server/helpers/custom-jsonld-signature.ts

   1 import * as AsyncLRU from 'async-lru'
   2 import * as jsonld from 'jsonld'
   3 import * as jsig from 'jsonld-signatures'
   4 import { logger } from './logger'
   5
   6 const CACHE = {
   7   'https://w3id.org/security/v1': {
   8     '@context': {
   9       'id': '@id',
  10       'type': '@type',
  11
  12       'dc': 'http://purl.org/dc/terms/',
  13       'sec': 'https://w3id.org/security#',
  14       'xsd': 'http://www.w3.org/2001/XMLSchema#',
  15
  16       'EcdsaKoblitzSignature2016': 'sec:EcdsaKoblitzSignature2016',
  17       'Ed25519Signature2018': 'sec:Ed25519Signature2018',
  18       'EncryptedMessage': 'sec:EncryptedMessage',
  19       'GraphSignature2012': 'sec:GraphSignature2012',
  20       'LinkedDataSignature2015': 'sec:LinkedDataSignature2015',
  21       'LinkedDataSignature2016': 'sec:LinkedDataSignature2016',
  22       'CryptographicKey': 'sec:Key',
  23
  24       'authenticationTag': 'sec:authenticationTag',
  25       'canonicalizationAlgorithm': 'sec:canonicalizationAlgorithm',
  26       'cipherAlgorithm': 'sec:cipherAlgorithm',
  27       'cipherData': 'sec:cipherData',
  28       'cipherKey': 'sec:cipherKey',
  29       'created': { '@id': 'dc:created', '@type': 'xsd:dateTime' },
  30       'creator': { '@id': 'dc:creator', '@type': '@id' },
  31       'digestAlgorithm': 'sec:digestAlgorithm',
  32       'digestValue': 'sec:digestValue',
  33       'domain': 'sec:domain',
  34       'encryptionKey': 'sec:encryptionKey',
  35       'expiration': { '@id': 'sec:expiration', '@type': 'xsd:dateTime' },
  36       'expires': { '@id': 'sec:expiration', '@type': 'xsd:dateTime' },
  37       'initializationVector': 'sec:initializationVector',
  38       'iterationCount': 'sec:iterationCount',
  39       'nonce': 'sec:nonce',
  40       'normalizationAlgorithm': 'sec:normalizationAlgorithm',
  41       'owner': { '@id': 'sec:owner', '@type': '@id' },
  42       'password': 'sec:password',
  43       'privateKey': { '@id': 'sec:privateKey', '@type': '@id' },
  44       'privateKeyPem': 'sec:privateKeyPem',
  45       'publicKey': { '@id': 'sec:publicKey', '@type': '@id' },
  46       'publicKeyBase58': 'sec:publicKeyBase58',
  47       'publicKeyPem': 'sec:publicKeyPem',
  48       'publicKeyWif': 'sec:publicKeyWif',
  49       'publicKeyService': { '@id': 'sec:publicKeyService', '@type': '@id' },
  50       'revoked': { '@id': 'sec:revoked', '@type': 'xsd:dateTime' },
  51       'salt': 'sec:salt',
  52       'signature': 'sec:signature',
  53       'signatureAlgorithm': 'sec:signingAlgorithm',
  54       'signatureValue': 'sec:signatureValue'
  55     }
  56   }
  57 }
  58
  59 const nodeDocumentLoader = jsonld.documentLoaders.node()
  60
  61 const lru = new AsyncLRU({
  62   max: 10,
  63   load: (url, cb) => {
  64     if (CACHE[ url ] !== undefined) {
  65       logger.debug('Using cache for JSON-LD %s.', url)
  66
  67       return cb(null, {
  68         contextUrl: null,
  69         document: CACHE[ url ],
  70         documentUrl: url
  71       })
  72     }
  73
  74     nodeDocumentLoader(url, cb)
  75   }
  76 })
  77
  78 jsonld.documentLoader = (url, cb) => {
  79   lru.get(url, cb)
  80 }
  81
  82 jsig.use('jsonld', jsonld)
  83
  84 export { jsig, jsonld }