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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function
from cryptography.hazmat.bindings.utils import (
build_ffi_for_binding, load_library_for_binding,
)
class Binding(object):
"""
CommonCrypto API wrapper.
"""
_module_prefix = "cryptography.hazmat.bindings.commoncrypto."
_modules = [
"cf",
"common_digest",
"common_hmac",
"common_key_derivation",
"common_cryptor",
"secimport",
"secitem",
"seckey",
"seckeychain",
"sectransform",
]
ffi = build_ffi_for_binding(
module_prefix=_module_prefix,
modules=_modules,
extra_link_args=[
"-framework", "Security", "-framework", "CoreFoundation"
],
)
lib = None
def __init__(self):
self._ensure_ffi_initialized()
@classmethod
def _ensure_ffi_initialized(cls):
if cls.lib is not None:
return
cls.lib = load_library_for_binding(
cls.ffi,
module_prefix=cls._module_prefix,
modules=cls._modules,
)
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