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Package twisted :: Package python :: Module otp :: Class OTP |
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OTPAuthenticator
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OTP
An automatic version of the OTP-Authenticator
Updates the sequence and the keeps last approved password on success On the next authentication, the stored password is hashed and checked up against the one given by the user. If they match, the sequencecounter is decreased and the circle is closed.
This object should be glued to each user
Note: It does NOT reset the sequence when the combinations left approach zero, This has to be done manuelly by instancing a new objectMethod Summary | |
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Initialize the OTP-Sequence, and discard the password | |
Test the phrase against the last challenge issued | |
Calculate the parity from a 64bit OTP (inherited from OTPAuthenticator )
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Return a challenge string | |
foldDigest(self,
otp)
(inherited from OTPAuthenticator )
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Fold a 128 bit digest to 64 bit (inherited from OTPAuthenticator )
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Fold a 160 bit digest to 64 bit (inherited from OTPAuthenticator )
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Return a 64 bit OTP based on inputs Run through makeReadable to get a 6 word pass-phrase (inherited from OTPAuthenticator )
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Return a 10 char random seed, with 6 lowercase chars and 4 digits (inherited from OTPAuthenticator )
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Run through the hash and fold to 64 bit (inherited from OTPAuthenticator )
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Returns a 6 word pass-phrase from a 64bit OTP (inherited from OTPAuthenticator )
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Decode the phrase, and return a 64bit OTP I will raise Unauthorized if the parity is wrong TODO: Add support for hex (MUST) and the '2nd scheme'(SHOULD) (inherited from OTPAuthenticator )
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Class Variable Summary | |
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NoneType |
lastotp
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NoneType |
seed
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int |
sequence
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Method Details |
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__init__(self,
passwd,
sequence=1000,
hash=<module 'md5' from '/usr/lib/python2.2/...)
Initialize the OTP-Sequence, and discard the password
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authenticate(self, phrase)Test the phrase against the last challenge issued |
challenge(self)Return a challenge string |
Class Variable Details |
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lastotp
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seed
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sequence
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