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from ssg._xml import ElementTree |
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from ssg._constants import oval_namespace as oval_ns |
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from ssg._constants import ocil_namespace as ocil_ns |
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ovaltag_to_abbrev = { |
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'definition': 'def', |
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'criteria': 'crit', |
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'test': 'tst', |
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'object': 'obj', |
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'state': 'ste', |
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'variable': 'var', |
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} |
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ociltag_to_abbrev = { |
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'questionnaire': 'questionnaire', |
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'action': 'testaction', |
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'question': 'question', |
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'artifact': 'artifact', |
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'variable': 'variable', |
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} |
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ovalrefattr_to_tag = { |
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"definition_ref": "definition", |
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"test_ref": "test", |
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"object_ref": "object", |
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"state_ref": "state", |
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"var_ref": "variable", |
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} |
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ocilrefattr_to_tag = { |
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"question_ref": "question", |
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} |
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ocilrefchild_to_tag = { |
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"test_action_ref": "action", |
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} |
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def _split_namespace(tag): |
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"""returns a tuple of (namespace,name) removing any fragment id |
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from namespace""" |
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if tag[0] == "{": |
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namespace, name = tag[1:].split("}", 1) |
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return namespace.split("#")[0], name |
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else: |
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return (None, tag) |
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def _namespace_to_prefix(tag): |
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namespace, _ = _split_namespace(tag) |
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if namespace == ocil_ns: |
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return "ocil" |
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if namespace == oval_ns: |
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return "oval" |
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raise RuntimeError( |
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"Error: unknown checksystem referenced in tag : %s" % tag |
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) |
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def _tagname_to_abbrev(tag): |
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namespace, tag = _split_namespace(tag) |
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if tag == "extend_definition": |
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return tag |
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# grab the last part of the tag name to determine its type |
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tag = tag.rsplit("_", 1)[-1] |
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if namespace == ocil_ns: |
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return ociltag_to_abbrev[tag] |
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if namespace == oval_ns: |
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return ovaltag_to_abbrev[tag] |
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raise RuntimeError( |
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"Error: unknown checksystem referenced in tag : %s" % tag |
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) |
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class IDTranslator(object): |
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"""This class is designed to handle the mapping of meaningful, human-readable |
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names to IDs in the formats required by the SCAP checking systems, such as |
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OVAL and OCIL.""" |
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def __init__(self, content_id): |
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self.content_id = content_id |
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def generate_id(self, tagname, name): |
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return "%s:%s-%s:%s:1" % ( |
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_namespace_to_prefix(tagname), |
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self.content_id, name, |
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_tagname_to_abbrev(tagname) |
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) |
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def translate(self, tree, store_defname=False): |
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for element in tree.getiterator(): |
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idname = element.get("id") |
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if idname: |
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# store the old name if requested (for OVAL definitions) |
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if store_defname and \ |
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element.tag == "{%s}definition" % oval_ns: |
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metadata = element.find("{%s}metadata" % oval_ns) |
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if metadata is None: |
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metadata = ElementTree.SubElement(element, "metadata") |
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defnam = ElementTree.Element( |
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"reference", ref_id=idname, source=self.content_id) |
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metadata.append(defnam) |
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# set the element to the new identifier |
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element.set("id", self.generate_id(element.tag, idname)) |
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# continue |
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if element.tag == "{%s}filter" % oval_ns: |
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element.text = self.generate_id("{%s}state" % oval_ns, |
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element.text) |
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continue |
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if element.tag == "{%s#independent}var_ref" % oval_ns: |
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element.text = self.generate_id("{%s}variable" % oval_ns, |
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element.text) |
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continue |
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for attr in element.keys(): |
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if attr in ovalrefattr_to_tag.keys(): |
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element.set(attr, self.generate_id( |
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"{%s}%s" % (oval_ns, ovalrefattr_to_tag[attr]), |
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element.get(attr))) |
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if attr in ocilrefattr_to_tag.keys(): |
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element.set(attr, self.generate_id( |
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"{%s}%s" % (ocil_ns, ocilrefattr_to_tag[attr]), |
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element.get(attr))) |
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if element.tag == "{%s}test_action_ref" % ocil_ns: |
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element.text = self.generate_id("{%s}action" % ocil_ns, |
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element.text) |
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return tree |
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ComplianceAsCode /
content
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The coding style of this project requires that you add a docstring to this code element. Below, you find an example for methods:
If you would like to know more about docstrings, we recommend to read PEP-257: Docstring Conventions.