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41fb13c3 C |
1 | import { compare, genSalt, hash } from 'bcrypt' |
2 | import { createSign, createVerify } from 'crypto' | |
41f2ebae | 3 | import { Request } from 'express' |
41fb13c3 | 4 | import { cloneDeep } from 'lodash' |
f304a158 | 5 | import { sha256 } from '@shared/extra-utils' |
74dc3bca | 6 | import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants' |
41fb13c3 | 7 | import { MActor } from '../types/models' |
06aad801 | 8 | import { createPrivateKey, getPublicKey, promisify1, promisify2 } from './core-utils' |
ad513607 | 9 | import { jsonld } from './custom-jsonld-signature' |
8d468a16 | 10 | import { logger } from './logger' |
8d2be0ed | 11 | |
41fb13c3 C |
12 | const bcryptComparePromise = promisify2<any, string, boolean>(compare) |
13 | const bcryptGenSaltPromise = promisify1<number, string>(genSalt) | |
14 | const bcryptHashPromise = promisify2<any, string | number, string>(hash) | |
9f10b292 | 15 | |
5842a854 | 16 | const httpSignature = require('@peertube/http-signature') |
41f2ebae | 17 | |
e4f97bab C |
18 | async function createPrivateAndPublicKeys () { |
19 | logger.info('Generating a RSA key...') | |
bdfbd4f1 | 20 | |
e4f97bab C |
21 | const { key } = await createPrivateKey(PRIVATE_RSA_KEY_SIZE) |
22 | const { publicKey } = await getPublicKey(key) | |
bdfbd4f1 | 23 | |
e4f97bab | 24 | return { privateKey: key, publicKey } |
9f10b292 C |
25 | } |
26 | ||
41f2ebae C |
27 | // User password checks |
28 | ||
29 | function comparePassword (plainPassword: string, hashPassword: string) { | |
30 | return bcryptComparePromise(plainPassword, hashPassword) | |
31 | } | |
32 | ||
33 | async function cryptPassword (password: string) { | |
34 | const salt = await bcryptGenSaltPromise(BCRYPT_SALT_SIZE) | |
35 | ||
36 | return bcryptHashPromise(password, salt) | |
37 | } | |
38 | ||
39 | // HTTP Signature | |
40 | ||
df66d815 C |
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'] | |
44 | } | |
45 | ||
46 | return true | |
47 | } | |
48 | ||
453e83ea | 49 | function isHTTPSignatureVerified (httpSignatureParsed: any, actor: MActor): boolean { |
41f2ebae C |
50 | return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true |
51 | } | |
52 | ||
df66d815 | 53 | function parseHTTPSignature (req: Request, clockSkew?: number) { |
797d05bd C |
54 | const headers = req.method === 'POST' |
55 | ? HTTP_SIGNATURE.REQUIRED_HEADERS.POST | |
56 | : HTTP_SIGNATURE.REQUIRED_HEADERS.ALL | |
57 | ||
58 | return httpSignature.parse(req, { clockSkew, headers }) | |
41f2ebae C |
59 | } |
60 | ||
61 | // JSONLD | |
62 | ||
ad513607 | 63 | function isJsonLDSignatureVerified (fromActor: MActor, signedDocument: any): Promise<boolean> { |
df66d815 | 64 | if (signedDocument.signature.type === 'RsaSignature2017') { |
ad513607 | 65 | return isJsonLDRSA2017Verified(fromActor, signedDocument) |
df66d815 C |
66 | } |
67 | ||
ad513607 | 68 | logger.warn('Unknown JSON LD signature %s.', signedDocument.signature.type, signedDocument) |
bdfbd4f1 | 69 | |
ad513607 | 70 | return Promise.resolve(false) |
26d7d31b C |
71 | } |
72 | ||
df66d815 | 73 | // Backward compatibility with "other" implementations |
453e83ea | 74 | async function isJsonLDRSA2017Verified (fromActor: MActor, signedDocument: any) { |
df66d815 | 75 | const [ documentHash, optionsHash ] = await Promise.all([ |
ad513607 C |
76 | createDocWithoutSignatureHash(signedDocument), |
77 | createSignatureHash(signedDocument.signature) | |
df66d815 C |
78 | ]) |
79 | ||
80 | const toVerify = optionsHash + documentHash | |
81 | ||
82 | const verify = createVerify('RSA-SHA256') | |
83 | verify.update(toVerify, 'utf8') | |
84 | ||
85 | return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64') | |
86 | } | |
87 | ||
db4b15f2 | 88 | async function signJsonLDObject <T> (byActor: MActor, data: T) { |
ad513607 C |
89 | const signature = { |
90 | type: 'RsaSignature2017', | |
ce33ee01 | 91 | creator: byActor.url, |
ad513607 | 92 | created: new Date().toISOString() |
f5028693 | 93 | } |
9f10b292 | 94 | |
ad513607 C |
95 | const [ documentHash, optionsHash ] = await Promise.all([ |
96 | createDocWithoutSignatureHash(data), | |
97 | createSignatureHash(signature) | |
98 | ]) | |
99 | ||
100 | const toSign = optionsHash + documentHash | |
101 | ||
102 | const sign = createSign('RSA-SHA256') | |
103 | sign.update(toSign, 'utf8') | |
104 | ||
105 | const signatureValue = sign.sign(byActor.privateKey, 'base64') | |
106 | Object.assign(signature, { signatureValue }) | |
107 | ||
108 | return Object.assign(data, { signature }) | |
e4f97bab C |
109 | } |
110 | ||
8dc8a34e C |
111 | function buildDigest (body: any) { |
112 | const rawBody = typeof body === 'string' ? body : JSON.stringify(body) | |
113 | ||
114 | return 'SHA-256=' + sha256(rawBody, 'base64') | |
115 | } | |
116 | ||
9f10b292 | 117 | // --------------------------------------------------------------------------- |
dac0a531 | 118 | |
65fcc311 | 119 | export { |
df66d815 | 120 | isHTTPSignatureDigestValid, |
41f2ebae C |
121 | parseHTTPSignature, |
122 | isHTTPSignatureVerified, | |
8dc8a34e | 123 | buildDigest, |
41f2ebae | 124 | isJsonLDSignatureVerified, |
65fcc311 | 125 | comparePassword, |
e4f97bab | 126 | createPrivateAndPublicKeys, |
65fcc311 | 127 | cryptPassword, |
41f2ebae | 128 | signJsonLDObject |
9f10b292 | 129 | } |
8d2be0ed C |
130 | |
131 | // --------------------------------------------------------------------------- | |
ad513607 | 132 | |
41fb13c3 | 133 | function hashObject (obj: any): Promise<any> { |
ad513607 C |
134 | return jsonld.promises |
135 | .normalize(obj, { | |
136 | algorithm: 'URDNA2015', | |
137 | format: 'application/n-quads' | |
138 | }) | |
139 | .then(res => sha256(res)) | |
140 | } | |
141 | ||
142 | function createSignatureHash (signature: any) { | |
143 | const signatureCopy = cloneDeep(signature) | |
144 | Object.assign(signatureCopy, { | |
145 | '@context': [ | |
146 | 'https://w3id.org/security/v1', | |
147 | { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' } | |
148 | ] | |
149 | }) | |
150 | ||
151 | delete signatureCopy.type | |
152 | delete signatureCopy.id | |
153 | delete signatureCopy.signatureValue | |
154 | ||
41fb13c3 | 155 | return hashObject(signatureCopy) |
ad513607 C |
156 | } |
157 | ||
158 | function createDocWithoutSignatureHash (doc: any) { | |
159 | const docWithoutSignature = cloneDeep(doc) | |
160 | delete docWithoutSignature.signature | |
161 | ||
41fb13c3 | 162 | return hashObject(docWithoutSignature) |
ad513607 | 163 | } |