LIEF/tests/elf/add_section.py

#!/usr/bin/env python
import unittest
import logging
import os
import sys
import stat
import re
import subprocess
import tempfile
import shutil
from subprocess import Popen

import lief
from lief.ELF import Section

from unittest import TestCase
from utils import get_sample

CURRENT_DIRECTORY = os.path.dirname(os.path.abspath(__file__))
STUB = lief.parse(os.path.join(CURRENT_DIRECTORY, "hello_lief.bin"))

class TestAddSection(TestCase):
    def setUp(self):
        self.logger = logging.getLogger(__name__)
        self.tmp_dir = tempfile.mkdtemp(suffix='_lief_test_section')
        self.logger.debug("temp dir: {}".format(self.tmp_dir))


    @unittest.skipUnless(sys.platform.startswith("linux"), "requires Linux")
    def test_simple(self):
        sample_path = get_sample('ELF/ELF64_x86-64_binary_ls.bin')
        output      = os.path.join(self.tmp_dir, "ls.section")

        ls = lief.parse(sample_path)
        section = Section()
        section.name      = "test"
        section.type      = lief.ELF.SECTION_TYPES.PROGBITS
        section.content   = STUB.segments[0].content # First LOAD segment which holds payload
        section.alignment = 8
        section = ls.add_section(section, True)

        ls.header.entrypoint = section.virtual_address + STUB.header.entrypoint

        ls.write(output)

        st = os.stat(output)
        os.chmod(output, st.st_mode | stat.S_IEXEC)

        p = Popen(output, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        stdout, _ = p.communicate()
        self.logger.debug(stdout.decode("utf8"))
        self.assertIsNotNone(re.search(r'LIEF is Working', stdout.decode("utf8")))


    @unittest.skipUnless(sys.platform.startswith("linux"), "requires Linux")
    def test_gcc(self):
        sample_path = get_sample('ELF/ELF64_x86-64_binary_gcc.bin')
        output      = os.path.join(self.tmp_dir, "gcc.section")

        gcc = lief.parse(sample_path)
        section = Section()
        section.name      = "test"
        section.type      = lief.ELF.SECTION_TYPES.PROGBITS
        section.content   = STUB.segments[0].content # First LOAD segment which holds payload
        section.alignment = 8
        section = gcc.add_section(section, True)

        gcc.header.entrypoint = section.virtual_address + STUB.header.entrypoint

        gcc.write(output)

        st = os.stat(output)
        os.chmod(output, st.st_mode | stat.S_IEXEC)

        p = Popen(output, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        stdout, _ = p.communicate()
        self.logger.debug(stdout.decode("utf8"))
        self.assertIsNotNone(re.search(r'LIEF is Working', stdout.decode("utf8")))


    def tearDown(self):
        # Delete it
        if os.path.isdir(self.tmp_dir):
            shutil.rmtree(self.tmp_dir)

if __name__ == '__main__':

    root_logger = logging.getLogger()
    root_logger.setLevel(logging.DEBUG)

    ch = logging.StreamHandler()
    ch.setLevel(logging.DEBUG)
    root_logger.addHandler(ch)

    unittest.main(verbosity=2)