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peertube/server/middlewares/secure.ts

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import 'express-validator'
import * as express from 'express'
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import { database as db } from '../initializers'
import {
logger,
checkSignature as peertubeCryptoCheckSignature
} from '../helpers'
import { PodSignature } from '../../shared'
async function checkSignature (req: express.Request, res: express.Response, next: express.NextFunction) {
const signatureObject: PodSignature = req.body.signature
const host = signatureObject.host
try {
const pod = await db.Pod.loadByHost(host)
if (pod === null) {
logger.error('Unknown pod %s.', host)
return res.sendStatus(403)
}
logger.debug('Checking signature from %s.', host)
let signatureShouldBe
// If there is data in the body the sender used it for its signature
// If there is no data we just use its host as signature
if (req.body.data) {
signatureShouldBe = req.body.data
} else {
signatureShouldBe = host
}
const signatureOk = peertubeCryptoCheckSignature(pod.publicKey, signatureShouldBe, signatureObject.signature)
if (signatureOk === true) {
res.locals.secure = {
pod
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}
return next()
}
logger.error('Signature is not okay in body for %s.', signatureObject.host)
return res.sendStatus(403)
} catch (err) {
logger.error('Cannot get signed host in body.', { error: err.stack, signature: signatureObject.signature })
return res.sendStatus(500)
}
}
// ---------------------------------------------------------------------------
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export {
checkSignature
}