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#!/usr/bin/env python
#
# Authors: Cristina Moraru <cristina.moraru@intel.com>
# Alexandru Cornea <alexandru.cornea@intel.com>
import unittest
import string
from time import sleep
from oeqa.oetest import oeRuntimeTest, skipModule
from oeqa.utils.decorators import *
@tag(TestType = 'FVT', FeatureID = 'IOTOS-617,IOTOS-619')
class IMACheck(oeRuntimeTest):
def test_ima_before_systemd(self):
''' Test if IMA policy is loaded before systemd starts'''
ima_search = "IMA: policy update completed"
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")
def test_ima_hash(self):
''' Test if IMA stores correct file hash '''
filename = "/etc/filetest"
ima_measure_file = "/sys/kernel/security/ima/ascii_runtime_measurements"
status, output = self.target.run("echo test > %s" %filename)
self.assertEqual(status, 0, "Cannot create file %s on target" %filename)
# wait for the IMA system to update the entry
maximum_tries = 30
tries = 0
status, output = self.target.run("sha1sum %s" %filename)
current_hash = output.split()[0]
ima_hash = ""
while tries < maximum_tries:
status, output = self.target.run("cat %s | grep %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")
def test_ima_signature(self):
''' Test if IMA stores correct signature for system binaries'''
locations = ["/bin", "/usr/bin"]
binaries = []
for l in locations:
status, output = self.target.run("find %s -type f" %l)
binaries.extend(output.split("\n"))
for b in binaries:
status, output = self.target.run("evmctl ima_verify %s" %b)
if "Verification is OK" not in output:
self.fail("IMA signature verification fails for file %s" %b)
def test_ima_overwrite(self):
''' Test if IMA prevents overwriting signed files '''
status, output = self.target.run("find /bin -type f")
self.assertEqual(status, 0 , "ssh to device fail: %s" %output)
signed_file = output.strip().split()[0]
print("\n signed_file is %s" % signed_file)
status, output = self.target.run(" echo 'foo' >> %s" %signed_file)
self.assertNotEqual(status, 0 , "Signed file could be written")
self.assertIn("Permission denied", output,
"Did not find expected error message. Got: %s" %output)
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