#!/bin/bash

[ -z "$CRYPTSETUP_PATH" ] && CRYPTSETUP_PATH=".."
CRYPTSETUP=$CRYPTSETUP_PATH/cryptsetup
MNT_DIR="./mnt_luks"
DEV_NAME="dummy"
DEV_NAME2="ymmud"
PWD1="93R4P4pIqAH8"
PWD2="mymJeD8ivEhE"
FAST_PBKDF_OPT="--pbkdf pbkdf2 --pbkdf-force-iterations 1000"
SKIP_COUNT=0

CRYPTSETUP_VALGRIND=../.libs/cryptsetup
CRYPTSETUP_LIB_VALGRIND=../.libs

cleanup() {
	[ -b /dev/mapper/$DEV_NAME ] && dmsetup remove --retry $DEV_NAME
	udevadm settle >/dev/null 2>&1
	if [ -d "$MNT_DIR" ] ; then
		umount -f $MNT_DIR 2>/dev/null
		rmdir $MNT_DIR 2>/dev/null
	fi
	rmmod scsi_debug >/dev/null 2>&1
}

fail()
{
	[ -n "$1" ] && echo "FAIL $1"
	echo "FAILED backtrace:"
	while caller $frame; do ((frame++)); done
	cleanup
	exit 100
}

skip()
{
	echo "TEST SKIPPED: $1"
	cleanup
	exit 77
}

function valgrind_setup()
{
	command -v valgrind >/dev/null || fail "Cannot find valgrind."
	[ ! -f $CRYPTSETUP_VALGRIND ] && fail "Unable to get location of cryptsetup executable."
	export LD_LIBRARY_PATH="$CRYPTSETUP_LIB_VALGRIND:$LD_LIBRARY_PATH"
}

function valgrind_run()
{
	INFOSTRING="$(basename ${BASH_SOURCE[1]})-line-${BASH_LINENO[0]}" ./valg.sh ${CRYPTSETUP_VALGRIND} "$@"
}

add_device() {
	rmmod scsi_debug >/dev/null 2>&1
	[ -d /sys/module/scsi_debug ] && skip "Cannot use scsi_debug module (in use or compiled-in)."

	modprobe scsi_debug $@ delay=0 >/dev/null 2>&1
	[ $? -ne 0 ] && skip "This kernel seems to not support proper scsi_debug module."

	sleep 1
	SCSI_DEV=$(grep -l -e scsi_debug /sys/block/*/device/model | cut -f4 -d /)

	[ -b "/dev/$SCSI_DEV" ] || fail "Cannot find $SCSI_DEV."
}

add_image()
{
	dd if=/dev/zero of=$DEV bs=1M count=32 >/dev/null 2>&1
}

function dm_crypt_features()
{
	modprobe dm-crypt >/dev/null 2>&1 || fail "dm-crypt failed to load"
	VER_STR=$(dmsetup targets | grep crypt | cut -f2 -dv)
	[ -z "$VER_STR" ] && fail "Failed to parse dm-crypt version."

	VER_MAJ=$(echo $VER_STR | cut -f 1 -d.)
	VER_MIN=$(echo $VER_STR | cut -f 2 -d.)
	VER_PTC=$(echo $VER_STR | cut -f 3 -d.)

	[ $VER_MAJ -lt 1 ] && return
	[ $VER_MAJ -gt 1 ] && {
		DM_PERF_CPU=1
		DM_SECTOR_SIZE=1
		test -d /proc/sys/kernel/keys && DM_KEYRING=1
		return
	}

	[ $VER_MIN -lt 14 ] && return
	DM_PERF_CPU=1
	if [ $VER_MIN -ge 17 -o \( $VER_MIN -eq 14 -a $VER_PTC -ge 5 \) ]; then
		DM_SECTOR_SIZE=1
	fi
	if [ $VER_MIN -gt 18 -o \( $VER_MIN -eq 18 -a $VER_PTC -ge 1 \) ]; then
		 test -d /proc/sys/kernel/keys && DM_KEYRING=1
	fi

	[ $VER_MIN -lt 22 ] && return
	DM_PERF_NO_WORKQUEUE=1
}

function dm_crypt_keyring_support()
{
	VER_STR=$(dmsetup targets | grep crypt | cut -f2 -dv)
	[ -z "$VER_STR" ] && fail "Failed to parse dm-crypt version."

	VER_MAJ=$(echo $VER_STR | cut -f 1 -d.)
	VER_MIN=$(echo $VER_STR | cut -f 2 -d.)

	# run the test with dm-crypt v1.15.0+ on purpose
	# the fix is in dm-crypt v1.18.1+
	[ $VER_MAJ -gt 1 ] && return 0
	[ $VER_MAJ -lt 1 ] && return 1
	[ $VER_MIN -ge 15 ]
}

format() # format
{
	add_image

	echo $PWD1 | $CRYPTSETUP luksFormat --type $1 $DEV -q  $FAST_PBKDF_OPT -c aes-cbc-essiv:sha256
	[ $? -ne 0 ] && fail "Format failed."

	# test some operation, just in case
	echo -e "$PWD1\n$PWD2" | $CRYPTSETUP luksAddKey $DEV -i1 --new-key-slot 1
	[ $? -ne 0 ] && fail "Keyslot add failed."

	$CRYPTSETUP -q luksKillSlot $DEV 1
	[ $? -ne 0 ] && fail "Keyslot removal failed."
}

check_sector_size() # $1 expected sector size
{
	$CRYPTSETUP status $DEV_NAME | grep "sector size" | grep -q $1 || fail
	if [ $S -gt 512 ]; then
		dmsetup table $DEV_NAME | grep -q "sector_size:$1" || fail
	fi
}

check_io()
{
	dd if=/dev/mapper/$DEV_NAME of=/dev/null bs=1M count=32 iflag=direct 2>/dev/null || fail
	dd if=/dev/zero of=/dev/mapper/$DEV_NAME bs=1M count=32 oflag=direct 2>/dev/null || fail
}

[ ! -x "$CRYPTSETUP" ] && skip "Cannot find $CRYPTSETUP, test skipped."
[ -n "$VALG" ] && valgrind_setup && CRYPTSETUP=valgrind_run
if [ $(id -u) != 0 ]; then
	skip "You must be root to run this test, test skipped."
fi

dm_crypt_features

[ ! -d $MNT_DIR ] && mkdir $MNT_DIR

echo "[1] Using tmpfs for image"
DEV="$MNT_DIR/test.img"
mount -t tmpfs none $MNT_DIR || skip "Mounting tmpfs not available."

add_image
echo "[2] Kernel dmcrypt performance options"
if [ -z "$DM_PERF_CPU" ]; then
	echo "TEST SKIPPED: dmcrypt options not available"
	SKIP_COUNT=$((SKIP_COUNT+1))
else
	echo -n "PLAIN: same_cpu_crypt submit_from_cpus "
	echo -e "$PWD1" | $CRYPTSETUP open -q --type plain --hash sha256 $DEV $DEV_NAME --perf-same_cpu_crypt --perf-submit_from_crypt_cpus || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	check_io
	$CRYPTSETUP close $DEV_NAME || fail
	echo -n "allow_discards "
	echo -e "$PWD1" | $CRYPTSETUP open -q --type plain --hash sha256 $DEV $DEV_NAME --perf-same_cpu_crypt --allow-discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	check_io
	$CRYPTSETUP close $DEV_NAME || fail
	echo -e "$PWD1" | $CRYPTSETUP open -q --type plain --hash sha256 $DEV $DEV_NAME || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh --hash sha256 -q $DEV_NAME --perf-same_cpu_crypt --allow-discards || fail
	# Hash affects volume key for plain device. Check we can detect it
	echo -e "$PWD1" | $CRYPTSETUP refresh -q $DEV_NAME --hash sha512 --perf-same_cpu_crypt --allow-discards 2>/dev/null && fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh --hash sha256 -q $DEV_NAME --allow-discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh --hash sha256 -q $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards && fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh --hash sha256 $DEV $DEV_NAME2 2>/dev/null && fail
	if [ -n "$DM_PERF_NO_WORKQUEUE" ]; then
		echo -n "no_read_workqueue no_write_workqueue"
		echo -e "$PWD1" | $CRYPTSETUP refresh --hash sha256 -q $DEV_NAME --perf-no_read_workqueue --perf-no_write_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_read_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_write_workqueue || fail
		check_io
	fi
	$CRYPTSETUP close $DEV_NAME || fail
	echo

	format luks1
	echo -n "LUKS: same_cpu_crypt submit_from_cpus "
	echo -e "$PWD1" | $CRYPTSETUP open --type luks1 $DEV $DEV_NAME --perf-same_cpu_crypt --perf-submit_from_crypt_cpus || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	$CRYPTSETUP close $DEV_NAME || fail
	echo -n "allow_discards "
	echo -e "$PWD1" | $CRYPTSETUP open --type luks1 $DEV $DEV_NAME --perf-same_cpu_crypt --allow-discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP close $DEV_NAME || fail
	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME --allow-discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME --allow-discards --perf-same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards && fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME2 2>/dev/null && fail
	if [ -n "$DM_PERF_NO_WORKQUEUE" ]; then
		echo -n "no_read_workqueue no_write_workqueue"
		echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME  --perf-no_read_workqueue --perf-no_write_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_read_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_write_workqueue || fail
	fi
	$CRYPTSETUP close $DEV_NAME || fail
	echo

	format luks2
	echo -n "LUKS2: same_cpu_crypt submit_from_cpus "
	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME --perf-same_cpu_crypt --perf-submit_from_crypt_cpus --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	$CRYPTSETUP close $DEV_NAME || fail
	# Stored in metadata
	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	$CRYPTSETUP close $DEV_NAME || fail
	echo -n "allow_discards [persistent flags] "
	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME --perf-same_cpu_crypt --allow-discards --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP close $DEV_NAME || fail
	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP close $DEV_NAME || fail

	echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --perf-same_cpu_crypt --perf-submit_from_crypt_cpus --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --perf-same_cpu_crypt --allow-discards --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --perf-submit_from_crypt_cpus || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt || fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus || fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME || fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --persistent || fail
	$CRYPTSETUP status $DEV_NAME | grep -q same_cpu_crypt && fail
	$CRYPTSETUP status $DEV_NAME | grep -q discards && fail
	$CRYPTSETUP status $DEV_NAME | grep -q submit_from_crypt_cpus && fail
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --disable-keyring || fail
	$CRYPTSETUP status $DEV_NAME | grep -q keyring && fail
	if [ -n "$DM_KEYRING" ]; then
		echo -n "keyring "
		echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME || fail
		$CRYPTSETUP status $DEV_NAME | grep -q keyring || fail
	fi
	if [ -n "$DM_PERF_NO_WORKQUEUE" ]; then
		echo -n "no_read_workqueue no_write_workqueue"
		echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME --perf-no_read_workqueue --perf-no_write_workqueue --persistent || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_read_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_write_workqueue || fail
		$CRYPTSETUP close $DEV_NAME || fail
		echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_read_workqueue || fail
		$CRYPTSETUP status $DEV_NAME | grep -q no_write_workqueue || fail
	fi
	echo -e "$PWD1" | $CRYPTSETUP refresh $DEV $DEV_NAME2 2>/dev/null && fail
	$CRYPTSETUP close $DEV_NAME || fail
	echo
fi

echo "[3] Kernel dmcrypt sector size options"
echo -e "$PWD1" | $CRYPTSETUP open --type plain --hash sha256 $DEV $DEV_NAME --sector-size 4096 >/dev/null 2>&1
ret=$?
[ -z "$DM_SECTOR_SIZE" -a $ret -eq 0 ] && fail "cryptsetup activated device with --sector-size option on incompatible kernel!"
if [ $ret -ne 0 ] ; then
	SKIP_COUNT=$((SKIP_COUNT+1))
	if [ $SKIP_COUNT -ge 2 ]; then
		skip "dmcrypt sector-size option not available"
	fi
	echo "TEST SKIPPED: dmcrypt sector-size option not available"
else
	$CRYPTSETUP close $DEV_NAME || fail

	echo -n "PLAIN sector size:"
	echo -e "$PWD1" | $CRYPTSETUP open --type plain --hash sha256 $DEV $DEV_NAME --sector-size 1234 >/dev/null 2>&1 && fail
	for S in 512 1024 2048 4096; do
		echo -n "[$S]"
		echo -e "$PWD1" | $CRYPTSETUP open -q --type plain --hash sha256 $DEV $DEV_NAME --sector-size $S || fail
		check_sector_size $S
		$CRYPTSETUP close $DEV_NAME || fail
	done

	echo -e "$PWD1" | $CRYPTSETUP open --type plain --hash sha256 $DEV $DEV_NAME --iv-large-sectors >/dev/null 2>&1 && fail
	for S in 1024 2048 4096; do
		echo -n "[$S/IV]"
		echo -e "$PWD1" | $CRYPTSETUP open -q --type plain --hash sha256 $DEV $DEV_NAME --sector-size $S --iv-large-sectors || fail
		check_sector_size $S
		dmsetup table $DEV_NAME | grep -q "iv_large_sectors" || fail
		$CRYPTSETUP close $DEV_NAME || fail
	done
	echo

	echo -n "LUKS2 sector size:"
	echo -e "$PWD1" | $CRYPTSETUP luksFormat --type luks2 -$DEV --sector-size 1234 >/dev/null 2>&1 && fail
	for S in 512 1024 2048 4096; do
		echo -n "[$S]"
		echo -e "$PWD1" | $CRYPTSETUP -q luksFormat --type luks2 --pbkdf pbkdf2 --pbkdf-force-iterations 1000 $DEV --sector-size $S || fail
		echo -e "$PWD1" | $CRYPTSETUP open $DEV $DEV_NAME || fail
		check_sector_size $S
		$CRYPTSETUP close $DEV_NAME || fail
	done
	echo
fi

echo "[4] Disappeared device test:"
KEY="00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"
for F in LUKS1 LUKS2 BITLK TCRYPT; do
	add_device dev_size_mb=1 sector_size=512 num_tgts=1 lbpu=1
	echo -n "$F"
	# Fake CRYPT UUID to force code to parse type-specific path
	dmsetup create $DEV_NAME --uuid CRYPT-$F-$DEV_NAME --table "0 1024 crypt aes-xts-plain64 $KEY 16 /dev/$SCSI_DEV 16"
	$CRYPTSETUP status $DEV_NAME >/dev/null 2>&1 || fail
	echo 1 > /sys/block/$SCSI_DEV/device/delete
	udevadm settle >/dev/null 2>&1
	$CRYPTSETUP status $DEV_NAME >/dev/null 2>&1 || fail
	dmsetup remove $DEV_NAME --retry || fail
	rmmod scsi_debug >/dev/null 2>&1
	echo -n "[OK] "
done
echo

cleanup
exit 0