#
# 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.type import char
from pyasn1.type import namedtype
from pyasn1.type import univ

from pyasn1_modules import pem
from pyasn1_modules import rfc5652
from pyasn1_modules import rfc6402


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

    def testDerCodec(self):
        layers = { }
        layers.update(rfc5652.cmsContentTypesMap)

        getNextLayer = {
            rfc5652.id_ct_contentInfo: lambda x: x['contentType'],
            rfc5652.id_signedData: lambda x: x['encapContentInfo']['eContentType'],
            rfc6402.id_cct_PKIData: lambda x: None
        }

        getNextSubstrate = {
            rfc5652.id_ct_contentInfo: lambda x: x['content'],
            rfc5652.id_signedData: lambda x: x['encapContentInfo']['eContent'],
            rfc6402.id_cct_PKIData: lambda x: None
        }

        substrate = pem.readBase64fromText(self.pem_text)

        next_layer = rfc5652.id_ct_contentInfo
        while next_layer:
            asn1Object, rest = der_decoder(substrate, asn1Spec=layers[next_layer])
            self.assertFalse(rest)
            self.assertTrue(asn1Object.prettyPrint())
            self.assertEqual(substrate, der_encoder(asn1Object))

            substrate = getNextSubstrate[next_layer](asn1Object)
            next_layer = getNextLayer[next_layer](asn1Object)


    def testOpenTypes(self):
        class ClientInformation(univ.Sequence):
            pass

        ClientInformation.componentType = namedtype.NamedTypes(
            namedtype.NamedType('clientId', univ.Integer()),
            namedtype.NamedType('MachineName', char.UTF8String()),
            namedtype.NamedType('UserName', char.UTF8String()),
            namedtype.NamedType('ProcessName', char.UTF8String())
        )

        class EnrollmentCSP(univ.Sequence):
            pass

        EnrollmentCSP.componentType = namedtype.NamedTypes(
            namedtype.NamedType('KeySpec', univ.Integer()),
            namedtype.NamedType('Name', char.BMPString()),
            namedtype.NamedType('Signature', univ.BitString())
        )

        openTypeMap = {
            # attributes
            univ.ObjectIdentifier('1.3.6.1.4.1.311.13.2.3'): char.IA5String(),
            univ.ObjectIdentifier('1.3.6.1.4.1.311.13.2.2'): EnrollmentCSP(),
            univ.ObjectIdentifier('1.3.6.1.4.1.311.21.20'): ClientInformation(),
            # algorithm identifier parameters
            univ.ObjectIdentifier('1.2.840.113549.1.1.1'): univ.Null(""),
            univ.ObjectIdentifier('1.2.840.113549.1.1.5'): univ.Null(""),
            univ.ObjectIdentifier('1.2.840.113549.1.1.11'): univ.Null(""),
        }

        openTypeMap.update(rfc5652.cmsAttributesMap)
        openTypeMap.update(rfc6402.cmcControlAttributesMap)

        substrate = pem.readBase64fromText(self.pem_text)
        asn1Object, rest = der_decoder(
            substrate, asn1Spec=rfc5652.ContentInfo(), decodeOpenTypes=True)

        self.assertFalse(rest)
        self.assertTrue(asn1Object.prettyPrint())
        self.assertEqual(substrate, der_encoder(asn1Object))

        eci = asn1Object['content']['encapContentInfo']

        self.assertEqual(rfc6402.id_cct_PKIData, eci['eContentType'])

        substrate = eci['eContent']
        asn1Object, rest = der_decoder(
            substrate, asn1Spec=rfc6402.PKIData(), openTypes=openTypeMap,
            decodeOpenTypes=True)

        self.assertFalse(rest)
        self.assertTrue(asn1Object.prettyPrint())
        self.assertEqual(substrate, der_encoder(asn1Object))

        for req in asn1Object['reqSequence']:
            cr = req['tcr']['certificationRequest']

            sig_alg = cr['signatureAlgorithm']

            self.assertIn(sig_alg['algorithm'], openTypeMap)
            self.assertEqual(univ.Null(""), sig_alg['parameters'])

            cri = cr['certificationRequestInfo']
            spki_alg = cri['subjectPublicKeyInfo']['algorithm']

            self.assertIn(spki_alg['algorithm'], openTypeMap)
            self.assertEqual(univ.Null(""), spki_alg['parameters'])

            attrs = cr['certificationRequestInfo']['attributes']
            for attr in attrs:
                self.assertIn( attr['attrType'], openTypeMap)

                if attr['attrType'] == univ.ObjectIdentifier('1.3.6.1.4.1.311.13.2.3'):
                    self.assertEqual("6.2.9200.2", attr['attrValues'][0])

                else:
                    self.assertTrue(attr['attrValues'][0].hasValue())


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

if __name__ == '__main__':
    unittest.TextTestRunner(verbosity=2).run(suite)
