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Viewing File: /usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyo

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аЖnXc@└sЫdZddlmZmZddlmZddlmZddlZddl	Z	ddl
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ГZ/e%dГZ0e%dГZ1e%dГZ2dZ3dZ4dДZ5de,j6e,j7e,j8e,j9e,j:e,j;fdДГYZ<de<fdДГYZ=de<fdДГYZ>de<fdДГYZ?de<fdДГYZ@de<fdДГYZAd e<fd!ДГYZBde=e<fd"ДГYZCe%d#ГZDd$eCfd%ДГYZEd&eEfd'ДГYZFdS((sрpasslib.bcrypt -- implementation of OpenBSD's BCrypt algorithm.

TODO:

* support 2x and altered-2a hashes?
  http://www.openwall.com/lists/oss-security/2011/06/27/9

* deal with lack of PY3-compatibile c-ext implementation
i(twith_statementtabsolute_import(t	b64encode(tsha256N(twarn(tPasslibHashWarningtPasslibSecurityWarningtPasslibSecurityError(t
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str_to_uasciitbcrypts$2$s$2a$s$2x$s$2y$s$2b$ts<$2a$04$5BJqKfqMQvV7nS.yUguNcueVirQqDBGaLXSqj.rs.pZPlNR0UX/HKcC└sRyddl}Wntk
r$dSXyddlm}Wntk
rMtSXtS(s!
    internal helper which tries to distinguish pybcrypt vs bcrypt.

    :returns:
        True if cext-based py-bcrypt,
        False if ffi-based bcrypt,
        None if 'bcrypt' module not found.

    .. versionchanged:: 1.6.3

        Now assuming bcrypt installed, unless py-bcrypt explicitly detected.
        Previous releases assumed py-bcrypt by default.

        Making this change since py-bcrypt is (apparently) unmaintained and static,
        whereas bcrypt is being actively maintained, and it's internal structure may shift.
    iN(t__version__(RtImportErrortNonetbcrypt._bcryptRtFalsetTrue(RR((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt_detect_pybcrypt4s

t
_BcryptCommoncB└sleZdZdZdZdZejZe	Z
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ee	fZieedГ6eedГ6eed	Г6e	ed
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ZdZdZdZeZeZeZeZeZeZ e!dДГZ"dДZ#dДZ$e!dДГZ%e!dДГZ&e!dДГZ'e!dДГZ(edДZ)dZ*e!dДГZ+dДZ,e!edДГZ-RS(s&
    Base class which implements brunt of BCrypt code.
    This is then subclassed by the various backends,
    to override w/ backend-specific methods.

    When a backend is loaded, the bases of the 'bcrypt' class proper
    are modified to prepend the correct backend-specific subclass.
    Rtsalttroundstidentttruncate_errorit2t2at2yt2biiitlog2iHc	
C└s┬|j|Г\}}|tkr0tdГВn|jtdГГ\}}t|Г}|tdГ|fkrИtjj|dГВn|d |d}}|d|d|d|p╕dd	|ГS(
Ns>crypt_blowfish's buggy '2x' hashes are not currently supportedt$s%02dsmalformed cost fieldiR RtchecksumR!(
t_parse_identtIDENT_2Xt
ValueErrortsplitRtinttuhtexctMalformedHashErrorR(	tclsthashR!ttailt
rounds_strtdataR Rtchk((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytfrom_stringаscC└s2tdГ|j|j|j|jf}t|ГS(Ns%s%02d$%s%s(RR!R RR)R(tselfR3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt	to_string▓s(cC└s)tdГ||j|jf}t|ГS(s5internal helper to prepare config string for backendss	%s%02d$%s(RR RR(R9R!tconfig((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt_get_config╕scK└sdt|tГr!|jdГ}n|jtГrK|dtjdkrKtStt	|Гj
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startswithtIDENT_2ARt	_padinfo2RtsuperRtneeds_update(R2R3tkwds((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRE┴s
&cC└s*|j|Гr"|j|ГjГS|SdS(s<helper to normalize hash, correcting any bcrypt padding bitsN(tidentifyR8R:(R2R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytnormhash╥scC└s"tt|ГjГ}tj|ГS(N(RDRt_generate_saltRt
repair_unused(R2R((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRI┌scK└sJtt|Гj||Н}tj|Г\}}|rFtdtГn|S(NsЧencountered a bcrypt salt with incorrectly set padding bits; you may want to use bcrypt.normhash() to fix this; this will be an error under Passlib 2.0(RDRt
_norm_saltRtcheck_repair_unusedRR(R2RRFtchanged((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRKсs
cC└sMtt|Гj|d|Г}tj|Г\}}|rItdtГn|S(NtrelaxedsЧencountered a bcrypt hash with incorrectly set padding bits; you may want to use bcrypt.normhash() to fix this; this will be an error under Passlib 2.0(RDRt_norm_checksumRRLRR(R9R)RNRM((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyROЁs
s9 -- recommend you install one (e.g. 'pip install bcrypt')c
└s^|jr
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jdИГn|dtГ}|std	ИГВnX|tkr#td
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jdИГn|tГ|tГtjddГ}	|d|	Г}|stdИГВnE|tkr4t|_t
jdИГnt|_|tГ|tГt|_tS(s╪
        helper called by from backend mixin classes' _load_backend_mixin() --
        invoked after backend imports have been loaded, and performs
        feature detection & testing common to all backends.
        c└sYyИ||ГSWnAИk
r%tStk
rT}tjdИ||dtГtSXdS(s8verify() wrapper which traps 'unknown identifier' errorss<trapped unexpected response from %r backend: verify(%r, %r):texc_infoN(tNotImplementedtAssertionErrortlogtdebugR(tsecretR3terr(tbackendt	err_typestverify(s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytsafe_verify"s
	c└szd}|jdГd}И||Гr;tdИГВn|jdГd}И||ГsvtdИ|fГВndS(s
            helper to check for cryptblowfish 8bit bug (fixed in 2y/2b);
            even though it's not known to be present in any of passlib's backends.
            this is treated as FATAL, because it can easily result in seriously malformed hashes,
            and we can't correct for it ourselves.

            test cases from <http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/glibc/crypt_blowfish/wrapper.c.diff?r1=1.9;r2=1.10>
            reference hash is the incorrectly generated $2x$ hash taken from above url
            sгR=s805$/OK.fbVrR/bpIqNJ5ianF.CE5elHaaO4EbggVDjb8P19RukzXSM3es░passlib.hash.bcrypt: Your installation of the %r backend is vulnerable to the crypt_blowfish 8-bit bug (CVE-2011-2483), and should be upgraded or replaced with another backend.s805$/OK.fbVrR/bpIqNJ5ianF.Sa7shbm4.OzKpvFnX1pQLmQW96oUlCqs(%s backend failed to verify %s 8bit hashN(tencodeRtRuntimeError(R!RUtbug_hashtcorrect_hash(RWRY(s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytassert_lacks_8bit_bug4s

c└ssddd }|jdГd}И||Гr4tS|jdГd}И||ГsotdИ|fГВntS(s>
            check for bsd wraparound bug (fixed in 2b)
            this is treated as a warning, because it's rare in the field,
            and pybcrypt (as of 2015-7-21) is unpatched, but some people may be stuck with it.

            test cases from <http://www.openwall.com/lists/oss-security/2012/01/02/4>

            NOTE: reference hash is of password "0"*72

            NOTE: if in future we need to deliberately create hashes which have this bug,
                  can use something like 'hashpw(repeat_string(secret[:((1+secret) % 256) or 1]), 72)'
            t
0123456789ii R=s804$R1lJ2gkNaoPGdafE.H.16.nVyh2niHsGJhayOHLMiXlI45o8/DU.6s804$R1lJ2gkNaoPGdafE.H.16.1MKHPvmKwryeulRe225LKProWYwt9Ois.%s backend failed to verify %s wraparound hash(R[RR\R(R!RUR]R^(RWRY(s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytdetect_wrap_bugOsc└s*И|ГsdStdИ|fГВdS(Ns1%s backend unexpectedly has wraparound bug for %s(R\(R!(RWRa(s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pytassert_lacks_wrap_bugjss;$2$04$5BJqKfqMQvV7nS.yUguNcuRfMMOXK0xPWavM7pOzjEi5ze5T1k8/Sttests %s incorrectly rejected $2$ hashs1%r backend lacks $2$ support, enabling workarounds!%s incorrectly rejected $2a$ hashs %s lacks support for $2a$ hashess╕passlib.hash.bcrypt: Your installation of the %r backend is vulnerable to the bsd wraparound bug, and should be upgraded or replaced with another backend (enabling workaround for now).R$R%s!%s incorrectly rejected $2y$ hashs2%r backend lacks $2y$ support, enabling workaroundR&s!%s incorrectly rejected $2b$ hashs2%r backend lacks $2b$ support, enabling workaround(t_workrounds_initializedRRYR,t	_bcryptortenginet	SaltErrorR\RQt_lacks_20_supportRSRTtTEST_HASH_2ARBRR/R0Rt_has_2a_wraparound_bugtreplacet_lacks_2y_supporttIDENT_2Yt_lacks_2b_supporttIDENT_2Bt_fallback_ident(
t	mixin_clsRWtdryrunRZR_Rbttest_hash_20tresultttest_hash_2yttest_hash_2b((RWRaRXRYs;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt_finalize_backend_mixinsb
				

	

			

	cC└s|j||jd|jГS(sВ
        common helper for backends to implement _calc_checksum().
        takes in secret, returns (secret, ident) pair,
        tnew(t_norm_digest_argsR!tuse_defaults(R9RU((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt_prepare_digest_args╜scC└sUt|tГr!|jdГ}ntj|Г|rD|j|Гnt|kretjj|ГВn|j	rНt
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rK|j}qKnЛ|tkrф|jrK|j}qKng|tkr |jrK|rt|dГ}n|j}qKn+|tkr;tdГВntd|ГВ||fS(Nsutf-8i iHs.$2x$ hashes not currently supported by passlibsunexpected ident value: %r(R>RR[R/tvalidate_secrett_check_truncate_policyt_BNULLR0tNullPasswordErrorRjtlenRBRoRnRpRmRltIDENT_2RhR	R+R\RR(R2RUR!Rx((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRy─s4

			(ssaltsroundssidentR"(.t__name__t
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truncate_sizeRRdRjRhRlRnRptclassmethodR8R:R<RERHRIRKROt_no_backend_suggestionRwR{Ry(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRYsF		*
				▒	t
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    mixin used before any backend has been loaded.
    contains stubs that force loading of one of the available backends.
    cC└s |jГtt|Гj|ГS(N(t_stub_requires_backendRDRt_calc_checksum(R9RU((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЩs
(RВRГRДRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЧ	st_BcryptBackendcB└s&eZdZedДГZdДZRS(s-
    backend which uses 'bcrypt' package
    cC└sЕtГr
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d|Г|j||ГS(Nis&(trapped) error reading bcrypt versionRPs	<unknown>s%detected 'bcrypt' backend, version %r(RRRt_bcryptRt	__about__RRStwarningRRTRw(RqRЕRrtversion((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt_load_backend_mixin#s	

cC└sh|j|Г\}}|j|Г}t|tГrE|jdГ}ntj||Г}|djdГS(NR=iс   (R{R<R>RR[RЫthashpwR@(R9RUR!R;R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЩIs(RВRГRДRХRЯRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЪs&t_BcryptorBackendcB└s&eZdZedДГZdДZRS(s/
    backend which uses 'bcryptor' package
    cC└s5yddlaWntk
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cC└sP|j|Г\}}|j|Г}tjjtГj||Г}t|dГS(Niс   (R{R<ReRftEngineRthash_keyR(R9RUR!R;R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЩjs(RВRГRДRХRЯRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRб[s
t_PyBcryptBackendcB└s;eZdZdZedДГZdДZdДZeZ	RS(s/
    backend which uses 'pybcrypt' package
    cC└s∙tГs
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r1tSXytjj}Wn tjddt	Гd}nXtj
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Nis((trapped) error reading pybcrypt versionRPs	<unknown>s'detected 'pybcrypt' backend, version %risapy-bcrypt %s has a major security vulnerability, you should upgrade to py-bcrypt 0.3 immediately.(ii(ii(RRRt	_pybcryptRRЫRRSRЭRRTRRR/R0Rt
_calc_lockRt	threadingtLockt_calc_checksum_threadsafet__func__RЩRw(RqRЕRrRЮtvinfoRи((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЯАs*	

cC└s!|jП|j|ГSWdQXdS(N(Rзt_calc_checksum_raw(R9RU((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRкбs
cC└sD|j|Г\}}|j|Г}tj||Г}t|dГS(Niс   (R{R<RжRаR(R9RUR!R;R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRниsN(
RВRГRДRRзRХRЯRкRнRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRеxs!		t_OsCryptBackendcB└s&eZdZedДГZdДZRS(s0
    backend which uses :func:`crypt.crypt`
    cC└s#tdtГstS|j||ГS(NRc(RRiRRw(RqRЕRr((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЯ╛scC└sW|j|Г\}}|j|Г}t||Г}|rA|dStjjdГВdS(Niс   ssnon-utf8 encoded passwords can't be handled by crypt.crypt() under python3, recommend running `pip install bcrypt`.(R{R<RR/R0tMissingBackendError(R9RUR!R;R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЩ─s
	(RВRГRДRХRЯRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRо╣st_BuiltinBackendcB└s&eZdZedДГZdДZRS(sA
    backend which uses passlib's pure-python implementation
    cC└sYddlm}|tjjdГГs9tjdГtSddlm	a
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passlib.utilsR▒tostenvirontgetRSRTRtpasslib.crypto._blowfishR│t_builtin_bcryptRw(RqRЕRrR▒((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЯрs
cC└sM|j|Г\}}t||dd!|jjdГ|jГ}|jdГS(Nii    R=(R{R╣RR[R R@(R9RUR!R7((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRЩъs(RВRГRДRХRЯRЩ(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyR░▄s
cB└sJeZdZdZeZied6ed6e	d6e
d6ed6ed6Z
RS(s╦
This class implements the BCrypt password hash, and follows the :ref:`password-hash-api`.

    It supports a fixed-length salt, and a variable number of rounds.

    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 22 characters, drawn from the regexp range ``[./0-9A-Za-z]``.

    :type rounds: int
    :param rounds:
        Optional number of rounds to use.
        Defaults to 12, must be between 4 and 31, inclusive.
        This value is logarithmic, the actual number of iterations used will be :samp:`2**{rounds}`
        -- increasing the rounds by +1 will double the amount of time taken.

    :type ident: str
    :param ident:
        Specifies which version of the BCrypt algorithm will be used when creating a new hash.
        Typically this option is not needed, as the default (``"2b"``) is usually the correct choice.
        If specified, it must be one of the following:

        * ``"2"`` - the first revision of BCrypt, which suffers from a minor security flaw and is generally not used anymore.
        * ``"2a"`` - some implementations suffered from rare security flaws, replaced by 2b.
        * ``"2y"`` - format specific to the *crypt_blowfish* BCrypt implementation,
          identical to ``"2b"`` in all but name.
        * ``"2b"`` - latest revision of the official BCrypt algorithm, current default.

    :param bool truncate_error:
        By default, BCrypt will silently truncate passwords larger than 72 bytes.
        Setting ``truncate_error=True`` will cause :meth:`~passlib.ifc.PasswordHash.hash`
        to raise a :exc:`~passlib.exc.PasswordTruncateError` instead.

        .. versionadded:: 1.7

    :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 ``rounds``
        that are too small or too large, and ``salt`` strings that are too long.

        .. versionadded:: 1.6

    .. versionchanged:: 1.6
        This class now supports ``"2y"`` hashes, and recognizes
        (but does not support) the broken ``"2x"`` hashes.
        (see the :ref:`crypt_blowfish bug <crypt-blowfish-bug>`
        for details).

    .. versionchanged:: 1.6
        Added a pure-python backend.

    .. versionchanged:: 1.6.3

        Added support for ``"2b"`` variant.

    .. versionchanged:: 1.7

        Now defaults to ``"2b"`` variant.
    RtpybcryptRвtos_crypttbuiltin(sbcryptR║sbcryptorR╗R╝N(RВRГRДtbackendsRt_backend_mixin_targetRЧRRЪRеRбRоR░t_backend_mixin_map(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRєsAR(t_wrapped_bcryptcB└s<eZdZedДejDГГZdZedДГZ	RS(s├
    abstracts out some bits bcrypt_sha256 & django_bcrypt_sha256 share.
    - bypass backend-loading wrappers for hash() etc
    - disable truncation support, sha256 wrappers don't need it.
    cc└s!|]}|dkr|VqdS(R"N(struncate_error((t.0telem((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pys	<genexpr>_scC└sdS(N((R2RU((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyR}ssN(
RВRГRДttupleRRЖRRФRХR}(((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyR└Yst
bcrypt_sha256cB└sТeZdZdZeefZdДeГZeZe	dГZ
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ГZedДГZedДГZe	dГZdДZd	ДZRS(
s─This class implements a composition of BCrypt+SHA256, and follows the :ref:`password-hash-api`.

    It supports a fixed-length salt, and a variable number of rounds.

    The :meth:`~passlib.ifc.PasswordHash.hash` and :meth:`~passlib.ifc.PasswordHash.genconfig` methods accept
    all the same optional keywords as the base :class:`bcrypt` hash.

    .. versionadded:: 1.6.2

    .. versionchanged:: 1.7

        Now defaults to ``"2b"`` variant.
    R─c└s#tЗfdЖtjjГDГГS(Nc3└s%|]}|dИkr|VqdS(iN((R┴titem(RЛ(s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pys	<genexpr>Ъs(tdictRRМtitems(RЛ((RЛs;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyt<lambda>Ъss$bcrypt-sha256$s▒
        ^
        [$]bcrypt-sha256
        [$](?P<variant>2[ab])
        ,(?P<rounds>\d{1,2})
        [$](?P<salt>[^$]{22})
        (?:[$](?P<digest>.{31}))?
        $
        cC└s)tj|Г}|stS|j|jГS(N(R/tto_unicode_for_identifyRRAtprefix(R2R3((s;/usr/lib/python2.7/site-packages/passlib/handlers/bcrypt.pyRG╗scC└sыt|ddГ}|j|jГs9tjj|ГВn|jj|Г}|sftjj|ГВn|j	dГ}|jtj
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