2020-08-26 19:14:50 +05:30
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<style type="text/css">
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pre {
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font-family: monospace;
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display: block;
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white-space: pre;
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font-size: 2em;
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}
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</style>
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</head>
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<body>
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<script type="text/javascript">
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if (!Math.imul) Math.imul = function(a, b) {
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var aHi = (a >>> 16) & 0xffff;
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var aLo = a & 0xffff;
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var bHi = (b >>> 16) & 0xffff;
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var bLo = b & 0xffff;
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// the shift by 0 fixes the sign on the high part
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// the final |0 converts the unsigned value into a signed value
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return ((aLo * bLo) + (((aHi * bLo + aLo * bHi) << 16) >>> 0) | 0);
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};
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if (!Math.clz32) Math.clz32 = (function(log, LN2){
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return function(x) {
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// Let n be ToUint32(x).
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// Let p be the number of leading zero bits in
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// the 32-bit binary representation of n.
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// Return p.
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var asUint = x >>> 0;
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if (asUint === 0) {
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return 32;
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}
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return 31 - (log(asUint) / LN2 | 0) |0; // the "| 0" acts like math.floor
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};
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})(Math.log, Math.LN2);
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</script>
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<script src="https://cdn.jsdelivr.net/npm/promise-polyfill@8/dist/polyfill.min.js"></script>
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<script type="text/javascript" src="../lib/olm/olm_legacy.js"></script>
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<script type="text/javascript">
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2020-08-26 21:00:32 +05:30
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function doit(log) {
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var alice = new Olm.Account();
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2020-08-26 19:14:50 +05:30
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alice.create();
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2020-08-26 21:00:32 +05:30
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log("alice", alice.identity_keys());
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2020-08-26 19:14:50 +05:30
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2020-08-26 21:00:32 +05:30
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var bob = new Olm.Account();
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2020-08-26 19:14:50 +05:30
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bob.unpickle("secret", "EWfA87or4GgQ+wqVkyuFiW9gUk3FI6QSXgp8E2dS5RFLvXgy4oFvxwQ1gVnbMkdJz2Hy9ex9UmJ/ZyuRU0aRt0IwXpw/SUNq4IQeVJ7J/miXW7rV4Ep+4RSEf945KbDrokDCS2CoL5PIfv/NYyey32gA0hMi8wWIfIlOxFBV4SBJYSC+Qd54VjprwCg0Sn9vjQouKVrM/+5jzsv9+JK5OpWW0Vrb3qrXwyAOEAQ4WlOQcqZHAyPQIw");
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2020-08-26 21:00:32 +05:30
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log("bob", bob.identity_keys());
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2020-08-26 19:14:50 +05:30
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// generate OTK on receiver side
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bob.generate_one_time_keys(1);
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2020-08-26 21:00:32 +05:30
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var bobOneTimeKeys = JSON.parse(bob.one_time_keys());
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var otkName = Object.getOwnPropertyNames(bobOneTimeKeys.curve25519)[0];
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var bobOneTimeKey = bobOneTimeKeys.curve25519[otkName];
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2020-08-26 19:14:50 +05:30
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// encrypt
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2020-08-26 21:00:32 +05:30
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var aliceSession = new Olm.Session();
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2020-08-26 19:14:50 +05:30
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aliceSession.create_outbound(
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alice,
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JSON.parse(bob.identity_keys()).curve25519,
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bobOneTimeKey
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);
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2020-08-26 21:00:32 +05:30
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var message = aliceSession.encrypt("hello secret world");
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log("message", message);
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2020-08-26 19:14:50 +05:30
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// decrypt
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2020-08-26 21:00:32 +05:30
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var bobSession = new Olm.Session();
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2020-08-26 19:14:50 +05:30
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bobSession.create_inbound(bob, message.body);
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2020-08-26 21:00:32 +05:30
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var plaintext = bobSession.decrypt(message.type, message.body);
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log("plaintext", plaintext);
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2020-08-26 19:14:50 +05:30
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// remove Bob's OTK as it was used to start an olm session
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2020-08-26 21:00:32 +05:30
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log("bob OTK before removing", bob.one_time_keys());
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2020-08-26 19:14:50 +05:30
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bob.remove_one_time_keys(bobSession);
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2020-08-26 21:00:32 +05:30
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log("bob OTK after removing", bob.one_time_keys());
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}
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if (window.msCrypto && !window.crypto) {
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window.crypto = window.msCrypto;
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}
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function doRun(e) {
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e.target.setAttribute("disabled", "disabled");
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var logEl = document.getElementById("log");
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logEl.innerText = "";
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var startTime = performance.now();
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function log() {
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var timeDiff = Math.round(performance.now() - startTime).toString();
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while (timeDiff.length < 5) {
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timeDiff = "0" + timeDiff;
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}
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logEl.appendChild(document.createTextNode(timeDiff + " "));
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for (var i = 0; i < arguments.length; i += 1) {
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var value = arguments[i];
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if (typeof value !== "string") {
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value = JSON.stringify(value);
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}
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logEl.appendChild(document.createTextNode(value + " "));
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}
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logEl.appendChild(document.createTextNode("\n"));
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}
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doit(log);
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e.target.removeAttribute("disabled");
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}
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function main() {
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Olm.init( ).then(function() {
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var startButton = document.getElementById("start");
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startButton.innerText = "Start";
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startButton.addEventListener("click", doRun);
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2020-08-26 19:14:50 +05:30
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});
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}
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2020-08-26 21:00:32 +05:30
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document.addEventListener("DOMContentLoaded", main);
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2020-08-26 19:14:50 +05:30
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main();
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</script>
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2020-08-26 21:00:32 +05:30
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<pre id="log"></pre>
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<button id="start">Loading...</button>
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2020-08-26 19:14:50 +05:30
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</body>
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</html>
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