old-keypairs.js/lib/pem-packer.js

'use strict';

var PEM = module.exports;
var Enc = require('./encoding.js');

PEM.packBlock = function (opts) {
  // TODO allow for headers?
  var n = opts.lineLength || 64;
  var re = new RegExp('.{1,' + n + '}', 'g');
  return '-----BEGIN ' + opts.type + '-----\n'
    + Enc.bufToBase64(opts.bytes).match(re).join('\n') + '\n'
    + '-----END ' + opts.type + '-----'
  ;
};