#!/bin/bash
#
# Test integritysetup compatibility.
#
INTSETUP=../integritysetup
INTSETUP_VALGRIND=../.libs/integritysetup
INTSETUP_LIB_VALGRIND=../.libs

DEV_NAME=dmc_test
DEV=test123.img
DEV2=test124.img
KEY_FILE=key.img

dmremove() { # device
	udevadm settle >/dev/null 2>&1
	dmsetup remove $1 >/dev/null 2>&1
}

cleanup() {
	[ -b /dev/mapper/$DEV_NAME ] && dmremove $DEV_NAME
	rm -f $DEV $DEV2 $KEY_FILE >/dev/null 2>&1
}

fail()
{
	echo
	echo "FAILED at line $(caller)"
	cleanup
	exit 100
}

skip()
{
	[ -n "$1" ] && echo "$1"
	exit 77
}

function dm_integrity_features()
{
	VER_STR=$(dmsetup targets | grep integrity | cut -f2 -dv)
	[ -z "$VER_STR" ] && skip "Cannot find dm-integrity target, test skipped."

	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_MIN -gt 1 ] && {
		DM_INTEGRITY_META=1
		DM_INTEGRITY_RECALC=1
	}
}

add_device() {
	cleanup
	dd if=/dev/urandom of=$KEY_FILE bs=1 count=512 >/dev/null 2>&1
	dd if=/dev/zero of=$DEV bs=1M count=32 >/dev/null 2>&1
	dd if=/dev/zero of=$DEV2 bs=1M count=32 >/dev/null 2>&1
	sync
}

status_check() # name value
{
	X=$($INTSETUP status $DEV_NAME | grep "$1" | sed 's/.*: //' | sed 's/^[[:space:]]*//')
	if [ "$X" != "$2" ] ; then
		echo "[status FAIL]"
		echo " Expecting $1:$2 got \"$X\"."
		fail
	fi
}

dump_check() # name value
{
	X=$($INTSETUP dump $DEV | grep "$1" | cut -d' '  -f 2)
	if [ "$X" != "$2" ] ; then
		echo "[dump FAIL]"
		echo " Expecting $1:$2 got \"$X\"."
		fail
	fi
}

kernel_param_check() # number value
{
	X=$(dmsetup table $DEV_NAME | cut -d " " -f $1)
	if [ "$X" != $2 ] ; then
		echo "[param_check FAIL]"
		echo "Expecting $2 got \"$X\"."
		fail
	fi
}

function valgrind_setup()
{
    which valgrind >/dev/null 2>&1 || fail "Cannot find valgrind."
    [ ! -f $INTSETUP_VALGRIND ] && fail "Unable to get location of cryptsetup executable."
    export LD_LIBRARY_PATH="$INTSETUP_LIB_VALGRIND:$LD_LIBRARY_PATH"
}

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

int_check_sum_only() # checksum
{
	VSUM=$(sha256sum /dev/mapper/$DEV_NAME | cut -d' ' -f 1)
	if [ "$VSUM" = "$1" ] ; then
		echo -n "[CHECKSUM OK]"
	else
		echo "[FAIL]"
		echo " Expecting $1 got $VSUM."
		fail
	fi
}

int_check_sum() # alg checksum [keyfile keysize]
{
	if [ -n "$4" ] ; then
		KEY_PARAMS="--integrity-key-file $3 --integrity-key-size $4"
	else
		KEY_PARAMS=""
	fi

	# Fill device with zeroes and reopen it
	dd if=/dev/zero of=/dev/mapper/$DEV_NAME bs=1M oflag=direct >/dev/null 2>&1
	dmremove $DEV_NAME

	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS || fail "Cannot activate device."

	int_check_sum_only $2
}

intformat() # alg alg_out tagsize sector_size csum [keyfile keysize]
{
	if [ -n "$7" ] ; then
		KEY_PARAMS="--integrity-key-file $6 --integrity-key-size $7"
	else
		KEY_PARAMS=""
	fi

	echo -n "[INTEGRITY:$2:$3:$4]"
	echo -n "[FORMAT]"
	$INTSETUP format -q --integrity $1 --tag-size $3 --sector-size $4 $KEY_PARAMS $DEV || fail "Cannot format device."
	dump_check "tag_size" $3
	dump_check "sector_size" $4
	echo -n "[ACTIVATE]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS || fail "Cannot activate device."
	status_check "tag size" $3
	status_check "integrity" $2
	status_check "sector size" "$4 bytes"
	int_check_sum $1 $5 $6 $7
	echo -n "[REMOVE]"
	$INTSETUP close $DEV_NAME || fail "Cannot deactivate device."
	echo "[OK]"
}

int_error_detection() # alg tagsize sector_size key_file key_size
{
	if [ -n "$5" ] ; then
		KEY_PARAMS="--integrity-key-file $4 --integrity-key-size $5"
	else
		KEY_PARAMS=""
	fi
	dd if=/dev/zero of=$DEV bs=1M count=32 >/dev/null 2>&1

	echo -n "[INTEGRITY:$1:$2:$3]"
	echo -n "[FORMAT]"
	$INTSETUP format -q --integrity $1 --tag-size $2 --sector-size $3 $KEY_PARAMS $DEV || fail "Cannot format device."
	echo -n "[ACTIVATE]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 --integrity-no-journal $KEY_PARAMS || fail "Cannot activate device."

	if [ -n "$4" -a -n "$5" ]; then
		echo -n "[KEYED HASH]"
		KEY_HEX=$(xxd -c 256 -l $5 -p $4)
		[ -z "$KEY_HEX" ] && fail "Cannot decode key."
		dmsetup table --showkeys $DEV_NAME | grep -q $KEY_HEX || fail "Key mismatch."
	fi

	echo -n "[WRITE DATA]"
	echo -n "EXAMPLE TEXT" | dd of=/dev/mapper/$DEV_NAME >/dev/null 2>&1 || fail "Cannot write to device."
	$INTSETUP close $DEV_NAME || fail "Cannot deactivate device."

	# find offset of data area
	ARR=($(dd if=$DEV bs=512 2>/dev/null | hexdump -C | grep 'EXAMPLE TEXT'))
	OFF_HEX=${ARR[0]}
	OFF_DEC=$((16#$OFF_HEX))

	echo -n "[CORRUPT DATA:$OFF_DEC]"
	echo -n "Z" | dd of=$DEV bs=1 seek=$OFF_DEC conv=notrunc >/dev/null 2>&1 || fail "Cannot write to device."

	echo -n "[DETECT ERROR]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS || fail "Cannot activate device."
	dd if=/dev/mapper/$DEV_NAME  >/dev/null 2>&1 && fail "Error detection failed."

	echo -n "[REMOVE]"
	$INTSETUP close $DEV_NAME || fail "Cannot deactivate device."
	echo "[OK]"
}

int_journal() # 1 alg, 2 tagsize, 3 sector_size, 4 watermark, 5 commit_time, 6 journal_integrity, 7 key-file, 8 key-size, 9 journal_integrity_out
{
    echo -n "[INTEGRITY JOURNAL:$6:${4}%:${5}ms]"
    echo -n "[FORMAT]"
    ARGS="--integrity $1 --journal-watermark $4 --journal-commit-time $5 --journal-integrity $6 --journal-integrity-key-file $7 --journal-integrity-key-size $8"
    $INTSETUP format -q --tag-size $2 --sector-size $3 $ARGS $DEV || fail "Cannot format device."

    echo -n "[ACTIVATE]"

    $INTSETUP open $DEV $DEV_NAME $ARGS || fail "Cannot activate device."

    echo -n "[KEYED HASH]"
    KEY_HEX=$(xxd -c 256 -l $8 -p $7)
    [ -z "$KEY_HEX" ] && fail "Cannot decode key."
    dmsetup table --showkeys $DEV_NAME | grep -q $KEY_HEX || fail "Key mismatch."

    status_check "journal watermark" "${4}%"
    status_check "journal commit time" "${5} ms"
    status_check "journal integrity MAC" $9

    echo -n "[REMOVE]"
    $INTSETUP close $DEV_NAME || fail "Cannot deactivate device."
    echo "[OK]"
}


int_journal_crypt() # crypt_alg crypt_alg_kernel crypt_key crypt_key_size
{
	echo -n "[JOURNAL CRYPT:$1:${4}B]"

	echo -n "[FORMAT]"
	ARGS="--journal-crypt $1 --journal-crypt-key-file $3 --journal-crypt-key-size $4"
	$INTSETUP format -q $ARGS $DEV || fail "Cannot format device."

	echo -n "[ACTIVATE]"
	$INTSETUP open $DEV $DEV_NAME $ARGS || fail "Cannot activate device."

	KEY_HEX=$(xxd -c 256 -l $4 -p $3)
	[ -z "$KEY_HEX" ] && fail "Cannot decode key."
	dmsetup table --showkeys $DEV_NAME | grep -q "journal_crypt:$2:$KEY_HEX" || fail "Key mismatch."

	$INTSETUP close $DEV_NAME
	echo "[OK]"
}

int_mode() # alg tag_size sector_size [keyfile keysize]
{
	if [ -n "$5" ] ; then
		KEY_PARAMS="--integrity-key-file $4 --integrity-key-size $5"
	else
		KEY_PARAMS=""
	fi

	echo -n "[MODE TESTS:$1:$2:$3]"
	ARGS="--tag-size $2 --sector-size $3"

	$INTSETUP format -q $ARGS $KEY_PARAMS $DEV --integrity $1 || fail "Cannot format device."

	echo -n "[JOURNALED WRITES]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS || fail "Cannot activate device with journal."
	status_check "mode" "read/write"
	kernel_param_check 7 "J"

	$INTSETUP close $DEV_NAME fail "Cannot deactivate device."

	echo -n "[DIRECT WRITES]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS --integrity-no-journal || fail "Cannot activate device without journal."
	status_check "mode" "read/write"
	status_check "journal" "not active"
	kernel_param_check 7 "D"

	$INTSETUP close $DEV_NAME fail "Cannot deactivate device."

	echo -n "[RECOVERY MODE]"
	$INTSETUP open $DEV $DEV_NAME --integrity $1 $KEY_PARAMS --integrity-recovery-mode || fail "Cannot activate device in recovery mode."
	status_check "mode" "read/write recovery"
	kernel_param_check 7 "R"

	$INTSETUP close $DEV_NAME fail "Cannot deactivate device."

	echo "[OK]"
}

[ $(id -u) != 0 ] && skip "WARNING: You must be root to run this test, test skipped."
[ ! -x "$INTSETUP" ] && skip "Cannot find $INTSETUP, test skipped."

[ -n "$VALG" ] && valgrind_setup && INTSETUP=valgrind_run
which hexdump >/dev/null 2>&1 || skip "WARNING: hexdump tool required."
modprobe dm-integrity >/dev/null 2>&1
dm_integrity_features

add_device
intformat crc32c      crc32c          4  512 08f63eb27fb9ce2ce903b0a56429c68ce5e209253ba42154841ef045a53839d7
intformat crc32       crc32           4  512 08f63eb27fb9ce2ce903b0a56429c68ce5e209253ba42154841ef045a53839d7
intformat sha1        sha1           20  512 6eedd6344dab8875cd185fcd6565dfc869ab36bc57e577f40c685290b1fa7fe7
intformat sha1        sha1           16 4096 e152ec88227b539cd9cafd8bdb587a1072d720cd6bcebe1398d4136c9e7f337b
intformat sha256      sha256         32  512 8e5fe4119558e117bfc40e3b0f13ade3abe497b52604d4c7cca0cfd6c7f4cf11
intformat hmac-sha256 hmac\(sha256\) 32  512 8e5fe4119558e117bfc40e3b0f13ade3abe497b52604d4c7cca0cfd6c7f4cf11 $KEY_FILE 32
intformat sha256      sha256         32 4096 33f7dfa5163ca9f740383fb8b0919574e38a7b20a94a4170fde4238196b7c4b4
intformat hmac-sha256 hmac\(sha256\) 32 4096 33f7dfa5163ca9f740383fb8b0919574e38a7b20a94a4170fde4238196b7c4b4 $KEY_FILE 32

echo "Error detection tests:"
int_error_detection crc32c      4  512
int_error_detection crc32c      4  4096
int_error_detection crc32       4  512
int_error_detection crc32       4  4096
int_error_detection sha1        20 512
int_error_detection sha1        16 512
int_error_detection sha1        20 4096
int_error_detection sha256      32 512
int_error_detection sha256      32 4096

which xxd >/dev/null 2>&1 || skip "WARNING: xxd tool required."
int_error_detection hmac-sha256 32 512 $KEY_FILE 32
int_error_detection hmac-sha256 32 4096 $KEY_FILE 32

echo "Journal parameters tests:"
# Watermark is calculated in kernel, so it can be rounded down/up
int_journal crc32  4  512  66 1000 hmac-sha256 $KEY_FILE 32 hmac\(sha256\)
int_journal sha256 32 4096 34 5000 hmac-sha1   $KEY_FILE 16 hmac\(sha1\)
int_journal sha1   20 512  75 9999 hmac-sha256 $KEY_FILE 32 hmac\(sha256\)

echo "Journal encryption tests:"
int_journal_crypt cbc-aes cbc\(aes\) $KEY_FILE 32
int_journal_crypt cbc-aes cbc\(aes\) $KEY_FILE 16
int_journal_crypt salsa20 salsa20    $KEY_FILE 32
int_journal_crypt ctr-aes ctr\(aes\) $KEY_FILE 32
int_journal_crypt ctr-aes ctr\(aes\) $KEY_FILE 16

echo "Mode tests:"
int_mode crc32c      4  512
int_mode crc32       4  512
int_mode sha1        20 512
int_mode sha256      32 512
int_mode hmac-sha256 32 512  $KEY_FILE 32
int_mode hmac-sha256 32 4096 $KEY_FILE 32

echo -n "Recalculate tags in-kernel:"
add_device
if [ -n "$DM_INTEGRITY_RECALC" ] ; then
	$INTSETUP format -q $DEV --no-wipe || fail "Cannot format device."
	$INTSETUP open $DEV $DEV_NAME --integrity-recalculate || fail "Cannot activate device."
	dd if=/dev/mapper/$DEV_NAME of=/dev/null bs=1M 2>/dev/null || fail "Cannot recalculate tags in-kernel"
	int_check_sum_only 08f63eb27fb9ce2ce903b0a56429c68ce5e209253ba42154841ef045a53839d7
	$INTSETUP close $DEV_NAME fail "Cannot deactivate device."
	echo "[OK]"
else
	echo "[N/A]"
fi

echo -n "Separate metadata device:"
if [ -n "$DM_INTEGRITY_META" ] ; then
	add_device
	$INTSETUP format -q $DEV --data-device $DEV2 || fail "Cannot format device."
	$INTSETUP open $DEV --data-device $DEV2 $DEV_NAME || fail "Cannot activate device."
	int_check_sum_only 83ee47245398adee79bd9c0a8bc57b821e92aba10f5f9ade8a5d1fae4d8c4302
	$INTSETUP status $DEV_NAME | grep -q 'metadata device:' || fail
	$INTSETUP close $DEV_NAME fail "Cannot deactivate device."
	echo "[OK]"
else
	echo "[N/A]"
fi

cleanup