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y 0` """passlib.handlers.nthash - Microsoft Windows -related hashes""" #============================================================================= # imports #============================================================================= # core from binascii import hexlify import logging; log = logging.getLogger(__name__) from warnings import warn # site # pkg from passlib.utils import to_unicode, right_pad_string from passlib.utils.compat import unicode from passlib.crypto.digest import lookup_hash md4 = lookup_hash("md4").const import passlib.utils.handlers as uh # local __all__ = [ "lmhash", "nthash", "bsd_nthash", "msdcc", "msdcc2", ] #============================================================================= # lanman hash #============================================================================= class lmhash(uh.TruncateMixin, uh.HasEncodingContext, uh.StaticHandler): """This class implements the Lan Manager Password hash, and follows the :ref:`password-hash-api`. It has no salt and a single fixed round. The :meth:`~passlib.ifc.PasswordHash.using` method accepts a single optional keyword: :param bool truncate_error: By default, this will silently truncate passwords larger than 14 bytes. Setting ``truncate_error=True`` will cause :meth:`~passlib.ifc.PasswordHash.hash` to raise a :exc:`~passlib.exc.PasswordTruncateError` instead. .. versionadded:: 1.7 The :meth:`~passlib.ifc.PasswordHash.hash` and :meth:`~passlib.ifc.PasswordHash.verify` methods accept a single optional keyword: :type encoding: str :param encoding: This specifies what character encoding LMHASH should use when calculating digest. It defaults to ``cp437``, the most common encoding encountered. Note that while this class outputs digests in lower-case hexadecimal, it will accept upper-case as well. """ #=================================================================== # class attrs #=================================================================== #-------------------- # PasswordHash #-------------------- name = "lmhash" setting_kwds = ("truncate_error",) #-------------------- # GenericHandler #-------------------- checksum_chars = uh.HEX_CHARS checksum_size = 32 #-------------------- # TruncateMixin #-------------------- truncate_size = 14 #-------------------- # custom #-------------------- default_encoding = "cp437" #=================================================================== # methods #=================================================================== @classmethod def _norm_hash(cls, hash): return hash.lower() def _calc_checksum(self, secret): # check for truncation (during .hash() calls only) if self.use_defaults: self._check_truncate_policy(secret) return hexlify(self.raw(secret, self.encoding)).decode("ascii") # magic constant used by LMHASH _magic = b"KGS!@#$%" @classmethod def raw(cls, secret, encoding=None): """encode password using LANMAN hash algorithm. :type secret: unicode or utf-8 encoded bytes :arg secret: secret to hash :type encoding: str :arg encoding: optional encoding to use for unicode inputs. this defaults to ``cp437``, which is the common case for most situations. :returns: returns string of raw bytes """ if not encoding: encoding = cls.default_encoding # some nice empircal data