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Code Editor : binary.pyo
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(must be 255-length byte string). defaults to identity mapping. :returns: 255-length byte string for passing to bytes().translate. t asciiN( t Nonet _TRANSLATE_SOURCEt listR t itemst isinstanceR t ordR t encodet B_EMPTYt join( t mappingt sourcet targett kt v( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR! n s c C` s t | � j t � S( sr encode using shortened base64 format which omits padding & whitespace. uses default ``+/`` altchars. ( R t rstript _BASE64_STRIP( t data( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR$ � s c C` s� t | t � rK y | j d � } WqK t k rG t t d � � � qK Xn t | � d @} | d k rj n> | d k r� | t 7} n% | d k r� | t 7} n t d � � y t | � SWn% t k r� } t t | � � � n Xd S( sq decode from shortened base64 format which omits padding & whitespace. uses default ``+/`` altchars. R1 s4 string argument should contain only ASCII charactersi i i s invalid base64 inputN( R6 R R8 t UnicodeEncodeErrorR t ValueErrort lent _BASE64_PAD2t _BASE64_PAD1R t _BinAsciiErrort TypeError( RB t offt err( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR% � s" s = s ==c C` s t | � j d d � S( s� encode using shortened base64 format which omits padding & whitespace. uses custom ``./`` altchars. it is primarily used by Passlib's custom pbkdf2 hashes. t +t .( R$ t replace( RB ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR" � s c C` sa t | t � rK y | j d � } WqK t k rG t t d � � � qK Xn t | j d d � � S( s� decode from shortened base64 format which omits padding & whitespace. uses custom ``./`` altchars, but supports decoding normal ``+/`` altchars as well. it is primarily used by Passlib's custom pbkdf2 hashes. R1 s4 string argument should contain only ASCII charactersRM RL ( R6 R R8 RC R RD R% RN ( RB ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR# � s c C` s t t | � j t � � S( sh wrapper around :func:`base64.b32encode` which strips padding, and returns a native string. ( R t _b32encodeR@ t B_EQUAL( R< ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR � s t Bt 8t Ot 0i c C` se t | t � r! | j d � } n | j t � } t | � d @} | rX | t | 7} n t | t � S( s� wrapper around :func:`base64.b32decode` which handles common mistyped chars. padding optional, ignored if present. R1 i ( R6 R R8 t translatet _b32_translateRE t _b32_decode_padt _b32decodet True( R< t remainder( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR � s c B` s: e Z d Z d Z d Z d Z d Z d Z d Z e d � Z e d � � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e d � � Z e d � � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z! d � Z" d � Z# d � Z$ d � Z% d � Z& d � Z' RS( sc Provides routines for encoding/decoding base64 data using arbitrary character mappings, selectable endianness, etc. :arg charmap: A string of 64 unique characters, which will be used to encode successive 6-bit chunks of data. A character's position within the string should correspond to its 6-bit value. :param big: Whether the encoding should be big-endian (default False). .. note:: This class does not currently handle base64's padding characters in any way what so ever. Raw Bytes <-> Encoded Bytes =========================== The following methods convert between raw bytes, and strings encoded using the engine's specific base64 variant: .. automethod:: encode_bytes .. automethod:: decode_bytes .. automethod:: encode_transposed_bytes .. automethod:: decode_transposed_bytes .. .. automethod:: check_repair_unused .. automethod:: repair_unused Integers <-> Encoded Bytes ========================== The following methods allow encoding and decoding unsigned integers to and from the engine's specific base64 variant. Endianess is determined by the engine's ``big`` constructor keyword. .. automethod:: encode_int6 .. automethod:: decode_int6 .. automethod:: encode_int12 .. automethod:: decode_int12 .. automethod:: encode_int24 .. automethod:: decode_int24 .. automethod:: encode_int64 .. automethod:: decode_int64 Informational Attributes ======================== .. attribute:: charmap unicode string containing list of characters used in encoding; position in string matches 6bit value of character. .. attribute:: bytemap bytes version of :attr:`charmap` .. attribute:: big boolean flag indicating this using big-endian encoding. c C` s t | t � r! | j d � } n$ t | t � sE t j | d � � n t | � d k rf t d � � n t t | � � d k r� t d � � n | | _ | j | _ t d � t | � D� � } | j | _ | | _ | r� | j | _ | j | _ n | j | _ | j | _ d S( Ns latin-1t charmapi@ s' charmap must be 64 characters in lengths- charmap must not contain duplicate charactersc s` s! | ] \ } } | | f Vq d S( N( ( t .0t idxt value( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>] s ( R6 R R8 t bytesR t ExpectedStringErrorRE RD t sett bytemapt __getitem__t _encode64t dictt enumeratet _decode64t bigt _encode_bytes_bigt _encode_bytest _decode_bytes_bigt _decode_bytest _encode_bytes_littlet _decode_bytes_little( t selfR[ Rh t lookup( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt __init__Q s$ c C` s | j j d � S( s charmap as unicodes latin-1( Rb t decode( Ro ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR[ s s c C` s� t | t � s+ t d t | � f � � n t t | � d � \ } } t ra t t | � � } n t d � | D� � } | j | | | � } t t | j | � � } | S( s� encode bytes to base64 string. :arg source: byte string to encode. :returns: byte string containing encoded data. s source must be bytes, not %si c s` s | ] } t | � Vq d S( N( R7 ( R\ t elem( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>� s ( R6 R_ RI t typet divmodRE R R t iterRj R R Rd ( Ro R< t chunkst tailt next_valuet gent out( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_bytes{ s c c` s� d } xq | | k ry | � } | � } | � } | d @V| d @d >| d ?BV| d @d >| d ?BV| d ?V| d 7} q W| r� | � } | d k r� | d @V| d ?Vq� | � } | d @V| d @d >| d ?BV| d ?Vn d S( s> helper used by encode_bytes() to handle little-endian encodingi i? i i i i i i N( ( Ro Ry Rw Rx R] t v1t v2t v3( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyRm � s& c c` s� d } xq | | k ry | � } | � } | � } | d ?V| d @d >| d ?BV| d @d >| d ?BV| d @V| d 7} q W| r� | � } | d k r� | d ?V| d @d >Vq� | � } | d ?V| d @d >| d ?BV| d @d >Vn d S( s; helper used by encode_bytes() to handle big-endian encodingi i i i i i i? i N( ( Ro Ry Rw Rx R] R} R~ R ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyRi � s& c C` s� t | t � s+ t d t | � f � � n t t | � d � \ } } | d k ra t d � � n t t | j | � � } y t | j | | | � � SWn- t k r� } t d | j d f � � n Xd S( s� decode bytes from base64 string. :arg source: byte string to decode. :returns: byte string containing decoded data. s source must be bytes, not %si i s( input string length cannot be == 1 mod 4s invalid character: %ri N( R6 R_ RI Rt Ru RE RD R R Rg R Rl t KeyErrort args( Ro R< Rw Rx Ry RK ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_bytes� s c c` s� d } xu | | k r} | � } | � } | � } | � } | | d @d >BV| d ?| d @d >BV| d ?| d >BV| d 7} q W| r� | � } | � } | | d @d >BV| d k r� | � } | d ?| d @d >BVq� n d S( s> helper used by decode_bytes() to handle little-endian encodingi i i i i i i N( ( Ro Ry Rw Rx R] R} R~ R t v4( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyRn � s" c c` s� d } xu | | k r} | � } | � } | � } | � } | d >| d ?BV| d @d >| d ?BV| d @d >| BV| d 7} q W| r� | � } | � } | d >| d ?BV| d k r� | � } | d @d >| d ?BVq� n d S( s; helper used by decode_bytes() to handle big-endian encodingi i i i i i i N( ( Ro Ry Rw Rx R] R} R~ R R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyRk s" c ` sU t � f d � t | j � D� � } | j � f d � t | j � D� � t | � S( s2 helper to generate set of valid last chars & bytesc 3` s% | ] \ } } | � @s | Vq d S( N( ( R\ t it c( t bits( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>G s c 3` s% | ] \ } } | � @s | Vq d S( N( ( R\ R� R� ( R� ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>H s ( Ra Rf Rb t updateR[ t frozenset( Ro R� t pset( ( R� s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt __make_padsetE s %&c C` s) | j r d n d } | | j | � f S( sD mask to clear padding bits, and valid last bytes (for strings 2 % 4)i i i< ( Rh t _Base64Engine__make_padset( Ro R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt _padinfo2K s c C` s) | j r d n d } | | j | � f S( sD mask to clear padding bits, and valid last bytes (for strings 3 % 4)i i i0 ( Rh R� ( Ro R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt _padinfo3R s c C` s t | � d @} | d k r. | j \ } } n: | d k rL | j \ } } n | s\ t | f St d � � | d } | | k r� t | f St | t � r� | j } | | j | � | @} n4 | j | j | � | @� } t r� t | g � } n t | d | f S( s helper to detect & clear invalid unused bits in last character. :arg source: encoded data (as ascii bytes or unicode). :returns: `(True, result)` if the string was repaired, `(False, source)` if the string was ok as-is. i i s source length must != 1 mod 4i����( RE R� R� t FalseRD R6 R R[ t indexRd Rg R R_ RY ( Ro R< Rx t maskt padsett lastt cm( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt check_repair_unusedY s& c C` s | j | � d S( Ni ( R� ( Ro R< ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt repair_unused� s c ` sT t � t � s+ t d t � � f � � n t � f d � | D� � } | j | � S( s> encode byte string, first transposing source using offset lists source must be bytes, not %sc 3` s | ] } � | Vq d S( N( ( R\ RJ ( R< ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>� s ( R6 R_ RI Rt R R| ( Ro R< t offsetst tmp( ( R< s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_transposed_bytes� s c C` sV | j | � } d g t | � } x' t | | � D] \ } } | | | <q2 Wt | � S( sG decode byte string, then reverse transposition described by offset listN( R� R2 RE t zipR ( Ro R< R� R� t bufRJ t char( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_transposed_bytes� s c C` s t | t � s+ t d t | � f � � n | j } | d } | | d } t | � | k ru t d | f � � n | j } d } y; x4 | r� | n t | � D] } | d >| | � } q� WWn$ t k r� t d | f � � n X| r| r� | | L} q| d | >d M} n | S( s� decode base64 string -> integer :arg source: base64 string to decode. :arg bits: number of bits in resulting integer. :raises ValueError: * if the string contains invalid base64 characters. * if the string is not long enough - it must be at least ``int(ceil(bits/6))`` in length. :returns: a integer in the range ``0 <= n < 2**bits`` s source must be bytes, not %si s source must be %d charsi s invalid character in string: %ri ( R6 R_ RI Rt Rh RE RD Rg t reversedR� ( Ro R< R� Rh t padt charsRr R{ R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt _decode_int� s& c C` s� t | t � s+ t d t | � f � � n t | � d k rL t d � � n t r_ | d } n y | j | � SWn t k r� t d � � n Xd S( s( decode single character -> 6 bit integers source must be bytes, not %si s source must be exactly 1 bytei s invalid characterN( R6 R_ RI Rt RE RD R Rg R� ( Ro R< ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_int6� s c C` s� t | t � s+ t d t | � f � � n t | � d k rL t d � � n | j } yM | j r� | | d � | | d � d >S| | d � | | d � d >SWn t k r� t d � � n Xd S( s' decodes 2 char string -> 12-bit integers source must be bytes, not %si s source must be exactly 2 bytesi i i s invalid characterN( R6 R_ RI Rt RE RD Rg Rh R� ( Ro R< Rr ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_int12� s $ c C` s t | t � s+ t d t | � f � � n t | � d k rL t d � � n | j } y� | j r� | | d � | | d � d >| | d � d >| | d � d >S| | d � | | d � d >| | d � d >| | d � d >SWn t k r t d � � n Xd S( s' decodes 4 char string -> 24-bit integers source must be bytes, not %si s source must be exactly 4 bytesi i i i i i i s invalid characterN( R6 R_ RI Rt RE RD Rg Rh R� ( Ro R< Rr ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_int24� s DH c C` s | j | d � S( s& decode 5 char string -> 30 bit integeri ( R� ( Ro R< ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_int30� s c C` s | j | d � S( s� decode 11 char base64 string -> 64-bit integer this format is used primarily by des-crypt & variants to encode the DES output value used as a checksum. i@ ( R� ( Ro R< ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt decode_int64 s c ` sy | d } | | 7} | j rA t | d d d � } � | K� n t d | d � } t t | j � f d � | D� � � S( s� encode integer into base64 format :arg value: non-negative integer to encode :arg bits: number of bits to encode :returns: a string of length ``int(ceil(bits/6.0))``. i i����i c 3` s | ] } � | ?d @Vq d S( i? N( ( R\ RJ ( R^ ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pys <genexpr>" s ( Rh R R R Rd ( Ro R^ R� R� t itr( ( R^ s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt _encode_int s c C` sP | d k s | d k r' t d � � n t r? | j | | d !S| j | � Sd S( s0 encodes 6-bit integer -> single hash64 characteri i? s value out of rangei N( RD R Rb Rd ( Ro R^ ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_int6( s c C` sm | d k s | d k r' t d � � n | d @| d ?d @g } | j rW t | � } n t t | j | � � S( s' encodes 12-bit integer -> 2 char stringi i� s value out of rangei? i ( RD Rh R� R R Rd ( Ro R^ t raw( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_int121 s c C` s� | d k s | d k r' t d � � n | d @| d ?d @| d ?d @| d ?d @g } | j rm t | � } n t t | j | � � S( s' encodes 24-bit integer -> 4 char stringi i��� s value out of rangei? i i i ( RD Rh R� R R Rd ( Ro R^ R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_int24: s c C` s7 | d k s | d k r' t d � � n | j | d � S( s& decode 5 char string -> 30 bit integeri i���?s value out of rangei ( RD R� ( Ro R^ ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_int30D s c C` s7 | d k s | d k r' t d � � n | j | d � S( s� encode 64-bit integer -> 11 char hash64 string this format is used primarily by des-crypt & variants to encode the DES output value used as a checksum. i l ���� s value out of rangei@ ( RD R� ( Ro R^ ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt encode_int64J s N(( t __name__t __module__t __doc__R2 Rb Rh Rd Rg Rj Rl R� Rq t propertyR[ R| Rm Ri R� Rn Rk R� R R� R� R� R� R� R� R� R� R� R� R� R� R� R� R� R� R� R� ( ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR& � sD ? " ' + # * ) ( c B` s/ e Z d Z d Z d � Z d � Z d � Z RS( s< Base64Engine which delays initialization until it's accessedc O` s | | f | _ d S( N( t _lazy_opts( Ro R� t kwds( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyRq \ s c C` s; | j \ } } t t | � j | | � | ` t | _ d S( N( R� t superR' Rq R& t __class__( Ro R� R� ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt _lazy_init_ s c C` s, | j d � s | j � n t j | | � S( Nt _( t startswithR� t objectt __getattribute__( Ro t attr( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR� e s N( R� R� R� R2 R� Rq R� R� ( ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyR' X s Rh (G R� t __future__R R R t base64R R R RX R RO t binasciiR R R RH t loggingt getLoggerR� t logt passlibR t passlib.utils.compatR R R R R R R R R R R R t passlib.utils.decorR t __all__R R R R R R R R R R9 t B_NULLRP R4 R3 R2 R! R$ R% RA RG RF R" R# RV RW R� R& R' R( RY R) R* ( ( ( s8 /usr/lib/python2.7/site-packages/passlib/utils/binary.pyt <module> sn " R ! � � ]
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