From 2b95eb1d48a24c3799ac4971748fe2d50da26228 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Sun, 17 Sep 2017 20:07:10 +0200
Subject: Add usbkey script

---
 install          |   4 ++
 local/bin/usbkey | 190 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 194 insertions(+)
 create mode 100755 local/bin/usbkey

diff --git a/install b/install
index bd6ef50..c6b769e 100755
--- a/install
+++ b/install
@@ -114,3 +114,7 @@ fi
 if ask "Install lxc-net script"; then
 	inst local/bin/lxc-net ~/.local/bin/lxc-net
 fi
+
+if ask "Install usbkey script"; then
+	inst local/bin/usbkey ~/.local/bin/usbkey
+fi
diff --git a/local/bin/usbkey b/local/bin/usbkey
new file mode 100755
index 0000000..5e7648a
--- /dev/null
+++ b/local/bin/usbkey
@@ -0,0 +1,190 @@
+#!/bin/sh
+set -e
+
+UUID_KKEY="7930cd94-b56e-4395-8859-f34da77f29be"
+UUID_WKEY=""
+
+CRYPT_NAME="usbkey"
+MOUNT_PATH="/media/usbkey"
+
+op_mount() {
+	# First check if we have key drive
+	if [ ! -e "/dev/disk/by-uuid/$UUID_KKEY" ]; then
+		echo "Can't locate appropriate usb drive." >&2
+		exit 1
+	fi
+	# Decrypt drive
+	if [ -e "/dev/mapper/$CRYPT_NAME" ]; then
+		echo "USB key seems to be already decrypted" >&2
+	else
+		echo "Decrypting usb key" >&2
+		sudo -- cryptsetup open /dev/disk/by-uuid/"$UUID_KKEY" "$CRYPT_NAME"
+	fi
+	# Mount drive
+	if mount | grep -q "$MOUNT_PATH"; then
+		echo "USB key is already mounted" >&2
+	else
+		echo "Mounting usb key"
+		sudo -- mkdir -p "$MOUNT_PATH"
+		sudo -- mount -o uid="$(id -u)",gid="$(id -g)" "/dev/mapper/$CRYPT_NAME" "$MOUNT_PATH"
+	fi
+
+	echo "USB key drive mounted" >&2
+}
+
+op_unmount() {
+	# Unmount
+	if mount | grep -q "$MOUNT_PATH"; then
+		echo "Unmounting usb key" >&2
+		sync "$MOUNT_PATH"
+		sudo -- umount "$MOUNT_PATH"
+	fi
+	# Remove mount path
+	[ ! -d "$MOUNT_PATH" ] || sudo -- rmdir "$MOUNT_PATH"
+	# Close encryption
+	if [ -e "/dev/mapper/$CRYPT_NAME" ]; then
+		echo "Closing encryption on usb key" >&2
+		sudo -- cryptsetup close "$CRYPT_NAME"
+	fi
+
+	echo "USB key unmounted" >&2
+}
+
+check_mount() {
+	mount | grep "$MOUNT_PATH" | grep -q "/dev/mapper/$CRYPT_NAME"
+}
+
+op_sync() {
+	local DOUNMOUNT=false
+	local EXITC=0
+	if ! check_mount; then
+		DOUNMOUNT=true
+		op_mount
+	fi
+	if [ -e "/dev/disk/by-uuid/$UUID_WKEY" ]; then
+		# Mount backup usb
+		sudo -- cryptsetup open "/dev/disk/by-uuid/$UUID_WKEY" "$CRYPT_NAME-backup"
+		sudo -- mkdir -p "$MOUNT_PATH-backup"
+		sudo -- mount -o uid="$(id -u)",gid="$(id -g)" "/dev/mapper/$CRYPT_NAME-backup" "$MOUNT_PATH-backup"
+		# Sync them
+		rsync -aAxXS --delete --progress "$MOUNT_PATH/" "$MOUNT_PATH-backup/"
+		# Unmount it
+		sudo -- umount "$MOUNT_PATH-backup"
+		sudo -- rmdir "$MOUNT_PATH-backup"
+		sudo -- cryptsetup close "$CRYPT_NAME-backup"
+	else
+		echo "USB backup key seems to not be inserted. Please do so." >&2
+		EXITC=1
+	fi
+	if $DOUNMOUNT; then
+		op_unmount
+	fi
+	exit $EXITC
+}
+
+ssh_list() {
+	check_mount || op_mount
+	for KEY in $(find "$MOUNT_PATH/ssh" -name '*.pub'); do
+		local N="${KEY#$MOUNT_PATH/ssh/}"
+		echo -n "${N%.pub}: "
+		sed -n 's/ssh-rsa .* \(.*\)/\1/p' "$KEY"
+	done
+}
+
+ssh_generate() {
+	check_mount || op_mount
+	if [ -f "$MOUNT_PATH/ssh/$NAME" ]; then
+		echo "Key $NAME seems to already exists." >&2
+		exit 1
+	fi
+	echo -n "Please enter comment: "
+	read COMMENT
+	ssh-keygen -f "$MOUNT_PATH/ssh/$NAME" -C "$COMMENT"
+}
+
+ssh_import() {
+	check_mount || op_mount
+	if [ -f "$MOUNT_PATH/ssh/$NAME" ] && [ -f "$MOUNT_PATH/ssh/$NAME.pub" ]; then
+		echo "There is no key named $NAME" >&2
+		exit 1
+	fi
+	cp "$MOUNT_PATH/ssh/$NAME" ~/.ssh/
+	cp "$MOUNT_PATH/ssh/$NAME.pub" ~/.ssh/
+}
+
+
+unknown_argument() {
+	echo "Unknown argument: $1"
+	exit 1
+}
+# Parse operation (operation have to be first)
+case "$1" in
+	-h|--help)
+		echo "Usb key manager"
+		echo "Usage: usbkey OPERATION ..."
+		echo
+		echo "Operations:"
+		echo "  mount: Mount key of usb driver"
+		echo "  unmount: Unmount usb driver"
+		echo "  sync: Synchronize drive to bakup drive"
+		echo "  gpg-import: Import gpg key"
+		echo "  ssh-import: Import ssh key"
+		echo "  ssh-generate: Generate new ssh key"
+		echo "  ssh-list: List all keys in store"
+		echo "  openvpn-get: Get keys for some host"
+		echo "  openvpn-generate: Generate key for new host"
+		exit 0
+		;;
+	mount|unmount|sync|gpg-import|ssh-import|ssh-generate|ssh-list|openvpn-get|openvpn-generate)
+		OPERATION="$1"
+		;;
+	*)
+		unknown_argument "$1"
+		;;
+esac
+shift
+# Parse rest of the arguments
+while [ $# -gt 0 ]; do
+	case "$1" in
+		-h|--help)
+			echo "Usb key manager"
+			case "$OPERATION" in
+				mount|unmount|sync)
+					echo "Usage: usbkey $OPERATION [-h]"
+					;;
+				ssh-*)
+					echo "Usage: usbkey $OPERATION NAME [-h]"
+					;;
+				# TODO
+			esac
+			exit 0
+			;;
+		*)
+			if [[ "$OPERATION" = ssh-* ]] && [ -z "$NAME" ]; then
+				NAME="$1"
+			else
+				unknown_argument "$1"
+			fi
+			;;
+	esac
+	shift
+done
+
+case "$OPERATION" in
+	mount)
+		op_mount
+		;;
+	unmount)
+		op_unmount
+		;;
+	sync)
+		op_sync
+		;;
+	ssh-list)
+		ssh_list
+		;;
+	*)
+		echo "Operation $OPERATION not implemented" >&2
+		exit 2
+		;;
+esac
-- 
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