https://github.com/retirejs/js-dev-console-fu

https://github.com/retirejs/js-dev-console-fu

Last synced: 8 months ago
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• Host: GitHub
• URL: https://github.com/retirejs/js-dev-console-fu
• Owner: RetireJS
• Created: 2015-11-10T16:37:10.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-05-19T10:56:50.000Z (almost 10 years ago)
• Last Synced: 2025-03-04T09:43:46.922Z (about 1 year ago)
• Language: JavaScript
• Size: 6.84 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
### Base64

Browser:

    String.prototype.base64Decode = function() { return atob(this) }

    String.prototype.base64Encode = function() { return btoa(this) }

Node.js

    Array.prototype.base64Encode = function() { return new Buffer(this.slice()).toString('base64'); }

    String.prototype.base64Decode = function() { return Array.prototype.slice.apply(new Buffer(this.toString(), 'base64')); }

### Hex encoding 

    String.prototype.hexDecode = function() { return this.match(/../g).map(function(c) { return parseInt(c, 16) }) }

    String.prototype.hexEncode = function() { return this.toByteArray().hexEncode() }

    Number.prototype.toHex = function() { return ("0" + this.toString(16)).substr(-2) }

    Array.prototype.hexEncode = function() { return this.map(function(x) { return x.toHex() }).join("") }

### Ascii string vs byte array

    String.prototype.toByte = function() { return this.charCodeAt(0) }

    Number.prototype.toChar = function() { return String.fromCharCode(this) }

    String.prototype.toByteArray = function() { return this.split('').map(function(c){ return c.toByte() }) }

    Array.prototype.asString = function() { return String.fromCharCode.apply(null, this) }

### Xor and random bytes

    Array.prototype.xor = function(ar) { return this.map(function(e, i) { return e ^ ar[i % ar.length]; }) }

    Array.randomBytes = function(length) { return Array.prototype.slice.call(crypto.getRandomValues(new Uint8Array(length))) }

### Testing for insecure direct object references with jQuery

    var exists= []; for(var i = 0; i < 100 ; i++) (function(x) { $.getJSON("/?id=" + x).success(function() { e.push(x) }) })(i);

## Examples

XOR plain text with random key

    var key = Array.randomBytes(16);

    var cipher = "Hello world".toByteArray().xor(key).hexEncode();