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39 lines
1.5 KiB
39 lines
1.5 KiB
7 years ago
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const levenshtein = require('fast-levenshtein')
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const blacklistedMetaMaskDomains = ['metamask.com']
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let blacklistedDomains = require('etheraddresslookup/blacklists/domains.json').concat(blacklistedMetaMaskDomains)
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const whitelistedMetaMaskDomains = ['metamask.io', 'www.metamask.io']
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const whitelistedDomains = require('etheraddresslookup/whitelists/domains.json').concat(whitelistedMetaMaskDomains)
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const LEVENSHTEIN_TOLERANCE = 4
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const LEVENSHTEIN_CHECKS = ['myetherwallet', 'myetheroll', 'ledgerwallet', 'metamask']
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// credit to @sogoiii and @409H for their help!
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// Return a boolean on whether or not a phish is detected.
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function isPhish({ hostname, updatedBlacklist = null }) {
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var strCurrentTab = hostname
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// check if the domain is part of the whitelist.
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if (whitelistedDomains && whitelistedDomains.includes(strCurrentTab)) { return false }
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// Allow updating of blacklist:
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if (updatedBlacklist) {
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blacklistedDomains = blacklistedDomains.concat(updatedBlacklist)
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}
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// check if the domain is part of the blacklist.
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const isBlacklisted = blacklistedDomains && blacklistedDomains.includes(strCurrentTab)
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// check for similar values.
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let levenshteinMatched = false
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var levenshteinForm = strCurrentTab.replace(/\./g, '')
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LEVENSHTEIN_CHECKS.forEach((element) => {
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if (levenshtein.get(element, levenshteinForm) <= LEVENSHTEIN_TOLERANCE) {
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levenshteinMatched = true
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}
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})
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return isBlacklisted || levenshteinMatched
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}
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module.exports = isPhish
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