#!/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-tpm2-setbuffersize"
SWTPM_DEV_NAME="/dev/${VTPM_NAME}"
export TPM_PATH=$(mktemp -d)
STATE_FILE=$TPM_PATH/tpm2-00.permall
OUTFILE=$TPM_PATH/output
VOLATILE_STATE_FILE=$TPM_PATH/tpm2-00.volatilestate
SWTPM_CMD_UNIX_PATH=${TPM_PATH}/unix-cmd.sock
SWTPM_CTRL_UNIX_PATH=${TPM_PATH}/unix-ctrl.sock
SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}

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} --tpm2

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

# Check the buffer size
run_swtpm_ioctl ${SWTPM_INTERFACE} -b 0 > ${OUTFILE}
if [ $? -ne 0 ]; then
	echo "Error: Could not get the buffersize of the ${SWTPM_INTERFACE} TPM."
	exit 1
fi
cat ${OUTFILE}

if [ -z "$(grep "TPM buffersize" ${OUTFILE} | grep 4096)" ]; then
	echo "Error: The TPM buffersize of the ${SWPTM_INTERFACE} TPM is not 4096."
	exit 1
fi

# set the buffer size -- it's not going to change but command must not fail
run_swtpm_ioctl ${SWTPM_INTERFACE} -b 4000 > ${OUTFILE}
if [ $? -ne 0 ]; then
	echo "Error: Could not set the buffersize of the ${SWTPM_INTERFACE} TPM."
	exit 1
fi
cat ${OUTFILE}

if [ -z "$(grep "TPM buffersize" ${OUTFILE} | grep 4000)" ]; then
	echo "Error: Could not set the buffersize of the ${SWPTM_INTERFACE} TPM to 4000."
	exit 1
fi

# Init the TPM
run_swtpm_ioctl ${SWTPM_INTERFACE} -i
if [ $? -ne 0 ]; then
	echo "Error: Could not initialize the ${SWTPM_INTERFACE} TPM."
	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."
	exit 1
fi

# Set the buffer size -- should fail
ERR="$(run_swtpm_ioctl ${SWTPM_INTERFACE} -b 4096 2>&1)"
if [ $? -eq 0 ]; then
	echo "Error: Could set the buffersize while the ${SWTPM_INTERFACE} TPM is running."
	exit 1
fi
exp="TPM result from PTM_SET_BUFFERSIZE: 0xa"
if [ "$ERR" != "$exp" ]; then
	echo "Error: Unexpected error message"
	echo "Received: $ERR"
	echo "Expected: $exp"
	exit 1
fi

# Startup the TPM2
swtpm_open_cmddev ${SWTPM_INTERFACE} 100
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00')
exp=' 80 01 00 00 00 0a 00 00 00 00'
if [ "$RES" != "$exp" ]; then
	echo "Error: Did not get expected result from TPM2_Startup(SU_Clear)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Read the Buffer sizes; we want to see '4000' (0xfa0) in the buffer sizes now
swtpm_open_cmddev ${SWTPM_INTERFACE} 100
RES=$(swtpm_cmd_tx ${SWTPM_INTERFACE} '\x80\x01\x00\x00\x00\x16\x00\x00\x01\x7a\x00\x00\x00\x06\x00\x00\x01\x1e\x00\x00\x00\x02')
exp=' 80 01 00 00 00 23 00 00 00 00 01 00 00 00 06 00 00 00 02 00 00 01 1e 00 00 0f a0 00 00 01 1f 00 00 0f a0'
if [ "$RES" != "$exp" ]; then
	echo "Error: Did not get expected result from TPM2_GetCapability()"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

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

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

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

echo "OK"

exit 0