#!/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-setbuffersize"
SWTPM_DEV_NAME="/dev/${VTPM_NAME}"
TPM_PATH="$(mktemp -d)" || exit 1
STATE_FILE=$TPM_PATH/tpm-00.permall
VOLATILE_STATE_FILE=$TPM_PATH/tpm-00.volatilestate
SWTPM_CMD_UNIX_PATH=${TPM_PATH}/unix-cmd.sock
SWTPM_CTRL_UNIX_PATH=${TPM_PATH}/unix-ctrl.sock
SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}
OUTFILE=${TPM_PATH}/output

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

TPM_PATH=$TPM_PATH run_swtpm "${SWTPM_INTERFACE}"

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 ${SWTPM_INTERFACE} TPM is not 4096."
	exit 1
fi
                
# set the buffer size
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: The TPM buffersize of the ${SWTPM_INTERFACE} TPM is not 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

# 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

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

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