tests/test_rfc4073.py

#
# This file is part of pyasn1-modules software.
#
# Created by Russ Housley
# Copyright (c) 2019, Vigil Security, LLC
# License: http://snmplabs.com/pyasn1/license.html
#

import sys

from pyasn1.codec.der.decoder import decode as der_decode
from pyasn1.codec.der.encoder import encode as der_encode

from pyasn1.compat.octets import str2octs

from pyasn1_modules import pem
from pyasn1_modules import rfc2634
from pyasn1_modules import rfc4073
from pyasn1_modules import rfc5652

try:
    import unittest2 as unittest
except ImportError:
    import unittest


class ContentCollectionTestCase(unittest.TestCase):
    pem_text = """\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"""

    def setUp(self):
        self.asn1Spec = rfc5652.ContentInfo()

    def testDerCodec(self):

        def test_layer(substrate, content_type):
            asn1Object, rest = der_decode(substrate, asn1Spec=layers[content_type])
            assert not rest
            assert asn1Object.prettyPrint()
            assert der_encode(asn1Object) == substrate

            if content_type == rfc4073.id_ct_contentWithAttrs:
                for attr in asn1Object['attrs']:
                    assert attr['attrType'] in rfc5652.cmsAttributesMap.keys()
    
            return asn1Object

        layers = rfc5652.cmsContentTypesMap

        getNextLayer = {
            rfc5652.id_ct_contentInfo: lambda x: x['contentType'],
            rfc4073.id_ct_contentCollection: lambda x: x[0]['contentType'],
            rfc4073.id_ct_contentWithAttrs: lambda x: x['content']['contentType'],
            rfc5652.id_data: lambda x: None,
        }

        getNextSubstrate = {
            rfc5652.id_ct_contentInfo: lambda x: x['content'],
            rfc4073.id_ct_contentCollection: lambda x: x[0]['content'],
            rfc4073.id_ct_contentWithAttrs: lambda x: x['content']['content'],
            rfc5652.id_data: lambda x: None,
        }

        substrate = pem.readBase64fromText(self.pem_text)

        this_layer = rfc5652.id_ct_contentInfo
        while this_layer != rfc5652.id_data:
            if this_layer == rfc4073.id_ct_contentCollection:
                asn1Object = test_layer(substrate, this_layer)
                for ci in asn1Object:
                    substrate = ci['content']
                    this_layer = ci['contentType']
                    while this_layer != rfc5652.id_data:
                        asn1Object = test_layer(substrate, this_layer)
                        substrate = getNextSubstrate[this_layer](asn1Object)
                        this_layer = getNextLayer[this_layer](asn1Object)
            else:
                asn1Object = test_layer(substrate, this_layer)
                substrate = getNextSubstrate[this_layer](asn1Object)
                this_layer = getNextLayer[this_layer](asn1Object)

    def testOpenTypes(self):
        substrate = pem.readBase64fromText(self.pem_text)
        asn1Object, rest = der_decode(substrate,
            asn1Spec=rfc5652.ContentInfo(),
            decodeOpenTypes=True)
        assert not rest
        assert asn1Object.prettyPrint()
        assert der_encode(asn1Object) == substrate

        assert asn1Object['contentType'] == rfc4073.id_ct_contentCollection
        for ci in asn1Object['content']:
            assert ci['contentType'] in rfc5652.cmsContentTypesMap.keys()
            assert ci['contentType'] == rfc4073.id_ct_contentWithAttrs
            next_ci = ci['content']['content']
            assert next_ci['contentType'] in rfc5652.cmsContentTypesMap.keys()
            assert next_ci['contentType'] == rfc5652.id_data
            assert str2octs('Content-Type: text') in next_ci['content']

            for attr in ci['content']['attrs']:
                assert attr['attrType'] in rfc5652.cmsAttributesMap.keys()
                if attr['attrType'] == rfc2634.id_aa_contentHint:
                    assert 'RFC 4073' in attr['attrValues'][0]['contentDescription']


suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])

if __name__ == '__main__':
    import sys

    result = unittest.TextTestRunner(verbosity=2).run(suite)
    sys.exit(not result.wasSuccessful())