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#!/usr/bin/env python
#
# Authors: Cristina Moraru <cristina.moraru@intel.com>
# Alexandru Cornea <alexandru.cornea@intel.com>
import string
from time import sleep
from oeqa.runtime.case import OERuntimeTestCase
from oeqa.core.decorator.depends import OETestDepends
from oeqa.runtime.decorator.package import OEHasPackage
from oeqa.core.decorator.data import skipIfNotFeature
from oeqa.core.decorator.data import skipIfDataVar, skipIfNotDataVar
import bb
blacklist = ["/usr/bin/uz", "/bin/su.shadow"]
class IMACheck(OERuntimeTestCase):
@classmethod
def setUpClass(cls):
locations = ["/bin", "/usr/bin"]
cls.binaries = []
for l in locations:
status, output = cls.tc.target.run("find %s -type f" % l)
cls.binaries.extend(output.split("\n"))
cls.total = len(cls.binaries)
@OETestDepends(['ssh.SSHTest.test_ssh'])
@skipIfNotFeature('integrity','Test requires "integrity" in DISTRO_FEATURES')
def test_ima_enabled(self):
''' Test if IMA policy is loaded before systemd starts'''
ima_search = "ima: "
systemd_search = "systemd .* running"
status, output = self.target.run("dmesg | grep -n '%s'" % ima_search)
self.assertEqual( status, 0, "Did not find '%s' in dmesg" % ima_search)
@skipIfNotFeature('systemd',
'Test requires systemd to be in DISTRO_FEATURES')
@skipIfNotDataVar('VIRTUAL-RUNTIME_init_manager', 'systemd',
'systemd is not the init manager for this image')
@OETestDepends(['ima.IMACheck.test_ima_enabled'])
def test_ima_before_systemd(self):
''' Test if IMA policy is loaded before systemd starts'''
ima_search = "ima: "
systemd_search = "systemd .* running"
status, output = self.target.run("dmesg | grep -n '%s'" % ima_search)
self.assertEqual( status, 0, "Did not find '%s' in dmesg" % ima_search)
ima_id = int(output.split(":")[0])
status, output = self.target.run("dmesg | grep -n '%s'" % systemd_search)
self.assertEqual(status, 0, "Did not find '%s' in dmesg" % systemd_search)
init_id = int(output.split(":")[0])
if ima_id > init_id:
self.fail("IMA does not start before systemd")
@OETestDepends(['ima.IMACheck.test_ima_enabled'])
def test_ima_hash(self):
''' Test if IMA stores correct file hash '''
filename = "/etc/ld.so.cache"
ima_measure_file = "/sys/kernel/security/ima/ascii_runtime_measurements"
# wait for the IMA system to update the entry
maximum_tries = 3
tries = 0
status, output = self.target.run("sha256sum %s" %filename)
sleep(2)
current_hash = output.split()[0]
ima_hash = ""
while tries < maximum_tries:
status, output = self.target.run("cat %s | grep -e '%s'" \
% (ima_measure_file, filename))
# get last entry, 4th field
if status == 0:
tokens = output.split("\n")[-1].split()[3]
ima_hash = tokens.split(":")[1]
if ima_hash == current_hash:
break
tries += 1
sleep(1)
# clean target
self.target.run("rm %s" % filename)
if ima_hash != current_hash:
self.fail("Hash stored by IMA does not match actual hash")
@OETestDepends(['ima.IMACheck.test_ima_enabled'])
def test_ima_signature(self):
''' Test if IMA stores correct signature for system binaries'''
passed = 0
failed = 0
for b in self.binaries:
if b in blacklist:
continue
status, output = self.target.run("evmctl ima_verify %s" % b)
if status != 0:
failed += 1
else:
passed += 1
if failed == self.total:
self.fail("Signature verifications failed (%s)" % self.total)
#bb.warn("pass: %s, fail: %s, Total: %s" % (passed, failed, total))
@OETestDepends(['ima.IMACheck.test_ima_enabled'])
def test_ima_overwrite(self):
''' Test if IMA prevents overwriting signed files '''
passed = 0
failed = 0
for b in self.binaries:
if b in blacklist:
continue
self.target.run("echo 'foo' >> %s" % b )
status, output = self.target.run("evmctl ima_verify %s" % b)
if status != 0:
failed += 1
else:
passed += 1
if failed == self.total:
self.fail("Overwritting verifications failed (%s)" % self.total)
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