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                 protected void ThrowIfContextInvalid ()
  41                 {
  42                         if (!IsValid)
  43                                 throw X509Helper.GetInvalidContextException ();
  44                 }
  45
  46                 public abstract X509CertificateImpl Clone ();
  47
  48                 public abstract string GetIssuerName (bool legacyV1Mode);
  49
  50                 public abstract string GetSubjectName (bool legacyV1Mode);
  51
  52                 public abstract byte[] GetRawCertData ();
  53
  54                 public abstract DateTime GetValidFrom ();
  55
  56                 public abstract DateTime GetValidUntil ();
  57
  58                 byte[] cachedCertificateHash;
  59
  60                 public byte[] GetCertHash ()
  61                 {
  62                         ThrowIfContextInvalid ();
  63                         if (cachedCertificateHash == null)
  64                                 cachedCertificateHash = GetCertHash (false);
  65                         return cachedCertificateHash;
  66                 }
  67
  68                 protected abstract byte[] GetCertHash (bool lazy);
  69
  70                 public override int GetHashCode ()
  71                 {
  72                         if (!IsValid)
  73                                 return 0;
  74                         if (cachedCertificateHash == null)
  75                                 cachedCertificateHash = GetCertHash (true);
  76                         // return the integer of the first 4 bytes of the cert hash
  77                         if ((cachedCertificateHash != null) && (cachedCertificateHash.Length >= 4))
  78                                 return ((cachedCertificateHash [0] << 24) | (cachedCertificateHash [1] << 16) |
  79                                         (cachedCertificateHash [2] << 8) | cachedCertificateHash [3]);
  80                         else
  81                                 return 0;
  82                 }
  83
  84                 public abstract bool Equals (X509CertificateImpl other, out bool result);
  85
  86                 public abstract string GetKeyAlgorithm ();
  87
  88                 public abstract byte[] GetKeyAlgorithmParameters ();
  89
  90                 public abstract byte[] GetPublicKey ();
  91
  92                 public abstract byte[] GetSerialNumber ();
  93
  94                 public abstract byte[] Export (X509ContentType contentType, byte[] password);
  95
  96                 public abstract string ToString (bool full);
  97
  98                 public override bool Equals (object obj)
  99                 {
 100                         var other = obj as X509CertificateImpl;
 101                         if (other == null)
 102                                 return false;
 103
 104                         if (!IsValid || !other.IsValid)
 105                                 return false;
 106
 107                         bool result;
 108                         if (Equals (other, out result))
 109                                 return result;
 110
 111                         var ourRaw = GetRawCertData ();
 112                         var theirRaw = other.GetRawCertData ();
 113
 114                         if (ourRaw == null)
 115                                 return theirRaw == null;
 116                         else if (theirRaw == null)
 117                                 return false;
 118
 119                         if (ourRaw.Length != theirRaw.Length)
 120                                 return false;
 121
 122                         for (int i = 0; i < ourRaw.Length; i++) {
 123                                 if (ourRaw [i] != theirRaw [i])
 124                                         return false;
 125                         }
 126
 127                         return true;
 128                 }
 129
 130                 public void Dispose ()
 131                 {
 132                         Dispose (true);
 133                         GC.SuppressFinalize (this);
 134                 }
 135
 136                 protected virtual void Dispose (bool disposing)
 137                 {
 138                         cachedCertificateHash = null;
 139                 }
 140
 141                 ~X509CertificateImpl ()
 142                 {
 143                         Dispose (false);
 144                 }
 145         }
 146 }