#!/usr/bin/env bash
# Copyright (C) 2012-2017 VLC authors and VideoLAN
# Copyright (C) 2012-2014 Felix Paul Kühne <fkuehne at videolan dot org>
# Copyright (C) 2018-2020 Damiano Galassi <damiog@gmail.com>
# Copyright (C) 2018-2020 Bradley Sepos <bradley@bradleysepos.com>
#
# Based on VLC's codesign.sh
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.

NAME="hbsign"

set -e
set -u

SELF="${0}"
SELF_NAME=$(basename "${SELF}")
HELP="\
usage: ${SELF_NAME} [-hrs]
       ${SELF_NAME} identity application [application2 ...]
where:
   -h  display this help text
   -r  enable runtime hardening
   -s  enable sandbox
"

# Logs error message and exits
function exit_with_error {
    set +e
    ERROR="${2}"
    echo "${SELF_NAME}: ${ERROR}" >&2
    PRINT_HELP="${3:-false}"
    if [[ "${PRINT_HELP}" == true ]]; then
        echo -e "${HELP}"
    fi
    exit "${1}"
}

LOG="${NAME}.log"
touch "${LOG}" || exit_with_error 1 "${SELF_NAME}: unable to create log file ${LOG}"

OPTIND=1
RUNTIME=false
SANDBOX=false
while getopts ":hrs" OPT; do
    case "${OPT}" in
        h)
            # Print help and exit
            echo -e "${HELP}"
            exit 0
            ;;
        r)
            RUNTIME=true
            ;;
        s)
            SANDBOX=true
            ;;
        :)
            # Option without required argument
            exit_with_error 1 "${SELF_NAME}: option -${OPTARG} requires a value" true
            ;;
        \?)
            # Invalid option specified
            exit_with_error 1 "${SELF_NAME}: invalid option: -${OPTARG}" true
            ;;
    esac
done
shift $((${OPTIND} - 1))
IDENTITY="${1:-}"
if [[ "${IDENTITY}" == '' ]]; then
    exit_with_error 1 "${SELF_NAME}: identity not specified" true
fi
shift 1

if [[ ${#@} -eq 0 ]]; then
    exit_with_error 1 "${SELF_NAME}: application not specified" true
fi

SCRIPTDIR=$(dirname "${SELF}")


RUNTIME_FLAGS=""
if [[ "${RUNTIME}" == true ]]; then
    RUNTIME_FLAGS="--options=runtime"
fi

ENTITLEMENTS_MAIN_FLAGS=""
ENTITLEMENTS_XPC_FLAGS=""
ENTITLEMENTS_CLI_FLAGS=""

if [[ "${SANDBOX}" == true ]]; then
    ENTITLEMENTS_MAIN_FLAGS="--entitlements $SCRIPTDIR/HandBrake.entitlements"
    ENTITLEMENTS_XPC_FLAGS="--entitlements $SCRIPTDIR/HandBrakeXPCService/HandBrakeXPCService.entitlements"
    ENTITLEMENTS_CLI_FLAGS="--entitlements $SCRIPTDIR/HandBrakeXPCService/HandBrakeXPCService-RuntimeOnly.entitlements"
elif [[ "${RUNTIME}" == true ]]; then
    ENTITLEMENTS_MAIN_FLAGS="--entitlements $SCRIPTDIR/HandBrake-RuntimeOnly.entitlements"
    ENTITLEMENTS_XPC_FLAGS="--entitlements $SCRIPTDIR/HandBrakeXPCService/HandBrakeXPCService-RuntimeOnly.entitlements"
    ENTITLEMENTS_CLI_FLAGS="${ENTITLEMENTS_XPC_FLAGS}"
fi

function sign {  # sign flags target
    local TARGET FLAGS ERR
    TARGET="${2:-}"
    if [[ "${TARGET}" == "" ]]; then
        ERR="${SELF_NAME}: target not specified to sign function\ncommand was: sign ${1:-} ${2:-}"
        echo -e "${ERR}" >> "${LOG}"
        exit_with_error 1 "${ERR}"
    fi

    FLAGS="${1:-}"
    if [[ "${FLAGS}" == "main" ]]; then
        codesign --force --verbose $RUNTIME_FLAGS $ENTITLEMENTS_MAIN_FLAGS -s "${IDENTITY}" "${2:-}" >>"${LOG}" 2>&1 || exit_with_error 1 "Signing failed. More info may be available in ${LOG}"
    elif [[ "${FLAGS}" == "xpc" ]]; then
        codesign --force --verbose $RUNTIME_FLAGS $ENTITLEMENTS_XPC_FLAGS -s "${IDENTITY}" "${2:-}" >>"${LOG}" 2>&1 || exit_with_error 1 "Signing failed. More info may be available in ${LOG}"
    elif [[ "${FLAGS}" == "cli" ]]; then
        codesign --force --verbose $RUNTIME_FLAGS $ENTITLEMENTS_CLI_FLAGS --prefix fr.handbrake. -s "${IDENTITY}" "${2:-}" >>"${LOG}" 2>&1 || exit_with_error 1 "Signing failed. More info may be available in ${LOG}"
    else
        codesign --force --verbose $RUNTIME_FLAGS -s "${IDENTITY}" "${2:-}" >>"${LOG}" 2>&1 || exit_with_error 1 "Signing failed. More info may be available in ${LOG}"
    fi
}

echo "Script dir: ${SCRIPTDIR}"
echo "Identity: ${IDENTITY}"
echo "Hardened runtime: ${RUNTIME}"
echo "Sandbox: ${SANDBOX}"

for TARGET in "${@}"; do

    TARGET="${TARGET#./}"
    echo "${TARGET}:"

    if [[ "${TARGET##*/}" == 'HandBrake.app' ]]; then
        echo "  Signing Frameworks"
        find "${TARGET}"/Contents/Frameworks -type f -name ".DS_Store" -exec rm '{}' \; >/dev/null 2>&1
        find "${TARGET}"/Contents/Frameworks -type f -name "*.textile" -exec rm '{}' \; >/dev/null 2>&1
        find "${TARGET}"/Contents/Frameworks -type f -name "*.txt" -exec rm '{}' \; >/dev/null 2>&1
        sign "default" "${TARGET}"/Contents/Frameworks/HandBrakeKit.framework/Versions/A
        sign "default" "${TARGET}"/Contents/Frameworks/Sparkle.framework/Resources/Autoupdate
        sign "default" "${TARGET}"/Contents/Frameworks/Sparkle.framework/Resources/Updater.app
        sign "default" "${TARGET}"/Contents/Frameworks/Sparkle.framework/Versions/A
        for FILE in $(find "${TARGET}"/Contents/Frameworks -type f -name "*.h" -o -name "*.nib" -o -name "*.plist" -o -name "*.strings" -exec echo {} \; >/dev/null 2>&1)
        do
            sign "default" "${FILE}"
        done

        echo "  Signing Headers"
        for FILE in $(find "${TARGET}"/Contents/MacOS/include -type f -exec echo {} \; >/dev/null 2>&1)
        do
            sign "default" "${FILE}"
        done

        echo "  Signing XPC Services"
        sign "xpc"     "${TARGET}"/Contents/XPCServices/HandBrakeXPCService.xpc
        sign "default" "${TARGET}"/Contents/XPCServices/org.sparkle-project.Downloader.xpc
        sign "default" "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerConnection.xpc
        sign "default" "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerLauncher.xpc
        sign "default" "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerStatus.xpc
    fi

    echo "  Signing Executable"
    if [[ "${TARGET##*/}" == 'HandBrakeCLI' ]]; then
        sign "cli" "${TARGET}"
    else
        sign "main" "${TARGET}"
    fi

    if [[ "${TARGET##*/}" == 'HandBrake.app' ]]; then
        echo "  Validating Frameworks"
        codesign --verify -vv "${TARGET}"/Contents/Frameworks/HandBrakeKit.framework >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
        codesign --verify -vv "${TARGET}"/Contents/Frameworks/Sparkle.framework >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"

        echo "  Validating Updater.app"
        codesign --verify -vv "${TARGET}"/Contents/Frameworks/Sparkle.framework/Versions/Current/Resources/Updater.app >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"

        echo "  Validating XPC Services"
        codesign --verify -vv "${TARGET}"/Contents/XPCServices/HandBrakeXPCService.xpc >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
        codesign --verify -vv "${TARGET}"/Contents/XPCServices/org.sparkle-project.Downloader.xpc >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
        codesign --verify -vv "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerConnection.xpc >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
        codesign --verify -vv "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerLauncher.xpc >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
        codesign --verify -vv "${TARGET}"/Contents/XPCServices/org.sparkle-project.InstallerStatus.xpc >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
    fi

    echo "  Validating Bundle"
    codesign --verify --deep --strict --verbose=4 "${TARGET}" >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"

    if [[ "${TARGET##*/}" != 'HandBrakeCLI' ]]; then
        echo "  Validating Execution Privileges"
        spctl -a -t exec -vv "${TARGET}" >>"${LOG}" 2>&1 || exit_with_error 1 "Validation failed. More info may be available in ${LOG}"
    fi

done

echo "Complete."
exit 0