mcs/class/System/Mono.Btls/MonoBtlsProvider.cs

   1 //
   2 // MonoBtlsProvider.cs
   3 //
   4 // Author:
   5 //       Martin Baulig <martin.baulig@xamarin.com>
   6 //
   7 // Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
   8 //
   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:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  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
  25 // THE SOFTWARE.
  26 #if SECURITY_DEP && MONO_FEATURE_BTLS
  27 #if MONO_SECURITY_ALIAS
  28 extern alias MonoSecurity;
  29 #endif
  30
  31 using System;
  32 using System.IO;
  33 using System.Threading;
  34 using System.Threading.Tasks;
  35 using System.Security.Cryptography.X509Certificates;
  36 using System.Security.Authentication;
  37
  38 #if MONO_SECURITY_ALIAS
  39 using MonoSecurity::Mono.Security.Interface;
  40 using MX = MonoSecurity::Mono.Security.X509;
  41 #else
  42 using Mono.Security.Interface;
  43 using MX = Mono.Security.X509;
  44 #endif
  45
  46 using MNS = Mono.Net.Security;
  47
  48 namespace Mono.Btls
  49 {
  50         class MonoBtlsProvider : MonoTlsProvider
  51         {
  52                 static readonly Guid id = new Guid ("432d18c9-9348-4b90-bfbf-9f2a10e1f15b");
  53
  54                 public override Guid ID {
  55                         get { return id; }
  56                 }
  57                 public override string Name {
  58                         get { return "btls"; }
  59                 }
  60
  61                 internal MonoBtlsProvider ()
  62                 {
  63                         if (!MNS.MonoTlsProviderFactory.IsBtlsSupported ())
  64                                 throw new NotSupportedException ("BTLS is not supported in this runtime.");
  65                 }
  66
  67                 public override bool SupportsSslStream {
  68                         get { return true; }
  69                 }
  70
  71                 public override bool SupportsMonoExtensions {
  72                         get { return true; }
  73                 }
  74
  75                 public override bool SupportsConnectionInfo {
  76                         get { return true; }
  77                 }
  78
  79                 public override SslProtocols SupportedProtocols {
  80                         get { return SslProtocols.Tls12 | SslProtocols.Tls11 | SslProtocols.Tls; }
  81                 }
  82
  83                 public override IMonoSslStream CreateSslStream (
  84                         Stream innerStream, bool leaveInnerStreamOpen,
  85                         MonoTlsSettings settings = null)
  86                 {
  87                         return new MonoBtlsStream (
  88                                 innerStream, leaveInnerStreamOpen, settings, this);
  89                 }
  90
  91                 internal override bool HasNativeCertificates {
  92                         get { return true; }
  93                 }
  94
  95                 internal override X509Certificate2Impl GetNativeCertificate (
  96                         byte[] data, string password, X509KeyStorageFlags flags)
  97                 {
  98                         var impl = new X509CertificateImplBtls (false);
  99                         impl.Import (data, password, flags);
 100                         return impl;
 101                 }
 102
 103                 internal override X509Certificate2Impl GetNativeCertificate (
 104                         X509Certificate certificate)
 105                 {
 106                         var impl = certificate.Impl as X509CertificateImplBtls;
 107                         if (impl != null)
 108                                 return (X509Certificate2Impl)impl.Clone ();
 109
 110                         var data = certificate.GetRawCertData ();
 111                         return new X509CertificateImplBtls (data, MonoBtlsX509Format.DER, false);
 112                 }
 113
 114                 internal static MonoBtlsX509VerifyParam GetVerifyParam (string targetHost, bool serverMode)
 115                 {
 116                         MonoBtlsX509VerifyParam param;
 117                         if (serverMode)
 118                                 param = MonoBtlsX509VerifyParam.GetSslClient ();
 119                         else
 120                                 param = MonoBtlsX509VerifyParam.GetSslServer ();
 121
 122                         if (targetHost == null)
 123                                 return param;
 124
 125                         try {
 126                                 var copy = param.Copy ();
 127                                 copy.SetHost (targetHost);
 128                                 return copy;
 129                         } finally {
 130                                 param.Dispose ();
 131                         }
 132                 }
 133
 134                 internal override bool ValidateCertificate (
 135                         ICertificateValidator2 validator, string targetHost, bool serverMode,
 136                         X509CertificateCollection certificates, bool wantsChain, ref X509Chain chain,
 137                         ref MonoSslPolicyErrors errors, ref int status11)
 138                 {
 139                         if (chain != null) {
 140                                 var chainImpl = (X509ChainImplBtls)chain.Impl;
 141                                 var success = chainImpl.StoreCtx.VerifyResult == 1;
 142                                 CheckValidationResult (
 143                                         validator, targetHost, serverMode, certificates,
 144                                         wantsChain, chain, chainImpl.StoreCtx,
 145                                         success, ref errors, ref status11);
 146                                 return success;
 147                         }
 148
 149                         using (var store = new MonoBtlsX509Store ())
 150                         using (var nativeChain = MonoBtlsProvider.GetNativeChain (certificates))
 151                         using (var param = GetVerifyParam (targetHost, serverMode))
 152                         using (var storeCtx = new MonoBtlsX509StoreCtx ()) {
 153                                 SetupCertificateStore (store, validator.Settings, serverMode);
 154
 155                                 storeCtx.Initialize (store, nativeChain);
 156
 157                                 storeCtx.SetVerifyParam (param);
 158
 159                                 var ret = storeCtx.Verify ();
 160
 161                                 var success = ret == 1;
 162
 163                                 if (wantsChain && chain == null) {
 164                                         chain = GetManagedChain (nativeChain);
 165                                 }
 166
 167                                 CheckValidationResult (
 168                                         validator, targetHost, serverMode, certificates,
 169                                         wantsChain, null, storeCtx,
 170                                         success, ref errors, ref status11);
 171                                 return success;
 172                         }
 173                 }
 174
 175                 internal static bool ValidateCertificate (MonoBtlsX509Chain chain, MonoBtlsX509VerifyParam param)
 176                 {
 177                         using (var store = new MonoBtlsX509Store ())
 178                         using (var storeCtx = new MonoBtlsX509StoreCtx ()) {
 179                                 SetupCertificateStore (store);
 180
 181                                 storeCtx.Initialize (store, chain);
 182
 183                                 if (param != null)
 184                                         storeCtx.SetVerifyParam (param);
 185
 186                                 var ret = storeCtx.Verify ();
 187
 188                                 return ret == 1;
 189                         }
 190                 }
 191
 192                 void CheckValidationResult (
 193                         ICertificateValidator validator, string targetHost, bool serverMode,
 194                         X509CertificateCollection certificates, bool wantsChain,
 195                         X509Chain chain, MonoBtlsX509StoreCtx storeCtx,
 196                         bool success, ref MonoSslPolicyErrors errors, ref int status11)
 197                 {
 198                         if (!success) {
 199                                 errors = MonoSslPolicyErrors.RemoteCertificateChainErrors;
 200                                 status11 = unchecked((int)0x800B010B);
 201                         }
 202                 }
 203
 204                 internal static void SetupCertificateStore (MonoBtlsX509Store store, MonoTlsSettings settings, bool server)
 205                 {
 206                         if (settings?.CertificateSearchPaths == null)
 207                                 AddTrustedRoots (store, settings, server);
 208
 209 #if MONODROID
 210                         SetupCertificateStore (store);
 211                         return;
 212 #else
 213                         if (settings?.CertificateSearchPaths == null) {
 214                                 SetupCertificateStore (store);
 215                                 return;
 216                         }
 217
 218                         foreach (var path in settings.CertificateSearchPaths) {
 219                                 if (string.Equals (path, "@default", StringComparison.Ordinal)) {
 220                                         AddTrustedRoots (store, settings, server);
 221                                         AddUserStore (store);
 222                                         AddMachineStore (store);
 223                                 } else if (string.Equals (path, "@user", StringComparison.Ordinal))
 224                                         AddUserStore (store);
 225                                 else if (string.Equals (path, "@machine", StringComparison.Ordinal))
 226                                         AddMachineStore (store);
 227                                 else if (string.Equals (path, "@trusted", StringComparison.Ordinal))
 228                                         AddTrustedRoots (store, settings, server);
 229                                 else if (path.StartsWith ("@pem:", StringComparison.Ordinal)) {
 230                                         var realPath = path.Substring (5);
 231                                         if (Directory.Exists (realPath))
 232                                                 store.AddDirectoryLookup (realPath, MonoBtlsX509FileType.PEM);
 233                                 } else if (path.StartsWith ("@der:", StringComparison.Ordinal)) {
 234                                         var realPath = path.Substring (5);
 235                                         if (Directory.Exists (realPath))
 236                                                 store.AddDirectoryLookup (realPath, MonoBtlsX509FileType.ASN1);
 237                                 } else {
 238                                         if (Directory.Exists (path))
 239                                                 store.AddDirectoryLookup (path, MonoBtlsX509FileType.PEM);
 240                                 }
 241                         }
 242 #endif
 243                 }
 244
 245                 internal static void SetupCertificateStore (MonoBtlsX509Store store)
 246                 {
 247 #if MONODROID
 248                         store.SetDefaultPaths ();
 249                         store.AddAndroidLookup ();
 250 #else
 251                         AddUserStore (store);
 252                         AddMachineStore (store);
 253 #endif
 254                 }
 255
 256 #if !MONODROID
 257                 static void AddUserStore (MonoBtlsX509Store store)
 258                 {
 259                         var userPath = MonoBtlsX509StoreManager.GetStorePath (MonoBtlsX509StoreType.UserTrustedRoots);
 260                         if (Directory.Exists (userPath))
 261                                 store.AddDirectoryLookup (userPath, MonoBtlsX509FileType.PEM);
 262                 }
 263
 264                 static void AddMachineStore (MonoBtlsX509Store store)
 265                 {
 266                         var machinePath = MonoBtlsX509StoreManager.GetStorePath (MonoBtlsX509StoreType.MachineTrustedRoots);
 267                         if (Directory.Exists (machinePath))
 268                                 store.AddDirectoryLookup (machinePath, MonoBtlsX509FileType.PEM);
 269                 }
 270 #endif
 271
 272                 static void AddTrustedRoots (MonoBtlsX509Store store, MonoTlsSettings settings, bool server)
 273                 {
 274                         if (settings?.TrustAnchors == null)
 275                                 return;
 276                         var trust = server ? MonoBtlsX509TrustKind.TRUST_CLIENT : MonoBtlsX509TrustKind.TRUST_SERVER;
 277                         store.AddCollection (settings.TrustAnchors, trust);
 278                 }
 279
 280                 public static string GetSystemStoreLocation ()
 281                 {
 282 #if MONODROID
 283                         return "/system/etc/security/cacerts";
 284 #else
 285                         return MonoBtlsX509StoreManager.GetStorePath (MonoBtlsX509StoreType.MachineTrustedRoots);
 286 #endif
 287                 }
 288
 289                 public static X509Certificate CreateCertificate (byte[] data, MonoBtlsX509Format format, bool disallowFallback = false)
 290                 {
 291                         using (var impl = new X509CertificateImplBtls (data, format, disallowFallback)) {
 292                                 return new X509Certificate (impl);
 293                         }
 294                 }
 295
 296                 public static X509Certificate2 CreateCertificate2 (byte[] data, MonoBtlsX509Format format, bool disallowFallback = false)
 297                 {
 298                         using (var impl = new X509CertificateImplBtls (data, format, disallowFallback)) {
 299                                 return new X509Certificate2 (impl);
 300                         }
 301                 }
 302
 303                 public static X509Certificate2 CreateCertificate2 (byte[] data, string password, bool disallowFallback = false)
 304                 {
 305                         using (var impl = new X509CertificateImplBtls (disallowFallback)) {
 306                                 impl.Import (data, password, X509KeyStorageFlags.DefaultKeySet);
 307                                 return new X509Certificate2 (impl);
 308                         }
 309                 }
 310
 311                 public static X509Certificate CreateCertificate (MonoBtlsX509 x509)
 312                 {
 313                         using (var impl = new X509CertificateImplBtls (x509, true))
 314                                 return new X509Certificate (impl);
 315                 }
 316
 317                 public static X509Chain CreateChain ()
 318                 {
 319                         using (var impl = new X509ChainImplBtls ())
 320                                 return new X509Chain (impl);
 321                 }
 322
 323                 public static X509Chain GetManagedChain (MonoBtlsX509Chain chain)
 324                 {
 325                         var impl = new X509ChainImplBtls (chain);
 326                         return new X509Chain (impl);
 327                 }
 328
 329                 public static MonoBtlsX509 GetBtlsCertificate (X509Certificate certificate)
 330                 {
 331                         var impl = certificate.Impl as X509CertificateImplBtls;
 332                         if (impl != null)
 333                                 return impl.X509.Copy ();
 334
 335                         return MonoBtlsX509.LoadFromData (certificate.GetRawCertData (), MonoBtlsX509Format.DER);
 336                 }
 337
 338                 public static MonoBtlsX509Chain GetNativeChain (X509CertificateCollection certificates)
 339                 {
 340                         var chain = new MonoBtlsX509Chain ();
 341                         try {
 342                                 foreach (var cert in certificates) {
 343                                         using (var x509 = GetBtlsCertificate (cert))
 344                                                 chain.AddCertificate (x509);
 345                                 }
 346                                 return chain;
 347                         } catch {
 348                                 chain.Dispose ();
 349                                 throw;
 350                         }
 351                 }
 352         }
 353 }
 354 #endif