2004-06-16 Sebastien Pouliot <sebastien@ximian.com>

[mono.git] / mcs / class / corlib / System.Security.Cryptography / KeySizes.cs

diff --git a/mcs/class/corlib/System.Security.Cryptography/KeySizes.cs b/mcs/class/corlib/System.Security.Cryptography/KeySizes.cs
index 6bdb2b658f3c1e92613708e2c225f548d7483500..6594d2a7661e5a50e67a4732b48ae45f8232f974 100644 (file)
--- a/mcs/class/corlib/System.Security.Cryptography/KeySizes.cs
+++ b/mcs/class/corlib/System.Security.Cryptography/KeySizes.cs
@@ -1,61 +1,82 @@
-//\r
-// System.Security.Cryptography KeySizes Class implementation\r
-//\r
-// Author:\r
-//   Matthew S. Ford (Matthew.S.Ford@Rose-Hulman.Edu)\r
-//\r
-// Copyright 2001 by Matthew S. Ford.\r
-//\r
-\r
-\r
-namespace System.Security.Cryptography {\r
-       \r
-       /// <summary>\r
-       /// This class represents valid ranges of key sizes for ciphers.  It is also used to represent block sizes in the same fashion for block ciphers.\r
-       /// </summary>\r
-       public class KeySizes {\r
-               private int _maxSize;\r
-               private int _minSize;\r
-               private int _skipSize;\r
-\r
-               /// <summary>\r
-               /// Creates a new KeySizes object.\r
-               /// </summary>\r
-               /// <param name="minSize">The minimum size key allowed for this cipher in bits.</param>\r
-               /// <param name="maxSize">The maximum size key allowed for this cipher in bits.</param>\r
-               /// <param name="skipSize">The jump/skip between the valid key sizes in bits.</param>\r
-               public KeySizes (int minSize, int maxSize, int skipSize) {\r
-                       _maxSize = maxSize;\r
-                       _minSize = minSize;\r
-                       _skipSize = skipSize;\r
-               }\r
-               \r
-               /// <summary>\r
-               /// Returns the maximum valid key size in bits;\r
-               /// </summary>\r
-               public int MaxSize {\r
-                       get {\r
-                               return _maxSize;\r
-                       }\r
-               }\r
-               \r
-               /// <summary>\r
-               /// Returns the minimum valid key size in bits;\r
-               /// </summary>\r
-               public int MinSize {\r
-                       get {\r
-                               return _minSize;\r
-                       }\r
-               }\r
-               \r
-               /// <summary>\r
-               /// Returns the skip between valid key sizes in bits;\r
-               /// </summary>\r
-               public int SkipSize {\r
-                       get {\r
-                               return _skipSize;\r
-                       }\r
-               }               \r
-       }\r
-}\r
-\r
+//
+// System.Security.Cryptography KeySizes Class implementation
+//
+// Authors:
+//     Matthew S. Ford (Matthew.S.Ford@Rose-Hulman.Edu)
+//     Ben Maurer (bmaurer@users.sf.net)
+//     Sebastien Pouliot (sebastien@ximian.com)
+//
+// Copyright 2001 by Matthew S. Ford.
+// (C) 2004 Novell (http://www.novell.com)
+//
+
+//
+// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+namespace System.Security.Cryptography {
+       
+#if NET_1_0
+       public class KeySizes {
+#else
+       public sealed class KeySizes {
+#endif
+               private int _maxSize;
+               private int _minSize;
+               private int _skipSize;
+
+               public KeySizes (int minSize, int maxSize, int skipSize) 
+               {
+                       _maxSize = maxSize;
+                       _minSize = minSize;
+                       _skipSize = skipSize;
+               }
+               
+               public int MaxSize {
+                       get { return _maxSize; }
+               }
+               
+               public int MinSize {
+                       get { return _minSize; }
+               }
+               
+               public int SkipSize {
+                       get { return _skipSize; }
+               }
+       
+               internal bool IsLegal (int keySize) 
+               {
+                       int ks = keySize - MinSize;
+                       bool result = ((ks >= 0) && (keySize <= MaxSize));
+                       return ((SkipSize == 0) ? result : (result && (ks % SkipSize == 0)));
+               }
+
+               internal static bool IsLegalKeySize (KeySizes[] legalKeys, int size) 
+               {
+                       foreach (KeySizes legalKeySize in legalKeys) {
+                               if (legalKeySize.IsLegal (size)) 
+                                       return true;
+                       }
+                       return false;
+               }
+       }
+}