module Loofah module HTML5 # :nodoc: # # HTML whitelist lifted from HTML5lib sanitizer code: # # http://code.google.com/p/html5lib/ # # # # Copyright (c) 2006-2008 The Authors # # Contributors: # James Graham - jg307@cam.ac.uk # Anne van Kesteren - annevankesteren@gmail.com # Lachlan Hunt - lachlan.hunt@lachy.id.au # Matt McDonald - kanashii@kanashii.ca # Sam Ruby - rubys@intertwingly.net # Ian Hickson (Google) - ian@hixie.ch # Thomas Broyer - t.broyer@ltgt.net # Jacques Distler - distler@golem.ph.utexas.edu # Henri Sivonen - hsivonen@iki.fi # The Mozilla Foundation (contributions from Henri Sivonen since 2008) # # Permission is hereby granted, free of charge, to any person # obtaining a copy of this software and associated documentation # files (the "Software"), to deal in the Software without # restriction, including without limitation the rights to use, copy, # modify, merge, publish, distribute, sublicense, and/or sell copies # of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER # DEALINGS IN THE SOFTWARE. # # module WhiteList ACCEPTABLE_ELEMENTS = %w[a abbr acronym address area b big blockquote br button caption center cite code col colgroup dd del dfn dir div dl dt em fieldset font form h1 h2 h3 h4 h5 h6 hr i img input ins kbd label legend li map menu ol optgroup option p pre q s samp select small span strike strong sub sup table tbody td textarea tfoot th thead tr tt u ul var] MATHML_ELEMENTS = %w[annotation annotation-xml maction math merror mfrac mfenced mi mmultiscripts mn mo mover mpadded mphantom mprescripts mroot mrow mspace msqrt mstyle msub msubsup msup mtable mtd mtext mtr munder munderover none semantics] SVG_ELEMENTS = %w[a animate animateColor animateMotion animateTransform circle defs desc ellipse font-face font-face-name font-face-src foreignObject g glyph hkern linearGradient line marker metadata missing-glyph mpath path polygon polyline radialGradient rect set stop svg switch text title tspan use] ACCEPTABLE_ATTRIBUTES = %w[abbr accept accept-charset accesskey action align alt axis border cellpadding cellspacing char charoff charset checked cite class clear cols colspan color compact coords datetime dir disabled enctype for frame headers height href hreflang hspace id ismap label lang longdesc maxlength media method multiple name nohref noshade nowrap prompt readonly rel rev rows rowspan rules scope selected shape size span src start style summary tabindex target title type usemap valign value vspace width xml:lang] MATHML_ATTRIBUTES = %w[actiontype align close columnalign columnalign columnalign columnlines columnspacing columnspan depth display displaystyle encoding equalcolumns equalrows fence fontstyle fontweight frame height linethickness lspace mathbackground mathcolor mathvariant mathvariant maxsize minsize open other rowalign rowalign rowalign rowlines rowspacing rowspan rspace scriptlevel selection separator separators stretchy width width xlink:href xlink:show xlink:type xmlns xmlns:xlink] SVG_ATTRIBUTES = %w[accent-height accumulate additive alphabetic arabic-form ascent attributeName attributeType baseProfile bbox begin by calcMode cap-height class color color-rendering content cx cy d dx dy descent display dur end fill fill-opacity fill-rule font-family font-size font-stretch font-style font-variant font-weight from fx fy g1 g2 glyph-name gradientUnits hanging height horiz-adv-x horiz-origin-x id ideographic k keyPoints keySplines keyTimes lang marker-end marker-mid marker-start markerHeight markerUnits markerWidth mathematical max min name offset opacity orient origin overline-position overline-thickness panose-1 path pathLength points preserveAspectRatio r refX refY repeatCount repeatDur requiredExtensions requiredFeatures restart rotate rx ry slope stemh stemv stop-color stop-opacity strikethrough-position strikethrough-thickness stroke stroke-dasharray stroke-dashoffset stroke-linecap stroke-linejoin stroke-miterlimit stroke-opacity stroke-width systemLanguage target text-anchor to transform type u1 u2 underline-position underline-thickness unicode unicode-range units-per-em values version viewBox visibility width widths x x-height x1 x2 xlink:actuate xlink:arcrole xlink:href xlink:role xlink:show xlink:title xlink:type xml:base xml:lang xml:space xmlns xmlns:xlink y y1 y2 zoomAndPan] ATTR_VAL_IS_URI = %w[href src cite action longdesc xlink:href xml:base] SVG_ATTR_VAL_ALLOWS_REF = %w[clip-path color-profile cursor fill filter marker marker-start marker-mid marker-end mask stroke] SVG_ALLOW_LOCAL_HREF = %w[altGlyph animate animateColor animateMotion animateTransform cursor feImage filter linearGradient pattern radialGradient textpath tref set use] ACCEPTABLE_CSS_PROPERTIES = %w[azimuth background-color border-bottom-color border-collapse border-color border-left-color border-right-color border-top-color clear color cursor direction display elevation float font font-family font-size font-style font-variant font-weight height letter-spacing line-height overflow pause pause-after pause-before pitch pitch-range richness speak speak-header speak-numeral speak-punctuation speech-rate stress text-align text-decoration text-indent unicode-bidi vertical-align voice-family volume white-space width] ACCEPTABLE_CSS_KEYWORDS = %w[auto aqua black block blue bold both bottom brown center collapse dashed dotted fuchsia gray green !important italic left lime maroon medium none navy normal nowrap olive pointer purple red right solid silver teal top transparent underline white yellow] ACCEPTABLE_SVG_PROPERTIES = %w[fill fill-opacity fill-rule stroke stroke-width stroke-linecap stroke-linejoin stroke-opacity] ACCEPTABLE_PROTOCOLS = %w[ed2k ftp http https irc mailto news gopher nntp telnet webcal xmpp callto feed urn aim rsync tag ssh sftp rtsp afs] # subclasses may define their own versions of these constants ALLOWED_ELEMENTS = ACCEPTABLE_ELEMENTS + MATHML_ELEMENTS + SVG_ELEMENTS ALLOWED_ATTRIBUTES = ACCEPTABLE_ATTRIBUTES + MATHML_ATTRIBUTES + SVG_ATTRIBUTES ALLOWED_CSS_PROPERTIES = ACCEPTABLE_CSS_PROPERTIES ALLOWED_CSS_KEYWORDS = ACCEPTABLE_CSS_KEYWORDS ALLOWED_SVG_PROPERTIES = ACCEPTABLE_SVG_PROPERTIES ALLOWED_PROTOCOLS = ACCEPTABLE_PROTOCOLS VOID_ELEMENTS = %w[ base link meta hr br img embed param area col input ] # additional tags we should consider safe since we have libxml2 fixing up our documents. TAGS_SAFE_WITH_LIBXML2 = %w[html head body] ALLOWED_ELEMENTS_WITH_LIBXML2 = ALLOWED_ELEMENTS + TAGS_SAFE_WITH_LIBXML2 end # # The HTML5lib whitelist arrays, transformed into hashes for faster lookup. # module HashedWhiteList WhiteList.constants.each do |constant| next unless WhiteList.module_eval("#{constant}").is_a?(Array) module_eval <<-CODE #{constant} = {} WhiteList::#{constant}.each { |c| #{constant}[c] = true ; #{constant}[c.downcase] = true } CODE end end end end