Mercurial > xmppjs / changeset

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sha1.js	Tue Feb 02 23:31:00 2010 +0000
@@ -0,0 +1,208 @@
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+ * in FIPS PUB 180-1
+ * Version 2.1a Copyright Paul Johnston 2000 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Modifications by Matthew Wild to export functions for CommonJS
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for details.
+ */
+
+/*
+ * Configurable variables. You may need to tweak these to be compatible with
+ * the server-side, but the defaults work in most cases.
+ */
+var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
+var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
+var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */
+
+/*
+ * These are the functions you'll usually want to call
+ * They take string arguments and return either hex or base-64 encoded strings
+ */
+exports.hex = function (s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
+exports.b64 = function (s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
+exports.str = function (s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
+exports.hex_hmac = function (key, data){ return binb2hex(core_hmac_sha1(key, data));}
+exports.b64_hmac = function (key, data){ return binb2b64(core_hmac_sha1(key, data));}
+exports.str_hmac = function (key, data){ return binb2str(core_hmac_sha1(key, data));}
+
+/*
+ * Perform a simple self-test to see if the VM is working
+ */
+function sha1_vm_test()
+{
+  return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
+}
+
+/*
+ * Calculate the SHA-1 of an array of big-endian words, and a bit length
+ */
+function core_sha1(x, len)
+{
+  /* append padding */
+  x[len >> 5] |= 0x80 << (24 - len % 32);
+  x[((len + 64 >> 9) << 4) + 15] = len;
+
+  var w = new Array(80);
+  var a =  1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d =  271733878;
+  var e = -1009589776;
+
+  var i, j, t, olda, oldb, oldc, oldd, olde;
+  for (i = 0; i < x.length; i += 16)
+  {
+    olda = a;
+    oldb = b;
+    oldc = c;
+    oldd = d;
+    olde = e;
+
+    for (j = 0; j < 80; j++)
+    {
+      if (j < 16) { w[j] = x[i + j]; }
+      else { w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1); }
+      t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
+                       safe_add(safe_add(e, w[j]), sha1_kt(j)));
+      e = d;
+      d = c;
+      c = rol(b, 30);
+      b = a;
+      a = t;
+    }
+
+    a = safe_add(a, olda);
+    b = safe_add(b, oldb);
+    c = safe_add(c, oldc);
+    d = safe_add(d, oldd);
+    e = safe_add(e, olde);
+  }
+  return [a, b, c, d, e];
+}
+
+/*
+ * Perform the appropriate triplet combination function for the current
+ * iteration
+ */
+function sha1_ft(t, b, c, d)
+{
+  if (t < 20) { return (b & c) | ((~b) & d); }
+  if (t < 40) { return b ^ c ^ d; }
+  if (t < 60) { return (b & c) | (b & d) | (c & d); }
+  return b ^ c ^ d;
+}
+
+/*
+ * Determine the appropriate additive constant for the current iteration
+ */
+function sha1_kt(t)
+{
+  return (t < 20) ?  1518500249 : (t < 40) ?  1859775393 :
+         (t < 60) ? -1894007588 : -899497514;
+}
+
+/*
+ * Calculate the HMAC-SHA1 of a key and some data
+ */
+function core_hmac_sha1(key, data)
+{
+  var bkey = str2binb(key);
+  if (bkey.length > 16) { bkey = core_sha1(bkey, key.length * chrsz); }
+
+  var ipad = new Array(16), opad = new Array(16);
+  for (var i = 0; i < 16; i++)
+  {
+    ipad[i] = bkey[i] ^ 0x36363636;
+    opad[i] = bkey[i] ^ 0x5C5C5C5C;
+  }
+
+  var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
+  return core_sha1(opad.concat(hash), 512 + 160);
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safe_add(x, y)
+{
+  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return (msw << 16) | (lsw & 0xFFFF);
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function rol(num, cnt)
+{
+  return (num << cnt) | (num >>> (32 - cnt));
+}
+
+/*
+ * Convert an 8-bit or 16-bit string to an array of big-endian words
+ * In 8-bit function, characters >255 have their hi-byte silently ignored.
+ */
+function str2binb(str)
+{
+  var bin = [];
+  var mask = (1 << chrsz) - 1;
+  for (var i = 0; i < str.length * chrsz; i += chrsz)
+  {
+    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i%32);
+  }
+  return bin;
+}
+
+/*
+ * Convert an array of big-endian words to a string
+ */
+function binb2str(bin)
+{
+  var str = "";
+  var mask = (1 << chrsz) - 1;
+  for (var i = 0; i < bin.length * 32; i += chrsz)
+  {
+    str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
+  }
+  return str;
+}
+
+/*
+ * Convert an array of big-endian words to a hex string.
+ */
+function binb2hex(binarray)
+{
+  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+  var str = "";
+  for (var i = 0; i < binarray.length * 4; i++)
+  {
+    str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
+           hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
+  }
+  return str;
+}
+
+/*
+ * Convert an array of big-endian words to a base-64 string
+ */
+function binb2b64(binarray)
+{
+  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+  var str = "";
+  var triplet, j;
+  for (var i = 0; i < binarray.length * 4; i += 3)
+  {
+    triplet = (((binarray[i   >> 2] >> 8 * (3 -  i   %4)) & 0xFF) << 16) |
+              (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 ) |
+               ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
+    for (j = 0; j < 4; j++)
+    {
+      if (i * 8 + j * 6 > binarray.length * 32) { str += b64pad; }
+      else { str += tab.charAt((triplet >> 6*(3-j)) & 0x3F); }
+    }
+  }
+  return str;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xmpp.js	Tue Feb 02 23:31:00 2010 +0000
@@ -0,0 +1,319 @@
+// Node libs
+var tcp = require("tcp");
+
+// External libs
+var xml = require("./node-xml");
+var sha1 = require("./sha1");
+
+// This lib
+var xmpp = exports;
+
+// Wraps a function so that its 'this' is always 'context' when called
+var recontext = function (context, f) { return function () { return f.apply(context, arguments); }; };
+
+xmpp.xmlns = {
+	streams: "http://etherx.jabber.org/streams",
+	component_accept: "jabber:component:accept"
+};
+
+xmpp.Status = {
+	ERROR: 0,
+	CONNECTING: 1,
+	CONNFAIL: 2,
+	AUTHENTICATING: 3,
+	AUTHFAIL: 4,
+	CONNECTED: 5,
+	DISCONNECTED: 6,
+	DISCONNECTING: 7,
+};
+
+xmpp.LogLevel = {
+	DEBUG: 0,
+	INFO: 1,
+	WARN: 2,
+	ERROR: 3,
+	FATAL: 4
+};
+/** XMPPStream: Takes a parser, eats bytes, fires callbacks on stream events **/
+xmpp.Stream = function (callbacks)
+{
+	this.callbacks = callbacks;
+	var stream = this;
+	var stanza;
+	this.parser = new xml.SaxParser(function (cb)
+	{
+		cb.onStartElementNS(function (tagname, attr_arr, prefix, uri, namespaces)
+		{
+			var attr = {xmlns:uri};
+			for(var i=0;i<attr_arr.length;i++)
+				attr[attr_arr[i][0]] = attr_arr[i][1];
+			for(var i=0;i<namespaces.length;i++)
+				if(namespaces[i][0].length > 0)
+					attr["xmlns:"+namespaces[i][0]] = namespaces[i][1];
+			if(!stanza)
+			{
+				if(stream.opened)
+					stanza = xmpp.stanza(tagname, attr);
+				else if(tagname == "stream" && uri == xmpp.xmlns.streams)
+				{
+					stream.opened = true;
+					callbacks.opened(attr);
+				}
+				else
+				{
+					callbacks.error("no-stream");
+				}
+			}
+			else
+			{
+				stanza.c(tagname, attr);
+			}
+			
+		});
+		
+		cb.onEndElementNS(function(tagname) {
+			if(stanza)
+				if(stanza.last_node.length == 1)
+				{
+					callbacks.stanza(stanza);
+					stanza = null;
+				}
+				else
+					stanza.up();
+			else
+			{
+				stream.opened = false;
+				callbacks.closed();
+			}
+		});
+		
+		cb.onCharacters(function(chars) {
+			if(stanza)
+				stanza.t(chars);
+		});
+	});
+	
+	this.data = function (data)
+	{
+		return this.parser.parseString(data);
+	}
+	
+	return this;
+};
+
+
+/** Connection: Takes host/port, manages stream **/
+xmpp.Connection = function (host, port)
+{
+	this.host = host || "localhost";
+	this.port = port || 5347;
+	
+	this.socket = tcp.createConnection();
+	
+	this.stream = new xmpp.Stream({
+		opened: recontext(this, this._stream_opened),
+		stanza: recontext(this, this._handle_stanza),
+		closed: recontext(this, this._stream_closed)
+	});
+	
+	return this;
+};
+
+exports.Connection.prototype = {
+	connect: function (jid, pass, callback)
+	{
+		this.jid = jid;
+		this.password = pass;
+		this.connect_callback = callback;
+		
+		var conn = this;
+		this.socket.addListener("connect", recontext(this, conn._socket_connected));
+		this.socket.addListener("disconnect", recontext(this, conn._socket_disconnected));
+		this.socket.addListener("receive", recontext(this, conn._socket_received));
+		
+		// Connect TCP socket
+		this.socket.connect(this.port, this.host);
+	
+		this._setStatus(xmpp.Status.CONNECTING);
+	},
+	
+	send: function (data)
+	{
+		this.debug("SND: "+data);
+		this.socket.send(data.toString());
+	},
+	
+	// Update the status of the connection, call connect_callback
+	_setStatus: function (status, condition)
+	{
+		this.status = status;
+		this.connect_callback(status, condition);
+	},
+	
+	// Socket listeners, called on TCP-level events
+	_socket_connected: function ()
+	{
+		this.info("CONNECTED.");
+		this.send("<stream:stream xmlns='jabber:component:accept' xmlns:stream='http://etherx.jabber.org/streams' to='"+this.jid+"'>");
+	},
+	
+	_socket_disconnected: function (had_error)
+	{
+		if(this.status == xmpp.Status.CONNECTING)
+			this._setStatus(xmpp.Status.CONNFAIL);
+		elseif(this.status == xmpp.Status.CONNECTED)
+			this._setStatus(xmpp.Status.DISCONNECTED);
+		this.info("DISCONNECTED.");
+	},
+	
+	_socket_received: function (data)
+	{
+		this.debug("RCV: "+data);
+		// Push to parser
+		this.stream.data(data);
+	},
+	
+	// Stream listeners, called on XMPP-level events
+	_stream_opened: function (attr)
+	{
+		this.debug("STREAM: opened.");
+		this._setStatus(xmpp.Status.AUTHENTICATING);
+		var handshake = sha1.hex(attr.id + this.password);
+		this.debug("Sending authentication token...");
+		this.send("<handshake>"+handshake+"</handshake>");
+	},
+	
+	_handle_stanza: function (stanza)
+	{
+		if(stanza.attr.xmlns == xmpp.xmlns.component_accept)
+		{
+			if(stanza.name == "handshake")
+			{
+				this._setStatus(xmpp.Status.CONNECTED);
+			}
+		}
+		this.debug("STANZA: "+stanza.toString());
+	},
+	
+	_stream_closed: function ()
+	{
+		this.debug("STREAM: closed.");
+		this.socket.close();
+		if(this.status == xmpp.Status.CONNECTING)
+			this._setStatus(xmpp.status.CONNFAIL);
+		else
+			this._setStatus(xmpp.Status.DISCONNECTED);
+	},
+	
+	_stream_error: function (condition)
+	{
+		this._setStatus(xmpp.Status.ERROR, condition);
+	},
+	
+	// Logging
+	log: function (level, message) {},
+	debug: function (message) { return this.log(xmpp.LogLevel.DEBUG, message); },
+	info:  function (message) { return this.log(xmpp.LogLevel.INFO , message); },
+	warn:  function (message) { return this.log(xmpp.LogLevel.WARN , message); },
+	error: function (message) { return this.log(xmpp.LogLevel.ERROR, message); },
+	fatal: function (message) { return this.log(xmpp.LogLevel.FATAL, message); }
+	
+};
+
+function xmlescape(s)
+{
+	return s.replace(/&/g, "&amp;")
+	        .replace(/</g, "&lt;")
+	        .replace(/>/g, "&gt;")
+	        .replace(/\"/g, "&quot;");
+}
+
+/** StanzaBuilder: Helps create and manipulate XML snippets **/
+xmpp.StanzaBuilder = function (name, attr)
+{
+	this.name = name;
+	this.attr = attr || {};
+	this.tags = [];
+	this.children = [];
+	this.last_node = [this];
+	return this;
+};
+
+xmpp.StanzaBuilder.prototype = {
+	c: function (name, attr)
+	{
+		var s = new xmpp.StanzaBuilder(name, attr);
+		var parent = this.last_node[this.last_node.length-1];
+		parent.tags.push(s);
+		parent.children.push(s);
+		this.last_node.push(s);
+		return this;
+	},
+	
+	t: function (text)
+	{
+		var parent = this.last_node[this.last_node.length-1];
+		parent.children.push(text);
+		return this;
+	},
+	
+	up: function ()
+	{
+		this.last_node.pop();
+		return this;
+	},
+	
+	toString: function (top_tag_only)
+	{
+		var buf = [];
+		buf.push("<" + this.name);
+		for(var attr in this.attr)
+		{
+			buf.push(" " + attr + "='" + xmlescape(this.attr[attr]) + "'");
+		}
+		
+		// Now add children if wanted
+		if(top_tag_only)
+		{
+			buf.push(">");
+		}
+		else if(this.children.length == 0)
+		{
+			buf.push("/>");
+		}
+		else
+		{
+			buf.push(">");
+			for(var i = 0; i<this.children.length; i++)
+			{
+				var child = this.children[i];
+				if(typeof(child) == "string")
+					buf.push(xmlescape(child));
+				else
+					buf.push(child.toString());
+			}
+			buf.push("</" + this.name + ">");
+		}
+		return buf.join("");
+	}
+}
+
+xmpp.stanza = function (name, attr)
+{
+	return new xmpp.StanzaBuilder(name, attr);
+}
+
+xmpp.message = function (attr)
+{
+	return xmpp.stanza("message", attr);
+}
+
+xmpp.presence = function (attr)
+{
+	return xmpp.stanza("presence", attr);
+}
+
+xmpp.iq = function (attr)
+{
+	return xmpp.stanza("iq", attr);
+}