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813 lines
24 KiB
813 lines
24 KiB
/*******************************************************************************
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µMatrix - a Chromium browser extension to black/white list requests.
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Copyright (C) 2014 Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uMatrix
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*/
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/* global punycode, µMatrix */
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/* jshint bitwise: false */
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/******************************************************************************/
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µMatrix.Matrix = (function() {
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/******************************************************************************/
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var µm = µMatrix;
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var magicId = 'tckuvvpyvswo';
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/******************************************************************************/
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var Matrix = function() {
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this.reset();
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};
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/******************************************************************************/
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Matrix.Transparent = 0;
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Matrix.Red = 1;
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Matrix.Green = 2;
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Matrix.Gray = 3;
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Matrix.Indirect = 0x00;
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Matrix.Direct = 0x80;
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Matrix.RedDirect = Matrix.Red | Matrix.Direct;
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Matrix.RedIndirect = Matrix.Red | Matrix.Indirect;
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Matrix.GreenDirect = Matrix.Green | Matrix.Direct;
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Matrix.GreenIndirect = Matrix.Green | Matrix.Indirect;
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Matrix.GrayDirect = Matrix.Gray | Matrix.Direct;
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Matrix.GrayIndirect = Matrix.Gray | Matrix.Indirect;
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/******************************************************************************/
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var typeBitOffsets = {
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'*': 0,
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'doc': 2,
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'cookie': 4,
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'css': 6,
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'image': 8,
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'plugin': 10,
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'script': 12,
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'xhr': 14,
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'frame': 16,
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'other': 18
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};
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var stateToNameMap = {
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'1': 'block',
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'2': 'allow',
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'3': 'inherit'
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};
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var nameToStateMap = {
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'block': 1,
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'allow': 2,
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'inherit': 3
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};
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var nameToSwitchMap = {
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'on': true,
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'off': false
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};
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/******************************************************************************/
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var columnHeaders = (function() {
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var out = {};
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var i = 0;
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for ( var type in typeBitOffsets ) {
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if ( typeBitOffsets.hasOwnProperty(type) === false ) {
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continue;
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}
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out[type] = i++;
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}
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return out;
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})();
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/******************************************************************************/
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Matrix.getColumnHeaders = function() {
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return columnHeaders;
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};
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/******************************************************************************/
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// For performance purpose, as simple tests as possible
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var reHostnameVeryCoarse = /[g-z_-]/;
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var reIPv4VeryCoarse = /\.\d+$/;
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// http://tools.ietf.org/html/rfc5952
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// 4.3: "MUST be represented in lowercase"
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// Also: http://en.wikipedia.org/wiki/IPv6_address#Literal_IPv6_addresses_in_network_resource_identifiers
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var isIPAddress = function(hostname) {
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if ( reHostnameVeryCoarse.test(hostname) ) {
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return false;
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}
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if ( reIPv4VeryCoarse.test(hostname) ) {
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return true;
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}
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return hostname.charAt(0) === '[';
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};
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/******************************************************************************/
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var toBroaderHostname = function(hostname) {
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if ( hostname === '*' ) {
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return '';
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}
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if ( isIPAddress(hostname) ) {
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return '*';
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}
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var pos = hostname.indexOf('.');
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if ( pos === -1 ) {
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return '*';
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}
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return hostname.slice(pos + 1);
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};
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Matrix.toBroaderHostname = toBroaderHostname;
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/******************************************************************************/
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// Find out src-des relationship, using coarse-to-fine grained tests for
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// speed. If desHostname is 1st-party to srcHostname, the domain is returned,
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// otherwise the empty string.
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var extractFirstPartyDesDomain = function(srcHostname, desHostname) {
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if ( srcHostname === '*' || desHostname === '*' || desHostname === '1st-party' ) {
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return '';
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}
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var desDomain = µm.URI.domainFromHostname(desHostname);
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if ( desDomain === '' ) {
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return '';
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}
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var pos = srcHostname.length - desDomain.length;
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if ( pos < 0 || srcHostname.slice(pos) !== desDomain ) {
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return '';
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}
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if ( pos !== 0 && srcHostname.charAt(pos - 1) !== '.' ) {
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return '';
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}
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return desDomain;
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};
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/******************************************************************************/
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Matrix.prototype.reset = function() {
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this.switchedOn = {};
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this.rules = {};
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this.rootValue = Matrix.GreenIndirect;
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};
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/******************************************************************************/
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// Copy another matrix to self. Do this incrementally to minimize impact on
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// a live matrix.
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Matrix.prototype.assign = function(other) {
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var k;
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// Remove rules not in other
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for ( k in this.rules ) {
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if ( this.rules.hasOwnProperty(k) === false ) {
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continue;
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}
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if ( other.rules.hasOwnProperty(k) === false ) {
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delete this.rules[k];
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}
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}
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// Remove switches not in other
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for ( k in this.switchedOn ) {
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if ( this.switchedOn.hasOwnProperty(k) === false ) {
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continue;
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}
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if ( other.switchedOn.hasOwnProperty(k) === false ) {
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delete this.switchedOn[k];
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}
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}
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// Add/change rules in other
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for ( k in other.rules ) {
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if ( other.rules.hasOwnProperty(k) === false ) {
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continue;
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}
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this.rules[k] = other.rules[k];
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}
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// Add/change switches in other
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for ( k in other.switchedOn ) {
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if ( other.switchedOn.hasOwnProperty(k) === false ) {
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continue;
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}
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this.switchedOn[k] = other.switchedOn[k];
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}
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return this;
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};
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// https://www.youtube.com/watch?v=e9RS4biqyAc
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/******************************************************************************/
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// If value is undefined, the switch is removed
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Matrix.prototype.setSwitch = function(srcHostname, state) {
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if ( state !== undefined ) {
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if ( this.switchedOn.hasOwnProperty(srcHostname) === false || this.switchedOn[srcHostname] !== state ) {
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this.switchedOn[srcHostname] = state;
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return true;
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}
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} else {
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if ( this.switchedOn.hasOwnProperty(srcHostname) ) {
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delete this.switchedOn[srcHostname];
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return true;
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}
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}
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return false;
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};
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/******************************************************************************/
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Matrix.prototype.setCell = function(srcHostname, desHostname, type, state) {
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var bitOffset = typeBitOffsets[type];
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var k = srcHostname + ' ' + desHostname;
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var oldBitmap = this.rules[k];
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if ( oldBitmap === undefined ) {
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oldBitmap = 0;
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}
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var newBitmap = oldBitmap & ~(3 << bitOffset) | (state << bitOffset);
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if ( newBitmap === oldBitmap ) {
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return false;
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}
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if ( newBitmap === 0 ) {
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delete this.rules[k];
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} else {
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this.rules[k] = newBitmap;
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}
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.blacklistCell = function(srcHostname, desHostname, type) {
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var r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 1 ) {
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return false;
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}
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this.setCell(srcHostname, desHostname, type, 0);
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r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 1 ) {
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return true;
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}
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this.setCell(srcHostname, desHostname, type, 1);
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.whitelistCell = function(srcHostname, desHostname, type) {
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var r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 2 ) {
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return false;
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}
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this.setCell(srcHostname, desHostname, type, 0);
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r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 2 ) {
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return true;
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}
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this.setCell(srcHostname, desHostname, type, 2);
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.graylistCell = function(srcHostname, desHostname, type) {
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var r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 0 || r === 3 ) {
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return false;
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}
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this.setCell(srcHostname, desHostname, type, 0);
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r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 0 || r === 3 ) {
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return true;
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}
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this.setCell(srcHostname, desHostname, type, 3);
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.evaluateCell = function(srcHostname, desHostname, type) {
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var key = srcHostname + ' ' + desHostname;
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var bitmap = this.rules[key];
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if ( bitmap === undefined ) {
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return 0;
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}
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return bitmap >> typeBitOffsets[type] & 3;
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};
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/******************************************************************************/
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Matrix.prototype.evaluateCellZ = function(srcHostname, desHostname, type) {
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var bitOffset = typeBitOffsets[type];
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var s = srcHostname;
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var v;
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for (;;) {
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v = this.rules[s + ' ' + desHostname];
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if ( v !== undefined ) {
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v = v >> bitOffset & 3;
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if ( v !== 0 ) {
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return v;
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}
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}
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// TODO: external rules? (for presets)
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s = toBroaderHostname(s);
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if ( s === '' ) {
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break;
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}
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}
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// Preset blacklisted hostnames are blacklisted in global scope
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if ( type === '*' && µm.ubiquitousBlacklist.test(desHostname) ) {
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return 1;
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}
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return 0;
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};
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/******************************************************************************/
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Matrix.prototype.evaluateCellZXY = function(srcHostname, desHostname, type) {
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// Matrix filtering switch
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if ( this.evaluateSwitchZ(srcHostname) !== true ) {
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return Matrix.GreenIndirect;
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}
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// Specific-hostname specific-type cell
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var r = this.evaluateCellZ(srcHostname, desHostname, type);
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if ( r === 1 ) { return Matrix.RedDirect; }
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if ( r === 2 ) { return Matrix.GreenDirect; }
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// Specific-hostname any-type cell
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var rl = this.evaluateCellZ(srcHostname, desHostname, '*');
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if ( rl === 1 ) { return Matrix.RedIndirect; }
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var d = desHostname;
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var firstPartyDesDomain = extractFirstPartyDesDomain(srcHostname, desHostname);
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// Ancestor cells, up to 1st-party destination domain
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if ( firstPartyDesDomain !== '' ) {
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for (;;) {
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if ( d === firstPartyDesDomain ) {
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break;
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}
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d = d.slice(d.indexOf('.') + 1);
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// specific-hostname specific-type cell
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r = this.evaluateCellZ(srcHostname, d, type);
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if ( r === 1 ) { return Matrix.RedIndirect; }
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if ( r === 2 ) { return Matrix.GreenIndirect; }
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// Do not override a narrower rule
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if ( rl !== 2 ) {
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rl = this.evaluateCellZ(srcHostname, d, '*');
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if ( rl === 1 ) { return Matrix.RedIndirect; }
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}
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}
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// 1st-party specific-type cell: it's a special row, it exists only in
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// global scope.
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r = this.evaluateCellZ(srcHostname, '1st-party', type);
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if ( r === 1 ) { return Matrix.RedIndirect; }
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if ( r === 2 ) { return Matrix.GreenIndirect; }
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// Do not override narrower rule
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if ( rl !== 2 ) {
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rl = this.evaluateCellZ(srcHostname, '1st-party', '*');
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if ( rl === 1 ) { return Matrix.RedIndirect; }
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}
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}
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// Keep going, up to root
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for (;;) {
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d = toBroaderHostname(d);
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if ( d === '*' ) {
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break;
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}
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// specific-hostname specific-type cell
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r = this.evaluateCellZ(srcHostname, d, type);
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if ( r === 1 ) { return Matrix.RedIndirect; }
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if ( r === 2 ) { return Matrix.GreenIndirect; }
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// Do not override narrower rule
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if ( rl !== 2 ) {
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rl = this.evaluateCellZ(srcHostname, d, '*');
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if ( rl === 1 ) { return Matrix.RedIndirect; }
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}
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}
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// Any-hostname specific-type cells
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r = this.evaluateCellZ(srcHostname, '*', type);
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// Line below is strict-blocking
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if ( r === 1 ) { return Matrix.RedIndirect; }
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// Narrower rule wins
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if ( rl === 2 ) { return Matrix.GreenIndirect; }
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if ( r === 2 ) { return Matrix.GreenIndirect; }
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// Any-hostname any-type cell
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r = this.evaluateCellZ(srcHostname, '*', '*');
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if ( r === 1 ) { return Matrix.RedIndirect; }
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if ( r === 2 ) { return Matrix.GreenIndirect; }
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return this.rootValue;
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};
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// https://www.youtube.com/watch?v=4C5ZkwrnVfM
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/******************************************************************************/
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Matrix.prototype.evaluateRowZXY = function(srcHostname, desHostname) {
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var out = [];
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for ( var type in typeBitOffsets ) {
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if ( typeBitOffsets.hasOwnProperty(type) === false ) {
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continue;
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}
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out.push(this.evaluateCellZXY(srcHostname, desHostname, type));
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}
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return out;
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};
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/******************************************************************************/
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Matrix.prototype.mustBlock = function(srcHostname, desHostname, type) {
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return (this.evaluateCellZXY(srcHostname, desHostname, type) & 3) === Matrix.Red;
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};
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/******************************************************************************/
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Matrix.prototype.srcHostnameFromRule = function(rule) {
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return rule.slice(0, rule.indexOf(' '));
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};
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/******************************************************************************/
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Matrix.prototype.desHostnameFromRule = function(rule) {
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return rule.slice(rule.indexOf(' ') + 1);
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};
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/******************************************************************************/
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Matrix.prototype.toggleSwitch = function(srcHostname, newState) {
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if ( newState === undefined ) {
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newState = !this.evaluateSwitchZ(srcHostname);
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}
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delete this.switchedOn[srcHostname];
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var oldState = this.evaluateSwitchZ(srcHostname);
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if ( newState === oldState ) {
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return false;
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}
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this.switchedOn[srcHostname] = newState;
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.evaluateSwitch = function(srcHostname) {
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var b = this.switchedOn[srcHostname];
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if ( b !== undefined ) {
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return b;
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}
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return true;
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};
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/******************************************************************************/
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Matrix.prototype.evaluateSwitchZ = function(srcHostname) {
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var b;
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var s = srcHostname;
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for (;;) {
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b = this.switchedOn[s];
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if ( b !== undefined ) {
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return b;
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}
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s = toBroaderHostname(s);
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if ( s === '' ) {
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break;
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}
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}
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return true;
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};
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/******************************************************************************/
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// TODO: In all likelyhood, will have to optmize here, i.e. keeping an
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// up-to-date collection of src hostnames with reference count etc.
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Matrix.prototype.extractAllSourceHostnames = function() {
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var srcHostnames = {};
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var rules = this.rules;
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for ( var rule in rules ) {
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if ( rules.hasOwnProperty(rule) === false ) {
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continue;
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}
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srcHostnames[rule.slice(0, rule.indexOf(' '))] = true;
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}
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return srcHostnames;
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};
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/******************************************************************************/
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// TODO: In all likelyhood, will have to optmize here, i.e. keeping an
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// up-to-date collection of src hostnames with reference count etc.
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Matrix.prototype.extractAllDestinationHostnames = function() {
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var desHostnames = {};
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var rules = this.rules;
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for ( var rule in rules ) {
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if ( rules.hasOwnProperty(rule) === false ) {
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continue;
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}
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desHostnames[this.desHostnameFromRule(rule)] = true;
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}
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return desHostnames;
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};
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/******************************************************************************/
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Matrix.prototype.toString = function() {
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var out = [];
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var rule, type, val;
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var srcHostname, desHostname;
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for ( rule in this.rules ) {
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if ( this.rules.hasOwnProperty(rule) === false ) {
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continue;
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}
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srcHostname = this.srcHostnameFromRule(rule);
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desHostname = this.desHostnameFromRule(rule);
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for ( type in typeBitOffsets ) {
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if ( typeBitOffsets.hasOwnProperty(type) === false ) {
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continue;
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}
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val = this.evaluateCell(srcHostname, desHostname, type);
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if ( val === 0 ) {
|
|
continue;
|
|
}
|
|
out.push(
|
|
punycode.toUnicode(srcHostname) + ' ' +
|
|
punycode.toUnicode(desHostname) + ' ' +
|
|
type + ' ' +
|
|
stateToNameMap[val]
|
|
);
|
|
}
|
|
}
|
|
for ( srcHostname in this.switchedOn ) {
|
|
if ( this.switchedOn.hasOwnProperty(srcHostname) === false ) {
|
|
continue;
|
|
}
|
|
val = this.switchedOn[srcHostname] ? 'on' : 'off';
|
|
out.push('matrix: ' + srcHostname + ' ' + val);
|
|
}
|
|
return out.sort().join('\n');
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
Matrix.prototype.fromString = function(text, append) {
|
|
var matrix = append ? this : new Matrix();
|
|
var textEnd = text.length;
|
|
var lineBeg = 0, lineEnd;
|
|
var line, pos;
|
|
var fields, fieldVal;
|
|
var srcHostname = '';
|
|
var desHostname = '';
|
|
var type, state;
|
|
|
|
while ( lineBeg < textEnd ) {
|
|
lineEnd = text.indexOf('\n', lineBeg);
|
|
if ( lineEnd < 0 ) {
|
|
lineEnd = text.indexOf('\r', lineBeg);
|
|
if ( lineEnd < 0 ) {
|
|
lineEnd = textEnd;
|
|
}
|
|
}
|
|
line = text.slice(lineBeg, lineEnd).trim();
|
|
lineBeg = lineEnd + 1;
|
|
|
|
pos = line.indexOf('# ');
|
|
if ( pos !== -1 ) {
|
|
line = line.slice(0, pos).trim();
|
|
}
|
|
if ( line === '' ) {
|
|
continue;
|
|
}
|
|
|
|
fields = line.split(/\s+/);
|
|
|
|
// Less than 2 fields make no sense
|
|
if ( fields.length < 2 ) {
|
|
continue;
|
|
}
|
|
|
|
fieldVal = fields[0];
|
|
|
|
// Special directives:
|
|
|
|
// title
|
|
pos = fieldVal.indexOf('title:');
|
|
if ( pos !== -1 ) {
|
|
// TODO
|
|
continue;
|
|
}
|
|
|
|
// Name
|
|
pos = fieldVal.indexOf('name:');
|
|
if ( pos !== -1 ) {
|
|
// TODO
|
|
continue;
|
|
}
|
|
|
|
// Switch on/off
|
|
|
|
// `switch:` srcHostname state
|
|
// state = [`on`, `off`]
|
|
|
|
pos = fieldVal.indexOf('switch:');
|
|
if ( pos === -1 ) {
|
|
pos = fieldVal.indexOf('matrix:');
|
|
}
|
|
if ( pos !== -1 ) {
|
|
srcHostname = punycode.toASCII(fields[1]);
|
|
|
|
// No state field: reject
|
|
fieldVal = fields[2];
|
|
if ( fieldVal === null ) {
|
|
continue;
|
|
}
|
|
// Unknown state: reject
|
|
if ( nameToSwitchMap.hasOwnProperty(fieldVal) === false ) {
|
|
continue;
|
|
}
|
|
|
|
matrix.setSwitch(srcHostname, nameToSwitchMap[fieldVal]);
|
|
continue;
|
|
}
|
|
|
|
// Unknown directive
|
|
|
|
pos = fieldVal.indexOf(':');
|
|
if ( pos !== -1 ) {
|
|
continue;
|
|
}
|
|
|
|
// Valid rule syntax:
|
|
|
|
// srcHostname desHostname [type [state]]
|
|
// type = a valid request type
|
|
// state = [`block`, `allow`, `inherit`]
|
|
|
|
// srcHostname desHostname type
|
|
// type = a valid request type
|
|
// state = `allow`
|
|
|
|
// srcHostname desHostname
|
|
// type = `*`
|
|
// state = `allow`
|
|
|
|
// Lines with invalid syntax silently ignored
|
|
|
|
srcHostname = punycode.toASCII(fields[0]);
|
|
desHostname = punycode.toASCII(fields[1]);
|
|
|
|
fieldVal = fields[2];
|
|
|
|
if ( fieldVal !== undefined ) {
|
|
type = fieldVal;
|
|
// Unknown type: reject
|
|
if ( typeBitOffsets.hasOwnProperty(type) === false ) {
|
|
continue;
|
|
}
|
|
} else {
|
|
type = '*';
|
|
}
|
|
|
|
fieldVal = fields[3];
|
|
|
|
if ( fieldVal !== undefined ) {
|
|
// Unknown state: reject
|
|
if ( nameToStateMap.hasOwnProperty(fieldVal) === false ) {
|
|
continue;
|
|
}
|
|
state = nameToStateMap[fieldVal];
|
|
} else {
|
|
state = 2;
|
|
}
|
|
|
|
matrix.setCell(srcHostname, desHostname, type, state);
|
|
}
|
|
|
|
if ( !append ) {
|
|
this.assign(matrix);
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
Matrix.prototype.toSelfie = function() {
|
|
return {
|
|
magicId: magicId,
|
|
switchedOn: this.switchedOn,
|
|
rules: this.rules
|
|
};
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
Matrix.prototype.fromSelfie = function(selfie) {
|
|
this.switchedOn = selfie.switchedOn;
|
|
this.rules = selfie.rules;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
Matrix.prototype.diff = function(other, srcHostname, desHostnames) {
|
|
var out = [];
|
|
var desHostname, type;
|
|
var i, thisVal, otherVal;
|
|
for (;;) {
|
|
thisVal = this.evaluateSwitch(srcHostname);
|
|
otherVal = other.evaluateSwitch(srcHostname);
|
|
if ( thisVal !== otherVal ) {
|
|
out.push({
|
|
'what': 'matrix',
|
|
'src': srcHostname
|
|
});
|
|
}
|
|
i = desHostnames.length;
|
|
while ( i-- ) {
|
|
desHostname = desHostnames[i];
|
|
for ( type in typeBitOffsets ) {
|
|
if ( typeBitOffsets.hasOwnProperty(type) === false ) {
|
|
continue;
|
|
}
|
|
thisVal = this.evaluateCell(srcHostname, desHostname, type);
|
|
otherVal = other.evaluateCell(srcHostname, desHostname, type);
|
|
if ( thisVal === otherVal ) {
|
|
continue;
|
|
}
|
|
out.push({
|
|
'what': 'rule',
|
|
'src': srcHostname,
|
|
'des': desHostname,
|
|
'type': type
|
|
});
|
|
}
|
|
}
|
|
srcHostname = toBroaderHostname(srcHostname);
|
|
if ( srcHostname === '' ) {
|
|
break;
|
|
}
|
|
}
|
|
return out;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
Matrix.prototype.applyDiff = function(diff, from) {
|
|
var changed = false;
|
|
var i = diff.length;
|
|
var action, val;
|
|
while ( i-- ) {
|
|
action = diff[i];
|
|
if ( action.what === 'matrix' ) {
|
|
val = from.evaluateSwitch(action.src);
|
|
changed = this.setSwitch(action.src, val) || changed;
|
|
continue;
|
|
}
|
|
if ( action.what === 'rule' ) {
|
|
val = from.evaluateCell(action.src, action.des, action.type);
|
|
changed = this.setCell(action.src, action.des, action.type, val) || changed;
|
|
continue;
|
|
}
|
|
}
|
|
return changed;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
return Matrix;
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://www.youtube.com/watch?v=wlNrQGmj6oQ
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|