@exodus/crypto

Reusable cryptography primitives, for browser/Node.js/Electron/React Native

For hashes not implemented by the platform, requires @noble/hashes dependency

A note about React Native

• On React Native, methods that use randomness expect globalThis.crypto.getRandomValues to work. That can be polyfilled with require('react-native-get-random-values').

• Buffer should be polyfilled (either globally or via a bundler).

Regular API

randomBytes(size)

import { randomBytes } from '@exodus/crypto/randomBytes'

Returns a Buffer instance of length size filled from CSPRNG.

On non-Node.js environments, requires polyfilled Buffer.

randomUUID()

import { randomUUID } from '@exodus/crypto/randomUUID'

Returns a random UUID (version 4, variant 1), filled from CSPRNG.

This contains 122 bits of randomness.

Compatible with Crypto.randomUUID().

await hash(type, arg[, form])

import { hash } from '@exodus/crypto/hash'

Hashes arg using the hash specified as type.

Returns the result as encoded as form (e.g. 'hex') or as a Buffer instance if form is not specified.

E.g.:

> await hash('sha256', 'abc', 'hex')
'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad'
> await hash('sha256', Buffer.from('abc'), 'hex')
'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad'
> await hash('sha256', new Uint8Array([97, 98, 99]), 'hex')
'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad'
await hash('sha256', Buffer.from('abc'))
Buffer(32) [186, 120, 22, 191, 143, 1, 207, 234, 65, 65, 64, 222, 93, 174, 34, 35, 176, 3, 97, 163, 150, 23, 122, 156, 180, 16, 255, 97, 242, 0, 21, 173]

await hmac(type, secret, arg[, form])

import { hmac } from '@exodus/crypto/hmac'

HMAC implementation, usage similar to hash().

Empty secret values are not supported.