371 lines
14 KiB
Bash
Executable File
371 lines
14 KiB
Bash
Executable File
#!/bin/bash
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# _____ _ _
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# | __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
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# | __| _| -_| -_| . | . | | . | . | | -_|
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# |__| |_| |___|___|___|___|_|_|_|___|___|_|_|___|
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#
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# Freedom in the Cloud
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#
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# gpg functions
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#
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# License
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# =======
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#
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# Copyright (C) 2016-2018 Bob Mottram <bob@freedombone.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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function gpg_update_mutt {
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key_username="$1"
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if [ ! -f "/home/$key_username/.muttrc" ]; then
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return
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fi
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CURR_EMAIL_ADDRESS=$key_username@$HOSTNAME
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CURR_GPG_ID=$(gpg --homedir="/home/$key_username/.gnupg" --list-keys "$CURR_EMAIL_ADDRESS" | sed -n '2p' | sed 's/^[ \t]*//')
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# If the default key is specified within gpg.conf
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if [ -f "/home/$key_username/gpg.conf" ]; then
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if grep -q "default-key" "/home/$key_username/gpg.conf"; then
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default_gpg_key=$(grep "default-key" "/home/$key_username/gpg.conf")
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if [[ "$default_gpg_key" != *'#'* ]]; then
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default_gpg_key=$(grep "default-key" "/home/$key_username/gpg.conf" | awk -F ' ' '{print $2}')
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if [ ${#default_gpg_key} -gt 3 ]; then
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CURR_GPG_ID=$(gpg --homedir="/home/$key_username/.gnupg" --list-keys "$default_gpg_key" | sed -n '2p' | sed 's/^[ \t]*//')
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fi
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fi
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fi
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fi
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sed -i "s|set pgp_encrypt_only_command.*|set pgp_encrypt_only_command=\"/usr/lib/mutt/pgpewrap gpg --batch --quiet --no-verbose --output - --encrypt --textmode --armor --trust-model always --encrypt-to $CURR_GPG_ID -- -r %r -- %f\"|g" "/home/$key_username/.muttrc"
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sed -i "s|set pgp_encrypt_sign_command.*|set pgp_encrypt_sign_command=\"/usr/lib/mutt/pgpewrap gpg %?p?--passphrase-fd 0? --batch --quiet --no-verbose --textmode --output - --encrypt --sign %?a?-u %a? --armor --trust-model always --encrypt-to $CURR_GPG_ID -- -r %r -- %f\"|g" "/home/$key_username/.muttrc"
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chown "$key_username":"$key_username" "/home/$key_username/.muttrc"
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}
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function gpg_import_public_key {
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key_username="$1"
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key_filename="$2"
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gpg --homedir="/home/$key_username/.gnupg" --import "$key_filename"
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gpg_set_permissions "$key_username"
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}
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function gpg_import_private_key {
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key_username="$1"
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key_filename="$2"
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gpg --homedir="/home/$key_username/.gnupg" --allow-secret-key-import --import "$key_filename"
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gpg_set_permissions "$key_username"
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}
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function gpg_export_public_key {
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key_username="$1"
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key_id="$2"
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key_filename="$3"
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chown -R "$key_username":"$key_username" "/home/$key_username/.gnupg"
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su -m root -c "gpg --homedir /home/$key_username/.gnupg --output $key_filename --armor --export $key_id" - "$key_username"
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}
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function gpg_export_private_key {
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key_username=$1
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key_id=$2
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key_filename=$3
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chown -R "$key_username":"$key_username" "/home/$key_username/.gnupg"
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su -m root -c "gpg --homedir=/home/$key_username/.gnupg --armor --output $key_filename --export-secret-key $key_id" - "$key_username"
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}
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function gpg_create_key {
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key_username="$1"
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key_passphrase="$2"
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gpg_dir="/home/$key_username/.gnupg"
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{ echo 'Key-Type: eddsa';
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echo 'Key-Curve: Ed25519';
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echo 'Subkey-Type: eddsa';
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echo 'Subkey-Curve: Ed25519';
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echo "Name-Real: $MY_NAME";
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echo "Name-Email: $MY_EMAIL_ADDRESS";
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echo 'Expire-Date: 0'; } > "/home/$key_username/gpg-genkey.conf"
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cat "/home/$key_username/gpg-genkey.conf"
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if [ "$key_passphrase" ]; then
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echo "Passphrase: $key_passphrase" >> "/home/$key_username/gpg-genkey.conf"
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else
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echo "Passphrase: $PROJECT_NAME" >> "/home/$key_username/gpg-genkey.conf"
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fi
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chown "$key_username":"$key_username" "/home/$key_username/gpg-genkey.conf"
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echo $'Generating a new GPG key'
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su -m root -c "gpg --homedir /home/$key_username/.gnupg --batch --full-gen-key /home/$key_username/gpg-genkey.conf" - "$key_username"
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chown -R "$key_username":"$key_username" "/home/$key_username/.gnupg"
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KEY_EXISTS=$(gpg_key_exists "$key_username" "$MY_EMAIL_ADDRESS")
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if [[ $KEY_EXISTS == "no" ]]; then
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echo $"A GPG key for $MY_EMAIL_ADDRESS could not be created"
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exit 63621
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fi
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rm "/home/$key_username/gpg-genkey.conf"
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CURR_GPG_PUBLIC_KEY_ID=$(gpg_pubkey_from_email "$key_username" "$MY_EMAIL_ADDRESS")
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if [ ${#CURR_GPG_PUBLIC_KEY_ID} -lt 4 ]; then
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echo $"GPG public key ID could not be obtained for $MY_EMAIL_ADDRESS"
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exit 825292
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fi
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gpg_set_permissions "$key_username"
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}
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function gpg_delete_key {
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key_username="$1"
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key_id="$2"
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chown -R "$key_username":"$key_username" "/home/$key_username/.gnupg"
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su -c "gpg --batch --quiet --homedir=/home/$key_username/.gnupg --delete-secret-key $key_id" - "$key_username"
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su -c "gpg --batch --quiet --homedir=/home/$key_username/.gnupg --delete-key $key_id" - "$key_username"
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}
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function gpg_set_permissions {
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key_username=$1
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if [[ "$key_username" != 'root' ]]; then
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chmod 700 "/home/$key_username/.gnupg"
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chmod -R 600 "/home/$key_username/.gnupg/"*
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printf '%%Assuan%%\nsocket=/dev/shm/S.dirmngr\n' > "/home/$key_username/.gnupg/S.dirmngr"
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if [ -d "/home/$key_username/.gnupg/crls.d" ]; then
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chmod +x "/home/$key_username/.gnupg/crls.d"
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fi
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chown -R "$key_username":"$key_username" "/home/$key_username/.gnupg"
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else
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chmod 700 /root/.gnupg
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chmod -R 600 /root/.gnupg/*
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printf '%%Assuan%%\nsocket=/dev/shm/S.dirmngr\n' > /root/.gnupg/S.dirmngr
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if [ -d /root/.gnupg/crls.d ]; then
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chmod +x /root/.gnupg/crls.d
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fi
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chown -R "$key_username":"$key_username" /root/.gnupg
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fi
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}
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function gpg_reconstruct_key {
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key_username=$1
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key_interactive=$2
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if [ ! -d "/home/$key_username/.gnupg_fragments" ]; then
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return
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fi
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cd "/home/$key_username/.gnupg_fragments" || exit 3468346
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# shellcheck disable=SC2012
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no_of_shares=$(ls -afq keyshare.asc.* | wc -l)
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if (( no_of_shares < 4 )); then
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if [ "$key_interactive" ]; then
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dialog --title $"Recover Encryption Keys" --msgbox $'Not enough fragments to reconstruct the key' 6 70
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else
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echo $'Not enough fragments to reconstruct the key'
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fi
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exit 7348
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fi
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if ! gfcombine "/home/$key_username/.gnupg_fragments/keyshare*"; then
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if [ "$key_interactive" ]; then
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dialog --title $"Recover Encryption Keys" --msgbox $'Unable to reconstruct the key' 6 70
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else
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echo $'Unable to reconstruct the key'
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fi
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exit 7348
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fi
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KEYS_FILE=/home/$key_username/.gnupg_fragments/keyshare.asc
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if [ ! -f "$KEYS_FILE" ]; then
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if [ "$key_interactive" ]; then
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dialog --title $"Recover Encryption Keys" --msgbox $'Unable to reconstruct the key' 6 70
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else
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echo $'Unable to reconstruct the key'
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fi
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exit 52852
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fi
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if ! gpg --homedir="/home/$key_username/.gnupg" --allow-secret-key-import --import "$KEYS_FILE"; then
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rm "$KEYS_FILE"
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rm -rf "/home/$key_username/.tempgnupg"
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if [ "$key_interactive" ]; then
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dialog --title $"Recover Encryption Keys" --msgbox $'Unable to import gpg key' 6 70
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else
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echo $'Unable to import gpg key'
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fi
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exit 96547
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fi
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rm "$KEYS_FILE"
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gpg_set_permissions "$key_username"
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if [ "$key_interactive" ]; then
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dialog --title $"Recover Encryption Keys" --msgbox $'Key has been reconstructed' 6 70
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else
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echo $'Key has been reconstructed'
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fi
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}
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function gpg_agent_setup {
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gpg_username=$1
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if [[ $gpg_username == 'root' ]]; then
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if ! grep -q 'GPG_TTY' /root/.bashrc; then
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{ echo '';
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echo "GPG_TTY=\$(tty)";
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echo 'export GPG_TTY'; } >> /root/.bashrc
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fi
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if grep -q '# use-agent' /root/.gnupg/gpg.conf; then
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sed -i 's|# use-agent|use-agent|g' /root/.gnupg/gpg.conf
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fi
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if ! grep -q 'use-agent' /root/.gnupg/gpg.conf; then
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echo 'use-agent' >> /root/.gnupg/gpg.conf
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fi
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{ echo 'default-cache-ttl 300';
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echo 'max-cache-ttl 999999';
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echo 'allow-loopback-pinentry'; } > /root/.gnupg/gpg-agent.conf
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if [ -f /root/.gnupg/S.dirmngr ]; then
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rm /root/.gnupg/S.dirmngr
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fi
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echo RELOADAGENT | gpg-connect-agent
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else
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if ! grep -q 'GPG_TTY' "/home/$gpg_username/.bashrc"; then
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{ echo '';
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echo "GPG_TTY=\$(tty)";
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echo 'export GPG_TTY'; } >> "/home/$gpg_username/.bashrc"
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chown "$gpg_username":"$gpg_username" "/home/$gpg_username/.bashrc"
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fi
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if grep -q '# use-agent' "/home/$gpg_username/.gnupg/gpg.conf"; then
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sed -i 's|# use-agent|use-agent|g' "/home/$gpg_username/.gnupg/gpg.conf"
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fi
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if ! grep -q 'use-agent' "/home/$gpg_username/.gnupg/gpg.conf"; then
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echo 'use-agent' >> "/home/$gpg_username/.gnupg/gpg.conf"
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fi
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if ! grep -q 'pinentry-mode loopback' "/home/$gpg_username/.gnupg/gpg.conf"; then
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echo 'pinentry-mode loopback' >> "/home/$gpg_username/.gnupg/gpg.conf"
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fi
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echo 'default-cache-ttl 300' > "/home/$gpg_username/.gnupg/gpg-agent.conf"
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echo 'max-cache-ttl 999999' >> "/home/$gpg_username/.gnupg/gpg-agent.conf"
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echo 'allow-loopback-pinentry' >> "/home/$gpg_username/.gnupg/gpg-agent.conf"
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if [ -f "/home/$gpg_username/.gnupg/S.dirmngr" ]; then
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rm "/home/$gpg_username/.gnupg/S.dirmngr"
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fi
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if [[ "$gpg_username" != "$USER" ]]; then
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su -c "echo RELOADAGENT | gpg-connect-agent" - "$gpg_username"
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else
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echo RELOADAGENT | gpg-connect-agent
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fi
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fi
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}
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function gpg_agent_enable {
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gpg_username=$1
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if [[ $gpg_username == 'root' ]]; then
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return
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else
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if grep -q 'GPG_TTY' "/home/$gpg_username/.bashrc"; then
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sed -i '/GPG_TTY/d' "/home/$gpg_username/.bashrc"
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chown "$gpg_username":"$gpg_username" "/home/$gpg_username/.bashrc"
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fi
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if grep -q 'use-agent' "/home/$gpg_username/.gnupg/gpg.conf"; then
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sed -i '/use-agent/d' "/home/$gpg_username/.gnupg/gpg.conf"
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fi
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if grep -q 'pinentry-mode loopback' "/home/$gpg_username/.gnupg/gpg.conf"; then
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sed -i '/pinentry-mode loopback/d' "/home/$gpg_username/.gnupg/gpg.conf"
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fi
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if [ -f "/home/$gpg_username/.gnupg/gpg-agent.conf" ]; then
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rm "/home/$gpg_username/.gnupg/gpg-agent.conf"
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fi
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if [[ "$gpg_username" != "$USER" ]]; then
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su -c "echo RELOADAGENT | gpg-connect-agent" - "$gpg_username"
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else
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echo RELOADAGENT | gpg-connect-agent
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fi
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fi
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}
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function gpg_pubkey_from_email {
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key_owner_username=$1
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key_email_address=$2
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key_id=
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if [[ $key_owner_username != "root" ]]; then
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key_id=$(su -c "gpg --list-keys $key_email_address" - "$key_owner_username" | sed -n '2p' | sed 's/^[ \t]*//')
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# If the default key is specified within gpg.conf
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if [ -f "/home/$key_owner_username/gpg.conf" ]; then
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if grep -q "default-key" "/home/$key_owner_username/gpg.conf"; then
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default_gpg_key=$(grep "default-key" "/home/$key_owner_username/gpg.conf")
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if [[ "$default_gpg_key" != *'#'* ]]; then
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default_gpg_key=$(grep "default-key" "/home/$key_owner_username/gpg.conf" | awk -F ' ' '{print $2}')
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if [ ${#default_gpg_key} -gt 3 ]; then
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key_id=$(su -c "gpg --list-keys $default_gpg_key" - "$key_owner_username" | sed -n '2p' | sed 's/^[ \t]*//')
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fi
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fi
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fi
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fi
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else
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key_id=$(gpg --list-keys "$key_email_address" | sed -n '2p' | sed 's/^[ \t]*//')
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# If the default key is specified within gpg.conf
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if [ -f /root/gpg.conf ]; then
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if grep -q "default-key" /root/gpg.conf; then
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default_gpg_key=$(grep "default-key" /root/gpg.conf)
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if [[ "$default_gpg_key" != *'#'* ]]; then
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default_gpg_key=$(grep "default-key" /root/gpg.conf | awk -F ' ' '{print $2}')
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if [ ${#default_gpg_key} -gt 3 ]; then
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key_id=$(gpg --list-keys "$default_gpg_key" | sed -n '2p' | sed 's/^[ \t]*//')
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fi
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fi
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fi
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fi
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fi
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echo "$key_id"
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}
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function enable_email_encryption_at_rest {
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for d in /home/*/ ; do
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USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
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if [[ $(is_valid_user "$USERNAME") == "1" ]]; then
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if grep -q '#| /usr/bin/gpgit.pl' "/home/$USERNAME/.procmailrc"; then
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sed -i 's@#| /usr/bin/gpgit.pl@| /usr/bin/gpgit.pl@g' "/home/$USERNAME/.procmailrc"
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sed -i 's|#:0 f|:0 f|g' "/home/$USERNAME/.procmailrc"
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fi
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fi
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done
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if grep -q '#| /usr/bin/gpgit.pl' /etc/skel/.procmailrc; then
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sed -i 's@#| /usr/bin/gpgit.pl@| /usr/bin/gpgit.pl@g' /etc/skel/.procmailrc
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sed -i 's|#:0 f|:0 f|g' /etc/skel/.procmailrc
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fi
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}
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function disable_email_encryption_at_rest {
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for d in /home/*/ ; do
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USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
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if [[ $(is_valid_user "$USERNAME") == "1" ]]; then
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if ! grep -q '#| /usr/bin/gpgit.pl' "/home/$USERNAME/.procmailrc"; then
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sed -i 's@| /usr/bin/gpgit.pl@#| /usr/bin/gpgit.pl@g' "/home/$USERNAME/.procmailrc"
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sed -i 's|:0 f|#:0 f|g' "/home/$USERNAME/.procmailrc"
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fi
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fi
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done
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if ! grep -q '#| /usr/bin/gpgit.pl' /etc/skel/.procmailrc; then
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sed -i 's@| /usr/bin/gpgit.pl@#| /usr/bin/gpgit.pl@g' /etc/skel/.procmailrc
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sed -i 's|:0 f|#:0 f|g' /etc/skel/.procmailrc
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fi
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}
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# NOTE: deliberately no exit 0
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