i2p-browser

#!/bin/sh

set -e

# This isn't very useful without I2P...
grep -qw "i2p" /proc/cmdline || exit 0

CMD=$(basename ${0})
LOCK=/var/lock/${CMD}

. gettext.sh
TEXTDOMAIN="tails"
export TEXTDOMAIN

. /usr/local/lib/tails-shell-library/i2p.sh

CONF_DIR=/var/lib/i2p-browser
COW=${CONF_DIR}/cow
CHROOT=${CONF_DIR}/chroot
BROWSER_USER=i2pbrowser
TBB_PREFS="/etc/tor-browser/profile/preferences"
START_PAGE="http://127.0.0.1:7657"

# Import the TBB_INSTALL, TBB_EXT and TBB_PROFILE variables, and
# exec_firefox(), configure_xulrunner_app_locale() and
# guess_best_tor_browser_locale()
. /usr/local/lib/tails-shell-library/tor-browser.sh

# Import windows_camouflage_is_enabled()
. /usr/local/lib/tails-shell-library/tor-browser.sh

. /usr/local/lib/tails-shell-library/chroot-browser.sh

NOSCRIPT_EXT_XPI="${TBB_EXT}/{73a6fe31-595d-460b-a920-fcc0f8843232}.xpi"
TORBUTTON_EXT_DIR="${TBB_EXT}/torbutton@torproject.org"
NAME="`gettext \"I2P Browser\"`"

cleanup () {
    try_cleanup_browser_chroot ${CHROOT} ${COW} ${BROWSER_USER}
}

error () {
    local cli_text="${CMD}: `gettext \"error:\"` ${@}"
    local dialog_text="<b><big>`gettext \"Error\"`</big></b>

${@}"
    echo "${cli_text}" >&2
    sudo -u ${SUDO_USER} zenity --error --title "" --text "${dialog_text}"
    exit 1
}

verify_start () {
    # Make sure the user really wants to start the browser in case the router console isn't available
    local dialog_msg="<b><big>`gettext \"Do you still want to launch I2P Browser?\"`</big></b>

`gettext \"The I2P router console is not ready.\"`"
    local launch="`gettext \"_Launch\"`"
    local exit="`gettext \"_Exit\"`"
    # Since zenity can't set the default button to cancel, we switch the
    # labels and interpret the return value as its negation.
    if sudo -u ${SUDO_USER} zenity --question --title "" --ok-label "${exit}" \
       --cancel-label "${launch}" --text "${dialog_msg}"; then
        exit 0
    fi
}

show_start_notification () {
    local title="`gettext \"Starting the I2P Browser...\"`"
    local body="`gettext \"This may take a while, so please be patient.\"`"
    tails-notify-user "${title}" "${body}" 10000
}

configure_chroot () {
    # Prevent sudo from complaining about failing to resolve the 'amnesia' host
    echo "127.0.0.1 localhost amnesia" > ${CHROOT}/etc/hosts

    # Create a fresh Tor Browser profile for the i2pbrowser user
    BROWSER_CONF="${CHROOT}/home/${BROWSER_USER}/.tor-browser"
    BROWSER_PROFILE="${BROWSER_CONF}/profile.default"
    BROWSER_EXT="${BROWSER_PROFILE}/extensions"
    mkdir -p "${BROWSER_EXT}"
    ln -s "${NOSCRIPT_EXT_XPI}" "${BROWSER_EXT}"
    ln -s "${TORBUTTON_EXT_DIR}" "${BROWSER_EXT}"
    for LANGPACK in $(ls ${TBB_PROFILE}/extensions/langpack-*.xpi); do
        ln -s "${LANGPACK}" "${BROWSER_EXT}"
    done

    BROWSER_PREF_DIR="${BROWSER_PROFILE}/preferences"
    BROWSER_PREFS="${BROWSER_PREF_DIR}/prefs.js"
    mkdir -p "${BROWSER_PREF_DIR}"

    # Selectively copy the TBB prefs we want
    sed '/\(security\|update\|download\|spell\|noscript\|torbrowser\|torbutton\)/!d' $TBB_PREFS/0000tails.js > \
                    ${BROWSER_PREF_DIR}/0000tails.js
    sed '/\(capability\|noscript\|torbutton\)/!d' ${TBB_PREFS}/extension-overrides.js > \
                    ${BROWSER_PREF_DIR}/extension-overrides.js

    # Localization
    BEST_LOCALE="$(guess_best_tor_browser_locale)"
    configure_xulrunner_app_locale "${BROWSER_PROFILE}" "${BEST_LOCALE}"

    # Set the name (e.g. window title) of the browser
    set_chroot_torbutton_browser_name "${CHROOT}" "${NAME}" "${BEST_LOCALE}"

    # Set start page to the router console
    echo 'user_pref("browser.startup.homepage", "'${START_PAGE}'");' >> \
        ${BROWSER_PREFS}

    # add the I2P proxy to all protocols
    cp /usr/share/tails/i2p-browser/prefs.js "${BROWSER_PREF_DIR}"

    # Hide options in the I2P Browser.
    # It would be good to implement the ability to persist the browser profile in the
    # future. At that point, the Bookmark functionality could be restored.
    BROWSER_CHROME="${BROWSER_PROFILE}/chrome/userChrome.css"
    mkdir -p "$(dirname "${BROWSER_CHROME}")"
    cp /usr/share/tails/i2p-browser/userChrome.css ${BROWSER_CHROME}

    # Remove all bookmarks
    rm -f "${CHROOT}/${TBB_PROFILE}/bookmarks.html"
    rm -f ${BROWSER_PROFILE}/bookmarks.html
    rm -f ${BROWSER_PROFILE}/places.sqlite

    chown -R ${BROWSER_USER}:${BROWSER_USER} "${BROWSER_CONF}"

    # Change the theme when not using Windows camouflage
    if ! windows_camouflage_is_enabled; then
        cat /usr/share/tails/i2p-browser/theme.js >> "${BROWSER_PREFS}"
    else
        # The camouflage activation script requires a dbus server for
        # properly configuring GNOME, so we start one in the chroot
        chroot ${CHROOT} sudo -H -u ${BROWSER_USER} sh -c 'eval `dbus-launch --auto-syntax`; tails-activate-win8-theme' || :
    fi

}

show_shutdown_notification () {
    local title="`gettext \"Shutting down the I2P Browser...\"`"
    local body="`gettext \"This may take a while, and you may not restart the I2P Browser until it is properly shut down.\"`"
    tails-notify-user "${title}" "${body}" 10000
}

# Prevent multiple instances of the script.
exec 9>${LOCK}
if ! flock -x -n 9; then
    error "`gettext \"Another I2P Browser is currently running, or being cleaned up. Please retry in a while.\"`"
fi

if ! i2p_router_console_is_ready; then
    verify_start
fi
show_start_notification
echo "* Setting up chroot"
setup_browser_chroot ${CHROOT} ${COW} || \
    error "`gettext \"Failed to setup chroot.\"`"
echo "* Configuring chroot"
configure_chroot
echo "* Starting I2P Browser"
run_chroot_browser ${CHROOT} ${BROWSER_USER} ${SUDO_USER}
show_shutdown_notification

exit 0