本文整理汇总了Python中cryptography.hazmat.backends.interfaces.HashBackend方法的典型用法代码示例。如果您正苦于以下问题：Python interfaces.HashBackend方法的具体用法？Python interfaces.HashBackend怎么用？Python interfaces.HashBackend使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类cryptography.hazmat.backends.interfaces的用法示例。
在下文中一共展示了interfaces.HashBackend方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HashBackend [as 别名]
def __init__(self, algorithm, length, otherinfo, backend):
_common_args_checks(algorithm, length, otherinfo)
self._algorithm = algorithm
self._length = length
self._otherinfo = otherinfo
if self._otherinfo is None:
self._otherinfo = b""
if not isinstance(backend, HashBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HashBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._backend = backend
self._used = False 示例2: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HashBackend [as 别名]
def __init__(self, algorithm, length, sharedinfo, backend):
max_len = algorithm.digest_size * (2 ** 32 - 1)
if length > max_len:
raise ValueError(
"Can not derive keys larger than {0} bits.".format(max_len))
if not (sharedinfo is None or isinstance(sharedinfo, bytes)):
raise TypeError("sharedinfo must be bytes.")
self._algorithm = algorithm
self._length = length
self._sharedinfo = sharedinfo
if not isinstance(backend, HashBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HashBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._backend = backend
self._used = False 示例3: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HashBackend [as 别名]
def __init__(self, algorithm, backend, ctx=None):
if not isinstance(backend, HashBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HashBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
if not isinstance(algorithm, HashAlgorithm):
raise TypeError("Expected instance of hashes.HashAlgorithm.")
self._algorithm = algorithm
self._backend = backend
if ctx is None:
self._ctx = self._backend.create_hash_ctx(self.algorithm)
else:
self._ctx = ctx 示例4: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HashBackend [as 别名]
def __init__(self, algorithm, length, sharedinfo, backend):
max_len = algorithm.digest_size * (2 ** 32 - 1)
if length > max_len:
raise ValueError(
"Can not derive keys larger than {} bits.".format(max_len))
if sharedinfo is not None:
utils._check_bytes("sharedinfo", sharedinfo)
self._algorithm = algorithm
self._length = length
self._sharedinfo = sharedinfo
if not isinstance(backend, HashBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HashBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._backend = backend
self._used = False