Secure File Wipe

.bash_profile

#
# @author: Zach Jetson
#

# Secure File Wiper
#
# Add this function to the bottom of your bash profile for a quick 
# and dirty secure file clean.  Works with Linux & MacOS.
secure_delete() {
	DD_FILE=$1
	BLK_SZ=`wc -c < $DD_FILE`
  [[ BLK_SZ -eq 0 ]] && echo "[!] Invalid file" && return
	echo "Zeroing file ${DD_FILE}"
	dd if=/dev/zero of=$DD_FILE count=1 conv=notrunc bs=$BLK_SZ 2> /dev/null
	rm -f "$DD_FILE"
	echo "[!] Securely erased $BLK_SZ bytes"
}

# Even more secure wiper
super_secure_delete(){
  DD_FILE=$1
	BLK_SZ=`wc -c < $DD_FILE`
  [[ BLK_SZ -eq 0 ]] && echo "[!] Invalid file" && return
  echo "DoD grade file erase ${DD_FILE}"
  for ((n=1;n<8;n++))
  do 
      dd if=/dev/zero of=$DD_FILE count=1 conv=notrunc bs=$BLK_SZ 2> /dev/null
  done
	rm -f "$DD_FILE"
	echo "[!] Securely erased $BLK_SZ bytes"
}

# Hide desktop icons in MacOS
hide_desktop_icons(){
  echo "Hiding desktop icons"
  defaults write com.apple.finder CreateDesktop false
  killall Finder
}

show_desktop_icons(){
  defaults write com.apple.finder CreateDesktop true
  killall Finder
}

#
# Handy Methods
# ---------------------

# Interrogate SSL
ssl_interrogate_remote(){
  HOST=$1
  if [ -z "$HOST" ]; then
    echo "[!] Error: missing domain in argument"
    echo
    echo "usage:   ssl_remotecert domain"
    echo
    echo "  domain\tThe domain to query for SSL certs"
    echo
  else
    echo | openssl s_client -servername $HOST -connect $HOST:443 2>/dev/null | openssl x509 -noout -text
  fi
}