]>
Commit | Line | Data |
---|---|---|
41f2ebae | 1 | import { Request } from 'express' |
74dc3bca | 2 | import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants' |
8d2be0ed | 3 | import { createPrivateKey, getPublicKey, promisify1, promisify2, sha256 } from './core-utils' |
ad513607 | 4 | import { jsonld } from './custom-jsonld-signature' |
8d468a16 | 5 | import { logger } from './logger' |
df66d815 | 6 | import { cloneDeep } from 'lodash' |
ad513607 | 7 | import { createSign, createVerify } from 'crypto' |
8d2be0ed | 8 | import * as bcrypt from 'bcrypt' |
26d6bf65 | 9 | import { MActor } from '../types/models' |
8d2be0ed C |
10 | |
11 | const bcryptComparePromise = promisify2<any, string, boolean>(bcrypt.compare) | |
12 | const bcryptGenSaltPromise = promisify1<number, string>(bcrypt.genSalt) | |
13 | const bcryptHashPromise = promisify2<any, string | number, string>(bcrypt.hash) | |
9f10b292 | 14 | |
41f2ebae C |
15 | const httpSignature = require('http-signature') |
16 | ||
e4f97bab C |
17 | async function createPrivateAndPublicKeys () { |
18 | logger.info('Generating a RSA key...') | |
bdfbd4f1 | 19 | |
e4f97bab C |
20 | const { key } = await createPrivateKey(PRIVATE_RSA_KEY_SIZE) |
21 | const { publicKey } = await getPublicKey(key) | |
bdfbd4f1 | 22 | |
e4f97bab | 23 | return { privateKey: key, publicKey } |
9f10b292 C |
24 | } |
25 | ||
41f2ebae C |
26 | // User password checks |
27 | ||
28 | function comparePassword (plainPassword: string, hashPassword: string) { | |
29 | return bcryptComparePromise(plainPassword, hashPassword) | |
30 | } | |
31 | ||
32 | async function cryptPassword (password: string) { | |
33 | const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE) | |
34 | ||
35 | return bcryptHashPromise(password, salt) | |
36 | } | |
37 | ||
38 | // HTTP Signature | |
39 | ||
df66d815 C |
40 | function isHTTPSignatureDigestValid (rawBody: Buffer, req: Request): boolean { |
41 | if (req.headers[HTTP_SIGNATURE.HEADER_NAME] && req.headers['digest']) { | |
42 | return buildDigest(rawBody.toString()) === req.headers['digest'] | |
43 | } | |
44 | ||
45 | return true | |
46 | } | |
47 | ||
453e83ea | 48 | function isHTTPSignatureVerified (httpSignatureParsed: any, actor: MActor): boolean { |
41f2ebae C |
49 | return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true |
50 | } | |
51 | ||
df66d815 | 52 | function parseHTTPSignature (req: Request, clockSkew?: number) { |
797d05bd C |
53 | const headers = req.method === 'POST' |
54 | ? HTTP_SIGNATURE.REQUIRED_HEADERS.POST | |
55 | : HTTP_SIGNATURE.REQUIRED_HEADERS.ALL | |
56 | ||
57 | return httpSignature.parse(req, { clockSkew, headers }) | |
41f2ebae C |
58 | } |
59 | ||
60 | // JSONLD | |
61 | ||
ad513607 | 62 | function isJsonLDSignatureVerified (fromActor: MActor, signedDocument: any): Promise<boolean> { |
df66d815 | 63 | if (signedDocument.signature.type === 'RsaSignature2017') { |
ad513607 | 64 | return isJsonLDRSA2017Verified(fromActor, signedDocument) |
df66d815 C |
65 | } |
66 | ||
ad513607 | 67 | logger.warn('Unknown JSON LD signature %s.', signedDocument.signature.type, signedDocument) |
bdfbd4f1 | 68 | |
ad513607 | 69 | return Promise.resolve(false) |
26d7d31b C |
70 | } |
71 | ||
df66d815 | 72 | // Backward compatibility with "other" implementations |
453e83ea | 73 | async function isJsonLDRSA2017Verified (fromActor: MActor, signedDocument: any) { |
df66d815 | 74 | const [ documentHash, optionsHash ] = await Promise.all([ |
ad513607 C |
75 | createDocWithoutSignatureHash(signedDocument), |
76 | createSignatureHash(signedDocument.signature) | |
df66d815 C |
77 | ]) |
78 | ||
79 | const toVerify = optionsHash + documentHash | |
80 | ||
81 | const verify = createVerify('RSA-SHA256') | |
82 | verify.update(toVerify, 'utf8') | |
83 | ||
84 | return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64') | |
85 | } | |
86 | ||
db4b15f2 | 87 | async function signJsonLDObject <T> (byActor: MActor, data: T) { |
ad513607 C |
88 | const signature = { |
89 | type: 'RsaSignature2017', | |
ce33ee01 | 90 | creator: byActor.url, |
ad513607 | 91 | created: new Date().toISOString() |
f5028693 | 92 | } |
9f10b292 | 93 | |
ad513607 C |
94 | const [ documentHash, optionsHash ] = await Promise.all([ |
95 | createDocWithoutSignatureHash(data), | |
96 | createSignatureHash(signature) | |
97 | ]) | |
98 | ||
99 | const toSign = optionsHash + documentHash | |
100 | ||
101 | const sign = createSign('RSA-SHA256') | |
102 | sign.update(toSign, 'utf8') | |
103 | ||
104 | const signatureValue = sign.sign(byActor.privateKey, 'base64') | |
105 | Object.assign(signature, { signatureValue }) | |
106 | ||
107 | return Object.assign(data, { signature }) | |
e4f97bab C |
108 | } |
109 | ||
8dc8a34e C |
110 | function buildDigest (body: any) { |
111 | const rawBody = typeof body === 'string' ? body : JSON.stringify(body) | |
112 | ||
113 | return 'SHA-256=' + sha256(rawBody, 'base64') | |
114 | } | |
115 | ||
9f10b292 | 116 | // --------------------------------------------------------------------------- |
dac0a531 | 117 | |
65fcc311 | 118 | export { |
df66d815 | 119 | isHTTPSignatureDigestValid, |
41f2ebae C |
120 | parseHTTPSignature, |
121 | isHTTPSignatureVerified, | |
8dc8a34e | 122 | buildDigest, |
41f2ebae | 123 | isJsonLDSignatureVerified, |
65fcc311 | 124 | comparePassword, |
e4f97bab | 125 | createPrivateAndPublicKeys, |
65fcc311 | 126 | cryptPassword, |
41f2ebae | 127 | signJsonLDObject |
9f10b292 | 128 | } |
8d2be0ed C |
129 | |
130 | // --------------------------------------------------------------------------- | |
ad513607 C |
131 | |
132 | function hash (obj: any): Promise<any> { | |
133 | return jsonld.promises | |
134 | .normalize(obj, { | |
135 | algorithm: 'URDNA2015', | |
136 | format: 'application/n-quads' | |
137 | }) | |
138 | .then(res => sha256(res)) | |
139 | } | |
140 | ||
141 | function createSignatureHash (signature: any) { | |
142 | const signatureCopy = cloneDeep(signature) | |
143 | Object.assign(signatureCopy, { | |
144 | '@context': [ | |
145 | 'https://w3id.org/security/v1', | |
146 | { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' } | |
147 | ] | |
148 | }) | |
149 | ||
150 | delete signatureCopy.type | |
151 | delete signatureCopy.id | |
152 | delete signatureCopy.signatureValue | |
153 | ||
154 | return hash(signatureCopy) | |
155 | } | |
156 | ||
157 | function createDocWithoutSignatureHash (doc: any) { | |
158 | const docWithoutSignature = cloneDeep(doc) | |
159 | delete docWithoutSignature.signature | |
160 | ||
161 | return hash(docWithoutSignature) | |
162 | } |