of OS X, you can probably find a DMG file somewhere and install Xcode from there (you might run into some incompatibilities if you do this on older Macs).
Step 2 – Installing Command Line Tools
Once Xcode is downloaded and installed, go ahead and start it up. You should be greeted with a splash screen saying ‘Welcome to Xcode’. Navigate to Xcode > Preferences in the top menu, or the usual ⌘, for shortcut fans. In the Preferences window, navigate to the Downloads tab. There you should be able to download and install the Command Line Tools from within Xcode. Go ahead and click Install.
If you try to run the make command before we install Xcode and its Developer Command Line Tools you will get a make: command not found error. The make command invokes the compiler, and based on the Makefile (more on this later) the compiler will compile the source code into executable files.
Step 3 – Compiling and Installing OpenMPI from source
Now that we’ve got all the Command Line Tools installed, let’s compile and install OpenMPI. As far as I know you can’t download a binary version of OpenMPI the Mac. Compiling it from source is not too hard anyway. Download the OpenMPI source from here to get started. If you’re confused as to which file to download, go with the first one – it’s the latest version. Place the folder somewhere predictable. I placed it in my home directory and renamed it to openmpi make things simpler.
If you haven’t yet fired up your Terminal, now’s the time to do so. cd into the directory with all the source code.
Next, you’ll need to run ./configure --prefix=/usr/local . This will run a configuration application that will configure OpenMPI before actually compiling it. We’ll be using the /usr/local folder to host the OpenMPI installation.
Once OpenMPI is configured, you now need to run the make all command.
Finally, Install OpenMPI by running the sudo make install command. We’ll need sudo since we need administrative privileges to install applications. You will be prompted for your password, which won’t show up as you type it – that’s okay, just hit the return key when you’re done.
That’s it! OpenMPI should be successfully installed. You should be able to see new folders in your /usr/local folder. You can take a look at this directory in your Finder. If you haven’t installed anything except OpenMPI it should look similar to the screenshot hereunder.
Step 4 – Compiling and Installing John the Ripper from source
While OpenMPI took a little while to set up, it will be worth wile once we compile John, especially if you’re sporting a fast CPU on your machine!
Before we start to compile John, you need the latest Jumbo package. A Jumbo package is a community-enhanced package that implements some of the latest enhancements and tweaks from the John the Ripper community. Make sure you download the UNIX version and not the Windows version (in this case at least).
Unpack the archive file in which ever way suits you best. Once again, place the folder somewhere predictable. I placed it in my home directory and renamed it to jtr make things simpler.
Before we fire-up the terminal, we need to make some tweaks to the Makefile in our src directory (the Makefile is simply a file that tells the compiler how to build the program). For this we’ll need to have a good text-editor (you can use TextEdit if you like. But this should serve as an excuse to get your hands on a good text editor). If you like to work in the terminal, you can use nano, vi and the like. I’m using my favourite – SublimeText.
You’ll want to un-comment (remove the ‘#’ symbol at the front of the line) the two lines as follows (line numbers 23 and 24 at the time of writing) to enable OpenMPI in John.
We are now set to compile John. Simply fire-up a Terminal window and cd into the directory you placed John’s source and simply run make clean macosx-x86-64 to compile John.
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Step 5 – Additional configuration
By default, John does not compete for CPU cycles, but makes use of idle CPU cycles. Allowing John to compete for a share of the CPU speeds things up. While you can opt not to do this if you want to run John in the background, it’s recommended if you’re concerned about speed. In order to make changes to this configuration, from the newly compiled run directory, load john.conf into your text editor and uncomment the following line (currently line number 20 at the time of writing).
Step 6 – Running John
Let’s crack some passwords! First off, you’ll need a password list. If you don’t have one, just hash a few strings of characters using whatever hashing algorithm you like and throw it into a text file. hashes need to be one-per line.
Simply cd into the run directory and start the command with mpirun -np 8. 8, being the number of cores you want john to run on. You’ll need to append this with the actual command for John. So you can have something similar to the command hereunder, which will run 4 instances of John. Make sure you don’t omit the ./ in the command, or otherwise you’ll get an error thrown your way.
That ought to wrap things up. I feel obliged to say this – It’s up to you how use password cracking tools, just do so responsibly and ethically.
Related Posts
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John the Ripper is free and Open Source software,distributed primarily in source code form.If you would rather use a commercial product, please considerJohn the Ripper Pro,which is distributed primarily in the form of 'native' packagesfor the target operating systems and in general is meant to be easier toinstall and use while delivering optimal performance.
Proceed to John the Ripper Pro homepage for your OS:
Download the latest John the Ripper jumbo release(release notes) or development snapshot:
Run John the Ripper jumbo in the cloud (AWS):
Download the latest John the Ripper core release(release notes):
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These and older versions of John the Ripper, patches, unofficial builds, and many other related files are alsoavailable from the Openwall file archive.
You can browse the documentation for John the Ripper core online, including asummary of changes between core versions.Also relevant is ourpresentation on the history of password security.
There's a collection of wordlists for use with John the Ripper.It includes lists of common passwords, wordlists for 20+ human languages, and files with the common passwords andunique words for all the languages combined, also with mangling rules applied and any duplicates purged.
yescrypt and crypt_blowfishare implementations of yescrypt, scrypt, and bcrypt - some of the strong password hashes also found in John the Ripper -released separately for defensive use in your software or on your servers.
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passwdqc is a proactive password/passphrase strength checking and policy enforcement toolset,which can prevent your users from choosing passwords that would be easily cracked with programs like John the Ripper.
We can help you integrate modern password hashing withyescrypt or crypt_blowfish,and/or proactive password strength checking withpasswdqc,into your OS installs, software, or online services.Please check out our services.
There's a mailing list where you can share your experience with John the Ripper and ask questions.Please be sure to specify an informative message subject wheneveryou post to the list(that is, something better than 'question' or 'problem').To subscribe, enter your e-mail address below or send an empty message to<john-users-subscribe at lists.openwall.com>.You will be required to confirm your subscription by 'replying'to the automated confirmation request that will be sent to you.You will be able tounsubscribeat any time and we will not use your e-mailaddress for any other purpose or share it with a third party.However, if you post to the list, other subscribers and thoseviewing the archives may see your address(es) as specified on your message.The list archive is availablelocally and viaMARC.Additionally, there's alist of selected most useful and currently relevant postings on thecommunity wiki.
Contributed resources for John the Ripper:
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John the Ripper is part ofOwl,Debian GNU/Linux, Fedora Linux, Gentoo Linux, Mandriva Linux, SUSE Linux,and a number of other Linux distributions.It is in the ports/packages collections of FreeBSD, NetBSD, and OpenBSD.
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John the Ripper is a registered project withOpen Huband it is listed atSecTools.