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@connectedcars/jwtutils
Advanced tools
Zero dependency JWT encoding and decoding for Node 6.x and 8.x
Features:
Most other JWT implementations tend be complex and have a large array of dependencies because they implement the seldom used JOSE standard. This often makes the whole JWT encoding/decoding complicated and hard to understand, something it really should not be.
So the focus of this module has been to make a simple, secure, fast and flexible set of utility methods to work with JWT's. The code itself is also easy to understand and less than 200 lines of code, making it much easier to security audit the code.
Also note doing your own crypto is a bad idea so this module only deals with the encoding/decoding of the JWT, the underlaying crypto operations are done by Node's build-in crypto api that uses openssl.
Currently only asymmetric encryption algorithms are supported as this would also be the only recommend option for production use.
const { JwtUtils, JwtVerifyError } = require('@connectedcars/jwtutils')
let jwtHeader = {
typ: 'JWT',
alg: 'RS256',
kid: '1'
}
let jwtBody = {
aud: 'https://api.domain.tld',
iss: 'https://auth.domain.tld',
sub: 'subject@domain.tld',
iat: unixNow,
exp: unixNow + 600,
scope: ['http://stuff', 'http://stuff2']
}
// Don't use this key for anything but testing as this is the key from jwt.io
const pemEncodedPrivateKey =
'-----BEGIN RSA PRIVATE KEY-----\n' +
'MIICWwIBAAKBgQDdlatRjRjogo3WojgGHFHYLugdUWAY9iR3fy4arWNA1KoS8kVw\n' +
'33cJibXr8bvwUAUparCwlvdbH6dvEOfou0/gCFQsHUfQrSDv+MuSUMAe8jzKE4qW\n' +
'+jK+xQU9a03GUnKHkkle+Q0pX/g6jXZ7r1/xAK5Do2kQ+X5xK9cipRgEKwIDAQAB\n' +
'AoGAD+onAtVye4ic7VR7V50DF9bOnwRwNXrARcDhq9LWNRrRGElESYYTQ6EbatXS\n' +
'3MCyjjX2eMhu/aF5YhXBwkppwxg+EOmXeh+MzL7Zh284OuPbkglAaGhV9bb6/5Cp\n' +
'uGb1esyPbYW+Ty2PC0GSZfIXkXs76jXAu9TOBvD0ybc2YlkCQQDywg2R/7t3Q2OE\n' +
'2+yo382CLJdrlSLVROWKwb4tb2PjhY4XAwV8d1vy0RenxTB+K5Mu57uVSTHtrMK0\n' +
'GAtFr833AkEA6avx20OHo61Yela/4k5kQDtjEf1N0LfI+BcWZtxsS3jDM3i1Hp0K\n' +
'Su5rsCPb8acJo5RO26gGVrfAsDcIXKC+bQJAZZ2XIpsitLyPpuiMOvBbzPavd4gY\n' +
'6Z8KWrfYzJoI/Q9FuBo6rKwl4BFoToD7WIUS+hpkagwWiz+6zLoX1dbOZwJACmH5\n' +
'fSSjAkLRi54PKJ8TFUeOP15h9sQzydI8zJU+upvDEKZsZc/UhT/SySDOxQ4G/523\n' +
'Y0sz/OZtSWcol/UMgQJALesy++GdvoIDLfJX5GBQpuFgFenRiRDabxrE9MNUZ2aP\n' +
'FaFp+DyAe+b4nDwuJaW2LURbr8AEZga7oQj0uYxcYw==\n' +
'-----END RSA PRIVATE KEY-----'
// let jwt = JwtUtils.encode(pemEncodedPrivateKey, jwtHeader, jwtBody, privateKeyPassword)
let jwt = JwtUtils.encode(pemEncodedPrivateKey, jwtHeader, jwtBody)
// Don't use this key for anything but testing as this is the key from jwt.io
const publicKey =
'-----BEGIN PUBLIC KEY-----\n' +
'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdlatRjRjogo3WojgGHFHYLugd\n' +
'UWAY9iR3fy4arWNA1KoS8kVw33cJibXr8bvwUAUparCwlvdbH6dvEOfou0/gCFQs\n' +
'HUfQrSDv+MuSUMAe8jzKE4qW+jK+xQU9a03GUnKHkkle+Q0pX/g6jXZ7r1/xAK5D\n' +
'o2kQ+X5xK9cipRgEKwIDAQAB\n' +
'-----END PUBLIC KEY-----'
const allowedAudinces = ['https://api.domain.tld']
const pubKeys = {
'https://auth.domain.tld': {
'1@RS256': publicKey,
'default@RS256': publicKey // Will default to this key if the header does not have a kid
}
}
try {
let decodedJwtBody = JwtUtils.decode(jwt, pubKeys, allowedAudinces)
} catch (e) {
if (e instanceof JwtVerifyError) {
// Can be returned to user
} else {
// Should not be returned to user
console.error(e)
}
}
const express = require('express')
const { JwtAuthMiddleware, JwtVerifyError } = require('@connectedcars/jwtutils')
// Configuration
const audiences = ['https://api.domain.tld']
const pubKeys = {
'https://auth.domain.tld': {
'1@RS256': publicKey // Fx. use key from before
}
}
const app = express()
// Register the middleware
app.use(JwtAuthMiddleware(pubKeys, audiences))
// Register an error handler to return 401 errors
app.use((err, req, res, next) => {
if (err instanceof JwtVerifyError) {
if (err.innerError) {
console.error(`Failed with: ${err.innerError.message}`)
}
res.status(401).send(err.message)
} else {
res.status(500).send('Unknown error')
}
})
app.get('/', (req, res) => {
res.send(`Hello ${req.user.subject}`)
})
app.listen(3000, () => {
console.log('Example app listening on port 3000!')
})
Generate private RSA key:
# Here the key is encrypted with aes256
openssl genrsa -aes256 -out private.pem 2048
Generate public key from private key:
openssl rsa -in private.pem -outform PEM -pubout -out public.pem
FAQs
Zero dependency JWT encoding/decoding for Node
The npm package @connectedcars/jwtutils receives a total of 38 weekly downloads. As such, @connectedcars/jwtutils popularity was classified as not popular.
We found that @connectedcars/jwtutils demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 13 open source maintainers collaborating on the project.
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