#!/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-savestate"
SWTPM_DEV_NAME="/dev/${VTPM_NAME}"
TPM_PATH="$(mktemp -d)" || exit 1
STATE_FILE=$TPM_PATH/tpm2-00.permall
VOLATILE_STATE_FILE=$TPM_PATH/tpm2-00.volatilestate
SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}
SWTPM_CMD_UNIX_PATH=${TPM_PATH}/unix-cmd.sock
SWTPM_CTRL_UNIX_PATH=${TPM_PATH}/unix-ctrl.sock

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}" --tpm2

display_processes_by_name "$SWTPM"

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: Could not initialize the ${SWTPM_INTERFACE} TPM."
	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

# Startup the TPM2
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

# Extend PCR 10
req='\x80\x02\x00\x00\x00\x41\x00\x00\x01\x82\x00\x00\x00\x0a\x00\x00'
req+='\x00\x09\x40\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00'
req+='\x0b\x68\x65\x6c\x6c\x6f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
req+='\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
req+='\x00'
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" $req)
exp=' 80 02 00 00 00 13 00 00 00 00 00 00 00 00 00 00 01 00 00'
if [ "$RES" != "$exp" ]; then
	echo "Error: Did not get expected result from TPM2_PCR_Extend(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Read PCR 10
#                         length         CC            count       hashalg         sz
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')
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 15 00 00 00 01 00 0b 03 00 04 00 00 00 00 01 00 20 c3 ba a5 62 69 08 26 72 c3 db 3d 11 0a 10 74 a1 a7 a6 ea 43 e8 82 16 1a af 4b ea a6 83 17 e4 b8'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM2_PCRRead(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Shutdown(SU_STATE)
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x45\x00\x01')
exp=' 80 01 00 00 00 0a 00 00 00 00'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM2_Shutdown(SU_STATE)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

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

# Startup(SU_STATE) the TPM2
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x01')
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_State)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Read PCR 10
#                                                   length         CC            count       hashalg         sz
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')
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 19 00 00 00 01 00 0b 03 00 04 00 00 00 00 01 00 20 c3 ba a5 62 69 08 26 72 c3 db 3d 11 0a 10 74 a1 a7 a6 ea 43 e8 82 16 1a af 4b ea a6 83 17 e4 b8'
if [ "$RES" != "$exp" ]; then
	echo "Error: (2) Did not get expected result from TPM2_PCR_Read(10)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

if ! run_swtpm_ioctl "${SWTPM_INTERFACE}" -s; 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