I have a zip file containing a JPEG image of size 3.5 MB, encrypted with AES-256. I used WinZip for the creation of the zip file. In order to create the hash of the zip file, I used John The Ripper's zip2john which created 2 hashes, where the hashes starts and ends like this:
$zip2$*0*3*0*7076f893dbcdc27f228fa179ff990807*86eb*b0920* ... *$/zip2$ $pkzip2$1*1*2*0*b093c*b3abd*705a9e08*0*50*63*b093c*705a*6cf1* ... *$/pkzip2$
Now when i saved the hash to a textfile, the file size became 14.9 MB. In order to crack the password I have downloaded and compiled the latest hashcat (v5.1.0-1631-gcc4fd48a) from GitHub and PRINCE processor for word generation. Now when I start hashcat I get following error:
root@sam-workstation:~/Desktop/dddd# ./princeprocessor-0.22/pp64.bin < wl/mywords.txt --pw-min=8 --pw-max=20 | /installs/apps/hashcat/hashcat -a 0 -m 13600 -w 4 northern-lights-hash.txt hashcat (v5.1.0-1631-gcc4fd48a) starting... * Device #1: WARNING! Kernel exec timeout is not disabled. This may cause "CL_OUT_OF_RESOURCES" or related errors. To disable the timeout, see: https://hashcat.net/q/timeoutpatch * Device #3: WARNING! Kernel exec timeout is not disabled. This may cause "CL_OUT_OF_RESOURCES" or related errors. To disable the timeout, see: https://hashcat.net/q/timeoutpatch nvmlDeviceGetFanSpeed(): Not Supported CUDA API (CUDA 10.2) ==================== * Device #1: GeForce GTX 1660 Ti, 5092/5944 MB, 24MCU OpenCL API (OpenCL 2.1 ) - Platform #1 [Intel(R) Corporation] ============================================================= * Device #2: Intel(R) Gen9 HD Graphics NEO, 12671/12735 MB (4095 MB allocatable), 24MCU OpenCL API (OpenCL 1.2 CUDA 10.2.115) - Platform #2 [NVIDIA Corporation] ======================================================================== * Device #3: GeForce GTX 1660 Ti, skipped Minimum password length supported by kernel: 0 Maximum password length supported by kernel: 256 Counted lines in northern-lights-hash.txt... Oversized line detected! Truncated 14179435 bytes Oversized line detected! Truncated 14179435 bytes Hashfile 'northern-lights-hash.txt' on line 1 ($zip2$...9d33a3321d1f1654688b199af944ad41): Separator unmatched No hashes loaded.
But, hashcat doesn't return any error if the zip file contains a small txt file, of which the hash generated was also very small in size.
I couldn't figure out where the problem is. I am confused between whether JTR producing the wrong hash, or is hashcat designed to crack hashes with some max hash length.