mcs/class/corlib/System.Security.Cryptography.X509Certificates/X509CertificateImpl.cs

   1 //
   2 // X509Helpers.cs: X.509 helper and utility functions.
   3 //
   4 // Authors:
   5 //      Martin Baulig  <martin.baulig@xamarin.com>
   6 //
   7 // Copyright (C) 2015 Xamarin, Inc. (http://www.xamarin.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 namespace System.Security.Cryptography.X509Certificates
  29 {
  30         internal abstract class X509CertificateImpl : IDisposable
  31         {
  32                 public abstract bool IsValid {
  33                         get;
  34                 }
  35
  36                 public abstract IntPtr Handle {
  37                         get;
  38                 }
  39
  40                 /*
  41                  * This is used in System.dll's OSX509Certificates.cs
  42                  */
  43                 public abstract IntPtr GetNativeAppleCertificate ();
  44
  45                 protected void ThrowIfContextInvalid ()
  46                 {
  47                         if (!IsValid)
  48                                 throw X509Helper.GetInvalidContextException ();
  49                 }
  50
  51                 public abstract X509CertificateImpl Clone ();
  52
  53                 public abstract string GetIssuerName (bool legacyV1Mode);
  54
  55                 public abstract string GetSubjectName (bool legacyV1Mode);
  56
  57                 public abstract byte[] GetRawCertData ();
  58
  59                 public abstract DateTime GetValidFrom ();
  60
  61                 public abstract DateTime GetValidUntil ();
  62
  63                 byte[] cachedCertificateHash;
  64
  65                 public byte[] GetCertHash ()
  66                 {
  67                         ThrowIfContextInvalid ();
  68                         if (cachedCertificateHash == null)
  69                                 cachedCertificateHash = GetCertHash (false);
  70                         return cachedCertificateHash;
  71                 }
  72
  73                 protected abstract byte[] GetCertHash (bool lazy);
  74
  75                 public override int GetHashCode ()
  76                 {
  77                         if (!IsValid)
  78                                 return 0;
  79                         if (cachedCertificateHash == null)
  80                                 cachedCertificateHash = GetCertHash (true);
  81                         // return the integer of the first 4 bytes of the cert hash
  82                         if ((cachedCertificateHash != null) && (cachedCertificateHash.Length >= 4))
  83                                 return ((cachedCertificateHash [0] << 24) | (cachedCertificateHash [1] << 16) |
  84                                         (cachedCertificateHash [2] << 8) | cachedCertificateHash [3]);
  85                         else
  86                                 return 0;
  87                 }
  88
  89                 public abstract bool Equals (X509CertificateImpl other, out bool result);
  90
  91                 public abstract string GetKeyAlgorithm ();
  92
  93                 public abstract byte[] GetKeyAlgorithmParameters ();
  94
  95                 public abstract byte[] GetPublicKey ();
  96
  97                 public abstract byte[] GetSerialNumber ();
  98
  99                 public abstract byte[] Export (X509ContentType contentType, byte[] password);
 100
 101                 public abstract string ToString (bool full);
 102
 103                 public override bool Equals (object obj)
 104                 {
 105                         var other = obj as X509CertificateImpl;
 106                         if (other == null)
 107                                 return false;
 108
 109                         if (!IsValid || !other.IsValid)
 110                                 return false;
 111
 112                         bool result;
 113                         if (Equals (other, out result))
 114                                 return result;
 115
 116                         var ourRaw = GetRawCertData ();
 117                         var theirRaw = other.GetRawCertData ();
 118
 119                         if (ourRaw == null)
 120                                 return theirRaw == null;
 121                         else if (theirRaw == null)
 122                                 return false;
 123
 124                         if (ourRaw.Length != theirRaw.Length)
 125                                 return false;
 126
 127                         for (int i = 0; i < ourRaw.Length; i++) {
 128                                 if (ourRaw [i] != theirRaw [i])
 129                                         return false;
 130                         }
 131
 132                         return true;
 133                 }
 134
 135                 public void Dispose ()
 136                 {
 137                         Dispose (true);
 138                         GC.SuppressFinalize (this);
 139                 }
 140
 141                 protected virtual void Dispose (bool disposing)
 142                 {
 143                         cachedCertificateHash = null;
 144                 }
 145
 146                 ~X509CertificateImpl ()
 147                 {
 148                         Dispose (false);
 149                 }
 150         }
 151 }