Merge Complete

Deprecated-Code/UsersModule/server/src/auth/token-decoder.js

@@ -0,0 +1,81 @@
+const MODULE_NAME = 'token-decoder'
+
+/*
+   JSON Web Token (JWT) is a compact, URL-safe means of representing
+   claims to be transferred between two parties.  The claims in a JWT
+   are encoded as a JSON object that is used as the payload of a JSON
+   Web Signature (JWS) structure or as the plaintext of a JSON Web
+   Encryption (JWE) structure, enabling the claims to be digitally
+   signed or integrity protected with a Message Authentication Code
+   (MAC) and/or encrypted.
+*/
+
+const JSONWebToken = require('jsonwebtoken') // A library to deal with JSON Web Tokens.
+const webTokenLibrary = require('jwks-rsa')   // A library to retrieve RSA signing keys from a JWKS (JSON Web Key Set) endpoint.
+
+const decoder = webTokenLibrary({
+  cache: true,
+  rateLimit: true,
+  jwksRequestsPerMinute: 1,
+  jwksUri: `https://${process.env.AUTH0_DOMAIN}/.well-known/jwks.json`
+})
+
+function decodeToken (token, callBackFunction) {
+  try {
+    if (process.env.INFO_LOG === true) { console.log('[INFO] ' + MODULE_NAME + ' -> decodeToken -> Entering function.') }
+
+    const decoded = JSONWebToken.decode(token, { complete: true })
+    const header = decoded.header
+    const payload = decoded.payload
+
+    if (
+      header === null ||
+      header.kid === null ||
+      payload === null
+    ) {
+      if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> Invalid Token. ') }
+      if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> token = ' + token) }
+      callBackFunction(global.DEFAULT_FAIL_RESPONSE)
+      return
+    }
+
+    decoder.getSigningKey(header.kid, onKeyReady)
+
+    function onKeyReady (err, key) {
+      if (process.env.INFO_LOG === true) { console.log('[INFO] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> Entering function.') }
+
+      if (err) {
+        if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> Error getting the key. ') }
+        if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> key = ' + key) }
+        if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> err = ' + err) }
+        callBackFunction(global.DEFAULT_FAIL_RESPONSE)
+        return
+      }
+
+      JSONWebToken.verify(
+        token,
+        key.publicKey,
+        { algorithms: ['RS256'] },
+        onVerified)
+
+      function onVerified (err, decoded) {
+        if (process.env.INFO_LOG === true) { console.log('[INFO] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> onVerified -> Entering function.') }
+
+        if (err) {
+          if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> onVerified -> Error verifying. ') }
+          if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> onVerified -> decoded = ' + decoded) }
+          if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> onKeyReady -> onVerified -> err = ' + err) }
+          callBackFunction(global.DEFAULT_FAIL_RESPONSE)
+          return
+        }
+
+        callBackFunction(global.DEFAULT_OK_RESPONSE, decoded)
+      }
+    }
+  } catch (err) {
+    if (process.env.ERROR_LOG === true) { console.log('[ERROR] ' + MODULE_NAME + ' -> decodeToken -> err = ' + err) }
+    callBackFunction(global.DEFAULT_FAIL_RESPONSE)
+  }
+}
+
+module.exports = decodeToken