-//\r
-// System.Security.Cryptography.AsymmetricAlgorithm Class implementation\r
-//\r
-// Authors:\r
-// Thomas Neidhart (tome@sbox.tugraz.at)\r
-// Sebastien Pouliot (spouliot@motus.com)\r
-//\r
-// Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)\r
-//\r
-\r
-using System;\r
-using System.Xml;\r
-\r
-namespace System.Security.Cryptography {\r
-\r
- /// <summary>\r
- /// Abstract base class for all cryptographic asymmetric algorithms.\r
- /// Available algorithms include:\r
- /// RSA, DSA\r
- /// </summary>\r
- public abstract class AsymmetricAlgorithm : IDisposable {\r
-\r
- protected int KeySizeValue; // The size of the secret key used by the symmetric algorithm in bits. \r
- protected KeySizes[] LegalKeySizesValue; // Specifies the key sizes that are supported by the symmetric algorithm. \r
-\r
- /// <summary>\r
- /// Called from constructor of derived class.\r
- /// </summary>\r
- protected AsymmetricAlgorithm () {}\r
- \r
- /// <summary>\r
- /// Gets the key exchange algorithm\r
- /// </summary>\r
- public abstract string KeyExchangeAlgorithm {get;}\r
- \r
- /// <summary>\r
- /// Gets or sets the actual key size\r
- /// </summary>\r
- public virtual int KeySize {\r
- get {\r
- return this.KeySizeValue;\r
- }\r
- set {\r
- if (!IsLegalKeySize(this.LegalKeySizesValue, value))\r
- throw new CryptographicException("key size not supported by algorithm");\r
- \r
- this.KeySizeValue = value;\r
- }\r
- }\r
-\r
- /// <summary>\r
- /// Gets all legal key sizes\r
- /// </summary>\r
- public virtual KeySizes[] LegalKeySizes {\r
- get {\r
- return this.LegalKeySizesValue;\r
- }\r
- }\r
-\r
- /// <summary>\r
- /// Gets the signature algorithm\r
- /// </summary>\r
- public abstract string SignatureAlgorithm {get;}\r
-\r
- void System.IDisposable.Dispose() \r
- {\r
- }\r
-\r
- public void Clear() \r
- {\r
-// Dispose();\r
- }\r
-\r
- protected abstract void Dispose (bool disposing);\r
-\r
- // helper function for FromXmlString (used in RSA and DSA)\r
- protected byte[] GetElement (XmlDocument xml, string tag) \r
- {\r
- XmlNodeList xnl = xml.GetElementsByTagName (tag);\r
- if (xnl.Count > 0)\r
- return Convert.FromBase64String (xnl[0].InnerText);\r
- else\r
- return null;\r
- }\r
-\r
- /// <summary>\r
- /// Reconstructs the AsymmetricAlgorithm Object from an XML-string\r
- /// </summary>\r
- public abstract void FromXmlString(string xmlString);\r
- \r
- /// <summary>\r
- /// Returns an XML string representation the current AsymmetricAlgorithm object\r
- /// </summary>\r
- public abstract string ToXmlString(bool includePrivateParameters); \r
- \r
- private bool IsLegalKeySize(KeySizes[] LegalKeys, int Size) \r
- {\r
- foreach (KeySizes LegalKeySize in LegalKeys) {\r
- for (int i=LegalKeySize.MinSize; i<=LegalKeySize.MaxSize; i+=LegalKeySize.SkipSize) {\r
- if (i == Size)\r
- return true;\r
- }\r
- }\r
- return false;\r
- }\r
- \r
- /// <summary>\r
- /// Checks wether the given keyLength is valid for the current algorithm\r
- /// </summary>\r
- /// <param name="bitLength">the given keyLength</param>\r
- public bool ValidKeySize(int bitLength) \r
- {\r
- return IsLegalKeySize(LegalKeySizesValue, bitLength);\r
- }\r
- \r
- /// <summary>\r
- /// Creates the default implementation of the default asymmetric algorithm (RSA).\r
- /// </summary>\r
- public static AsymmetricAlgorithm Create () \r
- {\r
- return Create ("System.Security.Cryptography.AsymmetricAlgorithm");\r
- }\r
- \r
- /// <summary>\r
- /// Creates a specific implementation of the given asymmetric algorithm.\r
- /// </summary>\r
- /// <param name="algo">Specifies which derived class to create</param>\r
- public static AsymmetricAlgorithm Create (string algName) \r
- {\r
- return (AsymmetricAlgorithm) CryptoConfig.CreateFromName (algName);\r
- }\r
- }\r
-}\r
-\r
+//
+// System.Security.Cryptography.AsymmetricAlgorithm Class implementation
+//
+// Authors:
+// Thomas Neidhart (tome@sbox.tugraz.at)
+// Sebastien Pouliot (sebastien@ximian.com)
+//
+// Portions (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
+// Copyright (C) 2004-2005 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.
+//
+
+using System.Globalization;
+using System.Runtime.InteropServices;
+
+namespace System.Security.Cryptography {
+
+#if NET_2_0
+ [ComVisible (true)]
+#endif
+ public abstract class AsymmetricAlgorithm : IDisposable {
+
+ protected int KeySizeValue;
+ protected KeySizes[] LegalKeySizesValue;
+
+ protected AsymmetricAlgorithm ()
+ {
+ }
+
+ public abstract string KeyExchangeAlgorithm {
+ get;
+ }
+
+ public virtual int KeySize {
+ get { return this.KeySizeValue; }
+ set {
+ if (!KeySizes.IsLegalKeySize (this.LegalKeySizesValue, value))
+ throw new CryptographicException (Locale.GetText ("Key size not supported by algorithm."));
+
+ this.KeySizeValue = value;
+ }
+ }
+
+ public virtual KeySizes[] LegalKeySizes {
+ get { return this.LegalKeySizesValue; }
+ }
+
+ public abstract string SignatureAlgorithm {
+ get;
+ }
+
+ void IDisposable.Dispose ()
+ {
+ Dispose (true);
+ GC.SuppressFinalize (this); // Finalization is now unnecessary
+ }
+
+ public void Clear ()
+ {
+ Dispose (false);
+ }
+
+ protected abstract void Dispose (bool disposing);
+
+ public abstract void FromXmlString (string xmlString);
+
+ public abstract string ToXmlString (bool includePrivateParameters);
+
+ public static AsymmetricAlgorithm Create ()
+ {
+ return Create ("System.Security.Cryptography.AsymmetricAlgorithm");
+ }
+
+ public static AsymmetricAlgorithm Create (string algName)
+ {
+ return (AsymmetricAlgorithm) CryptoConfig.CreateFromName (algName);
+ }
+ }
+}
projects / mono.git / blobdiff