buffer-equal-constant-time

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

1  npm install buffer-equal-constant-time

Usage

1  var bufferEq = require('buffer-equal-constant-time');
2
3  var a = new Buffer('asdf');
4  var b = new Buffer('asdf');
5  if (bufferEq(a,b)) {
6    // the same!
7  } else {
8    // different in at least one byte!
9  }

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

1  require('buffer-equal-constant-time').install();
2
3  var a = new Buffer('asdf');
4  var b = new Buffer('asdf');
5  if (a.equal(b)) {
6    // the same!
7  } else {
8    // different in at least one byte!
9  }

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

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

Legal

© 2013 GoInstant Inc., a salesforce.com company

Licensed under the BSD 3-clause license.