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69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
5 years ago
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# Copyright 2013 Donald Stufft and individual contributors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import, division, print_function
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class CryptoError(Exception):
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"""
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Base exception for all nacl related errors
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"""
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class BadSignatureError(CryptoError):
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"""
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Raised when the signature was forged or otherwise corrupt.
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"""
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class RuntimeError(RuntimeError, CryptoError):
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pass
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class AssertionError(AssertionError, CryptoError):
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pass
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class TypeError(TypeError, CryptoError):
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pass
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class ValueError(ValueError, CryptoError):
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pass
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class InvalidkeyError(CryptoError):
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pass
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def ensure(cond, *args, **kwds):
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"""
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Return if a condition is true, otherwise raise a caller-configurable
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:py:class:`Exception`
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:param bool cond: the condition to be checked
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:param sequence args: the arguments to be passed to the exception's
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constructor
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The only accepted named parameter is `raising` used to configure the
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exception to be raised if `cond` is not `True`
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"""
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_CHK_UNEXP = 'check_condition() got an unexpected keyword argument {0}'
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raising = kwds.pop('raising', AssertionError)
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if kwds:
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raise TypeError(_CHK_UNEXP.format(repr(kwds.popitem()[0])))
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if cond is True:
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return
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raise raising(*args)
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