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Armin Kuster
83 lines
3.4 KiB
Python
83 lines
3.4 KiB
Python
#!/usr/bin/env python
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#
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# Authors: Cristina Moraru <cristina.moraru@intel.com>
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# Alexandru Cornea <alexandru.cornea@intel.com>
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import unittest
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import string
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from time import sleep
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from oeqa.oetest import oeRuntimeTest, skipModule
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from oeqa.utils.decorators import *
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@tag(TestType = 'FVT', FeatureID = 'IOTOS-617,IOTOS-619')
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class IMACheck(oeRuntimeTest):
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def test_ima_before_systemd(self):
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''' Test if IMA policy is loaded before systemd starts'''
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ima_search = "IMA: policy update completed"
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systemd_search = "systemd .* running"
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status, output = self.target.run("dmesg | grep -n '%s'" %ima_search)
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self.assertEqual( status, 0, "Did not find '%s' in dmesg" %ima_search)
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ima_id = int(output.split(":")[0])
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status, output = self.target.run("dmesg | grep -n '%s'" %systemd_search)
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self.assertEqual(status, 0, "Did not find '%s' in dmesg" %systemd_search)
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init_id = int(output.split(":")[0])
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if ima_id > init_id:
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self.fail("IMA does not start before systemd")
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def test_ima_hash(self):
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''' Test if IMA stores correct file hash '''
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filename = "/etc/filetest"
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ima_measure_file = "/sys/kernel/security/ima/ascii_runtime_measurements"
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status, output = self.target.run("echo test > %s" %filename)
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self.assertEqual(status, 0, "Cannot create file %s on target" %filename)
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# wait for the IMA system to update the entry
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maximum_tries = 30
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tries = 0
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status, output = self.target.run("sha1sum %s" %filename)
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current_hash = output.split()[0]
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ima_hash = ""
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while tries < maximum_tries:
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status, output = self.target.run("cat %s | grep %s" \
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%(ima_measure_file, filename))
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# get last entry, 4th field
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if status == 0:
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tokens = output.split("\n")[-1].split()[3]
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ima_hash = tokens.split(":")[1]
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if ima_hash == current_hash:
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break
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tries += 1
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sleep(1)
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# clean target
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self.target.run("rm %s" %filename)
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if ima_hash != current_hash:
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self.fail("Hash stored by IMA does not match actual hash")
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def test_ima_signature(self):
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''' Test if IMA stores correct signature for system binaries'''
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locations = ["/bin", "/usr/bin"]
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binaries = []
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for l in locations:
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status, output = self.target.run("find %s -type f" %l)
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binaries.extend(output.split("\n"))
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for b in binaries:
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status, output = self.target.run("evmctl ima_verify %s" %b)
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if "Verification is OK" not in output:
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self.fail("IMA signature verification fails for file %s" %b)
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def test_ima_overwrite(self):
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''' Test if IMA prevents overwriting signed files '''
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status, output = self.target.run("find /bin -type f")
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self.assertEqual(status, 0 , "ssh to device fail: %s" %output)
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signed_file = output.strip().split()[0]
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print("\n signed_file is %s" % signed_file)
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status, output = self.target.run(" echo 'foo' >> %s" %signed_file)
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self.assertNotEqual(status, 0 , "Signed file could be written")
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self.assertIn("Permission denied", output,
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"Did not find expected error message. Got: %s" %output)
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