The article below describes an error received while attempting to compile John The Ripper with GPU support via OpenCL on Ubuntu Linux version 12.04 LTS also known as Precise Pangolin. Many compile errors are related to necessary packages not being installed on Linux though other errors could be related to all sorts of different issues…
Recently while attempting to get John The Ripper 1.7.9 jumbo-7 working on a Ubuntu 12.04 LTS Linux server with multiple AMD GPU cards in it I ran across an error during the compile process. The error complained about the VL/cl.h file not being installed and thus could not finishing compiling. Below I describe the compile…
Earlier while compiling JTR or John The Ripper password cracker on a new Ubuntu 12.04 LTS server I received a compile error. The error compiling JTR, which is noted in more detail below, pointed to the sha.h file not being found which likely means there is a missing package though I have seen other causes…
As you know we think that oclHashcat is one of the best password crackers available and along with Hashcat and John The Ripper are pretty much the only password crackers we use at this point. Earlier someone asked me to crack some OpenLDAP hashes which come in SHA and SSHA format and the below example…
Recently I needed to find out information about a Juniper router password which is stored as a hash in the router configuration. The tricky part is while the password hash is technically a MD5 hash it is modified to make it unique and make it harder to crack. Luckily there is a way to crack…
I am getting ready for a password contest at Defcon that Alex and I and a few other guys from the Hashcat team are going to enter and I decided to install John the Ripper on a Cent OS box in case I needed it for anything. John is in the yum repos however the…