Project

General

Profile

Statistics
| Revision:

root / trunk / web / dojo / dojox / math / random / Secure.js @ 10

History | View | Annotate | Download (1.27 KB)

1 9 andrej.cim
/*
2
        Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
3
        Available via Academic Free License >= 2.1 OR the modified BSD license.
4
        see: http://dojotoolkit.org/license for details
5
*/
6
7
8
if(!dojo._hasResource["dojox.math.random.Secure"]){
9
dojo._hasResource["dojox.math.random.Secure"]=true;
10
dojo.provide("dojox.math.random.Secure");
11
dojo.declare("dojox.math.random.Secure",null,{constructor:function(_1,_2){
12
this.prng=_1;
13
var p=this.pool=new Array(_1.size);
14
this.pptr=0;
15
for(var i=0,_3=_1.size;i<_3;){
16
var t=Math.floor(65536*Math.random());
17
p[i++]=t>>>8;
18
p[i++]=t&255;
19
}
20
this.seedTime();
21
if(!_2){
22
this.h=[dojo.connect(dojo.body(),"onclick",this,"seedTime"),dojo.connect(dojo.body(),"onkeypress",this,"seedTime")];
23
}
24
},destroy:function(){
25
if(this.h){
26
dojo.forEach(this.h,dojo.disconnect);
27
}
28
},nextBytes:function(_4){
29
var _5=this.state;
30
if(!_5){
31
this.seedTime();
32
_5=this.state=this.prng();
33
_5.init(this.pool);
34
for(var p=this.pool,i=0,_6=p.length;i<_6;p[i++]=0){
35
}
36
this.pptr=0;
37
}
38
for(var i=0,_6=_4.length;i<_6;++i){
39
_4[i]=_5.next();
40
}
41
},seedTime:function(){
42
this._seed_int(new Date().getTime());
43
},_seed_int:function(x){
44
var p=this.pool,i=this.pptr;
45
p[i++]^=x&255;
46
p[i++]^=(x>>8)&255;
47
p[i++]^=(x>>16)&255;
48
p[i++]^=(x>>24)&255;
49
if(i>=this.prng.size){
50
i-=this.prng.size;
51
}
52
this.pptr=i;
53
}});
54
}