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SSHPubkeyDecoder.prototype = {
lengthDecode: function(s, off)
{
var l = (s.charCodeAt(off++) << 24) |
(s.charCodeAt(off++) << 16) |
(s.charCodeAt(off++) << 8) |
s.charCodeAt(off++);
if (l < 0 || (off + l) > s.length)
return -1;
return l;
},
decode: function(s)
{
var parts = s.split(/\s+/);
if (parts.length < 2)
return null;
var key = null;
try { key = atob(parts[1]); } catch(e) {}
if (!key)
return null;
var off, len;
off = 0;
len = this.lengthDecode(key, off);
if (len <= 0)
return null;
var type = key.substr(off + 4, len);
if (type !== parts[0])
return null;
off += 4 + len;
var len1 = off < key.length ? this.lengthDecode(key, off) : 0;
if (len1 <= 0)
return null;
var curve = null;
if (type.indexOf('ecdsa-sha2-') === 0) {
curve = key.substr(off + 4, len1);
if (!len1 || type.substr(11) !== curve)
return null;
type = 'ecdsa-sha2';
curve = curve.replace(/^nistp(\d+)$/, 'NIST P-$1');
}
off += 4 + len1;
var len2 = off < key.length ? this.lengthDecode(key, off) : 0;
if (len2 < 0)
return null;
if (len1 & 1)
len1--;
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];
switch (type)
{
case 'ssh-rsa':
return { type: 'RSA', bits: len2 * 8, comment: comment, fprint: fprint };
case 'ssh-dss':
return { type: 'DSA', bits: len1 * 8, comment: comment, fprint: fprint };
case 'ssh-ed25519':
return { type: 'ECDH', curve: 'Curve25519', comment: comment, fprint: fprint };
case 'ecdsa-sha2':
return { type: 'ECDSA', curve: curve, comment: comment, fprint: fprint };
default:
return null;
}
}
};
function SSHPubkeyDecoder() {}
function renderKeys(keys) {
var list = document.querySelector('.cbi-dynlist[name="sshkeys"]'),
decoder = new SSHPubkeyDecoder();
while (!matchesElem(list.firstElementChild, '.add-item'))
list.removeChild(list.firstElementChild);
keys.forEach(function(key) {
var pubkey = decoder.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);
});
if (list.firstElementChild === list.lastElementChild)
list.insertBefore(E('p', _('No public keys present yet.')), list.lastElementChild);
}
function saveKeys(keys) {
L.showModal(_('Add key'), E('div', { class: 'spinning' }, _('Saving keys…')));
L.post('admin/system/admin/sshkeys/json', { keys: JSON.stringify(keys) }, function(xhr, keys) {
renderKeys(keys);
L.hideModal();
});
}
function addKey(ev) {
var decoder = new SSHPubkeyDecoder(),
list = findParent(ev.target, '.cbi-dynlist'),
input = list.querySelector('input[type="text"]'),
key = input.value.trim(),
pubkey = decoder.decode(key),
keys = [];
if (!key.length)
return;
list.querySelectorAll('.item').forEach(function(item) {
keys.push(item.getAttribute('data-key'));
});
if (keys.indexOf(key) !== -1) {
L.showModal(_('Add key'), [
E('div', { class: 'alert-message warning' }, _('The given SSH public key has already been added.')),
E('div', { class: 'right' }, E('div', { class: 'btn', click: L.hideModal }, _('Close')))
]);
}
else if (!pubkey) {
L.showModal(_('Add key'), [
E('div', { class: 'alert-message warning' }, _('The given SSH public key is invalid. Please supply proper public RSA or ECDSA keys.')),
E('div', { class: 'right' }, E('div', { class: 'btn', click: L.hideModal }, _('Close')))
]);
}
else {
keys.push(key);
saveKeys(keys);
input.value = '';
}
}
function removeKey(ev) {
var list = findParent(ev.target, '.cbi-dynlist'),
delkey = ev.target.getAttribute('data-key'),
keys = [];
list.querySelectorAll('.item').forEach(function(item) {
var key = item.getAttribute('data-key');
if (key !== delkey)
keys.push(key);
});
L.showModal(_('Delete key'), [
E('div', _('Do you really want to delete the following SSH key?')),
E('pre', delkey),
E('div', { class: 'right' }, [
E('div', { class: 'btn', click: L.hideModal }, _('Cancel')),
' ',
E('div', { class: 'btn danger', click: function(ev) { saveKeys(keys) } }, _('Delete key')),
])
]);
}
function dragKey(ev) {
ev.stopPropagation();
ev.preventDefault();
ev.dataTransfer.dropEffect = 'copy';
}
function dropKey(ev) {
var file = ev.dataTransfer.files[0],
input = ev.currentTarget.querySelector('input[type="text"]'),
reader = new FileReader();
if (file) {
reader.onload = function(rev) {
input.value = rev.target.result.trim();
addKey(ev);
input.value = '';
};
reader.readAsText(file);
}
ev.stopPropagation();
ev.preventDefault();
}
window.addEventListener('dragover', function(ev) { ev.preventDefault() });
window.addEventListener('drop', function(ev) { ev.preventDefault() });
requestAnimationFrame(function() {
L.get('admin/system/admin/sshkeys/json', null, function(xhr, keys) {
renderKeys(keys);
});
});
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