test_functional.py

#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# SPDX-License-Identifier: Apache-2.0
import os
import sys

import testtools

from bandit.core import config as b_config
from bandit.core import constants as C
from bandit.core import manager as b_manager
from bandit.core import metrics
from bandit.core import test_set as b_test_set


class FunctionalTests(testtools.TestCase):

    """Functional tests for bandit test plugins.

    This set of tests runs bandit against each example file in turn
    and records the score returned. This is compared to a known good value.
    When new tests are added to an example the expected result should be
    adjusted to match.
    """

    def setUp(self):
        super().setUp()
        # NOTE(tkelsey): bandit is very sensitive to paths, so stitch
        # them up here for the testing environment.
        #
        path = os.path.join(os.getcwd(), "bandit", "plugins")
        b_conf = b_config.BanditConfig()
        self.b_mgr = b_manager.BanditManager(b_conf, "file")
        self.b_mgr.b_conf._settings["plugins_dir"] = path
        self.b_mgr.b_ts = b_test_set.BanditTestSet(config=b_conf)

    def run_example(self, example_script, ignore_nosec=False):
        """A helper method to run the specified test

        This method runs the test, which populates the self.b_mgr.scores
        value. Call this directly if you need to run a test, but do not
        need to test the resulting scores against specified values.
        :param example_script: Filename of an example script to test
        """
        path = os.path.join(os.getcwd(), "examples", example_script)
        self.b_mgr.ignore_nosec = ignore_nosec
        self.b_mgr.discover_files([path], True)
        self.b_mgr.run_tests()

    def check_example(self, example_script, expect, ignore_nosec=False):
        """A helper method to test the scores for example scripts.

        :param example_script: Filename of an example script to test
        :param expect: dict with expected counts of issue types
        """
        # reset scores for subsequent calls to check_example
        self.b_mgr.scores = []
        self.run_example(example_script, ignore_nosec=ignore_nosec)

        result = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }

        for test_scores in self.b_mgr.scores:
            for score_type in test_scores:
                self.assertIn(score_type, expect)
                for idx, rank in enumerate(C.RANKING):
                    result[score_type][rank] = (
                        test_scores[score_type][idx] // C.RANKING_VALUES[rank]
                    )

        self.assertDictEqual(expect, result)

    def check_metrics(self, example_script, expect):
        """A helper method to test the metrics being returned.

        :param example_script: Filename of an example script to test
        :param expect: dict with expected values of metrics
        """
        self.b_mgr.metrics = metrics.Metrics()
        self.b_mgr.scores = []
        self.run_example(example_script)

        # test general metrics (excludes issue counts)
        m = self.b_mgr.metrics.data
        for k in expect:
            if k != "issues":
                self.assertEqual(expect[k], m["_totals"][k])
        # test issue counts
        if "issues" in expect:
            for (criteria, default) in C.CRITERIA:
                for rank in C.RANKING:
                    label = f"{criteria}.{rank}"
                    expected = 0
                    if expect["issues"].get(criteria).get(rank):
                        expected = expect["issues"][criteria][rank]
                    self.assertEqual(expected, m["_totals"][label])

    def test_binding(self):
        """Test the bind-to-0.0.0.0 example."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
        }
        self.check_example("binding.py", expect)

    def test_crypto_md5(self):
        """Test the `hashlib.md5` example."""
        if sys.version_info >= (3, 9):
            expect = {
                "SEVERITY": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 10,
                    "HIGH": 9,
                },
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 19,
                },
            }
        else:
            expect = {
                "SEVERITY": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 16,
                    "HIGH": 4,
                },
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 20,
                },
            }
        self.check_example("crypto-md5.py", expect)

    def test_ciphers(self):
        """Test the `Crypto.Cipher` example."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 21},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 22},
        }
        self.check_example("ciphers.py", expect)

    def test_cipher_modes(self):
        """Test for insecure cipher modes."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("cipher-modes.py", expect)

    def test_eval(self):
        """Test the `eval` example."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("eval.py", expect)

    def test_mark_safe(self):
        """Test the `mark_safe` example."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("mark_safe.py", expect)

    def test_exec(self):
        """Test the `exec` example."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("exec.py", expect)

    def test_hardcoded_passwords(self):
        """Test for hard-coded passwords."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 14, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 14, "HIGH": 0},
        }
        self.check_example("hardcoded-passwords.py", expect)

    def test_hardcoded_tmp(self):
        """Test for hard-coded /tmp, /var/tmp, /dev/shm."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
        }
        self.check_example("hardcoded-tmp.py", expect)

    def test_imports_aliases(self):
        """Test the `import X as Y` syntax."""
        if sys.version_info >= (3, 9):
            expect = {
                "SEVERITY": {"UNDEFINED": 0, "LOW": 4, "MEDIUM": 1, "HIGH": 4},
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 9,
                },
            }
        else:
            expect = {
                "SEVERITY": {"UNDEFINED": 0, "LOW": 4, "MEDIUM": 5, "HIGH": 0},
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 9,
                },
            }
        self.check_example("imports-aliases.py", expect)

    def test_imports_from(self):
        """Test the `from X import Y` syntax."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 3, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("imports-from.py", expect)

    def test_imports_function(self):
        """Test the `__import__` function."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("imports-function.py", expect)

    def test_telnet_usage(self):
        """Test for `import telnetlib` and Telnet.* calls."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("telnetlib.py", expect)

    def test_ftp_usage(self):
        """Test for `import ftplib` and FTP.* calls."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("ftplib.py", expect)

    def test_imports(self):
        """Test for dangerous imports."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("imports.py", expect)

    def test_imports_using_importlib(self):
        """Test for dangerous imports using importlib."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 4, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 4},
        }
        self.check_example("imports-with-importlib.py", expect)

    def test_mktemp(self):
        """Test for `tempfile.mktemp`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 4, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 4},
        }
        self.check_example("mktemp.py", expect)

    def test_tempnam(self):
        """Test for `os.tempnam` / `os.tmpnam`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 6, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 6},
        }
        self.check_example("tempnam.py", expect)

    def test_nonsense(self):
        """Test that a syntactically invalid module is skipped."""
        self.run_example("nonsense.py")
        self.assertEqual(1, len(self.b_mgr.skipped))

    def test_okay(self):
        """Test a vulnerability-free file."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }
        self.check_example("okay.py", expect)

    def test_subdirectory_okay(self):
        """Test a vulnerability-free file under a subdirectory."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }
        self.check_example("init-py-test/subdirectory-okay.py", expect)

    def test_os_chmod(self):
        """Test setting file permissions."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 2, "HIGH": 8},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 9},
        }
        self.check_example("os-chmod.py", expect)

    def test_os_exec(self):
        """Test for `os.exec*`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 8, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 8, "HIGH": 0},
        }
        self.check_example("os-exec.py", expect)

    def test_os_popen(self):
        """Test for `os.popen`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 8, "MEDIUM": 0, "HIGH": 1},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 9},
        }
        self.check_example("os-popen.py", expect)

    def test_os_spawn(self):
        """Test for `os.spawn*`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 8, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 8, "HIGH": 0},
        }
        self.check_example("os-spawn.py", expect)

    def test_os_startfile(self):
        """Test for `os.startfile`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 3, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
        }
        self.check_example("os-startfile.py", expect)

    def test_os_system(self):
        """Test for `os.system`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("os_system.py", expect)

    def test_pickle(self):
        """Test for the `pickle` module."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 6, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 8},
        }
        self.check_example("pickle_deserialize.py", expect)

    def test_dill(self):
        """Test for the `dill` module."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 2, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("dill.py", expect)

    def test_shelve(self):
        """Test for the `shelve` module."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 2, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("shelve_open.py", expect)

    def test_popen_wrappers(self):
        """Test the `popen2` and `commands` modules."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 7, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 7},
        }
        self.check_example("popen_wrappers.py", expect)

    def test_random_module(self):
        """Test for the `random` module."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 7, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 7},
        }
        self.check_example("random_module.py", expect)

    def test_requests_ssl_verify_disabled(self):
        """Test for the `requests` library skipping verification."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 7},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 7},
        }
        self.check_example("requests-ssl-verify-disabled.py", expect)

    def test_skip(self):
        """Test `#nosec` and `#noqa` comments."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 5, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 5},
        }
        self.check_example("skip.py", expect)

    def test_ignore_skip(self):
        """Test --ignore-nosec flag."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 7, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 7},
        }
        self.check_example("skip.py", expect, ignore_nosec=True)

    def test_sql_statements(self):
        """Test for SQL injection through string building."""
        expect = {
            "SEVERITY": {
                "UNDEFINED": 0,
                "LOW": 0,
                "MEDIUM": 14,
                "HIGH": 0,
            },
            "CONFIDENCE": {
                "UNDEFINED": 0,
                "LOW": 8,
                "MEDIUM": 6,
                "HIGH": 0,
            },
        }
        self.check_example("sql_statements.py", expect)

    def test_ssl_insecure_version(self):
        """Test for insecure SSL protocol versions."""
        expect = {
            "SEVERITY": {"LOW": 1, "MEDIUM": 10, "HIGH": 7},
            "CONFIDENCE": {"LOW": 0, "MEDIUM": 11, "HIGH": 7},
        }
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 10, "HIGH": 7},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 11, "HIGH": 7},
        }
        self.check_example("ssl-insecure-version.py", expect)

    def test_subprocess_shell(self):
        """Test for `subprocess.Popen` with `shell=True`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 21, "MEDIUM": 1, "HIGH": 11},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 0, "HIGH": 32},
        }
        self.check_example("subprocess_shell.py", expect)

    def test_urlopen(self):
        """Test for dangerous URL opening."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 14, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 14},
        }
        self.check_example("urlopen.py", expect)

    def test_wildcard_injection(self):
        """Test for wildcard injection in shell commands."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 10, "MEDIUM": 0, "HIGH": 4},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 5, "HIGH": 9},
        }
        self.check_example("wildcard-injection.py", expect)

    def test_django_sql_injection(self):
        """Test insecure extra functions on Django."""

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 11, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 11, "HIGH": 0},
        }
        self.check_example("django_sql_injection_extra.py", expect)

    def test_django_sql_injection_raw(self):
        """Test insecure raw functions on Django."""

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 4, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 4, "HIGH": 0},
        }
        self.check_example("django_sql_injection_raw.py", expect)

    def test_yaml(self):
        """Test for `yaml.load`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("yaml_load.py", expect)

    def test_host_key_verification(self):
        """Test for ignoring host key verification."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 2, "HIGH": 0},
        }
        self.check_example("no_host_key_verification.py", expect)

    def test_jinja2_templating(self):
        """Test jinja templating for potential XSS bugs."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 5},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 2, "HIGH": 3},
        }
        self.check_example("jinja2_templating.py", expect)

    def test_mako_templating(self):
        """Test Mako templates for XSS."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("mako_templating.py", expect)

    def test_django_xss_secure(self):
        """Test false positives for Django XSS"""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }
        self.b_mgr.b_ts = b_test_set.BanditTestSet(
            config=self.b_mgr.b_conf, profile={"exclude": ["B308"]}
        )
        self.check_example("mark_safe_secure.py", expect)

    def test_django_xss_insecure(self):
        """Test for Django XSS via django.utils.safestring"""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 28, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 28},
        }
        self.b_mgr.b_ts = b_test_set.BanditTestSet(
            config=self.b_mgr.b_conf, profile={"exclude": ["B308"]}
        )
        self.check_example("mark_safe_insecure.py", expect)

    def test_xml(self):
        """Test xml vulnerabilities."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 4, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 5},
        }
        self.check_example("xml_etree_celementtree.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 2, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("xml_expatbuilder.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 3, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 4},
        }
        self.check_example("xml_lxml.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 2, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 4},
        }
        self.check_example("xml_pulldom.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("xml_xmlrpc.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 4, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 5},
        }
        self.check_example("xml_etree_elementtree.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("xml_expatreader.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 2, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 4},
        }
        self.check_example("xml_minidom.py", expect)

        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 6, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 8},
        }
        self.check_example("xml_sax.py", expect)

    def test_httpoxy(self):
        """Test httpoxy vulnerability."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("httpoxy_cgihandler.py", expect)
        self.check_example("httpoxy_twisted_script.py", expect)
        self.check_example("httpoxy_twisted_directory.py", expect)

    def test_asserts(self):
        """Test catching the use of assert."""
        test = next(
            x
            for x in self.b_mgr.b_ts.tests["Assert"]
            if x.__name__ == "assert_used"
        )

        test._config = {"skips": []}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("assert.py", expect)

        test._config = {"skips": ["*assert.py"]}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }
        self.check_example("assert.py", expect)

        test._config = {}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("assert.py", expect)

    def test_paramiko_injection(self):
        """Test paramiko command execution."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
        }
        self.check_example("paramiko_injection.py", expect)

    def test_partial_path(self):
        """Test process spawning with partial file paths."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 11, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 11},
        }
        self.check_example("partial_path_process.py", expect)

    def test_try_except_continue(self):
        """Test try, except, continue detection."""
        test = next(
            x
            for x in self.b_mgr.b_ts.tests["ExceptHandler"]
            if x.__name__ == "try_except_continue"
        )

        test._config = {"check_typed_exception": True}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 3, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("try_except_continue.py", expect)

        test._config = {"check_typed_exception": False}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("try_except_continue.py", expect)

    def test_try_except_pass(self):
        """Test try, except pass detection."""
        test = next(
            x
            for x in self.b_mgr.b_ts.tests["ExceptHandler"]
            if x.__name__ == "try_except_pass"
        )

        test._config = {"check_typed_exception": True}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 3, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("try_except_pass.py", expect)

        test._config = {"check_typed_exception": False}
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 2, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("try_except_pass.py", expect)

    def test_metric_gathering(self):
        expect = {
            "nosec": 2,
            "loc": 7,
            "issues": {"CONFIDENCE": {"HIGH": 5}, "SEVERITY": {"LOW": 5}},
        }
        self.check_metrics("skip.py", expect)
        expect = {
            "nosec": 0,
            "loc": 4,
            "issues": {"CONFIDENCE": {"HIGH": 2}, "SEVERITY": {"LOW": 2}},
        }
        self.check_metrics("imports.py", expect)

    def test_weak_cryptographic_key(self):
        """Test for weak key sizes."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 8, "HIGH": 8},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 16},
        }
        self.check_example("weak_cryptographic_key_sizes.py", expect)

    def test_multiline_code(self):
        """Test issues in multiline statements return code as expected."""
        self.run_example("multiline_statement.py")
        self.assertEqual(0, len(self.b_mgr.skipped))
        self.assertEqual(1, len(self.b_mgr.files_list))
        self.assertTrue(
            self.b_mgr.files_list[0].endswith("multiline_statement.py")
        )

        issues = self.b_mgr.get_issue_list()
        self.assertEqual(3, len(issues))
        self.assertTrue(
            issues[0].fname.endswith("examples/multiline_statement.py")
        )
        self.assertEqual(1, issues[0].lineno)
        if sys.version_info >= (3, 8):
            self.assertEqual(list(range(1, 2)), issues[0].linerange)
        else:
            self.assertEqual(list(range(1, 3)), issues[0].linerange)
        self.assertIn("subprocess", issues[0].get_code())
        self.assertEqual(5, issues[1].lineno)
        self.assertEqual(list(range(3, 6 + 1)), issues[1].linerange)
        self.assertIn("shell=True", issues[1].get_code())
        self.assertEqual(11, issues[2].lineno)
        if sys.version_info >= (3, 8):
            self.assertEqual(list(range(8, 13 + 1)), issues[2].linerange)
        else:
            self.assertEqual(list(range(8, 12 + 1)), issues[2].linerange)
        self.assertIn("shell=True", issues[2].get_code())

    def test_code_line_numbers(self):
        self.run_example("binding.py")
        issues = self.b_mgr.get_issue_list()

        code_lines = issues[0].get_code().splitlines()
        lineno = issues[0].lineno
        self.assertEqual("%i " % (lineno - 1), code_lines[0][:2])
        self.assertEqual("%i " % (lineno), code_lines[1][:2])
        self.assertEqual("%i " % (lineno + 1), code_lines[2][:2])

    def test_flask_debug_true(self):
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
        }
        self.check_example("flask_debug.py", expect)

    def test_nosec(self):
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 5, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 5},
        }
        self.check_example("nosec.py", expect)

    def test_baseline_filter(self):
        issue_text = (
            "A Flask app appears to be run with debug=True, which "
            "exposes the Werkzeug debugger and allows the execution "
            "of arbitrary code."
        )
        json = """{{
          "results": [
            {{
              "code": "...",
              "filename": "{}/examples/flask_debug.py",
              "issue_confidence": "MEDIUM",
              "issue_severity": "HIGH",
              "issue_cwe": {{
                "id": 94,
                "link": "https://cwe.mitre.org/data/definitions/94.html"
              }},
              "issue_text": "{}",
              "line_number": 10,
              "col_offset": 0,
              "line_range": [
                10
              ],
              "test_name": "flask_debug_true",
              "test_id": "B201"
            }}
          ]
        }}
        """.format(
            os.getcwd(),
            issue_text,
        )

        self.b_mgr.populate_baseline(json)
        self.run_example("flask_debug.py")
        self.assertEqual(1, len(self.b_mgr.baseline))
        self.assertEqual({}, self.b_mgr.get_issue_list())

    def test_unverified_context(self):
        """Test for `ssl._create_unverified_context`."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 1},
        }
        self.check_example("unverified_context.py", expect)

    def test_hashlib_new_insecure_functions(self):
        """Test insecure hash functions created by `hashlib.new`."""
        if sys.version_info >= (3, 9):
            expect = {
                "SEVERITY": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 10,
                },
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 10,
                },
            }
        else:
            expect = {
                "SEVERITY": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 11,
                    "HIGH": 0,
                },
                "CONFIDENCE": {
                    "UNDEFINED": 0,
                    "LOW": 0,
                    "MEDIUM": 0,
                    "HIGH": 11,
                },
            }
        self.check_example("hashlib_new_insecure_functions.py", expect)

    def test_blacklist_pycrypto(self):
        """Test importing pycrypto module"""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 2},
        }
        self.check_example("pycrypto.py", expect)

    def test_no_blacklist_pycryptodome(self):
        """Test importing pycryptodome module

        make sure it's no longer blacklisted
        """
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 0},
        }
        self.check_example("pycryptodome.py", expect)

    def test_blacklist_pyghmi(self):
        """Test calling pyghmi methods"""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 1, "MEDIUM": 0, "HIGH": 1},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 1, "HIGH": 1},
        }
        self.check_example("pyghmi.py", expect)

    def test_snmp_security_check(self):
        """Test insecure and weak crypto usage of SNMP."""
        expect = {
            "SEVERITY": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 3, "HIGH": 0},
            "CONFIDENCE": {"UNDEFINED": 0, "LOW": 0, "MEDIUM": 0, "HIGH": 3},
        }
        self.check_example("snmp.py", expect)