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luci-mod-system: fix parsing SSH pubkeys with options

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Also eliminate some duplicate code while we're at it.

Fixes: #4684
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(backported from commit 846b89c5bf)
This commit is contained in:
Jo-Philipp Wich 2020-12-23 15:31:58 +01:00
parent 1c67ae2302
commit 24550446ca
1 changed files with 47 additions and 38 deletions
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85
modules/luci-mod-system/htdocs/luci-static/resources/view/system/sshkeys.js
View file

@ -19,12 +19,13 @@ var SSHPubkeyDecoder = L.Class.singleton({
decode: function(s)
{
var parts = s.split(/\s+/);
if (parts.length < 2)
var parts = s.trim().match(/^((?:(?:^|,)[^ =,]+(?:=(?:[^ ",]+|"(?:[^"\\]|\\.)*"))?)+ +)?(ssh-dss|ssh-rsa|ssh-ed25519|ecdsa-sha2-nistp[0-9]+) +([^ ]+)( +.*)?$/);
if (!parts)
return null;
var key = null;
try { key = atob(parts[1]); } catch(e) {}
try { key = atob(parts[3]); } catch(e) {}
if (!key)
return null;
@ -37,7 +38,7 @@ var SSHPubkeyDecoder = L.Class.singleton({
return null;
var type = key.substr(off + 4, len);
if (type !== parts[0])
if (type !== parts[2])
return null;
off += 4 + len;
@ -69,22 +70,32 @@ var SSHPubkeyDecoder = L.Class.singleton({
if (len2 & 1)
len2--;
var comment = parts.slice(2).join(' '),
fprint = parts[1].length > 68 ? parts[1].substr(0, 33) + '…' + parts[1].substr(-34) : parts[1];
var comment = (parts[4] || '').trim(),
fprint = parts[3].length > 68 ? parts[3].substr(0, 33) + '…' + parts[3].substr(-34) : parts[3];
var options = null;
(parts[1] || '').trim().replace(/(?:^|,)([^ =,]+)(?:=(?:([^ ",]+)|"((?:[^"\\]|\\.)*)"))?/g, function(m, k, p, q) {
options = options || {};
if (options.hasOwnProperty(k))
options[k] += ',' + (q || p || true);
else
options[k] = (q || p || true);
});
switch (type)
{
case 'ssh-rsa':
return { type: 'RSA', bits: len2 * 8, comment: comment, fprint: fprint };
return { type: 'RSA', bits: len2 * 8, comment: comment, options: options, fprint: fprint, src: s };
case 'ssh-dss':
return { type: 'DSA', bits: len1 * 8, comment: comment, fprint: fprint };
return { type: 'DSA', bits: len1 * 8, comment: comment, options: options, fprint: fprint, src: s };
case 'ssh-ed25519':
return { type: 'ECDH', curve: 'Curve25519', comment: comment, fprint: fprint };
return { type: 'ECDH', curve: 'Curve25519', comment: comment, options: options, fprint: fprint, src: s };
case 'ecdsa-sha2':
return { type: 'ECDSA', curve: curve, comment: comment, fprint: fprint };
return { type: 'ECDSA', curve: curve, comment: comment, options: options, fprint: fprint, src: s };
default:
return null;
@ -92,6 +103,24 @@ var SSHPubkeyDecoder = L.Class.singleton({
}
});
function renderKeyItem(pubkey) {
return E('div', {
class: 'item',
click: isReadonlyView ? null : removeKey,
'data-key': pubkey.src
}, [
E('strong', pubkey.comment || _('Unnamed key')), E('br'),
E('small', [
'%s, %s'.format(pubkey.type, pubkey.curve || _('%d Bit').format(pubkey.bits)),
pubkey.options ? E([], [
' / ', _('Options:'), ' ',
E('code', Object.keys(pubkey.options).sort().join(', '))
]) : '',
E('br'), E('code', pubkey.fprint)
])
]);
}
function renderKeys(keys) {
var list = document.querySelector('.cbi-dynlist');
@ -101,17 +130,7 @@ function renderKeys(keys) {
keys.forEach(function(key) {
var pubkey = SSHPubkeyDecoder.decode(key);
if (pubkey)
list.insertBefore(E('div', {
class: 'item',
click: removeKey,
'data-key': key
}, [
E('strong', pubkey.comment || _('Unnamed key')), E('br'),
E('small', [
'%s, %s'.format(pubkey.type, pubkey.curve || _('%d Bit').format(pubkey.bits)),
E('br'), E('code', pubkey.fprint)
])
]), list.lastElementChild);
list.insertBefore(renderKeyItem(pubkey), list.lastElementChild);
});
if (list.firstElementChild === list.lastElementChild)
@ -156,7 +175,7 @@ function addKey(ev) {
input.value = '';
return saveKeys(keys).then(function() {
var added = list.querySelector('[data-key="%s"]'.format(key));
var added = list.querySelector('[data-key="%s"]'.format(key.replace(/["\\]/g, '\\$&')));
if (added)
added.classList.add('flash');
});
@ -217,8 +236,10 @@ function handleWindowDragDropIgnore(ev) {
return view.extend({
load: function() {
return fs.lines('/etc/dropbear/authorized_keys').then(function(lines) {
return lines.filter(function(line) {
return line.match(/^(ssh-rsa|ssh-dss|ssh-ed25519|ecdsa-sha2)\b/) != null;
return lines.map(function(line) {
return SSHPubkeyDecoder.decode(line);
}).filter(function(line) {
return line != null;
});
});
},
@ -239,20 +260,8 @@ return view.extend({
])
]);
keys.forEach(L.bind(function(key) {
var pubkey = SSHPubkeyDecoder.decode(key);
if (pubkey)
list.insertBefore(E('div', {
class: 'item',
click: ui.createHandlerFn(this, removeKey),
'data-key': key
}, [
E('strong', pubkey.comment || _('Unnamed key')), E('br'),
E('small', [
'%s, %s'.format(pubkey.type, pubkey.curve || _('%d Bit').format(pubkey.bits)),
E('br'), E('code', pubkey.fprint)
])
]), list.lastElementChild);
keys.forEach(L.bind(function(pubkey) {
list.insertBefore(renderKeyItem(pubkey), list.lastElementChild);
}, this));
if (list.firstElementChild === list.lastElementChild)