mirror of
https://github.com/M66B/FairEmail.git
synced 2024-12-21 23:32:51 +00:00
243 lines
8.3 KiB
HTML
243 lines
8.3 KiB
HTML
<!doctype html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>FairEmail - Decrypt</title>
|
|
<link rel="shortcut icon" href="https://raw.githubusercontent.com/M66B/FairEmail/master/app/src/main/ic_launcher-web.png">
|
|
|
|
<meta name="theme-color" content="#006db3">
|
|
<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
|
|
<meta name="description" content="Decrypt password protected content">
|
|
<meta name="author" content="M66B">
|
|
<meta name="robots" content="noindex">
|
|
|
|
<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
|
|
<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/Sources#sources -->
|
|
<meta
|
|
http-equiv="Content-Security-Policy"
|
|
content="default-src 'self' 'unsafe-inline'; img-src data: https://raw.githubusercontent.com/M66B/FairEmail/master/app/src/main/ic_launcher-web.png;">
|
|
|
|
<style>
|
|
body { padding-left: 10px; padding-right: 10px; font-family: Arial, Helvetica, sans-serif; }
|
|
.button { display: inline-block; text-align: center; cursor: pointer; }
|
|
.button span:first-child { font-size: x-large; }
|
|
.button span:last-child { font-size: smaller; }
|
|
</style>
|
|
|
|
<style>
|
|
.noscript { display: none; }
|
|
</style>
|
|
<noscript>
|
|
<style>
|
|
.noscript { display: block; }
|
|
</style>
|
|
</noscript>
|
|
|
|
<!-- https://github.com/cure53/DOMPurify 2.4.0 -->
|
|
<script src="purify.min.js"></script>
|
|
|
|
<script>
|
|
window.addEventListener('load', load);
|
|
|
|
function load() {
|
|
const form = document.getElementById('form')
|
|
const message = document.getElementById('message');
|
|
const copy = document.getElementById('copy');
|
|
const email = document.getElementById('email');
|
|
const close = document.getElementById('close');
|
|
const error = document.getElementById('error');
|
|
const details = document.getElementById('details');
|
|
const year = document.getElementById('year');
|
|
|
|
form.addEventListener('submit', submit);
|
|
|
|
if (window.location.hash)
|
|
if (crypto.subtle &&
|
|
typeof Uint8Array === 'function' &&
|
|
typeof TextEncoder === 'function') {
|
|
form.style.display = 'block';
|
|
form.password.focus();
|
|
}
|
|
else {
|
|
error.textContent = 'Your browser is unsuitable for decrypting content';
|
|
error.style.display = 'block';
|
|
details.innerHTML =
|
|
'crypto.subtle: ' + (crypto.subtle ? 'Yes' : 'No') + '<br>' +
|
|
'Uint8Array: ' + (Uint8Array ? 'Yes' : 'No') + '<br>' +
|
|
'TextEncoder: ' + (TextEncoder ? 'Yes' : 'No') + '<br>';
|
|
details.style.display = 'block';
|
|
}
|
|
else {
|
|
error.textContent = 'Nothing to see here';
|
|
error.style.display = 'block';
|
|
}
|
|
|
|
copy.onclick = function (event) {
|
|
event.preventDefault();
|
|
|
|
const blob = new Blob([message.innerHTML], { type: 'text/html' });
|
|
const clip = new ClipboardItem({ 'text/html': blob });
|
|
|
|
navigator.clipboard.write([clip]).then(function() {
|
|
alert('Copied to clipboard');
|
|
}, function() {
|
|
alert('Copy failed');
|
|
});
|
|
}
|
|
|
|
email.onclick = function (event) {
|
|
event.preventDefault();
|
|
window.location.href = "mailto:?body=" + encodeURIComponent(message.textContent);
|
|
}
|
|
|
|
close.onclick = function (event) {
|
|
event.preventDefault();
|
|
form.fields.disabled = false;
|
|
form.style.display = 'block';
|
|
content.style.display = 'none';
|
|
message.innerHTML = '';
|
|
form.password.focus();
|
|
}
|
|
|
|
year.textContent = new Date().getFullYear();
|
|
}
|
|
|
|
function submit(event) {
|
|
event.preventDefault();
|
|
decrypt();
|
|
}
|
|
|
|
async function decrypt() {
|
|
const form = document.getElementById('form')
|
|
const content = document.getElementById('content');
|
|
const message = document.getElementById('message');
|
|
const error = document.getElementById('error');
|
|
const details = document.getElementById('details');
|
|
|
|
try {
|
|
form.fields.disabled = true;
|
|
content.style.display = 'none';
|
|
error.style.display = 'none';
|
|
details.style.display = 'none';
|
|
|
|
if (!form.password.value)
|
|
throw new Error('Password required');
|
|
|
|
const dirty = await _decrypt(form.password.value);
|
|
const clean = DOMPurify.sanitize(dirty, { USE_PROFILES: { html: true }, SANITIZE_NAMED_PROPS: true });
|
|
|
|
form.password.value = '';
|
|
message.innerHTML = clean;
|
|
|
|
var a = message.getElementsByTagName('a');
|
|
for (let i = 0; i < a.length; i++)
|
|
if (a[i].href) {
|
|
a[i].rel = 'noopener noreferrer';
|
|
a[i].setAttribute('target', '_blank');
|
|
a[i].onclick = function() {
|
|
return confirm('Go to ' + a[i].href + ' ?');
|
|
};
|
|
}
|
|
|
|
form.style.display = 'none';
|
|
content.style.display = 'block';
|
|
} catch (e) {
|
|
console.log("%O", e);
|
|
form.fields.disabled = false;
|
|
form.password.value = '';
|
|
form.password.focus();
|
|
error.textContent = 'Could not decrypt the message. Is the password correct?';
|
|
error.style.display = 'block';
|
|
details.textContent = e.toString();
|
|
details.style.display = 'block';
|
|
}
|
|
}
|
|
|
|
async function _decrypt(password) {
|
|
const msg = atob(window.location.hash.substr(1).replaceAll('-', '+').replaceAll('_', '/'));
|
|
|
|
const buf = new Uint8Array(msg.length);
|
|
for (let i = 0; i < msg.length; i++)
|
|
buf[i] = msg.charCodeAt(i);
|
|
|
|
const version = buf[0];
|
|
const salt = buf.slice(1, 1 + 16);
|
|
const iv = buf.slice(1 + 16, 1 + 16 + 12);
|
|
const e = buf.slice(1 + 16 + 12, buf.length);
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/Crypto/subtle
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder
|
|
const passwordBuffer = new TextEncoder('UTF-8').encode(password);
|
|
const importedKey = await crypto.subtle.importKey('raw', passwordBuffer, 'PBKDF2', false, ['deriveBits']);
|
|
const derivation = await crypto.subtle.deriveBits({name: 'PBKDF2', hash: 'SHA-512', salt: salt, iterations: 120000}, importedKey, 256);
|
|
const importedEncryptionKey = await crypto.subtle.importKey('raw', derivation, {name: 'AES-GCM'}, false, ['decrypt']);
|
|
const decrypted = await crypto.subtle.decrypt({name: 'AES-GCM', iv: iv, tagLength: 128}, importedEncryptionKey, e);
|
|
|
|
return new TextDecoder('UTF-8').decode(decrypted);
|
|
}
|
|
</script>
|
|
</head>
|
|
<body>
|
|
<p class="noscript" style="color: red; font-weight: bold;">Please enable JavaScript</p>
|
|
|
|
<form id="form" action="#" method="GET" style="display: none;">
|
|
<p>
|
|
Someone sent you password protected content with <a href="https://email.faircode.eu/" target="_blank">FairEmail</a>.
|
|
</p>
|
|
<p>
|
|
The sender should have provided the password.
|
|
</p>
|
|
<hr>
|
|
<fieldset id="fields" style="border:0 none; margin: 0; padding: 0;">
|
|
<p>
|
|
<label for="password">Enter password 🔑</label><br>
|
|
<input id="password" name="password" type="password" required><br>
|
|
<span style="font-size: smaller;">Passwords are case-sensitive </span>
|
|
</p>
|
|
<p>
|
|
<input id="submit" style="padding: 3px;" type="submit" value="🔓 Decrypt">
|
|
</p>
|
|
</fieldset>
|
|
<p style="font-size: smaller;">
|
|
Passwords, encrypted, and decrypted content stay in your own browser. See <a href="https://github.com/M66B/FairEmail/blob/master/FAQ.md#user-content-faq184" target="_blank">here</a> for more information.
|
|
</p>
|
|
<hr>
|
|
</form>
|
|
|
|
<div id="content" style="display: none; width: 100%;">
|
|
<p>The sender sent you this password protected content with <a href="https://email.faircode.eu/" target="_blank">FairEmail</a>:</p>
|
|
|
|
<hr style="margin-top: 30px;">
|
|
<p id="message" style="width: 100%; font-size: larger;"></p>
|
|
<hr style="margin-bottom: 30px;">
|
|
|
|
<div>
|
|
<div id="copy" class="button">
|
|
<span>📋</span><br>
|
|
<span>Copy</span>
|
|
</div>
|
|
 
|
|
<div id="email" class="button">
|
|
<span>📧</span><br>
|
|
<span>Email</span>
|
|
</div>
|
|
 
|
|
<div id="close" class="button">
|
|
<span>✕</span><br>
|
|
<span>Close</span>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<p id="error" style="color: red; font-weight: bold; display: none;"></p>
|
|
|
|
<p id="details" style="font-size: x-small; display: none;"></p>
|
|
|
|
<p style="padding-top: 30px;">
|
|
Copyright © 2018–<span id="year">2022</span> by Marcel Bokhorst (M66B)
|
|
<br>
|
|
<br>
|
|
<span style="font-size: smaller;">This page is <a href="https://github.com/M66B/FairEmail/blob/master/decrypt/index.html" target="_blank">open source</a>.</span>
|
|
</p>
|
|
</body>
|
|
</html>
|