New issue 612: Syntax error on assertion reinterpretation
https://bitbucket.org/hpk42/pytest/issue/612/syntax-error-on-assertion-reinterpretation
Alex Gaynor:
The function with the `assert` statement is:
```
def _ec_key_set_public_key_affine_coordinates(self, ctx, x, y):
"""
This is a port of EC_KEY_set_public_key_affine_coordinates that was
added in 1.0.1.
Sets the public key point in the EC_KEY context to the affine x and y
values.
"""
bn_x = self._int_to_bn(x)
bn_y = self._int_to_bn(y)
set_func, get_func, group = (
self._ec_key_determine_group_get_set_funcs(ctx)
)
point = self._lib.EC_POINT_new(group)
assert point != self._ffi.NULL
point = self._ffi.gc(point, self._lib.EC_POINT_free)
with self._tmp_bn_ctx() as bn_ctx:
check_x = self._lib.BN_CTX_get(bn_ctx)
check_y = self._lib.BN_CTX_get(bn_ctx)
res = set_func(group, point, bn_x, bn_y, bn_ctx)
assert res == 1
res = get_func(group, point, check_x, check_y, bn_ctx)
assert res == 1
assert (
self._lib.BN_cmp(bn_x, check_x) == 0 and
self._lib.BN_cmp(bn_y, check_y) == 0
)
res = self._lib.EC_KEY_set_public_key(ctx, point)
assert res == 1
res = self._lib.EC_KEY_check_key(ctx)
assert res == 1
return ctx
```
The specific assertion that's failing is the:
```
assert (
self._lib.BN_cmp(bn_x, check_x) == 0 and
self._lib.BN_cmp(bn_y, check_y) == 0
)
```
The source code that `py.test` is trying to compile is:
```
self._lib.BN_cmp(bn_x, check_x) == 0 and
self._lib.BN_cmp(bn_y, check_y) == 0
)
```
which is clearly a syntax error :-) The exact error message from `py.test` is:
```
__
TestPEMSerialization.test_load_pem_ec_private_key[backend1-ec_private_key_encrypted.pem-123456]
__
self = <tests.hazmat.primitives.test_serialization.TestPEMSerialization object
at 0x108dd8c90>
key_file = 'ec_private_key_encrypted.pem', password = '123456'
backend = <cryptography.hazmat.backends.openssl.backend.Backend object at
0x1089b5f90>
@pytest.mark.parametrize(
("key_file", "password"),
[
("ec_private_key.pem", None),
("ec_private_key_encrypted.pem", b"123456"),
]
)
@pytest.mark.elliptic
def test_load_pem_ec_private_key(self, key_file, password, backend):
_skip_curve_unsupported(backend, ec.SECP256R1())
key = load_vectors_from_file(
os.path.join(
"asymmetric", "PEM_Serialization", key_file),
> lambda pemfile: load_pem_private_key(
pemfile.read().encode(), password, backend
)
)
tests/hazmat/primitives/test_serialization.py:76:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _
tests/utils.py:102: in load_vectors_from_file
return loader(vector_file)
tests/hazmat/primitives/test_serialization.py:77: in <lambda>
pemfile.read().encode(), password, backend
cryptography/hazmat/primitives/serialization.py:59: in load_pem_private_key
return parser_type(backend).load_object(pem)
cryptography/hazmat/primitives/serialization.py:133: in load_object
).private_key(self._backend)
cryptography/hazmat/primitives/asymmetric/ec.py:279: in private_key
return backend.load_elliptic_curve_private_numbers(self)
cryptography/hazmat/backends/openssl/backend.py:881: in
load_elliptic_curve_private_numbers
ec_cdata, public.x, public.y)
../../.virtualenvs/cryptography-dev/lib/python2.7/site-packages/_pytest/assertion/reinterpret.py:40:
in __init__
self.msg = reinterpret(source, f, should_fail=True)
../../.virtualenvs/cryptography-dev/lib/python2.7/site-packages/_pytest/assertion/newinterpret.py:46:
in interpret
mod = ast.parse(source)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _
source = 'self._lib.BN_cmp(bn_x, check_x) == 0 and\nself._lib.BN_cmp(bn_y,
check_y) == 0\n )'
filename = '<unknown>', mode = 'exec'
def parse(source, filename='<unknown>', mode='exec'):
"""
Parse the source into an AST node.
Equivalent to compile(source, filename, mode, PyCF_ONLY_AST).
"""
> return compile(source, filename, mode, PyCF_ONLY_AST)
E File "<unknown>", line 1
E self._lib.BN_cmp(bn_x, check_x) == 0 and
E ^
E SyntaxError: invalid syntax
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ast.py:37:
SyntaxError
```
I haven't been able to further minimize the failure yet.
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