From d8254a32bf790e74845943ff2cdd6ce90f7eed17 Mon Sep 17 00:00:00 2001
From: kneutron <50146127+kneutron@users.noreply.github.com>
Date: Wed, 7 Dec 2022 13:59:05 -0600
Subject: [PATCH] Find 5-number passcode for protected 7zip file

Find 5-number passcode for protected 7zip file
---
 unpass.sh | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 unpass.sh

diff --git a/unpass.sh b/unpass.sh
new file mode 100644
index 0000000..17b1f1b
--- /dev/null
+++ b/unpass.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+
+# Loop through the range of 0 - 99999 to find the 5-number passcode for a 7zip archive
+# REF: https://www.reddit.com/r/bash/comments/zey4h8/finding_a_5_digit_code_for_a_locked_zip_file/
+
+# https://youtu.be/B-NhD15ocwA?t=71
+# :B
+
+# Starts 2x parallel jobs, one counts up - the other counts down
+# NOTE everything including the .7z file is in /dev/shm (ramdisk) for speed
+
+# TESTs archive ONLY, does not extract it - but should give you the correct code if it finds it
+
+# REQUIRES: tee, 7z, seq
+# killall assumes Linux, other broken implementations may do the wrong thing
+
+logf=/dev/shm/unpass.log
+#archive=yxor.7z # leaving hardcoded for processing speed, only vars we really need are counternum and passcode
+date >$logf
+
+foundit () {
+  echo "$(date) FOUND IT $i $j" |tee -a $logf
+  cat /dev/shm/currentcode /dev/shm/currentcode2
+  ls -l
+#  exit 0
+  killall 7z
+  killall $(basename $0)
+}
+
+# if the password is in the 54000 range, shortcut to speed up testing
+#for i in $(seq -w 54000 55000); do
+for i in $(seq -w 0 49999); do
+	echo $i >/dev/shm/currentcode # use ramdisk 
+	7z t -p$i yxor.7z 2>&1>/dev/null ; [[ $? -eq 0 ]] && foundit # break
+done &
+
+for j in $(seq -w 99999 -1 50000 ); do
+        echo $j >/dev/shm/currentcode2 # use ramdisk 
+        7z t -p$j yxor.7z 2>&1>/dev/null ; [[ $? -eq 0 ]] && foundit
+done &
+
+wait;
+
+echo "$(date) - DID NOT FIND CODE" |tee -a $logf
+
+exit;
+
+# 2022.1207 kingneutron
+# To monitor the current password code, in another terminal:
+# $ while :; do cat /dev/shm/cur*; sleep 9; done	# ^C to quit this (do forever)
+#
+# Doing this does not slow down the processing