PeerTube/server/core/helpers/peertube-crypto.ts

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import httpSignature from '@peertube/http-signature'
import { sha256 } from '@peertube/peertube-node-utils'
import { createCipheriv, createDecipheriv } from 'crypto'
import { Request } from 'express'
import { BCRYPT_SALT_SIZE, ENCRYPTION, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers/constants.js'
import { MActor } from '../types/models/index.js'
import { generateRSAKeyPairPromise, randomBytesPromise, scryptPromise } from './core-utils.js'
import { logger } from './logger.js'
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function createPrivateAndPublicKeys () {
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logger.info('Generating a RSA key...')
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return generateRSAKeyPairPromise(PRIVATE_RSA_KEY_SIZE)
}
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// ---------------------------------------------------------------------------
// User password checks
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// ---------------------------------------------------------------------------
async function comparePassword (plainPassword: string, hashPassword: string) {
if (!plainPassword) return false
const { compare } = await import('bcrypt')
return compare(plainPassword, hashPassword)
}
async function cryptPassword (password: string) {
const { genSalt, hash } = await import('bcrypt')
const salt = await genSalt(BCRYPT_SALT_SIZE)
return hash(password, salt)
}
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// ---------------------------------------------------------------------------
// HTTP Signature
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// ---------------------------------------------------------------------------
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
}
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function isHTTPSignatureVerified (httpSignatureParsed: any, actor: MActor): boolean {
return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
}
function parseHTTPSignature (req: Request, clockSkew?: number) {
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const requiredHeaders = req.method === 'POST'
? [ '(request-target)', 'host', 'digest' ]
: [ '(request-target)', 'host' ]
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const parsed = httpSignature.parse(req, { clockSkew, headers: requiredHeaders })
const parsedHeaders = parsed.params.headers
if (!parsedHeaders.includes('date') && !parsedHeaders.includes('(created)')) {
throw new Error(`date or (created) must be included in signature`)
}
return parsed
}
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// ---------------------------------------------------------------------------
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function buildDigest (body: any) {
const rawBody = typeof body === 'string' ? body : JSON.stringify(body)
return 'SHA-256=' + sha256(rawBody, 'base64')
}
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// ---------------------------------------------------------------------------
// Encryption
// ---------------------------------------------------------------------------
async function encrypt (str: string, secret: string) {
const iv = await randomBytesPromise(ENCRYPTION.IV)
const key = await scryptPromise(secret, ENCRYPTION.SALT, 32)
const cipher = createCipheriv(ENCRYPTION.ALGORITHM, key, iv)
let encrypted = iv.toString(ENCRYPTION.ENCODING) + ':'
encrypted += cipher.update(str, 'utf8', ENCRYPTION.ENCODING)
encrypted += cipher.final(ENCRYPTION.ENCODING)
return encrypted
}
async function decrypt (encryptedArg: string, secret: string) {
const [ ivStr, encryptedStr ] = encryptedArg.split(':')
const iv = Buffer.from(ivStr, 'hex')
const key = await scryptPromise(secret, ENCRYPTION.SALT, 32)
const decipher = createDecipheriv(ENCRYPTION.ALGORITHM, key, iv)
return decipher.update(encryptedStr, ENCRYPTION.ENCODING, 'utf8') + decipher.final('utf8')
}
// ---------------------------------------------------------------------------
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export {
isHTTPSignatureDigestValid,
parseHTTPSignature,
isHTTPSignatureVerified,
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buildDigest,
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comparePassword,
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createPrivateAndPublicKeys,
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cryptPassword,
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encrypt,
decrypt
}