diff options
Diffstat (limited to 'data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js')
| -rw-r--r-- | data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js | 79 |
1 files changed, 55 insertions, 24 deletions
diff --git a/data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js b/data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js index 018eaee..4bcd333 100644 --- a/data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js +++ b/data/extensions/jsr@javascriptrestrictor/wrappingS-NP.js @@ -47,6 +47,19 @@ * These approaches are inspired by the algorithms created by [Brave Software](https://brave.com) * available [here](https://github.com/brave/brave-core/blob/master/chromium_src/third_party/blink/renderer/modules/plugins/dom_plugin_array.cc). * + * The purpose of the wrappers is solely to prevent fingerprinting. However, + * browsers modyfing the array stand out of the crowd, which makes them more + * fingerprintable. Consequently, JShelter does not modify an empty list. So + * no matter the configuration, an empty list is not populated by the wrappers. + * + * If PDF inline viewing is supported, Firefox returns 5 plugins: + * * "PDF Viewer" + * * "Chrome PDF Viewer" + * * "Chromium PDF Viewer" + * * "Microsoft Edge PDF Viewer" + * * "WebKit built-in PDF" + * + * A list containing exactly these plugins is treated as the empty list and it is not modified. */ /* @@ -269,36 +282,54 @@ { parent_object: "Navigator.prototype", parent_object_property: "plugins", - apply_if: "navigator.plugins.length > 0", + apply_if: "applyWrapper", wrapped_objects: [], helping_code: methods + farbles + fakes +` - var fp_prng = alea(domainHash, "S-NP"); - var plugins = navigator.plugins; - var buffer = []; - if(args[0]==0){ - for(var i = 0;i<plugins.length;i++){ - buffer.push(farblePlugin(plugins[i]), fp_prng); - } + var applyWrapper = true; // Possibly overridden below + if (navigator.plugins.length === 0) { + applyWrapper = false; } - if(args[0]==1){ - for(var i = 0;i<plugins.length;i++){ - buffer.push(plugins[i]); + if (navigator.plugins.length === 5) { + let plugins = Array.prototype.reduce.call( + navigator.plugins, + function (acc, o) {acc.push(o.name); return acc;}, []); + if (plugins.includes("PDF Viewer") && + plugins.includes("Chrome PDF Viewer") && + plugins.includes("Chromium PDF Viewer") && + plugins.includes("Microsoft Edge PDF Viewer") && + plugins.includes( "WebKit built-in PDF")) { + applyWrapper = false; // See https://developer.mozilla.org/en-US/docs/Web/API/Navigator/plugins } - shuffleArray(buffer); - } - if(args[0]==0 || args[0]==1){ - var fakePlugin1 = fakePlugin(32, 16, 8); - var fakePlugin2 = fakePlugin(31, 15, 7); - buffer.push(fakePlugin1, fakePlugin2); - shuffleArray(buffer); - } - var fakePluginArray = fakePluginArrayF(buffer); - if(args[0]==1 || args[0]==2){ - var fakeMimeTypeArray = fakeMimeTypeArrayF([]); } - else { - var fakeMimeTypeArray = fakeMimeTypeArrayF(fakePluginArray); + if (applyWrapper) { + var fp_prng = alea(domainHash, "S-NP"); + var plugins = navigator.plugins; + var buffer = []; + if(args[0]==0){ + for(var i = 0;i<plugins.length;i++){ + buffer.push(farblePlugin(plugins[i], fp_prng)); + } + } + if(args[0]==1){ + for(var i = 0;i<plugins.length;i++){ + buffer.push(plugins[i]); + } + shuffleArray(buffer); + } + if(args[0]==0 || args[0]==1){ + var fakePlugin1 = fakePlugin(32, 16, 8); + var fakePlugin2 = fakePlugin(31, 15, 7); + buffer.push(fakePlugin1, fakePlugin2); + shuffleArray(buffer); + } + var fakePluginArray = fakePluginArrayF(buffer); + if(args[0]==1 || args[0]==2){ + var fakeMimeTypeArray = fakeMimeTypeArrayF([]); + } + else { + var fakeMimeTypeArray = fakeMimeTypeArrayF(fakePluginArray); + } } `, post_wrapping_code: [ |