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Current File : /lib/python3/dist-packages/passlib/utils/__pycache__/pbkdf2.cpython-314.pyc
+
�THi���a�Rt0tRt^RIHt^RIHt^RIHtHtH	t	^RIH
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ltR#)z�passlib.pbkdf2 - PBKDF2 support

this module is getting increasingly poorly named.
maybe rename to "kdf" since it's getting more key derivation functions added.
)�Mapping)�warn)�compile_hmac�lookup_hash�pbkdf2_hmac)�pbkdf1)�ExpectedTypeErrorz�the module 'passlib.utils.pbkdf2' is deprecated as of Passlib 1.7, and will be removed in Passlib 2.0, please use 'passlib.crypto' insteadc�a�V\9d\V,#\V\4'deVP\4'g\RV:24h\
VR,4PoV3RlpWPP3pM4\V4'd\V!RR44pW3pM
\VRR4hV\V&V#)a�Lookup pseudo-random family (PRF) by name.

:arg name:
    This must be the name of a recognized prf.
    Currently this only recognizes names with the format
    :samp:`hmac-{digest}`, where :samp:`{digest}`
    is the name of a hash function such as
    ``md5``, ``sha256``, etc.

    todo: restore text about callables.

:raises ValueError: if the name is not known
:raises TypeError: if the name is not a callable or string

:returns:
    a tuple of :samp:`({prf_func}, {digest_size})`, where:

    * :samp:`{prf_func}` is a function implementing
      the specified PRF, and has the signature
      ``prf_func(secret, message) -> digest``.

    * :samp:`{digest_size}` is an integer indicating
      the number of bytes the function returns.

Usage example::

    >>> from passlib.utils.pbkdf2 import get_prf
    >>> hmac_sha256, dsize = get_prf("hmac-sha256")
    >>> hmac_sha256
    <function hmac_sha256 at 0x1e37c80>
    >>> dsize
    32
    >>> digest = hmac_sha256('password', 'message')

.. deprecated:: 1.7

    This function is deprecated, and will be removed in Passlib 2.0.
    This only related replacement is :func:`passlib.crypto.digest.compile_hmac`.
zunknown prf algorithm: ��NNc�(<�\SV4!V4#)N)r)�key�msg�digests&&��6/usr/lib/python3/dist-packages/passlib/utils/pbkdf2.py�hmac�get_prf.<locals>.hmacZs������,�S�1�1��x�yzstr or callablezprf name)
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:arg secret: passphrase to use to generate key
:arg salt: salt string to use when generating key
:param rounds: number of rounds to use to generate key
:arg keylen: number of bytes to generate (if ``None``, uses digest's native size)
:param hash:
    hash function to use. must be name of a hash recognized by hashlib.

:returns:
    raw bytes of generated key

.. note::

    This algorithm has been deprecated, new code should use PBKDF2.
    Among other limitations, ``keylen`` cannot be larger
    than the digest size of the specified hash.

.. deprecated:: 1.7

    This has been relocated to :func:`passlib.crypto.digest.pbkdf1`,
    and this version will be removed in Passlib 2.0.
    *Note the call signature has changed.*
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WPWV4#)a�pkcs#5 password-based key derivation v2.0

:arg secret:
    passphrase to use to generate key

:arg salt:
    salt string to use when generating key

:param rounds:
    number of rounds to use to generate key

:arg keylen:
    number of bytes to generate.
    if set to ``None``, will use digest size of selected prf.

:param prf:
    psuedo-random family to use for key strengthening.
    this must be a string starting with ``"hmac-"``, followed by the name of a known digest.
    this defaults to ``"hmac-sha1"`` (the only prf explicitly listed in
    the PBKDF2 specification)

    .. rst-class:: warning

    .. versionchanged 1.7:

        This argument no longer supports arbitrary PRF callables --
        These were rarely / never used, and created too many unwanted codepaths.

:returns:
    raw bytes of generated key

.. deprecated:: 1.7

    This has been deprecated in favor of :func:`passlib.crypto.digest.pbkdf2_hmac`,
    and will be removed in Passlib 2.0.  *Note the call signature has changed.*
z1non-HMAC prfs are not supported as of Passlib 1.7r
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�.�$��:�z7�8(=r

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