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generates a pw
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| import * as crypto from 'node:crypto'; | |
| const charactersUpper = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; | |
| const charactersLower = 'abcdefghijklmnopqrstuvwxyz'; | |
| const symbols = '!@#$%&?^*.:,;_-'; | |
| const decimalNumbers = '0123456789'; | |
| console.log(createRandomString(16, true, 'pw', true)); | |
| function createRandomString(length = 8, useSymbols = false, prefix = '', useNumbers = false) { | |
| let possibleChars = charactersUpper + charactersLower + (useSymbols ? symbols : '') + (useNumbers ? decimalNumbers : ''); | |
| const requiredChars = [rand(charactersUpper, 1), rand(charactersLower, 1)]; | |
| if (useSymbols) requiredChars.push(rand(symbols, 1)); | |
| if (useNumbers) requiredChars.push(rand(decimalNumbers, 1)); | |
| const randLength = length - requiredChars.length - prefix.length; | |
| const unshuffled = requiredChars.concat(rand(possibleChars, (randLength > 0) ? randLength : 0)); | |
| const shuffled = shuffleArray(unshuffled); | |
| return prefix + shuffled.join(''); | |
| } | |
| function shuffleArray(arr) { | |
| const randArr = new Uint32Array(arr.length + 1); | |
| crypto.getRandomValues(randArr); | |
| const randRangeArr = randArr.map(x => x % arr.length); | |
| for (let i = arr.length - 1; i >= 0; i--) { | |
| const j = randRangeArr[i]; | |
| [arr[i], arr[j]] = [arr[j], arr[i]]; | |
| } | |
| return arr; | |
| } | |
| function rand(str, num) { | |
| const randArr = new Uint32Array(num); | |
| crypto.getRandomValues(randArr); | |
| let output = []; | |
| for (let n of randArr) { | |
| output.push(str[n % str.length]); | |
| } | |
| return output; | |
| } |
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