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.Security.Cryptography.X509Certificates;
  33 using Mono.Security.Protocol.Tls;
  34 using MX = Mono.Security.X509;
  35 using Mono.Net.Security;
  36
  37 namespace Mono.Security.Interface
  38 {
  39         #if (!MONOTOUCH && !MONODROID) || INSIDE_SYSTEM
  40         public class ValidationResult
  41         {
  42                 bool trusted;
  43                 bool user_denied;
  44                 int error_code;
  45                 MonoSslPolicyErrors? policy_errors;
  46
  47                 public ValidationResult (bool trusted, bool user_denied, int error_code, MonoSslPolicyErrors? policy_errors)
  48                 {
  49                         this.trusted = trusted;
  50                         this.user_denied = user_denied;
  51                         this.error_code = error_code;
  52                         this.policy_errors = policy_errors;
  53                 }
  54
  55                 internal ValidationResult (bool trusted, bool user_defined, int error_code)
  56                 {
  57                         this.trusted = trusted;
  58                         this.user_denied = user_denied;
  59                         this.error_code = error_code;
  60                         this.policy_errors = policy_errors;
  61                 }
  62
  63                 public bool Trusted {
  64                         get { return trusted; }
  65                 }
  66
  67                 public bool UserDenied {
  68                         get { return user_denied; }
  69                 }
  70
  71                 public int ErrorCode {
  72                         get { return error_code; }
  73                 }
  74
  75                 public MonoSslPolicyErrors? PolicyErrors {
  76                         get { return policy_errors; }
  77                 }
  78         }
  79
  80         /**
  81          * Internal interface - do not implement
  82          */
  83         public interface ICertificateValidator
  84         {
  85                 MonoTlsSettings Settings {
  86                         get;
  87                 }
  88
  89                 X509Certificate SelectClientCertificate (
  90                         string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate,
  91                         string[] acceptableIssuers);
  92
  93                 ValidationResult ValidateChain (string targetHost, X509CertificateCollection certificates);
  94
  95                 ValidationResult ValidateClientCertificate (X509CertificateCollection certificates);
  96         }
  97
  98         public static class CertificateValidationHelper
  99         {
 100                 const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
 101                 static readonly bool noX509Chain;
 102                 static readonly bool supportsTrustAnchors;
 103
 104                 static CertificateValidationHelper ()
 105                 {
 106                         #if MONOTOUCH || XAMMAC
 107                         noX509Chain = true;
 108                         supportsTrustAnchors = true;
 109                         #elif MONODROID
 110                         noX509Chain = true;
 111                         supportsTrustAnchors = false;
 112                         #else
 113                         if (File.Exists (SecurityLibrary)) {
 114                                 noX509Chain = true;
 115                                 supportsTrustAnchors = true;
 116                         } else {
 117                                 noX509Chain = false;
 118                                 supportsTrustAnchors = false;
 119                         }
 120                         #endif
 121                 }
 122
 123                 public static bool SupportsX509Chain {
 124                         get { return !noX509Chain; }
 125                 }
 126
 127                 public static bool SupportsTrustAnchors {
 128                         get { return supportsTrustAnchors; }
 129                 }
 130
 131                 internal static ICertificateValidator GetDefaultValidator (MonoTlsSettings settings)
 132                 {
 133                         return (ICertificateValidator)NoReflectionHelper.GetDefaultCertificateValidator (settings);
 134                 }
 135
 136                 public static ICertificateValidator GetValidator (MonoTlsSettings settings)
 137                 {
 138                         return GetDefaultValidator (settings);
 139                 }
 140         }
 141 #endif
 142 }