key-forge/lib/index.js

A simple random key generator for use with Node.

// Generated by CoffeeScript 1.8.0
(function() {
  var Buffer, Crypto, Keys,
    __slice = [].slice;

  Crypto = require("crypto");

  Buffer = (require("buffer")).Buffer;

  Keys = {
    randomKey: function(size, format) {
      if (format == null) {
        format = "hex";
      }
      return Keys.bufferToKey(Keys.randomBytes(size), format);
    },
    randomBytes: function(size) {
      return Crypto.randomBytes(size);
    },
    numberToKey: function(number) {
      return Keys.bufferToKey(Keys.numberToBytes(number));
    },
    numberToBytes: function(number, size) {
      var bytes, x;
      if (size == null) {
        size = 8;
      }
      bytes = [];
      x = number;
      while (x >= 256) {
        bytes.push(x % 256);
        x = Math.floor(x / 256);
      }
      bytes.push(x);
      while (bytes.length < size) {
        bytes.push(0);
      }
      return new Buffer(bytes.reverse());
    },
    bytesToNumber: function(bytes) {
      var byte, x, _i, _len;
      x = 0;
      for (_i = 0, _len = bytes.length; _i < _len; _i++) {
        byte = bytes[_i];
        x *= 256;
        x += byte;
      }
      return x;
    },
    bufferToKey: function(buffer, format) {
      if (format == null) {
        format = "hex";
      }
      switch (format) {
        case "hex":
          return buffer.toString("hex");
        case "base64":
          return buffer.toString("base64").replace(/\=+$/, '');
        case "base64url":
          return Keys.sanitize(buffer.toString("base64"));
        default:
          throw new Error("Unknown format: '" + format + "'");
      }
    },
    sanitize: function(string) {
      return string.replace(/\+/g, '-').replace(/\//g, '_').replace(/\=+$/, '');
    },
    buffersToKey: function() {
      var buffers;
      buffers = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
      return Keys.bufferToKey(Buffer.concat(buffers));
    }
  };

  module.exports = Keys;

}).call(this);