AsymmetricKeyExchangeDeformatter AsymmetricKeyExchangeDeformatter AsymmetricKeyExchangeDeformatter AsymmetricKeyExchangeDeformatter Class

定義

すべての非対象キーの、交換逆フォーマッタの派生元になる基底クラスを表します。Represents the base class from which all asymmetric key exchange deformatters derive.

public ref class AsymmetricKeyExchangeDeformatter abstract
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class AsymmetricKeyExchangeDeformatter
type AsymmetricKeyExchangeDeformatter = class
Public MustInherit Class AsymmetricKeyExchangeDeformatter
継承
AsymmetricKeyExchangeDeformatterAsymmetricKeyExchangeDeformatterAsymmetricKeyExchangeDeformatterAsymmetricKeyExchangeDeformatter
派生
属性

AsymmetricKeyExchangeDeformatterクラスを拡張する方法を次の例に示します。The following example demonstrates how to extend the AsymmetricKeyExchangeDeformatter class.

using System;
using System.Security.Cryptography;

namespace Contoso
{
    public class ContosoDeformatter : AsymmetricKeyExchangeDeformatter
    {
        private RSA rsaKey;

        // Default constructor.
        public ContosoDeformatter(){}

        // Constructor with the public key to use for encryption.
        public ContosoDeformatter(AsymmetricAlgorithm key)
        {
            SetKey(key);
        }

        // Set the public key for encyption operations.
        public override void SetKey(AsymmetricAlgorithm key) {
            if (key != null)
            {
                rsaKey = (RSA)key;
            }
            else
            {
                throw new ArgumentNullException("key");
            }
        }

        // Disallow access to the parameters of the formatter.
        public override String Parameters 
        {
            get { return null; }
            set { ; }
        }

        // Create the encrypted key exchange data from the specified input
        // data. This method uses the RSACryptoServiceProvider only. To
        // support additional providers or provide custom decryption logic,
        // add logic to this member.
        public override byte[] DecryptKeyExchange(byte[] rgbData) {
            byte[] decryptedBytes = null;

            if (rsaKey != null)
            {
                if (rsaKey is RSACryptoServiceProvider)
                {
                    RSACryptoServiceProvider serviceProvder =
                        (RSACryptoServiceProvider)rsaKey;

                    decryptedBytes = serviceProvder.Decrypt(rgbData, true);
                }
                // Add custom decryption logic here.
            }
            else
            {
                throw new CryptographicUnexpectedOperationException(
                    "Cryptography_MissingKey");
            }

            return decryptedBytes;
        }
    }
}
//
// This code example produces the following output:
//
// Data to encrypt : Sample Contoso encryption application.
// Encrypted data: Khasdf-3248&$%23
// Data decrypted : Sample Contoso encryption application.
// 
// This sample completed successfully; press Enter to exit.
Imports System.Security.Cryptography

Namespace Contoso
    Public Class ContosoDeformatter
        Inherits AsymmetricKeyExchangeDeformatter

        Private rsaKey As RSA

        ' Default constructor.
        Public Sub New()

        End Sub

        ' Constructor with the public key to use for encryption.
        Public Sub New(ByVal key As AsymmetricAlgorithm)
            SetKey(key)
        End Sub

        ' Set the public key for encyption operations.
        Public Overrides Sub SetKey(ByVal key As AsymmetricAlgorithm)
            If (Not key Is Nothing) Then
                rsaKey = CType(key, RSA)
            Else
                Throw New ArgumentNullException("key")
            End If
        End Sub

        ' Disallow access to the parameters of the formatter.
        Public Overrides ReadOnly Property Parameters() As String
            Get
                Return Nothing
            End Get
            Set(ByVal Value As String)

            End Set
        End Property

        ' Create the encrypted key exchange data from the specified input
        ' data. This method uses the RSACryptoServiceProvider only. To
        ' support additional providers or provide custom decryption logic,
        ' add logic to this member.
        Public Overrides Function DecryptKeyExchange(
            ByVal rgbData() As Byte) As Byte()

            Dim decryptedBytes() As Byte

            If (Not rsaKey Is Nothing) Then
                If (TypeOf (rsaKey) Is RSACryptoServiceProvider) Then
                    Dim rsaProvider As RSACryptoServiceProvider
                    rsaProvider = CType(rsaKey, RSACryptoServiceProvider)

                    decryptedBytes = rsaProvider.Decrypt(rgbData, True)
                End If

                ' Add custom decryption logic here.

            Else
                Throw New CryptographicUnexpectedOperationException(
                    "Cryptography_MissingKey")
            End If

            Return decryptedBytes
        End Function

    End Class
End Namespace
'
' This code example produces the following output:
'
' Data to encrypt : Sample Contoso encryption application.
' Encrypted data: Kh34dfg-(*&834d+3
' Data decrypted : Sample Contoso encryption application.
' 
' This sample completed successfully; press Exit to continue.

注釈

非対称キー交換逆フォーマッタは、キー交換データの暗号化を解除します。Asymmetric key exchange deformatters decrypt key exchange data.

キー交換では、対称暗号化アルゴリズムでキーとして使用できるランダムなデータなどの機密情報を送信者が作成し、暗号化を使用して目的の受信者に送信することができます。Key exchange allows a sender to create secret information, such as random data that can be used as a key in a symmetric encryption algorithm, and use encryption to send it to the intended recipient.

注意事項

キー交換を成功させるには、操作の詳細情報を慎重に実行する必要があるため、提供されている基本的な機能から独自のキー交換メソッドを作成しないことを強くお勧めします。It is highly recommended that you not attempt to create your own key exchange method from the basic functionality provided, because many details of the operation must be performed carefully in order for the key exchange to be successful.

コンストラクター

AsymmetricKeyExchangeDeformatter() AsymmetricKeyExchangeDeformatter() AsymmetricKeyExchangeDeformatter() AsymmetricKeyExchangeDeformatter()

AsymmetricKeyExchangeDeformatter の新しいインスタンスを初期化します。Initializes a new instance of AsymmetricKeyExchangeDeformatter.

プロパティ

Parameters Parameters Parameters Parameters

派生クラスでオーバーライドされたときに、非対称キー交換のパラメーターを取得または設定します。When overridden in a derived class, gets or sets the parameters for the asymmetric key exchange.

メソッド

DecryptKeyExchange(Byte[]) DecryptKeyExchange(Byte[]) DecryptKeyExchange(Byte[]) DecryptKeyExchange(Byte[])

派生クラスでオーバーライドされると、暗号化されたキー交換データから機密情報を抽出します。When overridden in a derived class, extracts secret information from the encrypted key exchange data.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(Inherited from Object)
SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm)

派生クラスでオーバーライドされると、秘密情報の暗号化を解除するために使用する秘密キーを設定します。When overridden in a derived class, sets the private key to use for decrypting the secret information.

ToString() ToString() ToString() ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(Inherited from Object)

適用対象