/usr/lib/nodejs/node-xmpp/lib/xmpp/server.js is in node-node-xmpp 0.3.2-3build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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var Connection = require('./connection');
var ltx = require('ltx');
var util = require('util');
var SRV = require('./srv');
var NS_SERVER = 'jabber:server';
var NS_DIALBACK = 'jabber:server:dialback';
var NS_XMPP_SASL = 'urn:ietf:params:xml:ns:xmpp-sasl';
/**
* Dialback-specific events:
* (1) dialbackKey(from, to, key)
* (2) dialbackVerify(from, to, id, key)
* (3) dialbackVerified(from, to, id, isValid)
* (4) dialbackResult(from, to, isValid)
*/
function Server(socket) {
var self = this;
Connection.Connection.call(this, socket);
this.xmlns[''] = NS_SERVER;
this.xmlns['db'] = NS_DIALBACK;
this.xmppVersion = '1.0';
this.addListener('rawStanza', function(stanza) {
var key = stanza.getText();
if (stanza.is('result', NS_DIALBACK)) {
if (stanza.attrs.from && stanza.attrs.to &&
stanza.attrs.type) {
self.emit('dialbackResult',
stanza.attrs.from, stanza.attrs.to,
stanza.attrs.type == 'valid');
} else if (stanza.attrs.from && stanza.attrs.to) {
self.emit('dialbackKey',
stanza.attrs.from, stanza.attrs.to,
key);
}
} else if (stanza.is('verify', NS_DIALBACK)) {
if (stanza.attrs.from && stanza.attrs.to &&
stanza.attrs.id && stanza.attrs.type) {
self.emit('dialbackVerified',
stanza.attrs.from, stanza.attrs.to,
stanza.attrs.id, stanza.attrs.type == 'valid');
} else if (stanza.attrs.from && stanza.attrs.to &&
stanza.attrs.id) {
self.emit('dialbackVerify',
stanza.attrs.from, stanza.attrs.to,
stanza.attrs.id, key);
}
} else
self.emit('stanza', stanza);
});
}
util.inherits(Server, Connection.Connection);
exports.dialbackKey = function(from, to, key) {
return new ltx.Element('db:result', { to: to,
from: from }).
t(key);
};
exports.dialbackVerify = function(from, to, id, key) {
return new ltx.Element('db:verify', { to: to,
from: from,
id: id }).
t(key);
};
exports.dialbackVerified = function(from, to, id, isValid) {
return new ltx.Element('db:verify', { to: to,
from: from,
id: id,
type: isValid ? 'valid' : 'invalid' });
};
exports.dialbackResult = function(from, to, isValid) {
return new ltx.Element('db:result', { to: to,
from: from,
type: isValid ? 'valid' : 'invalid' });
};
exports.IncomingServer = function(stream, credentials) {
var self = this;
Server.call(this, stream);
this.startParser();
this.streamId = generateId();
this.addListener('streamStart', function(streamAttrs) {
if (streamAttrs.to &&
credentials &&
credentials.hasOwnProperty(streamAttrs.to))
// TLS cert & key for this domain
self.credentials = credentials[streamAttrs.to];
// No credentials means we cannot <starttls/> on the server
// side. Unfortunately this is required for XMPP 1.0.
if (!self.credentials)
delete self.xmppVersion;
self.startStream();
});
this.addListener('rawStanza', function(stanza) {
if (stanza.is('starttls', Connection.NS_XMPP_TLS)) {
self.send(new ltx.Element('proceed', { xmlns: Connection.NS_XMPP_TLS }));
self.setSecure(self.credentials, true);
}
});
return self;
};
util.inherits(exports.IncomingServer, Server);
exports.IncomingServer.prototype.startStream = function() {
Server.prototype.startStream.call(this);
if (this.xmppVersion == '1.0') {
this.send("<stream:features>");
if (this.credentials && !this.isSecure)
this.send("<starttls xmlns='" + Connection.NS_XMPP_TLS + "'/>");
this.send("</stream:features>");
}
};
exports.OutgoingServer = function(srcDomain, destDomain, credentials) {
var self = this;
Server.call(this);
this.streamTo = destDomain;
// For outgoing, we only need our own cert & key
this.credentials = credentials;
// No credentials means we cannot <starttls/> on the server
// side. Unfortunately this is required for XMPP 1.0.
if (!this.credentials)
delete this.xmppVersion;
this.socket.addListener('secure', function() {
self.startStream();
});
this.addListener('streamStart', function(attrs) {
if (attrs.version !== "1.0")
// Don't wait for <stream:features/>
self.emit('auth', 'dialback');
});
self.addListener('rawStanza', function(stanza) {
if (stanza.is('features', Connection.NS_STREAM)) {
var mechsEl;
if ((mechsEl = stanza.getChild('mechanisms', NS_XMPP_SASL))) {
var mechs = mechsEl.getChildren('mechanism', NS_XMPP_SASL).
map(function(el) { return el.getText(); });
if (mechs.indexOf('EXTERNAL') >= 0)
self.emit('auth', 'external');
else
self.emit('auth', 'dialback');
} else {
// No SASL mechanisms
self.emit('auth', 'dialback');
}
}
});
var attempt = SRV.connect(this.socket, ['_xmpp-server._tcp',
'_jabber._tcp'],
destDomain, 5269);
attempt.addListener('connect', function() {
self.startParser();
self.startStream();
});
attempt.addListener('error', function(e) {
self.emit('error', e);
});
};
util.inherits(exports.OutgoingServer, Server);
function generateId() {
var r = new Buffer(16);
for(var i = 0; i < r.length; i++) {
r[i] = 48 + Math.floor(Math.random() * 10); // '0'..'9'
}
return r.toString();
};
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