本文整理汇总了Python中cryptography.hazmat.backends.interfaces.HMACBackend方法的典型用法代码示例。如果您正苦于以下问题：Python interfaces.HMACBackend方法的具体用法？Python interfaces.HMACBackend怎么用？Python interfaces.HMACBackend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.HMACBackend方法的8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 HMACBackend [as 别名]
def __init__(self, key, algorithm, backend, ctx=None):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
if not isinstance(algorithm, hashes.HashAlgorithm):
raise TypeError("Expected instance of hashes.HashAlgorithm.")
self._algorithm = algorithm
self._backend = backend
self._key = key
if ctx is None:
self._ctx = self._backend.create_hmac_ctx(key, self.algorithm)
else:
self._ctx = ctx 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 HMACBackend [as 别名]
def __init__(self, algorithm, length, salt, info, backend):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._algorithm = algorithm
if not (salt is None or isinstance(salt, bytes)):
raise TypeError("salt must be bytes.")
if salt is None:
salt = b"\x00" * (self._algorithm.digest_size // 8)
self._salt = salt
self._backend = backend
self._hkdf_expand = HKDFExpand(self._algorithm, length, info, backend) 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 HMACBackend [as 别名]
def __init__(self, algorithm, length, salt, 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 (salt is None or isinstance(salt, bytes)):
raise TypeError("salt must be bytes.")
if salt is None:
salt = b"\x00" * algorithm.block_size
self._salt = salt
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._backend = backend
self._used = False 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 HMACBackend [as 别名]
def __init__(self, key, length, algorithm, backend):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
if len(key) < 16:
raise ValueError("Key length has to be at least 128 bits.")
if not isinstance(length, six.integer_types):
raise TypeError("Length parameter must be an integer type.")
if length < 6 or length > 8:
raise ValueError("Length of HOTP has to be between 6 to 8.")
if not isinstance(algorithm, (SHA1, SHA256, SHA512)):
raise TypeError("Algorithm must be SHA1, SHA256 or SHA512.")
self._key = key
self._length = length
self._algorithm = algorithm
self._backend = backend 示例5: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HMACBackend [as 别名]
def __init__(self, algorithm, length, salt, info, backend):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._algorithm = algorithm
if not (salt is None or isinstance(salt, bytes)):
raise TypeError("salt must be bytes.")
if salt is None:
salt = b"\x00" * self._algorithm.digest_size
self._salt = salt
self._backend = backend
self._hkdf_expand = HKDFExpand(self._algorithm, length, info, backend) 示例6: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HMACBackend [as 别名]
def __init__(self, algorithm, length, salt, info, backend):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._algorithm = algorithm
if salt is None:
salt = b"\x00" * self._algorithm.digest_size
else:
utils._check_bytes("salt", salt)
self._salt = salt
self._backend = backend
self._hkdf_expand = HKDFExpand(self._algorithm, length, info, backend) 示例7: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HMACBackend [as 别名]
def __init__(self, key, length, algorithm, backend,
enforce_key_length=True):
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
if len(key) < 16 and enforce_key_length is True:
raise ValueError("Key length has to be at least 128 bits.")
if not isinstance(length, six.integer_types):
raise TypeError("Length parameter must be an integer type.")
if length < 6 or length > 8:
raise ValueError("Length of HOTP has to be between 6 to 8.")
if not isinstance(algorithm, (SHA1, SHA256, SHA512)):
raise TypeError("Algorithm must be SHA1, SHA256 or SHA512.")
self._key = key
self._length = length
self._algorithm = algorithm
self._backend = backend 示例8: __init__
# 需要导入模块: from cryptography.hazmat.backends import interfaces [as 别名]
# 或者: from cryptography.hazmat.backends.interfaces import HMACBackend [as 别名]
def __init__(self, algorithm, length, salt, 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 salt is None:
salt = b"\x00" * algorithm.block_size
else:
utils._check_bytes("salt", salt)
self._salt = salt
if not isinstance(backend, HMACBackend):
raise UnsupportedAlgorithm(
"Backend object does not implement HMACBackend.",
_Reasons.BACKEND_MISSING_INTERFACE
)
self._backend = backend
self._used = False