Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/jose/lib/jwa/rsaes.js

@@ -0,0 +1,67 @@
+const { publicEncrypt, privateDecrypt, constants } = require('crypto')
+
+const { oaepHashSupported } = require('../help/runtime_support')
+const { KEYOBJECT } = require('../help/consts')
+const { asInput } = require('../help/key_object')
+
+const resolvePadding = (alg) => {
+  switch (alg) {
+    case 'RSA-OAEP':
+    case 'RSA-OAEP-256':
+    case 'RSA-OAEP-384':
+    case 'RSA-OAEP-512':
+      return constants.RSA_PKCS1_OAEP_PADDING
+    case 'RSA1_5':
+      return constants.RSA_PKCS1_PADDING
+  }
+}
+
+const resolveOaepHash = (alg) => {
+  switch (alg) {
+    case 'RSA-OAEP':
+      return 'sha1'
+    case 'RSA-OAEP-256':
+      return 'sha256'
+    case 'RSA-OAEP-384':
+      return 'sha384'
+    case 'RSA-OAEP-512':
+      return 'sha512'
+    default:
+      return undefined
+  }
+}
+
+const wrapKey = (padding, oaepHash, { [KEYOBJECT]: keyObject }, payload) => {
+  const key = asInput(keyObject, true)
+  return { wrapped: publicEncrypt({ key, oaepHash, padding }, payload) }
+}
+
+const unwrapKey = (padding, oaepHash, { [KEYOBJECT]: keyObject }, payload) => {
+  const key = asInput(keyObject, false)
+  return privateDecrypt({ key, oaepHash, padding }, payload)
+}
+
+const LENGTHS = {
+  RSA1_5: 0,
+  'RSA-OAEP': 592,
+  'RSA-OAEP-256': 784,
+  'RSA-OAEP-384': 1040,
+  'RSA-OAEP-512': 1296
+}
+
+module.exports = (JWA, JWK) => {
+  const algs = ['RSA-OAEP', 'RSA1_5']
+
+  if (oaepHashSupported) {
+    algs.splice(1, 0, 'RSA-OAEP-256', 'RSA-OAEP-384', 'RSA-OAEP-512')
+  }
+
+  algs.forEach((jwaAlg) => {
+    const padding = resolvePadding(jwaAlg)
+    const oaepHash = resolveOaepHash(jwaAlg)
+    JWA.keyManagementEncrypt.set(jwaAlg, wrapKey.bind(undefined, padding, oaepHash))
+    JWA.keyManagementDecrypt.set(jwaAlg, unwrapKey.bind(undefined, padding, oaepHash))
+    JWK.RSA.wrapKey[jwaAlg] = key => (key.use === 'enc' || key.use === undefined) && key.length >= LENGTHS[jwaAlg]
+    JWK.RSA.unwrapKey[jwaAlg] = key => key.private && (key.use === 'enc' || key.use === undefined) && key.length >= LENGTHS[jwaAlg]
+  })
+}