server/helpers/custom-jsonld-signature.ts

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