mcs/class/corlib/System.Security.Cryptography/RSAPKCS1SignatureDeformatter.cs

   1 //
   2 // RSAPKCS1SignatureDeformatter.cs - Handles PKCS#1 v.1.5 signature decryption.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (spouliot@motus.com)
   6 //
   7 // (C) 2002 Motus Technologies Inc. (http://www.motus.com)
   8 //
   9
  10 using System;
  11
  12 namespace System.Security.Cryptography {
  13
  14 public class RSAPKCS1SignatureDeformatter : AsymmetricSignatureDeformatter {
  15
  16         private RSA rsa;
  17         private HashAlgorithm hash;
  18
  19         public RSAPKCS1SignatureDeformatter ()
  20         {
  21                 rsa = null;
  22         }
  23
  24         public RSAPKCS1SignatureDeformatter (AsymmetricAlgorithm key)
  25         {
  26                 SetKey (key);
  27         }
  28
  29         public override void SetHashAlgorithm (string strName)
  30         {
  31                 hash = HashAlgorithm.Create (strName);
  32         }
  33
  34         public override void SetKey (AsymmetricAlgorithm key)
  35         {
  36                 if (key != null) {
  37                         if (key is RSA) {
  38                                 rsa = (RSA)key;
  39                         }
  40                         else
  41                                 throw new InvalidCastException ();
  42                 }
  43                 // here null is accepted!
  44         }
  45
  46         [MonoTODO()]
  47         public override bool VerifySignature (byte[] rgbHash, byte[] rgbSignature)
  48         {
  49                 if ((rsa == null) || (hash == null))
  50                         throw new CryptographicUnexpectedOperationException ();
  51                 if ((rgbHash == null) || (rgbSignature == null))
  52                         throw new ArgumentNullException ();
  53                 // TODO
  54                 return false;
  55         }
  56
  57         [MonoTODO()]
  58         public override bool VerifySignature (HashAlgorithm hash, byte[] rgbSignature)
  59         {
  60                 if ((hash == null) || (rgbSignature == null))
  61                         throw new ArgumentNullException ();
  62                 if ((rsa == null) || (hash == null))
  63                         throw new CryptographicUnexpectedOperationException ();
  64                 // TODO
  65                 return false;
  66         }
  67 }
  68
  69 }