| /** |
| * @license |
| * Copyright 2020 Google LLC |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| |
| /** |
| * @fileoverview Several simple wrappers of crypto.getRandomValues. |
| */ |
| import {InvalidArgumentsException} from '../exception/invalid_arguments_exception'; |
| |
| /** |
| * Randomly generates `n` bytes. |
| * |
| * @param n number of bytes to generate |
| * @return the random bytes |
| * @static |
| */ |
| export function randBytes(n: number): Uint8Array { |
| if (!Number.isInteger(n) || n < 0) { |
| throw new InvalidArgumentsException('n must be a nonnegative integer'); |
| } |
| const result = new Uint8Array(n); |
| crypto.getRandomValues(result); |
| return result; |
| } |