WwgdZddlZddlZddlZddlZddlmZddlmZddl m Z ddl m Z m Z mZmZmZmZmZddlmZmZddlmZmZdd lmZmZmZdd lmZgd Zej@e!Z"ejFGd d ejHZ%edGddZ&edGddZ'de e'fdZ( d;dejRde*de e'fdZ+ejFGddejHZ,edGddZ-GddZ.edGdd Z/d!e0d"e/d#ee/fd$Z1d%ee/fd&Z2d#ee/fd'Z3Gd(d)Z4Gd*d+ej4Z5d,Z6d-Z7Gd.d/ejpZ9d0Z:d1Z;Gd2d3Zr?fstraileri)rread_non_whitespaceseekosSEEK_CURr NumberObjectread_from_streamrangereadsplitrrr0r9r/) streamnumsizecntlineoffsetr?marker trailertags r4r"r"qs V$ KKBKK ""33F;   ( B $##44V<   ( B $D>% C;;r?Dq'[( GR[[1{{2q'[(Bx>) B ,)-cr)> &FJ~&// [":  4&mm!":  1HCK% L   ( B $[[^  #  $ $V , KKBKK (  KKBKK (o s D>JE J xref_streamstrictc#Kt|j|jdd|jdg}|jdfd}d}tj|D]\}}||k\sJ||z}t |||zD]}|d}|dk(r0|d} |d} t tj|| | @|dk(r;|d} |d} t| | } t tj|| |dk(r0|d|d} t tj|| d |d|dtjddkDrrtjd y y w) aQ Parse a single cross-reference stream and yield its entries one by one. This is internal API. :param xref_stream: A :class:`~generic.StreamObject`. :param strict: Boolean indicating whether we're running in strict mode. :return: A generator object yielding :class:`.XRefEntry` objects. /Indexr/Size/Wc|}|dkDrRj|}t||k\r t||Sr%tjd|dt|d|dk(ryy)NrzBXRef stream ended prematurely; incomplete entry: expected to read z bytes, but only got .rH)rQlenconvert_to_intrr)ix entry_widthd entry_sizes stream_datar\s r4 get_entryz$parse_xref_stream..get_entrys""o ?  -A1v$%a55--((3}4I1vha! 7r3rH)r<r>r=r?)r<r>r=N)r<r>r?r=z'Trailing data in cross-reference stream)rdatagetr pair_iterrPrrr0rr1r/rcrQr)r[r\ idx_pairsrjlast_endstartrUrTr<r=r? objstr_num objstr_idxnext_generationrhris ` @@r4r!r!s +**+K1koog.F*GHI//$'K.H~~i0* t   4< -& C!! IA~$Q<&q\ &//%)  a&q\ &q\ ' J?&44% a! "+A,&mm.! ! ! M&  *X ;  A !#%%&OPP)/#sFF ceZdZejZejZejZejZy)rN) r)r*r+r-r.r0STREAM HYBRID_MAIN HYBRID_STREAMr2r3r4rrs6tyy{H TYY[F$))+KDIIKMr3rcneZdZUeed< eed< eed< eed< eed< eejed<y)rxref_section_typerUdeclared_startxrefstart_location end_location stream_refN) r)r*r+rr:r9r r Referencer2r3r4rrsX&& I **++r3rceZdZdZd dZdeejejfde ee e ffdZ de edefdZde ed edefd Zd Zy )rzn Internal class for bookkeeping on a single cross-reference section, independently of the others. cxi|_i|_i|_t|_t|_d|_yN)freedstandard_xrefsxrefs_in_objstmsetexplicit_refs_in_revisionobj_streams_usedhybridselfs r4__init__zXRefSectionData.__init__Gs6&( :<8:?Bu&*-%-1 r3refr@c|jdk(r |j|jS|jj |jd}|"|d|jk(r|dSt||j j |jd}||j|dz k(ry|j%|jjj|St|#t$rYwxYw)NrrH) r?rr>KeyErrorrrmrr xref_data try_resolve)rrstd_reffreed_next_generations r4rzXRefSectionData.try_resolveQs >>Q  ++CII66%%))#))T:  qzS^^+qz!sm# $ syy$ ? " -"7!";;  ;; ";;((44S9 93- ;  sC++ C76C7entriesr\cRd}|D]}|j}|j}t||}|dkDr|rtd|d|dB|jdk(rR|jt j k(rM|j}t|tsJ||f|j|<|jj||f|jt jk(rx|dk(sJ|j}t|tsJ||j|<|j j|j"|jj|dfQ|jt j$k(sp||j&|<|jj||dz f|S)NrizIllegal generation z for object ID rbrH)r>r?maxrr<rr0r= isinstancer9rraddr1rrrr7r/r) rrr\ highest_id xref_entryr>r?rXlocs r4process_entrieszXRefSectionData.process_entries~s ! LJ$$E#..JUJ/JF",-j\:%%*G1.1$##x'8'88#,,!&#....8&-A##E*..22E:3FG%%)?)??!Q& ))!#|444.1$$U+%%))#*;*;<..22E1:>%%6$. 5!..22E:>3JK; L<r3xref_meta_infoc`t}|j||t|||_y)Nr\)rrrr)rrrr\rs r4process_hybrid_entriesz&XRefSectionData.process_hybrid_entriess- !"wv6!.&9 r3c#nK|jjD]\}\}}|dkDs||fyw)Nr)ritems)rr>r?_s r4higher_generation_refsz&XRefSectionData.higher_generation_refss?&*&9&9&?&?&A ( "E?JA~Z'' (s)5 5N)rr)r)r*r+r,rr r rIndirectObjectr r9rrrrboolrrrrr2r3r4rrAs 2+ **G,B,BBC+ %\)* ++ Z x ': D D:)$:,: :(r3rc(eZdZUdZeed< eed<y)rzg Describes a cross-reference section and describes how it is serialised into the PDF file. meta_inforN)r)r*r+r,rr:rr2r3r4rrs! #"r3rresection all_sectionsc |jj}|rT|j|jf}||dzdD]1}|j}||j vst jd|jjjD]%\}}|dk(r|dkDrt jd|t|dz kr_||dz} | jj | jjjnd} | || jvs|| jvrd} ||dzdD]} | j}||jvrd} n |j|\} }|dk(s| |kr| } | B|dk(rt jd|d| dt jd|d| d |dz d (y#t$rYVwxYw) NrHz9XRef stream objects must not be clobbered in strict mode.rztIn strict mode, a free xref with next generation 0 is onlypermitted in an initial revision due to unclear semantics.Object with id zA was listed as dead, but is reused later, with generation number rbz and generation z was found after z was freed.)rr~r>r?rrrrrrrcrrrr)rerr xstream_refas_tuplesection_rlr>expected_next_generation next_sectionrimproper_generationsuccrtrs r4_check_freed_refsrsK##..K%%{'='=>$R!VX. 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D>>D,,,&'# )-)<)    # # /##** * s;=c 4t|D]\}}t|||tt|}d}t|D]D\}}t |j j }|jj}|jj}||kr/|tjk7rtjd|d|dt||}|jjtjk(}|D]\} } t|d|} |r%t!| } | | j j"vr| D]#} | j j"| } | | k(ra%tjd| d| d| dz dGy#t$$rYXwxYw) NrzEXRef section sizes must be nondecreasing; found XRef section of size z after section of size rbrz( has an orphaned generation: generation z7 was not preceded by a free instruction for generation rH) enumeraterlistrrrrrrUrzrrxrrrreversednextrr)rrerexpanded_sections prev_size higher_genszr<is_hybrid_streamr>r? precedingprecrts r4_check_xref_consistencyr6s !.5 G"g|45]<89I !232 G**AACD    # #%%77 >i?+H+HH ))$5i[C I&     / /?3P3P P ",  E: !23B!78I IDNN000! &*nn&:&:5&AO&*45 --%eW-..8\:"",q.!14' 52T sF  F F cHeZdZdZdededefdZdZdefdZ defd Z d Z y ) r handlerr\last_startxrefc||_||_||_||_g|_t |_tj||j _ d|_ y)NF) rrSr\rrrtrailerr TrailerReference container_refhas_xref_stream)rrrSr\rs r4rzXRefBuilder.__init__zsQ   ,+- (* %,%=%=g%F "$r3c|j}t||j\}}tj|||j }tj j||}||_|jddk(sJ||fS)Nrpdf/Type/XRef) rSr r\r rr StreamObjectrOrraw_get)rrSr>r?xrefstream_ref xrefstreams r4_read_xref_stream_objectz$XRefBuilder._read_xref_stream_objects.vdkkJz **5*$,,O)):: N $2  !!'*g555z))r3r{c|j}|j}|j\}}t}|j t ||j |j ttjt|jd|||j|}|jjt|||jj!||j#dS)Nrr_rzrUr{r|r}r~/Prev)rStellrrrr!r\rrrvr9rrappendrradd_trailer_revisionrm)rr{rSr|rrxref_section_datars r4_read_xref_streamzXRefBuilder._read_xref_streams%)%B%B%D" +-)) j =;; * --44Z''011)%   [9JKL ))*5~~g&&r3c|j}|j}t}|jt ||j }|j}t jj|t j|j}t|t jsJt|jd}|j r$||k\rtjd|d|dz d t|jd} | |j} |j%| |j'\} } t)t*j,t| jd| | |j| } |j/t1| | |j |j%| t*j2}nd} t*j4}t)|||||| }|j6j9t;|||j<j?||jAd S#t t"f$rd} YLwxYw) Nrr_z9Xref table size mismatch: table allocated object with id z, but according to the trailer rHz" is the maximal allowed object id./XRefStmrr)!rSrrrr"r\r DictionaryObjectrOrrrr9rrrr ValueErrorrKrrrrxrr!rwr0rrrrrrm)rr{rS xref_startrhighestxref_end new_trailer declared_sizehybrid_xref_stm_loc stream_posr~rhybrid_stream_metar<rs r4_read_xref_tablezXRefBuilder._read_xref_tables8[[] +-#33 V $T[[4 ;;=..?? G,,T\\: +w'?'?@@@K//89 ;;7m3))K):=1;L:MN45   '"%k&9&9*&E"F   *J KK+ ,%)%B%B%D "J "5"1"?"?++G45#62#[[]% "   4 4!*-"{{ 5  KK #'33IJ'00I,'1%!!   [9JKL ))+6w''W*% '"&  'sII('I(cx|j}|jx}}d}|&|jr|s||jkDr t d|s|}|j |t j|r%tjd|j}|jd}|dk(r6|jd}|dddk7r td |j|}n]|jr:|j d tj  |j#|}d |_nt'||}|dz }#d}|&t+t-|j.}|jr t1||S#t$$r3}tjd | t'||}|dz }Yd}~d}~wwxYw)NrzFailed to locate xref sectionz>Encountered unexpected whitespace when looking for xref streamrHxsrefzxref table read errorrBz;Failed to read xref stream header, attempting to correct...)exc_infoT)rSrr\ err_limitrrKrskip_over_whitespaceloggerdebugrrQrrisdigitrLrMrr_attempt_startxref_correctionrrrrr) rrSr{ startxref err_countxrechrono_sectionss r4 read_xrefszXRefBuilder.read_xrefss)-)<)<<Y # i$...H()HII%." KK "((0 &#KKM  AADykk!nr7f$&'>?? 112DE  B ,  $ 6 67I JI(,$9&)L Q IS#Zx 67 ;; #O 4-- LL%!"! !>fi PINI sE== F9(F44F9N) r)r*r+rrrr9rrrrrr2r3r4rrwsII %! %37 %IL % *'C'2C(3C(J7r3rc eZdZy)rN)r)r*r+r2r3r4rr*sr3rcd}tj||tj|z}tj|}t |}|tj|z}tj|}t |}|j dtj |d|r|rtjd|d|||fS)NFrT) seek_backz.Superfluous whitespace found in object header  ) rskip_over_commentrread_until_whitespacer9rQrJrwarning)rSr\extra idnum_bytesr>generation_bytesr?s r4_read_object_headerr.s E6" T & &v ..E,,V4K  E T & &v ..E11&9%&J KKNVt4 <gQzl $  * r3c||j} t||S#t$r}td||d}~wwxYw)Nz Failed to read object header at )rrrr)rSr\posrs r4r r FsI ++-C"6622 #.se 4  s  ;6;ceZdZdZhdZddZdejfdZdZ e jdfde fd Z d Z d Zdd ejfd ZdZdZdZdZddZy)rz The standard mandates that each trailer shall contain at least all keys used in the preceding trailer, even if unmodified. Of course, we cannot trust documents to actually follow this rule, so this class implements fallbacks. >/Filter/Length /DecodeParmsr`rr^rcDg|_tj|_yr)_trailer_revisionsr r _new_changesrs r4rzTrailerDictionary.__init__dsCE#446r3 trailer_dictc:|jj|yr)rr)rrs r4rz&TrailerDictionary.add_trailer_revisionjs &&|4r3c@|j|jSr)r get_objectritems r4 __getitem__zTrailerDictionary.__getitem__ms||D!,,..r3NdecryptcR|j}| |jj||St |dz |z }||d}||j vr|dj||S|D]} |j||cSt|#t$rYTwxYw#t$rY>wxYw)NrHr)rrrrrcnon_trailer_keys)rkeyrrevision revisionsrs r4rzTrailerDictionary.raw_getrs ++   ((00g>> )nq(83G!'(+I $'' 'Q<''W5 5! 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A  r3)rrrNN)r)r*r+r,rrr rrrr TRANSPARENTrr!r$r,r/r2r5rr9r2r3r4rrPs~7 51I1I5/'9&D&D $:((@(@(M!& r3rc |jdtj|jd}|j d}|dk7r|d|z z Sd}|j||z |jd|z}|j d}|dk7ru|j||z |zd z t j||j}tdD](}|jd js#||zcStd ) NirCsxrefrBrrk rHz/Could not find xref table at specified location) rKrLrMrQfindrfindrrrrPrr)rSrtmpxref_locxrefstm_readback newline_loc line_startlooks r4rrs KKR[[! ++b/Cxx H2~BM** KK ,,- ++a** +C))E"Kb I 00;>BC !!&)[[] !H )D{{1~%%'!D(( ) H IIr3cdkr*tdz }tjd||zdStfdt |DS)Nz>qrc3@K|]\}}|d|z dz zzyw)rHNr2).0redigitrUs r4 z!convert_to_int..s'Pib%534"9q=11Ps)bytesstructunpacksumr)rgrUpaddings ` r4rdrdsF qyD/}}T7Q;/22P9Q<PPPr3c eZdZdZdeefdZedZde jfdZ dZ de jfdZ d efd Zd efd Zd ee jfd Zd ee jfd Zd efdZd eeeeffdZdZed efdZy)ra/ Internal class to parse & store information from the xref section(s) of a PDF document. Stores both the most recent status of all xrefs in addition to their historical values. All members of this class are considered internal API and are subject to change without notice. xref_sectionsc||_||_|Dchc].}|jj|jj0c}|_ycc}wr)reader_xref_sectionsrr~xref_stream_refs)rrVrTrs r4rzXRefCache.__init__sQ +)!   ++7    ( (! ! s3Ac,t|jSr)rcrWrs r4total_revisionszXRefCache.total_revisionss4&&''r3rctt|jD]=\}} |jj |t |jdz |z cSt |#t $rYVwxYwr&)rrrWrrrcr)rrrers r4get_last_changezXRefCache.get_last_change sy$Xd.A.A%BC KB !!--c24../!3b88 sm  s5A** A65A6c|j|}|jjDchc]#}tj||j %c}Scc}w)Nr)rWrrr rrV)rrr objstm_ids r4object_streams_used_inz XRefCache.object_streams_used_insQ%%h/%..??    iT[[ 9   s(Act|jD]'\}} |jj|}||cS)t |#t$rY@wxYwr)rrWrrr)rrrerresults r4get_introducing_revisionz"XRefCache.get_introducing_revisionsk$T%8%89 KB  **66s;%I& sm  sA  AAr@c8|j|}|jSr)rWrrrrs r4get_xref_container_infoz!XRefCache.get_xref_container_info&%%h/   r3c8|j|}|jSr)rWrrds r4 get_xref_datazXRefCache.get_xref_data*rfr3c |j|}|jjDchc]'\}}tj|||j )}}}|jj }|L||jjDchc]'\}}tj|||j )c}}z}|Scc}}wcc}}w)a Look up the object refs for all objects explicitly added or overwritten in a given revision. :param revision: A revision number. The oldest revision is zero. :return: A set of Reference objects. r)rWrrr rrVr)rrrr>r?rars r4rz#XRefCache.explicit_refs_in_revision.s%%h/&-%6%6%P%P !z   eZT[[ A  ""))   )/)9)9)S)S%E:!!%E F  s ,B> ,Cc |j|}|jjjDchc]/\}}|dkDr%t j ||dz |j 1c}}Scc}}w)z Look up the object refs for all objects explicitly freed in a given revision. :param revision: A revision number. The oldest revision is zero. :return: A set of Reference objects. rrHr)rWrrrr rrV)rrrr>gens r4refs_freed_in_revisionz XRefCache.refs_freed_in_revisionFsm%%h/&//55;;= sQw   eS1W$++ >   s4A/cL|j|}|jjS)a Look up the location of the XRef table/stream associated with a specific revision, as indicated by startxref or /Prev. :param revision: A revision number. The oldest revision is zero. :return: An integer pointer )rWrr{rds r4get_startxref_for_revisionz$XRefCache.get_startxref_for_revisionWs&%%h/  333r3ct|jd|dzD]!} |jj|}|cSy#t$rY0wxYw)ab Look up the location of the historical value of an object. .. note:: This method is not suitable for determining whether or not a particular object ID is available in a given revision, since it treats unused objects and freed objects the same way. :param ref: An object reference. :param revision: A revision number. The oldest revision is zero. :return: An integer offset, an object stream reference, or ``None`` if the reference does not resolve in the specified revision. NrH)rrWrrr)rrrrras r4get_historical_refzXRefCache.get_historical_refdsb&  3 3Nhl CD G  **66s;    sA A  A cR|j|t|jdz Sr&)rprcrW)rrs r4rzXRefCache.__getitem__s'&&sC0C0C,Dq,HIIr3c:td|jDS)z Determine if a file uses hybrid references anywhere. :return: ``True`` if hybrid references were detected, ``False`` otherwise. c3jK|]+}|jjtjk(-ywr)rrzrrw)rKrs r4rMz1XRefCache.hybrid_xrefs_present..s/     / /?3N3N N s13)anyrWrs r4hybrid_xrefs_presentzXRefCache.hybrid_xrefs_presents$ ..   r3N)r)r*r+r,rrrpropertyrZr rr\r_rbrrerrhr rrlr9rnr r rrprrrur2r3r4rrs   d;.?  ((7#4#4  G,=,= !3F!!!S9J9J5K0 #g6G6G2H " 4c 4 %\)* +8J   d    r3rcheZdZdZd dZdZdZdedejfdZ dejfd Z y ) r$u Utility class to collect objects into a PDF object stream. Object streams are mainly useful for space efficiency reasons. They allow related objects to be grouped & compressed together in a more flexible manner. .. warning:: Object streams can only be used in files with a cross-reference stream, as opposed to a classical XRef table. In particular, this means that incremental updates to files with a legacy XRef table cannot contain object streams either. See § 7.5.7 in ISO 32000-1 for further details. .. danger:: Use :meth:`.BasePdfFileWriter.prepare_object_stream` to create instances of object streams. The `__init__` function is internal API. c.i|_||_d|_yr) _obj_refscompressr)rrzs r4rzObjectStream.__init__s  r3c,t|jSr)rryrs r4__bool__zObjectStream.__bool__sDNN##r3cHt|jjSr)r4ryrrs r4r5zObjectStream.__iter__sDNN((*++r3r>objcXt|tr td||j|<y)a Add an object to an object stream. Note that objects in object streams always have their generation number set to `0` by definition. :param idnum: The object's ID number. :param obj: The object to embed into the object stream. :raise TypeError: Raised if ``obj`` is an instance of :class:`~.generic.StreamObject` or :class:`~.generic.IndirectObject`. zJStream objects and bare references cannot be embedded into object streams.N)rr& TypeErrorry)rr>r~s r4 add_objectzObjectStream.add_objects1 c. /" !$ur3r@c t}t}|jjD]=\}}|j}|j |d|j d||fz?|j}|j d|j|}||jz}tjtdtdtdtjt|jtdtj|i|} |jr| j| S) z Render the object stream to a PDF stream object :return: An instance of :class:`~.generic.StreamObject`. Ns%d %d rrz/ObjStmz/Nz/First)ri)rryrrr9writerKrQgetvaluer rrrNrcrz) r stream_header main_bodyr>r~rXfirst_obj_offsetsh_bytesri stream_objects r4 as_pdf_objectzObjectStream.as_pdf_objects  I ....0 =JE3^^%F    4 0    UFO ; < = )--/1 %%&67!3!3!55 ,,!8I#6 4 4S5H I"G$8$89I$J  $   ==  " " $r3NT) r)r*r+r,rr|r5r9r PdfObjectrrrr2r3r4r$r$sA* $,$$'*;*;$,w33r3r$c# Kd}g}|jsyt|jd}t|\\}}}|D]3}|\}}|r||dzk7r ||fg}|}|j|||f|}5||fyw)zT Helper method to divide the XRef table (or stream) into contiguous chunks. Nc |dSr&r2)ts r4z)_contiguous_xref_chunks..s !A$r3)rrH)r2sortedrr) position_dictprevious_idnum current_chunkkey_iterr first_idnumrer?r>s r4_contiguous_xref_chunksrsNM    m((*?H!%hQ h  E Unq&88}, ,MK mB/<=  } $$sBBrcj}jdt|}fd}fd} t|\}}d}|dk(r/|dt |dzj|||n<jdj|||t ||||D]\}}||t |||!|S#t$rjd|cYSwxYw) Nsxref cTd||fz}j|jdy)Nz%d %d asciirencode)r>lengthheaderrSs r4 write_headerz&write_xref_table..write_headers&eV_, V]]7+,r3ch|D],\}}d||fz}j|jd.y)Nz%010d %05d n rr)chunkpositionr?entryrSs r4write_subsectionz*write_xref_table..write_subsection s;$) 0 Hj%:(>>E LLg. / 0r3s0 0 s0000000000 65535 f rHrs0 1 )rrrr StopIterationrc) rSr xref_location subsectionsrrr subsection null_obj_refs ` r4r#r#sKKMM LL *-8K-0 "&{"3 Z,LaQJ!+, \"$  X \"[#j/2$#.% Z[#j/2$% 5  XsCC>=C>c0eZdZdeffd Zdfd ZxZS)r%rct|||_ttj d}|j tdt j|tdtdiy)N)rHrHrkr`rr) superrrmapr rNr'r ArrayObject)rrwidths __class__s r4rzXRefStream.__init__Es^ * W))95  3 3F ;!8G#4  r3cddg}t|j}t}|jd|D]\}}||t |gz }|D]\} } t | t rh| dk(sJ| \} } |jd|jtjd| |jtjd| ~|jd|jtjd| |jtjd| tjttj|} | |td<|j|_t |E|dy) NrrHs z>Qz>Hr^)rrrrrcrtuplerOpackr rrrNr getbuffer_datarr9)rrSrrindexrstream_contentrrrr?obj_stream_numre index_entryrs r4r9zXRefStream.write_to_streamTs`A-d.@.@A  67'2 H #K k3z?3 3E(2 H$*h.%?*?)1&NB"((1"((T>)JK"((T2)>?"((1"((T8)DE"((T:)FG H H))#g.B.BE*JK #.Xh  #--/  -r3r:)r)r*r+r'rr9 __classcell__)rs@r4r%r%Ds  l  ..r3r%r)Dr,r-loggingrLrO dataclassesrior itertoolsrtypingrrrr r r r pyhanko.pdf_utilsr rpyhanko.pdf_utils.genericrrpyhanko.pdf_utils.miscrrrpyhanko.pdf_utils.rw_commonr__all__ getLoggerr)runiqueEnumrrrr"rrr!rrrrr9rrrrrrr rrrrdrr'rr&r$rr#r%r2r3r4rs  !DDD+BII2 ,   8 $tyy * $     $4E) 3E)R7;[Q%%[Q/3[Q i[Q| dii    $Bl(l(^ $"j j!j15k1BjZD->${*;>Bppf D-- 0s ))s lJ:Qe e PE#s(OU3c3h+?%@@A --w/C/CDRRj%B.DsCx#1E,F.b+.%%+.r3