#!/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-hashing"
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}

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}"

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

# 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

# Check the TPM Established bit before the hashing
RES=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -e)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the TPM Established flag."
	exit 1
fi
exp='tpmEstablished is 0'
if [ "$RES" != "$exp" ]; then
	echo "Error (1): TPM Established flag has wrong value."
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

run_swtpm_ioctl "${SWTPM_INTERFACE}" -h 1234
if [ $? -ne 0 ]; then
	echo "Error: Hash command did not work."
	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

# Check the TPM Established bit after the hashing
RES=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -e)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the TPM Established flag."
	exit 1
fi
exp='tpmEstablished is 1'
if [ "$RES" != "$exp" ]; then
	echo "Error (2): TPM Established flag has wrong value."
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Reset the establishment bit via locality 3
run_swtpm_ioctl "${SWTPM_INTERFACE}" -l 3
if [ $? -ne -0 ]; then
	echo "Error: Could not set locality 3"
	exit 1
fi

# \x40 or \x0B seems to confuse 'normal' echo
RES=$(swtpm_cmd_tx "${SWTPM_INTERFACE}" '\x00\xC1\x00\x00\x00\x0A\x40\x00\x00\x0B')
exp=' 00 c4 00 00 00 0a 00 00 00 00'
if [ "$RES" != "$exp" ]; then
	echo "Error: Could not reset the establishment bit"
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# Check the TPM Established bit after the reset
RES=$(run_swtpm_ioctl "${SWTPM_INTERFACE}" -e)
if [ $? -ne 0 ]; then
	echo "Error: Could not get the TPM Established flag."
	exit 1
fi
exp='tpmEstablished is 0'
if [ "$RES" != "$exp" ]; then
	echo "Error (3): TPM Established flag has wrong value."
	echo "expected: $exp"
	echo "received: $RES"
	exit 1
fi

# back to locality 0
run_swtpm_ioctl "${SWTPM_INTERFACE}" -l 0
if [ $? -ne 0 ]; then
	echo "Error: Could not set locality 0."
	exit 1
fi

# Read from a file
dd if=/dev/zero bs=1024 count=1024 2>/dev/null| \
	run_swtpm_ioctl "${SWTPM_INTERFACE}" -h -

# 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 d8 0e 7a 7b 3c 37 88 7d b4 c2 88 08 1d a7 53 f6 4b 11 3a 9c'
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

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