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==================================================================
:class:`passlib.hash.nthash` - Windows NT-HASH for Unix
==================================================================
.. currentmodule:: passlib.hash
.. warning::
This scheme is notoriously weak (since it's based on :mod:`~passlib.utils.md4`).
Online tables exist for quickly performing pre-image attacks on this scheme.
**Do not use** in new code. Stop using in old code if possible.
This module implements the Windows NT-HASH algorithm,
encoded in a manner compatible with the :ref:`modular-crypt-format`.
It is found on some unix systems where the administrator has decided
to store user passwords in a manner compatible with the SMB/CIFS protocol.
It has no salt, or variable rounds.
Usage
=====
.. todo::
document usage
Functions
=========
.. autoclass:: nthash
In addition to the normal password hash api, this module also exposes
the following:
.. function:: raw_nthash(secret, hex=False)
perform raw nthash calculation, returning either
raw digest, or as lower-case hexidecimal characters.
Format & Algorithm
==================
A nthash encoded for crypt consists of ``$3$${checksum}`` or
``$NT${checksum}``; where ``{checksum}`` is 32 hexidecimal digits
encoding the checksum. An example hash (of ``password``) is ``$3$$8846f7eaee8fb117ad06bdd830b7586c``.
The checksum is simply the :mod:`~passlib.utils.md4` digest
of the secret using the ``UTF16-LE`` encoding, encoded in hexidecimal
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