[js] add getXXXFromHexStr

docs/demo/she-demo2.js

@@ -88,22 +88,22 @@ function send() {
 	$('.encG2y').each(function() {
 		ct2.push($(this).text())
 	})
-	var obj = $('#server_table')
+	let obj = $('#server_table')
 	obj.html('')
 	{
-		var header = [
+		let header = [
 			'EncG1(x)', 'EncG2(y)', 'EncGT(x * y)'
 		]
-		var t = $('<tr>').attr('id', 'header')
+		let t = $('<tr>').attr('id', 'header')
-		for (var i = 0; i < header.length; i++) {
+		for (let i = 0; i < header.length; i++) {
 			t.append(
 				$('<th>').append(header[i])
 			)
 		}
 		obj.append(t)
 	}
-	for (var i = 0; i < ct1.length; i++) {
+	for (let i = 0; i < ct1.length; i++) {
-		var t = $('<tr>')
+		let t = $('<tr>')
 		t.append(
 			$('<td class="encG1xS">').append(ct1[i])
 		).append(
@@ -116,22 +116,20 @@ function send() {
 }
 
 function mul() {
-	let c1 = new she.CipherTextG1()
-	let c2 = new she.CipherTextG2()
 	$('.encG1xS').each(function() {
 		let o = $(this)
-		c1.fromHexStr(o.text())
+		let c1 = she.getCipherTextG1FromHexStr(o.text())
-		c2.fromHexStr(o.next().text())
+		let c2 = she.getCipherTextG2FromHexStr(o.next().text())
 		let ct = she.mul(c1, c2)
 		o.next().next().text(ct.toHexStr())
 	})
 }
 
 function sum() {
-	let ct = new she.CipherTextGT()
 	let csum = pub.encGT(0)
 	$('.encGTxyS').each(function() {
-		ct.fromHexStr($(this).text())
+		let s = $(this).text()
+		let ct = she.getCipherTextGTFromHexStr(s)
 		csum = she.add(csum, ct)
 	})
 	setText('encSumS', csum.toHexStr())
@@ -143,8 +141,7 @@ function recv() {
 
 function dec() {
 	let s = getText('encSumC')
-	let ct = new she.CipherTextGT()
+	let ct = she.getCipherTextGTFromHexStr(s)
-	ct.fromHexStr(s)
 	let v = sec.dec(ct)
 	setText('ret', v)
 }

docs/demo/she.js

@@ -308,6 +308,11 @@
 		she.SecretKey.prototype.dump = function(msg = 'sec ') {
 			console.log(msg + this.toHexStr())
 		}
+		she.getSecretKeyFromHexStr = function(s) {
+			r = new she.SecretKey()
+			r.fromHexStr(s)
+			return r
+		}
 		she.PublicKey = function() {
 			this.a_ = new Uint32Array(SHE_PUBLICKEY_SIZE / 4)
 		}
@@ -326,6 +331,11 @@
 		she.PublicKey.prototype.dump = function(msg = 'pub ') {
 			console.log(msg + this.toHexStr())
 		}
+		she.getPublicKeyFromHexStr = function(s) {
+			r = new she.PublicKey()
+			r.fromHexStr(s)
+			return r
+		}
 		she.CipherTextG1 = function() {
 			this.a_ = new Uint32Array(SHE_CIPHERTEXT_G1_SIZE / 4)
 		}
@@ -344,6 +354,11 @@
 		she.CipherTextG1.prototype.dump = function(msg = 'ct1 ') {
 			console.log(msg + this.toHexStr())
 		}
+		she.getCipherTextG1FromHexStr = function(s) {
+			r = new she.CipherTextG1()
+			r.fromHexStr(s)
+			return r
+		}
 		she.CipherTextG2 = function() {
 			this.a_ = new Uint32Array(SHE_CIPHERTEXT_G2_SIZE / 4)
 		}
@@ -362,6 +377,11 @@
 		she.CipherTextG2.prototype.dump = function(msg = 'ct2 ') {
 			console.log(msg + this.toHexStr())
 		}
+		she.getCipherTextG2FromHexStr = function(s) {
+			r = new she.CipherTextG2()
+			r.fromHexStr(s)
+			return r
+		}
 		she.CipherTextGT = function() {
 			this.a_ = new Uint32Array(SHE_CIPHERTEXT_GT_SIZE / 4)
 		}
@@ -380,6 +400,11 @@
 		she.CipherTextGT.prototype.dump = function(msg = 'ctt ') {
 			console.log(msg + this.toHexStr())
 		}
+		she.getCipherTextGTFromHexStr = function(s) {
+			r = new she.CipherTextGT()
+			r.fromHexStr(s)
+			return r
+		}
 		she.SecretKey.prototype.setByCSPRNG = function() {
 			let stack = mod.Runtime.stackSave()
 			let secPos = mod.Runtime.stackAlloc(this.a_.length * 4)