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Simplify verification in nodes with jose #17824

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Nov 1, 2024
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Simplify verification in nodes with jose #17824

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41 changes: 16 additions & 25 deletions src/content/docs/cloudflare-one/identity/authorization-cookie/validating-json.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -252,9 +252,7 @@ if __name__ == '__main__':

```javascript
const express = require('express');
const cookieParser = require('cookie-parser');
const jwksClient = require('jwks-rsa');
const jwt = require('jsonwebtoken');
const jose = require('jose');

// The Application Audience (AUD) tag for your application
const AUD = process.env.POLICY_AUD;
Expand All @@ -263,44 +261,37 @@ const AUD = process.env.POLICY_AUD;
const TEAM_DOMAIN = process.env.TEAM_DOMAIN;
const CERTS_URL = `${TEAM_DOMAIN}/cdn-cgi/access/certs`;

const client = jwksClient({
jwksUri: CERTS_URL
});

const getKey = (header, callback) => {
client.getSigningKey(header.kid, function(err, key) {
callback(err, key?.getPublicKey());
});
}
const JWKS = jose.createRemoteJWKSet(new URL(CERTS_URL));

// verifyToken is a middleware to verify a CF authorization token
const verifyToken = (req, res, next) => {
const token = req.cookies['CF_Authorization'];
const verifyToken = async (req, res, next) => {
const token = req.headers['cf-access-jwt-assertion'];

// Make sure that the incoming request has our token header
if (!token) {
return res.status(403).send({ status: false, message: 'missing required cf authorization token' });
return res.status(403).send({
status: false,
message: 'missing required cf authorization token',
});
}

jwt.verify(token, getKey, { audience: AUD }, (err, decoded) => {
if (err) {
return res.status(403).send({ status: false, message: 'invalid token' });
}

req.user = decoded;
next();
const result = await jose.jwtVerify(token, JWKS, {
issuer: TEAM_DOMAIN,
audience: AUD,
});
}

req.user = result.payload;
next();
};

const app = express();

app.use(cookieParser());
app.use(verifyToken);

app.get('/', (req, res) => {
res.send('Hello World!');
});

app.listen(3333)
app.listen(3333);

```
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