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"""
PKCS#11 RSA Public Key Cryptography
"""
import pkcs11
from pkcs11 import MGF, Attribute, KeyType, Mechanism, ObjectClass
from . import FIXME, TOKEN_PIN, TestCase, requires
class RSATests(TestCase):
@requires(Mechanism.RSA_PKCS_KEY_PAIR_GEN)
def setUp(self):
super().setUp()
self.public, self.private = self.session.generate_keypair(KeyType.RSA, 1024)
def test_key_length(self):
self.assertEqual(1024, self.private.key_length)
self.assertEqual(1024, self.public.key_length)
@requires(Mechanism.RSA_PKCS)
def test_sign_pkcs_v15(self):
data = b"00000000"
signature = self.private.sign(data, mechanism=Mechanism.RSA_PKCS)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature, mechanism=Mechanism.RSA_PKCS))
self.assertFalse(self.public.verify(data, b"1234", mechanism=Mechanism.RSA_PKCS))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_with_reauthentication(self):
public, private = self.session.generate_keypair(
KeyType.RSA, 1024, private_template={Attribute.ALWAYS_AUTHENTICATE: True}
)
data = "INPUT"
signature = private.sign(data, pin=TOKEN_PIN)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_default(self):
data = b"HELLO WORLD" * 1024
signature = self.private.sign(data)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature))
self.assertFalse(self.public.verify(data, b"1234"))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_stream(self):
data = (
b"I" * 16,
b"N" * 16,
b"P" * 16,
b"U" * 16,
b"T" * 10,
)
signature = self.private.sign(data)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_stream_with_reauthentication(self):
public, private = self.session.generate_keypair(
KeyType.RSA, 1024, private_template={Attribute.ALWAYS_AUTHENTICATE: True}
)
data = (
b"I" * 16,
b"N" * 16,
b"P" * 16,
b"U" * 16,
b"T" * 10,
)
signature = private.sign(data, pin=TOKEN_PIN)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_stream_with_empty_blocks(self):
data = (
b"I" * 16,
b"N" * 16,
b"",
b"P" * 16,
b"" * 10,
b"U" * 16,
b"T" * 10,
)
signature = self.private.sign(data)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_stream_undersized_buffer(self):
data = (
b"I" * 16,
b"N" * 16,
b"P" * 16,
b"U" * 16,
b"T" * 10,
)
signature = self.private.sign(data, buffer_size=16)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_sign_stream_interrupt_releases_operation(self):
data = (
b"I" * 16,
b"N" * 16,
b"P" * 16,
b"U" * 16,
b"T" * 10,
)
def _data_with_error():
yield data[0]
yield data[1]
yield data[2]
raise ValueError
def attempt_sign():
self.private.sign(_data_with_error())
self.assertRaises(ValueError, attempt_sign)
# ...try again
signature = self.private.sign(data)
self.assertIsNotNone(signature)
self.assertIsInstance(signature, bytes)
self.assertTrue(self.public.verify(data, signature))
@requires(Mechanism.SHA512_RSA_PKCS)
def test_verify_stream_interrupt_releases_operation(self):
data = (
b"I" * 16,
b"N" * 16,
b"P" * 16,
b"U" * 16,
b"T" * 10,
)
def _data_with_error():
yield data[0]
yield data[1]
yield data[2]
raise ValueError
signature = self.private.sign(data)
def attempt_verify():
self.public.verify(_data_with_error(), signature)
self.assertRaises(ValueError, attempt_verify)
# ...try again
self.assertTrue(self.public.verify(data, signature))
@requires(Mechanism.RSA_PKCS_OAEP)
@FIXME.opencryptoki # can't set key attributes
def test_key_wrap(self):
key = self.session.generate_key(
KeyType.AES,
128,
template={
Attribute.EXTRACTABLE: True,
Attribute.SENSITIVE: False,
},
)
data = self.public.wrap_key(key)
self.assertNotEqual(data, key[Attribute.VALUE])
key2 = self.private.unwrap_key(
ObjectClass.SECRET_KEY,
KeyType.AES,
data,
template={
Attribute.EXTRACTABLE: True,
Attribute.SENSITIVE: False,
},
)
self.assertEqual(key[Attribute.VALUE], key2[Attribute.VALUE])
@requires(Mechanism.RSA_PKCS_OAEP)
def test_encrypt_oaep(self):
data = b"SOME DATA"
crypttext = self.public.encrypt(
data,
mechanism=Mechanism.RSA_PKCS_OAEP,
mechanism_param=(Mechanism.SHA_1, MGF.SHA1, None),
)
self.assertNotEqual(data, crypttext)
plaintext = self.private.decrypt(
crypttext,
mechanism=Mechanism.RSA_PKCS_OAEP,
mechanism_param=(Mechanism.SHA_1, MGF.SHA1, None),
)
self.assertEqual(data, plaintext)
@requires(Mechanism.SHA1_RSA_PKCS_PSS)
def test_sign_pss(self):
data = b"SOME DATA"
# These are the default params
signature = self.private.sign(
data,
mechanism=Mechanism.SHA1_RSA_PKCS_PSS,
mechanism_param=(Mechanism.SHA_1, MGF.SHA1, 20),
)
self.assertTrue(self.public.verify(data, signature, mechanism=Mechanism.SHA1_RSA_PKCS_PSS))
@requires(Mechanism.SHA1_RSA_PKCS_PSS)
def test_sign_pss_undersized_buffer(self):
data = b"SOME DATA"
signature = self.private.sign(
data,
mechanism=Mechanism.SHA1_RSA_PKCS_PSS,
mechanism_param=(Mechanism.SHA_1, MGF.SHA1, 20),
buffer_size=16,
)
self.assertTrue(self.public.verify(data, signature, mechanism=Mechanism.SHA1_RSA_PKCS_PSS))
@requires(Mechanism.RSA_PKCS_OAEP)
def test_encrypt_too_much_data(self):
data = b"1234" * 128
# You can't encrypt lots of data with RSA
# This should ideally throw DataLen but you can't trust it
with self.assertRaises(pkcs11.PKCS11Error):
self.public.encrypt(data)
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