BASH - Generate-Password.sh
From IT-Arts.net
Script
#!/bin/bash
#
# Script based on pwgen package, where :
#
# -N, --num-passwords=num | Generate num passwords.
#
# -s, --secure | Generate completely random, hard-to-memorize passwords.
# These should only be used for machine passwords, since otherwise
# it's almost guaranteed that users will simply write the password
# on a piece of paper taped to the monitor...
#
# -y, --symbols | Include at least one special character in the password.
#
# $1, '-y' option or password length
#
# $2, password length if '-y' option is used
exclude_chars="iI1oO0"
# Function to filter out excluded characters
filter_password() {
local password=$1
for char in $(echo $exclude_chars | sed 's/\(.\)/\1 /g'); do
password=$(echo $password | tr -d $char)
done
echo $password
}
# Function to regenerate password until it reaches desired length
generate_password() {
local length=$1
local include_symbols=$2
local password=""
while true; do
if [ "$include_symbols" == "yes" ]; then
# Generate password with symbols (using -y option of pwgen)
password=$(pwgen -N 1 -s -y $length) # The -y option guarantees at least one symbol
else
# Generate password without symbols
password=$(pwgen -N 1 $length)
fi
# Apply the filter to exclude unwanted characters
filtered_password=$(filter_password "$password")
# If the filtered password is long enough, return it
if [ ${#filtered_password} -ge $length ]; then
echo $filtered_password
break
fi
done
}
if [ "$1" = "-y" ]; then
# Generate password with symbols and filter unwanted characters
password=$(generate_password "$2" "yes")
echo "PASSWORD WITH SPECIAL CHARS : "
echo $password
elif [[ "$1" =~ ^[0-9]+$ ]]; then
# Generate password without symbols and filter unwanted characters
password=$(generate_password "$1" "no")
echo "PASSWORD WITHOUT SPECIAL CHARS : "
echo $password
else
echo "USAGE: ./this-script.sh <'-y' for symbols> <Password Length integer>"
fi
exit 0
Source
This script is based on Package:
pwgen Version: 2.08-2 Installed-Size: 51 Maintainer: Theodore Y. Ts'o <tytso@mit.edu> Architecture: amd64 Depends: libc6 (>= 2.14) Description-en: Automatic Password generation pwgen generates random, meaningless but pronounceable passwords. These passwords contain either only lowercase letters, or upper and lower case mixed, or digits thrown in. Uppercase letters and digits are placed in a way that eases remembering their position when memorizing only the word.
