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#!/usr/bin/python3-dbg
# -*- coding: utf-8 -*-
# Tests minimalistes pour valider l'intégration des contenus restreints
# depuis Python.
from chrysacase import ChrysalideTestCase
from pychrysalide.analysis.contents import FileContent, RestrictedContent
from pychrysalide.arch import vmpa, mrange
import tempfile
class TestRestrictedContent(ChrysalideTestCase):
"""TestCase for analysis.contents.RestrictedContent."""
@classmethod
def setUpClass(cls):
super(TestRestrictedContent, cls).setUpClass()
cls._out = tempfile.NamedTemporaryFile()
cls._out.write(b'\x01\x02\x03\x04')
cls._out.write(b'\x05\x06\x07\x08')
cls._out.write(b'\x11\x12\x13\x14')
cls._out.write(b'\x15\x16\x17\x18')
cls._out.write(b'\x21\x22\x23\x24')
cls._out.write(b'\x25\x26\x27\x28')
cls._out.write(b'\x31\x32\x33\x34')
cls._out.write(b'\x35\x36\x37\x38')
cls._out.flush()
cls.log('Using temporary file "%s"' % cls._out.name)
@classmethod
def tearDownClass(cls):
super(TestRestrictedContent, cls).tearDownClass()
cls.log('Delete file "%s"' % cls._out.name)
cls._out.close()
def testReadAccess(self):
"""Check valid accesses to restricted content."""
fcnt = FileContent(self._out.name)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
covered = mrange(start, 12) # 0x15 ... 0x28
rcnt = RestrictedContent(fcnt, covered)
self.assertIsNotNone(rcnt)
val = rcnt.read_u8(start)
self.assertEqual(val, b'\x15')
val = rcnt.read_u8(start)
self.assertEqual(val, b'\x16')
val = rcnt.read_u16(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x17\x18')
val = rcnt.read_u32(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x21\x22\x23\x24')
def testBorderLineAccess(self):
"""Check valid border line accesses to restricted content."""
fcnt = FileContent(self._out.name)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
covered = mrange(start, 12) # 0x15 ... 0x28
rcnt = RestrictedContent(fcnt, covered)
self.assertIsNotNone(rcnt)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u8(start)
self.assertEqual(val, b'\x15')
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u16(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x15\x16')
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u32(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x15\x16\x17\x18')
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u64(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x15\x16\x17\x18\x21\x22\x23\x24')
start = vmpa(23, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u8(start)
self.assertEqual(val, b'\x28')
start = vmpa(22, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u16(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x27\x28')
start = vmpa(20, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u32(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x25\x26\x27\x28')
start = vmpa(16, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u64(start, vmpa.SRE_LITTLE)
self.assertEqual(val, b'\x21\x22\x23\x24\x25\x26\x27\x28')
def testWrongAccess(self):
"""Check invalid accesses to restricted content."""
fcnt = FileContent(self._out.name)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
covered = mrange(start, 12) # 0x15 ... 0x28
rcnt = RestrictedContent(fcnt, covered)
self.assertIsNotNone(rcnt)
with self.assertRaisesRegex(Exception, 'Invalid read access.'):
start = vmpa(1, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u8(start)
with self.assertRaisesRegex(Exception, 'Invalid read access.'):
start = vmpa(11, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u16(start, vmpa.SRE_LITTLE)
with self.assertRaisesRegex(Exception, 'Invalid read access.'):
start = vmpa(23, vmpa.VMPA_NO_VIRTUAL)
val = rcnt.read_u16(start, vmpa.SRE_LITTLE)
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