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Tag Archives: password cracking

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  2. Entries tagged with "password cracking"

John the Ripper Password Cracker

JTR – John The Ripper Compile Error – sha.h:4:25: fatal error: openssl/sha.h: No such file or directory

InsightsBy alexSeptember 2, 2013Leave a comment

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…

Technology Errors

Crark Error: File rarcrypt1.dll not found – this CUDA architecture not yet supported

ErrorsBy alexSeptember 20, 2010Leave a comment

I recently upgraded crark on a CentOS Linux server from an earlier version to Crark version 3.3a. Initially it looked as if everything worked without problems and the speeds were improved slightly over the previous version of crark I had installed. After the initial testing though I noticed an issue when attempting to run crark…

Information Security

Install oclHashcat On Windows 7 With NVIDIA GPU, Update Nvidia Drivers

SecurityBy alexAugust 14, 2010Leave a comment

I have been using Hashcat and oclHashcat a lot in recent weeks but have been limited to primarily using it on Linux servers so I decided to give it a shot on a couple Windows machines. Below I describe how I got oclHashcat operational on Windows 7 Ultimate 32-Bit on a desktop computer with a…

Information Security

Hashcat-gui: Save Charset Groups As Jobs To Crack Future Hashes

SecurityBy alexAugust 10, 2010Leave a comment

Recently I have started using Hashcat-gui a lot more to test the strength of various passwords for certain clients. One of the things I wasn’t sure of at first was how to save charsets in the Bruteforce Settings window and while it would be nice if you could have a text file that included various…

Technology Insights

Compile John the Ripper on x86-64 Cent OS with the Jumbo Patch

InsightsBy purehateJuly 5, 2010Leave a comment

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…

Information Security

OCLHashcat: Multi GPU Password Cracking on Linux using Open CL

SecurityBy purehateJune 20, 201010 Comments

Recently some pretty major advances have come around in the world of GPU based hash cracking. Up untill now there was not much for Linux which would utilize multi GPUs to crack password hashs. This has been changed with the release of Oclhashcat. The release of oclhashcat signifies a signifigant jump in the speed on…

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