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KeySizes Class
Visual Studio 2010
Determines the set of valid key sizes for the symmetric cryptographic algorithms.
Assembly: mscorlib (in mscorlib.dll)
The KeySizes type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
The following example shows the use of members of the KeySizes class.
using System; using System.Security.Cryptography; namespace Contoso { class KeySizesMembers { [STAThread] static void Main(string[] args) { // Initializes a new instance of the KeySizes class with the // specified key values. int minSize = 64; int maxSize = 1024; int skipSize = 64; KeySizes keySizes = new KeySizes(minSize, maxSize, skipSize); // Show the values of the keys. ShowKeys(new KeySizes[1]{keySizes}, "Custom Keys"); // Create a new symmetric algorithm and display its key values. SymmetricAlgorithm rijn = SymmetricAlgorithm.Create(); ShowKeys(rijn.LegalKeySizes, rijn.ToString()); Console.WriteLine("rijn.blocksize:" + rijn.BlockSize); // Create a new RSA algorithm and display its key values. RSACryptoServiceProvider rsaCSP = new RSACryptoServiceProvider(384); ShowKeys(rsaCSP.LegalKeySizes, rsaCSP.ToString()); Console.WriteLine("RSACryptoServiceProvider KeySize = " + rsaCSP.KeySize); Console.WriteLine("This sample completed successfully; " + "press Enter to exit."); Console.ReadLine(); } // Display specified KeySize properties to the console. private static void ShowKeys(KeySizes[] keySizes, string objectName) { // Retrieve the first KeySizes in the array. KeySizes firstKeySize = keySizes[0]; // Retrieve the minimum key size in bits. int minKeySize = firstKeySize.MinSize; // Retrieve the maximum key size in bits. int maxKeySize = firstKeySize.MaxSize; // Retrieve the interval between valid key size in bits. int skipKeySize = firstKeySize.SkipSize; Console.Write("\n KeySizes retrieved from the "); Console.WriteLine(objectName + " object."); Console.WriteLine("Minimum key size bits: " + minKeySize); Console.WriteLine("Maximum key size bits: " + maxKeySize); Console.WriteLine("Interval between key size bits: " + skipKeySize); } } } // // This sample produces the following output: // // KeySizes retrieved from the Custom Keys object. // Minimum key size bits: 64 // Maximum key size bits: 1024 // Interval between key size bits: 64 // // KeySizes retrieved from the System.Security.Cryptography.RijndaelManaged // object. // Minimum key size bits: 128 // Maximum key size bits: 256 // Interval between key size bits: 64 // rijn.blocksize:128 // // KeySizes retrieved from the // System.Security.Cryptography.RSACryptoServiceProvider object. // Minimum key size bits: 384 // Maximum key size bits: 16384 // Interval between key size bits: 8 // RSACryptoServiceProvider KeySize = 384 // This sample completed successfully; press Enter to exit.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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