#!/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-hashing3"
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"

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

# We do NOT need to startup the TPM; Hashing will affect PCR 0

# Check the TPM Established bit before the hashing
RES=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -e)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the TPM Established bit from the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

exp='tpmEstablished is 0'
if [ "$RES" != "$exp" ]; then
	echo "Error (1): TPM Established flag has wrong value."
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Hash
run_swtpm_ioctl "${SWTPM_INTERFACE}" -h 1234
if [ $? -ne 0 ]; then
	echo "Error: The hash command failed."
	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 TPM_Startup(ST_Clear)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Read PCR 0
#                                                     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\x01\x00\x00')
exp=' 80 01 00 00 00 3e 00 00 00 00 00 00 00 14 00 00 00 01 00 0b 03 01 00 00 00 00 00 01 00 20 34 0a 23 3f ac 4c a0 14 98 6e 45 dd 95 ec 77 6a 7a 3f 86 a2 10 74 f4 3a 43 90 c5 b8 c3 ab ea f4'
if [ "$RES" != "$exp" ]; then
	echo "Error: (1) Did not get expected result from TPM_PCRRead(0)"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Check the TPM Established bit after the hashing
RES=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -e)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the TPM Established bit from the ${SWTPM_INTERFACE} TPM."
	exit 1
fi

exp='tpmEstablished is 1'
if [ "$RES" != "$exp" ]; then
	echo "Error (2): TPM Established flag has wrong value."
	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

echo "OK"

exit 0