#!/bin/bash
#
# Populate the below variables before running the command
#
# Enter your connect key within the '' of YOUR_CONNECT_KEY='' with your orgs key found on the new system aside in the admin console
YOUR_CONNECT_KEY=''

# Enter the SECURETOKEN_ADMIN_USERNAME within the '' of SECURETOKEN_ADMIN_USERNAME=''
SECURETOKEN_ADMIN_USERNAME=''

# Enter the SECURETOKEN_ADMIN_PASSWORD within the '' of SECURETOKEN_ADMIN_PASSWORD='' with the credentials of the admin with a secure token
SECURETOKEN_ADMIN_PASSWORD=''

# Flag for installing without checking SECURETOKEN_ADMIN_USERNAME or SECURETOKEN_ADMIN_PASSWORD
SILENT_INSTALL=0

# Flag for installing without interactive prompts
UNATTENDED_INSTALL=0

# You can also specify one or more values with parameters
# -k YOUR_CONNECT_KEY -u SECURETOKEN_ADMIN_USERNAME -p SECURETOKEN_ADMIN_PASSWORD
while getopts k:u:p:shf option; do
  case "${option}" in
  k) YOUR_CONNECT_KEY=${OPTARG} ;;
  u) SECURETOKEN_ADMIN_USERNAME=${OPTARG} ;;
  p) SECURETOKEN_ADMIN_PASSWORD=${OPTARG} ;;
  h)
    printf "Options:
      -k        Your JumpCloud Connect Key
      -u        System Admin Username
      -p        System Admin Password\n\n"
    exit 0
    ;;
  s) SILENT_INSTALL=1 ;;
  f) UNATTENDED_INSTALL=1 ;;
  *) echo "Invalid parameter"
     exit 1
     ;;
  esac
done

#--------------------Do not modify below this line--------------------

MacOSMajorVersion=$(sw_vers -productVersion | cut -d '.' -f 1)
MacOSMinorVersion=$(sw_vers -productVersion | cut -d '.' -f 2)
MacOSPatchVersion=$(sw_vers -productVersion | cut -d '.' -f 3)

if [[ $MacOSMajorVersion -eq 10 && $MacOSMinorVersion -lt 13 ]]; then
  echo "Error:  Target system is not on macOS 10.13"
  exit 2
else

  # asks the user to confirm "y" or "n" before continuing
  confirmUserContinue() {
    while true; do
      read -p 'Continue (y/n)? ' confirmation
      case "$confirmation" in
        y|Y ) break ;;
        n|N ) exit 1 ;;
        * ) echo 'Invalid option. Please enter either "y" or "n" to continue' ;;
      esac
    done
  }

  # This function checks whether the given user is secure token enabled:
  secureTokenEnabledForUser() {
    # secure token is not supported on versions < 10.13
    if [[ "$MacOSMajorVersion" -eq 10 && "$MacOSMinorVersion" -lt 13 ]]; then
      return 1
    fi

    # on earlier versions of High Sierra, we should use dscl:
    if [[ "$MacOSMajorVersion" -eq 10 && "$MacOSMinorVersion" -eq 13 && "$MacOSPatchVersion" -lt 4 ]]; then
      if [[ $(dscl . read /Users/"$1" AuthenticationAuthority | grep ";SecureToken;" -c) -gt 0 ]]; then
        return 0 # success
      fi
    else # on 10.13.4 or higher we can just use sysadminctl to get the secureToken status without admin credentials:
      if [[ $(sysadminctl -secureTokenStatus "$1" 2>&1) == *"Secure token is ENABLED for user"* ]]; then
        return 0 # success
      fi
    fi

    return 1 # SecureToken is NOT enabled
  }

  isAdminUser() {
    if [ "$(id -Gn "$1" | grep -c -w admin)" -gt 0 ]; then
      return 0 # user is an admin
    fi

    return 1
  }

  checkAndReadInUsername() {
    printf "\nSecure Token enabled admin required\n"
    printf "Checking %s for Secure Token admin access\n" "${SECURETOKEN_ADMIN_USERNAME}"
    sleep 1
    if (secureTokenEnabledForUser "${SECURETOKEN_ADMIN_USERNAME}") && (isAdminUser "${SECURETOKEN_ADMIN_USERNAME}"); then
      echo "** ($SECURETOKEN_ADMIN_USERNAME) is verified as a Secure Token admin **"
      return 0
    fi
    echo "--------"

    while ! (secureTokenEnabledForUser "${SECURETOKEN_ADMIN_USERNAME}") || ! (isAdminUser "${SECURETOKEN_ADMIN_USERNAME}"); do
      printf "\nThe username: %s is not a Secure Token enabled admin.\nTo enable the JumpCloud Agent to manage FileVault users, \nplease provide the username of a Secure Token enabled \nadmin user on this system.\n" "${SECURETOKEN_ADMIN_USERNAME}"
      echo "--------"
      read -rp 'Secure Token Admin Username: ' SECURETOKEN_ADMIN_USERNAME
    done

    echo "** (${SECURETOKEN_ADMIN_USERNAME}) is verified as a Secure Token admin **"
    return 1
  }

  verifyPasswordForUser() {
    printf '\nVerifying Password\n'

    VERIFYPASSWORD=$(dscl /Local/Default -authonly "${SECURETOKEN_ADMIN_USERNAME}" "${SECURETOKEN_ADMIN_PASSWORD}")

    if [ -z "$VERIFYPASSWORD" ]; then
      return 0
    else
      return 1
    fi
  }

  readInPasswordForUser() {
    while true; do
      if [ -n "$SECURETOKEN_ADMIN_PASSWORD" ]; then
        if ! verifyPasswordForUser; then
          printf "\nERROR: Incorrect Password for user %s !\n" "${SECURETOKEN_ADMIN_USERNAME}"
        else
          printf "\nPassword verified for user %s \n" "${SECURETOKEN_ADMIN_USERNAME}"
          break
        fi
      else
        echo 'Password cannot be blank'
      fi

      read -rsp "Please enter the password for ${SECURETOKEN_ADMIN_USERNAME}:" SECURETOKEN_ADMIN_PASSWORD
      echo ''

    done
  }

 # Install Rosetta2 on M1 (Apple Silicon) Macs if not already installed
 installRosettaForM1() {
   BIG_SUR_MAJOR=11
   # Save current IFS (Input Field Separator) state
   OLDIFS=${IFS}
   # retrieve OS version info
   IFS='.' read -r osvers_major osvers_minor osvers_dot_version <<<"$(/usr/bin/sw_vers -productVersion)"
   # restore IFS to previous state
   IFS=${OLDIFS}

   if [[ ${osvers_major} -ge ${BIG_SUR_MAJOR} ]]; then
     # Check processor to see if we even need Rosetta2
     processor=$(/usr/sbin/sysctl -n machdep.cpu.brand_string | grep -o "Intel")
     if [[ -n "${processor}" ]]; then
       echo "Intel processor installed; no need to install Rosetta2"
     else
       # Check for an installer receipt for Rosetta. If no receipt is found,
       # perform a non-interactive install of Rosetta.
       rosetta_check=$(/usr/sbin/pkgutil --pkgs | grep "com.apple.pkg.RosettaUpdateAuto")
       if [[ -z "${rosetta_check}" ]]; then
         if ! /usr/sbin/softwareupdate --install-rosetta --agree-to-license; then
           echo "Rosetta installation failed!"
         else
           echo "Rosetta has been successfully installed."
         fi
       else
         echo "Rosetta is already installed. Nothing to do."
       fi
     fi
   else
     echo "System is running macOS ${osvers_major}.${osvers_minor}.${osvers_dot_version}."
     echo "No need to install Rosetta on this version of macOS."
   fi
 }

  # require connect key
  if [ -z "$YOUR_CONNECT_KEY" ]; then
    echo 'Connect key is required. Please provide one in the script or via the -k parameter'
    exit 1
  fi

  # check connect key length
  if [ ${#YOUR_CONNECT_KEY} != 40 ]; then
    echo 'Connect key is not 40 characters. Please provide a valid connect key in the script or via the -k parameter'
    exit 1
  fi

  # FDA is only needed on Monterey and later
  if [[ "$MacOSMajorVersion" -ge 12 ]]; then
    FDA_MESSAGE='JumpCloud requires Full Disk Access for our agent to properly configure the PAM Modules for authentication. During installation, System Preferences will open, and Full Disk Access will need to be manually allowed within 5 minutes to successfully complete the installation.'
    if [ "$UNATTENDED_INSTALL" -eq "0" ]; then
      printf "${FDA_MESSAGE}\n\nIf you are installing this with no user session (as root or over SSH), this installation may fail.\n\n"
      confirmUserContinue
    else
      printf "This command was invoked with the '-f' option disabling any user confirmation.\n\n${FDA_MESSAGE}\n"
    fi
  fi

  if [ "$SILENT_INSTALL" -eq "0" ]; then

    if [ -z "${SECURETOKEN_ADMIN_USERNAME}" ]; then
      # if empty, set SECURETOKEN_ADMIN_USERNAME to the user running the script
      SECURETOKEN_ADMIN_USERNAME=$(stat -f '%Su' "${HOME}")
    fi

    # check to make sure the user is a secure token enabled admin
    checkAndReadInUsername
    readInPasswordForUser

  fi

  # Install Rosetta2 for M1 (Apple Silicon) Macs
  installRosettaForM1

  curl --silent --output /tmp/jumpcloud-agent.pkg "https://cdn02.jumpcloud.com/production/jumpcloud-agent.pkg" >/dev/null
  mkdir -p /opt/jc
  cat <<-EOF >/opt/jc/agentBootstrap.json
{
"publicKickstartUrl": "https://kickstart.jumpcloud.com:443",
"privateKickstartUrl": "https://private-kickstart.jumpcloud.com:443",
"connectKey": "$YOUR_CONNECT_KEY"
}
EOF

  if [ "$SILENT_INSTALL" -eq "0" ]; then
    cat <<-EOF >/var/run/JumpCloud-SecureToken-Creds.txt
$SECURETOKEN_ADMIN_USERNAME;$SECURETOKEN_ADMIN_PASSWORD
EOF
  else
    cat <<-EOF >/var/run/JumpCloud-SecureToken-Creds.txt
=skip
EOF
  fi
  # The file JumpCloud-SecureToken-Creds.txt IS DELETED during the agent install process
  installer -pkg /tmp/jumpcloud-agent.pkg -target /
  result=$(echo "$?")
  if [[ $result -eq "0" ]];then
    echo "JumpCloud Agent Installed Successfully"
  else
    echo "JumpCloud Agent Install Failed"
    exit 1
  fi
fi
exit 0