tests/test_rfc2634.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
import unittest

from pyasn1.codec.der.decoder import decode as der_decoder
from pyasn1.codec.der.encoder import encode as der_encoder

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


class SignedMessageTestCase(unittest.TestCase):
    signed_message_pem_text = """\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"""

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

    def testDerCodec(self):
        substrate = pem.readBase64fromText(self.signed_message_pem_text)
        asn1Object, rest = der_decoder(substrate, asn1Spec=self.asn1Spec)

        self.assertFalse(rest)
        self.assertTrue(asn1Object.prettyPrint())
        self.assertEqual(substrate, der_encoder(asn1Object))
        self.assertEqual(rfc5652.id_signedData,  asn1Object['contentType'])

        sd, rest = der_decoder(
            asn1Object['content'], asn1Spec=rfc5652.SignedData())

        self.assertFalse(rest)
        self.assertTrue(sd.prettyPrint())
        self.assertEqual(asn1Object['content'], der_encoder(sd))
       
        for sa in sd['signerInfos'][0]['signedAttrs']:
            sat = sa['attrType']
            sav0 = sa['attrValues'][0]

            if sat in rfc5652.cmsAttributesMap.keys():
                sav, rest = der_decoder(
                    sav0, asn1Spec=rfc5652.cmsAttributesMap[sat])
                self.assertFalse(rest)
                self.assertTrue(sav.prettyPrint())
                self.assertEqual(sav0, der_encoder(sav))


class SignedReceiptTestCase(unittest.TestCase):
    signed_receipt_pem_text = """\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"""

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

    def testDerCodec(self):
        substrate = pem.readBase64fromText(self.signed_receipt_pem_text)
        asn1Object, rest = der_decoder(substrate, asn1Spec=self.asn1Spec)

        self.assertFalse(rest)
        self.assertTrue(asn1Object.prettyPrint())
        self.assertEqual(substrate, der_encoder(asn1Object))
        self.assertEqual(asn1Object['contentType'], rfc5652.id_signedData)

        sd, rest = der_decoder(asn1Object['content'], asn1Spec=rfc5652.SignedData())

        self.assertFalse(rest)

        self.assertTrue(sd.prettyPrint())
        self.assertEqual(asn1Object['content'], der_encoder(sd))
        self.assertEqual(sd['encapContentInfo']['eContentType'],
                         rfc2634.id_ct_receipt)

        receipt, rest = der_decoder(sd['encapContentInfo']['eContent'],
                                   asn1Spec=rfc2634.Receipt())

        self.assertFalse(rest)
        self.assertTrue(receipt.prettyPrint())
        self.assertEqual(sd['encapContentInfo']['eContent'], der_encoder(receipt))
        self.assertEqual(receipt['version'], rfc2634.ESSVersion().subtype(value='v1'))

        for sa in sd['signerInfos'][0]['signedAttrs']:
            sat = sa['attrType']
            sav0 = sa['attrValues'][0]

            if sat in rfc5652.cmsAttributesMap.keys():
                sav, rest = der_decoder(sav0, asn1Spec=rfc5652.cmsAttributesMap[sat])

                self.assertFalse(rest)
                self.assertTrue(sav.prettyPrint())
                self.assertEqual(sav0, der_encoder(sav))

    def testOpenTypes(self):
        substrate = pem.readBase64fromText(self.signed_receipt_pem_text)
        asn1Object, rest = der_decoder(substrate,
            asn1Spec=self.asn1Spec,
            decodeOpenTypes=True)

        self.assertFalse(rest)
        self.assertTrue(asn1Object.prettyPrint())
        self.assertEqual(substrate, der_encoder(asn1Object))
        self.assertIn(asn1Object['contentType'], rfc5652.cmsContentTypesMap.keys())
        self.assertEqual(asn1Object['contentType'], rfc5652.id_signedData)

        sd = asn1Object['content']

        self.assertEqual(sd['version'], rfc5652.CMSVersion().subtype(value='v3'))
        self.assertIn(sd['encapContentInfo']['eContentType'], rfc5652.cmsContentTypesMap)
        self.assertEqual(sd['encapContentInfo']['eContentType'], rfc2634.id_ct_receipt)

        for sa in sd['signerInfos'][0]['signedAttrs']:

            self.assertIn(sa['attrType'], rfc5652.cmsAttributesMap)

            if sa['attrType'] == rfc2634.id_aa_msgSigDigest:
                sa['attrValues'][0].prettyPrint()[:10] == '0x167378'

        # Since receipt is inside an OCTET STRING, decodeOpenTypes=True cannot
        # automatically decode it 
        receipt, rest = der_decoder(sd['encapContentInfo']['eContent'],
            asn1Spec=rfc5652.cmsContentTypesMap[sd['encapContentInfo']['eContentType']])

        self.assertEqual(receipt['version'], rfc2634.ESSVersion().subtype(value='v1'))


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

if __name__ == '__main__':
    result = unittest.TextTestRunner(verbosity=2).run(suite)
    sys.exit(not result.wasSuccessful())