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''' |
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This file contains a class for creating OVAL graph from ARF XML source |
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''' |
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import os |
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import sys |
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from lxml import etree as ET |
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from .._builder_oval_tree import _BuilderOvalTree |
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from ..exceptions import NotChecked |
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from ._xml_parser_oval_scan_definitions import _XmlParserScanDefinitions |
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ns = { |
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'XMLSchema': 'http://oval.mitre.org/XMLSchema/oval-results-5', |
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'xccdf': 'http://checklists.nist.gov/xccdf/1.2', |
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'arf': 'http://scap.nist.gov/schema/asset-reporting-format/1.1', |
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'oval-definitions': 'http://oval.mitre.org/XMLSchema/oval-definitions-5', |
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'scap': 'http://scap.nist.gov/schema/scap/source/1.2', |
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'oval-characteristics': 'http://oval.mitre.org/XMLSchema/oval-system-characteristics-5', |
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} |
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class XmlParser: |
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def __init__(self, src): |
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self.src = src |
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self.tree = ET.parse(self.src) |
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self.root = self.tree.getroot() |
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self.arf_schemas_src = '../schemas/arf/1.1/asset-reporting-format_1.1.0.xsd' |
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if not self.validate(self.arf_schemas_src): |
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CRED = '\033[91m' |
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CEND = '\033[0m' |
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message = CRED + "Warning: This file is not valid arf report." + CEND |
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print(message, file=sys.stderr) |
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try: |
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self.used_rules = self._get_used_rules() # ! |
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self.report_data_href = list(self.used_rules.values())[0]['href'] |
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self.report_data = self._get_report_data(self.report_data_href) |
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self.notselected_rules = self._get_notselected_rules() # put together ! |
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self.definitions = self._get_definitions() |
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self.oval_definitions = self._get_oval_definitions() |
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self.scan_definitions = _XmlParserScanDefinitions( |
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self.definitions, self.oval_definitions, self.report_data).get_scan() |
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except BaseException as error: |
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raise ValueError( |
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'This file "{}" is not arf report file or there are no results'.format( |
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self.src)) from error |
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def get_src(self, src): |
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_dir = os.path.dirname(os.path.realpath(__file__)) |
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FIXTURE_DIR = os.path.join(_dir, src) |
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return str(FIXTURE_DIR) |
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def validate(self, xsd_path): |
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xsd_path = self.get_src(xsd_path) |
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xmlschema_doc = ET.parse(xsd_path) |
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xmlschema = ET.XMLSchema(xmlschema_doc) |
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xml_doc = self.tree |
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result = xmlschema.validate(xml_doc) |
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return result |
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def _get_used_rules(self): |
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rules_results = self.root.findall( |
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'.//xccdf:TestResult/xccdf:rule-result', ns) |
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rules = {} |
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for rule_result in rules_results: |
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result = rule_result.find('.//xccdf:result', ns) |
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if result.text != "notselected": |
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check_content_ref = rule_result.find( |
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'.//xccdf:check/xccdf:check-content-ref', ns) |
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message = rule_result.find( |
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'.//xccdf:message', ns) |
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rule_dict = {} |
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if check_content_ref is not None: |
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rule_dict['id_def'] = check_content_ref.attrib.get('name') |
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rule_dict['href'] = check_content_ref.attrib.get('href') |
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rule_dict['result'] = result.text |
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if message is not None: |
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rule_dict['message'] = message.text |
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rules[rule_result.get('idref')] = rule_dict |
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return rules |
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def _get_report_data(self, href): |
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report_data = None |
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reports = self.root.find('.//arf:reports', ns) |
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for report in reports: |
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if "#" + str(report.get("id")) == href: |
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report_data = report |
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return report_data |
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def _get_notselected_rules(self): |
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rules_results = self.root.findall( |
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'.//xccdf:TestResult/xccdf:rule-result', ns) |
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rules = [] |
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for rule_result in rules_results: |
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result = rule_result.find('.//xccdf:result', ns) |
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if result.text == "notselected": |
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rules.append(rule_result.get('idref')) |
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return rules |
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def _get_definitions(self): |
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data = self.report_data.find( |
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('.//XMLSchema:oval_results/XMLSchema:results/' |
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'XMLSchema:system/XMLSchema:definitions'), ns) |
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return data |
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def _get_oval_definitions(self): |
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return self.root.find( |
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'.//arf:report-requests/arf:report-request/' |
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'arf:content/scap:data-stream-collection/' |
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'scap:component/oval-definitions:oval_definitions/' |
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'oval-definitions:definitions', ns) |
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def _get_definition_of_rule(self, rule_id): |
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if rule_id in self.used_rules: |
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rule_info = self.used_rules[rule_id] |
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if rule_info['id_def'] is None: |
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raise NotChecked( |
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'"{}" is {}: {}'.format( |
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rule_id, |
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rule_info['result'], |
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rule_info['message'])) |
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return dict(rule_id=rule_id, |
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definition_id=rule_info['id_def'], |
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definition=self.scan_definitions[rule_info['id_def']]) |
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elif rule_id in self.notselected_rules: |
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raise ValueError( |
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'Rule "{}" was not selected, so there are no results.' |
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.format(rule_id)) |
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else: |
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raise ValueError('404 rule "{}" not found!'.format(rule_id)) |
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def get_oval_tree(self, rule_id): |
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return _BuilderOvalTree.get_oval_tree_from_dict_of_rule( |
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self._get_definition_of_rule(rule_id)) |
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OpenSCAP /
oval-graph
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