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s�This class implements the MD5-Crypt password hash, and follows the :ref:`password-hash-api`.
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:type salt: str
:param salt:
Optional salt string.
If not specified, one will be autogenerated (this is recommended).
If specified, it must be 0-8 characters, drawn from the regexp range ``[./0-9A-Za-z]``.
:type salt_size: int
:param salt_size:
Optional number of characters to use when autogenerating new salts.
Defaults to 8, but can be any value between 0 and 8.
(This is mainly needed when generating Cisco-compatible hashes,
which require ``salt_size=4``).
:type relaxed: bool
:param relaxed:
By default, providing an invalid value for one of the other
keywords will result in a :exc:`ValueError`. If ``relaxed=True``,
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.. versionadded:: 1.6
Rs$1$tos_crypttbuiltincCs+tdd�r#|j|j�tStSdS(Nttests $1$test$pi/xDtU5WFVRqYS6BMU8X/(Rt_set_calc_checksum_backendt_calc_checksum_os_crypttTruetFalse(R6((s>/usr/lib/python2.7/site-packages/passlib/handlers/md5_crypt.pyt_load_backend_os_cryptscCso|j|j}t||�}|r^|j|�rPt|�t|�dksVt�|d S|j|�SdS(Nii��(R5R Rt
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It supports a variable-length salt.
The :meth:`~passlib.ifc.PasswordHash.using` method accepts the following optional keywords:
:type salt: str
:param salt:
Optional salt string.
If not specified, one will be autogenerated (this is recommended).
If specified, it must be 0-8 characters, drawn from the regexp range ``[./0-9A-Za-z]``.
:type relaxed: bool
:param relaxed:
By default, providing an invalid value for one of the other
keywords will result in a :exc:`ValueError`. If ``relaxed=True``,
and the error can be corrected, a :exc:`~passlib.exc.PasslibHashWarning`
will be issued instead. Correctable errors include
``salt`` strings that are too long.
.. versionadded:: 1.6
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