78 lines
2.1 KiB
Markdown
78 lines
2.1 KiB
Markdown
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# random-bytes
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[![NPM Version][npm-image]][npm-url]
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[![NPM Downloads][downloads-image]][downloads-url]
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[![Node.js Version][node-version-image]][node-version-url]
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[![Build Status][travis-image]][travis-url]
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[![Test Coverage][coveralls-image]][coveralls-url]
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Generate strong pseudo-random bytes.
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This module is a simple wrapper around the Node.js core `crypto.randomBytes` API,
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with the following additions:
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* A `Promise` interface for environments with promises.
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* For Node.js versions that do not wait for the PRNG to be seeded, this module
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will wait a bit.
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## Installation
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```sh
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$ npm install random-bytes
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```
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## API
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```js
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var randomBytes = require('random-bytes')
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```
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### randomBytes(size, callback)
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Generates strong pseudo-random bytes. The `size` argument is a number indicating
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the number of bytes to generate.
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```js
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randomBytes(12, function (error, bytes) {
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if (error) throw error
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// do something with the bytes
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})
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```
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### randomBytes(size)
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Generates strong pseudo-random bytes and return a `Promise`. The `size` argument is
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a number indicating the number of bytes to generate.
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**Note**: To use promises in Node.js _prior to 0.12_, promises must be
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"polyfilled" using `global.Promise = require('bluebird')`.
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```js
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randomBytes(18).then(function (string) {
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// do something with the string
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})
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```
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### randomBytes.sync(size)
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A synchronous version of above.
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```js
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var bytes = randomBytes.sync(18)
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```
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## License
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[MIT](LICENSE)
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[npm-image]: https://img.shields.io/npm/v/random-bytes.svg
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[npm-url]: https://npmjs.org/package/random-bytes
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[node-version-image]: https://img.shields.io/node/v/random-bytes.svg
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[node-version-url]: http://nodejs.org/download/
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[travis-image]: https://img.shields.io/travis/crypto-utils/random-bytes/master.svg
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[travis-url]: https://travis-ci.org/crypto-utils/random-bytes
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[coveralls-image]: https://img.shields.io/coveralls/crypto-utils/random-bytes/master.svg
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[coveralls-url]: https://coveralls.io/r/crypto-utils/random-bytes?branch=master
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[downloads-image]: https://img.shields.io/npm/dm/random-bytes.svg
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[downloads-url]: https://npmjs.org/package/random-bytes
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