root / trunk / web / dojo / dojox / encoding / crypto / RSAKey-ext.js @ 13
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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.encoding.crypto.RSAKey-ext"]){ |
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| 9 | dojo._hasResource["dojox.encoding.crypto.RSAKey-ext"]=true; |
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| 10 | dojo.provide("dojox.encoding.crypto.RSAKey-ext");
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| 11 | dojo.experimental("dojox.encoding.crypto.RSAKey-ext");
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| 12 | dojo.require("dojox.encoding.crypto.RSAKey");
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| 13 | dojo.require("dojox.math.BigInteger-ext");
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| 14 | (function(){
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| 15 | var _1=dojox.math.BigInteger;
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| 16 | function _2(d,n){ |
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| 17 | var b=d.toByteArray();
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| 18 | for(var i=0,_3=b.length;i<_3&&!b[i];++i){ |
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| 19 | } |
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| 20 | if(b.length-i!==n-1||b[i]!==2){ |
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| 21 | return null; |
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| 22 | } |
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| 23 | for(++i;b[i];){
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| 24 | if(++i>=_3){
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| 25 | return null; |
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| 26 | } |
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| 27 | } |
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| 28 | var _4=""; |
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| 29 | while(++i<_3){
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| 30 | _4+=String.fromCharCode(b[i]); |
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| 31 | } |
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| 32 | return _4;
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| 33 | }; |
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| 34 | dojo.extend(dojox.encoding.crypto.RSAKey,{setPrivate:function(N,E,D){
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| 35 | if(N&&E&&N.length&&E.length){
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| 36 | this.n=new _1(N,16); |
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| 37 | this.e=parseInt(E,16); |
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| 38 | this.d=new _1(D,16); |
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| 39 | }else{
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| 40 | throw new Error("Invalid RSA private key"); |
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| 41 | } |
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| 42 | },setPrivateEx:function(N,E,D,P,Q,DP,DQ,C){ |
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| 43 | if(N&&E&&N.length&&E.length){
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| 44 | this.n=new _1(N,16); |
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| 45 | this.e=parseInt(E,16); |
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| 46 | this.d=new _1(D,16); |
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| 47 | this.p=new _1(P,16); |
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| 48 | this.q=new _1(Q,16); |
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| 49 | this.dmp1=new _1(DP,16); |
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| 50 | this.dmq1=new _1(DQ,16); |
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| 51 | this.coeff=new _1(C,16); |
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| 52 | }else{
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| 53 | throw new Error("Invalid RSA private key"); |
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| 54 | } |
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| 55 | },generate:function(B,E){ |
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| 56 | var _5=this.rngf(),qs=B>>1; |
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| 57 | this.e=parseInt(E,16); |
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| 58 | var ee=new _1(E,16); |
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| 59 | for(;;){
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| 60 | for(;;){
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| 61 | this.p=new _1(B-qs,1,_5); |
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| 62 | if(!this.p.subtract(_1.ONE).gcd(ee).compareTo(_1.ONE)&&this.p.isProbablePrime(10)){ |
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| 63 | break;
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| 64 | } |
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| 65 | } |
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| 66 | for(;;){
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| 67 | this.q=new _1(qs,1,_5); |
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| 68 | if(!this.q.subtract(_1.ONE).gcd(ee).compareTo(_1.ONE)&&this.q.isProbablePrime(10)){ |
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| 69 | break;
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| 70 | } |
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| 71 | } |
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| 72 | if(this.p.compareTo(this.q)<=0){ |
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| 73 | var t=this.p; |
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| 74 | this.p=this.q; |
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| 75 | this.q=t;
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| 76 | } |
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| 77 | var p1=this.p.subtract(_1.ONE); |
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| 78 | var q1=this.q.subtract(_1.ONE); |
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| 79 | var _6=p1.multiply(q1);
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| 80 | if(!_6.gcd(ee).compareTo(_1.ONE)){
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| 81 | this.n=this.p.multiply(this.q); |
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| 82 | this.d=ee.modInverse(_6);
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| 83 | this.dmp1=this.d.mod(p1); |
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| 84 | this.dmq1=this.d.mod(q1); |
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| 85 | this.coeff=this.q.modInverse(this.p); |
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| 86 | break;
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| 87 | } |
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| 88 | } |
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| 89 | _5.destroy(); |
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| 90 | },decrypt:function(_7){ |
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| 91 | var c=new _1(_7,16),m; |
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| 92 | if(!this.p||!this.q){ |
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| 93 | m=c.modPow(this.d,this.n); |
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| 94 | }else{
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| 95 | var cp=c.mod(this.p).modPow(this.dmp1,this.p),cq=c.mod(this.q).modPow(this.dmq1,this.q); |
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| 96 | while(cp.compareTo(cq)<0){ |
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| 97 | cp=cp.add(this.p);
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| 98 | } |
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| 99 | m=cp.subtract(cq).multiply(this.coeff).mod(this.p).multiply(this.q).add(cq); |
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| 100 | } |
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| 101 | if(!m){
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| 102 | return null; |
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| 103 | } |
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| 104 | return _2(m,(this.n.bitLength()+7)>>3); |
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| 105 | }}); |
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| 106 | })(); |
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| 107 | } |