5 // Martin Baulig <martin.baulig@xamarin.com>
7 // Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
9 // Permission is hereby granted, free of charge, to any person obtaining a copy
10 // of this software and associated documentation files (the "Software"), to deal
11 // in the Software without restriction, including without limitation the rights
12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 // copies of the Software, and to permit persons to whom the Software is
14 // furnished to do so, subject to the following conditions:
16 // The above copyright notice and this permission notice shall be included in
17 // all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #if SECURITY_DEP && MONO_FEATURE_BTLS
27 #if MONO_SECURITY_ALIAS
28 extern alias MonoSecurity;
33 using System.Threading;
34 using System.Threading.Tasks;
35 using System.Security.Cryptography.X509Certificates;
36 using System.Security.Authentication;
37 using System.Runtime.InteropServices;
39 #if MONO_SECURITY_ALIAS
40 using MonoSecurity::Mono.Security.Interface;
42 using Mono.Security.Interface;
45 using MNS = Mono.Net.Security;
49 class MonoBtlsContext : MNS.MobileTlsContext, IMonoBtlsBioMono
51 X509Certificate remoteCertificate;
52 X509Certificate clientCertificate;
53 X509CertificateImplBtls nativeServerCertificate;
54 X509CertificateImplBtls nativeClientCertificate;
60 MonoTlsConnectionInfo connectionInfo;
61 bool certificateValidated;
65 public MonoBtlsContext (
66 MNS.MobileAuthenticatedStream parent,
67 bool serverMode, string targetHost,
68 SslProtocols enabledProtocols, X509Certificate serverCertificate,
69 X509CertificateCollection clientCertificates, bool askForClientCert)
70 : base (parent, serverMode, targetHost, enabledProtocols,
71 serverCertificate, clientCertificates, askForClientCert)
74 nativeServerCertificate = GetPrivateCertificate (serverCertificate);
77 static X509CertificateImplBtls GetPrivateCertificate (X509Certificate certificate)
79 var impl = certificate.Impl as X509CertificateImplBtls;
81 return (X509CertificateImplBtls)impl.Clone ();
83 var password = Guid.NewGuid ().ToString ();
84 var buffer = certificate.Export (X509ContentType.Pfx, password);
86 impl = new X509CertificateImplBtls ();
87 impl.Import (buffer, password, X509KeyStorageFlags.DefaultKeySet);
91 new public MonoBtlsProvider Provider {
92 get { return (MonoBtlsProvider)base.Provider; }
95 int VerifyCallback (MonoBtlsX509StoreCtx storeCtx)
97 using (var chainImpl = new X509ChainImplBtls (storeCtx))
98 using (var managedChain = new X509Chain (chainImpl)) {
99 var leaf = managedChain.ChainElements[0].Certificate;
100 var result = ValidateCertificate (leaf, managedChain);
101 certificateValidated = true;
102 return result ? 1 : 0;
106 int SelectCallback ()
108 Debug ("SELECT CALLBACK!");
110 GetPeerCertificate ();
111 if (remoteCertificate == null)
112 throw new TlsException (AlertDescription.InternalError, "Cannot request client certificate before receiving one from the server.");
114 var clientCert = SelectClientCertificate (remoteCertificate, null);
115 Debug ("SELECT CALLBACK #1: {0}", clientCert);
116 if (clientCert == null)
119 nativeClientCertificate = GetPrivateCertificate (clientCert);
120 Debug ("SELECT CALLBACK #2: {0}", nativeClientCertificate);
121 clientCertificate = new X509Certificate (nativeClientCertificate);
122 SetPrivateCertificate (nativeClientCertificate);
126 public override void StartHandshake ()
128 InitializeConnection ();
130 ssl = new MonoBtlsSsl (ctx);
132 bio = new MonoBtlsBioMono (this);
136 SetPrivateCertificate (nativeServerCertificate);
138 ssl.SetServerName (ServerName);
142 void SetPrivateCertificate (X509CertificateImplBtls privateCert)
144 Debug ("SetPrivateCertificate: {0}", privateCert);
145 ssl.SetCertificate (privateCert.X509);
146 ssl.SetPrivateKey (privateCert.NativePrivateKey);
147 var intermediate = privateCert.IntermediateCertificates;
148 if (intermediate == null)
150 for (int i = 0; i < intermediate.Count; i++) {
151 var impl = (X509CertificateImplBtls)intermediate [i];
152 Debug ("SetPrivateCertificate - add intermediate: {0}", impl);
153 ssl.AddIntermediateCertificate (impl.X509);
157 static Exception GetException (MonoBtlsSslError status)
159 var error = MonoBtlsError.GetError ();
160 var text = MonoBtlsError.GetErrorString (error);
161 return new MonoBtlsException ("{0} {1}", status, text);
164 public override bool ProcessHandshake ()
168 Debug ("ProcessHandshake");
169 MonoBtlsError.ClearError ();
170 var status = DoProcessHandshake ();
171 Debug ("ProcessHandshake #1: {0}", status);
174 case MonoBtlsSslError.None:
180 case MonoBtlsSslError.WantRead:
181 case MonoBtlsSslError.WantWrite:
184 throw GetException (status);
193 MonoBtlsSslError DoProcessHandshake ()
196 return ssl.Handshake ();
198 return ssl.Accept ();
200 return ssl.Connect ();
203 public override void FinishHandshake ()
205 InitializeSession ();
207 isAuthenticated = true;
210 void SetupCertificateStore ()
212 MonoBtlsProvider.SetupCertificateStore (ctx.CertificateStore);
214 if (Settings != null && Settings.TrustAnchors != null) {
215 var trust = IsServer ? MonoBtlsX509TrustKind.TRUST_CLIENT : MonoBtlsX509TrustKind.TRUST_SERVER;
216 ctx.CertificateStore.AddCollection (Settings.TrustAnchors, trust);
220 void InitializeConnection ()
222 ctx = new MonoBtlsSslCtx ();
225 errbio = MonoBtlsBio.CreateMonoStream (Console.OpenStandardError ());
226 ctx.SetDebugBio (errbio);
229 SetupCertificateStore ();
231 if (!IsServer || AskForClientCertificate)
232 ctx.SetVerifyCallback (VerifyCallback, false);
234 ctx.SetSelectCallback (SelectCallback);
236 ctx.SetVerifyParam (MonoBtlsProvider.GetVerifyParam (ServerName, IsServer));
238 TlsProtocolCode minProtocol, maxProtocol;
239 GetProtocolVersions (out minProtocol, out maxProtocol);
241 ctx.SetMinVersion ((int)minProtocol);
242 ctx.SetMaxVersion ((int)maxProtocol);
244 if (Settings != null && Settings.EnabledCiphers != null) {
245 var ciphers = new short [Settings.EnabledCiphers.Length];
246 for (int i = 0; i < ciphers.Length; i++)
247 ciphers [i] = (short)Settings.EnabledCiphers [i];
248 ctx.SetCiphers (ciphers, true);
252 void GetPeerCertificate ()
254 if (remoteCertificate != null)
256 using (var remoteCert = ssl.GetPeerCertificate ()) {
257 if (remoteCert != null)
258 remoteCertificate = MonoBtlsProvider.CreateCertificate (remoteCert);
262 void InitializeSession ()
264 GetPeerCertificate ();
266 if (IsServer && AskForClientCertificate && !certificateValidated) {
267 if (!ValidateCertificate (null, null))
268 throw new TlsException (AlertDescription.CertificateUnknown);
271 var cipher = (CipherSuiteCode)ssl.GetCipher ();
272 var protocol = (TlsProtocolCode)ssl.GetVersion ();
273 var serverName = ssl.GetServerName ();
274 Debug ("GET CONNECTION INFO: {0:x}:{0} {1:x}:{1} {2}", cipher, protocol, (TlsProtocolCode)protocol);
276 connectionInfo = new MonoTlsConnectionInfo {
277 CipherSuiteCode = cipher,
278 ProtocolVersion = GetProtocol (protocol),
279 PeerDomainName = serverName
283 static TlsProtocols GetProtocol (TlsProtocolCode protocol)
286 case TlsProtocolCode.Tls10:
287 return TlsProtocols.Tls10;
288 case TlsProtocolCode.Tls11:
289 return TlsProtocols.Tls11;
290 case TlsProtocolCode.Tls12:
291 return TlsProtocols.Tls12;
293 throw new NotSupportedException ();
297 public override void Flush ()
299 throw new NotImplementedException ();
302 public override int Read (byte[] buffer, int offset, int size, out bool wantMore)
304 Debug ("Read: {0} {1} {2}", buffer.Length, offset, size);
306 var data = Marshal.AllocHGlobal (size);
307 if (data == IntPtr.Zero)
308 throw new OutOfMemoryException ();
311 MonoBtlsError.ClearError ();
312 var status = ssl.Read (data, ref size);
313 Debug ("Read done: {0} {1}", status, size);
315 if (status == MonoBtlsSslError.WantRead) {
318 } else if (status != MonoBtlsSslError.None) {
319 throw GetException (status);
323 Marshal.Copy (data, buffer, offset, size);
328 Marshal.FreeHGlobal (data);
332 public override int Write (byte[] buffer, int offset, int size, out bool wantMore)
334 Debug ("Write: {0} {1} {2}", buffer.Length, offset, size);
336 var data = Marshal.AllocHGlobal (size);
337 if (data == IntPtr.Zero)
338 throw new OutOfMemoryException ();
341 MonoBtlsError.ClearError ();
342 Marshal.Copy (buffer, offset, data, size);
343 var status = ssl.Write (data, ref size);
344 Debug ("Write done: {0} {1}", status, size);
346 if (status == MonoBtlsSslError.WantWrite) {
349 } else if (status != MonoBtlsSslError.None) {
350 throw GetException (status);
356 Marshal.FreeHGlobal (data);
360 public override void Close ()
376 if (errbio != null) {
382 void Dispose<T> (ref T disposable)
383 where T : class, IDisposable
386 if (disposable != null)
387 disposable.Dispose ();
395 protected override void Dispose (bool disposing)
399 Dispose (ref remoteCertificate);
400 Dispose (ref nativeServerCertificate);
401 Dispose (ref nativeClientCertificate);
402 Dispose (ref clientCertificate);
406 Dispose (ref errbio);
409 base.Dispose (disposing);
413 int IMonoBtlsBioMono.Read (byte[] buffer, int offset, int size, out bool wantMore)
415 Debug ("InternalRead: {0} {1}", offset, size);
416 var ret = Parent.InternalRead (buffer, offset, size, out wantMore);
417 Debug ("InternalReadDone: {0} {1}", ret, wantMore);
421 bool IMonoBtlsBioMono.Write (byte[] buffer, int offset, int size)
423 Debug ("InternalWrite: {0} {1}", offset, size);
424 var ret = Parent.InternalWrite (buffer, offset, size);
425 Debug ("InternalWrite done: {0}", ret);
429 void IMonoBtlsBioMono.Flush ()
434 void IMonoBtlsBioMono.Close ()
439 public override bool HasContext {
440 get { return ssl != null && ssl.IsValid; }
442 public override bool IsAuthenticated {
443 get { return isAuthenticated; }
445 public override MonoTlsConnectionInfo ConnectionInfo {
446 get { return connectionInfo; }
448 internal override bool IsRemoteCertificateAvailable {
449 get { return remoteCertificate != null; }
451 internal override X509Certificate LocalClientCertificate {
452 get { return clientCertificate; }
454 public override X509Certificate RemoteCertificate {
455 get { return remoteCertificate; }
457 public override TlsProtocols NegotiatedProtocol {
458 get { return connectionInfo.ProtocolVersion; }