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Code Issues Releases Wiki Activity

Decrypt page improvements

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This commit is contained in:
M66B 2022-10-17 15:33:51 +02:00
parent d3145095d2
commit 6d1a93b314
1 changed files with 47 additions and 31 deletions
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78
decrypt/index.html
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@ -30,61 +30,77 @@
window.addEventListener('load', load);
function load() {
document.getElementById('getpassword').addEventListener('submit', getpassword);
let form = document.getElementById('form')
let password = document.getElementById('password');
let message = document.getElementById('message');
let error = document.getElementById('error');
let details = document.getElementById('details');
form.addEventListener('submit', submit);
if (window.location.hash)
if (crypto.subtle &&
typeof Uint8Array === 'function' &&
typeof TextEncoder === 'function') {
document.getElementById('getpassword').style.display = 'block';
document.getElementById('password').focus();
form.style.display = 'block';
password.focus();
}
else {
document.getElementById('error').textContent = 'Your browser is not suitable for decrypting messages';
document.getElementById('error').style.display = 'block';
document.getElementById('details').innerHTML =
error.textContent = 'Your browser is unsuitable for decrypting text';
error.style.display = 'block';
details.innerHTML =
'crypto.subtle: ' + (crypto.subtle ? 'Yes' : 'No') + '<br>' +
'Uint8Array: ' + (Uint8Array ? 'Yes' : 'No') + '<br>' +
'TextEncoder: ' + (TextEncoder ? 'Yes' : 'No') + '<br>';
document.getElementById('details').style.display = 'block';
details.style.display = 'block';
}
else {
document.getElementById('message').textContent = 'Nothing to see here';
document.getElementById('message').style.display = 'block';
message.innerHTML = 'Nothing to see here';
message.style.display = 'block';
}
document.getElementById('year').textContent = new Date().getFullYear();
}
function getpassword(event) {
function submit(event) {
event.preventDefault();
decrypt();
}
async function decrypt() {
document.getElementById('fields').disabled = true;
let fields = document.getElementById('fields');
let form = document.getElementById('form')
let password = document.getElementById('password');
let message = document.getElementById('message');
let error = document.getElementById('error');
let details = document.getElementById('details');
let copyright = document.getElementById('copyright');
try {
document.getElementById('message').style.display = 'none';
document.getElementById('error').style.display = 'none';
document.getElementById('details').style.display = 'none';
let password = document.getElementById('password').value;
if (password) {
let message = await _decrypt(password);
document.getElementById('getpassword').style.display = 'none';
document.getElementById('message').innerHTML = message;
document.getElementById('message').style.display = 'block';
document.getElementById('copyright').style.display = 'none';
}
else
fields.disabled = true;
message.style.display = 'none';
error.style.display = 'none';
details.style.display = 'none';
if (!password.value)
throw new Error('Password required');
let html = await _decrypt(password.value);
form.style.display = 'none';
message.innerHTML = html;
message.style.display = 'block';
copyright.style.display = 'none';
} catch (e) {
console.log("%O", e);
document.getElementById('password').value = '';
document.getElementById('error').textContent = 'Could not decrypt the message. Is the password correct?';
document.getElementById('error').style.display = 'block';
document.getElementById('details').textContent = e.toString();
document.getElementById('details').style.display = 'block';
fields.disabled = false;
password.value = '';
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';
}
document.getElementById('fields').disabled = false;
}
async function _decrypt(password) {
@ -105,7 +121,7 @@
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 window.crypto.subtle.decrypt({name: 'AES-GCM', iv: iv, tagLength: 128}, importedEncryptionKey, e);
const decrypted = await crypto.subtle.decrypt({name: 'AES-GCM', iv: iv, tagLength: 128}, importedEncryptionKey, e);
return new TextDecoder('UTF-8').decode(decrypted);
}
@ -114,7 +130,7 @@
<body>
<p class="noscript" style="color: red; font-weight: bold;">Please enable JavaScript</p>
<form id="getpassword" action="#" method="GET" style="display: none;">
<form id="form" action="#" method="GET" style="display: none;">
<p>
Someone sent you password protected text with <a href="https://email.faircode.eu/" target="_blank">FairEmail</a>.
</p>