Update tlslite to 0.4.6.

third_party/tlslite/tlslite/sharedkeydb.py

-"""Class for storing shared keys."""
-
-from utils.cryptomath import *
-from utils.compat import *
-from mathtls import *
-from session import Session
-from basedb import BaseDB
-
-class SharedKeyDB(BaseDB):
-    """This class represent an in-memory or on-disk database of shared
-    keys.
-
-    A SharedKeyDB can be passed to a server handshake function to
-    authenticate a client based on one of the shared keys.
-
-    This class is thread-safe.
-    """
-
-    def __init__(self, filename=None):
-        """Create a new SharedKeyDB.
-
-        @type filename: str
-        @param filename: Filename for an on-disk database, or None for
-        an in-memory database.  If the filename already exists, follow
-        this with a call to open().  To create a new on-disk database,
-        follow this with a call to create().
-        """
-        BaseDB.__init__(self, filename, "shared key")
-
-    def _getItem(self, username, valueStr):
-        session = Session()
-        session._createSharedKey(username, valueStr)
-        return session
-
-    def __setitem__(self, username, sharedKey):
-        """Add a shared key to the database.
-
-        @type username: str
-        @param username: The username to associate the shared key with.
-        Must be less than or equal to 16 characters in length, and must
-        not already be in the database.
-
-        @type sharedKey: str
-        @param sharedKey: The shared key to add.  Must be less than 48
-        characters in length.
-        """
-        BaseDB.__setitem__(self, username, sharedKey)
-
-    def _setItem(self, username, value):
-        if len(username)>16:
-            raise ValueError("username too long")
-        if len(value)>=48:
-            raise ValueError("shared key too long")
-        return value
-
-    def _checkItem(self, value, username, param):
-        newSession = self._getItem(username, param)
-        return value.masterSecret == newSession.masterSecret