204 lines
7.3 KiB
Bash
204 lines
7.3 KiB
Bash
#!/usr/bin/env bash
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# ------------------------------------------------------------------------------
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# Copyright (c) 2013-2022 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
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# Protected by the BSD3 license. Please read bellow for details.
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#
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# * Redistribution and use in source and binary forms,
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# * with or without modification, are permitted provided
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# * that the following conditions are met:
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# *
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# * Redistributions of source code must retain the above
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# * copyright notice, this list of conditions and the
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# * following disclaimer.
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# *
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# * Redistributions in binary form must reproduce the above
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# * copyright notice, this list of conditions and the following
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# * disclaimer in the documentation and/or other materials
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# * provided with the distribution.
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# *
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# * Neither the name of the copyright holder nor the names
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# * of any other contributors may be used to endorse or
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# * promote products derived from this software without
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# * specific prior written permission.
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# *
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# * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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# * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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# * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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# * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# * OF SUCH DAMAGE.
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# ------------------------------------------------------------------------------
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# ------------------------------------------------------------------------------
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# genpwd : generate a password with different criteria
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# Usage: genpwd [options] [--extracars=<cars>] [--length=<n>] [nb_passwd]
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# Options:
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# -h, --help Display that help screen
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# -s, --nosymbols Exclude symbols
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# -n, --nonumbers Exclude numbers
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# -u, --noup Exclude uppercase letters
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# -l, --nolow Exclude lowercase letters
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# -e=<c>, --extracars=<c>
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# Add the given caracters to the possible caracter list
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# -L=<n>, --length=<n>
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# Set length of the password (default is 16)
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# -o=<n>, --occurences=<n>
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# Set the maximum occurences of a same caracter (default is 2)
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# The function is very slow on Windows
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genpwd()
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{
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local length=16
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local occurs=2 # Bug, if set to 1, seems to be ignored
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local symb=1 maj=1 min=1 numb=1
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local nbpwd=1
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local extcar
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local PARSED
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PARSED=$(getopt -o hsnu l e:L:o: --long \
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help,nosymbols,nonumbers,noup,nolow,extracars:,length:,occurences: -n 'genpwd' -- "$@")
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if [[ $? -ne 0 ]]; then return 1; fi
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eval set -- "$PARSED"
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while true; do
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case "$1" in
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-h|--help)
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printf "genpwd: Generate secure random password(s).\n\n"
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printf "Usage: genpwd [options] [nb_passwd]\n\n"
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printf "Options:\n"
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printf "\t-h, --help\t\tDisplay this help screen\n"
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printf "\t-s, --nosymbols\t\tExclude symbols\n"
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printf "\t-n, --nonumbers\t\tExclude numbers\n"
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printf "\t-u, --noup\t\tExclude uppercase letters\n"
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printf "\t-l, --nolow\t\tExclude lowercase letters\n"
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printf "\t-e, --extracars <c>\tAdd characters to list\n"
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printf "\t-L, --length <n>\tSet password length (default: 16)\n"
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printf "\t-o, --occurences <n>\tMax occurences per character (default: 2)\n"
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return 0
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;;
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-s|--nosymbols)
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symb=0
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shift
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;;
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-n|--nonumbers)
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numb=0
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shift
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;;
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-u|--noup)
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maj=0
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shift
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;;
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-l|--nolow)
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min=0
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shift
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;;
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-e|--extracars)
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extcar="$2"
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shift 2
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;;
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-L|--length)
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length="$2"
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if ! [[ $length =~ ^[0-9]+$ ]]; then
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disp E "The --length parameter requires a number."
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return 1
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fi
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shift 2
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;;
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-o|--occurences)
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occurs="$2"
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if ! [[ $occurs =~ ^[1-9]+$ ]]; then
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disp E "The --occurs parameter requires a number from 1 to 9."
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return 1
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fi
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shift 2
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;;
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--)
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shift; break
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;;
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*)
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break
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;;
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esac
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done
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if [[ -n "$1" ]]; then
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nbpwd="$1"
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if ! [[ $nbpwd =~ ^[0-9]+$ ]]; then
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disp E "The number of password to generate must be a number."
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return 1
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fi
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fi
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# Function selecting a random caracter from the list in parameter
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pickcar() {
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# When a character is picked we check if it's not appearing already twice
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# elsewhere, we choose an other char, to compensate weak bash randomizer
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while [[ -z $char ]]; do
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local char="${1:RANDOM%${#1}:1} $RANDOM"
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if [[ $(awk -F"$char" '{print NF-1}' <<<"$picked") -gt $occurs ]]; then
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unset char
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fi
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done
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picked+="$char"
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echo "$char"
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}
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disp I "Generating $nbpwd passwords, please wait..."
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for (( n=1; n<=nbpwd; n++ )); do
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{
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local carset='' # store final caracter set to use
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local picked='' # store already used caracter
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local rlength=0 # store already assigned length of caracters
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# ?, *, $ and \ impossible to use to my knowledge as it would be interpreted
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if [[ $symb == 1 ]]; then
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pickcar '!.@#&%/^-_'
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carset+='!.@#&%/^-_'
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((rlength++))
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fi
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if [[ $numb == 1 ]]; then
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pickcar '0123456789'
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carset+='0123456789'
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((rlength++))
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fi
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if [[ $maj == 1 ]]; then
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pickcar 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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carset+='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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((rlength++))
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fi
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if [[ $min == 1 ]]; then
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pickcar 'abcdefghijklmnopqrstuvwxyz'
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carset+='abcdefghijklmnopqrstuvwxyz'
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((rlength++))
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fi
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if [[ -n $extcar ]]; then
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pickcar "$extcar"
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carset+=$extcar
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((rlength++))
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fi
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# Check if we have enough car to have something viable
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if [[ ${#carset} -lt $length ]]; then
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disp E 'Not enought caracters are authorised for the password length.'
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disp E 'Please allow more caracter (preferably) or reduce password lentgh.'
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return 1
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fi
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for i in $(seq 1 $(($length - $rlength))); do
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pickcar "$carset"
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done
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} | sort -R | awk '{printf "%s", $1}'
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unset picked carset rlength
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echo
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done
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}
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export -f genpwd
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# ------------------------------------------------------------------------------
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# EOF
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