buffer-equal-constant-time

Constant-time Buffer comparison for node.js. Should work with browserify too.

npm install buffer-equal-constant-time

var bufferEq = require('buffer-equal-constant-time');

var a = new Buffer('asdf');
var b = new Buffer('asdf');
if (bufferEq(a,b)) {
  // the same!
} else {
  // different in at least one byte!
}

If you'd like to install an .equal() method onto the node.js Buffer and SlowBuffer prototypes:

require('buffer-equal-constant-time').install();

var a = new Buffer('asdf');
var b = new Buffer('asdf');
if (a.equal(b)) {
  // the same!
} else {
  // different in at least one byte!
}

To get rid of the installed .equal() method, call .restore():

require('buffer-equal-constant-time').restore();

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Licensed under the BSD 3-clause license.