#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Tahow-LAFS data storage grid implemented via Tor
# https://k0rx.com/blog/2017/01/lafs.html
# http://tahoe-lafs.readthedocs.io/en/latest/anonymity-configuration.html
#
# License
# =======
#
# Copyright (C) 2014-2018 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

VARIANTS='full full-vim cloud'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1
SHOW_ICANN_ADDRESS_ON_ABOUT=0

TAHOELAFS_PORT=50213
TAHOELAFS_STORAGE_PORT=50214
TAHOELAFS_ONION_PORT=8096
TAHOELAFS_STORAGE_ONION_PORT=8097

TAHOE_DIR=/home/tahoelafs
TAHOE_COMMAND='/usr/bin/tahoe'
tahoelafs_storage_file=$TAHOE_DIR/client/private/servers.yaml

TAHOELAFS_SHARES_NEEDED=3
TAHOELAFS_SHARES_HAPPY=7
TAHOELAFS_SHARES_TOTAL=10

tahoelafs_variables=(ONION_ONLY
                     MY_USERNAME
                     TAHOELAFS_PORT
                     TAHOELAFS_SHARES_NEEDED
                     TAHOELAFS_SHARES_HAPPY
                     TAHOELAFS_SHARES_TOTAL)

function logging_on_tahoelafs {
    echo -n ''
}

function logging_off_tahoelafs {
    echo -n ''
}

function add_user_tahoelafs {
    if [[ $(app_is_installed tahoelafs) == "0" ]]; then
        echo '0'
        return
    fi

    new_username="$1"
    new_user_password="$2"
    "${PROJECT_NAME}-pass" -u "$new_username" -a tahoelafs -p "$new_user_password"
    if grep -q "${new_username}:" /etc/nginx/.htpasswd-tahoelafs; then
        sed -i "'/${new_username}:/d" /etc/nginx/.htpasswd-tahoelafs
    fi
    echo "${new_user_password}" | htpasswd -i -s /etc/nginx/.htpasswd-tahoelafs "${new_username}"
    echo '0'
}

function remove_user_tahoelafs {
    remove_username="$1"
    "${PROJECT_NAME}-pass" -u "$remove_username" --rmapp tahoelafs
    if grep -q "${remove_username}:" /etc/nginx/.htpasswd-tahoelafs; then
        sed -i "/${remove_username}:/d" /etc/nginx/.htpasswd-tahoelafs
    fi
}

function change_password_tahoelafs {
    change_username="$1"
    change_password="$2"
    "${PROJECT_NAME}-pass" -u "$change_username" -a tahoelafs -p "$change_password"
    if grep -q "${change_username}:" /etc/nginx/.htpasswd-tahoelafs; then
        sed -i "/tahoe-${change_username}:/d" /etc/nginx/.htpasswd-tahoelafs
    fi
    echo "${change_password}" | htpasswd -i -s /etc/nginx/.htpasswd-tahoelafs "${change_username}"
}

function add_tahoelafs_storage_node_interactive {
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone Configuration" \
           --title $"Add Tahoe-LAFS storage node" \
           --form $"\\nEnter the storage node details which can be found on the About screen of another server" 13 75 5 \
           $"Hostname:" 1 1 "" 1 14 53 40 \
           $"Public Key:" 2 1 "" 2 14 53 255 \
           $"Nickname:" 3 1 "" 3 14 53 255 \
           $"FURL:" 4 1 "" 4 14 53 255 \
           2> "$data"
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    storage_hostname=$(sed -n 1p < "$data")
    public_key=$(sed -n 2p < "$data")
    nick=$(sed -n 3p < "$data")
    furl=$(sed -n 4p < "$data")
    rm -f "$data"

    if [ ${#public_key} -eq 0 ]; then
        return
    fi

    add_tahoelafs_server "${storage_hostname}" "${public_key}" "${nick}" "${furl}"

    if grep -q "$public_key" ${tahoelafs_storage_file}; then
        dialog --title $"Add Tahoe-LAFS storage node" \
               --msgbox $"Storage node added" 6 40
    fi
}

function edit_tahoelafs_nodes {
    editor $tahoelafs_storage_file
    chown tahoelafs:debian-tor $tahoelafs_storage_file
    systemctl restart tahoelafs-client
}

function edit_tahoelafs_shares {
    read_config_param TAHOELAFS_SHARES_NEEDED
    read_config_param TAHOELAFS_SHARES_HAPPY
    read_config_param TAHOELAFS_SHARES_TOTAL

    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone Configuration" \
           --title $"Tahoe-LAFS shares" \
           --form $"\\nEnter the storage node details which can be found on the About screen of another server" 13 40 3 \
           $"Needed:" 1 1 "${TAHOELAFS_SHARES_NEEDED}" 1 14 4 4 \
           $"Happy:" 2 1 "${TAHOELAFS_SHARES_HAPPY}" 2 14 4 4 \
           $"Total:" 3 1 "${TAHOELAFS_SHARES_TOTAL}" 3 14 4 4 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    tl_needed=$(sed -n 1p < "$data")
    tl_happy=$(sed -n 2p < "$data")
    tl_total=$(sed -n 3p < "$data")
    rm -f "$data"

    if [ ${#tl_needed} -gt 0 ]; then
        TAHOELAFS_SHARES_NEEDED=${tl_needed}
    fi
    if [ ${#tl_happy} -gt 0 ]; then
        TAHOELAFS_SHARES_HAPPY=${tl_happy}
    fi
    if [ ${#tl_total} -gt 0 ]; then
        TAHOELAFS_SHARES_TOTAL=${tl_total}
    fi

    sed -i "s|shares.needed.*|shares.needed = ${TAHOELAFS_SHARES_NEEDED}|g" $TAHOE_DIR/tahoelafs/client/tahoe.cfg
    sed -i "s|shares.happy.*|shares.happy = ${TAHOELAFS_SHARES_HAPPY}|g" $TAHOE_DIR/tahoelafs/client/tahoe.cfg
    sed -i "s|shares.total.*|shares.total = ${TAHOELAFS_SHARES_TOTAL}|g" $TAHOE_DIR/tahoelafs/client/tahoe.cfg

    sed -i "s|shares.needed.*|shares.needed = ${TAHOELAFS_SHARES_NEEDED}|g" $TAHOE_DIR/tahoelafs/storage/tahoe.cfg
    sed -i "s|shares.happy.*|shares.happy = ${TAHOELAFS_SHARES_HAPPY}|g" $TAHOE_DIR/tahoelafs/storage/tahoe.cfg
    sed -i "s|shares.total.*|shares.total = ${TAHOELAFS_SHARES_TOTAL}|g" $TAHOE_DIR/tahoelafs/storage/tahoe.cfg

    systemctl restart tahoelafs-storage
    systemctl restart tahoelafs-client

    dialog --title $"Tahoe-LAFS shares" \
           --msgbox $"Shares settings changed" 6 40
}

function configure_interactive_tahoelafs {
    W=(1 $"Add a storage node"
       2 $"Manually edit storage nodes"
       3 $"Shares settings")

    while true
    do
        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Tahoe-LAFS" --menu $"Choose an operation, or ESC to exit:" 12 60 3 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi

        case $selection in
            1) add_tahoelafs_storage_node_interactive;;
            2) edit_tahoelafs_nodes;;
            3) edit_tahoelafs_shares;;
        esac
    done
}

function tahoelafs_setup_client_config {
    config_file="$1"
    nick="$2"

    { echo '[node]';
      echo "nickname = $nick";
      echo 'reveal-IP-address = false';
      echo "web.port = tcp:${TAHOELAFS_PORT}:interface=127.0.0.1";
      echo 'web.static = public_html';
      echo 'tub.port = disabled';
      echo 'tub.location = disabled';
      echo '';
      echo '[client]';
      echo 'introducer.furl =';
      echo "shares.needed = ${TAHOELAFS_SHARES_NEEDED}";
      echo "shares.happy = ${TAHOELAFS_SHARES_HAPPY}";
      echo "shares.total = ${TAHOELAFS_SHARES_TOTAL}";
      echo '';
      echo '[storage]';
      echo 'enabled = false';
      echo 'reserved_space = 3G';
      echo '';
      echo '[helper]';
      echo 'enabled = false';
      echo '';
      echo '[connections]';
      echo 'tcp = tor'; } > "$config_file"
}

function tahoelafs_setup_storage_config {
    config_file="$1"
    nick="$2"

    { echo '[node]';
      echo "nickname = $nick";
      echo 'reveal-IP-address = false';
      echo 'web.port =';
      echo 'web.static = public_html';
      echo "tub.port = tcp:${TAHOELAFS_STORAGE_ONION_PORT}:interface=127.0.0.1";
      echo "tub.location = tor:${TAHOELAFS_STORAGE_ONION_HOSTNAME}:${TAHOELAFS_STORAGE_PORT}";
      echo '';
      echo '[client]';
      echo 'introducer.furl =';
      echo 'helper.furl =';
      echo '';
      echo "shares.needed = ${TAHOELAFS_SHARES_NEEDED}";
      echo "shares.happy = ${TAHOELAFS_SHARES_HAPPY}";
      echo "shares.total = ${TAHOELAFS_SHARES_TOTAL}";
      echo '';
      echo '[storage]';
      echo 'enabled = true';
      echo 'reserved_space = 3G';
      echo 'expire.enabled = true';
      echo 'expire.mode = age';
      echo 'expire.override_lease_duration = 3 months';
      echo '';
      echo '[helper]';
      echo 'enabled = false';
      echo '';
      echo '[connections]';
      echo 'tcp = tor'; } > "$config_file"

    chown -R tahoelafs:debian-tor $TAHOE_DIR
}

function install_interactive_tahoelafs {
    echo -n ''
    APP_INSTALLED=1
}

function upgrade_tahoelafs {
    echo -n ''
}

function backup_local_tahoelafs {
    source_directory=$TAHOE_DIR
    if [ ! -d $source_directory ]; then
        return
    fi
    systemctl stop tahoelafs
    dest_directory=tahoelafs
    function_check backup_directory_to_usb
    backup_directory_to_usb $source_directory $dest_directory
    systemctl start tahoelafs
}

function restore_local_tahoelafs {
    echo $"Restoring Tahoe-LAFS"
    systemctl stop tahoelafs-storage
    systemctl stop tahoelafs-client
    temp_restore_dir=/root/temptahoelafs
    restore_directory_from_usb $temp_restore_dir tahoelafs
    if [ -d $temp_restore_dir$TAHOE_DIR ]; then
        mv $TAHOE_DIR ${TAHOE_DIR}-old
        cp -r $temp_restore_dir$TAHOE_DIR $TAHOE_DIR
    else
        cp -r $temp_restore_dir/* $TAHOE_DIR/
    fi
    # shellcheck disable=SC2181
    if [ ! "$?" = "0" ]; then
        if [ -d ${TAHOE_DIR}-old ]; then
            mv ${TAHOE_DIR}-old $TAHOE_DIR
        fi
        exit 246833
    fi
    if [ -d ${TAHOE_DIR}-old ]; then
        rm -rf ${TAHOE_DIR}-old
    fi
    rm -rf $temp_restore_dir
    chown -R tahoelafs:debian-tor $TAHOE_DIR
    systemctl start tahoelafs-client
    systemctl start tahoelafs-storage
    echo $"Restore complete"
}

function backup_remote_tahoelafs {
    source_directory=$TAHOE_DIR
    if [ ! -d $source_directory ]; then
        return
    fi
    systemctl stop tahoelafs-storage
    systemctl stop tahoelafs-client
    dest_directory=tahoelafs
    function_check backup_directory_to_usb
    backup_directory_to_friend $source_directory $dest_directory
    systemctl start tahoelafs-client
    systemctl start tahoelafs-storage
}

function restore_remote_tahoelafs {
    echo $"Restoring Tahoe-LAFS"
    systemctl stop tahoelafs-storage
    systemctl stop tahoelafs-client
    temp_restore_dir=/root/temptahoelafs
    restore_directory_from_friend $temp_restore_dir tahoelafs
    if [ -d $temp_restore_dir$TAHOE_DIR ]; then
        mv $TAHOE_DIR ${TAHOE_DIR}-old
        cp -r $temp_restore_dir$TAHOE_DIR $TAHOE_DIR
    else
        cp -r $temp_restore_dir/* $TAHOE_DIR/
    fi
    # shellcheck disable=SC2181
    if [ ! "$?" = "0" ]; then
        if [ -d "${TAHOE_DIR}-old" ]; then
            # shellcheck disable=SC2086
            mv ${TAHOE_DIR}-old $TAHOE_DIR
        fi
        exit 623925
    fi
    if [ -d "${TAHOE_DIR}-old" ]; then
        rm -rf "${TAHOE_DIR}-old"
    fi
    rm -rf $temp_restore_dir
    chown -R tahoelafs:debian-tor $TAHOE_DIR
    systemctl start tahoelafs-client
    systemctl start tahoelafs-storage
    echo $"Restore complete"
}

function reconfigure_tahoelafs {
    if [ -f $tahoelafs_storage_file ]; then
        rm $tahoelafs_storage_file
    fi
    sed -i '/HidServAuth /d' /etc/tor/torrc
}

function remove_tahoelafs {
    if [ -f /etc/nginx/sites-available/tahoelafs ]; then
        nginx_dissite tahoelafs
        rm /etc/nginx/sites-available/tahoelafs
        if [ -d /var/www/tahoelafs ]; then
            rm -rf /var/www/tahoelafs
        fi
        systemctl reload nginx
    fi

    systemctl stop tahoelafs-storage
    systemctl disable tahoelafs-storage
    rm /etc/systemd/system/tahoelafs-storage.service
    systemctl daemon-reload

    systemctl stop tahoelafs-client
    systemctl disable tahoelafs-client
    rm /etc/systemd/system/tahoelafs-client.service
    systemctl daemon-reload

    pip uninstall tahoe-lafs[tor]
    apt-get -yq remove tahoe-lafs

    if [ -d /var/lib/tahoelafs ]; then
        rm -rf /var/lib/tahoelafs
    fi
    remove_completion_param install_tahoelafs
    function_check remove_onion_service
    remove_onion_service tahoelafs ${TAHOELAFS_ONION_PORT}
    remove_onion_service storage-tahoelafs ${TAHOELAFS_STORAGE_ONION_PORT} "$(get_tahoelafs_nick)"
    sed -i '/HidServAuth /d' /etc/tor/torrc

    groupdel -f tahoelafs
    userdel -r tahoelafs

    if [ -d $TAHOE_DIR ]; then
        rm -rf $TAHOE_DIR
    fi
    remove_app tahoelafs
    if [ -f /etc/nginx/.htpasswd-tahoelafs ]; then
        rm /etc/nginx/.htpasswd-tahoelafs
    fi
    onion_update
}

function create_tahoelafs_stealth_node {
    node_dir="$1"
    client_dir="$2"
    node_nick="$3"
    client_nick="$4"

    if [ ${#node_dir} -eq 0 ]; then
        echo $'No tahoe-LAFS storage node directory given'
        exit 783522
    fi
    if [ ${#client_dir} -eq 0 ]; then
        echo $'No tahoe-LAFS client directory given'
        exit 368935
    fi
    if [ ${#node_nick} -eq 0 ]; then
        echo $'No tahoe-LAFS node nick given'
        exit 672351
    fi
    if [ ${#client_nick} -eq 0 ]; then
        echo $'No tahoe-LAFS client nick given'
        exit 682362
    fi

    if [ ! -f "${node_dir}/tahoe.cfg" ]; then
        su -c "mkdir ${node_dir}" - tahoelafs
        su -c "$TAHOE_COMMAND create-node -C ${node_dir} --hostname=fixme" - tahoelafs
        tahoelafs_setup_storage_config "${node_dir}/tahoe.cfg" "${node_nick}"
    fi

    if [ ! -f "${client_dir}/tahoe.cfg" ]; then
        su -c "mkdir ${client_dir}" - tahoelafs
        su -c "$TAHOE_COMMAND create-client -C ${client_dir}" - tahoelafs
        tahoelafs_setup_client_config "${client_dir}/tahoe.cfg" "${client_nick}"
    fi
}

function create_tahoelafs_introducer {
    introducer_dir="$1"

    if [ -f "${introducer_dir}/tahoe.cfg" ]; then
        return
    fi

    su -c "mkdir ${introducer_dir}" - tahoelafs
    su -c "$TAHOE_COMMAND create-introducer -C ${introducer_dir} --hide-ip --hostname=127.0.0.1" - tahoelafs
}

function create_tahoelafs_storage_node {
    # Nodes can store data
    node_dir="$1"
    furl="$2"

    if [ ${#furl} -eq 0 ]; then
        return
    fi

    if [ -f "${node_dir}/tahoe.cfg" ]; then
        return
    fi

    su -c "mkdir ${node_dir}" - tahoelafs
    su -c "$TAHOE_COMMAND create-node -C ${node_dir} --introducer=\"$furl\" --listen=tor --hide-ip" - tahoelafs
}

function create_tahoelafs_client {
    # Clients have no storage
    client_dir="$1"
    furl="$2"

    if [ ${#furl} -eq 0 ]; then
        return
    fi

    if [ -f "${client_dir}/tahoe.cfg" ]; then
        return
    fi

    su -c "mkdir ${client_dir}" - tahoelafs
    su -c "$TAHOE_COMMAND create-client -C ${client_dir} --introducer=\"$furl\" --listen=tor --hide-ip --hostname=127.0.0.1" - tahoelafs
    sed -i 's|reveal-IP-address =.*|reveal-IP-address = False|g' "$client_dir/tahoe.cfg"
    sed -i 's|tub.port =.*|tub.port = disabled|g' "$client_dir/tahoe.cfg"
    sed -i 's|tub.location =.*|tub.location = disabled|g' "$client_dir/tahoe.cfg"
}

function get_tahoelafs_furl {
    furl=$(cat $TAHOE_DIR/storage/private/storage.furl)
    furl_1=$(echo "${furl}" | awk -F ' ' '{print $1}')
    furl_2=$(echo "${furl}" | awk -F ':' '{print $5}')
    echo "${furl_1}:${furl_2}"
}

function get_tahoelafs_nick {
    echo "${MY_USERNAME}-node"
}

function get_tahoelafs_storage_hostname {
    cat /var/lib/tor/hidden_service_storage-tahoelafs/hostname
}

function get_tahoelafs_public_key {
    grep 'v0-' "$TAHOE_DIR/storage/node.pubkey" | sed 's|pub-||g'
}

function add_tahoelafs_server {
    storage_hostname="$1"
    public_key="$2"
    nick="$3"
    furl="$4"

    if [ ${#storage_hostname} -eq 0 ]; then
        echo $'No storage hostname'
        return
    fi
    if [ ${#public_key} -eq 0 ]; then
        echo $'No public key'
        return
    fi
    if [ ${#nick} -eq 0 ]; then
        echo $'No nick'
        return
    fi
    if [ ${#furl} -eq 0 ]; then
        echo $'No furl'
        return
    fi

    if [ ! -f ${tahoelafs_storage_file} ]; then
        echo 'storage:' > ${tahoelafs_storage_file}
    else
        if grep -q "${public_key}" ${tahoelafs_storage_file}; then
            echo $'Public key already exists'
            return
        fi
        echo '# storage' >> ${tahoelafs_storage_file}
    fi
    { echo "  ${public_key}:";
      echo "    ann:";
      echo "      nickname: ${nick}";
      echo "      anonymous-storage-FURL: ${furl}"; } >> "${tahoelafs_storage_file}"
    chown tahoelafs:debian-tor ${tahoelafs_storage_file}

    if ! grep -q "HidServAuth ${storage_hostname}" /etc/tor/torrc; then
        echo "HidServAuth ${storage_hostname}" >> /etc/tor/torrc
    fi
}

function create_tahoelafs_daemon {
    daemon_name=$1

    TAHOELAFS_DAEMON_FILE=/etc/systemd/system/tahoelafs-${daemon_name}.service
    echo "Creating daemon: $TAHOELAFS_DAEMON_FILE"

    { echo '[Unit]';
      echo "Description=Tahoe-LAFS ${daemon_name}";
      echo 'After=syslog.target';
      echo 'After=network.target';
      echo '';
      echo '[Service]';
      echo 'Type=simple';
      echo "User=tahoelafs";
      echo "Group=debian-tor";
      echo "WorkingDirectory=${TAHOE_DIR}";
      echo "ExecStart=/usr/bin/tahoe run ${TAHOE_DIR}/${daemon_name}";
      echo "ExecStop=/usr/bin/tahoe stop ${TAHOE_DIR}/${daemon_name}";
      echo 'Restart=on-failure';
      echo 'RestartSec=10';
      echo "Environment=\"USER=tahoelafs\" \"HOME=${TAHOE_DIR}\"";
      echo '';
      echo '[Install]';
      echo 'WantedBy=multi-user.target'; } > "$TAHOELAFS_DAEMON_FILE"
    systemctl enable "tahoelafs-${daemon_name}"
    systemctl daemon-reload
    systemctl start "tahoelafs-${daemon_name}"
}

function create_tahoelafs_web {
    if [ ! -d /var/www/tahoelafs/htdocs ]; then
        mkdir -p /var/www/tahoelafs/htdocs
    fi
    TAHOELAFS_LOGIN_TEXT=$'Tahoe-LAFS login'

    tahoelafs_nginx_site=/etc/nginx/sites-available/tahoelafs
    { echo 'server {';
      echo "    listen 127.0.0.1:$TAHOELAFS_ONION_PORT default_server;";
      echo "    server_name $TAHOELAFS_ONION_HOSTNAME;";
      echo ''; } > "$tahoelafs_nginx_site"
    function_check nginx_security_options
    nginx_security_options tahoelafs
    { echo '';
      echo '  # Logs';
      echo '  access_log /dev/null;';
      echo '  error_log /dev/null;';
      echo '';
      echo '  # Root';
      echo "  root /var/www/tahoelafs/htdocs;";
      echo '';
      echo '  location / {';
      echo "    auth_basic \"${TAHOELAFS_LOGIN_TEXT}\";";
      echo '    auth_basic_user_file /etc/nginx/.htpasswd-tahoelafs;'; } >> "$tahoelafs_nginx_site"
    function_check nginx_limits
    nginx_limits tahoelafs '15m'
    { echo "    rewrite /(.*) /\$1 break;";
      echo "    proxy_set_header X-Real-IP \$remote_addr;";
      echo "    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;";
      echo "    proxy_set_header Host \$http_host;";
      echo '    proxy_set_header X-NginX-Proxy true;';
      echo "    proxy_pass http://localhost:${TAHOELAFS_PORT};";
      echo '    proxy_redirect off;';
      echo '  }';
      echo '}'; } >> "$tahoelafs_nginx_site"

    TAHOELAFS_ADMIN_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a tahoelafs -p "$TAHOELAFS_ADMIN_PASSWORD"
    if [ ! -f /etc/nginx/.htpasswd-tahoelafs ]; then
        touch /etc/nginx/.htpasswd-tahoelafs
    fi
    if grep -q "${MY_USERNAME}:" /etc/nginx/.htpasswd-tahoelafs; then
        sed -i "/${MY_USERNAME}:/d" /etc/nginx/.htpasswd-tahoelafs
    fi
    echo "${TAHOELAFS_ADMIN_PASSWORD}" | htpasswd -i -s /etc/nginx/.htpasswd-tahoelafs "${MY_USERNAME}"

    function_check nginx_ensite
    nginx_ensite tahoelafs
    systemctl reload nginx
}

function install_tahoelafs {
    if [ "$INSTALLING_MESH" ]; then
        return
    fi

    apt-get -yq install build-essential python-pip python-dev libffi-dev libssl-dev
    apt-get -yq install libcrypto++-dev python-pycryptopp python-cffi
    apt-get -yq install python-virtualenv apache2-utils

    if [ -d $TAHOE_DIR ]; then
        groupdel -f tahoelafs
        userdel -r tahoelafs
        rm -rf $TAHOE_DIR
    fi

    # create a user
    adduser --disabled-login --gecos 'tahoe-lafs' tahoelafs

    if [ ! -d $TAHOE_DIR ]; then
        echo $"$TAHOE_DIR directory was not created"
        exit 879335
    fi

    adduser tahoelafs debian-tor
    groupadd tahoelafs

    apt-get -yq install tahoe-lafs
    pip install tahoe-lafs[tor]

    if [ -d $TAHOE_DIR/Maildir ]; then
        rm -rf $TAHOE_DIR/Maildir
    fi

    # remove files we don't need
    rm -rf $TAHOE_DIR/.mutt
    rm $TAHOE_DIR/.emacs-mutt
    rm $TAHOE_DIR/.muttrc
    rm $TAHOE_DIR/.mutt-alias
    rm $TAHOE_DIR/.procmailrc

    # set permissions
    chown -R tahoelafs:debian-tor $TAHOE_DIR

    node_nick=$(get_tahoelafs_nick)
    client_nick=${MY_USERNAME}-client

    # create an onion address for storage node
    TAHOELAFS_STORAGE_ONION_HOSTNAME=$(add_onion_service storage-tahoelafs ${TAHOELAFS_STORAGE_PORT} ${TAHOELAFS_STORAGE_ONION_PORT} "${node_nick}")

    # create an onion address for client node
    TAHOELAFS_ONION_HOSTNAME=$(add_onion_service tahoelafs 80 ${TAHOELAFS_ONION_PORT})

    create_tahoelafs_stealth_node "$TAHOE_DIR/storage" "$TAHOE_DIR/client" "${node_nick}" "${client_nick}"

    # start the storage node
    su -c "/usr/bin/python2 /usr/bin/tahoe start $TAHOE_DIR/storage" - tahoelafs
    create_tahoelafs_daemon "storage"

    # start the client
    su -c "/usr/bin/python2 /usr/bin/tahoe start $TAHOE_DIR/client" - tahoelafs
    add_tahoelafs_server "$(get_tahoelafs_storage_hostname)" "$(get_tahoelafs_public_key)" "${node_nick}" "$(get_tahoelafs_furl)"
    if ! grep -q "HidServAuth $(get_tahoelafs_storage_hostname)" /etc/tor/torrc; then
        echo $'Unable to create tahoelafs server'
        exit 738752
    fi
    if [ ! -f ${tahoelafs_storage_file} ]; then
        echo $'tahoelafs server file missing'
        exit 529362
    fi
    create_tahoelafs_daemon "client"

    set_completion_param "tahoelafs onion domain" "$TAHOELAFS_ONION_HOSTNAME"

    create_tahoelafs_web
    onion_update
    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0