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These are implemented such that they don't depend on the backend. This means we don't have to worry about passing an RSA key created with one backend to a different one so much at the expense of having to create a backend specific context on demand. This is slightly non-trivial in (at least) OpenSSL as there are 3 additional derived parameters kept in its RSA struct. They aren't difficult to generate but it requires adding 30-40 lines of BN_* stuff to the backend so I'm leaving that out for now. We'll need to implement that before we can actually do any useful operations with the keys. This also adds a loader for some of the PKCS pyca#1 test vectors. It only extracts the 10 key pairs from pss_vect.txt currently be should be extenable to include the example signatures and other files later.
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# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or | ||
# implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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from __future__ import absolute_import, division, print_function | ||
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import six | ||
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from cryptography import utils | ||
from cryptography.hazmat.primitives import interfaces | ||
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def _bit_length(x): | ||
try: | ||
return x.bit_length() | ||
except AttributeError: | ||
return len(bin(x)) - (2 + (x <= 0)) | ||
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@utils.register_interface(interfaces.RSAPublicKey) | ||
class RSAPublicKey(object): | ||
def __init__(self, public_exponent, modulus): | ||
if ( | ||
not isinstance(public_exponent, six.integer_types) or | ||
not isinstance(modulus, six.integer_types) | ||
): | ||
raise TypeError("RSAPublicKey arguments must be integers") | ||
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self._public_exponent = public_exponent | ||
self._modulus = modulus | ||
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@property | ||
def key_size(self): | ||
return _bit_length(self.modulus) | ||
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@property | ||
def public_exponent(self): | ||
return self._public_exponent | ||
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@property | ||
def modulus(self): | ||
return self._modulus | ||
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@property | ||
def e(self): | ||
return self.public_exponent | ||
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@property | ||
def n(self): | ||
return self.modulus | ||
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@utils.register_interface(interfaces.RSAPrivateKey) | ||
class RSAPrivateKey(object): | ||
def __init__(self, p, q, private_exponent, public_exponent, modulus): | ||
if ( | ||
not isinstance(p, six.integer_types) or | ||
not isinstance(q, six.integer_types) or | ||
not isinstance(private_exponent, six.integer_types) or | ||
not isinstance(public_exponent, six.integer_types) or | ||
not isinstance(modulus, six.integer_types) | ||
): | ||
raise TypeError("RSAPrivateKey arguments must be integers") | ||
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self._p = p | ||
self._q = q | ||
self._private_exponent = private_exponent | ||
self._public_exponent = public_exponent | ||
self._modulus = modulus | ||
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@property | ||
def key_size(self): | ||
return _bit_length(self.modulus) | ||
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def public_key(self): | ||
return RSAPublicKey(self.public_exponent, self.modulus) | ||
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@property | ||
def p(self): | ||
return self._p | ||
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@property | ||
def q(self): | ||
return self._q | ||
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@property | ||
def private_exponent(self): | ||
return self._private_exponent | ||
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@property | ||
def public_exponent(self): | ||
return self._public_exponent | ||
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@property | ||
def modulus(self): | ||
return self._modulus | ||
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@property | ||
def d(self): | ||
return self.private_exponent | ||
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@property | ||
def e(self): | ||
return self.public_exponent | ||
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@property | ||
def n(self): | ||
return self.modulus |
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# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or | ||
# implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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from __future__ import absolute_import, division, print_function | ||
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import pytest | ||
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from cryptography.hazmat.primitives.asymmetric import rsa | ||
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from ...utils import load_pkcs1_vectors, load_vectors_from_file | ||
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class TestRSA(object): | ||
@pytest.mark.parametrize( | ||
"pkcs1_example", | ||
load_vectors_from_file( | ||
"asymmetric/RSA/pkcs-1v2-1d2-vec/pss-vect.txt", | ||
load_pkcs1_vectors | ||
) | ||
) | ||
def test_load_pss_vect_example_keys(self, pkcs1_example): | ||
secret, public = pkcs1_example | ||
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skey = rsa.RSAPrivateKey(**secret) | ||
pkey = rsa.RSAPublicKey(**public) | ||
pkey2 = skey.public_key() | ||
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assert skey and pkey and pkey2 | ||
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assert skey.modulus | ||
assert skey.modulus == pkey.modulus | ||
assert skey.public_exponent == pkey.public_exponent | ||
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assert pkey.modulus | ||
assert pkey.modulus == pkey2.modulus | ||
assert pkey.public_exponent == pkey2.public_exponent | ||
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assert skey.key_size | ||
assert skey.key_size == pkey.key_size | ||
assert skey.key_size == pkey2.key_size | ||
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def test_invalid_arguments(self): | ||
with pytest.raises(TypeError): | ||
rsa.RSAPrivateKey(None, None, None, None, None) | ||
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with pytest.raises(TypeError): | ||
rsa.RSAPublicKey(None, None) |