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