2 // TestSuite.System.Security.Cryptography.DESCryptoServiceProviderTest.cs
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
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30 using System.Security.Cryptography;
32 using NUnit.Framework;
34 namespace MonoTests.System.Security.Cryptography {
37 public class DESCryptoServiceProviderTest : DESFIPS81Test {
42 des = new DESCryptoServiceProvider ();
46 public void KeyChecks ()
49 Assert.AreEqual (8, key.Length, "Key");
50 Assert.IsFalse (DES.IsWeakKey (key), "IsWeakKey");
51 Assert.IsFalse (DES.IsSemiWeakKey (key), "IsSemiWeakKey");
58 Assert.AreEqual (8, iv.Length, "IV");
61 // other tests (test vectors) are inherited from DESFIPS81Test
62 // (in DESTest.cs) but executed here
66 [ExpectedException (typeof (CryptographicException))]
68 [ExpectedException (typeof (NullReferenceException))]
70 public void CreateEncryptor_KeyNull ()
72 ICryptoTransform encryptor = des.CreateEncryptor (null, des.IV);
73 byte[] data = new byte[encryptor.InputBlockSize];
74 byte[] encdata = encryptor.TransformFinalBlock (data, 0, data.Length);
76 ICryptoTransform decryptor = des.CreateDecryptor (des.Key, des.IV);
77 byte[] decdata = decryptor.TransformFinalBlock (encdata, 0, encdata.Length);
78 // null key != SymmetricAlgorithm.Key
80 // in about 1 out of 256 runs the exception will not be thrown because the padding will be
81 // the same as expected - however this still won't produce the right results (next check)
82 Assert.IsFalse (BitConverter.ToString (data) == BitConverter.ToString (decdata), "Compare");
83 // so this case is ok too, throw the expected exception to make the unit test succeed
84 throw new CryptographicException ("1/256");
88 public void CreateEncryptor_IvNull ()
90 ICryptoTransform encryptor = des.CreateEncryptor (des.Key, null);
91 byte[] data = new byte[encryptor.InputBlockSize];
92 byte[] encdata = encryptor.TransformFinalBlock (data, 0, data.Length);
94 ICryptoTransform decryptor = des.CreateDecryptor (des.Key, des.IV);
95 byte[] decdata = decryptor.TransformFinalBlock (encdata, 0, encdata.Length);
96 Assert.IsFalse (BitConverter.ToString (data) == BitConverter.ToString (decdata), "Compare");
97 // null iv != SymmetricAlgorithm.IV
101 public void CreateEncryptor_KeyIv ()
103 byte[] originalKey = des.Key;
104 byte[] originalIV = des.IV;
106 byte[] key = (byte[]) des.Key.Clone ();
108 byte[] iv = (byte[]) des.IV.Clone ();
111 Assert.IsNotNull (des.CreateEncryptor (key, iv), "CreateEncryptor");
113 Assert.AreEqual (originalKey, des.Key, "Key");
114 Assert.AreEqual (originalIV, des.IV, "IV");
115 // SymmetricAlgorithm Key and IV not changed by CreateEncryptor
120 [ExpectedException (typeof (CryptographicException))]
122 [ExpectedException (typeof (NullReferenceException))]
124 public void CreateDecryptor_KeyNull ()
126 ICryptoTransform encryptor = des.CreateEncryptor (des.Key, des.IV);
127 byte[] data = new byte[encryptor.InputBlockSize];
128 byte[] encdata = encryptor.TransformFinalBlock (data, 0, data.Length);
130 ICryptoTransform decryptor = des.CreateDecryptor (null, des.IV);
131 byte[] decdata = decryptor.TransformFinalBlock (encdata, 0, encdata.Length);
132 // null key != SymmetricAlgorithm.Key
134 // in about 1 out of 256 runs the exception will not be thrown because the padding will be
135 // the same as expected - however this still won't produce the right results (next check)
136 Assert.IsFalse (BitConverter.ToString (data) == BitConverter.ToString (decdata), "Compare");
137 // so this case is ok too, throw the expected exception to make the unit test succeed
138 throw new CryptographicException ("1/256");
142 public void CreateDecryptor_IvNull ()
144 ICryptoTransform encryptor = des.CreateEncryptor (des.Key, des.IV);
145 byte[] data = new byte[encryptor.InputBlockSize];
146 byte[] encdata = encryptor.TransformFinalBlock (data, 0, data.Length);
148 ICryptoTransform decryptor = des.CreateDecryptor (des.Key, null);
149 byte[] decdata = decryptor.TransformFinalBlock (encdata, 0, encdata.Length);
150 Assert.IsFalse (BitConverter.ToString (data) == BitConverter.ToString (decdata), "Compare");
151 // null iv != SymmetricAlgorithm.IV
155 public void CreateDecryptor_KeyIv ()
157 byte[] originalKey = des.Key;
158 byte[] originalIV = des.IV;
160 byte[] key = (byte[]) des.Key.Clone ();
162 byte[] iv = (byte[]) des.IV.Clone ();
165 Assert.IsNotNull (des.CreateEncryptor (key, iv), "CreateDecryptor");
167 Assert.AreEqual (originalKey, des.Key, "Key");
168 Assert.AreEqual (originalIV, des.IV, "IV");
169 // SymmetricAlgorithm Key and IV not changed by CreateDecryptor
172 // Setting the IV is more restrictive than supplying an IV to
173 // CreateEncryptor and CreateDecryptor. See bug #76483
175 private ICryptoTransform CreateEncryptor_IV (int size)
177 byte[] iv = (size == -1) ? null : new byte[size];
178 return des.CreateEncryptor (des.Key, iv);
182 public void CreateEncryptor_IV_Null ()
184 CreateEncryptor_IV (-1);
189 [ExpectedException (typeof (CryptographicException))]
191 public void CreateEncryptor_IV_Zero ()
193 CreateEncryptor_IV (0);
198 [ExpectedException (typeof (CryptographicException))]
200 public void CreateEncryptor_IV_TooSmall ()
202 int size = (des.BlockSize >> 3) - 1;
203 CreateEncryptor_IV (size);
207 public void CreateEncryptor_IV_BlockSize ()
209 int size = (des.BlockSize >> 3);
210 CreateEncryptor_IV (size);
214 public void CreateEncryptor_IV_TooBig ()
216 int size = des.BlockSize; // 8 times too big
217 CreateEncryptor_IV (size);
220 private ICryptoTransform CreateDecryptor_IV (int size)
222 byte[] iv = (size == -1) ? null : new byte[size];
223 return des.CreateDecryptor (des.Key, iv);
227 public void CreateDecryptor_IV_Null ()
229 CreateDecryptor_IV (-1);
234 [ExpectedException (typeof (CryptographicException))]
236 public void CreateDecryptor_IV_Zero ()
238 CreateDecryptor_IV (0);
243 [ExpectedException (typeof (CryptographicException))]
245 public void CreateDecryptor_IV_TooSmall ()
247 int size = (des.BlockSize >> 3) - 1;
248 CreateDecryptor_IV (size);
252 public void CreateDecryptor_IV_BlockSize ()
254 int size = (des.BlockSize >> 3);
255 CreateDecryptor_IV (size);
259 public void CreateDecryptor_IV_TooBig ()
261 int size = des.BlockSize; // 8 times too big
262 CreateDecryptor_IV (size);