UNIX OTP Tool

otp.json

[
    {
        "account": "My first account email@email.com",
        "key": "8SDFYSDNFSDFY89SDFSDF"
    },
    {
        "account": "My second account email@email.com",
        "key": "23849HFGDKLDFIAE"
    }
]

otp.sh

OTP_STORAGE='/full/path/to/otp.json'

PS3="Retrieve OTP: "
readarray -t options < <(jq '.[].account' ${OTP_STORAGE})

echo
select menu in "${options[@]}";
do
  echo
  echo "Token for ${menu}:"
  secret=$(jq -r --arg TOKEN_INDEX $REPLY '.[($TOKEN_INDEX | tonumber - 1)].key' ${OTP_STORAGE})
  token=$(oathtool --totp -b ${secret})
  echo ${token}
  # change this line below to use your system's clipboard!
  # WSL: clip.exe
  # MacOS: pbcopy
  # Ubuntu: xclip -i
  printf ${token} | pbcopy
  echo
  break;
done

Installation

MacOS

Install Homebrew if you don't already have it: https://brew.sh/

brew install oath-toolkit jq
mkdir ~/otp
curl 'https://gist.githubusercontent.com/Kas-tle/35222e0e021d02cfabc63cdecdf353a4/raw/otp.sh' -o '~/otp/otp.sh'
curl 'https://gist.githubusercontent.com/Kas-tle/35222e0e021d02cfabc63cdecdf353a4/raw/otp.json' -o '~/otp/otp.json'
chmod +x '~/otp/otp.sh'
echo 'alias otp=~/otp/otp.sh' >> ~/.zshrc
source ~/.zshrc

Ubuntu & Debian

sudo apt install oath-toolkit jq xclip
mkdir ~/otp
curl 'https://gist.githubusercontent.com/Kas-tle/35222e0e021d02cfabc63cdecdf353a4/raw/otp.sh' -o '~/otp/otp.sh'
curl 'https://gist.githubusercontent.com/Kas-tle/35222e0e021d02cfabc63cdecdf353a4/raw/otp.json' -o '~/otp/otp.json'
chmod +x '~/otp/otp.sh'
echo 'alias otp=~/otp/otp.sh' >> ~/.bashrc
source ~/.bashrc

Usage

Simply add keys and an account name for each to otp.json. You can then run otp as a command and enter a number for the one time password of the account you'd like to obtain. The OTP will be displayed and, assuming you've set it up, copied to your clipboard.