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from __future__ import absolute_import |
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from __future__ import print_function |
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import sys |
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import os |
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from .constants import oval_footer as footer |
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from .constants import oval_namespace as ovalns |
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from .xml import ElementTree as ET |
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from .xml import oval_generated_header |
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from .jinja import process_file_with_macros |
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from .products import _get_implied_properties |
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ASSUMED_OVAL_VERSION_STRING = "5.11" |
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# globals, to make recursion easier in case we encounter extend_definition |
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try: |
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ET.register_namespace("oval", ovalns) |
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except AttributeError: |
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# Legacy Python 2.6 fix, see e.g. |
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# https://www.programcreek.com/python/example/57552/xml.etree.ElementTree._namespace_map |
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from xml.etree import ElementTree as ET |
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ET._namespace_map[ovalns] = "oval" |
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def applicable_platforms(oval_file, oval_version_string=None): |
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""" |
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Returns the applicable platforms for a given oval file |
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""" |
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platforms = [] |
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if not oval_version_string: |
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oval_version_string = ASSUMED_OVAL_VERSION_STRING |
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header = oval_generated_header("applicable_platforms", oval_version_string, "0.0.1") |
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oval_version_list = [int(num) for num in oval_version_string.split(".")] |
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subst_dict = dict(target_oval_version=oval_version_list) |
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oval_filename_components = oval_file.split(os.path.sep) |
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if len(oval_filename_components) > 3: |
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subst_dict["rule_id"] = oval_filename_components[-3] |
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else: |
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msg = "Unable to get rule ID from OVAL path '{path}'".format(path=oval_file) |
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print(msg, file=sys.stderr) |
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subst_dict = _get_implied_properties(subst_dict) |
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subst_dict['target_oval_version'] = [999, 999.999] |
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body = process_file_with_macros(oval_file, subst_dict) |
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try: |
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oval_tree = ET.fromstring(header + body + footer) |
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except Exception as e: |
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msg = "Error while loading " + oval_file |
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print(msg, file=sys.stderr) |
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raise e |
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element_path = "./{%s}def-group/{%s}definition/{%s}metadata/{%s}affected/{%s}platform" |
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element_ns_path = element_path % (ovalns, ovalns, ovalns, ovalns, ovalns) |
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for node in oval_tree.findall(element_ns_path): |
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platforms.append(node.text) |
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return platforms |
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def parse_affected(oval_contents): |
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""" |
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Returns the tuple (start_affected, end_affected, platform_indents) for |
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the passed oval file contents. start_affected is the line number of |
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starting tag of the <affected> element, end_affected is the line number of |
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the closing tag of the </affected> element, and platform_indents is a |
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string containing the indenting characters before the contents of the |
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<affected> element. |
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""" |
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start_affected = list(filter(lambda x: "<affected" in oval_contents[x], |
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range(0, len(oval_contents)))) |
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if len(start_affected) != 1: |
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raise ValueError("OVAL file does not contain a single <affected> " |
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"element; counted %d in:\n%s\n\n" % |
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(len(start_affected), "\n".join(oval_contents))) |
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start_affected = start_affected[0] |
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end_affected = list(filter(lambda x: "</affected" in oval_contents[x], |
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range(0, len(oval_contents)))) |
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if len(end_affected) != 1: |
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raise ValueError("Malformed OVAL file does not contain a single " |
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"closing </affected>; counted %d in:\n%s\n\n" % |
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(len(start_affected), "\n".join(oval_contents))) |
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end_affected = end_affected[0] |
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if start_affected >= end_affected: |
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raise ValueError("Malformed OVAL file: start affected tag begins " |
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"on the same line or after ending affected tag: " |
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"start:%d vs end:%d:\n%s\n\n" % |
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(start_affected, end_affected, oval_contents)) |
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# Validate that start_affected contains only a starting <affected> tag; |
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# otherwise, using this information to update the <platform> subelements |
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# would fail. |
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start_line = oval_contents[start_affected] |
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start_line = start_line.strip() |
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if not start_line.startswith('<affected'): |
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raise ValueError("Malformed OVAL file: line with starting affected " |
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"tag contains other elements: line:%s\n%s\n\n" % |
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(start_line, oval_contents)) |
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if '<' in start_line[1:]: |
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raise ValueError("Malformed OVAL file: line with starting affected " |
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"tag contains other elements: line:%s\n%s\n\n" % |
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(start_line, oval_contents)) |
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# Validate that end_affected contains only an ending </affected> tag; |
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# otherwise, using this information to update the <platform> subelements |
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# would fail. |
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end_line = oval_contents[end_affected] |
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end_line = end_line.strip() |
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if not end_line.startswith('</affected>'): |
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raise ValueError("Malformed OVAL file: line with ending affected " |
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"tag contains other elements: line:%s\n%s\n\n" % |
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(end_line, oval_contents)) |
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if '<' in end_line[1:]: |
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raise ValueError("Malformed OVAL file: line with ending affected " |
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"tag contains other elements: line:%s\n%s\n\n" % |
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(end_line, oval_contents)) |
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indents = "" |
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if start_affected+1 == end_affected: |
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# Since the affected element is present but empty, the indents should |
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# be two more spaces than that of the starting <affected> element. |
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start_index = oval_contents[start_affected].index('<') |
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indents = oval_contents[start_affected][0:start_index] |
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indents += " " |
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else: |
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# Otherwise, grab the indents off the next line unmodified, as this is |
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# likely a platform element tag. We don't validate here that this is |
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# indeed the case, as other parts of the build infrastructure will |
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# validate this for us. |
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start_index = oval_contents[start_affected+1].index('<') |
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indents = oval_contents[start_affected+1][0:start_index] |
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return start_affected, end_affected, indents |
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ComplianceAsCode /
content
