Crude example of using rules for the fourth word to accelerate performance of hashcat attack of 4-way Diceware (separated by spaces)

crude-diceware-acceleration.sh

#!/bin/bash
#-----------------------------------------------------------------------
# Crude example of using rules for the fourth word to accelerate
# performance of hashcat attack on a four-word Diceware passphrase,
# separated by spaces
#-----------------------------------------------------------------------
TEST_PLAIN="vine embalm blood micro"
TEST_MD5=$(echo -n ${TEST_PLAIN} | md5sum | awk '{print $1}')

pp64() { /usr/local/bin/pp64.bin $*; }

#-----------------------------------------------------------------------
# Remember to patch princeprocessor for longer password lengths.
#
# 28 = (6 (length of longest Diceware word) + 1 (prepended space)) x 4 (wordcount) = 28
# --- pp.c-dist   2019-01-14 21:33:46.443328919 -0900
# +++ pp.c        2019-01-14 21:28:24.224837741 -0900
# @@ -29,7 +29,7 @@
#  #define IN_LEN_MAX    32
#  #define OUT_LEN_MAX   32 /* Limited by (u32)(1 << pw_len - 1) */
#  #define PW_MIN        1
# -#define PW_MAX        16
# +#define PW_MAX        28
#  #define ELEM_CNT_MIN  1
#  #define ELEM_CNT_MAX  8
#  #define WL_DIST_LEN   0

#-----------------------------------------------------------------------
# Process Diceware list.

awk '$1=/[1-6]{5}/ {print $2}' diceware.wordlist.asc \
    > diceware.list

wc -l diceware.list
head diceware.list
echo ""

sed 's/^/ /g' diceware.list >diceware.space-prepended.list
wc -l diceware.space-prepended.list
head diceware.space-prepended.list
echo ""

#-----------------------------------------------------------------------
# Generate rules.

sed 's/\|/ $/g;s/^ /$  /g;s/\$$//g' diceware.list > diceware-pos4-space.rule
wc -l diceware-pos4-space.rule
head diceware-pos4-space.rule
echo ""

echo "- Test plain: ${TEST_PLAIN}"
echo "- Test MD5 ${TEST_MD5}"
echo ${TEST_MD5} >diceware.hash
ls -la diceware.hash
cat diceware.hash
echo ""

#-----------------------------------------------------------------------
# Test.
pp64 --elem-cnt-min=3 --elem-cnt-max=3 diceware.space-prepended.list \
    | cut -b2- \
    | hashcat -w 4 -O -m 0 -a 0 -r diceware-pos4-space.rule diceware.hash

#-----------------------------------------------------------------------
exit

#-----------------------------------------------------------------------
# Performance is definitely meh (and notice GPU utilization %) ...
# (basically, ~7.4% of benchmark):
#
Session..........: hashcat
Status...........: Running
Hash.Type........: MD5
Hash.Target......: 54b349e56ab283229119a203065eaf48
Time.Started.....: Mon Jan 14 21:36:29 2019 (29 secs)
Time.Estimated...: Mon Jan 14 21:36:58 2019 (0 secs)
Guess.Base.......: Pipe
Guess.Mod........: Rules (diceware-pos4-space.rule)
Speed.#1.........:  1860.4 MH/s (23.87ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#2.........:  1858.9 MH/s (24.47ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#3.........:  1843.1 MH/s (24.34ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#4.........:  1843.3 MH/s (24.07ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#5.........:  1841.1 MH/s (23.89ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#6.........:  1791.2 MH/s (24.19ms) @ Accel:128 Loops:256 Thr:256 Vec:1
Speed.#*.........: 10889.1 MH/s
Recovered........: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.........: 293496422400
Rejected.........: 0
Restore.Point....: 0
Restore.Sub.#1...: Salt:0 Amplifier:0-256 Iteration:0-256
Restore.Sub.#2...: Salt:0 Amplifier:7680-7776 Iteration:0-256
Restore.Sub.#3...: Salt:0 Amplifier:7680-7776 Iteration:0-256
Restore.Sub.#4...: Salt:0 Amplifier:7680-7776 Iteration:0-256
Restore.Sub.#5...: Salt:0 Amplifier:7680-7776 Iteration:0-256
Restore.Sub.#6...: Salt:0 Amplifier:4608-4864 Iteration:0-256
Candidates.#1....: o idle n a -> g 1975 abject amulet
Candidates.#2....: x vent g 33rd -> l gd gt @
Candidates.#3....: 2 kc hd 33rd -> 9 # merle @
Candidates.#4....: m gd gt 33rd -> 1 kc hd @
Candidates.#5....: ! # merle 33rd -> t mz hr @
Candidates.#6....: u mz hr oint -> n idle n persia
Hardware.Mon.#1..: Temp: 37c Fan: 80% Util:  0% Core:1911MHz Mem:4513MHz Bus:8
Hardware.Mon.#2..: Temp: 36c Fan: 80% Util:  0% Core:1873MHz Mem:4513MHz Bus:4
Hardware.Mon.#3..: Temp: 44c Fan: 80% Util:  0% Core:1885MHz Mem:4513MHz Bus:16
Hardware.Mon.#4..: Temp: 40c Fan: 80% Util:  0% Core:1885MHz Mem:4513MHz Bus:4
Hardware.Mon.#5..: Temp: 37c Fan: 80% Util: 46% Core:1911MHz Mem:4513MHz Bus:1
Hardware.Mon.#6..: Temp: 40c Fan: 80% Util:100% Core:1898MHz Mem:4513MHz Bus:1

#-----------------------------------------------------------------------
# ... compared to benchmark (on same system with same parameters):
#
$ hashcat -b -m 0 -w 4 -O
hashcat (v5.1.0-25-g050b54b8) starting in benchmark mode...

OpenCL Platform #1: NVIDIA Corporation
======================================
* Device #1: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU
* Device #2: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU
* Device #3: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU
* Device #4: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU
* Device #5: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU
* Device #6: GeForce GTX 1080, 2029/8119 MB allocatable, 20MCU

OpenCL Platform #2: Advanced Micro Devices, Inc.
================================================
* Device #7: AMD FX(tm)-8350 Eight-Core Processor, skipped.

Benchmark relevant options:
===========================
* --optimized-kernel-enable
* --workload-profile=4

Hashmode: 0 - MD5

Speed.#1.........: 24851.6 MH/s (26.85ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#2.........: 24476.5 MH/s (27.22ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#3.........: 24605.6 MH/s (27.08ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#4.........: 24723.0 MH/s (26.95ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#5.........: 24844.6 MH/s (26.78ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#6.........: 24730.8 MH/s (26.84ms) @ Accel:128 Loops:1024 Thr:256 Vec:4
Speed.#*.........:   148.2 GH/s

Started: Mon Jan 14 21:41:00 2019
Stopped: Mon Jan 14 21:41:21 2019
#-----------------------------------------------------------------------