1#
2# This file is part of pyasn1-modules software.
3#
4# Created by Russ Housley
5# Copyright (c) 2019, Vigil Security, LLC
6# License: http://snmplabs.com/pyasn1/license.html
7#
8
9import sys
10
11from pyasn1.codec.der.decoder import decode as der_decode
12from pyasn1.codec.der.encoder import encode as der_encode
13
14from pyasn1_modules import pem
15from pyasn1_modules import rfc3114
16from pyasn1_modules import rfc5035
17from pyasn1_modules import rfc5083
18from pyasn1_modules import rfc5084
19from pyasn1_modules import rfc5280
20from pyasn1_modules import rfc5652
21from pyasn1_modules import rfc5755
22
23try:
24    import unittest2 as unittest
25except ImportError:
26    import unittest
27
28
29class SecurityLabelTestCase(unittest.TestCase):
30    pem_text = """\
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133"""
134
135    def testDerCodec(self):
136        layers = { }
137        layers.update(rfc5652.cmsContentTypesMap)
138
139        getNextLayer = {
140            rfc5652.id_ct_contentInfo: lambda x: x['contentType'],
141            rfc5652.id_signedData: lambda x: x['encapContentInfo']['eContentType'],
142            rfc5083.id_ct_authEnvelopedData: lambda x: None
143        }
144
145        getNextSubstrate = {
146            rfc5652.id_ct_contentInfo: lambda x: x['content'],
147            rfc5652.id_signedData: lambda x: x['encapContentInfo']['eContent'],
148            rfc5083.id_ct_authEnvelopedData: lambda x: None
149        }
150
151        substrate = pem.readBase64fromText(self.pem_text)
152
153        next_layer = rfc5652.id_ct_contentInfo
154        while next_layer:
155            asn1Object, rest = der_decode(substrate, asn1Spec=layers[next_layer])
156            assert not rest
157            assert asn1Object.prettyPrint()
158            assert der_encode(asn1Object) == substrate
159
160            if next_layer == rfc5652.id_signedData:
161                attrs = asn1Object['signerInfos'][0]['signedAttrs']
162                certs = asn1Object['certificates']
163
164            substrate = getNextSubstrate[next_layer](asn1Object)
165            next_layer = getNextLayer[next_layer](asn1Object)
166
167        spid = rfc3114.id_tsp_TEST_Whirlpool
168        catid = rfc3114.id_tsp_TEST_Whirlpool_Categories
169        conf = rfc3114.Whirlpool_SecurityClassification(value='whirlpool-confidential')
170
171        assert catid in rfc5755.securityCategoryMap.keys()
172        assert rfc5755.id_at_clearance in rfc5280.certificateAttributesMap.keys()
173        assert rfc5280.id_ce_subjectDirectoryAttributes in rfc5280.certificateExtensionsMap.keys()
174
175        security_label_okay = False
176        for attr in attrs:
177            if attr['attrType'] == rfc5035.id_aa_securityLabel:
178                esssl, rest = der_decode(attr['attrValues'][0],
179                    asn1Spec=rfc5035.ESSSecurityLabel())
180                assert not rest
181                assert esssl.prettyPrint()
182                assert der_encode(esssl) == attr['attrValues'][0]
183
184                assert esssl['security-policy-identifier'] == spid
185                assert esssl['security-classification'] == conf
186
187                for cat in esssl['security-categories']:
188                    if cat['type'] == catid:
189                        scv, rest = der_decode(cat['value'],
190                            asn1Spec=rfc3114.SecurityCategoryValues())
191                        assert not rest
192                        assert scv.prettyPrint()
193                        assert der_encode(scv) == cat['value']
194                        for scv_str in scv:
195                            assert 'USE ONLY' in scv_str
196                            security_label_okay = True
197
198        assert security_label_okay
199
200        clearance_okay = False
201        for cert_choice in certs:
202            for extn in cert_choice['certificate']['tbsCertificate']['extensions']:
203                if extn['extnID'] == rfc5280.id_ce_subjectDirectoryAttributes:
204                    ev, rest = der_decode(extn['extnValue'],
205                        asn1Spec=rfc5280.certificateExtensionsMap[extn['extnID']])
206                    assert not rest
207                    assert ev.prettyPrint()
208                    assert der_encode(ev) == extn['extnValue']
209
210                    for attr in ev:
211                        if attr['type'] == rfc5755.id_at_clearance:
212                            av, rest = der_decode(attr['values'][0],
213                                asn1Spec=rfc5280.certificateAttributesMap[attr['type']])
214                            assert av['policyId'] == spid
215                            for cat in av['securityCategories']:
216                                assert cat['type'] == catid
217                                scv, rest = der_decode(cat['value'],
218                                    asn1Spec=rfc5755.securityCategoryMap[cat['type']])
219                                assert not rest
220                                assert scv.prettyPrint()
221                                assert der_encode(scv) == cat['value']
222                                for scv_str in scv:
223                                    assert 'USE ONLY' in scv_str
224                                    clearance_okay = True
225
226        assert clearance_okay
227
228
229suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
230
231if __name__ == '__main__':
232    import sys
233
234    result = unittest.TextTestRunner(verbosity=2).run(suite)
235    sys.exit(not result.wasSuccessful())
236