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#!/usr/bin/python3-dbg
# -*- coding: utf-8 -*-
# Tests minimalistes pour valider le boutisme des accès mémoire.
from chrysacase import ChrysalideTestCase
from pychrysalide.analysis.contents import FileContent, RestrictedContent
from pychrysalide.arch import vmpa
import tempfile
class TestEndianness(ChrysalideTestCase):
"""TestCase for analysis.BinContent."""
@classmethod
def setUpClass(cls):
super(TestEndianness, 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(TestEndianness, cls).tearDownClass()
cls.log('Delete file "%s"' % cls._out.name)
cls._out.close()
def testMiddleEndianness(self):
"""Test some old endianness."""
fcnt = FileContent(self._out.name)
# 16 bits
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u16(start, vmpa.SRE_LITTLE_WORD)
self.assertEqual(val, 0x1516)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u16(start, vmpa.SRE_BIG_WORD)
self.assertEqual(val, 0x1615)
# 32 bits
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u32(start, vmpa.SRE_LITTLE_WORD)
self.assertEqual(val, 0x17181516)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u32(start, vmpa.SRE_BIG_WORD)
self.assertEqual(val, 0x16151817)
# 64 bits
start = vmpa(0, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u64(start, vmpa.SRE_LITTLE_WORD)
self.assertEqual(val, 0x0708050603040102)
start = vmpa(0, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u64(start, vmpa.SRE_BIG_WORD)
self.assertEqual(val, 0x0201040306050807)
def testEndianness(self):
"""Test usual endianness."""
fcnt = FileContent(self._out.name)
# 16 bits
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u16(start, vmpa.SRE_LITTLE)
self.assertEqual(val, 0x1615)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u16(start, vmpa.SRE_BIG)
self.assertEqual(val, 0x1516)
# 32 bits
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u32(start, vmpa.SRE_LITTLE)
self.assertEqual(val, 0x18171615)
start = vmpa(12, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u32(start, vmpa.SRE_BIG)
self.assertEqual(val, 0x15161718)
# 64 bits
start = vmpa(0, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u64(start, vmpa.SRE_LITTLE)
self.assertEqual(val, 0x0807060504030201)
start = vmpa(0, vmpa.VMPA_NO_VIRTUAL)
val = fcnt.read_u64(start, vmpa.SRE_BIG)
self.assertEqual(val, 0x0102030405060708)
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