-import * as jsonld from 'jsonld'
-import * as jsig from 'jsonld-signatures'
-jsig.use('jsonld', jsonld)
-
-import {
- PRIVATE_RSA_KEY_SIZE,
- BCRYPT_SALT_SIZE
-} from '../initializers'
-import {
- bcryptComparePromise,
- bcryptGenSaltPromise,
- bcryptHashPromise,
- createPrivateKey,
- getPublicKey
-} from './core-utils'
+import { Request } from 'express'
+import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants'
+import { ActorModel } from '../models/activitypub/actor'
+import { bcryptComparePromise, bcryptGenSaltPromise, bcryptHashPromise, createPrivateKey, getPublicKey, sha256 } from './core-utils'
+import { jsig, jsonld } from './custom-jsonld-signature'
import { logger } from './logger'
-import { AccountInstance } from '../models/account/account-interface'
+import { cloneDeep } from 'lodash'
+import { createVerify } from 'crypto'
+import { buildDigest } from '../lib/job-queue/handlers/utils/activitypub-http-utils'
+
+const httpSignature = require('http-signature')
async function createPrivateAndPublicKeys () {
logger.info('Generating a RSA key...')
return { privateKey: key, publicKey }
}
-function isSignatureVerified (fromAccount: AccountInstance, signedDocument: object) {
+// User password checks
+
+function comparePassword (plainPassword: string, hashPassword: string) {
+ return bcryptComparePromise(plainPassword, hashPassword)
+}
+
+async function cryptPassword (password: string) {
+ const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE)
+
+ return bcryptHashPromise(password, salt)
+}
+
+// HTTP Signature
+
+function isHTTPSignatureDigestValid (rawBody: Buffer, req: Request): boolean {
+ if (req.headers[HTTP_SIGNATURE.HEADER_NAME] && req.headers['digest']) {
+ return buildDigest(rawBody.toString()) === req.headers['digest']
+ }
+
+ return true
+}
+
+function isHTTPSignatureVerified (httpSignatureParsed: any, actor: ActorModel): boolean {
+ return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
+}
+
+function parseHTTPSignature (req: Request, clockSkew?: number) {
+ return httpSignature.parse(req, { authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME, clockSkew })
+}
+
+// JSONLD
+
+async function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any): Promise<boolean> {
+ if (signedDocument.signature.type === 'RsaSignature2017') {
+ // Mastodon algorithm
+ const res = await isJsonLDRSA2017Verified(fromActor, signedDocument)
+ // Success? If no, try with our library
+ if (res === true) return true
+ }
+
const publicKeyObject = {
'@context': jsig.SECURITY_CONTEXT_URL,
- '@id': fromAccount.url,
- '@type': 'CryptographicKey',
- owner: fromAccount.url,
- publicKeyPem: fromAccount.publicKey
+ id: fromActor.url,
+ type: 'CryptographicKey',
+ owner: fromActor.url,
+ publicKeyPem: fromActor.publicKey
}
const publicKeyOwnerObject = {
'@context': jsig.SECURITY_CONTEXT_URL,
- '@id': fromAccount.url,
+ id: fromActor.url,
publicKey: [ publicKeyObject ]
}
publicKeyOwner: publicKeyOwnerObject
}
- return jsig.promises.verify(signedDocument, options)
- .catch(err => {
- logger.error('Cannot check signature.', err)
- return false
- })
+ return jsig.promises
+ .verify(signedDocument, options)
+ .then((result: { verified: boolean }) => result.verified)
+ .catch(err => {
+ logger.error('Cannot check signature.', { err })
+ return false
+ })
}
-function signObject (byAccount: AccountInstance, data: any) {
- const options = {
- privateKeyPem: byAccount.privateKey,
- creator: byAccount.url
+// Backward compatibility with "other" implementations
+async function isJsonLDRSA2017Verified (fromActor: ActorModel, signedDocument: any) {
+ function hash (obj: any): Promise<any> {
+ return jsonld.promises
+ .normalize(obj, {
+ algorithm: 'URDNA2015',
+ format: 'application/n-quads'
+ })
+ .then(res => sha256(res))
}
- return jsig.promises.sign(data, options)
-}
+ const signatureCopy = cloneDeep(signedDocument.signature)
+ Object.assign(signatureCopy, {
+ '@context': [
+ 'https://w3id.org/security/v1',
+ { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' }
+ ]
+ })
+ delete signatureCopy.type
+ delete signatureCopy.id
+ delete signatureCopy.signatureValue
-function comparePassword (plainPassword: string, hashPassword: string) {
- return bcryptComparePromise(plainPassword, hashPassword)
+ const docWithoutSignature = cloneDeep(signedDocument)
+ delete docWithoutSignature.signature
+
+ const [ documentHash, optionsHash ] = await Promise.all([
+ hash(docWithoutSignature),
+ hash(signatureCopy)
+ ])
+
+ const toVerify = optionsHash + documentHash
+
+ const verify = createVerify('RSA-SHA256')
+ verify.update(toVerify, 'utf8')
+
+ return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
}
-async function cryptPassword (password: string) {
- const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE)
+function signJsonLDObject (byActor: ActorModel, data: any) {
+ const options = {
+ privateKeyPem: byActor.privateKey,
+ creator: byActor.url,
+ algorithm: 'RsaSignature2017'
+ }
- return bcryptHashPromise(password, salt)
+ return jsig.promises.sign(data, options)
}
// ---------------------------------------------------------------------------
export {
- isSignatureVerified,
+ isHTTPSignatureDigestValid,
+ parseHTTPSignature,
+ isHTTPSignatureVerified,
+ isJsonLDSignatureVerified,
comparePassword,
createPrivateAndPublicKeys,
cryptPassword,
- signObject
+ signJsonLDObject
}