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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 import SourceEndian
from pychrysalide.analysis import BinContent
from pychrysalide.analysis.contents import FileContent
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.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u16(start, SourceEndian.LITTLE_WORD)
self.assertEqual(val, 0x1516)
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u16(start, SourceEndian.BIG_WORD)
self.assertEqual(val, 0x1615)
# 32 bits
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u32(start, SourceEndian.LITTLE_WORD)
self.assertEqual(val, 0x17181516)
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u32(start, SourceEndian.BIG_WORD)
self.assertEqual(val, 0x16151817)
# 64 bits
start = vmpa(0, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u64(start, SourceEndian.LITTLE_WORD)
self.assertEqual(val, 0x0708050603040102)
start = vmpa(0, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u64(start, SourceEndian.BIG_WORD)
self.assertEqual(val, 0x0201040306050807)
def testEndianness(self):
"""Test usual endianness."""
fcnt = FileContent(self._out.name)
# 16 bits
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u16(start, SourceEndian.LITTLE)
self.assertEqual(val, 0x1615)
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u16(start, SourceEndian.BIG)
self.assertEqual(val, 0x1516)
# 32 bits
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u32(start, SourceEndian.LITTLE)
self.assertEqual(val, 0x18171615)
start = vmpa(12, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u32(start, SourceEndian.BIG)
self.assertEqual(val, 0x15161718)
# 64 bits
start = vmpa(0, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u64(start, SourceEndian.LITTLE)
self.assertEqual(val, 0x0807060504030201)
start = vmpa(0, vmpa.VmpaSpecialValue.NO_VIRTUAL)
val = fcnt.read_u64(start, SourceEndian.BIG)
self.assertEqual(val, 0x0102030405060708)
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