diff options
Diffstat (limited to 'tests/hazmat')
| -rw-r--r-- | tests/hazmat/primitives/test_rsa.py | 183 |
1 files changed, 155 insertions, 28 deletions
diff --git a/tests/hazmat/primitives/test_rsa.py b/tests/hazmat/primitives/test_rsa.py index 0e930e44..a413f10b 100644 --- a/tests/hazmat/primitives/test_rsa.py +++ b/tests/hazmat/primitives/test_rsa.py @@ -24,6 +24,19 @@ from cryptography.hazmat.primitives.asymmetric import rsa from ...utils import load_pkcs1_vectors, load_vectors_from_file +def _modinv(e, m): + """ + Modular Multiplicative Inverse. Returns x such that: (x*e) mod m == 1 + """ + x1, y1, x2, y2 = 1, 0, 0, 1 + a, b = e, m + while b > 0: + q, r = divmod(a, b) + xn, yn = x1 - q * x2, y1 - q * y2 + a, b, x1, y1, x2, y2 = b, r, x2, y2, xn, yn + return x1 % m + + def _check_rsa_private_key(skey): assert skey assert skey.modulus @@ -31,6 +44,9 @@ def _check_rsa_private_key(skey): assert skey.private_exponent assert skey.p * skey.q == skey.modulus assert skey.key_size + assert skey.dmp1 == skey.d % (skey.p - 1) + assert skey.dmq1 == skey.d % (skey.q - 1) + assert skey.iqmp == _modinv(skey.q, skey.p) pkey = skey.public_key() assert pkey @@ -39,6 +55,27 @@ def _check_rsa_private_key(skey): assert skey.key_size == pkey.key_size +def test_modular_inverse(): + p = int( + "d1f9f6c09fd3d38987f7970247b85a6da84907753d42ec52bc23b745093f4fff5cff3" + "617ce43d00121a9accc0051f519c76e08cf02fc18acfe4c9e6aea18da470a2b611d2e" + "56a7b35caa2c0239bc041a53cc5875ca0b668ae6377d4b23e932d8c995fd1e58ecfd8" + "c4b73259c0d8a54d691cca3f6fb85c8a5c1baf588e898d481", 16 + ) + q = int( + "d1519255eb8f678c86cfd06802d1fbef8b664441ac46b73d33d13a8404580a33a8e74" + "cb2ea2e2963125b3d454d7a922cef24dd13e55f989cbabf64255a736671f4629a47b5" + "b2347cfcd669133088d1c159518531025297c2d67c9da856a12e80222cd03b4c6ec0f" + "86c957cb7bb8de7a127b645ec9e820aa94581e4762e209f01", 16 + ) + assert _modinv(q, p) == int( + "0275e06afa722999315f8f322275483e15e2fb46d827b17800f99110b269a6732748f" + "624a382fa2ed1ec68c99f7fc56fb60e76eea51614881f497ba7034c17dde955f92f15" + "772f8b2b41f3e56d88b1e096cdd293eba4eae1e82db815e0fadea0c4ec971bc6fd875" + "c20e67e48c31a611e98d32c6213ae4c4d7b53023b2f80c538", 16 + ) + + @pytest.mark.rsa class TestRSA(object): @pytest.mark.parametrize( @@ -115,22 +152,26 @@ class TestRSA(object): def test_invalid_private_key_argument_types(self): with pytest.raises(TypeError): - rsa.RSAPrivateKey(None, None, None, None, None) + rsa.RSAPrivateKey(None, None, None, 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. + # Start with p=3, q=11, private_exponent=3, public_exponent=7, + # modulus=33, dmp1=1, dmq1=3, iqmp=2. 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, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=7, modulus=2 ) @@ -139,70 +180,156 @@ class TestRSA(object): with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=5, - private_exponent=14, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=7, - modulus=16 + modulus=35 ) # Test a p > modulus. with pytest.raises(ValueError): rsa.RSAPrivateKey( - p=16, - q=5, - private_exponent=14, + p=37, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=7, - modulus=15 + modulus=33 ) # Test a q > modulus. with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=16, - private_exponent=14, + q=37, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, + public_exponent=7, + modulus=33 + ) + + # Test a dmp1 > modulus. + with pytest.raises(ValueError): + rsa.RSAPrivateKey( + p=3, + q=11, + private_exponent=3, + dmp1=35, + dmq1=3, + iqmp=2, + public_exponent=7, + modulus=33 + ) + + # Test a dmq1 > modulus. + with pytest.raises(ValueError): + rsa.RSAPrivateKey( + p=3, + q=11, + private_exponent=3, + dmp1=1, + dmq1=35, + iqmp=2, public_exponent=7, - modulus=15 + modulus=33 + ) + + # Test an iqmp > modulus. + with pytest.raises(ValueError): + rsa.RSAPrivateKey( + p=3, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=35, + public_exponent=7, + modulus=33 ) # Test a private_exponent > modulus with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=5, - private_exponent=16, + q=11, + private_exponent=37, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=7, - modulus=15 + modulus=33 ) # Test a public_exponent < 3 with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=5, - private_exponent=14, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=1, - modulus=15 + modulus=33 ) # Test a public_exponent > modulus with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=5, - private_exponent=14, - public_exponent=17, - modulus=15 + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, + public_exponent=65537, + modulus=33 ) # Test a public_exponent that is not odd. with pytest.raises(ValueError): rsa.RSAPrivateKey( p=3, - q=5, - private_exponent=14, + q=11, + private_exponent=3, + dmp1=1, + dmq1=3, + iqmp=2, public_exponent=6, - modulus=15 + modulus=33 + ) + + # Test a dmp1 that is not odd. + with pytest.raises(ValueError): + rsa.RSAPrivateKey( + p=3, + q=11, + private_exponent=3, + dmp1=2, + dmq1=3, + iqmp=2, + public_exponent=7, + modulus=33 + ) + + # Test a dmq1 that is not odd. + with pytest.raises(ValueError): + rsa.RSAPrivateKey( + p=3, + q=11, + private_exponent=3, + dmp1=1, + dmq1=4, + iqmp=2, + public_exponent=7, + modulus=33 ) def test_invalid_public_key_argument_values(self): |