buffer-equal-constant-time

Constant-time comparison of Buffers

buffer-equal-constant-time

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

  npm install buffer-equal-constant-time

Usage

  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.