Convert Encryption to ES6

Encryption.js

@@ -2,84 +2,60 @@
 
 var fs     = require('fs');
 var crypto = require('crypto');
-var Base58 = require('bs58');
 
 var algorithm     = 'aes-256-ecb';
-var useEncryption = true;
 
-/* ENCRYPTION / DECRYPTION */
-function encrypt(text, privkey, pubkey) {
-  if(!useEncryption)
-    return text;
-
-  var encrypted;
-  try {
-    var cipher = crypto.createCipher(algorithm, privkey)
-    encrypted  = cipher.update(text, 'utf8', 'hex')
-    encrypted  += cipher.final('hex');
-  } catch(e) {
-    console.log("Error while encrypting:", e, e.stack);
+class Encryption {
+  static encrypt(text, privkey, pubkey) {
+    var encrypted;
+    try {
+      var cipher = crypto.createCipher(algorithm, privkey)
+      encrypted  = cipher.update(text, 'utf8', 'hex')
+      encrypted  += cipher.final('hex');
+    } catch(e) {
+      console.log("Error while encrypting:", e, e.stack);
+    }
+    return encrypted;
   }
-  return encrypted;
-}
 
-function decrypt(text, privkey, pubkey) {
-  if(!useEncryption)
-    return text;
-
-  var decrypted;
-  try {
-    var cipher = crypto.createDecipher(algorithm, privkey)
-    decrypted  = cipher.update(text, 'hex', 'utf8')
-    decrypted  += cipher.final('utf8');
-  } catch(e) {
-    console.log("Error while decrypting:", e, e.stack);
+  static decrypt(text, privkey, pubkey) {
+    var decrypted;
+    try {
+      var cipher = crypto.createDecipher(algorithm, privkey)
+      decrypted  = cipher.update(text, 'hex', 'utf8')
+      decrypted  += cipher.final('utf8');
+    } catch(e) {
+      console.log("Error while decrypting:", e, e.stack);
+    }
+    return decrypted;
   }
-  return decrypted;
-}
 
-/* SIGNING FUNCTIONS */
-function hashWithSHA512(data, salt) {
-  if(!salt) salt = "null";
-  var hash = crypto.createHmac('sha512', salt);
-  hash.update(data);
-  var value = hash.digest('hex');
-  return value;
-}
-
-function sign(data, privkey, seq, salt) {
-  if(!salt) salt = "null";
-  var sign = crypto.createSign('RSA-SHA256');
-  var hash = hashWithSHA512(data, "" + salt)
-  sign.update("" + seq + hash);
-  var sig = sign.sign(privkey, 'hex');
-  return sig;
-}
-
-function verify(data, pubkey, sig, seq, salt) {
-  if(!salt) salt = "null";
-  var verify = crypto.createVerify('RSA-SHA256');
-  var hash   = hashWithSHA512(data, salt);
-  verify.update("" + seq + hash);
-  var verified = verify.verify(pubkey, sig, 'hex');
-  return verified;
-}
-
-/* PUBLIC */
-module.exports = {
-  encrypt: function(payload, privkey, pubkey) {
-    return encrypt(payload, privkey, pubkey);
-  },
-  decrypt: function(payload, privkey, pubkey) {
-    return decrypt(payload, privkey, pubkey);
-  },
-  sign: (data, privateKey, sequenceNumber, salt) => {
-    return sign(data, privateKey, sequenceNumber, salt);
-  },
-  verify: (data, publicKey, signature, sequenceNumber, salt) => {
-    return verify(data, publicKey, signature, sequenceNumber, salt);
-  },
-  hash: (data, salt) => {
-    return hashWithSHA512(data, salt);
+  static hashWithSHA512(data, salt) {
+    if(!salt) salt = "null";
+    var hash = crypto.createHmac('sha512', salt);
+    hash.update(data);
+    var value = hash.digest('hex');
+    return value;
   }
-}
+
+  static sign(data, privkey, seq, salt) {
+    if(!salt) salt = "null";
+    var sign = crypto.createSign('RSA-SHA256');
+    var hash = Encryption.hashWithSHA512(data, "" + salt)
+    sign.update("" + seq + hash);
+    var sig = sign.sign(privkey, 'hex');
+    return sig;
+  }
+
+  static verify(data, pubkey, sig, seq, salt) {
+    if(!salt) salt = "null";
+    var verify = crypto.createVerify('RSA-SHA256');
+    var hash   = Encryption.hashWithSHA512(data, salt);
+    verify.update("" + seq + hash);
+    var verified = verify.verify(pubkey, sig, 'hex');
+    return verified;
+  }
+
+}
+
+module.exports = Encryption;