tests/test_tpm2_chroot_chardev

#!/usr/bin/env bash

# For the license, see the LICENSE file in the root directory.

if [ "$(id -u)" -ne 0 ]; then
        echo "Need to be root to run this test."
        exit 77
fi

if [ "$(uname -s)" != "Linux" ]; then
	# Due to using /proc/<pid>/root
	echo "This test only runs only Linux."
	exit 77
fi

ROOT=${abs_top_builddir:-$(dirname "$0")/..}
TESTDIR=${abs_top_testdir:-$(dirname "$0")}

SWTPM=swtpm
SWTPM_EXE=${SWTPM_EXE:-$ROOT/src/swtpm/$SWTPM}
PID_FILE=/${SWTPM}.pid

source ${TESTDIR}/common
source ${TESTDIR}/test_common
skip_test_no_chardev "${SWTPM_EXE}"
skip_test_no_tpm20 "${SWTPM_EXE}"

trap "cleanup" SIGTERM EXIT

function cleanup()
{
	rm -rf $TPMDIR
	if [ -n "$PID" ]; then
		kill_quiet -SIGTERM $PID 2>/dev/null
	fi
}

for OPTION in --chroot -R; do
	TPMDIR="$(mktemp -d)" || exit 1
	mkdir $TPMDIR/dev
	mknod -m 0666 $TPMDIR/dev/urandom c 1 9

	# use a pseudo terminal
	exec 100<>/dev/ptmx
	$SWTPM_EXE chardev \
		--fd 100 \
		"$OPTION" $TPMDIR \
		--tpmstate dir=/ \
		--pid file=$PID_FILE \
		--tpm2 \
		--flags not-need-init \
		${SWTPM_TEST_SECCOMP_OPT} &
	PID=$!

	if wait_for_file $TPMDIR/$PID_FILE 3; then
		echo "Error: Chardev TPM did not write pidfile."
		exit 1
	fi

	validate_pidfile $PID $TPMDIR/$PID_FILE

	if [ "$(readlink /proc/$PID/root)" != $TPMDIR ]; then
		echo "Test 1 failed: Unexpected chroot dir"
		exit 1
	fi

	if [ ! -f ${TPMDIR}/tpm2-00.permall ]; then
		echo "Missing state file"
		exit 1
	fi

	echo "Test $OPTION passed"
	cleanup
done