#!/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-test-encrypted-state"
SWTPM_DEV_NAME="/dev/${VTPM_NAME}"
export TPM_PATH="$(mktemp -d)" || exit 1
STATE_FILE=$TPM_PATH/tpm-00.permall
VOLATILE_STATE_FILE=$TPM_PATH/tpm-00.volatilestate
KEY=1234567890abcdef1234567890abcdef
BINKEY='\x12\x34\x56\x78\x90\xab\xcd\xef\x12\x34\x56\x78\x90\xab\xcd\xef'
SWTPM_CMD_UNIX_PATH=${TPM_PATH}/unix-cmd.sock
SWTPM_CTRL_UNIX_PATH=${TPM_PATH}/unix-ctrl.sock
SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}

keyfile=${TPM_PATH}/keyfile
logfile=${TPM_PATH}/logfile
binkeyfile=${TPM_PATH}/binkeyfile
echo "$KEY" > ${keyfile}
echo -en "$BINKEY" > ${binkeyfile}

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

trap "cleanup" EXIT

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

rm -f $STATE_FILE $VOLATILE_STATE_FILE 2>/dev/null

run_swtpm ${SWTPM_INTERFACE} \
	--key file=$keyfile,mode=aes-cbc,format=hex,remove \
	--log file=$logfile

display_processes_by_name "$SWTPM"

kill_quiet -0 ${SWTPM_PID}
if [ $? -ne 0 ]; then
	echo "Error: ${SWTPM_INTERFACE} TPM did not start."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if wait_file_gone ${keyfile} 4; then
	echo "Error: Keyfile $keyfile was not removed by ${SWTPM_INTERFACE} tpm."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Init the TPM
run_swtpm_ioctl ${SWTPM_INTERFACE} -i
if [ $? -ne 0 ]; then
	echo "Error: ${SWTPM_INTERFACE} TPM initialization failed."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

kill_quiet -0 ${SWTPM_PID} 2>/dev/null
if [ $? -ne 0 ]; then
	echo "Error: ${SWTPM_INTERFACE} TPM not running anymore after INIT."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Startup the TPM
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x00\xC1\x00\x00\x00\x0C\x00\x00\x00\x99\x00\x01')
exp=' 00 c4 00 00 00 0a 00 00 00 00'
if [ "$RES" != "$exp" ]; then
	echo "Error: Did not get expected result from TPM_Startup(ST_Clear)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

run_swtpm_ioctl ${SWTPM_INTERFACE} -h 1234
if [ $? -ne 0 ]; then
	echo "Error: Hash command did not work."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Read PCR 17
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x00\xC1\x00\x00\x00\x0E\x00\x00\x00\x15\x00\x00\x00\x11')
exp=' 00 c4 00 00 00 1e 00 00 00 00 97 e9 76 e4 f2 2c d6 d2 4a fd 21 20 85 ad 7a 86 64 7f 2a e5'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM_PCRRead(17)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Save the volatile state
run_swtpm_ioctl ${SWTPM_INTERFACE} -v
if [ $? -ne 0 ]; then
	echo "Error: Saving the volatile state failed."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if [ ! -r $VOLATILE_STATE_FILE ]; then
	echo "Error: Volatile state file $VOLATILE_STATE_FILE does not exist."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

tmp=$(run_swtpm_ioctl ${SWTPM_INTERFACE} -g | cut -d":" -f2)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the configration flags of the ${SWTPM_INTERFACE} TPM."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if [ "$tmp" != " 0x1" ]; then
	echo "Error: Unexpected configuration flags: $tmp; expected 0x1."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Shut the TPM down
run_swtpm_ioctl ${SWTPM_INTERFACE} -s
if [ $? -ne 0 ]; then
	echo "Error: Could not shut down the ${SWTPM_INTERFACE} TPM."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Start the TPM again; have the keyfile removed
run_swtpm ${SWTPM_INTERFACE} \
	--key file=$binkeyfile,mode=aes-cbc,format=binary,remove \
	--log file=$logfile

display_processes_by_name "$SWTPM"

kill_quiet -0 ${SWTPM_PID}
if [ $? -ne 0 ]; then
	echo "Error (2): ${SWTPM_INTERFACE} TPM did not start."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if wait_file_gone ${binkeyfile} 4; then
	echo "Error: Keyfile $binkeyfile was not removed by ${SWTPM_INTERFACE} tpm."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Init the TPM
run_swtpm_ioctl ${SWTPM_INTERFACE} -i
if [ $? -ne 0 ]; then
	echo "Error: ${SWTPM_INTERFACE} TPM initialization failed."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Volatile state must have been removed by TPM now
if [ -r $VOLATILE_STATE_FILE ]; then
	echo "Error: Volatile state file $VOLATILE_STATE_FILE still exists."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Read the PCR again ...
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x00\xC1\x00\x00\x00\x0E\x00\x00\x00\x15\x00\x00\x00\x11')
exp=' 00 c4 00 00 00 1e 00 00 00 00 97 e9 76 e4 f2 2c d6 d2 4a fd 21 20 85 ad 7a 86 64 7f 2a e5'
if [ "$RES" != "$exp" ]; then
	echo "Error: (2) Did not get expected result from TPM_PCRRead(17)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Save the volatile state again
run_swtpm_ioctl ${SWTPM_INTERFACE} -v
if [ $? -ne 0 ]; then
	echo "Error: Saving the volatile state failed."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if [ ! -r $VOLATILE_STATE_FILE ]; then
	echo "Error: Volatile state file $VOLATILE_STATE_FILE does not exist."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Send a new TPM_Init
run_swtpm_ioctl ${SWTPM_INTERFACE} -i
if [ $? -ne 0 ]; then
	echo "Error: ${SWTPM_INTERFACE} TPM initialization failed."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Volatile state must have been removed by TPM now
if [ -r $VOLATILE_STATE_FILE ]; then
	echo "Error: Volatile state file $VOLATILE_STATE_FILE still exists."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

# Read the PCR again ...
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x00\xC1\x00\x00\x00\x0E\x00\x00\x00\x15\x00\x00\x00\x11')
exp=' 00 c4 00 00 00 1e 00 00 00 00 97 e9 76 e4 f2 2c d6 d2 4a fd 21 20 85 ad 7a 86 64 7f 2a e5'
if [ "$RES" != "$exp" ]; then
	echo "Error: (2) Did not get expected result from TPM_PCRRead(17)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi


# Final shut down
run_swtpm_ioctl ${SWTPM_INTERFACE} -s
if [ $? -ne 0 ]; then
	echo "Error: Could not shut down the ${SWTPM_INTERFACE} TPM."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if wait_process_gone ${SWTPM_PID} 4; then
	echo "Error: ${SWTPM_INTERFACE} TPM should not be running anymore."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

if [ ! -e $STATE_FILE ]; then
	echo "Error: TPM state file $STATE_FILE does not exist."
	echo "TPM Logfile:"
	cat $logfile
	exit 1
fi

echo "OK"

exit 0