Base64 Encryption

[Eric]

function d2b(num,len)
{
   if(!num.toString().match(/^\d+$/))
   {
      alert("You either did not put in anything, or you put in a character other than numbers");
      return 'Invalid';
   }
   
   var binary = '';
   var toAdd = 0;
   for(var i = 0; i < len; i++){
      toAdd = num % 2;
      num = (num - toAdd) / 2;
      binary = toAdd + '' + binary;
   }
   return binary;
}

function b2d(num)
{
   if(!num.toString().match(/^[0-1]+$/))
   {
      alert("You either did not put in anything, or you put in a character besides a 1 or a 0.");
      return 'Invalid';
   }
   return parseInt(num,2);
}

String.prototype.base64Enc = function()
{
   
   var letNums = new Array();
   var based = new Array();
   var binStr = '';
   var enc = '';
   for(var i=0;i<this.length;i++)
   {
      letNums = d2b(this.charCodeAt(i),8);
      binStr += letNums;
   }
   var b = 0;
   var e = 6;
   while(e < binStr.length)
   {
      based[based.length] = binStr.substring(b,e);
      e += 6;
      b += 6;
   }
   based[based.length] = binStr.substring(b,binStr.length);
   for(b=0;b<based.length;b++)
   {
      enc += String.fromCharCode(b2d(based)+65);
   }
   return enc;
}

String.prototype.base64Dec = function()
{
   
   var binStr = '';
   var origStr = '';
   for(var i=0;i<this.length-1;i++)
   {
      binStr += d2b(this.charCodeAt(i)-65,6);
   }
   var x = 8 - (binStr.length % 8);
   binStr += d2b(this.charCodeAt(i)-65,x);
   var b = 0;
   var e = 8;
   while(e <= binStr.length)
   {
      origStr += String.fromCharCode(b2d(binStr.substring(b,e)));
      e += 8;
      b += 8;
   }
   return origStr;
}

Well, there it is. Also, there is a number to binary and binary to number encryption.

[Peter]

Good effort Eric, but is it true base 64 encoding?

[Eric]

peter said:

Good effort Eric, but is it true base 64 encoding?

Yes

[Peter]

So if I was to encrypt something in it, I should be able to decrypt it using my base64 decryption function?

Because I have a base64 encryption/decryption generator, and it differs from yours. If I encode something with yours and then pass it to my generator, it won't decode it back to the original string.

[Eric]

peter said:

So if I was to encrypt something in it, I should be able to decrypt it using my base64 decryption function?

Because I have a base64 encryption/decryption generator, and it differs from yours. If I encode something with yours and then pass it to my generator, it won't decode it back to the original string.

Perhaps I am mistaken, I will show you what I read:

www.cpp-home.com/tutorial.php?102_1

That's what I read, and that's what my code follows. Not to mention that I first convert my letters to ASCII numbers, which may not happen in that generator. I also added 60 to the return of the ASCII number, so that it would only show good characters.

[Peter]

Yeah, have read that before.

Have a look at this, then try it in yours...

[CLICK]

That is using PHP base64 function, so that should be correct

[Eric]

Read my edits, I just realized I did a few things to fix it up