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#
# 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 rfc5280
from pyasn1_modules import rfc5990
class RSAKEMTestCase(unittest.TestCase):
pem_text = """\
MEcGCyqGSIb3DQEJEAMOMDgwKQYHKIGMcQICBDAeMBkGCiuBBRCGSAksAQIwCwYJ
YIZIAWUDBAIBAgEQMAsGCWCGSAFlAwQBBQ==
"""
def setUp(self):
self.asn1Spec = rfc5280.AlgorithmIdentifier()
def testDerCodec(self):
substrate = pem.readBase64fromText(self.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(rfc5990.id_rsa_kem, asn1Object['algorithm'])
rsa_kem_p, rest = der_decoder(
asn1Object['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_rsa_kem])
self.assertFalse(rest)
self.assertTrue(rsa_kem_p.prettyPrint())
self.assertEqual(asn1Object['parameters'], der_encoder(rsa_kem_p))
self.assertEqual(rfc5990.id_kem_rsa, rsa_kem_p['kem']['algorithm'])
kem_rsa_p, rest = der_decoder(
rsa_kem_p['kem']['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_kem_rsa])
self.assertFalse(rest)
self.assertTrue(kem_rsa_p.prettyPrint())
self.assertEqual(
rsa_kem_p['kem']['parameters'], der_encoder(kem_rsa_p))
self.assertEqual(16, kem_rsa_p['keyLength'])
self.assertEqual(
rfc5990.id_kdf_kdf3, kem_rsa_p['keyDerivationFunction']['algorithm'])
kdf_p, rest = der_decoder(
kem_rsa_p['keyDerivationFunction']['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_kdf_kdf3])
self.assertFalse(rest)
self.assertTrue(kdf_p.prettyPrint())
self.assertEqual(
kem_rsa_p['keyDerivationFunction']['parameters'],
der_encoder(kdf_p))
def testOpenTypes(self):
substrate = pem.readBase64fromText(self.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.assertEqual(rfc5990.id_rsa_kem, asn1Object['algorithm'])
self.assertEqual(
rfc5990.id_kem_rsa, asn1Object['parameters']['kem']['algorithm'])
self.assertEqual(
16, asn1Object['parameters']['kem']['parameters']['keyLength'])
suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
if __name__ == '__main__':
result = unittest.TextTestRunner(verbosity=2).run(suite)
sys.exit(not result.wasSuccessful())
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