unipdf/sanitize/sanitize.go

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// Copyright 2020 FoxyUtils ehf. All rights reserved.
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package sanitize ;import (_e "github.com/unidoc/unipdf/v3/common";_g "github.com/unidoc/unipdf/v3/core";);

// SanitizationOpts specifies the objects to be removed during sanitization.
type SanitizationOpts struct{

// JavaScript specifies wether JavaScript action should be removed. JavaScript Actions, section 12.6.4.16 of PDF32000_2008
JavaScript bool ;

// URI specifies if URI actions should be removed. 12.6.4.7 URI Actions, PDF32000_2008.
URI bool ;

// GoToR removes remote GoTo actions. 12.6.4.3 Remote Go-To Actions, PDF32000_2008.
GoToR bool ;

// GoTo specifies wether GoTo actions should be removed. 12.6.4.2 Go-To Actions, PDF32000_2008.
GoTo bool ;

// RenditionJS enables removing of `JS` entry from a Rendition Action.
// The `JS` entry has a value of text string or stream containing a JavaScript script that shall be executed when the action is triggered.
// 12.6.4.13 Rendition Actions Table 214, PDF32000_2008.
RenditionJS bool ;

// OpenAction removes OpenAction entry from the document catalog.
OpenAction bool ;

// Launch specifies wether Launch Action should be removed.
// A launch action launches an application or opens or prints a document.
// 12.6.4.5 Launch Actions, PDF32000_2008.
Launch bool ;};func (_gg *Sanitizer )processObjects (_f []_g .PdfObject )([]_g .PdfObject ,error ){_ee :=[]_g .PdfObject {};_fa :=_gg ._ef ;for _ ,_bg :=range _f {switch _cb :=_bg .(type ){case *_g .PdfIndirectObject :_bb ,_eb :=_g .GetDict (_cb );if _eb {if _ge ,_a :=_g .GetName (_bb .Get ("\u0054\u0079\u0070\u0065"));
_a &&*_ge =="\u0043a\u0074\u0061\u006c\u006f\u0067"{if _ ,_ea :=_g .GetIndirect (_bb .Get ("\u004f\u0070\u0065\u006e\u0041\u0063\u0074\u0069\u006f\u006e"));_ea &&_fa .OpenAction {_bb .Remove ("\u004f\u0070\u0065\u006e\u0041\u0063\u0074\u0069\u006f\u006e");
};}else if _ba ,_eg :=_g .GetName (_bb .Get ("\u0053"));_eg {switch *_ba {case "\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074":if _fa .JavaScript {if _ad ,_gf :=_g .GetStream (_bb .Get ("\u004a\u0053"));_gf {_ac :=[]byte {};_eae ,_fe :=_g .MakeStream (_ac ,nil );
if _fe ==nil {*_ad =*_eae ;};};_e .Log .Debug ("\u004a\u0061\u0076\u0061\u0073\u0063\u0072\u0069\u0070\u0074\u0020a\u0063\u0074\u0069\u006f\u006e\u0020\u0073\u006b\u0069\u0070p\u0065\u0064\u002e");continue ;};case "\u0055\u0052\u0049":if _fa .URI {_e .Log .Debug ("\u0055\u0052\u0049\u0020ac\u0074\u0069\u006f\u006e\u0020\u0073\u006b\u0069\u0070\u0070\u0065\u0064\u002e");
continue ;};case "\u0047\u006f\u0054\u006f":if _fa .GoTo {_e .Log .Debug ("G\u004fT\u004f\u0020\u0061\u0063\u0074\u0069\u006f\u006e \u0073\u006b\u0069\u0070pe\u0064\u002e");continue ;};case "\u0047\u006f\u0054o\u0052":if _fa .GoToR {_e .Log .Debug ("R\u0065\u006d\u006f\u0074\u0065\u0020G\u006f\u0054\u004f\u0020\u0061\u0063\u0074\u0069\u006fn\u0020\u0073\u006bi\u0070p\u0065\u0064\u002e");
continue ;};case "\u004c\u0061\u0075\u006e\u0063\u0068":if _fa .Launch {_e .Log .Debug ("\u004a\u0061\u0076\u0061\u0073\u0063\u0072\u0069\u0070\u0074\u0020a\u0063\u0074\u0069\u006f\u006e\u0020\u0073\u006b\u0069\u0070p\u0065\u0064\u002e");continue ;};case "\u0052e\u006e\u0064\u0069\u0074\u0069\u006fn":if _bbe ,_bge :=_g .GetStream (_bb .Get ("\u004a\u0053"));
_bge {_ab :=[]byte {};_cc ,_bd :=_g .MakeStream (_ab ,nil );if _bd ==nil {*_bbe =*_cc ;};};};}else if _eff :=_bb .Get ("\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074");_eff !=nil &&_fa .JavaScript {continue ;}else if _bga ,_ebg :=_g .GetName (_bb .Get ("\u0054\u0079\u0070\u0065"));
_ebg &&*_bga =="\u0041\u006e\u006eo\u0074"&&_fa .JavaScript {if _fee ,_db :=_g .GetIndirect (_bb .Get ("\u0050\u0061\u0072\u0065\u006e\u0074"));_db {if _ega ,_egf :=_g .GetDict (_fee .PdfObject );_egf {if _fd ,_bag :=_g .GetDict (_ega .Get ("\u0041\u0041"));
_bag {_abf ,_fg :=_g .GetIndirect (_fd .Get ("\u004b"));if _fg {if _gfd ,_feg :=_g .GetDict (_abf .PdfObject );_feg {if _bf ,_ca :=_g .GetName (_gfd .Get ("\u0053"));_ca &&*_bf =="\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"{_gfd .Clear ();
}else if _fgf :=_fd .Get ("\u0046");_fgf !=nil {if _df ,_fgb :=_g .GetIndirect (_fgf );_fgb {if _eea ,_bc :=_g .GetDict (_df .PdfObject );_bc {if _da ,_bba :=_g .GetName (_eea .Get ("\u0053"));_bba &&*_da =="\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"{_eea .Clear ();
};};};};};};};};};};};case *_g .PdfObjectStream :_e .Log .Debug ("\u0070d\u0066\u0020\u006f\u0062j\u0065\u0063\u0074\u0020\u0073t\u0072e\u0061m\u0020\u0074\u0079\u0070\u0065\u0020\u0025T",_cb );case *_g .PdfObjectStreams :_e .Log .Debug ("\u0070\u0064\u0066\u0020\u006f\u0062\u006a\u0065\u0063\u0074\u0020s\u0074\u0072\u0065\u0061\u006d\u0073\u0020\u0074\u0079\u0070e\u0020\u0025\u0054",_cb );
default:_e .Log .Debug ("u\u006e\u006b\u006e\u006fwn\u0020p\u0064\u0066\u0020\u006f\u0062j\u0065\u0063\u0074\u0020\u0025\u0054",_cb );};_ee =append (_ee ,_bg );};_gg .analyze (_ee );return _ee ,nil ;};

// New returns a new sanitizer object.
func New (opts SanitizationOpts )*Sanitizer {return &Sanitizer {_ef :opts }};func (_gee *Sanitizer )analyze (_aba []_g .PdfObject ){_eec :=map[string ]int {};for _ ,_ga :=range _aba {switch _gc :=_ga .(type ){case *_g .PdfIndirectObject :_eaed ,_ada :=_g .GetDict (_gc .PdfObject );
if _ada {if _cg ,_abd :=_g .GetName (_eaed .Get ("\u0054\u0079\u0070\u0065"));_abd &&*_cg =="\u0043a\u0074\u0061\u006c\u006f\u0067"{if _ ,_aa :=_g .GetIndirect (_eaed .Get ("\u004f\u0070\u0065\u006e\u0041\u0063\u0074\u0069\u006f\u006e"));_aa {_eec ["\u004f\u0070\u0065\u006e\u0041\u0063\u0074\u0069\u006f\u006e"]++;
};}else if _eee ,_bde :=_g .GetName (_eaed .Get ("\u0053"));_bde {_baf :=_eee .String ();if _baf =="\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"||_baf =="\u0055\u0052\u0049"||_baf =="\u0047\u006f\u0054\u006f"||_baf =="\u0047\u006f\u0054o\u0052"||_baf =="\u004c\u0061\u0075\u006e\u0063\u0068"{_eec [_baf ]++;
}else if _baf =="\u0052e\u006e\u0064\u0069\u0074\u0069\u006fn"{if _ ,_gce :=_g .GetStream (_eaed .Get ("\u004a\u0053"));_gce {_eec [_baf ]++;};};}else if _cce :=_eaed .Get ("\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074");_cce !=nil {_eec ["\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"]++;
}else if _gfde ,_cd :=_g .GetIndirect (_eaed .Get ("\u0050\u0061\u0072\u0065\u006e\u0074"));_cd {if _ed ,_baa :=_g .GetDict (_gfde .PdfObject );_baa {if _abb ,_fc :=_g .GetDict (_ed .Get ("\u0041\u0041"));_fc {_cgc :=_abb .Get ("\u004b");_ebc ,_ggb :=_g .GetIndirect (_cgc );
if _ggb {if _aed ,_dfb :=_g .GetDict (_ebc .PdfObject );_dfb {if _bfbb ,_efg :=_g .GetName (_aed .Get ("\u0053"));_efg &&*_bfbb =="\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"{_eec ["\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"]++;
}else if _ ,_ged :=_g .GetString (_aed .Get ("\u004a\u0053"));_ged {_eec ["\u004a\u0061\u0076\u0061\u0053\u0063\u0072\u0069\u0070\u0074"]++;}else {_ebe :=_abb .Get ("\u0046");if _ebe !=nil {_cfe ,_aec :=_g .GetIndirect (_ebe );if _aec {if _fda ,_fdd :=_g .GetDict (_cfe .PdfObject );
_fdd {if _ff ,_geb :=_g .GetName (_fda .Get ("\u0053"));_geb {_dg :=_ff .String ();_eec [_dg ]++;};};};};};};};};};};};};};_gee ._c =_eec ;};

// Sanitizer represents a sanitizer object.
// It implements the Optimizer interface to access the objects field from the writer.
type Sanitizer struct{_ef SanitizationOpts ;_c map[string ]int ;};

// Optimize optimizes `objects` and returns updated list of objects.
func (_gd *Sanitizer )Optimize (objects []_g .PdfObject )([]_g .PdfObject ,error ){return _gd .processObjects (objects );};

// GetSuspiciousObjects returns a count of each detected suspicious object.
func (_dgc *Sanitizer )GetSuspiciousObjects ()map[string ]int {return _dgc ._c };