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# ‡ˆl–Ým_JJe Ju@½p!¸ËŠbÑ¿ê „tM ¯Âè ?÷ ‡"""passlib.totp -- TOTP / RFC6238 / Google Authenticator utilities.""" #============================================================================= # imports #============================================================================= from __future__ import absolute_import, division, print_function from passlib.utils.compat import PY3 # core import base64 import collections import calendar import json import logging; log = logging.getLogger(__name__) import math import struct import sys import time as _time import re if PY3: from urllib.parse import urlparse, parse_qsl, quote, unquote else: from urllib import quote, unquote from urlparse import urlparse, parse_qsl from warnings import warn # site try: # TOTP encrypted keys only supported if cryptography (https://cryptography.io) is installed from cryptography.hazmat.backends import default_backend as _cg_default_backend import cryptography.hazmat.primitives.ciphers.algorithms import cryptography.hazmat.primitives.ciphers.modes from cryptography.hazmat.primitives import ciphers as _cg_ciphers del cryptography except ImportError: log.debug("can't import 'cryptography' package, totp encryption disabled") _cg_ciphers = _cg_default_backend = None # pkg from passlib import exc from passlib.exc import TokenError, MalformedTokenError, InvalidTokenError, UsedTokenError from passlib.utils import (to_unicode, to_bytes, consteq, getrandbytes, rng, SequenceMixin, xor_bytes, getrandstr) from passlib.utils.binary import BASE64_CHARS, b32encode, b32decode from passlib.utils.compat import (u, unicode, native_string_types, bascii_to_str, int_types, num_types, irange, byte_elem_value, UnicodeIO, suppress_cause) from passlib.utils.decor import hybrid_method, memoized_property from passlib.crypto.digest import lookup_hash, compile_hmac, pbkdf2_hmac from passlib.hash import pbkdf2_sha256 # local __all__ = [ # frontend classes "AppWallet", "TOTP", # errors (defined in passlib.exc, but exposed here for convenience) "TokenError", "MalformedTokenError", "InvalidTokenError", "UsedTokenError", # internal helper classes "TotpToken", "TotpMatch", ] #============================================================================= # HACK: python < 2.7.4's urlparse() won't parse query strings unless the url scheme # is one of the schemes in the urlparse.uses_query list. 2.7 abandoned # this, and parses query if present, regardless of the scheme. # as a workaround for older versions, we add "otpauth" to the known list. # this was fixed by https://bugs.python.org/issue9374, in 2.7.4 release. #============================================================================= if sys.version_info < (2,7,4): from urlparse import uses_query if "otpauth" not in uses_query: uses_query.append("otpauth") log.debug("registered 'otpauth' scheme with urlparse.uses_query") del uses_query #============================================================================= # internal helpers #============================================================================= #----------------------------------------------------------------------------- # token parsing / rendering helpers #----------------------------------------------------------------------------- #: regex used to clean whitespace from tokens & keys _clean_re = re.compile(u(r"\s|[-=]"), re.U) _chunk_sizes = [4,6,5] def _get_group_size(klen): """ helper for group_string() -- calculates optimal size of grou