flymis/WebRoot/dojojs/src/crypto/SHA1.js

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dojo.require("dojo.crypto");
dojo.provide("dojo.crypto.SHA1");
dojo.require("dojo.experimental");

/*
 *	A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
 *	in FIPS PUB 180-1
 *
 * 	Version 2.1a Copyright Paul Johnston 2000 - 2002.
 * 	Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * 	Distributed under the BSD License
 * 	See http://pajhome.org.uk/crypt/md5 for details.
 *
 *	Dojo port by Tom Trenka
 */
dojo.experimental("dojo.crypto.SHA1");

dojo.crypto.SHA1 = new function(){
	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("");
	}

	//	math
	function add(x,y){
		var l=(x&0xffff)+(y&0xffff);
		var m=(x>>16)+(y>>16)+(l>>16);
		return (m<<16)|(l&0xffff);
	}