hash.js

const crypto = require('crypto')

const searchStr = process.argv[2] || 'deadbeef'
const start = process.argv[3] || 42

const hasher = function *() {
    let acc = start 
    while (true) {
        yield [crypto
            .createHash('md5') 
            .update(acc.toString())
            .digest('hex'), acc]
        acc++
    }
}

const gen = hasher()

let run = true

while (run) {
    let hash = gen.next().value
    if (hash[1] % 100000 === 0) console.log(hash[1])
    if (hash[0].indexOf(searchStr) === -1) continue

    run = false
    console.log(hash)
}