1 import { Request } from 'express'
2 import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants'
3 import { createPrivateKey, getPublicKey, promisify1, promisify2, sha256 } from './core-utils'
4 import { jsonld } from './custom-jsonld-signature'
5 import { logger } from './logger'
6 import { cloneDeep } from 'lodash'
7 import { createSign, createVerify } from 'crypto'
8 import { buildDigest } from '../lib/job-queue/handlers/utils/activitypub-http-utils'
9 import * as bcrypt from 'bcrypt'
10 import { MActor } from '../typings/models'
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: MActor): 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 function isJsonLDSignatureVerified (fromActor: MActor, signedDocument: any): Promise<boolean> {
60 if (signedDocument.signature.type === 'RsaSignature2017') {
61 return isJsonLDRSA2017Verified(fromActor, signedDocument)
64 logger.warn('Unknown JSON LD signature %s.', signedDocument.signature.type, signedDocument)
66 return Promise.resolve(false)
69 // Backward compatibility with "other" implementations
70 async function isJsonLDRSA2017Verified (fromActor: MActor, signedDocument: any) {
71 const [ documentHash, optionsHash ] = await Promise.all([
72 createDocWithoutSignatureHash(signedDocument),
73 createSignatureHash(signedDocument.signature)
76 const toVerify = optionsHash + documentHash
78 const verify = createVerify('RSA-SHA256')
79 verify.update(toVerify, 'utf8')
81 return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
84 async function signJsonLDObject (byActor: MActor, data: any) {
86 type: 'RsaSignature2017',
88 created: new Date().toISOString()
91 const [ documentHash, optionsHash ] = await Promise.all([
92 createDocWithoutSignatureHash(data),
93 createSignatureHash(signature)
96 const toSign = optionsHash + documentHash
98 const sign = createSign('RSA-SHA256')
99 sign.update(toSign, 'utf8')
101 const signatureValue = sign.sign(byActor.privateKey, 'base64')
102 Object.assign(signature, { signatureValue })
104 return Object.assign(data, { signature })
107 // ---------------------------------------------------------------------------
110 isHTTPSignatureDigestValid,
112 isHTTPSignatureVerified,
113 isJsonLDSignatureVerified,
115 createPrivateAndPublicKeys,
120 // ---------------------------------------------------------------------------
122 function hash (obj: any): Promise<any> {
123 return jsonld.promises
125 algorithm: 'URDNA2015',
126 format: 'application/n-quads'
128 .then(res => sha256(res))
131 function createSignatureHash (signature: any) {
132 const signatureCopy = cloneDeep(signature)
133 Object.assign(signatureCopy, {
135 'https://w3id.org/security/v1',
136 { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' }
140 delete signatureCopy.type
141 delete signatureCopy.id
142 delete signatureCopy.signatureValue
144 return hash(signatureCopy)
147 function createDocWithoutSignatureHash (doc: any) {
148 const docWithoutSignature = cloneDeep(doc)
149 delete docWithoutSignature.signature
151 return hash(docWithoutSignature)