shellPass.sh

#!/usr/bin/env bash

export LANG=C
#----------------------------------------------------|
#  Matheus Martins 3mhenrique@gmail.com
#  https://github.com/mateuscomh/yoURL
#  30/03/2021 3.5.1 GPL3
#  Generate secure passwords on terminal
#  Depends: xclip on GNU/Linux / pbcopy on IOS
#----------------------------------------------------|

FECHA="\033[m"
BOLD=$(tput bold)
ITALIC=$(tput dim)

main() {
	local VERSION="Ver:3.5.1"
	local AUTHOR="Matheus Martins-3mhenrique@gmail.com"
	local USAGE="Generate random passwords from CLI
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╚══════╝╚═╝  ╚═╝╚══════╝╚══════╝╚══════╝╚═╝     ╚═╝  ╚═╝╚═▀▀▀══╝╚═▀▀▀══╝ "
	local MAX="$1"
	local TIPO="$2"
	echo -e "$USAGE"
	case "$MAX" in
	v | -v | h | -h | --version)
		echo -e "${ITALIC} $VERSION / $AUTHOR ${FECHA}"
		return
		;;
	*)
		echo "$VERSION"
		_checkSize
		_checkType
		;;
	esac

	case "$TIPO" in
	1)
		CPX='0-9'
		;;
	2)
		CPX='a-z0-9A-Z'
		;;
	3)
		CPX='A-Za-z0-9!"#$%&'\''()*+,-./:;<=>?@[\]^_{|}~'
		;;
	q | Q)
		echo "Bye..."
		exit
		;;
	esac
	_makePass
	_writeinfile
}

_checkSize() {
	while [[ -z "$MAX" || "$MAX" == *[^[:digit:]]* || "$MAX" -lt 1 ]]; do
		echo -e "${BOLD} Enter the QUANTITY of characters for the password or [Q]uit: ${FECHA}"
		read -r MAX
		[[ $MAX == [qQ] ]] && echo "Bye..." && exit 0
	done
}

_checkType() {
	while [[ "$TIPO" != [1-3] && "$TIPO" != [qQ] ]]; do
		echo -e "${BOLD} Enter the TYPE [1,2,3] for password complexity you want or [Q]uit ${FECHA}
    ${ITALIC} 1 - Password only numbers ${FECHA}
    ${ITALIC} 2 - Password with LeTtErS and numb3rs ${FECHA}
    ${ITALIC} 3 - Password with LeTtErS, numb3rs and Sp3c1@l Ch@r@ct&rs ${FECHA}"
		read -rsn 1 TIPO
	done
}

_writeinfile() {
	SCRIPT_PATH="${BASH_SOURCE:-$0}"
	ABS_SCRIPT_PATH="$(readlink -f "${SCRIPT_PATH}")"
	ABS_DIRECTORY="$(dirname "${ABS_SCRIPT_PATH}")"
	echo "$(date '+%d/%m/%y %H:%M:%S') - $PASS" >>"$ABS_DIRECTORY"/history.log
}

_makePass() {
	if PASS=$(tr -dc "$CPX" </dev/urandom | head -c "$MAX"); then
		echo -e "${BOLD}$PASS${FECHA}"
		case $(uname -s) in
		Darwin) printf %s "$PASS" | pbcopy 2>/dev/null ;;
		Linux)
			if grep -iq Microsoft /proc/version; then
				printf "%s" "$PASS" | clip.exe
			elif command -v xclip >/dev/null && [ -n "$DISPLAY" ]; then
				printf "%s" "$PASS" | xclip -sel clip
			fi
			;;
		*)
			echo "This is compatible only for GNU/Linux, MacOS or WSL2"
			exit 1
			;;
		esac
	fi
}
#---Main
main "$1" "$2"