1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
import { Request } from 'express'
import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants'
import { createPrivateKey, getPublicKey, promisify1, promisify2, sha256 } from './core-utils'
import { jsonld } from './custom-jsonld-signature'
import { logger } from './logger'
import { cloneDeep } from 'lodash'
import { createSign, createVerify } from 'crypto'
import * as bcrypt from 'bcrypt'
import { MActor } from '../types/models'
const bcryptComparePromise = promisify2<any, string, boolean>(bcrypt.compare)
const bcryptGenSaltPromise = promisify1<number, string>(bcrypt.genSalt)
const bcryptHashPromise = promisify2<any, string | number, string>(bcrypt.hash)
const httpSignature = require('http-signature')
async function createPrivateAndPublicKeys () {
logger.info('Generating a RSA key...')
const { key } = await createPrivateKey(PRIVATE_RSA_KEY_SIZE)
const { publicKey } = await getPublicKey(key)
return { privateKey: key, publicKey }
}
// 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: MActor): boolean {
return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
}
function parseHTTPSignature (req: Request, clockSkew?: number) {
return httpSignature.parse(req, { clockSkew })
}
// JSONLD
function isJsonLDSignatureVerified (fromActor: MActor, signedDocument: any): Promise<boolean> {
if (signedDocument.signature.type === 'RsaSignature2017') {
return isJsonLDRSA2017Verified(fromActor, signedDocument)
}
logger.warn('Unknown JSON LD signature %s.', signedDocument.signature.type, signedDocument)
return Promise.resolve(false)
}
// Backward compatibility with "other" implementations
async function isJsonLDRSA2017Verified (fromActor: MActor, signedDocument: any) {
const [ documentHash, optionsHash ] = await Promise.all([
createDocWithoutSignatureHash(signedDocument),
createSignatureHash(signedDocument.signature)
])
const toVerify = optionsHash + documentHash
const verify = createVerify('RSA-SHA256')
verify.update(toVerify, 'utf8')
return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
}
async function signJsonLDObject (byActor: MActor, data: any) {
const signature = {
type: 'RsaSignature2017',
creator: byActor.url,
created: new Date().toISOString()
}
const [ documentHash, optionsHash ] = await Promise.all([
createDocWithoutSignatureHash(data),
createSignatureHash(signature)
])
const toSign = optionsHash + documentHash
const sign = createSign('RSA-SHA256')
sign.update(toSign, 'utf8')
const signatureValue = sign.sign(byActor.privateKey, 'base64')
Object.assign(signature, { signatureValue })
return Object.assign(data, { signature })
}
function buildDigest (body: any) {
const rawBody = typeof body === 'string' ? body : JSON.stringify(body)
return 'SHA-256=' + sha256(rawBody, 'base64')
}
// ---------------------------------------------------------------------------
export {
isHTTPSignatureDigestValid,
parseHTTPSignature,
isHTTPSignatureVerified,
buildDigest,
isJsonLDSignatureVerified,
comparePassword,
createPrivateAndPublicKeys,
cryptPassword,
signJsonLDObject
}
// ---------------------------------------------------------------------------
function hash (obj: any): Promise<any> {
return jsonld.promises
.normalize(obj, {
algorithm: 'URDNA2015',
format: 'application/n-quads'
})
.then(res => sha256(res))
}
function createSignatureHash (signature: any) {
const signatureCopy = cloneDeep(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
return hash(signatureCopy)
}
function createDocWithoutSignatureHash (doc: any) {
const docWithoutSignature = cloneDeep(doc)
delete docWithoutSignature.signature
return hash(docWithoutSignature)
}
|
