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miguelmota/bcrypt_salt.js

Last active July 16, 2019 00:59
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JavaScript extract salt from bcrypt hash
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bcrypt_salt.js
// the salt is the first 22 characters after the third '$'
// https://en.wikipedia.org/wiki/Bcrypt
const hash = '$2a$10$N9qo8uLOickgx2ZMRZoMyeIjZAgcfl7p92ldGxad68LJZdL17lhWy'
const salt = hash.split('$')[3].substr(0, 22)
console.log(salt) // N9qo8uLOickgx2ZMRZoMye
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