flymis/WebRoot/dojojs/src/crypto/MD5.js

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dojo.require("dojo.crypto");
dojo.provide("dojo.crypto.MD5");

/*	Return to a port of Paul Johnstone's MD5 implementation
 *	http://pajhome.org.uk/crypt/md5/index.html
 *
 *	Copyright (C) Paul Johnston 1999 - 2002.
 *	Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * 	Distributed under the BSD License
 *
 *	Dojo port by Tom Trenka
 *
 *	2005-12-7
 *	All conversions are internalized (no dependencies)
 *	implemented getHMAC for message digest auth.
 */
dojo.crypto.MD5 = new function(){
	//	summary
	//	object for creating digests using the MD5 algorithm
	var chrsz=8;
	var mask=(1<<chrsz)-1;
	function toWord(s) {
	  var wa=[];
	  for(var i=0; i<s.length*chrsz; i+=chrsz)
		wa[i>>5]|=(s.charCodeAt(i/chrsz)&mask)<<(i%32);
	  return wa;
	}
	function toString(wa){
		var s=[];
		for(var i=0; i<wa.length*32; i+=chrsz)
			s.push(String.fromCharCode((wa[i>>5]>>>(i%32))&mask));
		return s.join("");
	}
	function toHex(wa) {
		var h="0123456789abcdef";
		var s=[];
		for(var i=0; i<wa.length*4; i++){
			s.push(h.charAt((wa[i>>2]>>((i%4)*8+4))&0xF)+h.charAt((wa[i>>2]>>((i%4)*8))&0xF));
		}
		return s.join("");
	}
	function toBase64(wa){
		var p="=";
		var tab="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
		var s=[];
		for(var i=0; i<wa.length*4; i+=3){
			var t=(((wa[i>>2]>>8*(i%4))&0xFF)<<16)|(((wa[i+1>>2]>>8*((i+1)%4))&0xFF)<<8)|((wa[i+2>>2]>>8*((i+2)%4))&0xFF);
			for(var j=0; j<4; j++){
				if(i*8+j*6>wa.length*32) s.push(p);
				else s.push(tab.charAt((t>>6*(3-j))&0x3F));
			}
		}
		return s.join("");
	}
	function add(x,y) {
		var l=(x&0xFFFF)+(y&0xFFFF);
		var m=(x>>16)+(y>>16)+(l>>16);
		return (m<<16)|(l&0xFFFF);
	}
	function R(n,c){ return (n<<c)|(n>>>(32-c)); }