bufferequals polyfill

Author: monken

conditions.js

@@ -1,5 +1,6 @@
 var _ = require('lodash'),
-  ipcheck = require('ipcheck');
+  ipcheck = require('ipcheck'),
+  bufferEquals = require('./lib/bufferequals');
 
 var conditions = {
   NumericEquals: function NumericEquals(a, b) {
@@ -58,11 +59,11 @@ var conditions = {
   },
   BinaryEquals: function BinaryEquals(a, b) {
     if(!_.isString(b) || !(a instanceof Buffer)) return false;
-    return a.equals(new Buffer(b, 'base64'));
+    return bufferEquals(a, new Buffer(b, 'base64'));
   },
   BinaryNotEquals: function BinaryEquals(a, b) {
     if(!_.isString(b) || !(a instanceof Buffer)) return false;
-    return !a.equals(new Buffer(b, 'base64'));
+    return !bufferEquals(a, new Buffer(b, 'base64'));
   },
   /*
   ArnEquals

lib/bufferequals.js

@@ -0,0 +1,10 @@
+module.exports = function(a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) return false;
+  if (typeof a.equals === 'function') return a.equals(b);
+  if (a === b) return true;
+  if (a.length !== b.length) return false;
+  for (var i = 0; i < a.length; i++) {
+    if (a[i] !== b[i]) return false;
+  }
+  return true;
+};