CryptoJS Changeset - d27d9e2dd943

Changeset - d27d9e2dd943

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Laman - 6 years ago 2018-07-07 13:16:57

chacha finished, tests refactored into functions

3 files changed with 76 insertions and 32 deletions:

blake.js

chacha.js

util.js

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blake.js

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 // https://tools.ietf.org/html/rfc7693
 const MASK=0xffffffff;
 const BLOCK_LEN=64;
 const IV=[0x6A09E667,0xBB67AE85,0x3C6EF372,0xA54FF53A,0x510E527F,0x9B05688C,0x1F83D9AB,0x5BE0CD19];
@@ @@ -92,6 +91,7 @@ function blake2s(data,outputLen=32,key=[ @@
 	return h.digest();
+}
 function testBlake(){
 let msg=str2utf8("abc");
 let longMsg=str2utf8("0123456789.10.456789.20.456789.30.456789.40.456789.50.456789.60.456789.70.456789.80.456789.90.456789");
 let key=str2utf8("zoqpiz");
@@ @@ -106,3 +106,4 @@ console.log(bytes2hex(blake2s(msg,32,lon @@
 console.log(bytes2hex(blake2s([]))=="69217a3079908094e11121d042354a7c1f55b6482ca1a51e1b250dfd1ed0eef9");
 console.log(bytes2hex(blake2s(longMsg.slice(0,64)))=="70484f89974551454d596350dda8af2aa6f0811b527549b9ecfe7adede063753");
 console.log(bytes2hex(blake2s(longMsg.slice(0,65)))=="af14d4f74947bbde734d0e3015c667cc80676efe4349be235be8046e9e45e0ae");
+}

chacha.js

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 MASK=0xffffffff;
 function int2bytes(x){
 	var res=new Array(4);
 	for(var i=0;i<4;i++){
 		res[i]=x&0xff;
 		x>>>=8;
+	}
 	return res;
+}
 // https://tools.ietf.org/html/rfc7539
 function lrot(x,shift){
 	return (x<<shift|x>>>(32-shift))&MASK;
+}
 function quarterRound(arr,ia,ib,ic,id){
 	var a=arr[ia], b=arr[ib], c=arr[ic], d=arr[id];
 function createNonce(){
 	let nonce=new Uint8Array(12);
 	window.crypto.getRandomValues(nonce);
 	return nonce;
+}
 function Chacha20(key,nonce){
 	if(nonce===undefined){
 		let nonce=createNonce();
+	}
 	nonce=bytes2int32s(nonce);
 	key=bytes2int32s(key);
 	this._state=[
 x61707865,0x3320646e,0x79622d32,0x6b206574,
 		key[0],key[1],key[2],key[3],
 		key[4],key[5],key[6],key[7],
 ,nonce[0],nonce[1],nonce[2]
 	];
 	this._buffer=[];
+}
 Chacha20.prototype.setPos=function(pos){
 	this._state[12]=pos;
 	this._buffer=[];
+}
 Chacha20.prototype.getByte=function(){
 	if(this._buffer.length==0){
 		this._buffer=int32s2bytes(this._computeBlock());
+	}
 	return this._buffer.shift();
 };
 Chacha20.prototype._quarterRound=function(arr,ia,ib,ic,id){
 	let a=arr[ia], b=arr[ib], c=arr[ic], d=arr[id];
 	a=(a+b)&MASK; d=lrot(d^a,16);
 	c=(c+d)&MASK; b=lrot(b^c,12);
 	a=(a+b)&MASK; d=lrot(d^a,8);
 	c=(c+d)&MASK; b=lrot(b^c,7);
 	arr[ia]=a; arr[ib]=b; arr[ic]=c; arr[id]=d;
 };
 Chacha20.prototype._computeBlock=function(){
 	let state=this._state.slice();
 	for(let i=0;i<10;i++){ // 10 double rounds
 		// column round
 		this._quarterRound(state,0,4,8,12);
 		this._quarterRound(state,1,5,9,13);
 		this._quarterRound(state,2,6,10,14);
 		this._quarterRound(state,3,7,11,15);
 		// diagonal round
 		this._quarterRound(state,0,5,10,15);
 		this._quarterRound(state,1,6,11,12);
 		this._quarterRound(state,2,7,8,13);
 		this._quarterRound(state,3,4,9,14);
+}
 function chacha(key,nonce,position){
 	var x=input.slice();
 	return state.map((xi,i)=>(xi+this._state[i])&MASK);
 };
 	for(var i=0;i<10;i++){
 		// column round
 		quarterRound(x,0,4,8,12);
 		quarterRound(x,1,5,9,13);
 		quarterRound(x,2,6,10,14);
 		quarterRound(x,3,7,11,15);
 		// diagonal round
 		quarterRound(x,0,5,10,15);
 		quarterRound(x,1,6,11,12);
 		quarterRound(x,2,7,8,13);
 		quarterRound(x,3,4,9,14);
 Chacha20.prototype._incrementPos=function(){
 	this._state[12]=(this._state[12]+1)&MASK;
 };
 function encrypt(message,key){
 	let nonce=Date.now();
 	let nonce0=nonce;
 	let hashedKey=blake2s(str2bytes(key));
 	message=str2bytes(message);
+	}
 	return x.map((xi,i)=>(xi+input[i])&MASK);
 function testChacha(){
 	let key=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31];
 	let nonce=[0,0,0,9,0,0,0,74,0,0,0,0];
 	let cipher=new Chacha20(key,nonce);
 	cipher.setPos(1);
 	let output=cipher._computeBlock().map(x=>(x>>>0).toString(16).padStart(8,"0"));
 	let example=["e4e7f110","15593bd1","1fdd0f50","c47120a3","c7f4d1c7","0368c033","9aaa2204","4e6cd4c3","466482d2","09aa9f07","05d7c214","a2028bd9","d19c12b5","b94e16de","e883d0cb","4e3c50a2"];
 	console.log(output.every((x,i)=>x==example[i]));
+}
 function encrypt(message,key){
 	var nonce=Date.now();
 	var nonce0=nonce;
+}

util.js

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 const MASK=0xffffffff;
 function bytes2int32(arr){
 	return arr.reduce((acc,b,i)=>acc|b<<(i*8));
+}

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