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AlastairTaft/generate-key.js

Last active September 23, 2020 23:45
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Generates a URL safe key with sufficient bit complexity
Raw
generate-key.js
/**
* Generate a URL safe key with sufficient bits of complexity.
*/
const generateKey = function(bits){
var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "012345678910"
+ "-_"
var expectedEntroy = Math.pow(2, bits)
var key = ''
while(Math.pow(alphabet.length, key.length) < expectedEntroy){
key += alphabet[Math.floor(Math.random() * alphabet.length)]
}
return key
}
// Will result in at least 256 bits of entropy
console.log(generateKey(256))
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