#!/bin/bash

# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

set -e

# nocturne does not support unibuild, so the cros_config command will exit
# with error and not print a board.
readonly _BOARD="$(cros_config /fingerprint board || true)"

# TODO(b/149590275): remove once fixed
if [[ "${_BOARD}" == "bloonchipper" ]]; then
  readonly _FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED="$(cat <<SETVAR
Flash protect flags: 0x0000040f wp_gpio_asserted ro_at_boot ro_now rollback_now all_now
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000000
SETVAR
  )"
else
  readonly _FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED="$(cat <<SETVAR
Flash protect flags: 0x0000000b wp_gpio_asserted ro_at_boot ro_now
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000004 all_now
SETVAR
  )"
fi

if [[ "${_BOARD}" == "bloonchipper" ]]; then
  readonly _FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED_RO="$(cat <<SETVAR
Flash protect flags: 0x0000000b wp_gpio_asserted ro_at_boot ro_now
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000004 all_now
SETVAR
  )"
else
  readonly _FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED_RO="${_FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED}"
fi

readonly _FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_DISABLED="$(cat <<SETVAR
Flash protect flags: 0x00000000
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000001 ro_at_boot
SETVAR
)"

# TODO(b/149590275): remove once fixed
if [[ "${_BOARD}" == "bloonchipper" ]]; then
  readonly _FLASHPROTECT_OUTPUT_HW_WRITE_PROTECT_DISABLED_AND_SW_WRITE_PROTECT_ENABLED="$(cat <<SETVAR
Flash protect flags: 0x00000407 ro_at_boot ro_now rollback_now all_now
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000000
SETVAR
)"
else
  readonly _FLASHPROTECT_OUTPUT_HW_WRITE_PROTECT_DISABLED_AND_SW_WRITE_PROTECT_ENABLED="$(cat <<SETVAR
Flash protect flags: 0x00000003 ro_at_boot ro_now
Valid flags:         0x0000003f wp_gpio_asserted ro_at_boot ro_now all_now STUCK INCONSISTENT
Writable flags:      0x00000000
SETVAR
  )"
fi

# SYSTEM_IS_LOCKED
# SYSTEM_JUMP_ENABLED
# SYSTEM_JUMPED_TO_CURRENT_IMAGE
# See https://chromium.googlesource.com/chromiumos/platform/ec/+/10fe09bf9aaf59213d141fc1d479ed259f786049/include/ec_commands.h#1865
readonly _SYSINFO_SYSTEM_IS_LOCKED_FLAGS="0x0000000d"

if [[ "${_BOARD}" == "bloonchipper" ]]; then
  readonly _ROLLBACK_FLASH_OFFSET="0x20000"
else
  readonly _ROLLBACK_FLASH_OFFSET="0xe0000"
fi

readonly _FP_FRAME_RAW_ACCESS_DENIED_ERROR="$(cat <<SETVAR
EC result 4 (ACCESS_DENIED)
Failed to get FP sensor frame
SETVAR
)"

readonly _FW_NAMES="rb0 rb1 rb9 dev"
readonly _FW_TYPES="ro rw"

flash_rw_firmware() {
  local fw_file="${1}"
  check_file_exists "${fw_file}"
  flashrom --fast-verify -V -p ec:type=fp -i EC_RW -w "${fw_file}"
}

get_ectool_output_val() {
  local key="${1}"
  local ectool_output="${2}"
  echo "${ectool_output}" | grep "${key}" | sed "s#${key}:[[:space:]]*\.*##"
}

run_ectool_cmd() {
  local ectool_output
  ectool_output="$(ectool --name=cros_fp "${@}")"
  if [[ $? -ne 0 ]]; then
    echo "Failed to run ectool cmd: ${@}"
    exit 1
  fi
  echo "${ectool_output}"
}

run_ectool_cmd_ignoring_error() {
  ectool --name=cros_fp "${@}" || true
}

add_entropy() {
  run_ectool_cmd "addentropy" "${@}"
}

reboot_ec() {
  # TODO(b/116396469): The reboot_ec command returns an error even on success.
  run_ectool_cmd_ignoring_error "reboot_ec"
  sleep 2
}

reboot_ec_to_ro() {
  # TODO(b/116396469): The reboot_ec command returns an error even on success.
  run_ectool_cmd_ignoring_error "reboot_ec"
  sleep 0.5
  run_ectool_cmd "rwsigaction" "abort"
  sleep 2
}

get_raw_fpframe() {
  run_ectool_cmd "fpframe" "raw"
}

check_raw_fpframe_fails() {
  local stderr_output_file="$(mktemp)"
  # Using sub-shell since we have "set -e" enabled
  if (get_raw_fpframe 2> "${stderr_output_file}"); then
    echo "Firmware should not allow getting raw fpframe"
    exit 1
  fi

  local stderr_output="$(cat "${stderr_output_file}")"
  if [[ "${stderr_output}" != "${_FP_FRAME_RAW_ACCESS_DENIED_ERROR}" ]]; then
    echo "raw fpframe command returned unexpected value"
    echo "stderr_output: ${stderr_output}"
    exit 1
  fi
}

read_from_flash() {
  local output_file="${1}"
  run_ectool_cmd "flashread" "${_ROLLBACK_FLASH_OFFSET}" "0x1000" "${output_file}"
}

read_from_flash_in_bootloader_mode_without_modifying_RDP_level() {
  local output_file="${1}"
  flash_fp_mcu --read --noremove_flash_read_protect "${output_file}"
}

read_from_flash_in_bootloader_mode_while_setting_RDP_to_level_0() {
  local output_file="${1}"
  flash_fp_mcu --read "${output_file}"
}


get_sysinfo_flags() {
  run_ectool_cmd "sysinfo" "flags"
}

get_running_firmware_copy() {
  local ectool_output
  ectool_output="$(run_ectool_cmd "version")"
  get_ectool_output_val "Firmware copy" "${ectool_output}"
}

_get_firmware_version() {
  local fw_type="${1}"
  local ectool_output
  ectool_output="$(run_ectool_cmd "version")"
  get_ectool_output_val "${fw_type} version" "${ectool_output}"
}

get_rw_firmware_version() {
  _get_firmware_version "RW"
}

get_ro_firmware_version() {
  _get_firmware_version "RO"
}

_get_rollback_info() {
  run_ectool_cmd "rollbackinfo"
}

get_rollback_block_id() {
  get_ectool_output_val "Rollback block id" "$(_get_rollback_info)"
}

get_rollback_min_version() {
  get_ectool_output_val "Rollback min version" "$(_get_rollback_info)"
}

get_rollback_rw_version() {
  get_ectool_output_val "RW rollback version" "$(_get_rollback_info)"
}

_check_rollback_matches() {
  local rb_type="${1}"
  local expected="${2}"
  local rb_info
  rb_info="$(get_rollback_${rb_type})"
  if [[ "${rb_info}" != "${expected}" ]]; then
    echo "Rollback ${rb_type} does not match, expected: ${expected}, actual: ${rb_info}"
    exit 1
  fi
}

check_rollback_block_id_matches() {
  _check_rollback_matches "block_id" "${1}"
}

check_rollback_min_version_matches() {
  _check_rollback_matches "min_version" "${1}"
}

check_rollback_rw_version_matches() {
  _check_rollback_matches "rw_version" "${1}"
}

check_is_rollback_set_to_initial_val() {
  check_rollback_block_id_matches "1"
  check_rollback_min_version_matches "0"
  check_rollback_rw_version_matches "0"
}

check_rollback_is_unset() {
  check_rollback_block_id_matches "0"
  check_rollback_min_version_matches "0"
  check_rollback_rw_version_matches "0"
}

check_file_exists() {
  if [[ ! -f "${1}" ]]; then
    echo "Cannot find file: ${1}"
    exit 1
  fi
}

check_running_rw_firmware() {
  local fw_copy
  fw_copy="$(get_running_firmware_copy)"
  if [[ "${fw_copy}" != "RW" ]]; then
    echo "Not running RW copy of firmware"
    exit 1
  fi
}

check_running_ro_firmware() {
  local fw_copy
  fw_copy="$(get_running_firmware_copy)"
  if [[ "${fw_copy}" != "RO" ]]; then
    echo "Not running RO copy of firmware"
    exit 1
  fi
}

_check_has_mp_firmware_type() {
  local fw_type="${1}"
  local fw_version
  fw_version="$(get_${fw_type}_firmware_version)"

  # The MP version string is not "special", so we compare against all the
  # "special" version strings and only succeed if it doesn't match any of them.
  for fw_name in ${_FW_NAMES}; do
    if [[ "${fw_version}" == *.${fw_name} ]]; then
      echo "Not running MP ${fw_type} firmware: ${fw_version}"
      exit 1
    fi
  done
}

check_has_mp_ro_firmware() {
  _check_has_mp_firmware_type "ro"
}

check_has_mp_rw_firmware() {
  _check_has_mp_firmware_type "rw"
}

# generate check_has_dev_rw_firmware/check_has_dev_ro_firmware, etc
for fw_name in ${_FW_NAMES}; do
  for fw_type in ${_FW_TYPES}; do
    eval "
      check_has_${fw_name}_${fw_type}_firmware() {
        local fw_version
        fw_version=\"\$(get_${fw_type}_firmware_version)\"
        if [[ \"\${fw_version}\" != *.${fw_name} ]]; then
          echo \"Not running ${fw_name} ${fw_type} firmware: \${fw_version}\"
          exit 1
        fi
      }
    "
  done
done

get_flashprotect_status() {
  run_ectool_cmd "flashprotect"
}

enable_sw_write_protect() {
  # TODO(b/116396469): The reboot_ec command returns an error even on success.
  run_ectool_cmd_ignoring_error "flashprotect" "enable"

  # TODO(b/116396469): "flashprotect enable" command is slow, so wait for
  # it to complete before attempting to reboot.
  sleep 2

  reboot_ec
}

disable_sw_write_protect() {
  run_ectool_cmd "flashprotect" "disable"
}

_get_hw_write_protect_state() {
  local output
  # NOTE: "wspw_cur" stands for "write protect switch current"
  output="$(crossystem wpsw_cur)"
  if [[ $? -ne 0 ]]; then
    echo "Error getting hardware write protect state"
    exit 1
  fi
  echo "${output}"
}

check_hw_write_protect_enabled() {
  local output
  output="$(_get_hw_write_protect_state)"
  if [[ "${output}" -ne 1 ]]; then
    echo "Expected HW write protect to be enabled, but it is not"
    exit 1
  fi
}

check_hw_write_protect_disabled() {
  local output
  output="$(_get_hw_write_protect_state)"
  echo "output: ${output}"
  if [[ "${output}" -ne 0 ]]; then
    echo "Expected HW write protect to be disabled, but it is not"
    exit 1
  fi
}

check_hw_and_sw_write_protect_enabled() {
  local output
  output="$(get_flashprotect_status)"

  if [[ "${output}" != "${_FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED}" ]]; then
    echo "Incorrect flashprotect state: ${output}"
    echo "Make sure HW write protect is enabled (wp_gpio_asserted)"
    exit 1
  fi
}

check_hw_and_sw_write_protect_enabled_ro() {
  local output
  output="$(get_flashprotect_status)"

  if [[ "${output}" != "${_FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_ENABLED_RO}" ]]; then
    echo "Incorrect flashprotect state: ${output}"
    echo "Make sure HW write protect is enabled (wp_gpio_asserted)"
    exit 1
  fi
}

check_hw_and_sw_write_protect_disabled() {
  local output
  output="$(get_flashprotect_status)"

  if [[ "${output}" != "${_FLASHPROTECT_OUTPUT_HW_AND_SW_WRITE_PROTECT_DISABLED}" ]]; then
    echo "Incorrect flashprotect state: ${output}"
    echo "Make sure HW write protect is disabled"
    exit 1
  fi
}

check_hw_write_protect_disabled_and_sw_write_protect_enabled() {
  local output
  output="$(get_flashprotect_status)"

  if [[ "${output}" != \
    "${_FLASHPROTECT_OUTPUT_HW_WRITE_PROTECT_DISABLED_AND_SW_WRITE_PROTECT_ENABLED}" ]]; then
    echo "Incorrect flashprotect state: ${output}"
    echo "Make sure HW write protect is disabled and SW write protect is enabled"
    exit 1
  fi
}

check_fingerprint_task_is_running() {
  run_ectool_cmd "fpinfo"
}

check_fingerprint_task_is_not_running() {
  if (check_fingerprint_task_is_running) ; then
    echo "Fingerprint task should not be running"
    exit 1
  fi
}

check_firmware_is_functional() {
  run_ectool_cmd "version"
}

check_firmware_is_not_functional() {
  if (check_firmware_is_functional); then
    echo "Firmware should not be responding to commands"
    exit 1
  fi
}

check_files_match() {
  cmp $1 $2
  if [[ $? -ne 0 ]]; then
    echo "Expected files to match, but they do not"
    exit 1
  fi
}

check_files_do_not_match() {
  if (check_files_match); then
    echo "Expected files to not match, but they do"
    exit 1
  fi
}

get_file_size() {
  stat --printf %s "${1}"
}

check_file_size_equals_zero() {
  local file_size="$(get_file_size ${1})"
  if [[ "${file_size}" -ne 0 ]]; then
    echo "File is not empty"
    exit 1
  fi
}

check_file_contains_all_0xFF_bytes() {
  local tmp_file="all_0xff.bin"
  local file_to_compare="$1"
  local file_expected_byte_size="$2"
  # create file full of zeros and then replace with 0xFF
  dd if='/dev/zero' bs=1 count="${file_expected_byte_size}" | \
    sed 's#\x00#\xFF#g' > "${tmp_file}"

  check_files_match "${file_to_compare}" "${tmp_file}"

  rm -rf "${tmp_file}"
}

check_system_is_locked() {
  local flags
  flags="$(get_sysinfo_flags)"
  if [[ "${flags}" != "${_SYSINFO_SYSTEM_IS_LOCKED_FLAGS}" ]]; then
    echo "sysinfo flags do not match. expected: "\
         "${_SYSINFO_SYSTEM_IS_LOCKED_FLAGS}, actual: ${flags}"
    exit 1
  fi
}