Replace Buffer constructor with static methods

Fixes: ricmoo#68

README.md

@@ -106,9 +106,9 @@ var key_192_array = new Uint8Array(key_192);
 var key_256_array = new Uint8Array(key_256);
 
 // or, you may use Buffer in node.js:
-var key_128_buffer = new Buffer(key_128);
-var key_192_buffer = new Buffer(key_192);
-var key_256_buffer = new Buffer(key_256);
+var key_128_buffer = Buffer.from(key_128);
+var key_192_buffer = Buffer.from(key_192);
+var key_256_buffer = Buffer.from(key_256);
 ```
 
 

test/test-aes.js

@@ -17,20 +17,20 @@ function makeTest(options) {
 
     var plaintext = [];
     for (var i = 0; i < options.plaintext.length; i++) {
-        plaintext.push(new Buffer(options.plaintext[i]));
+        plaintext.push(Buffer.from(options.plaintext[i]));
     }
 
-    var key = new Buffer(options.key);
+    var key = Buffer.from(options.key);
 
     var iv = null;
-    if (options.iv) { iv = new Buffer(options.iv); }
+    if (options.iv) { iv = Buffer.from(options.iv); }
 
     var segmentSize = 0;
     if (options.segmentSize) { segmentSize = options.segmentSize; }
 
     var ciphertext = [];
     for (var i = 0; i < options.encrypted.length; i++) {
-        ciphertext.push(new Buffer(options.encrypted[i]));
+        ciphertext.push(Buffer.from(options.encrypted[i]));
     }
 
 

test/test-buffer.js

@@ -5,7 +5,7 @@ var nodeunit = require('nodeunit');
 var slowCreateBuffer = require('../index')._arrayTest.coerceArray;
 
 var testArray = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
-var testBuffer = new Buffer(testArray);
+var testBuffer = Buffer.from(testArray);
 
 // We mimic some weird non-array-but-sortof-like-an-array object that people on
 // obscure browsers seem to have problems with, for the purpose of testing our

test/test-counter.js

@@ -12,7 +12,7 @@ function bufferEquals(a, b) {
 
 function makeTest (options) {
     return function(test) {
-        var result = new Buffer(options.incrementResult, 'hex');
+        var result = Buffer.from(options.incrementResult, 'hex');
 
         if (options.hasOwnProperty('nullish')) {
             var counter = new aes.Counter(options.nullish);
@@ -37,7 +37,7 @@ function makeTest (options) {
         }
 
         if (options.bytes) {
-            var bytes = new Buffer(options.bytes, 'hex');
+            var bytes = Buffer.from(options.bytes, 'hex');
 
             var counter = new aes.Counter(bytes);
             counter.increment();

test/test-errors.js

@@ -5,8 +5,7 @@ var nodeunit = require('nodeunit');
 var aes = require('../index');
 
 function newBuffer(length) {
-    var buffer = new Buffer(length);
-    buffer.fill(42);
+    var buffer = Buffer.alloc(length);
     return buffer;
 }