/usr/lib/python2.7/dist-packages/rekall/obj_test.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import unittest
from rekall import addrspace
from rekall import obj
# Import and register all the plugins.
from rekall import plugins # pylint: disable=unused-import
from rekall import session
from rekall import testlib
class ProfileTest(testlib.RekallBaseUnitTestCase):
"""Test the profile implementation."""
def setUp(self):
self.session = session.Session()
# Create an address space from a buffer for testing
self.address_space = addrspace.BufferAddressSpace(
data="hello world" * 100, session=self.session)
def testNativeTypes(self):
# We build a simple profile with just the native types here.
profile = obj.Profile.classes['Profile32Bits'](session=self.session)
# Check that simple types work
self.assertEqual(
profile.Object("long", offset=0, vm=self.address_space),
0x6c6c6568)
self.assertEqual(
profile.Object("long long", offset=0, vm=self.address_space),
0x6f77206f6c6c6568)
def testBitField(self):
# We build a simple profile with just the native types here.
profile = obj.Profile.classes['Profile32Bits'](session=self.session)
profile.add_types({
'Test': [0x10, {
'Field1': [0x00, ['BitField', dict(start_bit=0, end_bit=4)]],
'Field2': [0x00, ['BitField', dict(start_bit=4, end_bit=8)]],
}]})
test = profile.Object("Test", offset=0, vm=self.address_space)
bf1 = test.Field1
bf2 = test.Field2
self.assertEqual(bf1, 8)
self.assertEqual(bf2, 6)
# Check for overloaded numeric methods.
self.assertEqual(bf1 + 1, 9)
self.assertEqual(bf1 - 1, 7)
self.assertEqual(bf1 + bf2, 8 + 6)
self.assertEqual(bf1 < bf2, 8 < 6)
self.assertEqual(bf1 > bf2, 8 > 6)
self.assertEqual(bf1 & bf2, 8 & 6)
self.assertEqual(bf1 ^ bf2, 8 ^ 6)
self.assertEqual(bf1 + 6, 8 + bf2)
self.assertEqual(bf1 < 6, 8 < bf2)
self.assertEqual(bf1 > 6, 8 > bf2)
self.assertEqual(bf1 & 6, 8 & bf2)
self.assertEqual(bf1 ^ 6, 8 ^ bf2)
def testPointer(self):
# Create an address space from a buffer for testing
address_space = addrspace.BufferAddressSpace(
data="\x08\x00\x00\x00\x00\x00\x00\x00"
"\x66\x55\x44\x33\x00\x00\x00\x00"
"\x99\x88\x77\x66\x55\x44\x33\x22", session=self.session)
vtype = {'Test': [0x10, {
# Check simple type dereferencing
'ptr32': [0x00, ['Pointer', dict(
target='unsigned long'
)]],
'ptr64': [0x00, ['Pointer', dict(
target='long long'
)]],
# Check struct dereferencing
'next': [0x00, ['Pointer', dict(
target='Test'
)]],
# A pointer to an invalid location
'invalid': [0x08, ['Pointer', dict(
target='long'
)]],
# A void pointer
'void': [0x00, ['Pointer', dict(
target='Void'
)]],
}]}
# We build a simple profile with just the native types here.
profile = obj.Profile.classes['Profile32Bits'](session=self.session)
profile.add_types(vtype)
test = profile.Object("Test", offset=0, vm=address_space)
ptr = test.ptr32
# Can we check the offset of members?
self.assertEqual(profile.get_obj_offset("Test", "invalid"), 8)
# 32 bit pointers.
self.assertEqual(ptr.obj_size, 4)
# The pointer itself is at location 0.
self.assertEqual(ptr.obj_offset, 0)
# But is pointing to location 8.
self.assertEqual(ptr.v(), 8)
self.assertEqual(int(ptr), 8)
self.assertEqual(ptr, 8)
# The long is the next 8 bytes.
self.assertEqual(ptr.dereference(), 0x33445566)
# Pointer comparison
self.assertEqual(test.ptr32, test.ptr64)
# We could do pointer arithmetic.
ptr2 = ptr + 2
# The new pointer is at location 8 (its 32 bits).
self.assertEqual(ptr2.obj_offset, 8)
# The pointer to long long is moving twice as fast
self.assertEqual(test.ptr64 + 1, 0x33445566)
self.assertEqual(test.ptr32 + 1, 0)
# And its pointing to.
self.assertEqual(ptr2.v(), 0x33445566)
# The above makes the pointer invalid, so dereferencing it returns a 0.
# (This is because there is no good way to validate pages except at
# system runtime.)
self.assertEqual(ptr2.dereference(), 0)
# This is also invalid and will return a zero.
self.assertEqual(test.invalid.dereference(), 0)
# Test nonzero.
self.assert_(test.ptr32)
# Now dereference a struct.
ptr3 = test.next
# This struct starts at offset 8.
self.assertEqual(test.next.v(), 8)
next = ptr3.dereference()
# We get another struct from this.
self.assertEqual(next.obj_type, "Test")
# This new struct's ptr32 is pointing at this address now.
self.assertEqual(next.ptr32, 0x33445566)
# Now test 64 bit pointers.
profile = obj.Profile.classes['ProfileLLP64'](session=self.session)
profile.add_types(vtype)
test = profile.Object("Test", offset=0, vm=address_space)
ptr = test.ptr32
# 64 bit pointers.
self.assertEqual(ptr.obj_size, 8)
# The pointer itself is at location 0.
self.assertEqual(ptr.obj_offset, 0)
# But is pointing to location 8.
self.assertEqual(ptr.v(), 8)
# The long is the next 8 bytes.
self.assertEqual(ptr.dereference(), 0x33445566)
# We could do pointer arithmetic.
ptr2 = ptr + 2
# This will advance the pointer by 8 bytes (still pointer to long).
self.assertEqual(ptr2.obj_offset, 8)
self.assertEqual(ptr2, 0x33445566)
# NOTE: We assume that long is 32 bits wide in both 64 bits and 32 bits
# mode - which is the way windows does it. This is not the same as linux
# which has long being the bit size in both cases.
# Test the void pointer
self.assertEqual(test.void, 8)
# A Void object can not be compared to anything!
self.assertNotEqual(test.void.dereference(), 0x33445566)
def testArray(self):
# Create an address space from a buffer for testing
address_space = addrspace.BufferAddressSpace(
data="abcdefghijklmnopqrstuvwxyz", session=self.session)
profile = obj.Profile.classes['Profile32Bits'](session=self.session)
test = profile.Object("Array", vm=address_space, offset=0,
target="int", count=0)
self.assertEqual(test[0], 0x64636261)
self.assertEqual(test[1], 0x68676665)
# Can read past the end of the array but this returns all zeros.
self.assertEqual(test[100], 0)
if __name__ == "__main__":
logging.basicConfig(level=logging.DEBUG)
unittest.main()
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