Removing dependency on base64url module

Author: rossphelan

lib/mcapi/crypto/jwe-crypto.js

@@ -2,7 +2,6 @@ const forge = require('node-forge');
 const fs = require('fs');
 const utils = require('../utils/utils');
 const nodeCrypto = require('crypto');
-const base64url = require('base64url');
 
 /**
  * @class JWE Crypto
@@ -41,7 +40,7 @@ function JweCrypto(config) {
       "enc": "A256GCM"
     };
 
-    const encodedJweHeader = base64url.encode(JSON.stringify(jweHeader));
+    const encodedJweHeader = Buffer.from(JSON.stringify(jweHeader)).toString('base64url');
 
     const secretKey = nodeCrypto.randomBytes(32);
     const secretKeyBuffer = Buffer.from(secretKey, 'binary');
@@ -63,10 +62,10 @@ function JweCrypto(config) {
     cipherText += cipher.final('base64');
     const authTag = cipher.getAuthTag().toString("base64");
 
-    const encodedEncryptedSecretKey = base64url.encode(encryptedSecretKey, 'binary');
-    const encodedIv = base64url.encode(iv, 'binary');
-    const encodedEncryptedText = base64url.encode(cipherText, "base64");
-    const encodedAuthTag = base64url.encode(authTag, "base64");
+    const encodedEncryptedSecretKey = Buffer.from(encryptedSecretKey, 'binary').toString('base64url');
+    const encodedIv = Buffer.from(iv, 'binary').toString('base64url');
+    const encodedEncryptedText = Buffer.from(cipherText, "base64").toString('base64url');
+    const encodedAuthTag = Buffer.from(authTag, "base64").toString('base64url');
 
     const encryptedData = serialize(encodedJweHeader, encodedEncryptedSecretKey, encodedIv, encodedEncryptedText, encodedAuthTag);
     return { [this.encryptedValueFieldName] : encryptedData};
@@ -84,7 +83,7 @@ function JweCrypto(config) {
     }
 
     const jweTokenParts = deSerialize(encryptedData);
-    const jweHeader = base64url.decode(jweTokenParts[0]);
+    const jweHeader = Buffer.from(jweTokenParts[0], 'base64url').toString('utf8');
     const encryptedSecretKey = Buffer.from(jweTokenParts[1], 'base64url');
     const iv = Buffer.from(jweTokenParts[2], 'base64url');
     const encryptedText = Buffer.from(jweTokenParts[3], 'base64url');