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 { bcryptComparePromise, bcryptGenSaltPromise, bcryptHashPromise, createPrivateKey, getPublicKey, 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'
11 const httpSignature = require('http-signature')
13 async function createPrivateAndPublicKeys () {
14 logger.info('Generating a RSA key...')
16 const { key } = await createPrivateKey(PRIVATE_RSA_KEY_SIZE)
17 const { publicKey } = await getPublicKey(key)
19 return { privateKey: key, publicKey }
22 // User password checks
24 function comparePassword (plainPassword: string, hashPassword: string) {
25 return bcryptComparePromise(plainPassword, hashPassword)
28 async function cryptPassword (password: string) {
29 const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE)
31 return bcryptHashPromise(password, salt)
36 function isHTTPSignatureDigestValid (rawBody: Buffer, req: Request): boolean {
37 if (req.headers[HTTP_SIGNATURE.HEADER_NAME] && req.headers['digest']) {
38 return buildDigest(rawBody.toString()) === req.headers['digest']
44 function isHTTPSignatureVerified (httpSignatureParsed: any, actor: ActorModel): boolean {
45 return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
48 function parseHTTPSignature (req: Request, clockSkew?: number) {
49 return httpSignature.parse(req, { authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME, clockSkew })
54 async function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any): Promise<boolean> {
55 if (signedDocument.signature.type === 'RsaSignature2017') {
57 const res = await isJsonLDRSA2017Verified(fromActor, signedDocument)
58 // Success? If no, try with our library
59 if (res === true) return true
62 const publicKeyObject = {
63 '@context': jsig.SECURITY_CONTEXT_URL,
65 type: 'CryptographicKey',
67 publicKeyPem: fromActor.publicKey
70 const publicKeyOwnerObject = {
71 '@context': jsig.SECURITY_CONTEXT_URL,
73 publicKey: [ publicKeyObject ]
77 publicKey: publicKeyObject,
78 publicKeyOwner: publicKeyOwnerObject
82 .verify(signedDocument, options)
83 .then((result: { verified: boolean }) => result.verified)
85 logger.error('Cannot check signature.', { err })
90 // Backward compatibility with "other" implementations
91 async function isJsonLDRSA2017Verified (fromActor: ActorModel, signedDocument: any) {
92 function hash (obj: any): Promise<any> {
93 return jsonld.promises
95 algorithm: 'URDNA2015',
96 format: 'application/n-quads'
98 .then(res => sha256(res))
101 const signatureCopy = cloneDeep(signedDocument.signature)
102 Object.assign(signatureCopy, {
104 'https://w3id.org/security/v1',
105 { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' }
108 delete signatureCopy.type
109 delete signatureCopy.id
110 delete signatureCopy.signatureValue
112 const docWithoutSignature = cloneDeep(signedDocument)
113 delete docWithoutSignature.signature
115 const [ documentHash, optionsHash ] = await Promise.all([
116 hash(docWithoutSignature),
120 const toVerify = optionsHash + documentHash
122 const verify = createVerify('RSA-SHA256')
123 verify.update(toVerify, 'utf8')
125 return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
128 function signJsonLDObject (byActor: ActorModel, data: any) {
130 privateKeyPem: byActor.privateKey,
131 creator: byActor.url,
132 algorithm: 'RsaSignature2017'
135 return jsig.promises.sign(data, options)
138 // ---------------------------------------------------------------------------
141 isHTTPSignatureDigestValid,
143 isHTTPSignatureVerified,
144 isJsonLDSignatureVerified,
146 createPrivateAndPublicKeys,