KeySize Property

AsymmetricAlgorithm.KeySize Property

Gets or sets the size, in bits, of the key modulus used by the asymmetric algorithm.

Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)

public virtual int KeySize { get; set; }
/** @property */
public int get_KeySize ()

/** @property */
public void set_KeySize (int value)

public function get KeySize () : int

public function set KeySize (value : int)

Property Value

The size, in bits, of the key modulus used by the asymmetric algorithm.

Exception typeCondition

CryptographicException

The key modulus size is invalid.

The valid key sizes are specified by the particular implementation of the asymmetric algorithm and are listed in the LegalKeySizes property.

The following code example demonstrates how to override the KeySize property to verify that it falls within the range identified in the local keySizes member variable. This code example is part of a larger example provided for the AsymmetricAlgorithm class.

public override int KeySize 
{
    get { return KeySizeValue; }
    set
    {
        for (int i=0; i < keySizes.Length; i++)
        {
            if (keySizes[i].SkipSize == 0) 
            {
                if (keySizes[i].MinSize == value)
                {
                    KeySizeValue = value;
                    return;
                }
            }
            else
            {
                for (int j = keySizes[i].MinSize;
                    j <= keySizes[i].MaxSize;
                    j += keySizes[i].SkipSize)
                {
                    if (j == value)
                    {
                        KeySizeValue = value;
                        return;
                    }
                }
            }
        }

        // If the key does not fall within the range identified 
        // in the keySizes member variable, throw an exception.
        throw new CryptographicException("Invalid key size.");
    }
}

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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