1 import { Request } from 'express'
2 import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants'
3 import { ActorModel } from '../models/activitypub/actor'
4 import { createPrivateKey, getPublicKey, promisify1, promisify2, sha256 } from './core-utils'
5 import { jsig, jsonld } from './custom-jsonld-signature'
6 import { logger } from './logger'
7 import { cloneDeep } from 'lodash'
8 import { createVerify } from 'crypto'
9 import { buildDigest } from '../lib/job-queue/handlers/utils/activitypub-http-utils'
10 import * as bcrypt from 'bcrypt'
12 const bcryptComparePromise = promisify2<any, string, boolean>(bcrypt.compare)
13 const bcryptGenSaltPromise = promisify1<number, string>(bcrypt.genSalt)
14 const bcryptHashPromise = promisify2<any, string | number, string>(bcrypt.hash)
16 const httpSignature = require('http-signature')
18 async function createPrivateAndPublicKeys () {
19 logger.info('Generating a RSA key...')
21 const { key } = await createPrivateKey(PRIVATE_RSA_KEY_SIZE)
22 const { publicKey } = await getPublicKey(key)
24 return { privateKey: key, publicKey }
27 // User password checks
29 function comparePassword (plainPassword: string, hashPassword: string) {
30 return bcryptComparePromise(plainPassword, hashPassword)
33 async function cryptPassword (password: string) {
34 const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE)
36 return bcryptHashPromise(password, salt)
41 function isHTTPSignatureDigestValid (rawBody: Buffer, req: Request): boolean {
42 if (req.headers[HTTP_SIGNATURE.HEADER_NAME] && req.headers['digest']) {
43 return buildDigest(rawBody.toString()) === req.headers['digest']
49 function isHTTPSignatureVerified (httpSignatureParsed: any, actor: ActorModel): boolean {
50 return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
53 function parseHTTPSignature (req: Request, clockSkew?: number) {
54 return httpSignature.parse(req, { authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME, clockSkew })
59 async function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any): Promise<boolean> {
60 if (signedDocument.signature.type === 'RsaSignature2017') {
62 const res = await isJsonLDRSA2017Verified(fromActor, signedDocument)
63 // Success? If no, try with our library
64 if (res === true) return true
67 const publicKeyObject = {
68 '@context': jsig.SECURITY_CONTEXT_URL,
70 type: 'CryptographicKey',
72 publicKeyPem: fromActor.publicKey
75 const publicKeyOwnerObject = {
76 '@context': jsig.SECURITY_CONTEXT_URL,
78 publicKey: [ publicKeyObject ]
82 publicKey: publicKeyObject,
83 publicKeyOwner: publicKeyOwnerObject
87 .verify(signedDocument, options)
88 .then((result: { verified: boolean }) => result.verified)
90 logger.error('Cannot check signature.', { err })
95 // Backward compatibility with "other" implementations
96 async function isJsonLDRSA2017Verified (fromActor: ActorModel, signedDocument: any) {
97 function hash (obj: any): Promise<any> {
98 return jsonld.promises
100 algorithm: 'URDNA2015',
101 format: 'application/n-quads'
103 .then(res => sha256(res))
106 const signatureCopy = cloneDeep(signedDocument.signature)
107 Object.assign(signatureCopy, {
109 'https://w3id.org/security/v1',
110 { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' }
113 delete signatureCopy.type
114 delete signatureCopy.id
115 delete signatureCopy.signatureValue
117 const docWithoutSignature = cloneDeep(signedDocument)
118 delete docWithoutSignature.signature
120 const [ documentHash, optionsHash ] = await Promise.all([
121 hash(docWithoutSignature),
125 const toVerify = optionsHash + documentHash
127 const verify = createVerify('RSA-SHA256')
128 verify.update(toVerify, 'utf8')
130 return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
133 function signJsonLDObject (byActor: ActorModel, data: any) {
135 privateKeyPem: byActor.privateKey,
136 creator: byActor.url,
137 algorithm: 'RsaSignature2017'
140 return jsig.promises.sign(data, options)
143 // ---------------------------------------------------------------------------
146 isHTTPSignatureDigestValid,
148 isHTTPSignatureVerified,
149 isJsonLDSignatureVerified,
151 createPrivateAndPublicKeys,
156 // ---------------------------------------------------------------------------