add html and js to interact with the wasm lib, add server serving wasm lib mime type, wasm wrapper print shares result into document

5 years ago · 9d84e20a5f
7 changed files with 79 additions and 6 deletions
--- a/wasm/.gitignore
+++ b/wasm/.gitignore
@ -0,0 +1,2 @@
 node_modules
 package-lock.json
--- a/wasm/index.html
+++ b/wasm/index.html
@ -0,0 +1,23 @@
 <html>
 <head>
 	<meta charset="utf-8">
 	<title>shamirsecretsharing wasm</title>
 </head>
 <body>
 	<script src="wasm_exec.js"></script>
 	<script>
 		const go = new Go();
 		WebAssembly.instantiateStreaming(fetch('shamirsecretsharing.wasm'), go.importObject).then(function(dat) {
 		    go.run(dat.instance);
 		});
 	</script>
 	<input id="secret" value="123456789" />
 	<input id="nShares" value="5"/>
 	<input id="nNeededShares" value="3"/>
 	<input id="p" value="7"/>
 	<button onClick="callCreateShares();">Create Shares</button>
 	<textarea id="sharesResult" rows="10" style="width: 80%;">
 	</textarea>
 	<script src="index.js"></script>
 </body>
 </html>
--- a/wasm/index.js
+++ b/wasm/index.js
@ -0,0 +1,8 @@
 function callCreateShares() {
 	let secret = Number(document.getElementById("secret").value);
 	let nShares = Number(document.getElementById("nShares").value);
 	let nNeededShares = Number(document.getElementById("nNeededShares").value);
 	let p = Number(document.getElementById("p").value);
 	
 	createShares(nNeededShares, nShares, p, secret);
 }
--- a/wasm/package.json
+++ b/wasm/package.json
@ -0,0 +1,15 @@
 {
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "server.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node server.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.16.4"
  }
 }
--- a/wasm/server.js
+++ b/wasm/server.js
@ -0,0 +1,7 @@
 var express = require('express');
 var app = express();
 express.static.mime.types['wasm'] = 'application/wasm';
 app.use(express.static(__dirname + '/'));
 port=8080
 app.listen(8080);
 console.log("server running at :8080")
--- a/wasm/shamirsecretsharing-wasm-wrapper.go
+++ b/wasm/shamirsecretsharing-wasm-wrapper.go
@ -1,6 +1,7 @@
 package main

 import (
 	"crypto/rand"
 	"math/big"
 	"syscall/js"

@ -17,11 +18,11 @@ func main() {
 }

 func registerCallbacks() {
 	js.Global().Set("createShares", js.ValueOf(createShares))
 	js.Global().Set("lagrangeInterpolation", js.ValueOf(lagrangeInterpolation))
 	js.Global().Set("createShares", js.FuncOf(createShares))
 	js.Global().Set("lagrangeInterpolation", js.FuncOf(lagrangeInterpolation))
 }

 func createShares(i []js.Value) {
 func createShares(this js.Value, i []js.Value) interface{} {
 	nNeededShares, ok := new(big.Int).SetString(i[0].String(), 10)
 	if !ok {
 		println("error parsing parameter in position 0")
@ -34,29 +35,45 @@ func createShares(i []js.Value) {
 	if !ok {
 		println("error parsing parameter in position 2")
 	}
 	bits := 2048
 	p, err := rand.Prime(rand.Reader, bits/2) // move this out from wasm, it tooks too much time
 	if err != nil {
 		println(err.Error())
 	}
 	k, ok := new(big.Int).SetString(i[3].String(), 10)
 	if !ok {
 		println("error parsing parameter in position 3")
 	}
 	println("nNeededShares", nNeededShares.String())
 	println("nShares", nShares.String())
 	println("p", p.String())
 	println("k (secret)", k.String())
 	shares, err := shamirsecretsharing.Create(nNeededShares, nShares, p, k)
 	if err != nil {
 		println("error generating the shares")
 		println(err.Error())
 	}
 	println(shares)
 	println("shares", shares)
 	sharesStr := sharesToString(shares)
 	println(sharesStr)
 	println("sharesStr", sharesStr)
 	return nil
 }

 func sharesToString(shares [][]*big.Int) []string {
 	var printString string
 	var s []string
 	for i := 0; i < len(shares); i++ {
 		s = append(s, shares[i][0].String())
 		s = append(s, shares[i][1].String())
 		printString = printString + "[" + shares[i][0].String() + ", " + shares[i][1].String() + "]\n"
 		println(shares[i][0].String())
 		println(shares[i][1].String())
 	}
 	js.Global().Get("document").Call("getElementById", "sharesResult").Set("innerHTML", printString)
 	return s
 }

 func lagrangeInterpolation(i []js.Value) {
 func lagrangeInterpolation(this js.Value, i []js.Value) interface{} {
 	p, ok := new(big.Int).SetString(i[0].String(), 10)
 	if !ok {
 		println("error parsing parameter in position 0 (p)")
@ -81,4 +98,5 @@ func lagrangeInterpolation(i []js.Value) {

 	secr := shamirsecretsharing.LagrangeInterpolation(p, shares)
 	println(secr.String())
 	return nil
 }
--- a/wasm/shamirsecretsharing.wasm
+++ b/wasm/shamirsecretsharing.wasm