From 692c90e8db0ce44ba970ced8cf4b81b9e0c6c465 Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Fri, 25 Jan 2019 15:34:49 +0100
Subject: [PATCH] Add script 'passwd_generator.sh'.

---
 snippets/passwd_generator.sh | 68 ++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100755 snippets/passwd_generator.sh

diff --git a/snippets/passwd_generator.sh b/snippets/passwd_generator.sh
new file mode 100755
index 0000000..283b33a
--- /dev/null
+++ b/snippets/passwd_generator.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+
+LENGTH=$1
+LENGTH=${LENGTH:=12}
+
+  
+is_number() {
+
+   return $(test ! -z "${1##*[!0-9]*}" > /dev/null 2>&1);
+
+   # - also possible
+   # -
+   #[[ ! -z "${1##*[!0-9]*}" ]] && return 0 || return 1
+   #return $([[ ! -z "${1##*[!0-9]*}" ]])
+}
+
+
+regexp_digit="([23456789].*){2}"
+regexp_special_char="([-_/\.%+~].*){2}"
+regexp_not_alowed="([0ODl18B])"
+
+if ! is_number $LENGTH ; then
+	echo ""
+	echo "   [ Error]: Given parameter for password length '$LENGTH' is NOT a positiv Number!"
+	echo ""
+	exit 1
+fi
+
+if [[ $LENGTH -le 9 ]]; then
+	echo ""
+	echo "   [ Error]: Given parameter for password length '$LENGTH' is too short!"
+	echo "             Minimum length is '10'."
+	echo ""
+	exit 1
+fi
+	
+
+
+for ((i=0; i<=9; i++)); do 
+
+   while [ 1 ] ; do
+
+      # - Generate Passwort
+      _passwd="$(head -c 300 /dev/urandom | tr -cd 'a-zA-Z0-9-_/\.%+~' | head -c $LENGTH)"
+      #echo "$_passwd"
+
+      # - Check Password
+      # -
+      if [[ "$_passwd" =~ $regexp_not_alowed ]] ; then
+         continue
+      fi
+      if [[ ! "$_passwd" =~ $regexp_special_char ]] ; then
+         continue
+      fi
+      if [[ ! "$_passwd" =~ $regexp_digit ]] ; then
+         continue
+      fi
+
+      echo -n "$i: " 
+      echo "$_passwd"
+
+      break
+
+   done
+   
+done
+
+exit 0