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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
from pyasn1.codec.der.decoder import decode as der_decode
from pyasn1.codec.der.encoder import encode as der_encode
from pyasn1_modules import pem
from pyasn1_modules import rfc5280
from pyasn1_modules import rfc5990
try:
import unittest2 as unittest
except ImportError:
import unittest
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_decode(substrate, asn1Spec=self.asn1Spec)
assert not rest
assert asn1Object.prettyPrint()
assert der_encode(asn1Object) == substrate
assert asn1Object['algorithm'] == rfc5990.id_rsa_kem
rsa_kem_p, rest = der_decode(asn1Object['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_rsa_kem])
assert not rest
assert rsa_kem_p.prettyPrint()
assert der_encode(rsa_kem_p) == asn1Object['parameters']
assert rsa_kem_p['kem']['algorithm'] == rfc5990.id_kem_rsa
kem_rsa_p, rest = der_decode(rsa_kem_p['kem']['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_kem_rsa])
assert not rest
assert kem_rsa_p.prettyPrint()
assert der_encode(kem_rsa_p) == rsa_kem_p['kem']['parameters']
assert kem_rsa_p['keyLength'] == 16
assert kem_rsa_p['keyDerivationFunction']['algorithm'] == rfc5990.id_kdf_kdf3
kdf_p, rest = der_decode(kem_rsa_p['keyDerivationFunction']['parameters'],
asn1Spec=rfc5280.algorithmIdentifierMap[rfc5990.id_kdf_kdf3])
assert not rest
assert kdf_p.prettyPrint()
assert der_encode(kdf_p) == kem_rsa_p['keyDerivationFunction']['parameters']
def testOpenTypes(self):
substrate = pem.readBase64fromText(self.pem_text)
asn1Object, rest = der_decode(substrate,
asn1Spec=self.asn1Spec,
decodeOpenTypes=True)
assert not rest
assert asn1Object.prettyPrint()
assert der_encode(asn1Object) == substrate
assert asn1Object['algorithm'] == rfc5990.id_rsa_kem
assert asn1Object['parameters']['kem']['algorithm'] == rfc5990.id_kem_rsa
assert asn1Object['parameters']['kem']['parameters']['keyLength'] == 16
suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
if __name__ == '__main__':
import sys
result = unittest.TextTestRunner(verbosity=2).run(suite)
sys.exit(not result.wasSuccessful())
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