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GNU GENERAL PUBLIC LICENSE
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into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

14
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# PWA Spectre
## Building
`PWA_SPECTRE_SCOPER` can be used to configure the scoper used. Defaults to `com.lyndir.masterpassword`.
```shell
GOOS=js GOARCH=wasm PWA_SPECTRE_SCOPER="com.lyndir.masterpassword" go generate ./...
go build ./cmd/pwa-spectre
```
## License
[GPLv3](LICENSE) - Same as original algorithm

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assets/assets.go 100644
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package assets
import "embed"
//go:embed index.html sakura.css spectre.wasm wasm.js
var Assets embed.FS

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Spectre</title>
<link rel="stylesheet" href="sakura.css"/>
<script src="wasm.js"></script>
<script defer>
const go = new Go();
WebAssembly.instantiateStreaming(fetch("spectre.wasm"), go.importObject).then((result) => {
go.run(result.instance);
const $title = document.getElementById("title");
const $subtitle = document.getElementById("subtitle");
const $username = document.getElementById("username");
const $secret = document.getElementById("secret");
const $counter = document.getElementById("counter");
const $scope = document.getElementById("scope");
const $template = document.getElementById("template");
const $site = document.getElementById("site");
const $password = document.getElementById("password");
// Warning for non-default scoper
if (!defaultScoper) {
$title.innerText = `${$title.innerText}⚠`;
$subtitle.innerText = "This instance is not using the default scoper"
}
// Default scope template
$scope.addEventListener("change", () => {
let tmpl;
switch ($scope.value) {
case "a":
tmpl = "long";
break;
case "i":
tmpl = "name";
break;
case "r":
tmpl = "phrase";
break;
}
$template.value = tmpl;
});
// Generate spectre
let s;
async function checkSpectre() {
if ($username.value === "" || $secret.value === "") return;
s = spectre($username.value, $secret.value);
}
$username.addEventListener("change", () => checkSpectre(), false);
$secret.addEventListener("change", () => checkSpectre(), false);
// Generate password
function checkPassword() {
if ($username.value === "" || $secret.value === "" || $site.value === "") return;
// Site(site, counter, scope, template)
$password.innerText = s.Site($site.value, parseInt($counter.value), $scope.value, $template.value);
}
$counter.addEventListener("change", checkPassword, false);
$scope.addEventListener("change", checkPassword, false);
$template.addEventListener("change", checkPassword, false);
$site.addEventListener("change", checkPassword, false);
});
</script>
</head>
<body>
<h1 id="title">Spectre</h1>
<small id="subtitle"></small>
<hr/>
<label for="username">Username</label>
<input id="username" type="text" placeholder="Robert Lee Mitchell"/>
<label for="secret">Secret</label>
<input id="secret" type="password" placeholder="banana colored duckling"/>
<label for="counter">Counter</label>
<input id="counter" type="number" value="1" min="1"/>
<label for="scope">Scope</label>
<select id="scope">
<option value="a">Authentication</option>
<option value="i">Identification</option>
<option value="r">Recovery</option>
</select>
<label for="template">Template</label>
<select id="template">
<option value="max">Maximum</option>
<option value="long" selected>Long</option>
<option value="med">Medium</option>
<option value="short">Short</option>
<option value="pin">Pin</option>
<option value="name">Name</option>
<option value="phrase">Phrase</option>
<option value="basic">Basic</option>
</select>
<label for="site">Site</label>
<input id="site" type="text" placeholder="twitter.com"/>
<hr/>
<label for="password">Password</label>
<pre id="password"></pre>
</body>
</html>

249
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/* Sakura.css v1.3.1
* ================
* Minimal css theme.
* Project: https://github.com/oxalorg/sakura/
*/
/* Default Sakura Theme */
:root {
--color-blossom: #1d7484;
--color-fade: #982c61;
--color-bg: #f9f9f9;
--color-bg-alt: #f1f1f1;
--color-text: #4a4a4a;
}
/* Sakura Dark Theme */
@media (prefers-color-scheme: dark) {
:root {
--color-blossom: #ffffff;
--color-fade: #c9c9c9;
--color-bg: #222222;
--color-bg-alt: #4a4a4a;
--color-text: #c9c9c9;
}
}
html {
font-size: 62.5%;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}
body {
font-size: 1.8rem;
line-height: 1.618;
max-width: 38em;
margin: auto;
color: var(--color-text);
background-color: var(--color-bg);
padding: 13px;
}
@media (max-width: 684px) {
body {
font-size: 1.53rem;
}
}
@media (max-width: 382px) {
body {
font-size: 1.35rem;
}
}
h1, h2, h3, h4, h5, h6 {
line-height: 1.1;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
font-weight: 700;
margin-top: 3rem;
margin-bottom: 1.5rem;
overflow-wrap: break-word;
word-wrap: break-word;
-ms-word-break: break-all;
word-break: break-word;
}
h1 {
font-size: 2.35em;
}
h2 {
font-size: 2.00em;
}
h3 {
font-size: 1.75em;
}
h4 {
font-size: 1.5em;
}
h5 {
font-size: 1.25em;
}
h6 {
font-size: 1em;
}
p {
margin-top: 0px;
margin-bottom: 2.5rem;
}
small, sub, sup {
font-size: 75%;
}
hr {
border-color: var(--color-blossom);
}
a {
text-decoration: none;
color: var(--color-blossom);
}
a:hover {
color: var(--color-fade);
border-bottom: 2px solid var(--color-text);
}
a:visited {
color: var(--color-blossom);
}
ul {
padding-left: 1.4em;
margin-top: 0px;
margin-bottom: 2.5rem;
}
li {
margin-bottom: 0.4em;
}
blockquote {
margin-left: 0px;
margin-right: 0px;
padding-left: 1em;
padding-top: 0.8em;
padding-bottom: 0.8em;
padding-right: 0.8em;
border-left: 5px solid var(--color-blossom);
margin-bottom: 2.5rem;
background-color: var(--color-bg-alt);
}
blockquote p {
margin-bottom: 0;
}
img, video {
height: auto;
max-width: 100%;
margin-top: 0px;
margin-bottom: 2.5rem;
}
/* Pre and Code */
pre {
background-color: var(--color-bg-alt);
display: block;
padding: 1em;
overflow-x: auto;
margin-top: 0px;
margin-bottom: 2.5rem;
}
code {
font-size: 0.9em;
padding: 0 0.5em;
background-color: var(--color-bg-alt);
white-space: pre-wrap;
}
pre > code {
padding: 0;
background-color: transparent;
white-space: pre;
}
/* Tables */
table {
text-align: justify;
width: 100%;
border-collapse: collapse;
}
td, th {
padding: 0.5em;
border-bottom: 1px solid var(--color-bg-alt);
}
/* Buttons, forms and input */
input, textarea {
border: 1px solid var(--color-text);
}
input:focus, textarea:focus {
border: 1px solid var(--color-blossom);
}
textarea {
width: 100%;
}
.button, button, input[type="submit"], input[type="reset"], input[type="button"] {
display: inline-block;
padding: 5px 10px;
text-align: center;
text-decoration: none;
white-space: nowrap;
background-color: var(--color-blossom);
color: var(--color-bg);
border-radius: 1px;
border: 1px solid var(--color-blossom);
cursor: pointer;
box-sizing: border-box;
}
.button[disabled], button[disabled], input[type="submit"][disabled], input[type="reset"][disabled], input[type="button"][disabled] {
cursor: default;
opacity: .5;
}
.button:focus:enabled, .button:hover:enabled, button:focus:enabled, button:hover:enabled, input[type="submit"]:focus:enabled, input[type="submit"]:hover:enabled, input[type="reset"]:focus:enabled, input[type="reset"]:hover:enabled, input[type="button"]:focus:enabled, input[type="button"]:hover:enabled {
background-color: var(--color-fade);
border-color: var(--color-fade);
color: var(--color-bg);
outline: 0;
}
textarea, select, input {
color: var(--color-text);
padding: 6px 10px;
/* The 6px vertically centers text on FF, ignored by Webkit */
margin-bottom: 10px;
background-color: var(--color-bg-alt);
border: 1px solid var(--color-bg-alt);
border-radius: 4px;
box-shadow: none;
box-sizing: border-box;
}
textarea:focus, select:focus, input:focus {
border: 1px solid var(--color-blossom);
outline: 0;
}
input[type="checkbox"]:focus {
outline: 1px dotted var(--color-blossom);
}
label, legend, fieldset {
display: block;
margin-bottom: .5rem;
font-weight: 600;
}

629
assets/wasm.js 100644
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@ -0,0 +1,629 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
(() => {
// Map multiple JavaScript environments to a single common API,
// preferring web standards over Node.js API.
//
// Environments considered:
// - Browsers
// - Node.js
// - Electron
// - Parcel
// - Webpack
if (typeof global !== "undefined") {
// global already exists
} else if (typeof window !== "undefined") {
window.global = window;
} else if (typeof self !== "undefined") {
self.global = self;
} else {
throw new Error("cannot export Go (neither global, window nor self is defined)");
}
if (!global.require && typeof require !== "undefined") {
global.require = require;
}
if (!global.fs && global.require) {
const fs = require("fs");
if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) {
global.fs = fs;
}
}
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!global.fs) {
let outputBuf = "";
global.fs = {
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substr(0, nl));
outputBuf = outputBuf.substr(nl + 1);
}
return buf.length;
},
write(fd, buf, offset, length, position, callback) {
if (offset !== 0 || length !== buf.length || position !== null) {
callback(enosys());
return;
}
const n = this.writeSync(fd, buf);
callback(null, n);
},
chmod(path, mode, callback) { callback(enosys()); },
chown(path, uid, gid, callback) { callback(enosys()); },
close(fd, callback) { callback(enosys()); },
fchmod(fd, mode, callback) { callback(enosys()); },
fchown(fd, uid, gid, callback) { callback(enosys()); },
fstat(fd, callback) { callback(enosys()); },
fsync(fd, callback) { callback(null); },
ftruncate(fd, length, callback) { callback(enosys()); },
lchown(path, uid, gid, callback) { callback(enosys()); },
link(path, link, callback) { callback(enosys()); },
lstat(path, callback) { callback(enosys()); },
mkdir(path, perm, callback) { callback(enosys()); },
open(path, flags, mode, callback) { callback(enosys()); },
read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
readdir(path, callback) { callback(enosys()); },
readlink(path, callback) { callback(enosys()); },
rename(from, to, callback) { callback(enosys()); },
rmdir(path, callback) { callback(enosys()); },
stat(path, callback) { callback(enosys()); },
symlink(path, link, callback) { callback(enosys()); },
truncate(path, length, callback) { callback(enosys()); },
unlink(path, callback) { callback(enosys()); },
utimes(path, atime, mtime, callback) { callback(enosys()); },
};
}
if (!global.process) {
global.process = {
getuid() { return -1; },
getgid() { return -1; },
geteuid() { return -1; },
getegid() { return -1; },
getgroups() { throw enosys(); },
pid: -1,
ppid: -1,
umask() { throw enosys(); },
cwd() { throw enosys(); },
chdir() { throw enosys(); },
}
}
if (!global.crypto && global.require) {
const nodeCrypto = require("crypto");
global.crypto = {
getRandomValues(b) {
nodeCrypto.randomFillSync(b);
},
};
}
if (!global.crypto) {
throw new Error("global.crypto is not available, polyfill required (getRandomValues only)");
}
if (!global.performance) {
global.performance = {
now() {
const [sec, nsec] = process.hrtime();
return sec * 1000 + nsec / 1000000;
},
};
}
if (!global.TextEncoder && global.require) {
global.TextEncoder = require("util").TextEncoder;
}
if (!global.TextEncoder) {
throw new Error("global.TextEncoder is not available, polyfill required");
}
if (!global.TextDecoder && global.require) {
global.TextDecoder = require("util").TextDecoder;
}
if (!global.TextDecoder) {
throw new Error("global.TextDecoder is not available, polyfill required");
}
// End of polyfills for common API.
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
global.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
if (code !== 0) {
console.warn("exit code:", code);
}
};
this._exitPromise = new Promise((resolve) => {
this._resolveExitPromise = resolve;
});
this._pendingEvent = null;
this._scheduledTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const setInt64 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
const getInt64 = (addr) => {
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = this.mem.getFloat64(addr, true);
if (f === 0) {
return undefined;
}
if (!isNaN(f)) {
return f;
}
const id = this.mem.getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number" && v !== 0) {
if (isNaN(v)) {
this.mem.setUint32(addr + 4, nanHead, true);
this.mem.setUint32(addr, 0, true);
return;
}
this.mem.setFloat64(addr, v, true);
return;
}
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
}
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
break;
case "string":
typeFlag = 2;
break;
case "symbol":
typeFlag = 3;
break;
case "function":
typeFlag = 4;
break;
}
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
this.mem.setUint32(addr, id, true);
}
const loadSlice = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
}
const loadSliceOfValues = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
const a = new Array(len);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
}
return a;
}
const loadString = (addr) => {
const saddr = getInt64(addr + 0);
const len = getInt64(addr + 8);
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
go: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// This changes the SP, thus we have to update the SP used by the imported function.
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
sp >>>= 0;
const code = this.mem.getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._goRefCounts;
delete this._ids;
delete this._idPool;
this.exit(code);
},
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
"runtime.wasmWrite": (sp) => {
sp >>>= 0;
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = this.mem.getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func resetMemoryDataView()
"runtime.resetMemoryDataView": (sp) => {
sp >>>= 0;
this.mem = new DataView(this._inst.exports.mem.buffer);
},
// func nanotime1() int64
"runtime.nanotime1": (sp) => {
sp >>>= 0;
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime() (sec int64, nsec int32)
"runtime.walltime": (sp) => {
sp >>>= 0;
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => {
this._resume();
while (this._scheduledTimeouts.has(id)) {
// for some reason Go failed to register the timeout event, log and try again
// (temporary workaround for https://github.com/golang/go/issues/28975)
console.warn("scheduleTimeoutEvent: missed timeout event");
this._resume();
}
},
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
));
this.mem.setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this.mem.getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
// func getRandomData(r []byte)
"runtime.getRandomData": (sp) => {
sp >>>= 0;
crypto.getRandomValues(loadSlice(sp + 8));
},
// func finalizeRef(v ref)
"syscall/js.finalizeRef": (sp) => {
sp >>>= 0;
const id = this.mem.getUint32(sp + 8, true);
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
}
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
sp >>>= 0;
storeValue(sp + 24, loadString(sp + 8));
},
// func valueGet(v ref, p string) ref
"syscall/js.valueGet": (sp) => {
sp >>>= 0;
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 32, result);
},
// func valueSet(v ref, p string, x ref)
"syscall/js.valueSet": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
},
// func valueDelete(v ref, p string)
"syscall/js.valueDelete": (sp) => {
sp >>>= 0;
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
sp >>>= 0;
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
},
// valueSetIndex(v ref, i int, x ref)
"syscall/js.valueSetIndex": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
},
// func valueCall(v ref, m string, args []ref) (ref, bool)
"syscall/js.valueCall": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const m = Reflect.get(v, loadString(sp + 16));
const args = loadSliceOfValues(sp + 32);
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, result);
this.mem.setUint8(sp + 64, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, err);
this.mem.setUint8(sp + 64, 0);
}
},
// func valueInvoke(v ref, args []ref) (ref, bool)
"syscall/js.valueInvoke": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueNew(v ref, args []ref) (ref, bool)
"syscall/js.valueNew": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueLength(v ref) int
"syscall/js.valueLength": (sp) => {
sp >>>= 0;
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
},
// valuePrepareString(v ref) (ref, int)
"syscall/js.valuePrepareString": (sp) => {
sp >>>= 0;
const str = encoder.encode(String(loadValue(sp + 8)));
storeValue(sp + 16, str);
setInt64(sp + 24, str.length);
},
// valueLoadString(v ref, b []byte)
"syscall/js.valueLoadString": (sp) => {
sp >>>= 0;
const str = loadValue(sp + 8);
loadSlice(sp + 16).set(str);
},
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
sp >>>= 0;
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
sp >>>= 0;
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
sp >>>= 0;
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
"debug": (value) => {
console.log(value);
},
}
};
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
throw new Error("Go.run: WebAssembly.Instance expected");
}
this._inst = instance;
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id
NaN,
0,
null,
true,
false,
global,
this,
];
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map([ // mapping from JS values to reference ids
[0, 1],
[null, 2],
[true, 3],
[false, 4],
[global, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
const strPtr = (str) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
offset += bytes.length;
if (offset % 8 !== 0) {
offset += 8 - (offset % 8);
}
return ptr;
};
const argc = this.argv.length;
const argvPtrs = [];
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
argvPtrs.push(0);
const keys = Object.keys(this.env).sort();
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
argvPtrs.push(0);
const argv = offset;
argvPtrs.forEach((ptr) => {
this.mem.setUint32(offset, ptr, true);
this.mem.setUint32(offset + 4, 0, true);
offset += 8;
});
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_resume() {
if (this.exited) {
throw new Error("Go program has already exited");
}
this._inst.exports.resume();
if (this.exited) {
this._resolveExitPromise();
}
}
_makeFuncWrapper(id) {
const go = this;
return function () {
const event = { id: id, this: this, args: arguments };
go._pendingEvent = event;
go._resume();
return event.result;
};
}
}
if (
typeof module !== "undefined" &&
global.require &&
global.require.main === module &&
global.process &&
global.process.versions &&
!global.process.versions.electron
) {
if (process.argv.length < 3) {
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
process.exit(1);
}
const go = new Go();
go.argv = process.argv.slice(2);
go.env = Object.assign({ TMPDIR: require("os").tmpdir() }, process.env);
go.exit = process.exit;
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
process.on("exit", (code) => { // Node.js exits if no event handler is pending
if (code === 0 && !go.exited) {
// deadlock, make Go print error and stack traces
go._pendingEvent = { id: 0 };
go._resume();
}
});
return go.run(result.instance);
}).catch((err) => {
console.error(err);
process.exit(1);
});
}
})();

18
cmd/pwa-spectre/main.go 100644
View File

@ -0,0 +1,18 @@
package main
import (
"flag"
"fmt"
"net/http"
"go.jolheiser.com/pwa-spectre/assets"
)
func main() {
portFlag := flag.Int("port", 9276, "port to listen on")
flag.Parse()
http.Handle("/", http.FileServer(http.FS(assets.Assets)))
fmt.Printf("http://localhost:%d\n", *portFlag)
http.ListenAndServe(fmt.Sprintf(":%d", *portFlag), nil)
}

7
go.mod 100644
View File

@ -0,0 +1,7 @@
module go.jolheiser.com/pwa-spectre
go 1.17
require go.jolheiser.com/go-spectre v0.1.1
require golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa // indirect

10
go.sum 100644
View File

@ -0,0 +1,10 @@
go.jolheiser.com/go-spectre v0.1.1 h1:TG9RhwOVH9PAamKdRBnObaudPZukOsk/ETh/knbgtww=
go.jolheiser.com/go-spectre v0.1.1/go.mod h1:YK9aGekEK8H5rNnnqVbwLFs9AWBeFl23PwjTD8wfdP4=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa h1:idItI2DDfCokpg0N51B2VtiLdJ4vAuXC9fnCb2gACo4=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

64
wasm/wasm.go 100644
View File

@ -0,0 +1,64 @@
package main
import (
"fmt"
"syscall/js"
"go.jolheiser.com/go-spectre"
)
const defaultScoper = "com.lyndir.masterpassword"
var Scoper string
//go:generate go build -ldflags "-X 'main.Scoper=$PWA_SPECTRE_SCOPER'" -o ../assets/spectre.wasm
func main() {
if Scoper == "" {
Scoper = defaultScoper
}
scoper := spectre.SimpleScoper{
Key: Scoper,
}
js.Global().Set("spectre", spectreWrapper(scoper))
js.Global().Set("defaultScoper", Scoper == defaultScoper)
fmt.Println("Spectre Init")
<-make(chan struct{})
}
func spectreWrapper(scoper spectre.Scoper) js.Func {
spectreFunc := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
if len(args) != 2 {
return "Invalid number of arguments"
}
s, err := spectre.New(args[0].String(), args[1].String(), spectre.WithScoper(scoper))
if err != nil {
return err.Error()
}
return map[string]interface{}{
// Site(site, counter, scope, template)
"Site": js.FuncOf(func(this js.Value, args []js.Value) interface{} {
if len(args) != 4 {
return "Invalid number of arguments"
}
scope, err := spectre.ParseScope(args[2].String())
if err != nil {
return err.Error()
}
template, err := spectre.ParseTemplate(args[3].String())
if err != nil {
return err.Error()
}
return s.Site(args[0].String(),
spectre.WithCounter(args[1].Int()),
spectre.WithScope(scope),
spectre.WithTemplate(template),
)
}),
}
})
return spectreFunc
}