ps_invoke

#!/bin/bash

shopt -s lastpipe

read -r CMD

SCRIPT="$0"

# Check if powershell is 32 or 64 bit
# [Environment]::Is64BitProcess
# If current powershell is running in 32 bit:
#   64 Version: C:\Windows\SysNative
#   32 Version: C:\Windows\SystemWOW64
# If current powershell is running in 64 bit:
#   64 Version: C:\Windows\System32
#   32 Version: C:\Windows\SystemWOW64
PS_32="C:\\Windows\\SystemWOW\\WindowsPowerShell\\v1.0\\powershell.exe"
PS_64="C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"
OPTS="-NoP -NonI -W Hidden -Exec Bypass"

usage() {
  echo $1
  echo "$SCRIPT [-e] [-a 32|64]"
  exit 1
}

while getopts "hea:" o; do
  case "${o}" in
    e)
      ENCODED=true
      ;;
    a)
      if [[ ${OPTARG} == "32" ]]; then
        ARCH=32
      elif [[ ${OPTARG} == "64" ]]; then
	ARCH=64
      else
	usage "wrong arch ${OPTARG}"
      fi
      ;;
    h | *)
      usage
      ;;
  esac
done

function encode() {
  echo "$CMD" | iconv -t UNICODELITTLE | base64 | tr -d "\n"
}

if [ $ENCODED ]; then
  CMD=$(encode $CMD)
  OPTS="$OPTS -Encode"
else
  OPTS="$OPTS -Command"
fi

if [[ $ARCH -eq 32 ]];then
  PS=$PS_32
else
  PS=$PS_64
fi

echo "$PS $OPTS $CMD"