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from __future__ import absolute_import |
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from __future__ import print_function |
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import os |
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import os.path |
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from collections import defaultdict |
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import datetime |
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import re |
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import sys |
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import yaml |
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from .constants import XCCDF_PLATFORM_TO_CPE |
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from .constants import PRODUCT_TO_CPE_MAPPING |
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from .constants import STIG_PLATFORM_ID_MAP |
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from .constants import XCCDF_REFINABLE_PROPERTIES |
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from .rules import get_rule_dir_id, get_rule_dir_yaml, is_rule_dir |
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from .rule_yaml import parse_prodtype |
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from .checks import is_cce_format_valid, is_cce_value_valid |
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from .yaml import DocumentationNotComplete, open_and_expand, open_and_macro_expand |
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from .utils import required_key, mkdir_p |
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from .xml import ElementTree as ET |
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from .shims import unicode_func |
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def add_sub_element(parent, tag, data): |
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""" |
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Creates a new child element under parent with tag tag, and sets |
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data as the content under the tag. In particular, data is a string |
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to be parsed as an XML tree, allowing sub-elements of children to be |
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added. |
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If data should not be parsed as an XML tree, either escape the contents |
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before passing into this function, or use ElementTree.SubElement(). |
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Returns the newly created subelement of type tag. |
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""" |
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# This is used because our YAML data contain XML and XHTML elements |
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# ET.SubElement() escapes the < > characters by < and > |
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# and therefore it does not add child elements |
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# we need to do a hack instead |
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# TODO: Remove this function after we move to Markdown everywhere in SSG |
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ustr = unicode_func("<{0}>{1}</{0}>").format(tag, data) |
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try: |
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element = ET.fromstring(ustr.encode("utf-8")) |
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except Exception: |
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msg = ("Error adding subelement to an element '{0}' from string: '{1}'" |
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.format(parent.tag, ustr)) |
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raise RuntimeError(msg) |
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parent.append(element) |
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return element |
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def reorder_according_to_ordering(unordered, ordering, regex=None): |
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ordered = [] |
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if regex is None: |
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regex = "|".join(["({0})".format(item) for item in ordering]) |
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regex = re.compile(regex) |
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items_to_order = list(filter(regex.match, unordered)) |
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unordered = set(unordered) |
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for priority_type in ordering: |
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for item in items_to_order: |
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if priority_type in item and item in unordered: |
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ordered.append(item) |
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unordered.remove(item) |
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ordered.extend(list(unordered)) |
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return ordered |
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def add_warning_elements(element, warnings): |
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# The use of [{dict}, {dict}] in warnings is to handle the following |
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# scenario where multiple warnings have the same category which is |
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# valid in SCAP and our content: |
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# |
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# warnings: |
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# - general: Some general warning |
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# - general: Some other general warning |
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# - general: |- |
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# Some really long multiline general warning |
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# |
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# Each of the {dict} should have only one key/value pair. |
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for warning_dict in warnings: |
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warning = add_sub_element(element, "warning", list(warning_dict.values())[0]) |
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warning.set("category", list(warning_dict.keys())[0]) |
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def add_nondata_subelements(element, subelement, attribute, attr_data): |
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"""Add multiple iterations of a sublement that contains an attribute but no data |
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For example, <requires id="my_required_id"/>""" |
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for data in attr_data: |
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req = ET.SubElement(element, subelement) |
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req.set(attribute, data) |
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class Profile(object): |
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"""Represents XCCDF profile |
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""" |
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def __init__(self, id_): |
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self.id_ = id_ |
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self.title = "" |
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self.description = "" |
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self.extends = None |
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self.selected = [] |
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self.unselected = [] |
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self.variables = dict() |
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self.refine_rules = defaultdict(list) |
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@classmethod |
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def from_yaml(cls, yaml_file, env_yaml=None): |
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yaml_contents = open_and_expand(yaml_file, env_yaml) |
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if yaml_contents is None: |
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return None |
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basename, _ = os.path.splitext(os.path.basename(yaml_file)) |
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profile = cls(basename) |
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profile.title = required_key(yaml_contents, "title") |
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del yaml_contents["title"] |
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profile.description = required_key(yaml_contents, "description") |
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del yaml_contents["description"] |
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profile.extends = yaml_contents.pop("extends", None) |
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selection_entries = required_key(yaml_contents, "selections") |
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if selection_entries: |
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profile._parse_selections(selection_entries) |
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del yaml_contents["selections"] |
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if yaml_contents: |
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raise RuntimeError("Unparsed YAML data in '%s'.\n\n%s" |
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% (yaml_file, yaml_contents)) |
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return profile |
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def dump_yaml(self, file_name, documentation_complete=True): |
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to_dump = {} |
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to_dump["documentation_complete"] = documentation_complete |
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to_dump["title"] = self.title |
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to_dump["description"] = self.description |
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if self.extends is not None: |
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to_dump["extends"] = self.extends |
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selections = [] |
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for item in self.selected: |
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selections.append(item) |
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for item in self.unselected: |
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selections.append("!"+item) |
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for varname in self.variables.keys(): |
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selections.append(varname+"="+self.variables.get(varname)) |
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for rule, refinements in self.refine_rules.items(): |
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for prop, val in refinements: |
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selections.append("{rule}.{property}={value}" |
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.format(rule=rule, property=prop, value=val)) |
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to_dump["selections"] = selections |
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with open(file_name, "w+") as f: |
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yaml.dump(to_dump, f, indent=4) |
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def _parse_selections(self, entries): |
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for item in entries: |
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if "." in item: |
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rule, refinement = item.split(".", 1) |
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property_, value = refinement.split("=", 1) |
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if property_ not in XCCDF_REFINABLE_PROPERTIES: |
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msg = ("Property '{property_}' cannot be refined. " |
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"Rule properties that can be refined are {refinables}. " |
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"Fix refinement '{rule_id}.{property_}={value}' in profile '{profile}'." |
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.format(property_=property_, refinables=XCCDF_REFINABLE_PROPERTIES, |
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rule_id=rule, value=value, profile=self.id_) |
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) |
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raise ValueError(msg) |
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self.refine_rules[rule].append((property_, value)) |
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elif "=" in item: |
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varname, value = item.split("=", 1) |
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self.variables[varname] = value |
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elif item.startswith("!"): |
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self.unselected.append(item[1:]) |
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else: |
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self.selected.append(item) |
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def to_xml_element(self): |
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element = ET.Element('Profile') |
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element.set("id", self.id_) |
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if self.extends: |
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element.set("extends", self.extends) |
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title = add_sub_element(element, "title", self.title) |
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title.set("override", "true") |
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desc = add_sub_element(element, "description", self.description) |
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desc.set("override", "true") |
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for selection in self.selected: |
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select = ET.Element("select") |
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select.set("idref", selection) |
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select.set("selected", "true") |
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element.append(select) |
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for selection in self.unselected: |
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unselect = ET.Element("select") |
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unselect.set("idref", selection) |
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unselect.set("selected", "false") |
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element.append(unselect) |
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207
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for value_id, selector in self.variables.items(): |
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refine_value = ET.Element("refine-value") |
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refine_value.set("idref", value_id) |
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refine_value.set("selector", selector) |
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element.append(refine_value) |
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213
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for refined_rule, refinement_list in self.refine_rules.items(): |
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refine_rule = ET.Element("refine-rule") |
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215
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refine_rule.set("idref", refined_rule) |
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for refinement in refinement_list: |
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refine_rule.set(refinement[0], refinement[1]) |
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element.append(refine_rule) |
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220
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return element |
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222
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2 |
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def get_rule_selectors(self): |
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return list(self.selected + self.unselected) |
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225
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def get_variable_selectors(self): |
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return self.variables |
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228
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def validate_refine_rules(self, rules): |
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existing_rule_ids = [r.id_ for r in rules] |
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for refine_rule, refinement_list in self.refine_rules.items(): |
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# Take first refinement to ilustrate where the error is |
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# all refinements in list are invalid, so it doesn't really matter |
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a_refinement = refinement_list[0] |
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235
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if refine_rule not in existing_rule_ids: |
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msg = ( |
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237
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"You are trying to refine a rule that doesn't exist. " |
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"Rule '{rule_id}' was not found in the benchmark. " |
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"Please check all rule refinements for rule: '{rule_id}', for example: " |
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"- {rule_id}.{property_}={value}' in profile {profile_id}." |
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.format(rule_id=refine_rule, profile_id=self.id_, |
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property_=a_refinement[0], value=a_refinement[1]) |
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) |
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244
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raise ValueError(msg) |
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245
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246
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if refine_rule not in self.get_rule_selectors(): |
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msg = ("- {rule_id}.{property_}={value}' in profile '{profile_id}' is refining " |
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248
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"a rule that is not selected by it. The refinement will not have any " |
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249
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"noticeable effect. Either select the rule or remove the rule refinement." |
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250
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.format(rule_id=refine_rule, property_=a_refinement[0], |
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value=a_refinement[1], profile_id=self.id_) |
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252
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) |
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253
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raise ValueError(msg) |
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254
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255
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2 |
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def validate_variables(self, variables): |
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256
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variables_by_id = dict() |
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257
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for var in variables: |
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258
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variables_by_id[var.id_] = var |
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259
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260
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for var_id, our_val in self.variables.items(): |
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261
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if var_id not in variables_by_id: |
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262
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all_vars_list = [" - %s" % v for v in variables_by_id.keys()] |
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263
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msg = ( |
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264
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"Value '{var_id}' in profile '{profile_name}' is not known. " |
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265
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"We know only variables:\n{var_names}" |
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266
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.format( |
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267
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var_id=var_id, profile_name=self.id_, |
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268
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var_names="\n".join(sorted(all_vars_list))) |
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269
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) |
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270
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raise ValueError(msg) |
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271
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272
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allowed_selectors = [str(s) for s in variables_by_id[var_id].options.keys()] |
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273
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if our_val not in allowed_selectors: |
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274
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msg = ( |
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275
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"Value '{var_id}' in profile '{profile_name}' " |
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276
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"uses the selector '{our_val}'. " |
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277
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"This is not possible, as only selectors {all_selectors} are available. " |
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278
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"Either change the selector used in the profile, or " |
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279
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"add the selector-value pair to the variable definition." |
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280
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.format( |
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281
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var_id=var_id, profile_name=self.id_, our_val=our_val, |
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282
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all_selectors=allowed_selectors, |
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283
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) |
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284
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) |
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285
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raise ValueError(msg) |
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286
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287
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2 |
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def validate_rules(self, rules, groups): |
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288
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existing_rule_ids = [r.id_ for r in rules] |
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289
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rule_selectors = self.get_rule_selectors() |
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290
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for id_ in rule_selectors: |
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291
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if id_ in groups: |
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292
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msg = ( |
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293
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"You have selected a group '{group_id}' instead of a " |
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294
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"rule. Groups have no effect in the profile and are not " |
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295
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"allowed to be selected. Please remove '{group_id}' " |
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296
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"from profile '{profile_id}' before proceeding." |
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297
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.format(group_id=id_, profile_id=self.id_) |
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298
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) |
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299
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raise ValueError(msg) |
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300
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if id_ not in existing_rule_ids: |
|
301
|
|
|
msg = ( |
|
302
|
|
|
"Rule '{rule_id}' was not found in the benchmark. Please " |
|
303
|
|
|
"remove rule '{rule_id}' from profile '{profile_id}' " |
|
304
|
|
|
"before proceeding." |
|
305
|
|
|
.format(rule_id=id_, profile_id=self.id_) |
|
306
|
|
|
) |
|
307
|
|
|
raise ValueError(msg) |
|
308
|
|
|
|
|
309
|
2 |
|
def __sub__(self, other): |
|
310
|
|
|
profile = Profile(self.id_) |
|
311
|
|
|
profile.title = self.title |
|
312
|
|
|
profile.description = self.description |
|
313
|
|
|
profile.extends = self.extends |
|
314
|
|
|
profile.selected = list(set(self.selected) - set(other.selected)) |
|
315
|
|
|
profile.selected.sort() |
|
316
|
|
|
profile.unselected = list(set(self.unselected) - set(other.unselected)) |
|
317
|
|
|
profile.variables = dict ((k, v) for (k, v) in self.variables.items() |
|
318
|
|
|
if k not in other.variables or v != other.variables[k]) |
|
319
|
|
|
return profile |
|
320
|
|
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|
321
|
|
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|
|
322
|
2 |
|
class Value(object): |
|
323
|
|
|
"""Represents XCCDF Value |
|
324
|
|
|
""" |
|
325
|
|
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|
|
326
|
2 |
|
def __init__(self, id_): |
|
327
|
2 |
|
self.id_ = id_ |
|
328
|
2 |
|
self.title = "" |
|
329
|
2 |
|
self.description = "" |
|
330
|
2 |
|
self.type_ = "string" |
|
331
|
2 |
|
self.operator = "equals" |
|
332
|
2 |
|
self.interactive = False |
|
333
|
2 |
|
self.options = {} |
|
334
|
2 |
|
self.warnings = [] |
|
335
|
|
|
|
|
336
|
2 |
|
@staticmethod |
|
337
|
2 |
|
def from_yaml(yaml_file, env_yaml=None): |
|
338
|
2 |
|
yaml_contents = open_and_macro_expand(yaml_file, env_yaml) |
|
339
|
2 |
|
if yaml_contents is None: |
|
340
|
|
|
return None |
|
341
|
|
|
|
|
342
|
2 |
|
value_id, _ = os.path.splitext(os.path.basename(yaml_file)) |
|
343
|
2 |
|
value = Value(value_id) |
|
344
|
2 |
|
value.title = required_key(yaml_contents, "title") |
|
345
|
2 |
|
del yaml_contents["title"] |
|
346
|
2 |
|
value.description = required_key(yaml_contents, "description") |
|
347
|
2 |
|
del yaml_contents["description"] |
|
348
|
2 |
|
value.type_ = required_key(yaml_contents, "type") |
|
349
|
2 |
|
del yaml_contents["type"] |
|
350
|
2 |
|
value.operator = yaml_contents.pop("operator", "equals") |
|
351
|
2 |
|
possible_operators = ["equals", "not equal", "greater than", |
|
352
|
|
|
"less than", "greater than or equal", |
|
353
|
|
|
"less than or equal", "pattern match"] |
|
354
|
|
|
|
|
355
|
2 |
|
if value.operator not in possible_operators: |
|
356
|
|
|
raise ValueError( |
|
357
|
|
|
"Found an invalid operator value '%s' in '%s'. " |
|
358
|
|
|
"Expected one of: %s" |
|
359
|
|
|
% (value.operator, yaml_file, ", ".join(possible_operators)) |
|
360
|
|
|
) |
|
361
|
|
|
|
|
362
|
2 |
|
value.interactive = \ |
|
363
|
|
|
yaml_contents.pop("interactive", "false").lower() == "true" |
|
364
|
|
|
|
|
365
|
2 |
|
value.options = required_key(yaml_contents, "options") |
|
366
|
2 |
|
del yaml_contents["options"] |
|
367
|
2 |
|
value.warnings = yaml_contents.pop("warnings", []) |
|
368
|
|
|
|
|
369
|
2 |
|
for warning_list in value.warnings: |
|
370
|
|
|
if len(warning_list) != 1: |
|
371
|
|
|
raise ValueError("Only one key/value pair should exist for each dictionary") |
|
372
|
|
|
|
|
373
|
2 |
|
if yaml_contents: |
|
374
|
|
|
raise RuntimeError("Unparsed YAML data in '%s'.\n\n%s" |
|
375
|
|
|
% (yaml_file, yaml_contents)) |
|
376
|
|
|
|
|
377
|
2 |
|
return value |
|
378
|
|
|
|
|
379
|
2 |
|
def to_xml_element(self): |
|
380
|
|
|
value = ET.Element('Value') |
|
381
|
|
|
value.set('id', self.id_) |
|
382
|
|
|
value.set('type', self.type_) |
|
383
|
|
|
if self.operator != "equals": # equals is the default |
|
384
|
|
|
value.set('operator', self.operator) |
|
385
|
|
|
if self.interactive: # False is the default |
|
386
|
|
|
value.set('interactive', 'true') |
|
387
|
|
|
title = ET.SubElement(value, 'title') |
|
388
|
|
|
title.text = self.title |
|
389
|
|
|
add_sub_element(value, 'description', self.description) |
|
390
|
|
|
add_warning_elements(value, self.warnings) |
|
391
|
|
|
|
|
392
|
|
|
for selector, option in self.options.items(): |
|
393
|
|
|
# do not confuse Value with big V with value with small v |
|
394
|
|
|
# value is child element of Value |
|
395
|
|
|
value_small = ET.SubElement(value, 'value') |
|
396
|
|
|
# by XCCDF spec, default value is value without selector |
|
397
|
|
|
if selector != "default": |
|
398
|
|
|
value_small.set('selector', str(selector)) |
|
399
|
|
|
value_small.text = str(option) |
|
400
|
|
|
|
|
401
|
|
|
return value |
|
402
|
|
|
|
|
403
|
2 |
|
def to_file(self, file_name): |
|
404
|
|
|
root = self.to_xml_element() |
|
405
|
|
|
tree = ET.ElementTree(root) |
|
406
|
|
|
tree.write(file_name) |
|
407
|
|
|
|
|
408
|
|
|
|
|
409
|
2 |
|
class Benchmark(object): |
|
410
|
|
|
"""Represents XCCDF Benchmark |
|
411
|
|
|
""" |
|
412
|
2 |
|
def __init__(self, id_): |
|
413
|
|
|
self.id_ = id_ |
|
414
|
|
|
self.title = "" |
|
415
|
|
|
self.status = "" |
|
416
|
|
|
self.description = "" |
|
417
|
|
|
self.notice_id = "" |
|
418
|
|
|
self.notice_description = "" |
|
419
|
|
|
self.front_matter = "" |
|
420
|
|
|
self.rear_matter = "" |
|
421
|
|
|
self.cpes = [] |
|
422
|
|
|
self.version = "0.1" |
|
423
|
|
|
self.profiles = [] |
|
424
|
|
|
self.values = {} |
|
425
|
|
|
self.bash_remediation_fns_group = None |
|
426
|
|
|
self.groups = {} |
|
427
|
|
|
self.rules = {} |
|
428
|
|
|
|
|
429
|
|
|
# This is required for OCIL clauses |
|
430
|
|
|
conditional_clause = Value("conditional_clause") |
|
431
|
|
|
conditional_clause.title = "A conditional clause for check statements." |
|
432
|
|
|
conditional_clause.description = conditional_clause.title |
|
433
|
|
|
conditional_clause.type_ = "string" |
|
434
|
|
|
conditional_clause.options = {"": "This is a placeholder"} |
|
435
|
|
|
|
|
436
|
|
|
self.add_value(conditional_clause) |
|
437
|
|
|
|
|
438
|
2 |
|
@classmethod |
|
439
|
2 |
|
def from_yaml(cls, yaml_file, id_, product_yaml=None): |
|
440
|
|
|
yaml_contents = open_and_macro_expand(yaml_file, product_yaml) |
|
441
|
|
|
if yaml_contents is None: |
|
442
|
|
|
return None |
|
443
|
|
|
|
|
444
|
|
|
benchmark = cls(id_) |
|
445
|
|
|
benchmark.title = required_key(yaml_contents, "title") |
|
446
|
|
|
del yaml_contents["title"] |
|
447
|
|
|
benchmark.status = required_key(yaml_contents, "status") |
|
448
|
|
|
del yaml_contents["status"] |
|
449
|
|
|
benchmark.description = required_key(yaml_contents, "description") |
|
450
|
|
|
del yaml_contents["description"] |
|
451
|
|
|
notice_contents = required_key(yaml_contents, "notice") |
|
452
|
|
|
benchmark.notice_id = required_key(notice_contents, "id") |
|
453
|
|
|
del notice_contents["id"] |
|
454
|
|
|
benchmark.notice_description = required_key(notice_contents, |
|
455
|
|
|
"description") |
|
456
|
|
|
del notice_contents["description"] |
|
457
|
|
|
if not notice_contents: |
|
458
|
|
|
del yaml_contents["notice"] |
|
459
|
|
|
|
|
460
|
|
|
benchmark.front_matter = required_key(yaml_contents, |
|
461
|
|
|
"front-matter") |
|
462
|
|
|
del yaml_contents["front-matter"] |
|
463
|
|
|
benchmark.rear_matter = required_key(yaml_contents, |
|
464
|
|
|
"rear-matter") |
|
465
|
|
|
del yaml_contents["rear-matter"] |
|
466
|
|
|
benchmark.version = str(required_key(yaml_contents, "version")) |
|
467
|
|
|
del yaml_contents["version"] |
|
468
|
|
|
|
|
469
|
|
|
if yaml_contents: |
|
470
|
|
|
raise RuntimeError("Unparsed YAML data in '%s'.\n\n%s" |
|
471
|
|
|
% (yaml_file, yaml_contents)) |
|
472
|
|
|
|
|
473
|
|
|
if product_yaml: |
|
474
|
|
|
benchmark.cpes = PRODUCT_TO_CPE_MAPPING[product_yaml["product"]] |
|
475
|
|
|
|
|
476
|
|
|
return benchmark |
|
477
|
|
|
|
|
478
|
2 |
|
def add_profiles_from_dir(self, action, dir_, env_yaml): |
|
479
|
|
|
for dir_item in os.listdir(dir_): |
|
480
|
|
|
dir_item_path = os.path.join(dir_, dir_item) |
|
481
|
|
|
if not os.path.isfile(dir_item_path): |
|
482
|
|
|
continue |
|
483
|
|
|
|
|
484
|
|
|
_, ext = os.path.splitext(os.path.basename(dir_item_path)) |
|
485
|
|
|
if ext != '.profile': |
|
486
|
|
|
sys.stderr.write( |
|
487
|
|
|
"Encountered file '%s' while looking for profiles, " |
|
488
|
|
|
"extension '%s' is unknown. Skipping..\n" |
|
489
|
|
|
% (dir_item, ext) |
|
490
|
|
|
) |
|
491
|
|
|
continue |
|
492
|
|
|
|
|
493
|
|
|
try: |
|
494
|
|
|
new_profile = Profile.from_yaml(dir_item_path, env_yaml) |
|
495
|
|
|
except DocumentationNotComplete: |
|
496
|
|
|
continue |
|
497
|
|
|
except Exception as exc: |
|
498
|
|
|
msg = ("Error building profile from '{fname}': '{error}'" |
|
499
|
|
|
.format(fname=dir_item_path, error=str(exc))) |
|
500
|
|
|
raise RuntimeError(msg) |
|
501
|
|
|
if new_profile is None: |
|
502
|
|
|
continue |
|
503
|
|
|
|
|
504
|
|
|
self.profiles.append(new_profile) |
|
505
|
|
|
if action == "list-inputs": |
|
506
|
|
|
print(dir_item_path) |
|
507
|
|
|
|
|
508
|
2 |
|
def add_bash_remediation_fns_from_file(self, action, file_): |
|
509
|
|
|
if not file_: |
|
510
|
|
|
# bash-remediation-functions.xml doens't exist |
|
511
|
|
|
return |
|
512
|
|
|
|
|
513
|
|
|
if action == "list-inputs": |
|
514
|
|
|
print(file_) |
|
515
|
|
|
else: |
|
516
|
|
|
tree = ET.parse(file_) |
|
517
|
|
|
self.bash_remediation_fns_group = tree.getroot() |
|
518
|
|
|
|
|
519
|
2 |
|
def to_xml_element(self): |
|
520
|
|
|
root = ET.Element('Benchmark') |
|
521
|
|
|
root.set('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance') |
|
522
|
|
|
root.set('xmlns:xhtml', 'http://www.w3.org/1999/xhtml') |
|
523
|
|
|
root.set('xmlns:dc', 'http://purl.org/dc/elements/1.1/') |
|
524
|
|
|
root.set('id', 'product-name') |
|
525
|
|
|
root.set('xsi:schemaLocation', |
|
526
|
|
|
'http://checklists.nist.gov/xccdf/1.1 xccdf-1.1.4.xsd') |
|
527
|
|
|
root.set('style', 'SCAP_1.1') |
|
528
|
|
|
root.set('resolved', 'false') |
|
529
|
|
|
root.set('xml:lang', 'en-US') |
|
530
|
|
|
status = ET.SubElement(root, 'status') |
|
531
|
|
|
status.set('date', datetime.date.today().strftime("%Y-%m-%d")) |
|
532
|
|
|
status.text = self.status |
|
533
|
|
|
add_sub_element(root, "title", self.title) |
|
534
|
|
|
add_sub_element(root, "description", self.description) |
|
535
|
|
|
notice = add_sub_element(root, "notice", self.notice_description) |
|
536
|
|
|
notice.set('id', self.notice_id) |
|
537
|
|
|
add_sub_element(root, "front-matter", self.front_matter) |
|
538
|
|
|
add_sub_element(root, "rear-matter", self.rear_matter) |
|
539
|
|
|
|
|
540
|
|
|
for idref in self.cpes: |
|
541
|
|
|
plat = ET.SubElement(root, "platform") |
|
542
|
|
|
plat.set("idref", idref) |
|
543
|
|
|
|
|
544
|
|
|
version = ET.SubElement(root, 'version') |
|
545
|
|
|
version.text = self.version |
|
546
|
|
|
ET.SubElement(root, "metadata") |
|
547
|
|
|
|
|
548
|
|
|
for profile in self.profiles: |
|
549
|
|
|
root.append(profile.to_xml_element()) |
|
550
|
|
|
|
|
551
|
|
|
for value in self.values.values(): |
|
552
|
|
|
root.append(value.to_xml_element()) |
|
553
|
|
|
if self.bash_remediation_fns_group is not None: |
|
554
|
|
|
root.append(self.bash_remediation_fns_group) |
|
555
|
|
|
|
|
556
|
|
|
groups_in_bench = list(self.groups.keys()) |
|
557
|
|
|
priority_order = ["system", "services"] |
|
558
|
|
|
groups_in_bench = reorder_according_to_ordering(groups_in_bench, priority_order) |
|
559
|
|
|
|
|
560
|
|
|
# Make system group the first, followed by services group |
|
561
|
|
|
for group_id in groups_in_bench: |
|
562
|
|
|
group = self.groups.get(group_id) |
|
563
|
|
|
# Products using application benchmark don't have system or services group |
|
564
|
|
|
if group is not None: |
|
565
|
|
|
root.append(group.to_xml_element()) |
|
566
|
|
|
|
|
567
|
|
|
for rule in self.rules.values(): |
|
568
|
|
|
root.append(rule.to_xml_element()) |
|
569
|
|
|
|
|
570
|
|
|
return root |
|
571
|
|
|
|
|
572
|
2 |
|
def to_file(self, file_name): |
|
573
|
|
|
root = self.to_xml_element() |
|
574
|
|
|
tree = ET.ElementTree(root) |
|
575
|
|
|
tree.write(file_name) |
|
576
|
|
|
|
|
577
|
2 |
|
def add_value(self, value): |
|
578
|
|
|
if value is None: |
|
579
|
|
|
return |
|
580
|
|
|
self.values[value.id_] = value |
|
581
|
|
|
|
|
582
|
2 |
|
def add_group(self, group): |
|
583
|
|
|
if group is None: |
|
584
|
|
|
return |
|
585
|
|
|
self.groups[group.id_] = group |
|
586
|
|
|
|
|
587
|
2 |
|
def add_rule(self, rule): |
|
588
|
|
|
if rule is None: |
|
589
|
|
|
return |
|
590
|
|
|
self.rules[rule.id_] = rule |
|
591
|
|
|
|
|
592
|
2 |
|
def to_xccdf(self): |
|
593
|
|
|
"""We can easily extend this script to generate a valid XCCDF instead |
|
594
|
|
|
of SSG SHORTHAND. |
|
595
|
|
|
""" |
|
596
|
|
|
raise NotImplementedError |
|
597
|
|
|
|
|
598
|
2 |
|
def __str__(self): |
|
599
|
|
|
return self.id_ |
|
600
|
|
|
|
|
601
|
|
|
|
|
602
|
2 |
|
class Group(object): |
|
603
|
|
|
"""Represents XCCDF Group |
|
604
|
|
|
""" |
|
605
|
2 |
|
ATTRIBUTES_TO_PASS_ON = ( |
|
606
|
|
|
"platform", |
|
607
|
|
|
) |
|
608
|
|
|
|
|
609
|
2 |
|
def __init__(self, id_): |
|
610
|
|
|
self.id_ = id_ |
|
611
|
|
|
self.prodtype = "all" |
|
612
|
|
|
self.title = "" |
|
613
|
|
|
self.description = "" |
|
614
|
|
|
self.warnings = [] |
|
615
|
|
|
self.requires = [] |
|
616
|
|
|
self.conflicts = [] |
|
617
|
|
|
self.values = {} |
|
618
|
|
|
self.groups = {} |
|
619
|
|
|
self.rules = {} |
|
620
|
|
|
self.platform = None |
|
621
|
|
|
|
|
622
|
2 |
|
@classmethod |
|
623
|
2 |
|
def from_yaml(cls, yaml_file, env_yaml=None): |
|
624
|
|
|
yaml_contents = open_and_macro_expand(yaml_file, env_yaml) |
|
625
|
|
|
if yaml_contents is None: |
|
626
|
|
|
return None |
|
627
|
|
|
|
|
628
|
|
|
group_id = os.path.basename(os.path.dirname(yaml_file)) |
|
629
|
|
|
group = cls(group_id) |
|
630
|
|
|
group.prodtype = yaml_contents.pop("prodtype", "all") |
|
631
|
|
|
group.title = required_key(yaml_contents, "title") |
|
632
|
|
|
del yaml_contents["title"] |
|
633
|
|
|
group.description = required_key(yaml_contents, "description") |
|
634
|
|
|
del yaml_contents["description"] |
|
635
|
|
|
group.warnings = yaml_contents.pop("warnings", []) |
|
636
|
|
|
group.conflicts = yaml_contents.pop("conflicts", []) |
|
637
|
|
|
group.requires = yaml_contents.pop("requires", []) |
|
638
|
|
|
group.platform = yaml_contents.pop("platform", None) |
|
639
|
|
|
|
|
640
|
|
|
for warning_list in group.warnings: |
|
641
|
|
|
if len(warning_list) != 1: |
|
642
|
|
|
raise ValueError("Only one key/value pair should exist for each dictionary") |
|
643
|
|
|
|
|
644
|
|
|
if yaml_contents: |
|
645
|
|
|
raise RuntimeError("Unparsed YAML data in '%s'.\n\n%s" |
|
646
|
|
|
% (yaml_file, yaml_contents)) |
|
647
|
|
|
group.validate_prodtype(yaml_file) |
|
648
|
|
|
return group |
|
649
|
|
|
|
|
650
|
2 |
|
def validate_prodtype(self, yaml_file): |
|
651
|
|
|
for ptype in self.prodtype.split(","): |
|
652
|
|
|
if ptype.strip() != ptype: |
|
653
|
|
|
msg = ( |
|
654
|
|
|
"Comma-separated '{prodtype}' prodtype " |
|
655
|
|
|
"in {yaml_file} contains whitespace." |
|
656
|
|
|
.format(prodtype=self.prodtype, yaml_file=yaml_file)) |
|
657
|
|
|
raise ValueError(msg) |
|
658
|
|
|
|
|
659
|
2 |
|
def to_xml_element(self): |
|
660
|
|
|
group = ET.Element('Group') |
|
661
|
|
|
group.set('id', self.id_) |
|
662
|
|
|
if self.prodtype != "all": |
|
663
|
|
|
group.set("prodtype", self.prodtype) |
|
664
|
|
|
title = ET.SubElement(group, 'title') |
|
665
|
|
|
title.text = self.title |
|
666
|
|
|
add_sub_element(group, 'description', self.description) |
|
667
|
|
|
add_warning_elements(group, self.warnings) |
|
668
|
|
|
add_nondata_subelements(group, "requires", "id", self.requires) |
|
669
|
|
|
add_nondata_subelements(group, "conflicts", "id", self.conflicts) |
|
670
|
|
|
|
|
671
|
|
|
if self.platform: |
|
672
|
|
|
platform_el = ET.SubElement(group, "platform") |
|
673
|
|
|
try: |
|
674
|
|
|
platform_cpe = XCCDF_PLATFORM_TO_CPE[self.platform] |
|
675
|
|
|
except KeyError: |
|
676
|
|
|
raise ValueError("Unsupported platform '%s' in rule '%s'." % (self.platform, self.id_)) |
|
677
|
|
|
platform_el.set("idref", platform_cpe) |
|
678
|
|
|
|
|
679
|
|
|
for _value in self.values.values(): |
|
680
|
|
|
group.append(_value.to_xml_element()) |
|
681
|
|
|
|
|
682
|
|
|
# Rules that install or remove packages affect remediation |
|
683
|
|
|
# of other rules. |
|
684
|
|
|
# When packages installed/removed rules come first: |
|
685
|
|
|
# The Rules are ordered in more logical way, and |
|
686
|
|
|
# remediation order is natural, first the package is installed, then configured. |
|
687
|
|
|
rules_in_group = list(self.rules.keys()) |
|
688
|
|
|
regex = r'(package_.*_(installed|removed))|(service_.*_(enabled|disabled))$' |
|
689
|
|
|
priority_order = ["installed", "removed", "enabled", "disabled"] |
|
690
|
|
|
rules_in_group = reorder_according_to_ordering(rules_in_group, priority_order, regex) |
|
691
|
|
|
|
|
692
|
|
|
# Add rules in priority order, first all packages installed, then removed, |
|
693
|
|
|
# followed by services enabled, then disabled |
|
694
|
|
|
for rule_id in rules_in_group: |
|
695
|
|
|
group.append(self.rules.get(rule_id).to_xml_element()) |
|
696
|
|
|
|
|
697
|
|
|
# Add the sub groups after any current level group rules. |
|
698
|
|
|
# As package installed/removed and service enabled/disabled rules are usuallly in |
|
699
|
|
|
# top level group, this ensures groups that further configure a package or service |
|
700
|
|
|
# are after rules that install or remove it. |
|
701
|
|
|
groups_in_group = list(self.groups.keys()) |
|
702
|
|
|
# The account group has to precede audit group because |
|
703
|
|
|
# the rule package_screen_installed is desired to be executed before the rule |
|
704
|
|
|
# audit_rules_privileged_commands, othervise the rule |
|
705
|
|
|
# does not catch newly installed screeen binary during remediation |
|
706
|
|
|
# and report fail |
|
707
|
|
|
# the software group should come before the |
|
708
|
|
|
# bootloader-grub2 group because of conflict between |
|
709
|
|
|
# rules rpm_verify_permissions and file_permissions_grub2_cfg |
|
710
|
|
|
# specific rules concerning permissions should |
|
711
|
|
|
# be applied after the general rpm_verify_permissions |
|
712
|
|
|
# The FIPS group should come before Crypto - if we want to set a different (stricter) Crypto Policy than FIPS. |
|
713
|
|
|
# the firewalld_activation must come before ruleset_modifications, othervise |
|
714
|
|
|
# remediations for ruleset_modifications won't work |
|
715
|
|
|
# rules from group disabling_ipv6 must precede rules from configuring_ipv6, |
|
716
|
|
|
# otherwise the remediation prints error although it is successful |
|
717
|
|
|
priority_order = [ |
|
718
|
|
|
"accounts", "auditing", |
|
719
|
|
|
"software", "bootloader-grub2", |
|
720
|
|
|
"fips", "crypto", |
|
721
|
|
|
"firewalld_activation", "ruleset_modifications", |
|
722
|
|
|
"disabling_ipv6", "configuring_ipv6" |
|
723
|
|
|
] |
|
724
|
|
|
groups_in_group = reorder_according_to_ordering(groups_in_group, priority_order) |
|
725
|
|
|
for group_id in groups_in_group: |
|
726
|
|
|
_group = self.groups[group_id] |
|
727
|
|
|
group.append(_group.to_xml_element()) |
|
728
|
|
|
|
|
729
|
|
|
return group |
|
730
|
|
|
|
|
731
|
2 |
|
def to_file(self, file_name): |
|
732
|
|
|
root = self.to_xml_element() |
|
733
|
|
|
tree = ET.ElementTree(root) |
|
734
|
|
|
tree.write(file_name) |
|
735
|
|
|
|
|
736
|
2 |
|
def add_value(self, value): |
|
737
|
|
|
if value is None: |
|
738
|
|
|
return |
|
739
|
|
|
self.values[value.id_] = value |
|
740
|
|
|
|
|
741
|
2 |
|
def add_group(self, group): |
|
742
|
|
|
if group is None: |
|
743
|
|
|
return |
|
744
|
|
|
if self.platform and not group.platform: |
|
745
|
|
|
group.platform = self.platform |
|
746
|
|
|
self.groups[group.id_] = group |
|
747
|
|
|
self._pass_our_properties_on_to(group) |
|
748
|
|
|
|
|
749
|
2 |
|
def _pass_our_properties_on_to(self, obj): |
|
750
|
|
|
for attr in self.ATTRIBUTES_TO_PASS_ON: |
|
751
|
|
|
if hasattr(obj, attr) and getattr(obj, attr) is None: |
|
752
|
|
|
setattr(obj, attr, getattr(self, attr)) |
|
753
|
|
|
|
|
754
|
2 |
|
def add_rule(self, rule): |
|
755
|
|
|
if rule is None: |
|
756
|
|
|
return |
|
757
|
|
|
if self.platform and not rule.platform: |
|
758
|
|
|
rule.platform = self.platform |
|
759
|
|
|
self.rules[rule.id_] = rule |
|
760
|
|
|
self._pass_our_properties_on_to(rule) |
|
761
|
|
|
|
|
762
|
2 |
|
def __str__(self): |
|
763
|
|
|
return self.id_ |
|
764
|
|
|
|
|
765
|
|
|
|
|
766
|
2 |
|
class Rule(object): |
|
767
|
|
|
"""Represents XCCDF Rule |
|
768
|
|
|
""" |
|
769
|
2 |
|
YAML_KEYS_DEFAULTS = { |
|
770
|
|
|
"prodtype": lambda: "all", |
|
771
|
|
|
"title": lambda: RuntimeError("Missing key 'title'"), |
|
772
|
|
|
"description": lambda: RuntimeError("Missing key 'description'"), |
|
773
|
|
|
"rationale": lambda: RuntimeError("Missing key 'rationale'"), |
|
774
|
|
|
"severity": lambda: RuntimeError("Missing key 'severity'"), |
|
775
|
|
|
"references": lambda: dict(), |
|
776
|
|
|
"identifiers": lambda: dict(), |
|
777
|
|
|
"ocil_clause": lambda: None, |
|
778
|
|
|
"ocil": lambda: None, |
|
779
|
|
|
"oval_external_content": lambda: None, |
|
780
|
|
|
"warnings": lambda: list(), |
|
781
|
|
|
"conflicts": lambda: list(), |
|
782
|
|
|
"requires": lambda: list(), |
|
783
|
|
|
"platform": lambda: None, |
|
784
|
|
|
"template": lambda: None, |
|
785
|
|
|
} |
|
786
|
|
|
|
|
787
|
2 |
|
def __init__(self, id_): |
|
788
|
2 |
|
self.id_ = id_ |
|
789
|
2 |
|
self.prodtype = "all" |
|
790
|
2 |
|
self.title = "" |
|
791
|
2 |
|
self.description = "" |
|
792
|
2 |
|
self.rationale = "" |
|
793
|
2 |
|
self.severity = "unknown" |
|
794
|
2 |
|
self.references = {} |
|
795
|
2 |
|
self.identifiers = {} |
|
796
|
2 |
|
self.ocil_clause = None |
|
797
|
2 |
|
self.ocil = None |
|
798
|
2 |
|
self.oval_external_content = None |
|
799
|
2 |
|
self.warnings = [] |
|
800
|
2 |
|
self.requires = [] |
|
801
|
2 |
|
self.conflicts = [] |
|
802
|
2 |
|
self.platform = None |
|
803
|
2 |
|
self.template = None |
|
804
|
|
|
|
|
805
|
2 |
|
@classmethod |
|
806
|
2 |
|
def from_yaml(cls, yaml_file, env_yaml=None): |
|
807
|
2 |
|
yaml_file = os.path.normpath(yaml_file) |
|
808
|
|
|
|
|
809
|
2 |
|
yaml_contents = open_and_macro_expand(yaml_file, env_yaml) |
|
810
|
2 |
|
if yaml_contents is None: |
|
811
|
|
|
return None |
|
812
|
|
|
|
|
813
|
2 |
|
rule_id, ext = os.path.splitext(os.path.basename(yaml_file)) |
|
814
|
2 |
|
if rule_id == "rule" and ext == ".yml": |
|
815
|
2 |
|
rule_id = get_rule_dir_id(yaml_file) |
|
816
|
|
|
|
|
817
|
2 |
|
rule = cls(rule_id) |
|
818
|
|
|
|
|
819
|
2 |
|
try: |
|
820
|
2 |
|
rule._set_attributes_from_dict(yaml_contents) |
|
821
|
|
|
except RuntimeError as exc: |
|
822
|
|
|
msg = ("Error processing '{fname}': {err}" |
|
823
|
|
|
.format(fname=yaml_file, err=str(exc))) |
|
824
|
|
|
raise RuntimeError(msg) |
|
825
|
|
|
|
|
826
|
2 |
|
for warning_list in rule.warnings: |
|
827
|
|
|
if len(warning_list) != 1: |
|
828
|
|
|
raise ValueError("Only one key/value pair should exist for each dictionary") |
|
829
|
|
|
|
|
830
|
2 |
|
if yaml_contents: |
|
831
|
|
|
raise RuntimeError("Unparsed YAML data in '%s'.\n\n%s" |
|
832
|
|
|
% (yaml_file, yaml_contents)) |
|
833
|
|
|
|
|
834
|
2 |
|
rule.validate_prodtype(yaml_file) |
|
835
|
2 |
|
rule.validate_identifiers(yaml_file) |
|
836
|
2 |
|
rule.validate_references(yaml_file) |
|
837
|
2 |
|
return rule |
|
838
|
|
|
|
|
839
|
2 |
|
def _make_stigid_product_specific(self, product): |
|
840
|
2 |
|
stig_id = self.references.get("stigid", None) |
|
841
|
2 |
|
if not stig_id: |
|
842
|
2 |
|
return |
|
843
|
2 |
|
if "," in stig_id: |
|
844
|
2 |
|
raise ValueError("Rules can not have multiple STIG IDs.") |
|
845
|
2 |
|
stig_platform_id = STIG_PLATFORM_ID_MAP.get(product, product.upper()) |
|
846
|
2 |
|
product_specific_stig_id = "{platform_id}-{stig_id}".format( |
|
847
|
|
|
platform_id=stig_platform_id, stig_id=stig_id) |
|
848
|
2 |
|
self.references["stigid"] = product_specific_stig_id |
|
849
|
|
|
|
|
850
|
2 |
|
def normalize(self, product): |
|
851
|
2 |
|
try: |
|
852
|
2 |
|
self.make_refs_and_identifiers_product_specific(product) |
|
853
|
2 |
|
self.make_template_product_specific(product) |
|
854
|
2 |
|
except Exception as exc: |
|
855
|
2 |
|
msg = ( |
|
856
|
|
|
"Error normalizing '{rule}': {msg}" |
|
857
|
|
|
.format(rule=self.id_, msg=str(exc)) |
|
858
|
|
|
) |
|
859
|
2 |
|
raise RuntimeError(msg) |
|
860
|
|
|
|
|
861
|
2 |
|
def _get_product_only_references(self): |
|
862
|
2 |
|
PRODUCT_REFERENCES = ("stigid",) |
|
863
|
|
|
|
|
864
|
2 |
|
product_references = dict() |
|
865
|
|
|
|
|
866
|
2 |
|
for ref in PRODUCT_REFERENCES: |
|
867
|
2 |
|
start = "{0}@".format(ref) |
|
868
|
2 |
|
for gref, gval in self.references.items(): |
|
869
|
2 |
|
if ref == gref or gref.startswith(start): |
|
870
|
2 |
|
product_references[gref] = gval |
|
871
|
2 |
|
return product_references |
|
872
|
|
|
|
|
873
|
2 |
|
def make_template_product_specific(self, product): |
|
874
|
2 |
|
product_suffix = "@{0}".format(product) |
|
875
|
|
|
|
|
876
|
2 |
|
if not self.template: |
|
877
|
|
|
return |
|
878
|
|
|
|
|
879
|
2 |
|
not_specific_vars = self.template.get("vars", dict()) |
|
880
|
2 |
|
specific_vars = self._make_items_product_specific( |
|
881
|
|
|
not_specific_vars, product_suffix, True) |
|
882
|
2 |
|
self.template["vars"] = specific_vars |
|
883
|
|
|
|
|
884
|
2 |
|
not_specific_backends = self.template.get("backends", dict()) |
|
885
|
2 |
|
specific_backends = self._make_items_product_specific( |
|
886
|
|
|
not_specific_backends, product_suffix, True) |
|
887
|
2 |
|
self.template["backends"] = specific_backends |
|
888
|
|
|
|
|
889
|
2 |
|
def make_refs_and_identifiers_product_specific(self, product): |
|
890
|
2 |
|
product_suffix = "@{0}".format(product) |
|
891
|
|
|
|
|
892
|
2 |
|
product_references = self._get_product_only_references() |
|
893
|
2 |
|
general_references = self.references.copy() |
|
894
|
2 |
|
for todel in product_references: |
|
895
|
2 |
|
general_references.pop(todel) |
|
896
|
|
|
|
|
897
|
2 |
|
to_set = dict( |
|
898
|
|
|
identifiers=(self.identifiers, False), |
|
899
|
|
|
general_references=(general_references, True), |
|
900
|
|
|
product_references=(product_references, False), |
|
901
|
|
|
) |
|
902
|
2 |
|
for name, (dic, allow_overwrites) in to_set.items(): |
|
903
|
2 |
|
try: |
|
904
|
2 |
|
new_items = self._make_items_product_specific( |
|
905
|
|
|
dic, product_suffix, allow_overwrites) |
|
906
|
2 |
|
except ValueError as exc: |
|
907
|
2 |
|
msg = ( |
|
908
|
|
|
"Error processing {what} for rule '{rid}': {msg}" |
|
909
|
|
|
.format(what=name, rid=self.id_, msg=str(exc)) |
|
910
|
|
|
) |
|
911
|
2 |
|
raise ValueError(msg) |
|
912
|
2 |
|
dic.clear() |
|
913
|
2 |
|
dic.update(new_items) |
|
914
|
|
|
|
|
915
|
2 |
|
self.references = general_references |
|
916
|
2 |
|
self.references.update(product_references) |
|
917
|
|
|
|
|
918
|
2 |
|
self._make_stigid_product_specific(product) |
|
919
|
|
|
|
|
920
|
2 |
|
def _make_items_product_specific(self, items_dict, product_suffix, allow_overwrites=False): |
|
921
|
2 |
|
new_items = dict() |
|
922
|
2 |
|
for full_label, value in items_dict.items(): |
|
923
|
2 |
|
if "@" not in full_label and full_label not in new_items: |
|
924
|
2 |
|
new_items[full_label] = value |
|
925
|
2 |
|
continue |
|
926
|
|
|
|
|
927
|
2 |
|
if not full_label.endswith(product_suffix): |
|
928
|
2 |
|
continue |
|
929
|
|
|
|
|
930
|
2 |
|
label = full_label.split("@")[0] |
|
931
|
2 |
|
if label in items_dict and not allow_overwrites and value != items_dict[label]: |
|
932
|
2 |
|
msg = ( |
|
933
|
|
|
"There is a product-qualified '{item_q}' item, " |
|
934
|
|
|
"but also an unqualified '{item_u}' item " |
|
935
|
|
|
"and those two differ in value - " |
|
936
|
|
|
"'{value_q}' vs '{value_u}' respectively." |
|
937
|
|
|
.format(item_q=full_label, item_u=label, |
|
938
|
|
|
value_q=value, value_u=items_dict[label]) |
|
939
|
|
|
) |
|
940
|
2 |
|
raise ValueError(msg) |
|
941
|
2 |
|
new_items[label] = value |
|
942
|
2 |
|
return new_items |
|
943
|
|
|
|
|
944
|
2 |
|
def _set_attributes_from_dict(self, yaml_contents): |
|
945
|
2 |
|
for key, default_getter in self.YAML_KEYS_DEFAULTS.items(): |
|
946
|
2 |
|
if key not in yaml_contents: |
|
947
|
2 |
|
value = default_getter() |
|
948
|
2 |
|
if isinstance(value, Exception): |
|
949
|
|
|
raise value |
|
950
|
|
|
else: |
|
951
|
2 |
|
value = yaml_contents.pop(key) |
|
952
|
|
|
|
|
953
|
2 |
|
setattr(self, key, value) |
|
954
|
|
|
|
|
955
|
2 |
|
def to_contents_dict(self): |
|
956
|
|
|
""" |
|
957
|
|
|
Returns a dictionary that is the same schema as the dict obtained when loading rule YAML. |
|
958
|
|
|
""" |
|
959
|
|
|
|
|
960
|
2 |
|
yaml_contents = dict() |
|
961
|
2 |
|
for key in Rule.YAML_KEYS_DEFAULTS: |
|
962
|
2 |
|
yaml_contents[key] = getattr(self, key) |
|
963
|
|
|
|
|
964
|
2 |
|
return yaml_contents |
|
965
|
|
|
|
|
966
|
2 |
|
def validate_identifiers(self, yaml_file): |
|
967
|
2 |
|
if self.identifiers is None: |
|
968
|
|
|
raise ValueError("Empty identifier section in file %s" % yaml_file) |
|
969
|
|
|
|
|
970
|
|
|
# Validate all identifiers are non-empty: |
|
971
|
2 |
|
for ident_type, ident_val in self.identifiers.items(): |
|
972
|
2 |
|
if not isinstance(ident_type, str) or not isinstance(ident_val, str): |
|
973
|
|
|
raise ValueError("Identifiers and values must be strings: %s in file %s" |
|
974
|
|
|
% (ident_type, yaml_file)) |
|
975
|
2 |
|
if ident_val.strip() == "": |
|
976
|
|
|
raise ValueError("Identifiers must not be empty: %s in file %s" |
|
977
|
|
|
% (ident_type, yaml_file)) |
|
978
|
2 |
|
if ident_type[0:3] == 'cce': |
|
979
|
2 |
|
if not is_cce_format_valid("CCE-" + ident_val): |
|
980
|
|
|
raise ValueError("CCE Identifier format must be valid: invalid format '%s' for CEE '%s'" |
|
981
|
|
|
" in file '%s'" % (ident_val, ident_type, yaml_file)) |
|
982
|
2 |
|
if not is_cce_value_valid("CCE-" + ident_val): |
|
983
|
|
|
raise ValueError("CCE Identifier value is not a valid checksum: invalid value '%s' for CEE '%s'" |
|
984
|
|
|
" in file '%s'" % (ident_val, ident_type, yaml_file)) |
|
985
|
|
|
|
|
986
|
2 |
|
def validate_references(self, yaml_file): |
|
987
|
2 |
|
if self.references is None: |
|
988
|
|
|
raise ValueError("Empty references section in file %s" % yaml_file) |
|
989
|
|
|
|
|
990
|
2 |
|
for ref_type, ref_val in self.references.items(): |
|
991
|
2 |
|
if not isinstance(ref_type, str) or not isinstance(ref_val, str): |
|
992
|
|
|
raise ValueError("References and values must be strings: %s in file %s" |
|
993
|
|
|
% (ref_type, yaml_file)) |
|
994
|
2 |
|
if ref_val.strip() == "": |
|
995
|
|
|
raise ValueError("References must not be empty: %s in file %s" |
|
996
|
|
|
% (ref_type, yaml_file)) |
|
997
|
|
|
|
|
998
|
2 |
|
for ref_type, ref_val in self.references.items(): |
|
999
|
2 |
|
for ref in ref_val.split(","): |
|
1000
|
2 |
|
if ref.strip() != ref: |
|
1001
|
|
|
msg = ( |
|
1002
|
|
|
"Comma-separated '{ref_type}' reference " |
|
1003
|
|
|
"in {yaml_file} contains whitespace." |
|
1004
|
|
|
.format(ref_type=ref_type, yaml_file=yaml_file)) |
|
1005
|
|
|
raise ValueError(msg) |
|
1006
|
|
|
|
|
1007
|
2 |
|
def validate_prodtype(self, yaml_file): |
|
1008
|
2 |
|
for ptype in self.prodtype.split(","): |
|
1009
|
2 |
|
if ptype.strip() != ptype: |
|
1010
|
|
|
msg = ( |
|
1011
|
|
|
"Comma-separated '{prodtype}' prodtype " |
|
1012
|
|
|
"in {yaml_file} contains whitespace." |
|
1013
|
|
|
.format(prodtype=self.prodtype, yaml_file=yaml_file)) |
|
1014
|
|
|
raise ValueError(msg) |
|
1015
|
|
|
|
|
1016
|
2 |
|
def to_xml_element(self): |
|
1017
|
|
|
rule = ET.Element('Rule') |
|
1018
|
|
|
rule.set('id', self.id_) |
|
1019
|
|
|
if self.prodtype != "all": |
|
1020
|
|
|
rule.set("prodtype", self.prodtype) |
|
1021
|
|
|
rule.set('severity', self.severity) |
|
1022
|
|
|
add_sub_element(rule, 'title', self.title) |
|
1023
|
|
|
add_sub_element(rule, 'description', self.description) |
|
1024
|
|
|
add_sub_element(rule, 'rationale', self.rationale) |
|
1025
|
|
|
|
|
1026
|
|
|
main_ident = ET.Element('ident') |
|
1027
|
|
|
for ident_type, ident_val in self.identifiers.items(): |
|
1028
|
|
|
# This is not true if items were normalized |
|
1029
|
|
|
if '@' in ident_type: |
|
1030
|
|
|
# the ident is applicable only on some product |
|
1031
|
|
|
# format : 'policy@product', eg. 'stigid@product' |
|
1032
|
|
|
# for them, we create a separate <ref> element |
|
1033
|
|
|
policy, product = ident_type.split('@') |
|
1034
|
|
|
ident = ET.SubElement(rule, 'ident') |
|
1035
|
|
|
ident.set(policy, ident_val) |
|
1036
|
|
|
ident.set('prodtype', product) |
|
1037
|
|
|
else: |
|
1038
|
|
|
main_ident.set(ident_type, ident_val) |
|
1039
|
|
|
|
|
1040
|
|
|
if main_ident.attrib: |
|
1041
|
|
|
rule.append(main_ident) |
|
1042
|
|
|
|
|
1043
|
|
|
main_ref = ET.Element('ref') |
|
1044
|
|
|
for ref_type, ref_val in self.references.items(): |
|
1045
|
|
|
# This is not true if items were normalized |
|
1046
|
|
|
if '@' in ref_type: |
|
1047
|
|
|
# the reference is applicable only on some product |
|
1048
|
|
|
# format : 'policy@product', eg. 'stigid@product' |
|
1049
|
|
|
# for them, we create a separate <ref> element |
|
1050
|
|
|
policy, product = ref_type.split('@') |
|
1051
|
|
|
ref = ET.SubElement(rule, 'ref') |
|
1052
|
|
|
ref.set(policy, ref_val) |
|
1053
|
|
|
ref.set('prodtype', product) |
|
1054
|
|
|
else: |
|
1055
|
|
|
main_ref.set(ref_type, ref_val) |
|
1056
|
|
|
|
|
1057
|
|
|
if main_ref.attrib: |
|
1058
|
|
|
rule.append(main_ref) |
|
1059
|
|
|
|
|
1060
|
|
|
if self.oval_external_content: |
|
1061
|
|
|
check = ET.SubElement(rule, 'check') |
|
1062
|
|
|
check.set("system", "http://oval.mitre.org/XMLSchema/oval-definitions-5") |
|
1063
|
|
|
external_content = ET.SubElement(check, "check-content-ref") |
|
1064
|
|
|
external_content.set("href", self.oval_external_content) |
|
1065
|
|
|
else: |
|
1066
|
|
|
# TODO: This is pretty much a hack, oval ID will be the same as rule ID |
|
1067
|
|
|
# and we don't want the developers to have to keep them in sync. |
|
1068
|
|
|
# Therefore let's just add an OVAL ref of that ID. |
|
1069
|
|
|
oval_ref = ET.SubElement(rule, "oval") |
|
1070
|
|
|
oval_ref.set("id", self.id_) |
|
1071
|
|
|
|
|
1072
|
|
|
if self.ocil or self.ocil_clause: |
|
1073
|
|
|
ocil = add_sub_element(rule, 'ocil', self.ocil if self.ocil else "") |
|
1074
|
|
|
if self.ocil_clause: |
|
1075
|
|
|
ocil.set("clause", self.ocil_clause) |
|
1076
|
|
|
|
|
1077
|
|
|
add_warning_elements(rule, self.warnings) |
|
1078
|
|
|
add_nondata_subelements(rule, "requires", "id", self.requires) |
|
1079
|
|
|
add_nondata_subelements(rule, "conflicts", "id", self.conflicts) |
|
1080
|
|
|
|
|
1081
|
|
|
if self.platform: |
|
1082
|
|
|
platform_el = ET.SubElement(rule, "platform") |
|
1083
|
|
|
try: |
|
1084
|
|
|
platform_cpe = XCCDF_PLATFORM_TO_CPE[self.platform] |
|
1085
|
|
|
except KeyError: |
|
1086
|
|
|
raise ValueError("Unsupported platform '%s' in rule '%s'." % (self.platform, self.id_)) |
|
1087
|
|
|
platform_el.set("idref", platform_cpe) |
|
1088
|
|
|
|
|
1089
|
|
|
return rule |
|
1090
|
|
|
|
|
1091
|
2 |
|
def to_file(self, file_name): |
|
1092
|
|
|
root = self.to_xml_element() |
|
1093
|
|
|
tree = ET.ElementTree(root) |
|
1094
|
|
|
tree.write(file_name) |
|
1095
|
|
|
|
|
1096
|
|
|
|
|
1097
|
2 |
|
class DirectoryLoader(object): |
|
1098
|
2 |
|
def __init__(self, profiles_dir, bash_remediation_fns, env_yaml): |
|
1099
|
|
|
self.benchmark_file = None |
|
1100
|
|
|
self.group_file = None |
|
1101
|
|
|
self.loaded_group = None |
|
1102
|
|
|
self.rule_files = [] |
|
1103
|
|
|
self.value_files = [] |
|
1104
|
|
|
self.subdirectories = [] |
|
1105
|
|
|
|
|
1106
|
|
|
self.all_values = set() |
|
1107
|
|
|
self.all_rules = set() |
|
1108
|
|
|
self.all_groups = set() |
|
1109
|
|
|
|
|
1110
|
|
|
self.profiles_dir = profiles_dir |
|
1111
|
|
|
self.bash_remediation_fns = bash_remediation_fns |
|
1112
|
|
|
self.env_yaml = env_yaml |
|
1113
|
|
|
self.product = env_yaml["product"] |
|
1114
|
|
|
|
|
1115
|
|
|
self.parent_group = None |
|
1116
|
|
|
|
|
1117
|
2 |
|
def _collect_items_to_load(self, guide_directory): |
|
1118
|
|
|
for dir_item in os.listdir(guide_directory): |
|
1119
|
|
|
dir_item_path = os.path.join(guide_directory, dir_item) |
|
1120
|
|
|
_, extension = os.path.splitext(dir_item) |
|
1121
|
|
|
|
|
1122
|
|
|
if extension == '.var': |
|
1123
|
|
|
self.value_files.append(dir_item_path) |
|
1124
|
|
|
elif dir_item == "benchmark.yml": |
|
1125
|
|
|
if self.benchmark_file: |
|
1126
|
|
|
raise ValueError("Multiple benchmarks in one directory") |
|
1127
|
|
|
self.benchmark_file = dir_item_path |
|
1128
|
|
|
elif dir_item == "group.yml": |
|
1129
|
|
|
if self.group_file: |
|
1130
|
|
|
raise ValueError("Multiple groups in one directory") |
|
1131
|
|
|
self.group_file = dir_item_path |
|
1132
|
|
|
elif extension == '.rule': |
|
1133
|
|
|
self.rule_files.append(dir_item_path) |
|
1134
|
|
|
elif is_rule_dir(dir_item_path): |
|
1135
|
|
|
self.rule_files.append(get_rule_dir_yaml(dir_item_path)) |
|
1136
|
|
|
elif dir_item != "tests": |
|
1137
|
|
|
if os.path.isdir(dir_item_path): |
|
1138
|
|
|
self.subdirectories.append(dir_item_path) |
|
1139
|
|
|
else: |
|
1140
|
|
|
sys.stderr.write( |
|
1141
|
|
|
"Encountered file '%s' while recursing, extension '%s' " |
|
1142
|
|
|
"is unknown. Skipping..\n" |
|
1143
|
|
|
% (dir_item, extension) |
|
1144
|
|
|
) |
|
1145
|
|
|
|
|
1146
|
2 |
|
def load_benchmark_or_group(self, guide_directory): |
|
1147
|
|
|
""" |
|
1148
|
|
|
Loads a given benchmark or group from the specified benchmark_file or |
|
1149
|
|
|
group_file, in the context of guide_directory, action, profiles_dir, |
|
1150
|
|
|
env_yaml, and bash_remediation_fns. |
|
1151
|
|
|
|
|
1152
|
|
|
Returns the loaded group or benchmark. |
|
1153
|
|
|
""" |
|
1154
|
|
|
group = None |
|
1155
|
|
|
if self.group_file and self.benchmark_file: |
|
1156
|
|
|
raise ValueError("A .benchmark file and a .group file were found in " |
|
1157
|
|
|
"the same directory '%s'" % (guide_directory)) |
|
1158
|
|
|
|
|
1159
|
|
|
# we treat benchmark as a special form of group in the following code |
|
1160
|
|
|
if self.benchmark_file: |
|
1161
|
|
|
group = Benchmark.from_yaml( |
|
1162
|
|
|
self.benchmark_file, 'product-name', self.env_yaml |
|
1163
|
|
|
) |
|
1164
|
|
|
if self.profiles_dir: |
|
1165
|
|
|
group.add_profiles_from_dir(self.action, self.profiles_dir, self.env_yaml) |
|
1166
|
|
|
group.add_bash_remediation_fns_from_file(self.action, self.bash_remediation_fns) |
|
1167
|
|
|
|
|
1168
|
|
|
if self.group_file: |
|
1169
|
|
|
group = Group.from_yaml(self.group_file, self.env_yaml) |
|
1170
|
|
|
self.all_groups.add(group.id_) |
|
1171
|
|
|
|
|
1172
|
|
|
return group |
|
1173
|
|
|
|
|
1174
|
2 |
|
def _load_group_process_and_recurse(self, guide_directory): |
|
1175
|
|
|
self.loaded_group = self.load_benchmark_or_group(guide_directory) |
|
1176
|
|
|
|
|
1177
|
|
|
if self.loaded_group: |
|
1178
|
|
|
if self.parent_group: |
|
1179
|
|
|
self.parent_group.add_group(self.loaded_group) |
|
1180
|
|
|
|
|
1181
|
|
|
self._process_values() |
|
1182
|
|
|
self._recurse_into_subdirs() |
|
1183
|
|
|
self._process_rules() |
|
1184
|
|
|
|
|
1185
|
2 |
|
def process_directory_tree(self, start_dir, extra_group_dirs=None): |
|
1186
|
|
|
self._collect_items_to_load(start_dir) |
|
1187
|
|
|
if extra_group_dirs is not None: |
|
1188
|
|
|
self.subdirectories += extra_group_dirs |
|
1189
|
|
|
self._load_group_process_and_recurse(start_dir) |
|
1190
|
|
|
|
|
1191
|
2 |
|
def _recurse_into_subdirs(self): |
|
1192
|
|
|
for subdir in self.subdirectories: |
|
1193
|
|
|
loader = self._get_new_loader() |
|
1194
|
|
|
loader.parent_group = self.loaded_group |
|
1195
|
|
|
loader.process_directory_tree(subdir) |
|
1196
|
|
|
self.all_values.update(loader.all_values) |
|
1197
|
|
|
self.all_rules.update(loader.all_rules) |
|
1198
|
|
|
self.all_groups.update(loader.all_groups) |
|
1199
|
|
|
|
|
1200
|
2 |
|
def _get_new_loader(self): |
|
1201
|
|
|
raise NotImplementedError() |
|
1202
|
|
|
|
|
1203
|
2 |
|
def _process_values(self): |
|
1204
|
|
|
raise NotImplementedError() |
|
1205
|
|
|
|
|
1206
|
2 |
|
def _process_rules(self): |
|
1207
|
|
|
raise NotImplementedError() |
|
1208
|
|
|
|
|
1209
|
|
|
|
|
1210
|
2 |
|
class BuildLoader(DirectoryLoader): |
|
1211
|
2 |
|
def __init__(self, profiles_dir, bash_remediation_fns, env_yaml, resolved_rules_dir=None): |
|
1212
|
|
|
super(BuildLoader, self).__init__(profiles_dir, bash_remediation_fns, env_yaml) |
|
1213
|
|
|
|
|
1214
|
|
|
self.action = "build" |
|
1215
|
|
|
|
|
1216
|
|
|
self.resolved_rules_dir = resolved_rules_dir |
|
1217
|
|
|
if resolved_rules_dir and not os.path.isdir(resolved_rules_dir): |
|
1218
|
|
|
os.mkdir(resolved_rules_dir) |
|
1219
|
|
|
|
|
1220
|
2 |
|
def _process_values(self): |
|
1221
|
|
|
for value_yaml in self.value_files: |
|
1222
|
|
|
value = Value.from_yaml(value_yaml, self.env_yaml) |
|
1223
|
|
|
self.all_values.add(value) |
|
1224
|
|
|
self.loaded_group.add_value(value) |
|
1225
|
|
|
|
|
1226
|
2 |
|
def _process_rules(self): |
|
1227
|
|
|
for rule_yaml in self.rule_files: |
|
1228
|
|
|
try: |
|
1229
|
|
|
rule = Rule.from_yaml(rule_yaml, self.env_yaml) |
|
1230
|
|
|
except DocumentationNotComplete: |
|
1231
|
|
|
# Happens on non-debug build when a rule is "documentation-incomplete" |
|
1232
|
|
|
continue |
|
1233
|
|
|
prodtypes = parse_prodtype(rule.prodtype) |
|
1234
|
|
|
if "all" not in prodtypes and self.product not in prodtypes: |
|
1235
|
|
|
continue |
|
1236
|
|
|
self.all_rules.add(rule) |
|
1237
|
|
|
self.loaded_group.add_rule(rule) |
|
1238
|
|
|
if self.resolved_rules_dir: |
|
1239
|
|
|
output_for_rule = os.path.join( |
|
1240
|
|
|
self.resolved_rules_dir, "{id_}.yml".format(id_=rule.id_)) |
|
1241
|
|
|
mkdir_p(self.resolved_rules_dir) |
|
1242
|
|
|
with open(output_for_rule, "w") as f: |
|
1243
|
|
|
rule.normalize(self.env_yaml["product"]) |
|
1244
|
|
|
yaml.dump(rule.to_contents_dict(), f) |
|
1245
|
|
|
|
|
1246
|
2 |
|
def _get_new_loader(self): |
|
1247
|
|
|
return BuildLoader( |
|
1248
|
|
|
self.profiles_dir, self.bash_remediation_fns, self.env_yaml, self.resolved_rules_dir) |
|
1249
|
|
|
|
|
1250
|
2 |
|
def export_group_to_file(self, filename): |
|
1251
|
|
|
return self.loaded_group.to_file(filename) |
|
1252
|
|
|
|
|
1253
|
|
|
|
|
1254
|
2 |
|
class ListInputsLoader(DirectoryLoader): |
|
1255
|
2 |
|
def __init__(self, profiles_dir, bash_remediation_fns, env_yaml): |
|
1256
|
|
|
super(ListInputsLoader, self).__init__(profiles_dir, bash_remediation_fns, env_yaml) |
|
1257
|
|
|
|
|
1258
|
|
|
self.action = "list-inputs" |
|
1259
|
|
|
|
|
1260
|
2 |
|
def _process_values(self): |
|
1261
|
|
|
for value_yaml in self.value_files: |
|
1262
|
|
|
print(value_yaml) |
|
1263
|
|
|
|
|
1264
|
2 |
|
def _process_rules(self): |
|
1265
|
|
|
for rule_yaml in self.rule_files: |
|
1266
|
|
|
print(rule_yaml) |
|
1267
|
|
|
|
|
1268
|
2 |
|
def _get_new_loader(self): |
|
1269
|
|
|
return ListInputsLoader( |
|
1270
|
|
|
self.profiles_dir, self.bash_remediation_fns, self.env_yaml) |
|
1271
|
|
|
|
|
1272
|
2 |
|
def load_benchmark_or_group(self, guide_directory): |
|
1273
|
|
|
result = super(ListInputsLoader, self).load_benchmark_or_group(guide_directory) |
|
1274
|
|
|
|
|
1275
|
|
|
if self.benchmark_file: |
|
1276
|
|
|
print(self.benchmark_file) |
|
1277
|
|
|
|
|
1278
|
|
|
if self.group_file: |
|
1279
|
|
|
print(self.group_file) |
|
1280
|
|
|
|
|
1281
|
|
|
return result |
|
1282
|
|
|
|
ComplianceAsCode /
content
