passman

#!/bin/bash - 
#===============================================================================
#
#          FILE: passman.sh
# 
#         USAGE: ./passman.sh [-option]
# 
#   DESCRIPTION: A tiny password manager for the command line. Uses openssl rsautl encryption.
# 
#       OPTIONS: -a to add a new account and password; -g to get the password for an account
#  REQUIREMENTS: xclip, openssl
#          BUGS: ---
#         NOTES: ---
#        AUTHOR: Gabriel Silva Miranda
#       CREATED: 10/10/2019 16:44
#      REVISION:  ---
#===============================================================================

set -o nounset                              # Treat unset variables as an error

help(){
    echo -e "usage: passman [option]\n\nOptions:\n\t-a\tAdd an account and password\n\t-g\tGet the password for an account\n\t-l\tList password files\n"
}

genKey(){
    echo "No key found! Would you like to generate a key? y/n"
    local option
    read option
    if [[ "$option" == "y" ]] || [[ "$option" == "Y" ]];
    then
        openssl genrsa -aes256 -out ~/.local/bin/.key 2048
    elif [[ "$option" == "n" ]] || [[ "$option" == "N" ]];
    then
        echo "Closing!"
        exit
    else
        genKey
    fi
}

encryptPass(){
    local user
    local pass
    read -p "Enter an account name: " user
    read -p "Enter a password: " -s pass
    echo $pass | openssl rsautl -inkey $HOME/.local/bin/.key -encrypt  >> ~/.local/share/passwords/$user.bin
    echo -e "\nDone!"
}

decryptPass(){
    local user
    read -p "Enter the account name: " user
    findfile=`find ~/.local/share/passwords/$user.bin 2>/dev/null`
    if [ "$findfile" == "$HOME/.local/share/passwords/$user.bin" ];
    then
        openssl rsautl -inkey $HOME/.local/bin/.key -decrypt < ~/.local/share/passwords/$user.bin | xclip -selection c
        echo "The password was sent to your clipboard (Ctrl+V)!"
    else
        echo "No match found!"
    fi
}

listPass(){
    ls ~/.local/share/passwords/
}

findkey=`find ~/.local/bin/.key 2>/dev/null`
findpass=`find ~/.local/share/passwords -maxdepth 0 2>/dev/null`


if (($# > 0)); then
    case $1 in
        -a)
            if [ "$findkey" == "$HOME/.local/bin/.key" ];
            then
                if [ "$findpass" == "$HOME/.local/share/passwords" ];
                then
                    encryptPass
                else
                    mkdir ~/.local/share/passwords
                    encryptPass
                fi
            else
                genKey
                if [ "$findpass" == "$HOME/.local/share/passwords" ];
                then
                    encryptPass
                else
                    mkdir ~/.local/share/passwords
                    encryptPass
                fi
            fi
            ;;
        -g)
            if [ "$findpass" == "$HOME/.local/share/passwords" ];
            then
                decryptPass
            else
                echo "There are no passwords stored!"
            fi
            ;;
        -l)
            if [ "$findpass" == "$HOME/.local/share/passwords" ];
            then
                listPass
            else
                mkdir ~/.local/share/passwords
                echo "There ano no passwords stored! Password directory created"
            fi
            ;;
        *)
            help
            ;;
    esac
else help
fi