create-stig-overlay.ssg_xccdf_stigid_mapping() - Code Metrics - Inspection of "Merge pull request #6005 from yuumasato/test_updat..." - ComplianceAsCode/content - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( ea7c4a...d61422 )

by Matěj

created 2020-08-17 11:55 UTC

create-stig-overlay.ssg_xccdf_stigid_mapping() B

↳ Parent: create-stig-overlay

Complexity

Conditions

Size

Total Lines	19
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	42

Importance

Changes

Metric	Value
cc	6
eloc	15
nop	1
dl	0
loc	19
ccs	0
cts	15
cp	0
crap	42
rs	8.6666
c	0
b	0
f	0

#!/usr/bin/env python2

from __future__ import print_function

import re
import sys
import argparse
import os
import ssg
import ssg.xml

ET = ssg.xml.ElementTree


owner = "disastig"
stig_ns = ["https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=operating-systems%2Cunix-linux",
           "https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=operating-systems%2Cgeneral-purpose-os",
           "https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=app-security%2Capplication-servers"]
xccdf_ns = "http://checklists.nist.gov/xccdf/1.1"
dc_ns = "http://purl.org/dc/elements/1.1/"
outfile = "stig_overlay.xml"


def yes_no_prompt():
    prompt = "Would you like to proceed? (Y/N): "

    while True:
        data = str(raw_input(prompt)).lower()


        if data in ("yes", "y"):
            return True
        elif data in ("n", "no"):
            return False


def element_value(element, element_obj):
    for elem in element_obj.findall("./{%s}%s" % (xccdf_ns, element)):
        elem = elem.text
    try:
        return elem

    except UnboundLocalError as e:
        return ""


def ssg_xccdf_stigid_mapping(ssgtree):
    xccdftostig_idmapping = {}

    for rule in ssgtree.findall(".//{%s}Rule" % xccdf_ns):
        srgs = []
        rhid = ""

        xccdfid = rule.get("id")
        if xccdfid is not None:
            for references in stig_ns:
                stig = [ids for ids in rule.findall(".//{%s}reference[@href='%s']" % (xccdf_ns, references))]
                for ref in reversed(stig):
                    if not ref.text.startswith("SRG-"):
                        rhid = ref.text
                    else:
                        srgs.append(ref.text)
            xccdftostig_idmapping.update({rhid: {xccdfid: srgs}})

    return xccdftostig_idmapping


def get_nested_stig_items(ssg_mapping, srg):
    mapped_id = "XXXX"
    for rhid, srgs in ssg_mapping.iteritems():
        for xccdfid, srglist in srgs.iteritems():
            if srg in srglist and len(srglist) > 1:
                mapped_id = xccdfid
                break

    return mapped_id


def getkey(elem):
    return elem.get("ownerid")


def new_stig_overlay(xccdftree, ssgtree, outfile):
    if not ssgtree:
        ssg_mapping = False
    else:
        ssg_mapping = ssg_xccdf_stigid_mapping(ssgtree)

    new_stig_overlay = ET.Element("overlays", xmlns=xccdf_ns)
    for group in xccdftree.findall("./{%s}Group" % xccdf_ns):
        vkey = group.get("id").strip('V-')
        for title in group.findall("./{%s}title" % xccdf_ns):
            srg = title.text
        for rule in group.findall("./{%s}Rule" % xccdf_ns):
            svkey_raw = rule.get("id")
            svkey = svkey_raw.strip()[3:-7]
            severity = rule.get("severity")
            release = svkey_raw.strip()[9:-5]
            version = element_value("version", rule)
            rule_title = element_value("title", rule)
            ident = element_value("ident", rule).strip("CCI-").lstrip("0")

        if not ssgtree:
            mapped_id = "XXXX"
        else:
            try:
                mapped_id = ''.join(ssg_mapping[version].keys())

            except KeyError as e:
                mapped_id = get_nested_stig_items(ssg_mapping, srg)


        overlay = ET.SubElement(new_stig_overlay, "overlay", owner=owner,
                                ruleid=mapped_id, ownerid=version, disa=ident,

                                severity=severity)

        vmsinfo = ET.SubElement(overlay, "VMSinfo", VKey=vkey,
                                SVKey=svkey, VRelease=release)

        title = ET.SubElement(overlay, "title", text=rule_title)


    lines = new_stig_overlay.findall("overlay")
    new_stig_overlay[:] = sorted(lines, key=getkey)
    tree = ET.ElementTree(new_stig_overlay)
    tree.write(outfile, encoding="UTF-8",
               xml_declaration=True)
    print("\nGenerated the new STIG overlay file: %s" % outfile)


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument("--disa-xccdf", default=False, required=True,
                        action="store", dest="disa_xccdf_filename",
                        help="A DISA generated XCCDF Manual checks file. \
                              For example: disa-stig-rhel6-v1r12-xccdf-manual.xml")
    parser.add_argument("--ssg-xccdf", default=None,
                        action="store", dest="ssg_xccdf_filename",
                        help="A SSG generated XCCDF file. \
                              For example: ssg-rhel6-xccdf.xml")
    parser.add_argument("-o", "--output", default=outfile,
                        action="store", dest="output_file",
                        help="STIG overlay XML content file \
                             [default: %default]")
    return parser.parse_args()


def main():
    args = parse_args()

    disa_xccdftree = ET.parse(args.disa_xccdf_filename)

    if not args.ssg_xccdf_filename:
        print("WARNING: You are generating a STIG overlay XML file without mapping it "
              "to existing SSG content.")
        prompt = yes_no_prompt()
        if not prompt:
            sys.exit(0)
        ssg_xccdftree = False
    else:
        ssg_xccdftree = ET.parse(args.ssg_xccdf_filename)
        ssg = ssg_xccdftree.find(".//{%s}publisher" % dc_ns).text
        if ssg != "SCAP Security Guide Project":
            sys.exit("%s is not a valid SSG generated XCCDF file." % args.ssg_xccdf_filename)

    disa = disa_xccdftree.find(".//{%s}source" % dc_ns).text
    if disa != "STIG.DOD.MIL":
        sys.exit("%s is not a valid DISA generated manual XCCDF file." % args.disa_xccdf_filename)

    new_stig_overlay(disa_xccdftree, ssg_xccdftree, args.output_file)


if __name__ == "__main__":
    main()


1			#!/usr/bin/env python2
2
3			from __future__ import print_function
4
5			import re
6			import sys
7			import argparse
8			import os
9			import ssg
10			import ssg.xml
11
12			ET = ssg.xml.ElementTree
13
14
15			owner = "disastig"
16			stig_ns = ["https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=operating-systems%2Cunix-linux",
17			"https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=operating-systems%2Cgeneral-purpose-os",
18			"https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=app-security%2Capplication-servers"]
19			xccdf_ns = "http://checklists.nist.gov/xccdf/1.1"
20			dc_ns = "http://purl.org/dc/elements/1.1/"
21			outfile = "stig_overlay.xml"
22
23
24			def yes_no_prompt():
25			prompt = "Would you like to proceed? (Y/N): "
26
27			while True:
28			data = str(raw_input(prompt)).lower()
			0 ignored issues – show Comprehensibility Best Practice introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `raw_input` does not seem to be defined. Loading history...
29
30			if data in ("yes", "y"):
31			return True
32			elif data in ("n", "no"):
33			return False
34
35
36			def element_value(element, element_obj):
37			for elem in element_obj.findall("./{%s}%s" % (xccdf_ns, element)):
38			elem = elem.text
39			try:
40			return elem
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `elem` does not seem to be defined in case the `for` loop on line `37` is not entered. Are you sure this can never be the case? Loading history...
41			except UnboundLocalError as e:
42			return ""
43
44
45			def ssg_xccdf_stigid_mapping(ssgtree):
46			xccdftostig_idmapping = {}
47
48			for rule in ssgtree.findall(".//{%s}Rule" % xccdf_ns):
49			srgs = []
50			rhid = ""
51
52			xccdfid = rule.get("id")
53			if xccdfid is not None:
54			for references in stig_ns:
55			stig = [ids for ids in rule.findall(".//{%s}reference[@href='%s']" % (xccdf_ns, references))]
56			for ref in reversed(stig):
57			if not ref.text.startswith("SRG-"):
58			rhid = ref.text
59			else:
60			srgs.append(ref.text)
61			xccdftostig_idmapping.update({rhid: {xccdfid: srgs}})
62
63			return xccdftostig_idmapping
64
65
66			def get_nested_stig_items(ssg_mapping, srg):
67			mapped_id = "XXXX"
68			for rhid, srgs in ssg_mapping.iteritems():
69			for xccdfid, srglist in srgs.iteritems():
70			if srg in srglist and len(srglist) > 1:
71			mapped_id = xccdfid
72			break
73
74			return mapped_id
75
76
77			def getkey(elem):
78			return elem.get("ownerid")
79
80
81			def new_stig_overlay(xccdftree, ssgtree, outfile):
82			if not ssgtree:
83			ssg_mapping = False
84			else:
85			ssg_mapping = ssg_xccdf_stigid_mapping(ssgtree)
86
87			new_stig_overlay = ET.Element("overlays", xmlns=xccdf_ns)
88			for group in xccdftree.findall("./{%s}Group" % xccdf_ns):
89			vkey = group.get("id").strip('V-')
90			for title in group.findall("./{%s}title" % xccdf_ns):
91			srg = title.text
92			for rule in group.findall("./{%s}Rule" % xccdf_ns):
93			svkey_raw = rule.get("id")
94			svkey = svkey_raw.strip()[3:-7]
95			severity = rule.get("severity")
96			release = svkey_raw.strip()[9:-5]
97			version = element_value("version", rule)
98			rule_title = element_value("title", rule)
99			ident = element_value("ident", rule).strip("CCI-").lstrip("0")
100
101			if not ssgtree:
102			mapped_id = "XXXX"
103			else:
104			try:
105			mapped_id = ''.join(ssg_mapping[version].keys())
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `version` does not seem to be defined for all execution paths. Loading history...
106			except KeyError as e:
107			mapped_id = get_nested_stig_items(ssg_mapping, srg)
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `srg` does not seem to be defined for all execution paths. Loading history...
108
109			overlay = ET.SubElement(new_stig_overlay, "overlay", owner=owner,
110			ruleid=mapped_id, ownerid=version, disa=ident,
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `ident` does not seem to be defined for all execution paths. Loading history...
111			severity=severity)
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `severity` does not seem to be defined for all execution paths. Loading history...
112			vmsinfo = ET.SubElement(overlay, "VMSinfo", VKey=vkey,
113			SVKey=svkey, VRelease=release)
			0 ignored issues – show introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `svkey` does not seem to be defined for all execution paths. Loading history... introduced 2018-05-31 12:10 UTC by Report Bug Copy Issue Report The variable `release` does not seem to be defined for all execution paths. Loading history...
114			title = ET.SubElement(overlay, "title", text=rule_title)
			0 ignored issues – show introduced 2019-12-16 08:57 UTC by Report Bug Copy Issue Report The variable `rule_title` does not seem to be defined for all execution paths. Loading history...
115
116			lines = new_stig_overlay.findall("overlay")
117			new_stig_overlay[:] = sorted(lines, key=getkey)
118			tree = ET.ElementTree(new_stig_overlay)
119			tree.write(outfile, encoding="UTF-8",
120			xml_declaration=True)
121			print("\nGenerated the new STIG overlay file: %s" % outfile)
122
123
124			def parse_args():
125			parser = argparse.ArgumentParser()
126			parser.add_argument("--disa-xccdf", default=False, required=True,
127			action="store", dest="disa_xccdf_filename",
128			help="A DISA generated XCCDF Manual checks file. \
129			For example: disa-stig-rhel6-v1r12-xccdf-manual.xml")
130			parser.add_argument("--ssg-xccdf", default=None,
131			action="store", dest="ssg_xccdf_filename",
132			help="A SSG generated XCCDF file. \
133			For example: ssg-rhel6-xccdf.xml")
134			parser.add_argument("-o", "--output", default=outfile,
135			action="store", dest="output_file",
136			help="STIG overlay XML content file \
137			[default: %default]")
138			return parser.parse_args()
139
140
141			def main():
142			args = parse_args()
143
144			disa_xccdftree = ET.parse(args.disa_xccdf_filename)
145
146			if not args.ssg_xccdf_filename:
147			print("WARNING: You are generating a STIG overlay XML file without mapping it "
148			"to existing SSG content.")
149			prompt = yes_no_prompt()
150			if not prompt:
151			sys.exit(0)
152			ssg_xccdftree = False
153			else:
154			ssg_xccdftree = ET.parse(args.ssg_xccdf_filename)
155			ssg = ssg_xccdftree.find(".//{%s}publisher" % dc_ns).text
156			if ssg != "SCAP Security Guide Project":
157			sys.exit("%s is not a valid SSG generated XCCDF file." % args.ssg_xccdf_filename)
158
159			disa = disa_xccdftree.find(".//{%s}source" % dc_ns).text
160			if disa != "STIG.DOD.MIL":
161			sys.exit("%s is not a valid DISA generated manual XCCDF file." % args.disa_xccdf_filename)
162
163			new_stig_overlay(disa_xccdftree, ssg_xccdftree, args.output_file)
164
165
166			if __name__ == "__main__":
167			main()
168

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create-stig-overlay.ssg_xccdf_stigid_mapping() B

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