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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.
from __future__ import absolute_import, division, print_function
import itertools
import os
import pytest
from cryptography.hazmat.primitives.asymmetric import rsa
from ...utils import load_pkcs1_vectors, load_vectors_from_file
def _check_rsa_private_key(skey):
assert skey
assert skey.modulus
assert skey.public_exponent
assert skey.private_exponent
assert skey.p * skey.q == skey.modulus
assert skey.key_size
pkey = skey.public_key()
assert pkey
assert skey.modulus == pkey.modulus
assert skey.public_exponent == pkey.public_exponent
assert skey.key_size == pkey.key_size
@pytest.mark.rsa
class TestRSA(object):
@pytest.mark.parametrize(
"public_exponent,key_size",
itertools.product(
(3, 5, 65537),
(1024, 1025, 1026, 1027, 1028, 1029, 1030, 1031, 1536, 2048)
)
)
def test_generate_rsa_keys(self, backend, public_exponent, key_size):
skey = rsa.RSAPrivateKey.generate(public_exponent, key_size, backend)
_check_rsa_private_key(skey)
assert skey.key_size == key_size
assert skey.public_exponent == public_exponent
def test_generate_bad_rsa_key(self, backend):
with pytest.raises(ValueError):
rsa.RSAPrivateKey.generate(public_exponent=1,
key_size=2048,
backend=backend)
with pytest.raises(ValueError):
rsa.RSAPrivateKey.generate(public_exponent=4,
key_size=2048,
backend=backend)
def test_cant_generate_insecure_tiny_key(self, backend):
with pytest.raises(ValueError):
rsa.RSAPrivateKey.generate(public_exponent=65537,
key_size=511,
backend=backend)
with pytest.raises(ValueError):
rsa.RSAPrivateKey.generate(public_exponent=65537,
key_size=256,
backend=backend)
@pytest.mark.parametrize(
"pkcs1_example",
load_vectors_from_file(
os.path.join(
"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
skey = rsa.RSAPrivateKey(**secret)
assert skey
_check_rsa_private_key(skey)
pkey = rsa.RSAPublicKey(**public)
assert pkey
pkey2 = skey.public_key()
assert pkey2
assert skey.modulus == pkey.modulus
assert skey.modulus == skey.n
assert skey.public_exponent == pkey.public_exponent
assert skey.public_exponent == skey.e
assert skey.private_exponent == skey.d
assert pkey.modulus
assert pkey.modulus == pkey2.modulus
assert pkey.modulus == pkey.n
assert pkey.public_exponent == pkey2.public_exponent
assert pkey.public_exponent == pkey.e
assert skey.key_size
assert skey.key_size == pkey.key_size
assert skey.key_size == pkey2.key_size
def test_invalid_private_key_argument_types(self):
with pytest.raises(TypeError):
rsa.RSAPrivateKey(None, None, None, None, None)
def test_invalid_public_key_argument_types(self):
with pytest.raises(TypeError):
rsa.RSAPublicKey(None, None)
def test_invalid_private_key_argument_values(self):
# Start with p=3, q=5, private_exponent=14, public_exponent=7,
# modulus=15. Then change one value at a time to test the bounds.
# Test a modulus < 3.
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=14,
public_exponent=7,
modulus=2
)
# Test a modulus != p * q.
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=14,
public_exponent=7,
modulus=16
)
# Test a p > modulus.
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=16,
q=5,
private_exponent=14,
public_exponent=7,
modulus=15
)
# Test a q > modulus.
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=16,
private_exponent=14,
public_exponent=7,
modulus=15
)
# Test a private_exponent > modulus
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=16,
public_exponent=7,
modulus=15
)
# Test a public_exponent < 3
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=14,
public_exponent=1,
modulus=15
)
# Test a public_exponent > modulus
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=14,
public_exponent=17,
modulus=15
)
# Test a public_exponent that is not odd.
with pytest.raises(ValueError):
rsa.RSAPrivateKey(
p=3,
q=5,
private_exponent=14,
public_exponent=6,
modulus=15
)
def test_invalid_public_key_argument_values(self):
# Start with public_exponent=7, modulus=15. Then change one value at a
# time to test the bounds.
# Test a modulus < 3.
with pytest.raises(ValueError):
rsa.RSAPublicKey(public_exponent=7, modulus=2)
# Test a public_exponent < 3
with pytest.raises(ValueError):
rsa.RSAPublicKey(public_exponent=1, modulus=15)
# Test a public_exponent > modulus
with pytest.raises(ValueError):
rsa.RSAPublicKey(public_exponent=17, modulus=15)
# Test a public_exponent that is not odd.
with pytest.raises(ValueError):
rsa.RSAPublicKey(public_exponent=6, modulus=15)
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