mcs/class/corlib/Test/System.Security.Cryptography/RSAPKCS1SignatureDeformatterTest.cs

   1 //
   2 // RSAPKCS1SignatureDeformatterTest.cs - NUnit tests for PKCS#1 v.1.5 signature.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (sebastien@ximian.com)
   6 //
   7 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // (C) 2004 Novell (http://www.novell.com)
   9 //
  10
  11 using NUnit.Framework;
  12 using System;
  13 using System.Security.Cryptography;
  14
  15 namespace MonoTests.System.Security.Cryptography {
  16
  17         [TestFixture]
  18         public class RSAPKCS1SignatureDeformatterTest : Assertion {
  19
  20                 private static byte[] shaSignature = { 0x51, 0xE1, 0x69, 0xC4, 0x84, 0x0C, 0x33, 0xD9, 0x80, 0xC0, 0xBD, 0x85, 0x87, 0x6E, 0x85, 0x91, 0xB9, 0xD5, 0xB6, 0xE1, 0xAB, 0xD3, 0x06, 0x83, 0xCF, 0x33, 0x56, 0xB9, 0xE6, 0x2C, 0x37, 0xC0, 0x08, 0xFC, 0x81, 0x15, 0xAB, 0x57, 0x80, 0xE4, 0xB9, 0x95, 0x4B, 0xFA, 0x63, 0x13, 0x5E, 0xA9, 0x6E, 0xAB, 0xB0, 0x89, 0xF3, 0xD0, 0xE9, 0xC7, 0xE7, 0xA0, 0xE2, 0xB6, 0x0A, 0xFF, 0x46, 0x2B, 0x8B, 0xC1, 0x4C, 0xEA, 0xDB, 0xEA, 0xD6, 0xF5, 0xA5, 0x2C, 0x8C, 0x1D, 0x57, 0xDF, 0x2D, 0xF0, 0x6B, 0x1D, 0xA9, 0xAE, 0x7F, 0x10, 0x02, 0xE2, 0x05, 0x7E, 0xD2, 0x80, 0xFC, 0x0E, 0x5A, 0xFD, 0xE9, 0xDB, 0x1B, 0xBA, 0xB4, 0xF7, 0x50, 0x88, 0x73, 0x95, 0xBD, 0x3C, 0xCB, 0x33, 0x02, 0xF5, 0x55, 0x10, 0xA6, 0x1B, 0xFD, 0x1D, 0xB1, 0x0E, 0xE3, 0xD0, 0xB7, 0x14, 0x8D, 0x45, 0xC4, 0xF3 };
  21                 private static byte[] md5Signature = { 0xB4, 0xA9, 0xE9, 0x76, 0x04, 0x0E, 0x0E, 0x04, 0xA3, 0x68, 0x9E, 0x50, 0xD1, 0x29, 0x07, 0x22, 0x45, 0x41, 0x72, 0x1F, 0xBE, 0x74, 0x78, 0xDA, 0x5F, 0x22, 0x4B, 0x45, 0xA8, 0x5F, 0x2D, 0xA5, 0x5F, 0x01, 0x84, 0xA7, 0xF3, 0x6E, 0xB8, 0x8B, 0xF3, 0x29, 0xB2, 0x82, 0xE6, 0x5D, 0x1A, 0x98, 0xAE, 0x9C, 0x2E, 0xB0, 0xDD, 0x3F, 0x8D, 0xF9, 0x1C, 0x9E, 0x40, 0x25, 0x01, 0x9F, 0x92, 0x4E, 0xBE, 0x11, 0xE5, 0xE8, 0xE0, 0xF6, 0x3E, 0xDF, 0x8D, 0x1A, 0xC7, 0x26, 0x37, 0xF7, 0x01, 0x95, 0x48, 0xD8, 0x07, 0x4D, 0x0E, 0xDE, 0xB2, 0x76, 0xD1, 0x23, 0xBD, 0x74, 0xE9, 0xC3, 0x63, 0xB3, 0xE7, 0xCE, 0xA2, 0xEA, 0x20, 0x19, 0x1C, 0x4D, 0x8D, 0xBB, 0xAB, 0x6E, 0xB0, 0xD0, 0x08, 0xC2, 0x2B, 0x69, 0xA4, 0xF3, 0xE9, 0x23, 0xAC, 0x93, 0xB2, 0x0F, 0x90, 0x95, 0x6A, 0x66, 0xDC, 0x44 };
  22
  23                 private static RSA rsa;
  24                 private static DSA dsa;
  25
  26                 [SetUp]
  27                 public void SetUp ()
  28                 {
  29                         shaSignature [0] = 0x51;
  30                         md5Signature [0] = 0xB4;
  31
  32                         if (rsa == null)
  33                                 rsa = RSA.Create ();
  34                         if (dsa == null)
  35                                 dsa = DSA.Create ();
  36                 }
  37
  38                 public void AssertEquals (string msg, byte[] array1, byte[] array2)
  39                 {
  40                         AllTests.AssertEquals (msg, array1, array2);
  41                 }
  42
  43                 [Test]
  44                 public void RSAConstructors ()
  45                 {
  46                         RSAPKCS1SignatureDeformatter fmt;
  47                         fmt = new RSAPKCS1SignatureDeformatter ();
  48                         AssertNotNull ("RSAPKCS1SignatureDeformatter()", fmt);
  49
  50                         fmt = new RSAPKCS1SignatureDeformatter (null);
  51                         AssertNotNull ("RSAPKCS1SignatureDeformatter(null)", fmt);
  52
  53                         fmt = new RSAPKCS1SignatureDeformatter (rsa);
  54                         AssertNotNull ("RSAPKCS1SignatureDeformatter(rsa)", fmt);
  55                 }
  56
  57                 [Test]
  58                 [ExpectedException (typeof (InvalidCastException))]
  59                 public void DSAConstructor ()
  60                 {
  61                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter (dsa);
  62                 }
  63
  64                 [Test]
  65                 public void SetRSAKey ()
  66                 {
  67                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
  68                         fmt.SetKey (rsa);
  69                 }
  70
  71                 [Test]
  72                 [ExpectedException (typeof (InvalidCastException))]
  73                 public void SetDSAKey ()
  74                 {
  75                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
  76                         fmt.SetKey (dsa);
  77                 }
  78
  79                 [Test]
  80                 public void SetNullKey ()
  81                 {
  82                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
  83                         fmt.SetKey (null);
  84                 }
  85
  86                 [Test]
  87                 [ExpectedException (typeof (ArgumentNullException))]
  88                 public void SetNullHashAlgorithm ()
  89                 {
  90                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
  91                         fmt.SetHashAlgorithm (null);
  92                 }
  93
  94                 [Test]
  95                 public void SetInvalidHashAlgorithm ()
  96                 {
  97                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
  98                         fmt.SetHashAlgorithm ("MD3");
  99                 }
 100
 101                 [Test]
 102                 public void SetSHA1HashAlgorithm ()
 103                 {
 104                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 105                         fmt.SetHashAlgorithm ("SHA1");
 106                 }
 107
 108                 [Test]
 109                 public void SetMD5HashAlgorithm ()
 110                 {
 111                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 112                         fmt.SetHashAlgorithm ("MD5");
 113                 }
 114
 115                 [Test]
 116                 public void SetSHA256HashAlgorithm ()
 117                 {
 118                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 119                         fmt.SetHashAlgorithm ("SHA256");
 120                 }
 121
 122                 [Test]
 123                 public void SetSHA384HashAlgorithm ()
 124                 {
 125                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 126                         fmt.SetHashAlgorithm ("SHA384");
 127                 }
 128
 129                 [Test]
 130                 public void SetSHA512HashAlgorithm ()
 131                 {
 132                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 133                         fmt.SetHashAlgorithm ("SHA512");
 134                 }
 135
 136                 [Test]
 137                 [ExpectedException (typeof (ArgumentNullException))]
 138                 public void VerifySignatureNullHash ()
 139                 {
 140                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 141                         fmt.SetHashAlgorithm ("SHA1");
 142                         fmt.SetKey (rsa);
 143                         byte[] hash = null;
 144                         byte[] signature = new byte [128];
 145                         fmt.VerifySignature (hash, signature);
 146                 }
 147
 148                 [Test]
 149                 [ExpectedException (typeof (ArgumentNullException))]
 150                 public void VerifySignatureNullSignature ()
 151                 {
 152                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 153                         fmt.SetHashAlgorithm ("SHA1");
 154                         fmt.SetKey (rsa);
 155                         byte[] hash = new byte [20];
 156                         fmt.VerifySignature (hash, null);
 157                 }
 158
 159                 [Test]
 160                 [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 161                 public void VerifySignatureWithBadHash ()
 162                 {
 163                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 164                         fmt.SetKey (rsa);
 165                         // no hash algorithm
 166                         byte[] hash = new byte [1];
 167                         byte[] signature = new byte [1];
 168                         fmt.VerifySignature (hash, signature);
 169                 }
 170
 171                 [Test]
 172 // v.1.0        [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 173 // v.1.1        [ExpectedException (typeof (NullReferenceException))]
 174                 public void VerifySHA1SignatureWithNullKey ()
 175                 {
 176                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 177                         fmt.SetHashAlgorithm ("SHA1");
 178                         byte[] hash = new byte [20];
 179                         try {
 180                                 // no key
 181                                 fmt.VerifySignature (hash, shaSignature);
 182                                 Fail ("VerifySHA1SignatureWithNullKey - Expected CryptographicUnexpectedOperationException but none");
 183                         }
 184                         catch (CryptographicUnexpectedOperationException) {
 185                                 // this was expected
 186                         }
 187                         catch (NullReferenceException) {
 188                                 // this wasn't expected - but that's the result from framework 1.1
 189                         }
 190                         catch (Exception e) {
 191                                 Fail ("VerifySHA1SignatureWithNullKey - Expected CryptographicUnexpectedOperationException but got: " + e.ToString ());
 192                         }
 193                 }
 194
 195                 private RSAPKCS1SignatureDeformatter GetDefaultDeformatter (string hashName)
 196                 {
 197                         // no need for the private key
 198                         RSA rsa = RSA.Create ();
 199                         rsa.ImportParameters (AllTests.GetRsaKey (false));
 200
 201                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 202                         fmt.SetKey (rsa);
 203                         fmt.SetHashAlgorithm (hashName);
 204                         return fmt;
 205                 }
 206
 207                 [Test]
 208                 public void VerifySHA1SignatureWithRSAKey ()
 209                 {
 210                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("SHA1");
 211                         // good SHA1
 212                         byte[] hash = new byte [20];
 213                         Assert ("VerifySignature(SHA1, sign)", fmt.VerifySignature (hash, shaSignature));
 214                         // bad signature
 215                         shaSignature [0] = (byte) ~shaSignature [0];
 216                         Assert ("VerifySignature(SHA1, badSign)", !fmt.VerifySignature (hash, shaSignature));
 217                 }
 218
 219                 [Test]
 220                 [ExpectedException (typeof (CryptographicException))]
 221                 public void VerifySHA1SignatureWithWrongHashLength ()
 222                 {
 223                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("SHA1");
 224                         // wrong SHA1 length
 225                         byte[] hash = new byte [19];
 226                         fmt.VerifySignature (hash, shaSignature);
 227                 }
 228
 229                 [Test]
 230                 public void VerifySHA1SignatureWithWrongSignatureLength ()
 231                 {
 232                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("SHA1");
 233                         // wrong signature length
 234                         byte[] hash = new byte [20];
 235                         byte[] badSignature = new byte [shaSignature.Length-1];
 236                         Assert ("VerifySignature(SHA1, badSign)", !fmt.VerifySignature (hash, badSignature));
 237                 }
 238
 239                 [Test]
 240                 public void VerifyMD5SignatureWithRSAKey ()
 241                 {
 242                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 243                         // good MD5
 244                         byte[] hash = new byte [16];
 245                         Assert ("VerifySignature(MD5, sign)", fmt.VerifySignature (hash, md5Signature));
 246                         // bad signature
 247                         md5Signature [0] = (byte) ~md5Signature [0];
 248                         Assert ("VerifySignature(MD5, badSign)", !fmt.VerifySignature (hash, md5Signature));
 249                 }
 250
 251                 [Test]
 252                 [ExpectedException (typeof (CryptographicException))]
 253                 public void VerifyMD5SignatureWithWrongHashLength ()
 254                 {
 255                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 256                         // wrong MD5 length
 257                         byte[] hash = new byte [17];
 258                         fmt.VerifySignature (hash, md5Signature);
 259                 }
 260
 261                 [Test]
 262                 public void VerifyMD5SignatureWithWrongSignatureLength ()
 263                 {
 264                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 265                         // wrong signature length
 266                         byte[] hash = new byte [16];
 267                         byte[] badSignature = new byte [md5Signature.Length-1];
 268                         Assert ("VerifySignature(MD5, badSign)", !fmt.VerifySignature (hash, badSignature));
 269                 }
 270
 271                 [Test]
 272                 [ExpectedException (typeof (ArgumentNullException))]
 273                 public void VerifySignatureNullHashAlgorithm ()
 274                 {
 275                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 276                         HashAlgorithm hash = null;
 277                         byte[] data = new byte [20];
 278                         // no hash algorithm
 279                         byte[] signature = new byte [1];
 280                         fmt.VerifySignature (hash, signature);
 281                 }
 282
 283                 [Test]
 284 // v.1.0        [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 285 // v.1.1        [ExpectedException (typeof (NullReferenceException))]
 286                 public void VerifySignatureHashNoKey ()
 287                 {
 288                         RSAPKCS1SignatureDeformatter fmt = new RSAPKCS1SignatureDeformatter ();
 289                         HashAlgorithm hash = hash = SHA1.Create ();
 290                         try {
 291                                 // no key
 292                                 fmt.VerifySignature (hash, shaSignature);
 293                                 Fail ("VerifySignatureHashNoKey - Expected CryptographicUnexpectedOperationException but none");
 294                         }
 295                         catch (CryptographicUnexpectedOperationException) {
 296                                 // this was expected
 297                         }
 298                         catch (NullReferenceException) {
 299                                 // this wasn't expected - but that's the result from framework 1.1
 300                         }
 301                         catch (Exception e) {
 302                                 Fail ("VerifySignatureHashNoKey - Expected CryptographicUnexpectedOperationException but got: " + e.ToString ());
 303                         }
 304                 }
 305
 306                 [Test]
 307                 public void VerifySignatureSHA1Hash ()
 308                 {
 309                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("SHA1");
 310                         // good SHA1
 311                         byte[] data = new byte [20];
 312                         HashAlgorithm hash = SHA1.Create ();
 313                         hash.ComputeHash (data);
 314
 315                         byte[] shaSignature = { 0x7C, 0xA0, 0x13, 0xFB, 0xCB, 0x4D, 0x08, 0x02, 0x3C, 0x6B, 0x88, 0xA6, 0x25, 0x43, 0x17, 0x51, 0xA6, 0xA8, 0x8F, 0x5B, 0xAE, 0xC3, 0x57, 0x75, 0x2A, 0x8B, 0xD8, 0xBA, 0xCF, 0x9B, 0xBB, 0x5A, 0xD5, 0xB0, 0x11, 0xF2, 0xA9, 0xCC, 0xB5, 0x22, 0x59, 0xEE, 0x85, 0x49, 0x11, 0xB6, 0x9C, 0x50, 0x61, 0x4A, 0xEC, 0xA3, 0x50, 0x96, 0xE3, 0x2F, 0x1A, 0x6D, 0x9B, 0x6B, 0x6E, 0xC4, 0x50, 0x50, 0x84, 0x29, 0x92, 0x93, 0xE0, 0x0F, 0xCB, 0xBB, 0x61, 0x5D, 0x36, 0x51, 0x1A, 0xBB, 0x73, 0x75, 0x83, 0xEF, 0xDB, 0x4B, 0x2A, 0x38, 0x2C, 0x37, 0x0A, 0x1F, 0x84, 0xE0, 0x9B, 0x24, 0xDF, 0x69, 0x0E, 0x5C, 0xD9, 0xAF, 0x89, 0x72, 0x45, 0x30, 0xA1, 0xDB, 0xA8, 0x22, 0x40, 0x42, 0x07, 0xCC, 0x2A, 0x0E, 0x90, 0x9A, 0x4D, 0xE5, 0x2B, 0x48, 0x86, 0x4D, 0x01, 0x25, 0x23, 0x95, 0xB5, 0xBD };
 316                         Assert ("VerifySignature(SHA1, sign)", fmt.VerifySignature (hash, shaSignature));
 317                         // bad signature
 318                         shaSignature [0] = (byte) ~shaSignature [0];
 319                         Assert ("VerifySignature(SHA1, badSign)", !fmt.VerifySignature (hash, shaSignature));
 320                 }
 321
 322                 [Test]
 323 // v.1.0        [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 324 // v.1.1        [ExpectedException (typeof (NullReferenceException))]
 325                 public void VerifySignatureSHA1HashBadSignatureLength ()
 326                 {
 327                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("SHA1");
 328                         // wrong signature length
 329                         byte[] badSignature = new byte [shaSignature.Length-1];
 330                         HashAlgorithm hash = SHA1.Create ();
 331                         try {
 332                                 fmt.VerifySignature (hash, badSignature);
 333                                 Fail ("VerifySignatureSHA1HashBadSignatureLength - Expected CryptographicUnexpectedOperationException but none");
 334                         }
 335                         catch (CryptographicUnexpectedOperationException) {
 336                                 // this was expected
 337                         }
 338                         catch (NullReferenceException) {
 339                                 // this wasn't expected - but that's the result from framework 1.1
 340                         }
 341                         catch (Exception e) {
 342                                 Fail ("VerifySignatureSHA1HashBadSignatureLength - Expected CryptographicUnexpectedOperationException but got: " + e.ToString ());
 343                         }
 344                 }
 345
 346                 [Test]
 347                 public void VerifySignatureMD5Hash ()
 348                 {
 349                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 350                         // good MD5
 351                         byte[] data = new byte [20];
 352                         HashAlgorithm hash = MD5.Create ();
 353                         hash.ComputeHash (data);
 354                         byte[] signature = { 0x0F, 0xD6, 0x16, 0x2C, 0x31, 0xD6, 0xD7, 0xA0, 0xE8, 0xA0, 0x89, 0x53, 0x7B, 0x36, 0x8F, 0x25, 0xA5, 0xF6, 0x4A, 0x0B, 0xD3, 0xB9, 0x9B, 0xC4, 0xAE, 0xDC, 0xD4, 0x58, 0x5C, 0xD9, 0x58, 0x61, 0xE3, 0x66, 0x89, 0xB1, 0x1E, 0x33, 0x88, 0xDF, 0x58, 0xC4, 0x2E, 0xAE, 0xE7, 0x7B, 0x96, 0x61, 0x77, 0x91, 0xBD, 0xBD, 0x99, 0x9E, 0x1C, 0x3E, 0x0A, 0x5C, 0x15, 0x69, 0x00, 0xFA, 0xEE, 0xD7, 0xDC, 0xD2, 0x62, 0xA3, 0x31, 0x6A, 0x33, 0x75, 0xC8, 0x8E, 0x47, 0x5C, 0x1E, 0xD8, 0x91, 0x36, 0x65, 0xF3, 0x67, 0x63, 0xFC, 0x2B, 0x37, 0x7D, 0xE6, 0x2C, 0x2C, 0x09, 0x45, 0xE1, 0x8D, 0x8C, 0x8F, 0xFC, 0x6A, 0x4A, 0xD1, 0x4D, 0x06, 0xF3, 0x79, 0x9F, 0xDB, 0x0F, 0x4B, 0xD1, 0x94, 0x6F, 0xC7, 0xE7, 0x4E, 0x06, 0xDA, 0xDB, 0x2A, 0x51, 0x62, 0xCA, 0x1A, 0x31, 0x51, 0x2B, 0x83, 0xDD };
 355                         Assert ("VerifySignature(MD5, sign)", fmt.VerifySignature (hash, signature));
 356                 }
 357
 358                 [Test]
 359 // v.1.0        [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 360 // v.1.1        [ExpectedException (typeof (NullReferenceException))]
 361                 public void VerifyBadSignatureMD5Hash ()
 362                 {
 363                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 364                         // bad signature
 365                         byte[] badSignature = new Byte [md5Signature.Length];
 366                         Array.Copy (md5Signature, 0, badSignature, 0, badSignature.Length);
 367                         badSignature[0] = (byte) ~md5Signature [0];
 368                         HashAlgorithm hash = MD5.Create ();
 369                         try {
 370                                 fmt.VerifySignature (hash, md5Signature);
 371                                 Fail ("VerifyBadSignatureMD5Hash - Expected CryptographicUnexpectedOperationException but none");
 372                         }
 373                         catch (CryptographicUnexpectedOperationException) {
 374                                 // this was expected
 375                         }
 376                         catch (NullReferenceException) {
 377                                 // this wasn't expected - but that's the result from framework 1.1
 378                         }
 379                         catch (Exception e) {
 380                                 Fail ("VerifyBadSignatureMD5Hash - Expected CryptographicUnexpectedOperationException but got: " + e.ToString ());
 381                         }
 382                 }
 383
 384                 [Test]
 385 // v.1.0        [ExpectedException (typeof (CryptographicUnexpectedOperationException))]
 386 // v.1.1        [ExpectedException (typeof (NullReferenceException))]
 387                 public void VerifySignatureMD5HashBadSignatureLength ()
 388                 {
 389                         RSAPKCS1SignatureDeformatter fmt = GetDefaultDeformatter ("MD5");
 390                         // wrong signature length
 391                         byte[] badSignature = new byte [md5Signature.Length-1];
 392                         HashAlgorithm hash = MD5.Create ();
 393                         try {
 394                                 fmt.VerifySignature (hash, md5Signature);
 395                                 Fail ("VerifySignatureMD5HashBadSignatureLength - Expected CryptographicUnexpectedOperationException but none");
 396                         }
 397                         catch (CryptographicUnexpectedOperationException) {
 398                                 // this was expected
 399                         }
 400                         catch (NullReferenceException) {
 401                                 // this wasn't expected - but that's the result from framework 1.1
 402                         }
 403                         catch (Exception e) {
 404                                 Fail ("VerifySignatureMD5HashBadSignatureLength - Expected CryptographicUnexpectedOperationException but got: " + e.ToString ());
 405                         }
 406                 }
 407         }
 408 }