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handle brave fingerprinting blocking strict vs standard #16
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@abrahamjuliot
abrahamjuliot committed Jun 10, 2021
1 parent 599586f commit 0379586
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Showing 2 changed files with 138 additions and 34 deletions.
127 changes: 95 additions & 32 deletions creep.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import { isChrome, isBrave, isFirefox, getOS, decryptUserAgent, getUserAgentPlatform, logTestResult, getPromiseRaceFulfilled } from './modules/helpers.js'
import { isChrome, isBrave, getBraveMode, isFirefox, getOS, decryptUserAgent, getUserAgentPlatform, logTestResult, getPromiseRaceFulfilled } from './modules/helpers.js'
import { patch, html, note, count, modal } from './modules/html.js'
import { hashMini, instanceId, hashify } from './modules/crypto.js'

Expand Down Expand Up @@ -32,6 +32,7 @@ const imports = {
// helpers
isChrome,
isBrave,
getBraveMode,
isFirefox,
getOS,
decryptUserAgent,
Expand Down Expand Up @@ -259,25 +260,89 @@ const imports = {
console.groupEnd()

// Trusted Fingerprint
const distrust = { distrust: { brave: isBrave, firefox: isFirefox } }
const braveMode = getBraveMode()
const braveFingerprintingBlocking = isBrave && (braveMode.standard || braveMode.strict)
const getBraveUnprotectedParameters = parameters => {
const blocked = new Set([
'FRAGMENT_SHADER.HIGH_FLOAT.precision',
'FRAGMENT_SHADER.HIGH_FLOAT.rangeMax',
'FRAGMENT_SHADER.HIGH_FLOAT.rangeMin',
'FRAGMENT_SHADER.HIGH_INT.precision',
'FRAGMENT_SHADER.HIGH_INT.rangeMax',
'FRAGMENT_SHADER.HIGH_INT.rangeMin',
'FRAGMENT_SHADER.LOW_FLOAT.precision',
'FRAGMENT_SHADER.LOW_FLOAT.rangeMax',
'FRAGMENT_SHADER.LOW_FLOAT.rangeMin',
'FRAGMENT_SHADER.MEDIUM_FLOAT.precision',
'FRAGMENT_SHADER.MEDIUM_FLOAT.rangeMax',
'FRAGMENT_SHADER.MEDIUM_FLOAT.rangeMin',
'MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS',
'MAX_COMBINED_UNIFORM_BLOCKS',
'MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS',
'MAX_DRAW_BUFFERS_WEBGL',
'MAX_FRAGMENT_INPUT_COMPONENTS',
'MAX_FRAGMENT_UNIFORM_BLOCKS',
'MAX_FRAGMENT_UNIFORM_COMPONENTS',
'MAX_TEXTURE_MAX_ANISOTROPY_EXT',
'MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS',
'MAX_UNIFORM_BUFFER_BINDINGS',
'MAX_VARYING_COMPONENTS',
'MAX_VERTEX_OUTPUT_COMPONENTS',
'MAX_VERTEX_UNIFORM_BLOCKS',
'MAX_VERTEX_UNIFORM_COMPONENTS',
'SHADING_LANGUAGE_VERSION',
'UNMASKED_RENDERER_WEBGL',
'UNMASKED_VENDOR_WEBGL',
'VERSION',
'VERTEX_SHADER.HIGH_FLOAT.precision',
'VERTEX_SHADER.HIGH_FLOAT.rangeMax',
'VERTEX_SHADER.HIGH_FLOAT.rangeMin',
'VERTEX_SHADER.HIGH_INT.precision',
'VERTEX_SHADER.HIGH_INT.rangeMax',
'VERTEX_SHADER.HIGH_INT.rangeMin',
'VERTEX_SHADER.LOW_FLOAT.precision',
'VERTEX_SHADER.LOW_FLOAT.rangeMax',
'VERTEX_SHADER.LOW_FLOAT.rangeMin',
'VERTEX_SHADER.MEDIUM_FLOAT.precision',
'VERTEX_SHADER.MEDIUM_FLOAT.rangeMax',
'VERTEX_SHADER.MEDIUM_FLOAT.rangeMin'
])
const safeParameters = Object.keys(parameters).reduce((acc, curr) => {
if (blocked.has(curr)) {
return acc
}
acc[curr] = parameters[curr]
return acc
}, {})
return safeParameters
}
const trashLen = fp.trash.trashBin.length
const liesLen = !('totalLies' in fp.lies) ? 0 : fp.lies.totalLies
const errorsLen = fp.capturedErrors.data.length
const navigatorHighEntropy = !fp.navigator ? {} : {
device: fp.navigator.device,
doNotTrack: fp.navigator.doNotTrack,
globalPrivacyControl: fp.navigator.globalPrivacyControl,
keyboard: fp.navigator.keyboard,
language: fp.navigator.language,
maxTouchPoints: fp.navigator.maxTouchPoints,
mimeTypes: fp.navigator.mimeTypes,
platform: fp.navigator.platform,
system: fp.navigator.system,
vendor: fp.navigator.vendor,
lied: fp.navigator.lied
}
const creep = {
navigator: (
!fp.navigator || fp.navigator.lied ? undefined : {
device: fp.navigator.device,
deviceMemory: isBrave ? distrust : fp.navigator.deviceMemory,
doNotTrack: fp.navigator.doNotTrack,
hardwareConcurrency: isBrave ? distrust : fp.navigator.hardwareConcurrency,
maxTouchPoints: fp.navigator.maxTouchPoints,
mimeTypes: fp.navigator.mimeTypes,
plugins: isBrave ? distrust : fp.navigator.plugins,
platform: fp.navigator.platform,
system: fp.navigator.system,
vendor: fp.navigator.vendor,
lied: fp.navigator.lied
}
!fp.navigator ? undefined : (
braveFingerprintingBlocking ? navigatorHighEntropy :
fp.navigator.lied ? undefined : {
deviceMemory: fp.navigator.deviceMemory,
hardwareConcurrency: fp.navigator.hardwareConcurrency,
plugins: fp.navigator.plugins,
...navigatorHighEntropy
}
)
),
screen: (
!fp.screen || fp.screen.lied || (!!liesLen && isFirefox) ? undefined : {
Expand All @@ -294,25 +359,21 @@ const imports = {
fp.workerScope.canvas2d
),
deviceMemory: (
!!liesLen && isBrave ? distrust :
fp.workerScope.deviceMemory
braveFingerprintingBlocking ? undefined : fp.workerScope.deviceMemory
),
hardwareConcurrency: (
!!liesLen && isBrave ? distrust :
fp.workerScope.hardwareConcurrency
braveFingerprintingBlocking ? undefined : fp.workerScope.hardwareConcurrency
),
language: fp.workerScope.language,
platform: fp.workerScope.platform,
system: fp.workerScope.system,
device: fp.workerScope.device,
timezoneLocation: fp.workerScope.timezoneLocation,
['webgl renderer']: (
!!liesLen && isBrave ? distrust :
fp.workerScope.webglRenderer
braveFingerprintingBlocking ? undefined : fp.workerScope.webglRenderer
),
['webgl vendor']: (
!!liesLen && isBrave ? distrust :
fp.workerScope.webglVendor
braveFingerprintingBlocking ? undefined : fp.workerScope.webglVendor
)
} : undefined,
media: fp.media,
Expand All @@ -322,13 +383,17 @@ const imports = {
lied: fp.canvas2d.lied
}
),
canvasWebgl: (
!fp.canvasWebgl || fp.canvasWebgl.lied ? undefined :
fp.canvasWebgl
canvasWebgl: !fp.canvasWebgl ? undefined : (
braveFingerprintingBlocking ? {
parameters: getBraveUnprotectedParameters(fp.canvasWebgl.parameters)
} : fp.canvasWebgl.lied ? undefined : fp.canvasWebgl
),
cssMedia: !fp.cssMedia ? undefined : {
reducedMotion: caniuse(() => fp.cssMedia.mediaCSS['prefers-reduced-motion']),
colorScheme: caniuse(() => fp.cssMedia.mediaCSS['prefers-color-scheme']),
colorScheme: (
braveFingerprintingBlocking ? undefined :
caniuse(() => fp.cssMedia.mediaCSS['prefers-color-scheme'])
),
monochrome: caniuse(() => fp.cssMedia.mediaCSS.monochrome),
invertedColors: caniuse(() => fp.cssMedia.mediaCSS['inverted-colors']),
forcedColors: caniuse(() => fp.cssMedia.mediaCSS['forced-colors']),
Expand All @@ -351,13 +416,11 @@ const imports = {
},
svg: !fp.svg || fp.svg.lied ? undefined : fp.svg,
clientRects: !fp.clientRects || fp.clientRects.lied ? undefined : fp.clientRects,
offlineAudioContext: (
!!liesLen && isBrave && !!fp.offlineAudioContext ? {
offlineAudioContext: !fp.offlineAudioContext ? undefined : (
braveFingerprintingBlocking ? {
values: fp.offlineAudioContext.values,
compressorGainReduction: fp.offlineAudioContext.compressorGainReduction
} :
!fp.offlineAudioContext || fp.offlineAudioContext.lied ? undefined :
fp.offlineAudioContext
} : fp.offlineAudioContext.lied ? undefined : fp.offlineAudioContext
),
fonts: !fp.fonts || fp.fonts.lied ? undefined : fp.fonts,
// skip trash since it is random
Expand Down
45 changes: 43 additions & 2 deletions modules/helpers.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,47 @@
// Detect Browser
const isChrome = 'chrome' in window
const isBrave = 'brave' in navigator
const isBrave = (
'brave' in navigator &&
Object.getPrototypeOf(navigator.brave).constructor.name == 'Brave' &&
navigator.brave.isBrave.toString() == 'function isBrave() { [native code] }'
)

function getBraveMode() {
const mode = {
unknown: false,
allow: false,
standard: false,
strict: false
}
try {
// strict mode limits supported extensions
const canvas = document.createElement('canvas')
const gl = canvas.getContext('webgl')
const extensions = gl.getSupportedExtensions()
if (
!extensions || (
new Set(extensions).size == 1 && extensions[0] == 'WEBGL_debug_renderer_info')
) {
mode.strict = true
return mode
}
// standard and strict mode do not have chrome plugins
const chromePlugins = /(Chrom(e|ium)|Microsoft Edge) PDF (Plugin|Viewer)/
const pluginsList = [...navigator.plugins]
const hasChromePlugins = pluginsList
.filter(plugin => chromePlugins.test(plugin.name)).length == 2
if (!hasChromePlugins) {
mode.standard = true
return mode
}
mode.allow = true
return mode
} catch (e) {
mode.unknown = true
return mode
}
}

const isFirefox = typeof InstallTrigger !== 'undefined'

// system
Expand Down Expand Up @@ -187,4 +228,4 @@ const getPromiseRaceFulfilled = async ({
)
}

export { isChrome, isBrave, isFirefox, getOS, decryptUserAgent, getUserAgentPlatform, logTestResult, getPromiseRaceFulfilled }
export { isChrome, isBrave, getBraveMode, isFirefox, getOS, decryptUserAgent, getUserAgentPlatform, logTestResult, getPromiseRaceFulfilled }

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