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#!/usr/bin/env python3
import os
import unittest
from struct import calcsize, pack, unpack
from androguard.session import Session
test_dir = os.path.dirname(os.path.abspath(__file__))
TEST_CASE = os.path.join(test_dir, 'data/APK/classes.dex')
VALUES = {
'Ltests/androguard/TestActivity; testDouble ()V': [
('<d', -5),
('<d', -4),
('<d', -3),
('<d', -2),
('<d', -1),
('<d', 0),
('<d', 1),
('<d', 2),
('<d', 3),
('<d', 4),
('<d', 5),
('<l', -5),
('<l', -4),
('<l', -3),
('<l', -2),
('<l', -1),
('<l', 0),
('<l', 1),
('<l', 2),
('<l', 3),
('<l', 4),
('<l', 5),
('<f', -5),
('<f', -4),
('<f', -3),
('<f', -2),
('<f', -1),
('<f', 0),
('<f', 1),
('<f', 2),
('<f', 3),
('<f', 4),
('<f', 5),
('<d', 65534),
('<d', 65535),
('<d', 65536),
('<d', 65537),
('<d', 32769),
('<d', 32768),
('<d', 32767),
('<d', 32766),
('<l', 65534),
('<l', 65535),
('<l', 65536),
('<l', 65537),
('<l', 32769),
('<l', 32768),
('<l', 32767),
('<l', 32766),
('<f', 65534),
('<f', 65535),
('<f', 65536),
('<f', 65537),
('<f', 32769),
('<f', 32768),
('<f', 32767),
('<f', 32766),
('<d', 5346952),
('<l', 5346952),
('<f', 5346952),
('<d', 65534.50),
('<d', 65535.50),
('<d', 65536.50),
('<d', 65537.50),
('<d', 32769.50),
('<d', 32768.50),
('<d', 32767.50),
('<d', 32766.50),
('<f', 65534.50),
('<f', 65535.50),
('<f', 65536.50),
('<f', 65537.50),
('<f', 32769.50),
('<f', 32768.50),
('<f', 32767.50),
('<f', 32766.50),
('<f', -5),
('<f', -65535),
('<f', -65536),
# ('<f', -123456789123456789.555555555), --> this value will be -123456790519087104 as float!
('<f', -123456790519087104),
('<d', -123456789123456789.555555555),
# int boom
('<i', -606384730),
# float reboom
('<f', -123456790519087104),
# not in the java file, but appears due to the calculation: boom again
# but the two is added already -> some compiler optimization
('<i', -606384730 + 2),
# the 3.5 from the calculation
('<f', 3.5),
],
}
def format_value(literal, ins, to):
# Need to convert the instruction (which is always signed)
# to the requested format.
formats = dict(i='i', h='i', l='q', s='h')
char = ins.__class__.__name__[-1]
if char not in formats:
raise ValueError("wrong type of instruction")
# Special treatment for const/high16 and const-wide/high16
if char == 'h' and 'wide' in ins.get_name():
formats['h'] = 'q'
# Need to calculate for extra padding bytes
# if the number is negative, trailing \xff are added (sign extension)
packed = pack('<{}'.format(formats[char]), literal)
padding = bytearray()
trailing = bytearray()
if to == '<l' and packed[-1] & 0x80 == 0x80:
# Sign extension
trailing = bytearray([0xFF] * (calcsize(to) - calcsize(formats[char])))
elif to == '<l' and packed[-1] & 0x80 == 0x00:
# no sign extension, but requires zero trailing
trailing = bytearray([0] * (calcsize(to) - calcsize(formats[char])))
else:
padding = bytearray([0] * (calcsize(to) - calcsize(formats[char])))
# print(ins.__class__.__name__, char, formats[char], to, padding, trailing, literal)
return unpack(to, padding + packed + trailing)[0]
class TypesTest(unittest.TestCase):
def testTypes(self):
s = Session()
with open(TEST_CASE, "rb") as fd:
digest, d, dx = s.addDEX(TEST_CASE, fd.read())
for method in filter(
lambda x: x.full_name in VALUES, d.get_encoded_methods()
):
# print("METHOD", method.full_name)
for i in filter(
lambda x: 'const' in x.get_name(), method.get_instructions()
):
i.show(0)
# ins should only have one literal
self.assertEqual(len(i.get_literals()), 1)
fmt, value = VALUES[method.full_name].pop(0)
converted = format_value(i.get_literals()[0], i, fmt)
# print(i.get_literals(), fmt, value, converted)
self.assertEqual(converted, value)
# print()
if __name__ == '__main__':
unittest.main()
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