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468ab4519e
PR-URL: https://github.com/nodejs/node/pull/20190 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com>
20 lines
692 B
JavaScript
20 lines
692 B
JavaScript
'use strict'
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var crypto = require('crypto')
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var MurmurHash3 = require('imurmurhash')
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module.exports = function (uniq) {
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if (uniq) {
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var hash = new MurmurHash3(uniq)
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return ('00000000' + hash.result().toString(16)).substr(-8)
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} else {
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// Called without a callback, because this interface should neither block
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// nor error (by contrast with randomBytes which will throw an exception
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// without enough entropy).
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//
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// However, due to a change in Node 0.10.27+, pseudoRandomBytes is now the
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// same as randomBytes, and may in fact block in situations where
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// insufficent entropy is available.
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return crypto.pseudoRandomBytes(4).toString('hex')
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}
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}
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