Color output for GnuPG

colorgpg.bash

# All my gist code is licensed under the terms of the MIT license.

# Video demo: https://www.youtube.com/watch?v=cDlWF48xaGQ

# Add this to your .bashrc

# custom gpg
# - add color output
# - replace $HOME with ~
# - Add footer with explanation of terms
#
# Note: For this to work, make sure your gpg.conf has the following lines:
#   with-fingerprint
#   with-subkey-fingerprint
#   keyid-format 0xlong
function gpg () {
  local bold='\x1b[1m';
  local green='\x1b[32m';
  local blue='\x1b[34m';
  local yellow='\x1b[33m';
  local cyan='\x1b[36m';
  local purple='\x1b[35m';
  local reset='\x1b[0m'; 

  # if command contains --list-key, --list-keys, --list-secret-key,
  # --list-secret-keys or --list-public-keys
  if [[ "$@" =~ --list-(secret|public)?-?keys? ]]; then
    local output="$(command gpg "$@")"

    if [[ -z "$output" ]]; then
      return $?
    fi

    sed -e 's/(Key fingerprint \=)/'$yellow'\1'$reset'/g' \
        -e 's/(.*\.kbx)/'$yellow'Keyring: \1'$reset'/g' \
        -e 's/^uid[[:blank:]]+/uid   /g' \
        -e 's/(^uid.*\] )(.*)/\1'$green'\2'$reset'/g' \
        -e 's/(\[.*\])/'$cyan'\1'$reset'/g' \
        -e 's/(^pub|^sec)/'$bold$green'\1'$reset'/g' \
        -e 's/(^sub|^ssb|^uid)/'$bold'\1'$reset'/g' \
        -e 's/(\[expires: )([0-9]{4}-[0-9]{2}-[0-9]{2})(\].*)/'$cyan'\1'$blue'\2'$cyan'\3'$reset'/g' \
        -e 's/([0-9]{4}-[0-9]{2}-[0-9]{2})/'$blue'\1'$reset'/g' \
        -e 's/^$/------------------------------------------/g' \
        -e 's| ([[:alnum:]]*)/| '$purple'\1'$reset'/|g' \
        -e 's|'$HOME'|~|' <<< "$output"

    # print info footer
    local info_footer="------------------------------------------\n"

    info_footer+="${cyan}E${reset}=encryption, "
    info_footer+="${cyan}S${reset}=signing, "
    info_footer+="${cyan}C${reset}=certification, "
    info_footer+="${cyan}A${reset}=authentication\n"

    info_footer+="${green}${bold}pub${reset}=public primary key, "
    info_footer+="${bold}sub${reset}=public subkey,\n"

    info_footer+="${green}${bold}sec${reset}=secret primary key, "
    info_footer+="${bold}ssb${reset}=secret subkey,\n"

    info_footer+="${bold}uid${reset}=user ID, ${purple}algorithm${reset}/${bold}key-ID${reset}"
    echo -e "$info_footer"
  else
    command gpg "$@"
  fi
}