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"""passlib.handlers.postgres_md5 - MD5-based algorithm used by Postgres for pg_shadow table""" #============================================================================= # imports #============================================================================= # core from hashlib import md5 import logging; log = logging.getLogger(__name__) # site # pkg from passlib.utils import to_bytes from passlib.utils.compat import str_to_uascii, unicode, u import passlib.utils.handlers as uh # local __all__ = [ "postgres_md5", ] #============================================================================= # handler #============================================================================= class postgres_md5(uh.HasUserContext, uh.StaticHandler): """This class implements the Postgres MD5 Password hash, and follows the :ref:`password-hash-api`. It does a single round of hashing, and relies on the username as the salt. The :meth:`~passlib.ifc.PasswordHash.hash`, :meth:`~passlib.ifc.PasswordHash.genhash`, and :meth:`~passlib.ifc.PasswordHash.verify` methods all require the following additional contextual keywords: :type user: str :param user: name of postgres user account this password is associated with. """ #=================================================================== # algorithm information #=================================================================== name = "postgres_md5" _hash_prefix = u("md5") checksum_chars = uh.HEX_CHARS checksum_size = 32 #=================================================================== # primary interface #=================================================================== def _calc_checksum(self, secret): if isinstance(secret, unicode): secret = secret.encode("utf-8") user = to_bytes(self.user, "utf-8", param="user") return str_to_uascii(md5(secret + user).hexdigest()) #=================================================================== # eoc #=================================================================== #============================================================================= # eof #=============================================================================