def test_create_modulename():
cdef_source = "cdef sources go here"
source = "source code"
name = utils._create_modulename(cdef_source, source, "2.7")
assert name == "_Cryptography_cffi_bcba7f4bx4a14b588"
name = utils._create_modulename(cdef_source, source, "3.2")
assert name == "_Cryptography_cffi_a7462526x4a14b588"
mismatch |= Cryptography_constant_time_lt(block_len, pad_size);
/* Make sure any bits set are copied to the lowest bit */
mismatch |= mismatch >> 4;
mismatch |= mismatch >> 2;
mismatch |= mismatch >> 1;
/* Now check the low bit to see if it's set */
return (mismatch & 1) == 0;
}
"""
_ffi = cffi.FFI()
_ffi.cdef(TYPES)
_lib = _ffi.verify(
source=FUNCTIONS,
modulename=_create_modulename([TYPES], FUNCTIONS, sys.version),
ext_package="cryptography",
)
class PKCS7(object):
def __init__(self, block_size):
if not (0 <= block_size < 256):
raise ValueError("block_size must be in range(0, 256).")
if block_size % 8 != 0:
raise ValueError("block_size must be a multiple of 8.")
self.block_size = block_size
def padder(self):
if (len_a != len_b) {
return 0;
}
for (i = 0; i < len_a; i++) {
mismatch |= a[i] ^ b[i];
}
/* Make sure any bits set are copied to the lowest bit */
mismatch |= mismatch >> 4;
mismatch |= mismatch >> 2;
mismatch |= mismatch >> 1;
/* Now check the low bit to see if it's set */
return (mismatch & 1) == 0;
}
"""
_ffi = cffi.FFI()
_ffi.cdef(TYPES)
_lib = _ffi.verify(
source=FUNCTIONS,
modulename=_create_modulename([TYPES], FUNCTIONS, sys.version),
ext_package="cryptography",
)
def bytes_eq(a, b):
if not isinstance(a, bytes) or not isinstance(b, bytes):
raise TypeError("a and b must be bytes.")
return _lib.Cryptography_constant_time_bytes_eq(a, len(a), b, len(b)) == 1
mismatch |= ~Cryptography_constant_time_lt(0, pad_size);
mismatch |= Cryptography_constant_time_lt(block_len, pad_size);
/* Make sure any bits set are copied to the lowest bit */
mismatch |= mismatch >> 4;
mismatch |= mismatch >> 2;
mismatch |= mismatch >> 1;
/* Now check the low bit to see if it's set */
return (mismatch & 1) == 0;
}
"""
_ffi = cffi.FFI()
_ffi.cdef(TYPES)
_lib = _ffi.verify(
source=FUNCTIONS, modulename=_create_modulename([TYPES], FUNCTIONS, sys.version), ext_package="cryptography"
)
class PKCS7(object):
def __init__(self, block_size):
if not (0 <= block_size < 256):
raise ValueError("block_size must be in range(0, 256)")
if block_size % 8 != 0:
raise ValueError("block_size must be a multiple of 8")
self.block_size = block_size
def padder(self):
return _PKCS7PaddingContext(self.block_size)
