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49 lines
1.7 KiB
49 lines
1.7 KiB
#!/usr/bin/env python
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# Copyright (c) 2014 clowwindy
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from __future__ import absolute_import, division, print_function, \
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with_statement
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import hmac
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from shadowsocks import common
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__all__ = ['auths']
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class HMAC(object):
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@staticmethod
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def auth(method, key, data):
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digest = common.to_str(method.replace(b'hmac-', b''))
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return hmac.new(key, data, digest).digest()
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@staticmethod
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def verify(method, key, data, tag):
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digest = common.to_str(method.replace(b'hmac-', b''))
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t = hmac.new(key, data, digest).digest()
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return hmac.compare_digest(t, tag)
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auths = {
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b'hmac-md5': (32, 16, HMAC),
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b'hmac-sha256': (32, 32, HMAC),
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}
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