Secure File Wiper BashProfile

Secure File Wiper

# Secure File Wiper
#
# Description
# Add this function to the bottom of your bash profile for a quick 
# and dirty secure file clean.  Works with Linux & MacOS.
#
# @author: Zach Jetson
#

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"
}

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"
}