mcs/class/Mono.Security/Mono.Security.Interface/CertificateValidationHelper.cs

   1 //
   2 // CertificateValidationHelper.cs
   3 //
   4 // Author:
   5 //       Martin Baulig <martin.baulig@xamarin.com>
   6 //
   7 // Copyright (c) 2015 Xamarin, Inc.
   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
  27 using System;
  28 using System.IO;
  29 using System.Net;
  30 using System.Net.Security;
  31 using System.Threading;
  32 using System.Reflection;
  33 using System.Security.Cryptography.X509Certificates;
  34 using Mono.Security.Protocol.Tls;
  35 using MX = Mono.Security.X509;
  36 #if MOBILE
  37 using Mono.Net.Security;
  38 #endif
  39
  40 namespace Mono.Security.Interface
  41 {
  42         #if (!MONOTOUCH && !MONODROID) || INSIDE_SYSTEM
  43         public class ValidationResult
  44         {
  45                 bool trusted;
  46                 bool user_denied;
  47                 int error_code;
  48                 MonoSslPolicyErrors? policy_errors;
  49
  50                 public ValidationResult (bool trusted, bool user_denied, int error_code, MonoSslPolicyErrors? policy_errors)
  51                 {
  52                         this.trusted = trusted;
  53                         this.user_denied = user_denied;
  54                         this.error_code = error_code;
  55                         this.policy_errors = policy_errors;
  56                 }
  57
  58                 internal ValidationResult (bool trusted, bool user_defined, int error_code)
  59                 {
  60                         this.trusted = trusted;
  61                         this.user_denied = user_denied;
  62                         this.error_code = error_code;
  63                         this.policy_errors = policy_errors;
  64                 }
  65
  66                 public bool Trusted {
  67                         get { return trusted; }
  68                 }
  69
  70                 public bool UserDenied {
  71                         get { return user_denied; }
  72                 }
  73
  74                 public int ErrorCode {
  75                         get { return error_code; }
  76                 }
  77
  78                 public MonoSslPolicyErrors? PolicyErrors {
  79                         get { return policy_errors; }
  80                 }
  81         }
  82
  83         /**
  84          * Internal interface - do not implement
  85          */
  86         public interface ICertificateValidator
  87         {
  88                 MonoTlsSettings Settings {
  89                         get;
  90                 }
  91
  92                 X509Certificate SelectClientCertificate (
  93                         string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate,
  94                         string[] acceptableIssuers);
  95
  96                 ValidationResult ValidateChain (string targetHost, X509CertificateCollection certificates);
  97
  98                 ValidationResult ValidateClientCertificate (X509CertificateCollection certificates);
  99         }
 100         #endif
 101
 102         #if !INSIDE_SYSTEM
 103         public
 104         #endif
 105         static class CertificateValidationHelper
 106         {
 107                 const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
 108                 static readonly bool noX509Chain;
 109
 110                 #if !INSIDE_SYSTEM
 111                 const string InternalHelperTypeName = "Mono.Net.Security.ChainValidationHelper";
 112                 static readonly Type internalHelperType;
 113                 static readonly MethodInfo createMethod;
 114                 static readonly MethodInfo validateClientCertificateMethod;
 115                 static readonly MethodInfo validateChainMethod;
 116                 #endif
 117
 118                 static CertificateValidationHelper ()
 119                 {
 120                         #if !INSIDE_SYSTEM
 121                         internalHelperType = Type.GetType (InternalHelperTypeName + ", " + Consts.AssemblySystem, true);
 122                         if (internalHelperType == null)
 123                                 throw new NotSupportedException ();
 124                         createMethod = internalHelperType.GetMethod ("GetDefaultValidator", BindingFlags.Static | BindingFlags.NonPublic);
 125                         if (createMethod == null)
 126                                 throw new NotSupportedException ();
 127                         validateClientCertificateMethod = internalHelperType.GetMethod ("ValidateClientCertificate", BindingFlags.Instance | BindingFlags.Public);
 128                         if (validateClientCertificateMethod == null)
 129                                 throw new NotSupportedException ();
 130                         validateChainMethod = internalHelperType.GetMethod ("ValidateChain", BindingFlags.Instance | BindingFlags.Public);
 131                         if (validateChainMethod == null)
 132                                 throw new NotSupportedException ();
 133                         #endif
 134
 135                         #if MONOTOUCH || XAMMAC
 136                         noX509Chain = true;
 137                         #else
 138                         noX509Chain = File.Exists (SecurityLibrary);
 139                         #endif
 140                 }
 141
 142                 public static bool SupportsX509Chain {
 143                         get { return !noX509Chain; }
 144                 }
 145
 146                 internal static ICertificateValidator GetDefaultValidator (MonoTlsSettings settings)
 147                 {
 148                         #if INSIDE_SYSTEM
 149                         return ChainValidationHelper.GetDefaultValidator (settings);
 150                         #else
 151                         return (ICertificateValidator)createMethod.Invoke (null, new object[] { settings });
 152                         #endif
 153                 }
 154
 155                 #if !INSIDE_SYSTEM
 156                 public static ICertificateValidator GetValidator (MonoTlsSettings settings)
 157                 {
 158                         return GetDefaultValidator (settings);
 159                 }
 160                 #endif
 161         }
 162 }