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Diffstat (limited to 'lib/html_script_finder/dom_handler/attributes.js')
-rw-r--r-- | lib/html_script_finder/dom_handler/attributes.js | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/lib/html_script_finder/dom_handler/attributes.js b/lib/html_script_finder/dom_handler/attributes.js new file mode 100644 index 0000000..3e95bab --- /dev/null +++ b/lib/html_script_finder/dom_handler/attributes.js @@ -0,0 +1,137 @@ +/** + * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript. + * * + * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +// object model for script entries. +var scriptObject = require("html_script_finder/dom_handler/script_object"); + +var scriptProperties = require("html_script_finder/dom_handler/script_properties"); + +const scriptTypes = scriptProperties.scriptTypes; + +const statusTypes = scriptProperties.statusTypes; + +var jsInAttrRe = /javascript:/ig; + +// the list of all available event attributes +var intrinsicEvents = [ + "onload", + "onunload", + "onclick", + "ondblclick", + "onmousedown", + "onmouseup", + "onmouseover", + "onmousemove", + "onmouseout", + "onfocus", + "onblur", + "onkeypress", + "onkeydown", + "onkeyup", + "onsubmit", + "onreset", + "onselect", + "onchange"]; + +exports.jsInAttrRe = jsInAttrRe; +exports.intrinsicEvents = intrinsicEvents; + + +/** + * findJSinAttribute + * + * Looks for attributes containing 'javascript:' + * + */ +exports.findJSinAttribute = function (elem, callback) { + var i = 0, attrLen = elem.attributes.length; + + var attribPairs = []; + + for (; i < attrLen; i++) { + + //looping through all attributes in elem to look for "javascript:" + attrib = elem.attributes[i]; + + if (attrib.value.match(jsInAttrRe)) { + str = attrib.value.replace(jsInAttrRe, ''); + attribPairs.push({attribute: attrib.name, value: str}); + } + + } + + if (attribPairs.length > 0) { + // contains in attribute javascript. + scriptEntry = scriptObject.Script({'type': scriptTypes.ATTRIBUTE, + 'status': statusTypes.UNCHECKED, + 'element': elem, + 'jsAttributes': attribPairs + }); + + // push back to DOMHandler + callback(scriptEntry); + + } else { + callback(false); + } + +}; + +/** + * findOnJSAttribute. + * + * Look for attributes in on* + * + */ +exports.findOnJSAttribute = function (elem, callback) { + + var i = 0, eventsLen = intrinsicEvents.length; + + var attribPairs = []; + + for (; i < eventsLen; i++) { + + // looping through all on* attributes + if (elem.hasAttribute(intrinsicEvents[i])) { + + attribPairs.push({ + attribute: intrinsicEvents[i], + value: elem.getAttribute(intrinsicEvents[i]) + }); + + } + + } + if (attribPairs.length > 0) { + + console.debug('found an attribute', scriptTypes.ATTRIBUTE); + scriptEntry = scriptObject.Script({'type': scriptTypes.ATTRIBUTE, + 'status': statusTypes.UNCHECKED, + 'element':elem, + 'jsAttributes': attribPairs + }); + // Push back to DOMHandler. + // push back to DOMHandler + callback(scriptEntry); + + } else { + callback(false); + } +}; |