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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var crypto = require('crypto');
var util = require('util');
var net = require('net');
var url = require('url');
var events = require('events');
var Stream = require('stream');
var END_OF_FILE = 42;
var assert = require('assert').ok;
var constants = require('constants');
var DEFAULT_CIPHERS = 'ECDHE-RSA-AES128-SHA256:AES128-GCM-SHA256:' + // TLS 1.2
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'RC4:HIGH:!MD5:!aNULL:!EDH'; // TLS 1.0
// Allow {CLIENT_RENEG_LIMIT} client-initiated session renegotiations
// every {CLIENT_RENEG_WINDOW} seconds. An error event is emitted if more
// renegotations are seen. The settings are applied to all remote client
// connections.
exports.CLIENT_RENEG_LIMIT = 3;
exports.CLIENT_RENEG_WINDOW = 600;
var debug;
if (process.env.NODE_DEBUG && /tls/.test(process.env.NODE_DEBUG)) {
debug = function(a) { console.error('TLS:', a); };
} else {
debug = function() { };
}
var Connection = null;
try {
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Connection = process.binding('crypto').Connection;
} catch (e) {
throw new Error('node.js not compiled with openssl crypto support.');
}
// Convert protocols array into valid OpenSSL protocols list
// ("\x06spdy/2\x08http/1.1\x08http/1.0")
function convertNPNProtocols(NPNProtocols, out) {
// If NPNProtocols is Array - translate it into buffer
if (Array.isArray(NPNProtocols)) {
var buff = new Buffer(NPNProtocols.reduce(function(p, c) {
return p + 1 + Buffer.byteLength(c);
}, 0));
NPNProtocols.reduce(function(offset, c) {
var clen = Buffer.byteLength(c);
buff[offset] = clen;
buff.write(c, offset + 1);
return offset + 1 + clen;
}, 0);
NPNProtocols = buff;
}
// If it's already a Buffer - store it
if (Buffer.isBuffer(NPNProtocols)) {
out.NPNProtocols = NPNProtocols;
}
}
function checkServerIdentity(host, cert) {
// Create regexp to much hostnames
function regexpify(host, wildcards) {
// Add trailing dot (make hostnames uniform)
if (!/\.$/.test(host)) host += '.';
// The same applies to hostname with more than one wildcard,
// if hostname has wildcard when wildcards are not allowed,
// or if there are less than two dots after wildcard (i.e. *.com or *d.com)
if (/\*.*\*/.test(host) || !wildcards && /\*/.test(host) ||
/\*/.test(host) && !/\*.*\..+\..+/.test(host)) {
return /$./;
}
// Replace wildcard chars with regexp's wildcard and
// escape all characters that have special meaning in regexps
// (i.e. '.', '[', '{', '*', and others)
var re = host.replace(
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/\*([a-z0-9\\-_\.])|[\.,\-\\\^\$+?*\[\]\(\):!\|{}]/g,
function(all, sub) {
if (sub) return '[a-z0-9\\-_]*' + (sub === '-' ? '\\-' : sub);
return '\\' + all;
});
return new RegExp('^' + re + '$', 'i');
}
var dnsNames = [],
uriNames = [],
ips = [],
valid = false;
// There're several names to perform check against:
// CN and altnames in certificate extension
// (DNS names, IP addresses, and URIs)
//
// Walk through altnames and generate lists of those names
if (cert.subjectaltname) {
cert.subjectaltname.split(/, /g).forEach(function(altname) {
if (/^DNS:/.test(altname)) {
dnsNames.push(altname.slice(4));
} else if (/^IP Address:/.test(altname)) {
ips.push(altname.slice(11));
} else if (/^URI:/.test(altname)) {
var uri = url.parse(altname.slice(4));
if (uri) uriNames.push(uri.hostname);
}
});
}
// If hostname is an IP address, it should be present in the list of IP
// addresses.
if (net.isIP(host)) {
valid = ips.some(function(ip) {
return ip === host;
});
} else {
// Transform hostname to canonical form
if (!/\.$/.test(host)) host += '.';
// Otherwise check all DNS/URI records from certificate
// (with allowed wildcards)
dnsNames = dnsNames.map(function(name) {
return regexpify(name, true);
});
// Wildcards ain't allowed in URI names
uriNames = uriNames.map(function(name) {
return regexpify(name, false);
});
dnsNames = dnsNames.concat(uriNames);
// And only after check if hostname matches CN
// (because CN is deprecated, but should be used for compatiblity anyway)
var commonNames = cert.subject.CN;
if (Array.isArray(commonNames)) {
for (var i = 0, k = commonNames.length; i < k; ++i) {
dnsNames.push(regexpify(commonNames[i], false));
}
} else {
dnsNames.push(regexpify(commonNames, false));
}
valid = dnsNames.some(function(re) {
return re.test(host);
});
}
return valid;
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}
exports.checkServerIdentity = checkServerIdentity;
function SlabBuffer() {
this.create();
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}
SlabBuffer.prototype.create = function create() {
this.isFull = false;
this.pool = new Buffer(10 * 1024 * 1024);
this.offset = 0;
this.remaining = this.pool.length;
};
SlabBuffer.prototype.use = function use(context, fn) {
if (this.remaining === 0) {
this.isFull = true;
return 0;
}
var bytes = fn.call(context, this.pool, this.offset, this.remaining);
if (bytes > 0) {
this.offset += bytes;
this.remaining -= bytes;
}
assert(this.remaining >= 0);
return bytes;
};
var slabBuffer = new SlabBuffer();
// Base class of both CleartextStream and EncryptedStream
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function CryptoStream(pair) {
Stream.call(this);
this.pair = pair;
this.readable = this.writable = true;
this._paused = false;
this._needDrain = false;
this._pending = [];
this._pendingCallbacks = [];
this._pendingBytes = 0;
this._buffer = slabBuffer;
}
util.inherits(CryptoStream, Stream);
CryptoStream.prototype.write = function(data /* , encoding, cb */) {
if (this == this.pair.cleartext) {
debug('cleartext.write called with ' + data.length + ' bytes');
} else {
debug('encrypted.write called with ' + data.length + ' bytes');
}
if (!this.writable) {
throw new Error('CryptoStream is not writable');
}
var encoding, cb;
// parse arguments
if (typeof arguments[1] == 'string') {
encoding = arguments[1];
cb = arguments[2];
} else {
cb = arguments[1];
}
// Transform strings into buffers.
if (typeof data == 'string') {
data = new Buffer(data, encoding);
}
debug((this === this.pair.cleartext ? 'clear' : 'encrypted') + 'In data');
this._pending.push(data);
this._pendingCallbacks.push(cb);
this._pendingBytes += data.length;
this.pair._writeCalled = true;
this.pair.cycle();
// In the following cases, write() should return a false,
// then this stream should eventually emit 'drain' event.
//
// 1. There are pending data more than 128k bytes.
// 2. A forward stream shown below is paused.
// A) EncryptedStream for CleartextStream.write().
// B) CleartextStream for EncryptedStream.write().
//
if (!this._needDrain) {
if (this._pendingBytes >= 128 * 1024) {
this._needDrain = true;
} else {
if (this === this.pair.cleartext) {
this._needDrain = this.pair.encrypted._paused;
} else {
this._needDrain = this.pair.cleartext._paused;
}
}
}
return !this._needDrain;
};
CryptoStream.prototype.pause = function() {
debug('paused ' + (this == this.pair.cleartext ? 'cleartext' : 'encrypted'));
this._paused = true;
};
CryptoStream.prototype.resume = function() {
debug('resume ' + (this == this.pair.cleartext ? 'cleartext' : 'encrypted'));
this._paused = false;
this.pair.cycle();
};
CryptoStream.prototype.setTimeout = function(timeout, callback) {
if (this.socket) this.socket.setTimeout(timeout, callback);
};
CryptoStream.prototype.setNoDelay = function(noDelay) {
if (this.socket) this.socket.setNoDelay(noDelay);
};
CryptoStream.prototype.setKeepAlive = function(enable, initialDelay) {
if (this.socket) this.socket.setKeepAlive(enable, initialDelay);
};
CryptoStream.prototype.setEncoding = function(encoding) {
var StringDecoder = require('string_decoder').StringDecoder; // lazy load
this._decoder = new StringDecoder(encoding);
};
// Example:
// C=US\nST=CA\nL=SF\nO=Joyent\nOU=Node.js\nCN=ca1\nemailAddress=ry@clouds.org
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function parseCertString(s) {
var out = {};
var parts = s.split('\n');
for (var i = 0, len = parts.length; i < len; i++) {
var sepIndex = parts[i].indexOf('=');
if (sepIndex > 0) {
var key = parts[i].slice(0, sepIndex);
var value = parts[i].slice(sepIndex + 1);
if (key in out) {
if (!Array.isArray(out[key])) {
out[key] = [out[key]];
}
out[key].push(value);
} else {
out[key] = value;
}
}
}
return out;
}
CryptoStream.prototype.getPeerCertificate = function() {
if (this.pair.ssl) {
var c = this.pair.ssl.getPeerCertificate();
if (c) {
if (c.issuer) c.issuer = parseCertString(c.issuer);
if (c.subject) c.subject = parseCertString(c.subject);
return c;
}
}
return null;
};
CryptoStream.prototype.getSession = function() {
if (this.pair.ssl) {
return this.pair.ssl.getSession();
}
return null;
};
CryptoStream.prototype.isSessionReused = function() {
if (this.pair.ssl) {
return this.pair.ssl.isSessionReused();
}
return null;
};
CryptoStream.prototype.getCipher = function(err) {
if (this.pair.ssl) {
return this.pair.ssl.getCurrentCipher();
} else {
return null;
}
};
CryptoStream.prototype.end = function(d) {
if (this.pair._doneFlag) return;
if (!this.writable) return;
if (d) {
this.write(d);
}
this._pending.push(END_OF_FILE);
this._pendingCallbacks.push(null);
// If this is an encrypted stream then we need to disable further 'data'
// events.
this.writable = false;
this.pair.cycle();
};
CryptoStream.prototype.destroySoon = function(err) {
if (this.writable) {
this.end();
} else {
this.destroy();
}
};
CryptoStream.prototype.destroy = function(err) {
if (this.pair._doneFlag) return;
this.pair.destroy();
};
CryptoStream.prototype._done = function() {
this._doneFlag = true;
if (this.pair.cleartext._doneFlag &&
this.pair.encrypted._doneFlag &&
!this.pair._doneFlag) {
// If both streams are done:
if (!this.pair._secureEstablished) {
this.pair.error();
} else {
this.pair.destroy();
}
}
};
// readyState is deprecated. Don't use it.
Object.defineProperty(CryptoStream.prototype, 'readyState', {
get: function() {
if (this._connecting) {
return 'opening';
} else if (this.readable && this.writable) {
return 'open';
} else if (this.readable && !this.writable) {
return 'readOnly';
} else if (!this.readable && this.writable) {
return 'writeOnly';
} else {
return 'closed';
}
}
});
// Move decrypted, clear data out into the application.
// From the user's perspective this occurs as a 'data' event
// on the pair.cleartext.
// also
// Move encrypted data to the stream. From the user's perspective this
// occurs as a 'data' event on the pair.encrypted. Usually the application
// will have some code which pipes the stream to a socket:
//
// pair.encrypted.on('data', function (d) {
// socket.write(d);
// });
//
CryptoStream.prototype._push = function() {
if (this == this.pair.encrypted && !this.writable) {
// If the encrypted side got EOF, we do not attempt
// to write out data anymore.
return;
}
while (!this._paused) {
var chunkBytes = 0,
bytesRead = 0,
start = this._buffer.offset;
do {
chunkBytes = this._buffer.use(this, this._pusher);
if (chunkBytes > 0) bytesRead += chunkBytes;
if (this.pair.ssl && this.pair.ssl.error) {
this.pair.error();
return;
}
this.pair.maybeInitFinished();
} while (chunkBytes > 0 && !this._buffer.isFull);
var pool = this._buffer.pool;
// Create new buffer if previous was filled up
if (this._buffer.isFull) this._buffer.create();
assert(bytesRead >= 0);
// Bail out if we didn't read any data.
if (bytesRead == 0) {
if (this._internallyPendingBytes() == 0 && this._destroyAfterPush) {
this._done();
}
return;
}
var chunk = pool.slice(start, start + bytesRead);
if (this === this.pair.cleartext) {
debug('cleartext emit "data" with ' + bytesRead + ' bytes');
} else {
debug('encrypted emit "data" with ' + bytesRead + ' bytes');
}
if (this._decoder) {
var string = this._decoder.write(chunk);
if (string.length) this.emit('data', string);
} else {
this.emit('data', chunk);
}
// Optimization: emit the original buffer with end points
if (this.ondata) this.ondata(pool, start, start + bytesRead);
}
};
// Push in any clear data coming from the application.
// This arrives via some code like this:
//
// pair.cleartext.write("hello world");
//
// also
//
// Push in incoming encrypted data from the socket.
// This arrives via some code like this:
//
// socket.on('data', function (d) {
// pair.encrypted.write(d)
// });
//
CryptoStream.prototype._pull = function() {
var havePending = this._pending.length > 0;
assert(havePending || this._pendingBytes == 0);
while (this._pending.length > 0) {
if (!this.pair.ssl) break;
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var tmp = this._pending.shift();
var cb = this._pendingCallbacks.shift();
assert(this._pending.length === this._pendingCallbacks.length);
if (tmp === END_OF_FILE) {
// Sending EOF
if (this === this.pair.encrypted) {
debug('end encrypted ' + this.pair.fd);
this.pair.cleartext._destroyAfterPush = true;
} else {
// CleartextStream
assert(this === this.pair.cleartext);
debug('end cleartext');
this.pair.ssl.shutdown();
// TODO check if we get EAGAIN From shutdown, would have to do it
// again. should unshift END_OF_FILE back onto pending and wait for
// next cycle.
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this.pair.encrypted._destroyAfterPush = true;
}
this.pair.cycle();
this._done();
return;
}
if (tmp.length == 0) continue;
var rv = this._puller(tmp);
if (this.pair.ssl && this.pair.ssl.error) {
this.pair.error();
return;
}
this.pair.maybeInitFinished();
if (rv === 0 || rv < 0) {
this._pending.unshift(tmp);
this._pendingCallbacks.unshift(cb);
break;
}
this._pendingBytes -= tmp.length;
assert(this._pendingBytes >= 0);
if (cb) cb();
assert(rv === tmp.length);
}
// If pending data has cleared, 'drain' event should be emitted
// after write() returns a false.
// Except when a forward stream shown below is paused.
// A) EncryptedStream for CleartextStream._pull().
// B) CleartextStream for EncryptedStream._pull().
//
if (this._needDrain && this._pending.length === 0) {
var paused;
if (this === this.pair.cleartext) {
paused = this.pair.encrypted._paused;
} else {
paused = this.pair.cleartext._paused;
}
if (!paused) {
debug('drain ' + (this === this.pair.cleartext ? 'clear' : 'encrypted'));
var self = this;
process.nextTick(function() {
self.emit('drain');
});
this._needDrain = false;
if (this.__destroyOnDrain) this.end();
}
}
};
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function CleartextStream(pair) {
CryptoStream.call(this, pair);
}
util.inherits(CleartextStream, CryptoStream);
CleartextStream.prototype._internallyPendingBytes = function() {
if (this.pair.ssl) {
return this.pair.ssl.clearPending();
} else {
return 0;
}
};
CleartextStream.prototype._puller = function(b) {
debug('clearIn ' + b.length + ' bytes');
return this.pair.ssl.clearIn(b, 0, b.length);
};
CleartextStream.prototype._pusher = function(pool, offset, length) {
debug('reading from clearOut');
if (!this.pair.ssl) return -1;
return this.pair.ssl.clearOut(pool, offset, length);
};
CleartextStream.prototype.address = function() {
return this.socket && this.socket.address();
};
CleartextStream.prototype.__defineGetter__('remoteAddress', function() {
return this.socket && this.socket.remoteAddress;
});
CleartextStream.prototype.__defineGetter__('remotePort', function() {
return this.socket && this.socket.remotePort;
});
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function EncryptedStream(pair) {
CryptoStream.call(this, pair);
}
util.inherits(EncryptedStream, CryptoStream);
EncryptedStream.prototype._internallyPendingBytes = function() {
if (this.pair.ssl) {
return this.pair.ssl.encPending();
} else {
return 0;
}
};
EncryptedStream.prototype._puller = function(b) {
debug('writing from encIn');
return this.pair.ssl.encIn(b, 0, b.length);
};
EncryptedStream.prototype._pusher = function(pool, offset, length) {
debug('reading from encOut');
if (!this.pair.ssl) return -1;
return this.pair.ssl.encOut(pool, offset, length);
};
function onhandshakestart() {
debug('onhandshakestart');
var self = this;
var ssl = self.ssl;
var now = Date.now();
assert(now >= ssl.lastHandshakeTime);
if ((now - ssl.lastHandshakeTime) >= exports.CLIENT_RENEG_WINDOW * 1000) {
ssl.handshakes = 0;
}
var first = (ssl.lastHandshakeTime === 0);
ssl.lastHandshakeTime = now;
if (first) return;
if (++ssl.handshakes > exports.CLIENT_RENEG_LIMIT) {
// Defer the error event to the next tick. We're being called from OpenSSL's
// state machine and OpenSSL is not re-entrant. We cannot allow the user's
// callback to destroy the connection right now, it would crash and burn.
setImmediate(function() {
var err = new Error('TLS session renegotiation attack detected.');
if (self.cleartext) self.cleartext.emit('error', err);
});
}
}
function onhandshakedone() {
// for future use
debug('onhandshakedone');
}
function onclienthello(hello) {
var self = this,
once = false;
this.encrypted.pause();
this.cleartext.pause();
function callback(err, session) {
if (once) return;
once = true;
if (err) return self.socket.destroy(err);
self.ssl.loadSession(session);
self.encrypted.resume();
self.cleartext.resume();
}
if (hello.sessionId.length <= 0 ||
!this.server ||
!this.server.emit('resumeSession', hello.sessionId, callback)) {
callback(null, null);
}
}
function onnewsession(key, session) {
if (!this.server) return;
this.server.emit('newSession', key, session);
}
/**
* Provides a pair of streams to do encrypted communication.
*/
function SecurePair(credentials, isServer, requestCert, rejectUnauthorized,
options) {
if (!(this instanceof SecurePair)) {
return new SecurePair(credentials,
isServer,
requestCert,
rejectUnauthorized,
options);
}
var self = this;
options || (options = {});
events.EventEmitter.call(this);
this.server = options.server;
this._secureEstablished = false;
this._isServer = isServer ? true : false;
this._encWriteState = true;
this._clearWriteState = true;
this._doneFlag = false;
if (!credentials) {
this.credentials = crypto.createCredentials();
} else {
this.credentials = credentials;
}
if (!this._isServer) {
// For clients, we will always have either a given ca list or be using
// default one
requestCert = true;
}
this._rejectUnauthorized = rejectUnauthorized ? true : false;
this._requestCert = requestCert ? true : false;
this.ssl = new Connection(this.credentials.context,
this._isServer ? true : false,
this._isServer ? this._requestCert :
options.servername,
this._rejectUnauthorized);
if (this._isServer) {
this.ssl.onhandshakestart = onhandshakestart.bind(this);
this.ssl.onhandshakedone = onhandshakedone.bind(this);
this.ssl.onclienthello = onclienthello.bind(this);
this.ssl.onnewsession = onnewsession.bind(this);
this.ssl.lastHandshakeTime = 0;
this.ssl.handshakes = 0;
}
if (process.features.tls_sni) {
if (this._isServer && options.SNICallback) {
this.ssl.setSNICallback(options.SNICallback);
}
this.servername = null;
}
if (process.features.tls_npn && options.NPNProtocols) {
this.ssl.setNPNProtocols(options.NPNProtocols);
this.npnProtocol = null;
}
/* Acts as a r/w stream to the cleartext side of the stream. */
this.cleartext = new CleartextStream(this);
/* Acts as a r/w stream to the encrypted side of the stream. */
this.encrypted = new EncryptedStream(this);
process.nextTick(function() {
/* The Connection may be destroyed by an abort call */
if (self.ssl) {
self.ssl.start();
}
self.cycle();
});
}
util.inherits(SecurePair, events.EventEmitter);
exports.createSecurePair = function(credentials,
isServer,
requestCert,
rejectUnauthorized) {
var pair = new SecurePair(credentials,
isServer,
requestCert,
rejectUnauthorized);
return pair;
};
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/* Attempt to cycle OpenSSLs buffers in various directions.
*
* An SSL Connection can be viewed as four separate piplines,
* interacting with one has no connection to the behavoir of
* any of the other 3 -- This might not sound reasonable,
* but consider things like mid-stream renegotiation of
* the ciphers.
*
* The four pipelines, using terminology of the client (server is just
* reversed):
* (1) Encrypted Output stream (Writing encrypted data to peer)
* (2) Encrypted Input stream (Reading encrypted data from peer)
* (3) Cleartext Output stream (Decrypted content from the peer)
* (4) Cleartext Input stream (Cleartext content to send to the peer)
*
* This function attempts to pull any available data out of the Cleartext
* input stream (4), and the Encrypted input stream (2). Then it pushes any
* data available from the cleartext output stream (3), and finally from the
* Encrypted output stream (1)
*
* It is called whenever we do something with OpenSSL -- post reciving
* content, trying to flush, trying to change ciphers, or shutting down the
* connection.
*
* Because it is also called everywhere, we also check if the connection has
* completed negotiation and emit 'secure' from here if it has.
*/
SecurePair.prototype.cycle = function(depth) {
if (this._doneFlag) return;
depth = depth ? depth : 0;
if (depth == 0) this._writeCalled = false;
var established = this._secureEstablished;
if (!this.cycleEncryptedPullLock) {
this.cycleEncryptedPullLock = true;
debug('encrypted._pull');
this.encrypted._pull();
this.cycleEncryptedPullLock = false;
}
if (!this.cycleCleartextPullLock) {
this.cycleCleartextPullLock = true;
debug('cleartext._pull');
this.cleartext._pull();
this.cycleCleartextPullLock = false;
}
if (!this.cycleCleartextPushLock) {
this.cycleCleartextPushLock = true;
debug('cleartext._push');
this.cleartext._push();
this.cycleCleartextPushLock = false;
}
if (!this.cycleEncryptedPushLock) {
this.cycleEncryptedPushLock = true;
debug('encrypted._push');
this.encrypted._push();
this.cycleEncryptedPushLock = false;
}
if ((!established && this._secureEstablished) ||
(depth == 0 && this._writeCalled)) {
// If we were not established but now we are, let's cycle again.
// Or if there is some data to write...
this.cycle(depth + 1);
}
};
SecurePair.prototype.maybeInitFinished = function() {
if (this.ssl && !this._secureEstablished && this.ssl.isInitFinished()) {
if (process.features.tls_npn) {
this.npnProtocol = this.ssl.getNegotiatedProtocol();
}
if (process.features.tls_sni) {
this.servername = this.ssl.getServername();
}
this._secureEstablished = true;
debug('secure established');
this.emit('secure');
}
};
SecurePair.prototype.destroy = function() {
var self = this;
if (!this._doneFlag) {
this._doneFlag = true;
this.ssl.error = null;
this.ssl.close();
this.ssl = null;
self.encrypted.writable = self.encrypted.readable = false;
self.cleartext.writable = self.cleartext.readable = false;
process.nextTick(function() {
if (self.cleartext._decoder) {
var ret = self.cleartext._decoder.end();
if (ret)
self.cleartext.emit('data', ret);
}
self.cleartext.emit('end');
self.encrypted.emit('close');
self.cleartext.emit('close');
});
}
};
SecurePair.prototype.error = function() {
if (!this._secureEstablished) {
var error = this.ssl.error;
if (!error) {
error = new Error('socket hang up');
error.code = 'ECONNRESET';
}
this.destroy();
this.emit('error', error);
} else {
var err = this.ssl.error;
this.ssl.error = null;
if (this._isServer &&
this._rejectUnauthorized &&
/peer did not return a certificate/.test(err.message)) {
// Not really an error.
this.destroy();
} else {
this.cleartext.emit('error', err);
}
}
};
// TODO: support anonymous (nocert) and PSK
// AUTHENTICATION MODES
//
// There are several levels of authentication that TLS/SSL supports.
// Read more about this in "man SSL_set_verify".
//
// 1. The server sends a certificate to the client but does not request a
// cert from the client. This is common for most HTTPS servers. The browser
// can verify the identity of the server, but the server does not know who
// the client is. Authenticating the client is usually done over HTTP using
// login boxes and cookies and stuff.
//
// 2. The server sends a cert to the client and requests that the client
// also send it a cert. The client knows who the server is and the server is
// requesting the client also identify themselves. There are several
// outcomes:
//
// A) verifyError returns null meaning the client's certificate is signed
// by one of the server's CAs. The server know's the client idenity now
// and the client is authorized.
//
// B) For some reason the client's certificate is not acceptable -
// verifyError returns a string indicating the problem. The server can
// either (i) reject the client or (ii) allow the client to connect as an
// unauthorized connection.
//
// The mode is controlled by two boolean variables.
//
// requestCert
// If true the server requests a certificate from client connections. For
// the common HTTPS case, users will want this to be false, which is what
// it defaults to.
//
// rejectUnauthorized
// If true clients whose certificates are invalid for any reason will not
// be allowed to make connections. If false, they will simply be marked as
// unauthorized but secure communication will continue. By default this is
// true.
//
//
//
// Options:
// - requestCert. Send verify request. Default to false.
// - rejectUnauthorized. Boolean, default to true.
// - key. string.
// - cert: string.
// - ca: string or array of strings.
//
// emit 'secureConnection'
// function (cleartextStream, encryptedStream) { }
//
// 'cleartextStream' has the boolean property 'authorized' to determine if
// it was verified by the CA. If 'authorized' is false, a property
// 'authorizationError' is set on cleartextStream and has the possible
// values:
//
// "UNABLE_TO_GET_ISSUER_CERT", "UNABLE_TO_GET_CRL",
// "UNABLE_TO_DECRYPT_CERT_SIGNATURE", "UNABLE_TO_DECRYPT_CRL_SIGNATURE",
// "UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY", "CERT_SIGNATURE_FAILURE",
// "CRL_SIGNATURE_FAILURE", "CERT_NOT_YET_VALID" "CERT_HAS_EXPIRED",
// "CRL_NOT_YET_VALID", "CRL_HAS_EXPIRED" "ERROR_IN_CERT_NOT_BEFORE_FIELD",
// "ERROR_IN_CERT_NOT_AFTER_FIELD", "ERROR_IN_CRL_LAST_UPDATE_FIELD",
// "ERROR_IN_CRL_NEXT_UPDATE_FIELD", "OUT_OF_MEM",
// "DEPTH_ZERO_SELF_SIGNED_CERT", "SELF_SIGNED_CERT_IN_CHAIN",
// "UNABLE_TO_GET_ISSUER_CERT_LOCALLY", "UNABLE_TO_VERIFY_LEAF_SIGNATURE",
// "CERT_CHAIN_TOO_LONG", "CERT_REVOKED" "INVALID_CA",
// "PATH_LENGTH_EXCEEDED", "INVALID_PURPOSE" "CERT_UNTRUSTED",
// "CERT_REJECTED"
//
//
// TODO:
// cleartext.credentials (by mirroring from pair object)
// cleartext.getCertificate() (by mirroring from pair.credentials.context)
14 years ago
function Server(/* [options], listener */) {
var options, listener;
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if (typeof arguments[0] == 'object') {
options = arguments[0];
listener = arguments[1];
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} else if (typeof arguments[0] == 'function') {
options = {};
listener = arguments[0];
}
if (!(this instanceof Server)) return new Server(options, listener);
this._contexts = [];
var self = this;
// Handle option defaults:
this.setOptions(options);
if (!self.pfx && (!self.cert || !self.key)) {
throw new Error('Missing PFX or certificate + private key.');
}
var sharedCreds = crypto.createCredentials({
13 years ago
pfx: self.pfx,
key: self.key,
passphrase: self.passphrase,
cert: self.cert,
ca: self.ca,
ciphers: self.ciphers || DEFAULT_CIPHERS,
secureProtocol: self.secureProtocol,
secureOptions: self.secureOptions,
crl: self.crl,
sessionIdContext: self.sessionIdContext
});
var timeout = options.handshakeTimeout || (120 * 1000);
if (typeof timeout !== 'number') {
throw new TypeError('handshakeTimeout must be a number');
}
// constructor call
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net.Server.call(this, function(socket) {
var creds = crypto.createCredentials(null, sharedCreds.context);
var pair = new SecurePair(creds,
true,
self.requestCert,
self.rejectUnauthorized,
{
server: self,
NPNProtocols: self.NPNProtocols,
SNICallback: self.SNICallback
});
var cleartext = pipe(pair, socket);
cleartext._controlReleased = false;
function listener() {
pair.emit('error', new Error('TLS handshake timeout'));
}
if (timeout > 0) {
socket.setTimeout(timeout, listener);
}
pair.once('secure', function() {
socket.setTimeout(0, listener);
pair.cleartext.authorized = false;
pair.cleartext.npnProtocol = pair.npnProtocol;
pair.cleartext.servername = pair.servername;
if (!self.requestCert) {
cleartext._controlReleased = true;
self.emit('secureConnection', pair.cleartext, pair.encrypted);
} else {
var verifyError = pair.ssl.verifyError();
if (verifyError) {
pair.cleartext.authorizationError = verifyError.message;
if (self.rejectUnauthorized) {
socket.destroy();
pair.destroy();
} else {
cleartext._controlReleased = true;
self.emit('secureConnection', pair.cleartext, pair.encrypted);
}
} else {
pair.cleartext.authorized = true;
cleartext._controlReleased = true;
self.emit('secureConnection', pair.cleartext, pair.encrypted);
}
}
});
pair.on('error', function(err) {
self.emit('clientError', err, this);
});
});
if (listener) {
this.on('secureConnection', listener);
}
}
util.inherits(Server, net.Server);
exports.Server = Server;
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exports.createServer = function(options, listener) {
return new Server(options, listener);
};
14 years ago
Server.prototype.setOptions = function(options) {
if (typeof options.requestCert == 'boolean') {
this.requestCert = options.requestCert;
} else {
this.requestCert = false;
}
if (typeof options.rejectUnauthorized == 'boolean') {
this.rejectUnauthorized = options.rejectUnauthorized;
} else {
this.rejectUnauthorized = false;
}
if (options.pfx) this.pfx = options.pfx;
if (options.key) this.key = options.key;
if (options.passphrase) this.passphrase = options.passphrase;
if (options.cert) this.cert = options.cert;
if (options.ca) this.ca = options.ca;
if (options.secureProtocol) this.secureProtocol = options.secureProtocol;
if (options.crl) this.crl = options.crl;
if (options.ciphers) this.ciphers = options.ciphers;
var secureOptions = options.secureOptions || 0;
13 years ago
if (options.honorCipherOrder) {
secureOptions |= constants.SSL_OP_CIPHER_SERVER_PREFERENCE;
}
if (secureOptions) this.secureOptions = secureOptions;
if (options.NPNProtocols) convertNPNProtocols(options.NPNProtocols, this);
if (options.SNICallback) {
this.SNICallback = options.SNICallback;
} else {
this.SNICallback = this.SNICallback.bind(this);
}
if (options.sessionIdContext) {
this.sessionIdContext = options.sessionIdContext;
} else if (this.requestCert) {
this.sessionIdContext = crypto.createHash('md5')
.update(process.argv.join(' '))
.digest('hex');
}
};
// SNI Contexts High-Level API
Server.prototype.addContext = function(servername, credentials) {
if (!servername) {
throw 'Servername is required parameter for Server.addContext';
}
var re = new RegExp('^' +
servername.replace(/([\.^$+?\-\\[\]{}])/g, '\\$1')
.replace(/\*/g, '.*') +
'$');
this._contexts.push([re, crypto.createCredentials(credentials).context]);
};
Server.prototype.SNICallback = function(servername) {
var ctx;
this._contexts.some(function(elem) {
if (servername.match(elem[0]) !== null) {
ctx = elem[1];
return true;
}
});
return ctx;
};
// Target API:
//
// var s = tls.connect({port: 8000, host: "google.com"}, function() {
// if (!s.authorized) {
// s.destroy();
// return;
// }
//
// // s.socket;
//
// s.end("hello world\n");
// });
//
14 years ago
//
function normalizeConnectArgs(listArgs) {
var args = net._normalizeConnectArgs(listArgs);
var options = args[0];
var cb = args[1];
if (typeof listArgs[1] === 'object') {
options = util._extend(options, listArgs[1]);
} else if (typeof listArgs[2] === 'object') {
options = util._extend(options, listArgs[2]);
}
return (cb) ? [options, cb] : [options];
}
exports.connect = function(/* [port, host], options, cb */) {
var args = normalizeConnectArgs(arguments);
var options = args[0];
var cb = args[1];
var defaults = {
rejectUnauthorized: '0' !== process.env.NODE_TLS_REJECT_UNAUTHORIZED
};
options = util._extend(defaults, options || {});
var socket = options.socket ? options.socket : new net.Stream();
var sslcontext = crypto.createCredentials(options);
convertNPNProtocols(options.NPNProtocols, this);
var hostname = options.servername || options.host || 'localhost',
pair = new SecurePair(sslcontext, false, true,
options.rejectUnauthorized === true ? true : false,
{
NPNProtocols: this.NPNProtocols,
servername: hostname
});
if (options.session) {
var session = options.session;
if (typeof session === 'string')
session = new Buffer(session, 'binary');
pair.ssl.setSession(session);
}
var cleartext = pipe(pair, socket);
if (cb) {
cleartext.once('secureConnect', cb);
}
if (!options.socket) {
var connect_opt = (options.path && !options.port) ? {path: options.path} : {
port: options.port,
host: options.host,
localAddress: options.localAddress
};
socket.connect(connect_opt);
}
pair.on('secure', function() {
var verifyError = pair.ssl.verifyError();
cleartext.npnProtocol = pair.npnProtocol;
// Verify that server's identity matches it's certificate's names
if (!verifyError) {
var validCert = checkServerIdentity(hostname,
pair.cleartext.getPeerCertificate());
if (!validCert) {
verifyError = new Error('Hostname/IP doesn\'t match certificate\'s ' +
'altnames');
}
}
if (verifyError) {
cleartext.authorized = false;
cleartext.authorizationError = verifyError.message;
if (pair._rejectUnauthorized) {
cleartext.emit('error', verifyError);
pair.destroy();
} else {
cleartext.emit('secureConnect');
}
} else {
cleartext.authorized = true;
cleartext.emit('secureConnect');
}
});
pair.on('error', function(err) {
cleartext.emit('error', err);
});
cleartext._controlReleased = true;
return cleartext;
};
function pipe(pair, socket) {
pair.encrypted.pipe(socket);
socket.pipe(pair.encrypted);
pair.fd = socket.fd;
var cleartext = pair.cleartext;
cleartext.socket = socket;
cleartext.encrypted = pair.encrypted;
cleartext.authorized = false;
function onerror(e) {
if (cleartext._controlReleased) {
cleartext.emit('error', e);
}
}
function onclose() {
socket.removeListener('error', onerror);
socket.removeListener('timeout', ontimeout);
}
function ontimeout() {
cleartext.emit('timeout');
}
socket.on('error', onerror);
socket.on('close', onclose);
socket.on('timeout', ontimeout);
return cleartext;
}