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Module: otp Twisted-0.19.0/twisted/python/otp.py

A One-Time Password System based on RFC 2289

The class Authenticator contains the hashing-logic, and the parser for the readable output. It also contains challenge which returns a string describing the authentication scheme for a client.

OTP is a password container for an user on a server.

NOTE: Does not take care of transmitting the shared secret password.

At the end there's a dict called dict which is dictionary contain 2048 words for storing pronouncable 11-bit values. Taken from RFC 1760.

Uses the MD5- and SHA-algorithms for hashing

Todo: RFC2444, SASL (perhaps), parsing hex-responses

Imported modules   
import md5
import random
import sha
import string
Functions   
longToString
stringToDWords
stringToLong
  longToString 
longToString ( l )

Convert long to digest

  stringToDWords 
stringToDWords ( s )

Convert digest to a list of four 32-bits words

  stringToLong 
stringToLong ( s )

Convert digest to long

Classes   
OTP

An automatic version of the OTP-Authenticator

OTPAuthenticator

A One Time Password System

Unauthorized

the Unauthorized exception


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