#!/bin/bash

# For the license, see the LICENSE file in the root directory.
# set -x

ROOT=${abs_top_builddir:-$(pwd)/..}
TESTDIR=${abs_top_testdir:-$(dirname "$0")}

VTPM_NAME="${VTPM_NAME:-vtpm-test-tpm2-migration-key}"
SWTPM_DEV_NAME=/dev/${VTPM_NAME}
MIGRATION_PASSWORD="migration"
VOLATILESTATE=${TESTDIR}/data/migkey1/tpm2-volatilestate.bin
SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}

function cleanup()
{
	pid=$SWTPM_PID
	if [ -n "$pid" ]; then
		kill_quiet -9 "$pid"
	fi
	rm -rf "$migpwdfile" "$volatilestatefile" "$tpmstatedir" "$logfile"
}

trap "cleanup" EXIT

tpmstatedir="$(mktemp -d)"
if [ -z "$tpmstatedir" ]; then
	echo "Could not create temporary directory."
	exit 1
fi

migpwdfile="$(mktemp)"
if [ -z "$migpwdfile" ]; then
	echo "Could not create temporary file."
	exit 1
fi
echo -n "$MIGRATION_PASSWORD" > "$migpwdfile"

volatilestatefile="$(mktemp)"
if [ -z "$volatilestatefile" ]; then
	echo "Could not create temporary file."
	exit 1
fi
logfile="$(mktemp)" || exit 1

SWTPM_CMD_UNIX_PATH=${tpmstatedir}/unix-cmd.sock
SWTPM_CTRL_UNIX_PATH=${tpmstatedir}/unix-ctrl.sock

[ "${SWTPM_INTERFACE}" == "cuse" ] && source "${TESTDIR}/test_cuse"
source "${TESTDIR}/common"

# make a backup of the volatile state
TPM_PATH=$tpmstatedir
cp "${TESTDIR}"/data/tpm2state1/* "$TPM_PATH"

rm -f "${logfile}"
TPM_PATH=$TPM_PATH run_swtpm "${SWTPM_INTERFACE}" \
	--log "file=${logfile}" \
	--tpm2 \
	--migration-key "pwdfile=$migpwdfile,remove=false,kdf=sha512"

if ! kill_quiet -0 "${SWTPM_PID}"; then
	echo "Error: ${SWTPM_INTERFACE} TPM did not start."
	exit 1
fi

# Init the TPM
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -i; then
	echo "Error: Initializing the ${SWTPM_INTERFACE} TPM failed."
	exit 1
fi

if ! kill_quiet -0 "${SWTPM_PID}" 2>/dev/null; then
	echo "Error: ${SWTPM_INTERFACE} TPM not running anymore after INIT."
	exit 1
fi

# Read PCR 10 (from pcrextend -ha 10 -ic test)
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b\x03\x00\x04\x00' 100)
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 16 00 00 00 01 00 0b 03 00 04 00 00 00 00 01 00 20 f6 85 98 e5 86 8d e6 8b 97 29 99 60 f2 71 7d 17 67 89 a4 2f 9a ae a8 c7 b7 aa 79 a8 62 56 c1 de'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM_PCRRead(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Save the volatile state into a file
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" --save volatile "$volatilestatefile"; then
	echo "Error: Could not save the volatile state to ${volatilestatefile}."
	exit 1
fi
if [ ! -r "$volatilestatefile" ]; then
	echo "Error: Volatile state file $volatilestatefile does not exist."
	exit 1
fi

size=$(get_filesize "$volatilestatefile")
expsize="^([5689][0-9]{3})$"
if ! [[ $size =~ $expsize ]]; then
	echo "Error: Unexpected size of volatile state file."
	echo "       Expected file with size of $expsize, found $size bytes."
	exit 1
fi

if ! tmp=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -g | cut -d":" -f2); then
	echo "Error: Could not get the configuration flags of the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

if [ "$tmp" != " 0x2" ]; then
	echo "Error: Unexpected configuration flags: $tmp; expected 0x2."
	exit 1
fi

# Shut the TPM down
exec 100>&-
run_swtpm_ioctl "${SWTPM_INTERFACE}" -s

echo "Test 1: Ok"

# Start the vTPM again and load the encrypted volatile state into it
rm -f "${logfile}"
TPM_PATH=$TPM_PATH run_swtpm "${SWTPM_INTERFACE}" \
	--log "file=${logfile}" \
	--tpm2 \
	--migration-key "pwdfile=$migpwdfile,remove=false,kdf=sha512"

display_processes_by_name "$SWTPM"

if ! kill_quiet -0 "${SWTPM_PID}"; then
	echo "Error: ${SWTPM_INTERFACE} TPM did not start."
	exit 1
fi

run_swtpm_ioctl "${SWTPM_INTERFACE}" --stop

# Do NOT init the TPM now; first load volatile state

# load the encrypted volatile state into it
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" --load volatile "$volatilestatefile"; then
	echo "Error: Could not load encrypted volatile state into TPM."
	echo "swtpm logfile: "
	cat "$logfile"
	exit 1
fi

# Now init the TPM
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -i; then
	echo "Error: Initializing the ${SWTPM_INTERFACE} TPM failed."
	exit 1
fi

# Read PCR 10
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b\x03\x00\x04\x00' 100)
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 16 00 00 00 01 00 0b 03 00 04 00 00 00 00 01 00 20 f6 85 98 e5 86 8d e6 8b 97 29 99 60 f2 71 7d 17 67 89 a4 2f 9a ae a8 c7 b7 aa 79 a8 62 56 c1 de'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM_PCRRead(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Shut the TPM down
exec 100>&-
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -s; then
	echo "Error: Could not shut down the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

echo "Test 2: Ok"

# Start the vTPM again and load the encrypted volatile state into it
# This time we make this fail since we don't provide the migration key
rm -f "${logfile}"
TPM_PATH=$TPM_PATH run_swtpm "${SWTPM_INTERFACE}" \
	--log "file=${logfile}" \
	--tpm2

display_processes_by_name "$SWTPM"

if ! kill_quiet -0 "${SWTPM_PID}"; then
	echo "Error: ${SWTPM_INTERFACE} TPM did not start."
	exit 1
fi

# Do NOT init the TPM now; first load volatile state

run_swtpm_ioctl "${SWTPM_INTERFACE}" --stop

# load the encrypted volatile state into it
# This will not work; the TPM writes the data into the volatile state file
# and validates it
if ERR="$(run_swtpm_ioctl "${SWTPM_INTERFACE}" --load volatile "$volatilestatefile" 2>&1)"; then
	echo "Error: Could load encrypted volatile state into TPM."
	cat "$logfile"
	exit 1
fi
exp="TPM result from PTM_SET_STATEBLOB: 0xd"
if [ "$ERR" != "$exp" ]; then
	echo "Error: Unexpected error message"
	echo "Received: $ERR"
	echo "Expected: $exp"
	exit 1
fi

if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -s; then
	echo "Error: Could not shut down the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

rm -f "${TPM_PATH}/tpm2-00.volatilestate"

echo "Test 3: Ok"

# In this test we now feed it an encrypted volatile state

# Start the vTPM again and load the encrypted volatile state into it
rm -f "${logfile}"
TPM_PATH=$TPM_PATH run_swtpm "${SWTPM_INTERFACE}" \
	--log "file=${logfile}" \
	--tpm2 \
	--migration-key "pwdfile=$migpwdfile,remove=true,kdf=sha512"

display_processes_by_name "$SWTPM"

if ! kill_quiet -0 "${SWTPM_PID}"; then
	echo "Error: TPM did not start."
	cat "$logfile"
	exit 1
fi

run_swtpm_ioctl "${SWTPM_INTERFACE}" --stop

# load the encrypted volatile state into it
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" --load volatile "$VOLATILESTATE"; then
	echo "Error: Could not load encrypted volatile state into TPM."
	exit 1
fi

# Now init the TPM; this must work
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -i; then
	echo "Error: Could not initialize the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

# Read PCR 10
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b\x03\x00\x04\x00' 100)
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 16 00 00 00 01 00 0b 03 00 04 00 00 00 00 01 00 20 f6 85 98 e5 86 8d e6 8b 97 29 99 60 f2 71 7d 17 67 89 a4 2f 9a ae a8 c7 b7 aa 79 a8 62 56 c1 de'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM_PCRRead(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Shut the TPM down
exec 100>&-
if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -s; then
	echo "Error: Could not shut down the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

echo "Test 4: Ok"