Current File : //lib/python2.7/site-packages/passlib/utils/pbkdf2.pyo
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dddddedd�e�ZiadZd�Zddd�Zddd�ZdS(s�passlib.pbkdf2 - PBKDF2 support

this module is getting increasingly poorly named.
maybe rename to "kdf" since it's getting more key derivation functions added.
i����(tdivisionN(tExpectedTypeError(tdeprecated_function(tnative_string_types(tnorm_hash_nametlookup_hashtpbkdf1tpbkdf2_hmactcompile_hmacRtget_prfRtpbkdf2(twarns�the module 'passlib.utils.pbkdf2' is deprecated as of Passlib 1.7, and will be removed in Passlib 2.0, please use 'passlib.crypto' insteadt
deprecateds1.7tremoveds1.8tfunc_moduletreplacements$passlib.crypto.digest.norm_hash_namethmac_shmac-c s�|tkrt|St|t�r|jt�sHtd|f��nt|d�j��fd�}||jj	f}nBt
|�r�t|dd��}||f}nt|dd��|t|<|S(sLookup 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`.
    sunknown prf algorithm: %ric st�|�|�S(N(R(tkeytmsg(tdigest(s8/usr/lib/python2.7/site-packages/passlib/utils/pbkdf2.pythmachstxtysstr or callablesprf name(
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startswitht_HMAC_PREFIXESt
ValueErrorRtnametdigest_infotdigest_sizetcallabletlenR(RRtrecordR((Rs8/usr/lib/python2.7/site-packages/passlib/utils/pbkdf2.pyR	9s)
tsha1cC st|||||�S(sLpkcs#5 password-based key derivation v1.5

    :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.*
    (t_pbkdf1(tsecrettsalttroundstkeylenthash((s8/usr/lib/python2.7/site-packages/passlib/utils/pbkdf2.pyRwss	hmac-sha1cC sZt|�s+t|t�r:|jt�r:td��n|d}t|||||�S(sWpkcs#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.*
    s1non-HMAC prfs are not supported as of Passlib 1.7i(RRRRRtNotImplementedErrorR(R$R%R&R'tprfR((s8/usr/lib/python2.7/site-packages/passlib/utils/pbkdf2.pyR
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(Rshmac-(t__doc__t
__future__Rtloggingt	getLoggert__name__tlogtpasslib.excRtpasslib.utils.decorRtpasslib.utils.compatRtpasslib.crypto.digestRRRR#RRt__all__twarningsRtDeprecationWarningRRR	tNoneR
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