import httpSignature from '@peertube/http-signature' import { sha256 } from '@peertube/peertube-node-utils' import { createCipheriv, createDecipheriv, createSign, createVerify } from 'crypto' import { Request } from 'express' import cloneDeep from 'lodash-es/cloneDeep.js' 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' import { assertIsInWorkerThread } from './threads.js' function createPrivateAndPublicKeys () { logger.info('Generating a RSA key...') return generateRSAKeyPairPromise(PRIVATE_RSA_KEY_SIZE) } // --------------------------------------------------------------------------- // User password checks // --------------------------------------------------------------------------- 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) } // --------------------------------------------------------------------------- // 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) { const requiredHeaders = req.method === 'POST' ? [ '(request-target)', 'host', 'digest' ] : [ '(request-target)', 'host' ] 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 } // --------------------------------------------------------------------------- // JSONLD // --------------------------------------------------------------------------- function isJsonLDSignatureVerified (fromActor: MActor, signedDocument: any): Promise { 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 (options: { byActor: { url: string, privateKey: string } data: T disableWorkerThreadAssertion?: boolean }) { const { byActor, data, disableWorkerThreadAssertion = false } = options if (!disableWorkerThreadAssertion) assertIsInWorkerThread() 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') } // --------------------------------------------------------------------------- // 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') } // --------------------------------------------------------------------------- export { isHTTPSignatureDigestValid, parseHTTPSignature, isHTTPSignatureVerified, buildDigest, isJsonLDSignatureVerified, comparePassword, createPrivateAndPublicKeys, cryptPassword, signJsonLDObject, encrypt, decrypt } // --------------------------------------------------------------------------- async function hashObject (obj: any): Promise { const { jsonld } = await import('./custom-jsonld-signature.js') const res = await (jsonld as any).promises.normalize(obj, { safe: false, algorithm: 'URDNA2015', format: 'application/n-quads' }) return 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 hashObject(signatureCopy) } function createDocWithoutSignatureHash (doc: any) { const docWithoutSignature = cloneDeep(doc) delete docWithoutSignature.signature return hashObject(docWithoutSignature) }