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import pytest |
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import logging |
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import os |
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import ssg.controls |
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import ssg.build_yaml |
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from ssg.environment import open_environment |
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from ssg.products import load_product_yaml |
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ssg_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__)))) |
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data_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), "data")) |
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controls_dir = os.path.join(data_dir, "controls_dir") |
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profiles_dir = os.path.join(data_dir, "profiles_dir") |
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def assert_control_confirms_to_standard(controls_manager, profile): |
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c_r1 = controls_manager.get_control(profile, "R1") |
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assert c_r1.title == "User session timeout" |
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assert c_r1.description == "Remote user sessions must be closed after " \ |
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"a certain period of inactivity." |
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assert c_r1.automated == "yes" |
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c_r1_rules = c_r1.selected |
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assert "sshd_set_idle_timeout" in c_r1_rules |
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assert "accounts_tmout" in c_r1_rules |
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assert "var_accounts_tmout=10_min" not in c_r1_rules |
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assert "var_accounts_tmout" in c_r1.variables |
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assert c_r1.variables["var_accounts_tmout"] == "10_min" |
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# abcd is a level-less policy |
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assert c_r1.levels == ["default"] |
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assert "vague" in c_r1.notes |
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c_r2 = controls_manager.get_control(profile, "R2") |
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assert c_r2.automated == "no" |
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assert c_r2.notes == "This is individual depending on the system " \ |
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"workload therefore needs to be audited manually." |
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assert c_r2.rationale == "Minimization of configuration helps to reduce attack surface." |
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c_r4 = controls_manager.get_control(profile, "R4") |
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assert len(c_r4.selected) == 3 |
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c_r4_rules = c_r4.selected |
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assert "accounts_passwords_pam_faillock_deny_root" in c_r4_rules |
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assert "accounts_password_pam_minlen" in c_r4_rules |
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assert "accounts_password_pam_ocredit" in c_r4_rules |
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assert "var_password_pam_ocredit" in c_r4.variables |
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assert c_r4.variables["var_password_pam_ocredit"] == "1" |
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assert "R4.a" in c_r4.controls |
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assert "R4.b" in c_r4.controls |
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c_r5 = controls_manager.get_control(profile, "R5") |
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assert c_r5.id == "R5" |
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assert c_r5.status == "does not meet" |
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assert c_r5.fixtext == "There is no fixtext." |
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assert c_r5.check == "There is no check." |
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assert "Although the listed mitigation is supporting the security function" in c_r5.mitigation |
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assert c_r5.description == \ |
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"The operating system must provide automated mechanisms for supporting account " \ |
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"management functions." |
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assert "Enterprise environments make account management challenging and complex." in \ |
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c_r5.rationale |
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assert c_r5.status_justification == "Mitigate with third-party software." |
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@pytest.fixture |
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def env_yaml(): |
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product_yaml = os.path.join(ssg_root, "products", "rhel8", "product.yml") |
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build_config_yaml = os.path.join(ssg_root, "build", "build_config.yml") |
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env_yaml = open_environment(build_config_yaml, product_yaml) |
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return env_yaml |
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@pytest.fixture |
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def controls_manager(env_yaml): |
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controls_manager = ssg.controls.ControlsManager(controls_dir, env_yaml) |
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controls_manager.load() |
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return controls_manager |
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@pytest.fixture |
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def compiled_controls_dir_py2(tmpdir): |
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return str(tmpdir) |
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@pytest.fixture |
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def compiled_controls_dir_py3(tmp_path): |
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return tmp_path |
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@pytest.fixture |
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def compiled_controls_manager(env_yaml, controls_manager,compiled_controls_dir_py2): |
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controls_manager.save_everything(compiled_controls_dir_py2) |
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controls_manager = ssg.controls.ControlsManager(compiled_controls_dir_py2, env_yaml) |
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controls_manager.load() |
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return controls_manager |
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def _load_test(controls_manager, profile): |
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assert_control_confirms_to_standard(controls_manager, profile) |
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def test_controls_load(controls_manager): |
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_load_test(controls_manager, "abcd") |
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def test_controls_invalid_rules(env_yaml): |
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existing_rules = {"accounts_tmout", "configure_crypto_policy"} |
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controls_manager = ssg.controls.ControlsManager( |
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controls_dir, env_yaml, existing_rules) |
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with pytest.raises(ValueError) as exc: |
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controls_manager.load() |
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assert str(exc.value) == \ |
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"Control abcd:R1 contains nonexisting rule(s) sshd_set_idle_timeout" |
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def test_controls_levels(controls_manager): |
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# Default level is the lowest level |
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c_1 = controls_manager.get_control("abcd-levels", "S1") |
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assert c_1.levels == ["low"] |
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c_4 = controls_manager.get_control("abcd-levels", "S4") |
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assert c_4.levels == ["low"] |
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# Explicit levels |
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c_2 = controls_manager.get_control("abcd-levels", "S2") |
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assert c_2.levels == ["low"] |
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c_3 = controls_manager.get_control("abcd-levels", "S3") |
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assert c_3.levels == ["medium"] |
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c_4a = controls_manager.get_control("abcd-levels", "S4.a") |
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assert c_4a.levels == ["low"] |
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c_4b = controls_manager.get_control("abcd-levels", "S4.b") |
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assert c_4b.levels == ["high"] |
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c_5 = controls_manager.get_control("abcd-levels", "S5") |
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assert c_5.levels == ["low"] |
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c_6 = controls_manager.get_control("abcd-levels", "S6") |
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assert c_6.levels == ["medium"] |
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c_7 = controls_manager.get_control("abcd-levels", "S7") |
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assert c_7.levels == ["high"] |
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# test if all crypto-policy controls have the rule selected |
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assert "configure_crypto_policy" in c_5.selections |
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assert "configure_crypto_policy" in c_6.selections |
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assert "configure_crypto_policy" in c_7.selections |
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# just the essential controls |
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low_controls = controls_manager.get_all_controls_of_level( |
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"abcd-levels", "low") |
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# essential and more advanced together |
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medium_controls = controls_manager.get_all_controls_of_level( |
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"abcd-levels", "medium") |
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high_controls = controls_manager.get_all_controls_of_level( |
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"abcd-levels", "high") |
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all_controls = controls_manager.get_all_controls("abcd-levels") |
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assert len(high_controls) == len(all_controls) |
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assert len(low_controls) <= len(high_controls) |
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assert len(low_controls) == 5 |
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assert len(medium_controls) == 7 |
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# test overriding of variables in levels |
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assert c_2.variables["var_password_pam_minlen"] == "1" |
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assert "var_password_pam_minlen" not in c_3.variables.keys() |
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assert c_4b.variables["var_password_pam_minlen"] == "2" |
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variable_found = False |
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for c in low_controls: |
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if "var_password_pam_minlen" in c.variables.keys(): |
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variable_found = True |
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assert c.variables["var_password_pam_minlen"] == "1" |
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assert variable_found |
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variable_found = False |
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for c in medium_controls: |
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if "var_password_pam_minlen" in c.variables.keys(): |
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variable_found = True |
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assert c.variables["var_password_pam_minlen"] == "1" |
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assert variable_found |
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variable_found = False |
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for c in high_controls: |
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if "var_password_pam_minlen" in c.variables.keys(): |
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variable_found = True |
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assert c.variables["var_password_pam_minlen"] == "2" |
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assert variable_found |
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# now test if controls of lower level has the variable definition correctly removed |
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# because it is overriden by higher level controls |
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s2_high = [c for c in high_controls if c.id == "S2"] |
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assert len(s2_high) == 1 |
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assert "var_some_variable" not in s2_high[0].variables.keys() |
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assert "var_password_pam_minlen" not in s2_high[0].variables.keys() |
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s4b_high = [c for c in high_controls if c.id == "S4.b"] |
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assert len(s4b_high) == 1 |
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assert s4b_high[0].variables["var_some_variable"] == "3" |
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assert s4b_high[0].variables["var_password_pam_minlen"] == "2" |
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# check that in low level the variable is correctly placed there in S2 |
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s2_low = [c for c in low_controls if c.id == "S2"] |
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assert len(s2_low) == 1 |
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assert s2_low[0].variables["var_some_variable"] == "1" |
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assert s2_low[0].variables["var_password_pam_minlen"] == "1" |
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# check that low, medium and high levels have crypto policy selected |
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s5_low = [c for c in low_controls if c.id == "S5"] |
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assert len(s5_low) == 1 |
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assert "configure_crypto_policy" in s5_low[0].selections |
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s5_medium = [c for c in medium_controls if c.id == "S5"] |
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assert len(s5_medium) == 1 |
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assert "configure_crypto_policy" in s5_medium[0].selections |
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s6_medium = [c for c in medium_controls if c.id == "S6"] |
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assert len(s6_medium) == 1 |
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assert "configure_crypto_policy" in s6_medium[0].selections |
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s5_high = [c for c in high_controls if c.id == "S5"] |
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assert len(s5_high) == 1 |
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assert "configure_crypto_policy" in s5_high[0].selections |
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s6_high = [c for c in high_controls if c.id == "S6"] |
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assert len(s6_high) == 1 |
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assert "configure_crypto_policy" in s6_high[0].selections |
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s7_high = [c for c in high_controls if c.id == "S7"] |
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assert len(s7_high) == 1 |
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assert "configure_crypto_policy" in s7_high[0].selections |
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224
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225
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def test_controls_load_product(controls_manager): |
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c_r1 = controls_manager.get_control("abcd", "R1") |
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assert c_r1.title == "User session timeout" |
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assert c_r1.description == "Remote user sessions must be closed after " \ |
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"a certain period of inactivity." |
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assert c_r1.automated == "yes" |
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232
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c_r1_rules = c_r1.selected |
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assert "sshd_set_idle_timeout" in c_r1_rules |
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assert "accounts_tmout" in c_r1_rules |
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assert "var_accounts_tmout=10_min" not in c_r1_rules |
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assert "var_accounts_tmout" in c_r1.variables |
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assert c_r1.variables["var_accounts_tmout"] == "10_min" |
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239
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240
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def test_profile_resolution_inline(env_yaml, controls_manager): |
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profile_resolution( |
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env_yaml, controls_manager, ssg.build_yaml.ProfileWithInlinePolicies, "abcd-low-inline") |
243
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244
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245
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def test_profile_resolution_extends_inline(env_yaml, controls_manager): |
246
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profile_resolution_extends( |
247
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env_yaml, controls_manager, |
248
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ssg.build_yaml.ProfileWithInlinePolicies, |
249
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"abcd-low-inline", "abcd-high-inline") |
250
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251
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252
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def test_profile_resolution_all_inline(env_yaml, controls_manager): |
253
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profile_resolution_all( |
254
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env_yaml, controls_manager, ssg.build_yaml.ProfileWithInlinePolicies, "abcd-all-inline") |
255
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256
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257
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class DictContainingAnyRule(dict): |
258
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def __getitem__(self, key): |
259
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rule = ssg.build_yaml.Rule(key) |
260
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rule.product = "all" |
261
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return rule |
262
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263
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def __contains__(self, rid): |
264
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return True |
265
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266
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267
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def profile_resolution(env_yaml, controls_manager, cls, profile_low): |
268
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low_profile_path = os.path.join(profiles_dir, profile_low + ".profile") |
269
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profile = cls.from_yaml(low_profile_path, env_yaml) |
270
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all_profiles = {"abcd-low": profile} |
271
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rules_by_id = DictContainingAnyRule() |
272
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273
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profile.resolve(all_profiles, rules_by_id, controls_manager=controls_manager) |
274
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275
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# Profile 'abcd-low' selects controls R1, R2, R3 from 'abcd' policy, |
276
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# which should add the following rules to the profile: |
277
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selected = profile.get_rule_selectors() |
278
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assert "sshd_set_idle_timeout" in selected |
279
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assert "accounts_tmout" in selected |
280
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assert "configure_crypto_policy" in selected |
281
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assert "var_accounts_tmout" in profile.variables |
282
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283
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# The rule "security_patches_up_to_date" has been selected directly |
284
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# by profile selections, not by using controls, so it should be in |
285
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# the resolved profile as well. |
286
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assert "security_patches_up_to_date" in selected |
287
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288
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289
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def profile_resolution_extends(env_yaml, controls_manager, cls, profile_low, profile_high): |
290
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low_profile_path = os.path.join(profiles_dir, profile_low + ".profile") |
291
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low_profile = cls.from_yaml(low_profile_path, env_yaml) |
292
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high_profile_path = os.path.join(profiles_dir, profile_high + ".profile") |
293
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high_profile = cls.from_yaml(high_profile_path, env_yaml) |
294
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all_profiles = {profile_low: low_profile, profile_high: high_profile} |
295
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rules_by_id = DictContainingAnyRule() |
296
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297
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high_profile.resolve(all_profiles, rules_by_id, controls_manager=controls_manager) |
298
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299
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# Profile 'abcd-high' selects controls R1, R2, R3 from 'abcd' policy, |
300
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# which should add the following rules to the profile: |
301
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selected = high_profile.get_rule_selectors() |
302
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assert "sshd_set_idle_timeout" in selected |
303
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assert "accounts_tmout" in selected |
304
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assert "configure_crypto_policy" in selected |
305
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assert "var_accounts_tmout" in high_profile.variables |
306
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|
307
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# The rule "security_patches_up_to_date" has been selected directly by the |
308
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# abcd-low profile selections, not by using controls, so it should be |
309
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# in the resolved profile as well. |
310
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assert "security_patches_up_to_date" in selected |
311
|
|
|
|
312
|
|
|
assert "accounts_passwords_pam_faillock_deny_root" in selected |
313
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|
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assert "accounts_password_pam_minlen" in selected |
314
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|
|
assert "accounts_password_pam_ocredit" in selected |
315
|
|
|
assert "var_password_pam_ocredit" in high_profile.variables |
316
|
|
|
assert high_profile.variables["var_password_pam_ocredit"] == "2" |
317
|
|
|
|
318
|
|
|
|
319
|
|
|
def profile_resolution_all(env_yaml, controls_manager, cls, profile_all): |
320
|
|
|
profile_path = os.path.join(profiles_dir, profile_all + ".profile") |
321
|
|
|
profile = cls.from_yaml(profile_path, env_yaml) |
322
|
|
|
all_profiles = {profile_all: profile} |
323
|
|
|
rules_by_id = DictContainingAnyRule() |
324
|
|
|
|
325
|
|
|
profile.resolve(all_profiles, rules_by_id, controls_manager=controls_manager) |
326
|
|
|
|
327
|
|
|
# Profile 'abcd-all' selects all controls from 'abcd' policy, |
328
|
|
|
# which should add the following rules and variables to the profile: |
329
|
|
|
selected = profile.get_rule_selectors() |
330
|
|
|
assert "sshd_set_idle_timeout" in selected |
331
|
|
|
assert "accounts_tmout" in selected |
332
|
|
|
assert "var_accounts_tmout" in profile.variables |
333
|
|
|
assert profile.variables["var_accounts_tmout"] == "10_min" |
334
|
|
|
assert "configure_crypto_policy" in selected |
335
|
|
|
# Rule "systemd_target_multi_user" is only "related_rules" |
336
|
|
|
# therefore it should not appear in the resolved profile. |
337
|
|
|
assert "systemd_target_multi_user" not in selected |
338
|
|
|
assert "accounts_passwords_pam_faillock_deny_root" in selected |
339
|
|
|
assert "accounts_password_pam_minlen" in selected |
340
|
|
|
assert "accounts_password_pam_ocredit" in selected |
341
|
|
|
assert "var_password_pam_ocredit" in profile.variables |
342
|
|
|
assert profile.variables["var_password_pam_ocredit"] == "1" |
343
|
|
|
|
344
|
|
|
# The rule "security_patches_up_to_date" has been selected directly |
345
|
|
|
# by profile selections, not by using controls, so it should be in |
346
|
|
|
# the resolved profile as well. |
347
|
|
|
assert "security_patches_up_to_date" in selected |
348
|
|
|
|
349
|
|
|
|
350
|
|
|
def test_load_control_from_folder(controls_manager): |
351
|
|
|
_load_test(controls_manager, "qrst") |
352
|
|
|
|
353
|
|
|
|
354
|
|
|
def test_load_control_from_folder_and_file(controls_manager): |
355
|
|
|
_load_test(controls_manager, "jklm") |
356
|
|
|
|
357
|
|
|
|
358
|
|
|
def test_load_compiled_control_from_folder_and_file(compiled_controls_dir_py2, compiled_controls_manager): |
359
|
|
|
_load_test(compiled_controls_manager, "jklm") |
360
|
|
|
|
361
|
|
|
|
362
|
|
|
def test_load_control_from_specific_folder_and_file(controls_manager): |
363
|
|
|
_load_test(controls_manager, "nopq") |
364
|
|
|
|
365
|
|
|
|
366
|
|
|
@pytest.fixture |
367
|
|
|
def minimal_empty_controls(): |
368
|
|
|
return [dict(title="control", id="c", rules=["a"])] |
369
|
|
|
|
370
|
|
|
|
371
|
|
|
@pytest.fixture |
372
|
|
|
def one_simple_subcontrol(): |
373
|
|
|
return dict(title="subcontrol", id="s", rules=["b"]) |
374
|
|
|
|
375
|
|
|
|
376
|
|
|
def test_policy_parse_from_dict(minimal_empty_controls): |
377
|
|
|
policy = ssg.controls.Policy("") |
378
|
|
|
controls = policy.save_controls_tree(minimal_empty_controls) |
379
|
|
|
controls = policy.controls |
380
|
|
|
assert len(controls) == 1 |
381
|
|
|
control = controls[0] |
382
|
|
|
assert control.title == "control" |
383
|
|
|
|
384
|
|
|
|
385
|
|
|
def test_policy_fail_parse_from_incomplete_dict(minimal_empty_controls): |
386
|
|
|
incomplete_controls = minimal_empty_controls |
387
|
|
|
incomplete_controls[0]["controls"] = [dict(title="nested")] |
388
|
|
|
|
389
|
|
|
policy = ssg.controls.Policy("") |
390
|
|
|
|
391
|
|
|
with pytest.raises(RuntimeError, match="id"): |
392
|
|
|
policy.save_controls_tree(incomplete_controls) |
393
|
|
|
|
394
|
|
|
|
395
|
|
|
def order_by_attribute(items, attribute, ordering): |
396
|
|
|
items_by_attribute = {getattr(i, attribute): i for i in items} |
397
|
|
|
return [items_by_attribute[val] for val in ordering] |
398
|
|
|
|
399
|
|
|
|
400
|
|
|
def test_policy_parse_from_nested(minimal_empty_controls, one_simple_subcontrol): |
401
|
|
|
nested_controls = minimal_empty_controls |
402
|
|
|
nested_controls[0]["controls"] = [one_simple_subcontrol] |
403
|
|
|
|
404
|
|
|
policy = ssg.controls.Policy("P") |
405
|
|
|
controls = policy.save_controls_tree(minimal_empty_controls) |
406
|
|
|
controls = policy.controls |
407
|
|
|
assert len(controls) == 2 |
408
|
|
|
control, subcontrol = order_by_attribute(controls, "id", ("c", "s")) |
409
|
|
|
assert control.title == "control" |
410
|
|
|
assert control.selections == ["a"] |
411
|
|
|
assert subcontrol.title == "subcontrol" |
412
|
|
|
assert subcontrol.selections == ["b"] |
413
|
|
|
|
414
|
|
|
controls_manager = ssg.controls.ControlsManager("", dict()) |
415
|
|
|
controls_manager.policies[policy.id] = policy |
416
|
|
|
|
417
|
|
|
controls_manager.resolve_controls() |
418
|
|
|
control = policy.get_control("c") |
419
|
|
|
assert control.selections == ["a", "b"] |
420
|
|
|
|
421
|
|
|
|
422
|
|
|
def test_manager_removes_rules(): |
423
|
|
|
control_dict = dict(id="top", rules=["one", "two", "three", "!four", "!five"]) |
424
|
|
|
|
425
|
|
|
policy = ssg.controls.Policy("") |
426
|
|
|
policy.save_controls_tree([control_dict]) |
427
|
|
|
policy.id = "P" |
428
|
|
|
|
429
|
|
|
controls_manager = ssg.controls.ControlsManager("", dict()) |
430
|
|
|
controls_manager.policies[policy.id] = policy |
431
|
|
|
|
432
|
|
|
control = controls_manager.get_control("P", "top") |
433
|
|
|
assert len(control.selections) == 5 |
434
|
|
|
|
435
|
|
|
controls_manager.remove_selections_not_known(["one", "four"]) |
436
|
|
|
control = controls_manager.get_control("P", "top") |
437
|
|
|
assert len(control.selections) == 2 |
438
|
|
|
assert "one" in control.selections |
439
|
|
|
assert "!four" in control.selections |
440
|
|
|
|
441
|
|
|
controls_manager.remove_selections_not_known([]) |
442
|
|
|
control = controls_manager.get_control("P", "top") |
443
|
|
|
assert len(control.selections) == 0 |
444
|
|
|
|
445
|
|
|
|
446
|
|
|
def test_policy_parse_from_nested(): |
447
|
|
|
top_control_dict = dict(id="top", controls=["nested-1"]) |
448
|
|
|
first_nested_dict = dict(id="nested-1", controls=["nested-2"], rules="Y") |
449
|
|
|
second_nested_dict = dict(id="nested-2", rules=["X"]) |
450
|
|
|
|
451
|
|
|
policy = ssg.controls.Policy("") |
452
|
|
|
policy.id = "P" |
453
|
|
|
|
454
|
|
|
controls_manager = ssg.controls.ControlsManager("", dict()) |
455
|
|
|
controls_manager.policies[policy.id] = policy |
456
|
|
|
|
457
|
|
|
controls = policy.save_controls_tree([top_control_dict, second_nested_dict, first_nested_dict]) |
458
|
|
|
controls_manager.resolve_controls() |
459
|
|
|
control = policy.get_control("top") |
460
|
|
|
assert "Y" in control.selections |
461
|
|
|
assert "X" in control.selections |
462
|
|
|
|
463
|
|
|
|
464
|
|
|
def test_policy_parse_from_ours_and_foreign(): |
465
|
|
|
main_control_dict = dict(id="top", controls=["foreign:top", "ours", "P:ours_qualified"]) |
466
|
|
|
main_subcontrol_dicts = [dict(id="ours", rules=["ours"]), dict(id="ours_qualified", rules=["really_ours"])] |
467
|
|
|
foreign_control_dict = dict(id="top", rules=["foreign"]) |
468
|
|
|
|
469
|
|
|
main_policy = ssg.controls.Policy("") |
470
|
|
|
main_policy.id = "P" |
471
|
|
|
main_policy.save_controls_tree([main_control_dict] + main_subcontrol_dicts) |
472
|
|
|
|
473
|
|
|
foreign_policy = ssg.controls.Policy("") |
474
|
|
|
foreign_policy.id = "foreign" |
475
|
|
|
foreign_policy.save_controls_tree([foreign_control_dict]) |
476
|
|
|
|
477
|
|
|
controls_manager = ssg.controls.ControlsManager("", dict()) |
478
|
|
|
controls_manager.policies[main_policy.id] = main_policy |
479
|
|
|
controls_manager.policies[foreign_policy.id] = foreign_policy |
480
|
|
|
|
481
|
|
|
controls_manager.resolve_controls() |
482
|
|
|
control = controls_manager.get_control("P", "top") |
483
|
|
|
assert "ours" in control.selections |
484
|
|
|
assert "really_ours" in control.selections |
485
|
|
|
assert "foreign" in control.selections |
486
|
|
|
|
487
|
|
|
|
488
|
|
|
def test_policy_parse_from_referenced(minimal_empty_controls, one_simple_subcontrol): |
489
|
|
|
nested_controls = minimal_empty_controls |
490
|
|
|
nested_controls[0]["controls"] = ["s"] |
491
|
|
|
nested_controls.append(one_simple_subcontrol) |
492
|
|
|
|
493
|
|
|
policy = ssg.controls.Policy("") |
494
|
|
|
policy.id = "P" |
495
|
|
|
controls = policy.save_controls_tree(minimal_empty_controls) |
496
|
|
|
controls = policy.controls |
497
|
|
|
assert len(controls) == 2 |
498
|
|
|
control, subcontrol = order_by_attribute(controls, "id", ("c", "s")) |
499
|
|
|
assert control.title == "control" |
500
|
|
|
assert control.controls == ["s"] |
501
|
|
|
assert subcontrol.title == "subcontrol" |
502
|
|
|
|
503
|
|
|
|
504
|
|
|
def test_control_with_bad_key(): |
505
|
|
|
control = {'id': 'abcd', 'badval': 'should not be here', } |
506
|
|
|
control_obj = None |
507
|
|
|
try: |
508
|
|
|
control_obj = ssg.controls.Control.from_control_dict(control) |
509
|
|
|
except ValueError as e: |
510
|
|
|
assert type(e) is ValueError |
511
|
|
|
assert control_obj is None |
512
|
|
|
|