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Bob Mottram authoredBob Mottram authored
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freedombone-utils-keys 8.60 KiB
#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# Encryption key related functions
# License
# =======
#
# Copyright (C) 2015-2016 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/>.
function reconstruct_key {
if [ ! -d /home/$MY_USERNAME/.gnupg_fragments ]; then
return
fi
cd /home/$MY_USERNAME/.gnupg_fragments
no_of_shares=$(ls -afq keyshare.asc.* | wc -l)
if (( no_of_shares < 4 )); then
dialog --title $"Recover Encryption Keys" --msgbox $'Not enough fragments to reconstruct the key' 6 70
exit 7348
fi
apt-get -yq install libgfshare-bin gnupg
gfcombine /home/$MY_USERNAME/.gnupg_fragments/keyshare*
if [ ! "$?" = "0" ]; then
dialog --title $"Recover Encryption Keys" --msgbox $'Unable to reconstruct the key' 6 70
exit 7348
fi
KEYS_FILE=/home/$MY_USERNAME/.gnupg_fragments/keyshare.asc
if [ ! -f $KEYS_FILE ]; then
dialog --title $"Recover Encryption Keys" --msgbox $'Unable to reconstruct the key' 6 70
fi
su -c "gpg --allow-secret-key-import --import $KEYS_FILE" - $MY_USERNAME
if [ ! "$?" = "0" ]; then
echo $'Unable to import gpg key'
shred -zu $KEYS_FILE
rm -rf /home/$MY_USERNAME/.tempgnupg
exit 9654
fi
shred -zu $KEYS_FILE
dialog --title $"Recover Encryption Keys" --msgbox $'Key has been reconstructed' 6 70
}
function interactive_gpg_from_usb {
dialog --title $"Recover Encryption Keys" \
--msgbox $'Plug in a USB keydrive containing a copy of your full key or key fragment' 6 70
HOME_DIR=/home/$MY_USERNAME
GPG_LOADING="yes"
SSH_IMPORTED="no"
GPG_CTR=0
while [[ $GPG_LOADING == "yes" ]]
do
detect_usb_drive
if [ ! -b $USB_DRIVE ]; then
if (( GPG_CTR > 0 )); then
reconstruct_key
return 0
fi
dialog --title $"Recover Encryption Keys" --msgbox $'No USB drive found' 6 30
exit 739836
fi
backup_mount_drive ${USB_DRIVE} ${MY_USERNAME}
if [ ! -d $USB_MOUNT ]; then
if (( GPG_CTR > 0 )); then
backup_unmount_drive ${USB_DRIVE}
reconstruct_key
return 0
fi
dialog --title $"Recover Encryption Keys" \
--msgbox $"There was a problem mounting the USB drive $USB_DRIVE to $USB_MOUNT" 6 70
backup_unmount_drive ${USB_DRIVE}
exit 74393
fi
if [ ! -d $USB_MOUNT/.gnupg ]; then
if [ ! -d $USB_MOUNT/.gnupg_fragments ]; then
if (( GPG_CTR > 0 )); then
backup_unmount_drive ${USB_DRIVE}
reconstruct_key
return 0
fi
dialog --title $"Recover Encryption Keys" \
--msgbox $"The directory $USB_MOUNT/.gnupg or $USB_MOUNT/.gnupg_fragments was not found" 6 70
backup_unmount_drive ${USB_DRIVE}
exit 723814
fi
fi
if [ -d $USB_MOUNT/letsencrypt ]; then
if [ ! -d /etc/letsencrypt ]; then
mkdir /etc/letsencrypt
fi
echo $'Recovering LetsEncrypt keys'
cp -r $USB_MOUNT/letsencrypt/* /etc/letsencrypt
fi
if [ -d $USB_MOUNT/.gnupg ]; then
if [ ! -d $HOME_DIR/.gnupg ]; then
mkdir $HOME_DIR/.gnupg
fi
echo $'Recovering GPG keys'
cp -r $USB_MOUNT/.gnupg/* $HOME_DIR/.gnupg
GPG_LOADING="no"
dialog --title $"Recover Encryption Keys" \
--msgbox $"GPG Keyring loaded to $HOME_DIR" 6 70
else
if [ ! -d $HOME_DIR/.gnupg_fragments ]; then
mkdir $HOME_DIR/.gnupg_fragments
fi
cp -r $USB_MOUNT/.gnupg_fragments/* $HOME_DIR/.gnupg_fragments
fi
if [[ $SSH_IMPORTED == "no" ]]; then
if [ -d $USB_MOUNT/.ssh ]; then
if [ ! -d $HOME_DIR/.ssh ]; then
mkdir $HOME_DIR/.ssh
fi
cp $USB_MOUNT/.ssh/* $HOME_DIR/.ssh
dialog --title $"Recover Encryption Keys" \
--msgbox $"ssh keys imported" 6 70
SSH_IMPORTED="yes"
fi
fi
if [ -d $USB_MOUNT ]; then
backup_unmount_drive ${USB_DRIVE}
fi
if [[ $GPG_LOADING == "yes" ]]; then
dialog --title $"Recover Encryption Keys" \
--msgbox $"Now remove the USB drive. Insert the next drive containing a key fragment, or select Ok to finish" 6 70
fi
GPG_CTR=$((GPG_CTR + 1))
done
}
function interactive_gpg_from_remote {
REMOTE_SERVERS_LIST=/home/$MY_USERNAME/keyshareservers.txt
# get a list of remote servers
${PROJECT_NAME}-remote -u $MY_USERNAME -l $REMOTE_SERVERS_LIST -t "Remote server"
if [ ! -f $REMOTE_SERVERS_LIST ]; then
dialog --title $"Encryption Keys Recovery" --msgbox $'Error obtaining server list' 6 70
return 1
fi
# check the number of entries in the file
no_of_servers=$(cat $REMOTE_SERVERS_LIST | wc -l)
if (( no_of_servers < 3 )); then
dialog --title $"Encryption Keys Recovery" \
--msgbox $'There must be at least three servers to recover the key' 6 70
return 2
fi
# try to recover the key from the servers
apt-get -yq install libgfshare-bin gnupg
${PROJECT_NAME}-recoverkey -u $MY_USERNAME -l $REMOTE_SERVERS_LIST
if [ ! "$?" = "0" ]; then
dialog --title $"Encryption Keys Recovery" --msgbox $'Your key could not be recovered' 6 70
return 3
fi
dialog --title $"Encryption Keys Recovery" --msgbox $'Your key has been recovered' 6 70
return 0
}
function interactive_gpg {
GPG_CONFIGURED="no"
while [[ $GPG_CONFIGURED != "yes" ]]
do
GPG_CONFIGURED="yes"
data=$(tempfile 2>/dev/null)
trap "rm -f $data" 0 1 2 5 15
dialog --backtitle $"Freedombone Configuration" \
--radiolist $"GPG/PGP keys for your system:" 13 70 3 \
1 $"Generate new keys (new user)" on \
2 $"Import keys from USB drive/s" off \
3 $"Retrieve keys from friends servers" off 2> $data
sel=$?
case $sel in
1) exit 1;;
255) exit 2;;
esac
case $(cat $data) in
1) if [ -d /home/${MY_USERNAME}/.gnupg ]; then
rm -rf /home/${MY_USERNAME}/.gnupg
fi
break;;
2) interactive_gpg_from_usb
break;;
3) interactive_gpg_from_remote
if [ ! "$?" = "0" ]; then
GPG_CONFIGURED="no"
fi;;
esac
done
}
function interactive_key_recovery {
data=$(tempfile 2>/dev/null)
trap "rm -f $data" 0 1 2 5 15
dialog --title $"Encryption Keys Recovery" \
--backtitle $"Freedombone Configuration" \
--defaultno \
--yesno $"Do you wish to recover your previous encryption keys from a USB master keydrive?" 7 60
sel=$?
case $sel in
1) return;;
255) return;;
esac
clear
apt-get -yq install cryptsetup
${PROJECT_NAME}-recoverkey -u $MY_USERNAME
if [ -d /home/$MY_USERNAME/.gnupg ]; then
cp -rf /home/$MY_USERNAME/.gnupg /root
fi
}
function set_password_for_all_users {
app_name="$1"
change_password="$2"
for d in /home/*/ ; do
USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
if [[ $(is_valid_user "$USERNAME") == "1" ]]; then
${PROJECT_NAME}-pass -u "${USERNAME}" -a "${app_name}" -p "${change_password}"
fi
done
}
# NOTE: deliberately there is no "exit 0"